*: cleanup collector API 1 (#1547)

.gitattributes

@@ -0,0 +1,3 @@
+*.go text eol=lf
+*.sh text eol=lf
+Makefile text eol=lf

.github/workflows/lint.yml

@@ -100,5 +100,5 @@ jobs:
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v6
         with:
-          version: v1.58
-          args: "--timeout=5m --out-format github-actions,colored-line-number"
+          version: v1.59
+          args: "--timeout=5m"

.github/workflows/pr-check.yaml

@@ -37,10 +37,12 @@ jobs:
       - name: check
         run: |
           PR_TITLE_PREFIX=$(echo "$PR_TITLE" | cut -d':' -f1)
-          if [[ ! -d "pkg/collector/$PR_TITLE_PREFIX" ]] || [[ "$PR_TITLE_PREFIX" == "chore(deps)" ]] || [[ "$PR_TITLE_PREFIX" == "chore" ]] || [[ "$PR_TITLE_PREFIX" == "*" ]]; then
+          if [[ -d "pkg/collector/$PR_TITLE_PREFIX" ]] || [[ "$PR_TITLE_PREFIX" == "chore" ]] || [[ "$PR_TITLE_PREFIX" == "chore(deps)" ]] || [[ "$PR_TITLE_PREFIX" == "*" ]]; then
+            exit 0
+          fi
+
           echo "PR title must start with an name of an collector package"
           echo "Example: 'logical_disk: description'"
           exit 1
-          fi
         env:
           PR_TITLE: ${{ github.event.pull_request.title }}

.golangci.yaml

@@ -1,14 +1,8 @@
 linters:
   enable-all: true
   disable:
-    - asasalint
-    - asciicheck
-    - bidichk
-    - bodyclose
-    - canonicalheader
     - containedctx
     - contextcheck
-    - copyloopvar
     - cyclop
     - decorder
     - depguard
@@ -24,10 +18,7 @@ linters:
     - exhaustruct
     - exportloopref
     - fatcontext
-    - forbidigo
-    - forcetypeassert
     - funlen
-    - gci
     - ginkgolinter
     - gocheckcompilerdirectives
     - gochecknoglobals
@@ -40,12 +31,9 @@ linters:
     - godot
     - godox
     - gofumpt
-    - goheader
     - goimports
     - gomoddirectives
     - gomodguard
-    - goprintffuncname
-    - gosec
     - gosimple
     - gosmopolitan
     - grouper
@@ -56,7 +44,6 @@ linters:
     - ireturn
     - lll
     - maintidx
-    - makezero
     - mirror
     - misspell
     - mnd
@@ -65,7 +52,6 @@ linters:
     - nestif
     - nlreturn
     - noctx
-    - nolintlint
     - nonamedreturns
     - nosprintfhostport
     - paralleltest
@@ -86,13 +72,9 @@ linters:
     - testpackage
     - thelper
     - tparallel
-    - usestdlibvars
     - varnamelen
-    - wastedassign
-    - whitespace
     - wrapcheck
     - wsl
-    - zerologlint
     - execinquery
     - gomnd
 

exporter.go

@@ -5,29 +5,30 @@
 package main
 
 import (
-	// Its important that we do these first so that we can register with the Windows service control ASAP to avoid timeouts
-	"github.com/prometheus-community/windows_exporter/pkg/initiate"
-
+	"context"
 	"encoding/json"
 	"fmt"
 	"net/http"
 	"net/http/pprof"
 	"os"
+	"os/signal"
 	"os/user"
 	"runtime"
 	"sort"
 	"strings"
-
-	winlog "github.com/prometheus-community/windows_exporter/pkg/log"
-	"github.com/prometheus-community/windows_exporter/pkg/types"
-	"github.com/prometheus-community/windows_exporter/pkg/utils"
-	"github.com/prometheus-community/windows_exporter/pkg/wmi"
+	"time"
 
 	"github.com/alecthomas/kingpin/v2"
 	"github.com/go-kit/log/level"
 	"github.com/prometheus-community/windows_exporter/pkg/collector"
 	"github.com/prometheus-community/windows_exporter/pkg/config"
+	// Its important that we do these first so that we can register with the Windows service control ASAP to avoid timeouts
+	"github.com/prometheus-community/windows_exporter/pkg/initiate"
+	winlog "github.com/prometheus-community/windows_exporter/pkg/log"
 	"github.com/prometheus-community/windows_exporter/pkg/log/flag"
+	"github.com/prometheus-community/windows_exporter/pkg/types"
+	"github.com/prometheus-community/windows_exporter/pkg/utils"
+	"github.com/prometheus-community/windows_exporter/pkg/wmi"
 	"github.com/prometheus/common/version"
 	"github.com/prometheus/exporter-toolkit/web"
 	webflag "github.com/prometheus/exporter-toolkit/web/kingpinflag"
@@ -171,9 +172,9 @@ func main() {
 		collectorNames := collector.Available()
 		sort.Strings(collectorNames)
 
-		fmt.Printf("Available collectors:\n")
+		fmt.Printf("Available collectors:\n") //nolint:forbidigo
 		for _, n := range collectorNames {
-			fmt.Printf(" - %s\n", n)
+			fmt.Printf(" - %s\n", n) //nolint:forbidigo
 		}
 
 		return
@@ -259,20 +260,37 @@ func main() {
 	_ = level.Info(logger).Log("msg", "Build context", "build_context", version.BuildContext())
 	_ = level.Debug(logger).Log("msg", "Go MAXPROCS", "procs", runtime.GOMAXPROCS(0))
 
+	server := &http.Server{
+		ReadHeaderTimeout: 5 * time.Second,
+		IdleTimeout:       60 * time.Second,
+		ReadTimeout:       5 * time.Second,
+		WriteTimeout:      10 * time.Minute,
+		Handler:           mux,
+	}
+
 	go func() {
-		server := &http.Server{Handler: mux}
 		if err := web.ListenAndServe(server, webConfig, logger); err != nil {
 			_ = level.Error(logger).Log("msg", "cannot start windows_exporter", "err", err)
 			os.Exit(1)
 		}
 	}()
 
-	for {
-		if <-initiate.StopCh {
-			_ = level.Info(logger).Log("msg", "Shutting down windows_exporter")
-			break
-		}
+	ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt, os.Kill)
+	defer stop()
+
+	select {
+	case <-ctx.Done():
+		_ = level.Info(logger).Log("msg", "Shutting down windows_exporter via kill signal")
+	case <-initiate.StopCh:
+		_ = level.Info(logger).Log("msg", "Shutting down windows_exporter via service control")
 	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer cancel()
+
+	_ = server.Shutdown(ctx)
+
+	_ = level.Info(logger).Log("msg", "windows_exporter has shut down")
 }
 
 func withConcurrencyLimit(n int, next http.HandlerFunc) http.HandlerFunc {

pkg/collector/adcs/adcs.go

@@ -21,120 +21,125 @@ type Config struct{}
 
 var ConfigDefaults = Config{}
 
-type collector struct {
+type Collector struct {
 	logger log.Logger
 
-	RequestsPerSecond                            *prometheus.Desc
-	RequestProcessingTime                        *prometheus.Desc
-	RetrievalsPerSecond                          *prometheus.Desc
-	RetrievalProcessingTime                      *prometheus.Desc
-	FailedRequestsPerSecond                      *prometheus.Desc
-	IssuedRequestsPerSecond                      *prometheus.Desc
-	PendingRequestsPerSecond                     *prometheus.Desc
-	RequestCryptographicSigningTime              *prometheus.Desc
-	RequestPolicyModuleProcessingTime            *prometheus.Desc
-	ChallengeResponsesPerSecond                  *prometheus.Desc
-	ChallengeResponseProcessingTime              *prometheus.Desc
-	SignedCertificateTimestampListsPerSecond     *prometheus.Desc
-	SignedCertificateTimestampListProcessingTime *prometheus.Desc
+	challengeResponseProcessingTime              *prometheus.Desc
+	challengeResponsesPerSecond                  *prometheus.Desc
+	failedRequestsPerSecond                      *prometheus.Desc
+	issuedRequestsPerSecond                      *prometheus.Desc
+	pendingRequestsPerSecond                     *prometheus.Desc
+	requestCryptographicSigningTime              *prometheus.Desc
+	requestPolicyModuleProcessingTime            *prometheus.Desc
+	requestProcessingTime                        *prometheus.Desc
+	requestsPerSecond                            *prometheus.Desc
+	retrievalProcessingTime                      *prometheus.Desc
+	retrievalsPerSecond                          *prometheus.Desc
+	signedCertificateTimestampListProcessingTime *prometheus.Desc
+	signedCertificateTimestampListsPerSecond     *prometheus.Desc
 }
 
-func New(logger log.Logger, _ *Config) types.Collector {
-	c := &collector{}
+func New(logger log.Logger, _ *Config) *Collector {
+	c := &Collector{}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(_ *kingpin.Application) types.Collector {
-	return &collector{}
+func NewWithFlags(_ *kingpin.Application) *Collector {
+	return &Collector{}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{"Certification Authority"}, nil
 }
 
-func (c *collector) Build() error {
-	c.RequestsPerSecond = prometheus.NewDesc(
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
+	c.requestsPerSecond = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "requests_total"),
 		"Total certificate requests processed",
 		[]string{"cert_template"},
 		nil,
 	)
-	c.RequestProcessingTime = prometheus.NewDesc(
+	c.requestProcessingTime = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "request_processing_time_seconds"),
 		"Last time elapsed for certificate requests",
 		[]string{"cert_template"},
 		nil,
 	)
-	c.RetrievalsPerSecond = prometheus.NewDesc(
+	c.retrievalsPerSecond = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "retrievals_total"),
 		"Total certificate retrieval requests processed",
 		[]string{"cert_template"},
 		nil,
 	)
-	c.RetrievalProcessingTime = prometheus.NewDesc(
+	c.retrievalProcessingTime = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "retrievals_processing_time_seconds"),
 		"Last time elapsed for certificate retrieval request",
 		[]string{"cert_template"},
 		nil,
 	)
-	c.FailedRequestsPerSecond = prometheus.NewDesc(
+	c.failedRequestsPerSecond = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "failed_requests_total"),
 		"Total failed certificate requests processed",
 		[]string{"cert_template"},
 		nil,
 	)
-	c.IssuedRequestsPerSecond = prometheus.NewDesc(
+	c.issuedRequestsPerSecond = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "issued_requests_total"),
 		"Total issued certificate requests processed",
 		[]string{"cert_template"},
 		nil,
 	)
-	c.PendingRequestsPerSecond = prometheus.NewDesc(
+	c.pendingRequestsPerSecond = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "pending_requests_total"),
 		"Total pending certificate requests processed",
 		[]string{"cert_template"},
 		nil,
 	)
-	c.RequestCryptographicSigningTime = prometheus.NewDesc(
+	c.requestCryptographicSigningTime = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "request_cryptographic_signing_time_seconds"),
 		"Last time elapsed for signing operation request",
 		[]string{"cert_template"},
 		nil,
 	)
-	c.RequestPolicyModuleProcessingTime = prometheus.NewDesc(
+	c.requestPolicyModuleProcessingTime = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "request_policy_module_processing_time_seconds"),
 		"Last time elapsed for policy module processing request",
 		[]string{"cert_template"},
 		nil,
 	)
-	c.ChallengeResponsesPerSecond = prometheus.NewDesc(
+	c.challengeResponsesPerSecond = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "challenge_responses_total"),
 		"Total certificate challenge responses processed",
 		[]string{"cert_template"},
 		nil,
 	)
-	c.ChallengeResponseProcessingTime = prometheus.NewDesc(
+	c.challengeResponseProcessingTime = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "challenge_response_processing_time_seconds"),
 		"Last time elapsed for challenge response",
 		[]string{"cert_template"},
 		nil,
 	)
-	c.SignedCertificateTimestampListsPerSecond = prometheus.NewDesc(
+	c.signedCertificateTimestampListsPerSecond = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "signed_certificate_timestamp_lists_total"),
 		"Total Signed Certificate Timestamp Lists processed",
 		[]string{"cert_template"},
 		nil,
 	)
-	c.SignedCertificateTimestampListProcessingTime = prometheus.NewDesc(
+	c.signedCertificateTimestampListProcessingTime = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "signed_certificate_timestamp_list_processing_time_seconds"),
 		"Last time elapsed for Signed Certificate Timestamp List",
 		[]string{"cert_template"},
@@ -144,7 +149,7 @@ func (c *collector) Build() error {
 	return nil
 }
 
-func (c *collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	if err := c.collectADCSCounters(ctx, ch); err != nil {
 		_ = level.Error(c.logger).Log("msg", "failed collecting ADCS metrics", "err", err)
 		return err
@@ -169,7 +174,7 @@ type perflibADCS struct {
 	SignedCertificateTimestampListProcessingTime float64 `perflib:"Signed Certificate Timestamp List processing time (ms)"`
 }
 
-func (c *collector) collectADCSCounters(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) collectADCSCounters(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	dst := make([]perflibADCS, 0)
 	if _, ok := ctx.PerfObjects["Certification Authority"]; !ok {
 		return errors.New("perflib did not contain an entry for Certification Authority")
@@ -188,79 +193,79 @@ func (c *collector) collectADCSCounters(ctx *types.ScrapeContext, ch chan<- prom
 			continue
 		}
 		ch <- prometheus.MustNewConstMetric(
-			c.RequestsPerSecond,
+			c.requestsPerSecond,
 			prometheus.CounterValue,
 			d.RequestsPerSecond,
 			d.Name,
 		)
 		ch <- prometheus.MustNewConstMetric(
-			c.RequestProcessingTime,
+			c.requestProcessingTime,
 			prometheus.GaugeValue,
 			utils.MilliSecToSec(d.RequestProcessingTime),
 			d.Name,
 		)
 		ch <- prometheus.MustNewConstMetric(
-			c.RetrievalsPerSecond,
+			c.retrievalsPerSecond,
 			prometheus.CounterValue,
 			d.RetrievalsPerSecond,
 			d.Name,
 		)
 		ch <- prometheus.MustNewConstMetric(
-			c.RetrievalProcessingTime,
+			c.retrievalProcessingTime,
 			prometheus.GaugeValue,
 			utils.MilliSecToSec(d.RetrievalProcessingTime),
 			d.Name,
 		)
 		ch <- prometheus.MustNewConstMetric(
-			c.FailedRequestsPerSecond,
+			c.failedRequestsPerSecond,
 			prometheus.CounterValue,
 			d.FailedRequestsPerSecond,
 			d.Name,
 		)
 		ch <- prometheus.MustNewConstMetric(
-			c.IssuedRequestsPerSecond,
+			c.issuedRequestsPerSecond,
 			prometheus.CounterValue,
 			d.IssuedRequestsPerSecond,
 			d.Name,
 		)
 		ch <- prometheus.MustNewConstMetric(
-			c.PendingRequestsPerSecond,
+			c.pendingRequestsPerSecond,
 			prometheus.CounterValue,
 			d.PendingRequestsPerSecond,
 			d.Name,
 		)
 		ch <- prometheus.MustNewConstMetric(
-			c.RequestCryptographicSigningTime,
+			c.requestCryptographicSigningTime,
 			prometheus.GaugeValue,
 			utils.MilliSecToSec(d.RequestCryptographicSigningTime),
 			d.Name,
 		)
 		ch <- prometheus.MustNewConstMetric(
-			c.RequestPolicyModuleProcessingTime,
+			c.requestPolicyModuleProcessingTime,
 			prometheus.GaugeValue,
 			utils.MilliSecToSec(d.RequestPolicyModuleProcessingTime),
 			d.Name,
 		)
 		ch <- prometheus.MustNewConstMetric(
-			c.ChallengeResponsesPerSecond,
+			c.challengeResponsesPerSecond,
 			prometheus.CounterValue,
 			d.ChallengeResponsesPerSecond,
 			d.Name,
 		)
 		ch <- prometheus.MustNewConstMetric(
-			c.ChallengeResponseProcessingTime,
+			c.challengeResponseProcessingTime,
 			prometheus.GaugeValue,
 			utils.MilliSecToSec(d.ChallengeResponseProcessingTime),
 			d.Name,
 		)
 		ch <- prometheus.MustNewConstMetric(
-			c.SignedCertificateTimestampListsPerSecond,
+			c.signedCertificateTimestampListsPerSecond,
 			prometheus.CounterValue,
 			d.SignedCertificateTimestampListsPerSecond,
 			d.Name,
 		)
 		ch <- prometheus.MustNewConstMetric(
-			c.SignedCertificateTimestampListProcessingTime,
+			c.signedCertificateTimestampListProcessingTime,
 			prometheus.GaugeValue,
 			utils.MilliSecToSec(d.SignedCertificateTimestampListProcessingTime),
 			d.Name,

pkg/collector/adfs/adfs.go

@@ -18,20 +18,21 @@ type Config struct{}
 
 var ConfigDefaults = Config{}
 
-type collector struct {
+type Collector struct {
 	logger log.Logger
 
 	adLoginConnectionFailures                          *prometheus.Desc
+	artifactDBFailures                                 *prometheus.Desc
+	avgArtifactDBQueryTime                             *prometheus.Desc
+	avgConfigDBQueryTime                               *prometheus.Desc
 	certificateAuthentications                         *prometheus.Desc
+	configDBFailures                                   *prometheus.Desc
 	deviceAuthentications                              *prometheus.Desc
+	externalAuthenticationFailures                     *prometheus.Desc
+	externalAuthentications                            *prometheus.Desc
 	extranetAccountLockouts                            *prometheus.Desc
 	federatedAuthentications                           *prometheus.Desc
-	passportAuthentications                            *prometheus.Desc
-	passiveRequests                                    *prometheus.Desc
-	passwordChangeFailed                               *prometheus.Desc
-	passwordChangeSucceeded                            *prometheus.Desc
-	tokenRequests                                      *prometheus.Desc
-	windowsIntegratedAuthentications                   *prometheus.Desc
+	federationMetadataRequests                         *prometheus.Desc
 	oAuthAuthZRequests                                 *prometheus.Desc
 	oAuthClientAuthentications                         *prometheus.Desc
 	oAuthClientAuthenticationsFailures                 *prometheus.Desc
@@ -50,45 +51,49 @@ type collector struct {
 	oAuthPasswordGrantRequestFailures                  *prometheus.Desc
 	oAuthPasswordGrantRequests                         *prometheus.Desc
 	oAuthTokenRequests                                 *prometheus.Desc
+	passiveRequests                                    *prometheus.Desc
+	passportAuthentications                            *prometheus.Desc
+	passwordChangeFailed                               *prometheus.Desc
+	passwordChangeSucceeded                            *prometheus.Desc
 	samlPTokenRequests                                 *prometheus.Desc
 	ssoAuthenticationFailures                          *prometheus.Desc
 	ssoAuthentications                                 *prometheus.Desc
-	wsfedTokenRequests                                 *prometheus.Desc
-	wstrustTokenRequests                               *prometheus.Desc
+	tokenRequests                                      *prometheus.Desc
 	upAuthenticationFailures                           *prometheus.Desc
 	upAuthentications                                  *prometheus.Desc
-	externalAuthenticationFailures                     *prometheus.Desc
-	externalAuthentications                            *prometheus.Desc
-	artifactDBFailures                                 *prometheus.Desc
-	avgArtifactDBQueryTime                             *prometheus.Desc
-	configDBFailures                                   *prometheus.Desc
-	avgConfigDBQueryTime                               *prometheus.Desc
-	federationMetadataRequests                         *prometheus.Desc
+	windowsIntegratedAuthentications                   *prometheus.Desc
+	wsfedTokenRequests                                 *prometheus.Desc
+	wstrustTokenRequests                               *prometheus.Desc
 }
 
-func New(logger log.Logger, _ *Config) types.Collector {
-	c := &collector{}
+func New(logger log.Logger, _ *Config) *Collector {
+	c := &Collector{}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(_ *kingpin.Application) types.Collector {
-	return &collector{}
+func NewWithFlags(_ *kingpin.Application) *Collector {
+	return &Collector{}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{"AD FS"}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	c.adLoginConnectionFailures = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "ad_login_connection_failures_total"),
 		"Total number of connection failures to an Active Directory domain controller",
@@ -397,7 +402,7 @@ type perflibADFS struct {
 	FederationMetadataRequests           float64 `perflib:"Federation Metadata Requests"`
 }
 
-func (c *collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	var adfsData []perflibADFS
 	err := perflib.UnmarshalObject(ctx.PerfObjects["AD FS"], &adfsData, c.logger)
 	if err != nil {

pkg/collector/cache/cache.go

@@ -6,6 +6,7 @@ import (
 	"github.com/alecthomas/kingpin/v2"
 	"github.com/go-kit/log"
 	"github.com/go-kit/log/level"
+	"github.com/pkg/errors"
 	"github.com/prometheus-community/windows_exporter/pkg/perflib"
 	"github.com/prometheus-community/windows_exporter/pkg/types"
 	"github.com/prometheus/client_golang/prometheus"
@@ -17,233 +18,238 @@ type Config struct{}
 
 var ConfigDefaults = Config{}
 
-// A collector is a Prometheus collector for Perflib Cache metrics
-type collector struct {
+// A Collector is a Prometheus Collector for Perflib Cache metrics
+type Collector struct {
 	logger log.Logger
 
-	AsyncCopyReadsTotal         *prometheus.Desc
-	AsyncDataMapsTotal          *prometheus.Desc
-	AsyncFastReadsTotal         *prometheus.Desc
-	AsyncMDLReadsTotal          *prometheus.Desc
-	AsyncPinReadsTotal          *prometheus.Desc
-	CopyReadHitsTotal           *prometheus.Desc
-	CopyReadsTotal              *prometheus.Desc
-	DataFlushesTotal            *prometheus.Desc
-	DataFlushPagesTotal         *prometheus.Desc
-	DataMapHitsPercent          *prometheus.Desc
-	DataMapPinsTotal            *prometheus.Desc
-	DataMapsTotal               *prometheus.Desc
-	DirtyPages                  *prometheus.Desc
-	DirtyPageThreshold          *prometheus.Desc
-	FastReadNotPossiblesTotal   *prometheus.Desc
-	FastReadResourceMissesTotal *prometheus.Desc
-	FastReadsTotal              *prometheus.Desc
-	LazyWriteFlushesTotal       *prometheus.Desc
-	LazyWritePagesTotal         *prometheus.Desc
-	MDLReadHitsTotal            *prometheus.Desc
-	MDLReadsTotal               *prometheus.Desc
-	PinReadHitsTotal            *prometheus.Desc
-	PinReadsTotal               *prometheus.Desc
-	ReadAheadsTotal             *prometheus.Desc
-	SyncCopyReadsTotal          *prometheus.Desc
-	SyncDataMapsTotal           *prometheus.Desc
-	SyncFastReadsTotal          *prometheus.Desc
-	SyncMDLReadsTotal           *prometheus.Desc
-	SyncPinReadsTotal           *prometheus.Desc
+	asyncCopyReadsTotal         *prometheus.Desc
+	asyncDataMapsTotal          *prometheus.Desc
+	asyncFastReadsTotal         *prometheus.Desc
+	asyncMDLReadsTotal          *prometheus.Desc
+	asyncPinReadsTotal          *prometheus.Desc
+	copyReadHitsTotal           *prometheus.Desc
+	copyReadsTotal              *prometheus.Desc
+	dataFlushesTotal            *prometheus.Desc
+	dataFlushPagesTotal         *prometheus.Desc
+	dataMapHitsPercent          *prometheus.Desc
+	dataMapPinsTotal            *prometheus.Desc
+	dataMapsTotal               *prometheus.Desc
+	dirtyPages                  *prometheus.Desc
+	dirtyPageThreshold          *prometheus.Desc
+	fastReadNotPossiblesTotal   *prometheus.Desc
+	fastReadResourceMissesTotal *prometheus.Desc
+	fastReadsTotal              *prometheus.Desc
+	lazyWriteFlushesTotal       *prometheus.Desc
+	lazyWritePagesTotal         *prometheus.Desc
+	mdlReadHitsTotal            *prometheus.Desc
+	mdlReadsTotal               *prometheus.Desc
+	pinReadHitsTotal            *prometheus.Desc
+	pinReadsTotal               *prometheus.Desc
+	readAheadsTotal             *prometheus.Desc
+	syncCopyReadsTotal          *prometheus.Desc
+	syncDataMapsTotal           *prometheus.Desc
+	syncFastReadsTotal          *prometheus.Desc
+	syncMDLReadsTotal           *prometheus.Desc
+	syncPinReadsTotal           *prometheus.Desc
 }
 
-func New(logger log.Logger, _ *Config) types.Collector {
-	c := &collector{}
+func New(logger log.Logger, _ *Config) *Collector {
+	c := &Collector{}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(_ *kingpin.Application) types.Collector {
-	return &collector{}
+func NewWithFlags(_ *kingpin.Application) *Collector {
+	return &Collector{}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{"Cache"}, nil
 }
 
-func (c *collector) Build() error {
-	c.AsyncCopyReadsTotal = prometheus.NewDesc(
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
+	c.asyncCopyReadsTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "async_copy_reads_total"),
 		"(AsyncCopyReadsTotal)",
 		nil,
 		nil,
 	)
-	c.AsyncDataMapsTotal = prometheus.NewDesc(
+	c.asyncDataMapsTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "async_data_maps_total"),
 		"(AsyncDataMapsTotal)",
 		nil,
 		nil,
 	)
-	c.AsyncFastReadsTotal = prometheus.NewDesc(
+	c.asyncFastReadsTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "async_fast_reads_total"),
 		"(AsyncFastReadsTotal)",
 		nil,
 		nil,
 	)
-	c.AsyncMDLReadsTotal = prometheus.NewDesc(
+	c.asyncMDLReadsTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "async_mdl_reads_total"),
 		"(AsyncMDLReadsTotal)",
 		nil,
 		nil,
 	)
-	c.AsyncPinReadsTotal = prometheus.NewDesc(
+	c.asyncPinReadsTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "async_pin_reads_total"),
 		"(AsyncPinReadsTotal)",
 		nil,
 		nil,
 	)
-	c.CopyReadHitsTotal = prometheus.NewDesc(
+	c.copyReadHitsTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "copy_read_hits_total"),
 		"(CopyReadHitsTotal)",
 		nil,
 		nil,
 	)
-	c.CopyReadsTotal = prometheus.NewDesc(
+	c.copyReadsTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "copy_reads_total"),
 		"(CopyReadsTotal)",
 		nil,
 		nil,
 	)
-	c.DataFlushesTotal = prometheus.NewDesc(
+	c.dataFlushesTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "data_flushes_total"),
 		"(DataFlushesTotal)",
 		nil,
 		nil,
 	)
-	c.DataFlushPagesTotal = prometheus.NewDesc(
+	c.dataFlushPagesTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "data_flush_pages_total"),
 		"(DataFlushPagesTotal)",
 		nil,
 		nil,
 	)
-	c.DataMapHitsPercent = prometheus.NewDesc(
+	c.dataMapHitsPercent = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "data_map_hits_percent"),
 		"(DataMapHitsPercent)",
 		nil,
 		nil,
 	)
-	c.DataMapPinsTotal = prometheus.NewDesc(
+	c.dataMapPinsTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "data_map_pins_total"),
 		"(DataMapPinsTotal)",
 		nil,
 		nil,
 	)
-	c.DataMapsTotal = prometheus.NewDesc(
+	c.dataMapsTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "data_maps_total"),
 		"(DataMapsTotal)",
 		nil,
 		nil,
 	)
-	c.DirtyPages = prometheus.NewDesc(
+	c.dirtyPages = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "dirty_pages"),
 		"(DirtyPages)",
 		nil,
 		nil,
 	)
-	c.DirtyPageThreshold = prometheus.NewDesc(
+	c.dirtyPageThreshold = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "dirty_page_threshold"),
 		"(DirtyPageThreshold)",
 		nil,
 		nil,
 	)
-	c.FastReadNotPossiblesTotal = prometheus.NewDesc(
+	c.fastReadNotPossiblesTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "fast_read_not_possibles_total"),
 		"(FastReadNotPossiblesTotal)",
 		nil,
 		nil,
 	)
-	c.FastReadResourceMissesTotal = prometheus.NewDesc(
+	c.fastReadResourceMissesTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "fast_read_resource_misses_total"),
 		"(FastReadResourceMissesTotal)",
 		nil,
 		nil,
 	)
-	c.FastReadsTotal = prometheus.NewDesc(
+	c.fastReadsTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "fast_reads_total"),
 		"(FastReadsTotal)",
 		nil,
 		nil,
 	)
-	c.LazyWriteFlushesTotal = prometheus.NewDesc(
+	c.lazyWriteFlushesTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "lazy_write_flushes_total"),
 		"(LazyWriteFlushesTotal)",
 		nil,
 		nil,
 	)
-	c.LazyWritePagesTotal = prometheus.NewDesc(
+	c.lazyWritePagesTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "lazy_write_pages_total"),
 		"(LazyWritePagesTotal)",
 		nil,
 		nil,
 	)
-	c.MDLReadHitsTotal = prometheus.NewDesc(
+	c.mdlReadHitsTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "mdl_read_hits_total"),
 		"(MDLReadHitsTotal)",
 		nil,
 		nil,
 	)
-	c.MDLReadsTotal = prometheus.NewDesc(
+	c.mdlReadsTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "mdl_reads_total"),
 		"(MDLReadsTotal)",
 		nil,
 		nil,
 	)
-	c.PinReadHitsTotal = prometheus.NewDesc(
+	c.pinReadHitsTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "pin_read_hits_total"),
 		"(PinReadHitsTotal)",
 		nil,
 		nil,
 	)
-	c.PinReadsTotal = prometheus.NewDesc(
+	c.pinReadsTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "pin_reads_total"),
 		"(PinReadsTotal)",
 		nil,
 		nil,
 	)
-	c.ReadAheadsTotal = prometheus.NewDesc(
+	c.readAheadsTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "read_aheads_total"),
 		"(ReadAheadsTotal)",
 		nil,
 		nil,
 	)
-	c.SyncCopyReadsTotal = prometheus.NewDesc(
+	c.syncCopyReadsTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "sync_copy_reads_total"),
 		"(SyncCopyReadsTotal)",
 		nil,
 		nil,
 	)
-	c.SyncDataMapsTotal = prometheus.NewDesc(
+	c.syncDataMapsTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "sync_data_maps_total"),
 		"(SyncDataMapsTotal)",
 		nil,
 		nil,
 	)
-	c.SyncFastReadsTotal = prometheus.NewDesc(
+	c.syncFastReadsTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "sync_fast_reads_total"),
 		"(SyncFastReadsTotal)",
 		nil,
 		nil,
 	)
-	c.SyncMDLReadsTotal = prometheus.NewDesc(
+	c.syncMDLReadsTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "sync_mdl_reads_total"),
 		"(SyncMDLReadsTotal)",
 		nil,
 		nil,
 	)
-	c.SyncPinReadsTotal = prometheus.NewDesc(
+	c.syncPinReadsTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "sync_pin_reads_total"),
 		"(SyncPinReadsTotal)",
 		nil,
@@ -253,11 +259,13 @@ func (c *collector) Build() error {
 }
 
 // Collect implements the Collector interface
-func (c *collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	if err := c.collect(ctx, ch); err != nil {
 		_ = level.Error(c.logger).Log("msg", "failed collecting cache metrics", "err", err)
+
 		return err
 	}
+
 	return nil
 }
 
@@ -269,23 +277,20 @@ type perflibCache struct {
 	AsyncFastReadsTotal         float64 `perflib:"Async Fast Reads/sec"`
 	AsyncMDLReadsTotal          float64 `perflib:"Async MDL Reads/sec"`
 	AsyncPinReadsTotal          float64 `perflib:"Async Pin Reads/sec"`
-	CopyReadHitsTotal           float64 `perflib:"Copy Read Hits %"`
+	CopyReadHitsTotal           float64 `perflib:"Copy Read Hits/sec"`
 	CopyReadsTotal              float64 `perflib:"Copy Reads/sec"`
 	DataFlushesTotal            float64 `perflib:"Data Flushes/sec"`
 	DataFlushPagesTotal         float64 `perflib:"Data Flush Pages/sec"`
-	DataMapHitsPercent          float64 `perflib:"Data Map Hits %"`
 	DataMapPinsTotal            float64 `perflib:"Data Map Pins/sec"`
 	DataMapsTotal               float64 `perflib:"Data Maps/sec"`
-	DirtyPages                  float64 `perflib:"Dirty Pages"`
-	DirtyPageThreshold          float64 `perflib:"Dirty Page Threshold"`
 	FastReadNotPossiblesTotal   float64 `perflib:"Fast Read Not Possibles/sec"`
 	FastReadResourceMissesTotal float64 `perflib:"Fast Read Resource Misses/sec"`
 	FastReadsTotal              float64 `perflib:"Fast Reads/sec"`
 	LazyWriteFlushesTotal       float64 `perflib:"Lazy Write Flushes/sec"`
 	LazyWritePagesTotal         float64 `perflib:"Lazy Write Pages/sec"`
-	MDLReadHitsTotal            float64 `perflib:"MDL Read Hits %"`
+	MDLReadHitsTotal            float64 `perflib:"MDL Read Hits/sec"`
 	MDLReadsTotal               float64 `perflib:"MDL Reads/sec"`
-	PinReadHitsTotal            float64 `perflib:"Pin Read Hits %"`
+	PinReadHitsTotal            float64 `perflib:"Pin Read Hits/sec"`
 	PinReadsTotal               float64 `perflib:"Pin Reads/sec"`
 	ReadAheadsTotal             float64 `perflib:"Read Aheads/sec"`
 	SyncCopyReadsTotal          float64 `perflib:"Sync Copy Reads/sec"`
@@ -293,187 +298,166 @@ type perflibCache struct {
 	SyncFastReadsTotal          float64 `perflib:"Sync Fast Reads/sec"`
 	SyncMDLReadsTotal           float64 `perflib:"Sync MDL Reads/sec"`
 	SyncPinReadsTotal           float64 `perflib:"Sync Pin Reads/sec"`
+	DirtyPages                  float64 `perflib:"Dirty Pages"`
+	DirtyPageThreshold          float64 `perflib:"Dirty Page Threshold"`
+	DataMapHitsPercent          float64 `perflib:"Data Map Hits %"`
 }
 
-func (c *collector) collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	var dst []perflibCache // Single-instance class, array is required but will have single entry.
 	if err := perflib.UnmarshalObject(ctx.PerfObjects["Cache"], &dst, c.logger); err != nil {
 		return err
 	}
 
+	if len(dst) != 1 {
+		return errors.New("expected single instance of Cache")
+	}
+
 	ch <- prometheus.MustNewConstMetric(
-		c.AsyncCopyReadsTotal,
+		c.asyncCopyReadsTotal,
 		prometheus.CounterValue,
 		dst[0].AsyncCopyReadsTotal,
 	)
-
 	ch <- prometheus.MustNewConstMetric(
-		c.AsyncDataMapsTotal,
+		c.asyncDataMapsTotal,
 		prometheus.CounterValue,
 		dst[0].AsyncDataMapsTotal,
 	)
-
 	ch <- prometheus.MustNewConstMetric(
-		c.AsyncFastReadsTotal,
+		c.asyncFastReadsTotal,
 		prometheus.CounterValue,
 		dst[0].AsyncFastReadsTotal,
 	)
-
 	ch <- prometheus.MustNewConstMetric(
-		c.AsyncMDLReadsTotal,
+		c.asyncMDLReadsTotal,
 		prometheus.CounterValue,
 		dst[0].AsyncMDLReadsTotal,
 	)
-
 	ch <- prometheus.MustNewConstMetric(
-		c.AsyncPinReadsTotal,
+		c.asyncPinReadsTotal,
 		prometheus.CounterValue,
 		dst[0].AsyncPinReadsTotal,
 	)
-
 	ch <- prometheus.MustNewConstMetric(
-		c.CopyReadHitsTotal,
-		prometheus.GaugeValue,
+		c.copyReadHitsTotal,
+		prometheus.CounterValue,
 		dst[0].CopyReadHitsTotal,
 	)
-
 	ch <- prometheus.MustNewConstMetric(
-		c.CopyReadsTotal,
+		c.copyReadsTotal,
 		prometheus.CounterValue,
 		dst[0].CopyReadsTotal,
 	)
-
 	ch <- prometheus.MustNewConstMetric(
-		c.DataFlushesTotal,
+		c.dataFlushesTotal,
 		prometheus.CounterValue,
 		dst[0].DataFlushesTotal,
 	)
-
 	ch <- prometheus.MustNewConstMetric(
-		c.DataFlushPagesTotal,
+		c.dataFlushPagesTotal,
 		prometheus.CounterValue,
 		dst[0].DataFlushPagesTotal,
 	)
-
 	ch <- prometheus.MustNewConstMetric(
-		c.DataMapHitsPercent,
+		c.dataMapPinsTotal,
+		prometheus.CounterValue,
+		dst[0].DataMapPinsTotal,
+	)
+	ch <- prometheus.MustNewConstMetric(
+		c.dataMapsTotal,
+		prometheus.CounterValue,
+		dst[0].DataMapsTotal,
+	)
+	ch <- prometheus.MustNewConstMetric(
+		c.fastReadNotPossiblesTotal,
+		prometheus.CounterValue,
+		dst[0].FastReadNotPossiblesTotal,
+	)
+	ch <- prometheus.MustNewConstMetric(
+		c.fastReadResourceMissesTotal,
+		prometheus.CounterValue,
+		dst[0].FastReadResourceMissesTotal,
+	)
+	ch <- prometheus.MustNewConstMetric(
+		c.fastReadsTotal,
+		prometheus.CounterValue,
+		dst[0].FastReadsTotal,
+	)
+	ch <- prometheus.MustNewConstMetric(
+		c.lazyWriteFlushesTotal,
+		prometheus.CounterValue,
+		dst[0].LazyWriteFlushesTotal,
+	)
+	ch <- prometheus.MustNewConstMetric(
+		c.lazyWritePagesTotal,
+		prometheus.CounterValue,
+		dst[0].LazyWritePagesTotal,
+	)
+	ch <- prometheus.MustNewConstMetric(
+		c.mdlReadHitsTotal,
+		prometheus.CounterValue,
+		dst[0].MDLReadHitsTotal,
+	)
+	ch <- prometheus.MustNewConstMetric(
+		c.mdlReadsTotal,
+		prometheus.CounterValue,
+		dst[0].MDLReadsTotal,
+	)
+	ch <- prometheus.MustNewConstMetric(
+		c.pinReadHitsTotal,
+		prometheus.CounterValue,
+		dst[0].PinReadHitsTotal,
+	)
+	ch <- prometheus.MustNewConstMetric(
+		c.pinReadsTotal,
+		prometheus.CounterValue,
+		dst[0].PinReadsTotal,
+	)
+	ch <- prometheus.MustNewConstMetric(
+		c.readAheadsTotal,
+		prometheus.CounterValue,
+		dst[0].ReadAheadsTotal,
+	)
+	ch <- prometheus.MustNewConstMetric(
+		c.syncCopyReadsTotal,
+		prometheus.CounterValue,
+		dst[0].SyncCopyReadsTotal,
+	)
+	ch <- prometheus.MustNewConstMetric(
+		c.syncDataMapsTotal,
+		prometheus.CounterValue,
+		dst[0].SyncDataMapsTotal,
+	)
+	ch <- prometheus.MustNewConstMetric(
+		c.syncFastReadsTotal,
+		prometheus.CounterValue,
+		dst[0].SyncFastReadsTotal,
+	)
+	ch <- prometheus.MustNewConstMetric(
+		c.syncMDLReadsTotal,
+		prometheus.CounterValue,
+		dst[0].SyncMDLReadsTotal,
+	)
+	ch <- prometheus.MustNewConstMetric(
+		c.syncPinReadsTotal,
+		prometheus.CounterValue,
+		dst[0].SyncPinReadsTotal,
+	)
+	ch <- prometheus.MustNewConstMetric(
+		c.dirtyPages,
+		prometheus.GaugeValue,
+		dst[0].DirtyPages,
+	)
+	ch <- prometheus.MustNewConstMetric(
+		c.dirtyPageThreshold,
+		prometheus.GaugeValue,
+		dst[0].DirtyPageThreshold,
+	)
+	ch <- prometheus.MustNewConstMetric(
+		c.dataMapHitsPercent,
 		prometheus.GaugeValue,
 		dst[0].DataMapHitsPercent,
 	)
 
-	ch <- prometheus.MustNewConstMetric(
-		c.DataMapPinsTotal,
-		prometheus.CounterValue,
-		dst[0].DataMapPinsTotal,
-	)
-
-	ch <- prometheus.MustNewConstMetric(
-		c.DataMapsTotal,
-		prometheus.CounterValue,
-		dst[0].DataMapsTotal,
-	)
-
-	ch <- prometheus.MustNewConstMetric(
-		c.DirtyPages,
-		prometheus.GaugeValue,
-		dst[0].DirtyPages,
-	)
-
-	ch <- prometheus.MustNewConstMetric(
-		c.DirtyPageThreshold,
-		prometheus.GaugeValue,
-		dst[0].DirtyPageThreshold,
-	)
-
-	ch <- prometheus.MustNewConstMetric(
-		c.FastReadNotPossiblesTotal,
-		prometheus.CounterValue,
-		dst[0].FastReadNotPossiblesTotal,
-	)
-
-	ch <- prometheus.MustNewConstMetric(
-		c.FastReadResourceMissesTotal,
-		prometheus.CounterValue,
-		dst[0].FastReadResourceMissesTotal,
-	)
-
-	ch <- prometheus.MustNewConstMetric(
-		c.FastReadsTotal,
-		prometheus.CounterValue,
-		dst[0].FastReadsTotal,
-	)
-
-	ch <- prometheus.MustNewConstMetric(
-		c.LazyWriteFlushesTotal,
-		prometheus.CounterValue,
-		dst[0].LazyWriteFlushesTotal,
-	)
-
-	ch <- prometheus.MustNewConstMetric(
-		c.LazyWritePagesTotal,
-		prometheus.CounterValue,
-		dst[0].LazyWritePagesTotal,
-	)
-
-	ch <- prometheus.MustNewConstMetric(
-		c.MDLReadHitsTotal,
-		prometheus.CounterValue,
-		dst[0].MDLReadHitsTotal,
-	)
-
-	ch <- prometheus.MustNewConstMetric(
-		c.MDLReadsTotal,
-		prometheus.CounterValue,
-		dst[0].MDLReadsTotal,
-	)
-
-	ch <- prometheus.MustNewConstMetric(
-		c.PinReadHitsTotal,
-		prometheus.CounterValue,
-		dst[0].PinReadHitsTotal,
-	)
-
-	ch <- prometheus.MustNewConstMetric(
-		c.PinReadsTotal,
-		prometheus.CounterValue,
-		dst[0].PinReadsTotal,
-	)
-
-	ch <- prometheus.MustNewConstMetric(
-		c.ReadAheadsTotal,
-		prometheus.CounterValue,
-		dst[0].ReadAheadsTotal,
-	)
-
-	ch <- prometheus.MustNewConstMetric(
-		c.SyncCopyReadsTotal,
-		prometheus.CounterValue,
-		dst[0].SyncCopyReadsTotal,
-	)
-
-	ch <- prometheus.MustNewConstMetric(
-		c.SyncDataMapsTotal,
-		prometheus.CounterValue,
-		dst[0].SyncDataMapsTotal,
-	)
-
-	ch <- prometheus.MustNewConstMetric(
-		c.SyncFastReadsTotal,
-		prometheus.CounterValue,
-		dst[0].SyncFastReadsTotal,
-	)
-
-	ch <- prometheus.MustNewConstMetric(
-		c.SyncMDLReadsTotal,
-		prometheus.CounterValue,
-		dst[0].SyncMDLReadsTotal,
-	)
-
-	ch <- prometheus.MustNewConstMetric(
-		c.SyncPinReadsTotal,
-		prometheus.CounterValue,
-		dst[0].SyncPinReadsTotal,
-	)
-
 	return nil
 }

pkg/collector/cache/cache_test.go

@@ -0,0 +1,12 @@
+package cache_test
+
+import (
+	"testing"
+
+	"github.com/prometheus-community/windows_exporter/pkg/collector/cache"
+	"github.com/prometheus-community/windows_exporter/pkg/testutils"
+)
+
+func BenchmarkCollector(b *testing.B) {
+	testutils.FuncBenchmarkCollector(b, cache.Name, cache.NewWithFlags)
+}

pkg/collector/collector.go

@@ -3,12 +3,12 @@
 package collector
 
 import (
+	"errors"
 	"slices"
 	"strings"
 
 	"github.com/alecthomas/kingpin/v2"
 	"github.com/go-kit/log"
-
 	"github.com/prometheus-community/windows_exporter/pkg/collector/ad"
 	"github.com/prometheus-community/windows_exporter/pkg/collector/adcs"
 	"github.com/prometheus-community/windows_exporter/pkg/collector/adfs"
@@ -22,6 +22,7 @@ import (
 	"github.com/prometheus-community/windows_exporter/pkg/collector/diskdrive"
 	"github.com/prometheus-community/windows_exporter/pkg/collector/dns"
 	"github.com/prometheus-community/windows_exporter/pkg/collector/exchange"
+	"github.com/prometheus-community/windows_exporter/pkg/collector/fsrmquota"
 	"github.com/prometheus-community/windows_exporter/pkg/collector/hyperv"
 	"github.com/prometheus-community/windows_exporter/pkg/collector/iis"
 	"github.com/prometheus-community/windows_exporter/pkg/collector/license"
@@ -68,45 +69,44 @@ import (
 	"github.com/prometheus-community/windows_exporter/pkg/types"
 )
 
-type Collectors struct {
-	logger log.Logger
-
-	collectors       map[string]types.Collector
-	perfCounterQuery string
-}
-
 // NewWithFlags To be called by the exporter for collector initialization before running kingpin.Parse
 func NewWithFlags(app *kingpin.Application) Collectors {
-	collectors := map[string]types.Collector{}
+	collectors := map[string]Collector{}
 
-	for name, builder := range Map {
+	for name, builder := range BuildersWithFlags {
 		collectors[name] = builder(app)
 	}
 
 	return New(collectors)
 }
 
+func NewBuilderWithFlags[C Collector](fn BuilderWithFlags[C]) BuilderWithFlags[Collector] {
+	return func(app *kingpin.Application) Collector {
+		return fn(app)
+	}
+}
+
 // NewWithConfig To be called by the external libraries for collector initialization without running kingpin.Parse
 //
 //goland:noinspection GoUnusedExportedFunction
 func NewWithConfig(logger log.Logger, config Config) Collectors {
-	collectors := map[string]types.Collector{}
-	collectors[ad.Name] = ad.New(logger, &config.Ad)
-	collectors[adcs.Name] = adcs.New(logger, &config.Adcs)
-	collectors[adfs.Name] = adfs.New(logger, &config.Adfs)
+	collectors := map[string]Collector{}
+	collectors[ad.Name] = ad.New(logger, &config.AD)
+	collectors[adcs.Name] = adcs.New(logger, &config.ADCS)
+	collectors[adfs.Name] = adfs.New(logger, &config.ADFS)
 	collectors[cache.Name] = cache.New(logger, &config.Cache)
 	collectors[container.Name] = container.New(logger, &config.Container)
-	collectors[cpu.Name] = cpu.New(logger, &config.Cpu)
-	collectors[cpu_info.Name] = cpu_info.New(logger, &config.CpuInfo)
+	collectors[cpu.Name] = cpu.New(logger, &config.CPU)
+	collectors[cpu_info.Name] = cpu_info.New(logger, &config.CPUInfo)
 	collectors[cs.Name] = cs.New(logger, &config.Cs)
-	collectors[dfsr.Name] = dfsr.New(logger, &config.Dfsr)
+	collectors[dfsr.Name] = dfsr.New(logger, &config.DFSR)
 	collectors[dhcp.Name] = dhcp.New(logger, &config.Dhcp)
-	collectors[diskdrive.Name] = diskdrive.New(logger, &config.Diskdrive)
-	collectors[dns.Name] = dns.New(logger, &config.Dns)
+	collectors[diskdrive.Name] = diskdrive.New(logger, &config.DiskDrive)
+	collectors[dns.Name] = dns.New(logger, &config.DNS)
 	collectors[exchange.Name] = exchange.New(logger, &config.Exchange)
-	collectors[exchange.Name] = exchange.New(logger, &config.Fsrmquota)
+	collectors[fsrmquota.Name] = fsrmquota.New(logger, &config.Fsrmquota)
 	collectors[hyperv.Name] = hyperv.New(logger, &config.Hyperv)
-	collectors[iis.Name] = iis.New(logger, &config.Iis)
+	collectors[iis.Name] = iis.New(logger, &config.IIS)
 	collectors[license.Name] = license.New(logger, &config.License)
 	collectors[logical_disk.Name] = logical_disk.New(logger, &config.LogicalDisk)
 	collectors[logon.Name] = logon.New(logger, &config.Logon)
@@ -135,12 +135,12 @@ func NewWithConfig(logger log.Logger, config Config) Collectors {
 	collectors[remote_fx.Name] = remote_fx.New(logger, &config.RemoteFx)
 	collectors[scheduled_task.Name] = scheduled_task.New(logger, &config.ScheduledTask)
 	collectors[service.Name] = service.New(logger, &config.Service)
-	collectors[smb.Name] = smb.New(logger, &config.Smb)
-	collectors[smbclient.Name] = smbclient.New(logger, &config.SmbClient)
-	collectors[smtp.Name] = smtp.New(logger, &config.Smtp)
+	collectors[smb.Name] = smb.New(logger, &config.SMB)
+	collectors[smbclient.Name] = smbclient.New(logger, &config.SMBClient)
+	collectors[smtp.Name] = smtp.New(logger, &config.SMTP)
 	collectors[system.Name] = system.New(logger, &config.System)
 	collectors[teradici_pcoip.Name] = teradici_pcoip.New(logger, &config.TeradiciPcoip)
-	collectors[tcp.Name] = tcp.New(logger, &config.Tcp)
+	collectors[tcp.Name] = tcp.New(logger, &config.TCP)
 	collectors[terminal_services.Name] = terminal_services.New(logger, &config.TerminalServices)
 	collectors[textfile.Name] = textfile.New(logger, &config.Textfile)
 	collectors[thermalzone.Name] = thermalzone.New(logger, &config.Thermalzone)
@@ -151,8 +151,8 @@ func NewWithConfig(logger log.Logger, config Config) Collectors {
 	return New(collectors)
 }
 
-// New To be called by the external libraries for collector initialization
-func New(collectors map[string]types.Collector) Collectors {
+// New To be called by the external libraries for collector initialization.
+func New(collectors Map) Collectors {
 	return Collectors{
 		collectors: collectors,
 	}
@@ -207,6 +207,7 @@ func (c *Collectors) Enable(enabledCollectors []string) {
 // Build To be called by the exporter for collector initialization
 func (c *Collectors) Build() error {
 	var err error
+
 	for _, collector := range c.collectors {
 		if err = collector.Build(); err != nil {
 			return err
@@ -225,3 +226,16 @@ func (c *Collectors) PrepareScrapeContext() (*types.ScrapeContext, error) {
 
 	return &types.ScrapeContext{PerfObjects: objs}, nil
 }
+
+// Close To be called by the exporter for collector cleanup
+func (c *Collectors) Close() error {
+	errs := make([]error, 0, len(c.collectors))
+
+	for _, collector := range c.collectors {
+		if err := collector.Build(); err != nil {
+			errs = append(errs, err)
+		}
+	}
+
+	return errors.Join(errs...)
+}

pkg/collector/config.go

@@ -14,6 +14,7 @@ import (
 	"github.com/prometheus-community/windows_exporter/pkg/collector/diskdrive"
 	"github.com/prometheus-community/windows_exporter/pkg/collector/dns"
 	"github.com/prometheus-community/windows_exporter/pkg/collector/exchange"
+	"github.com/prometheus-community/windows_exporter/pkg/collector/fsrmquota"
 	"github.com/prometheus-community/windows_exporter/pkg/collector/hyperv"
 	"github.com/prometheus-community/windows_exporter/pkg/collector/iis"
 	"github.com/prometheus-community/windows_exporter/pkg/collector/license"
@@ -59,22 +60,22 @@ import (
 )
 
 type Config struct {
-	Ad                             ad.Config                              `yaml:"ad"`
-	Adcs                           adcs.Config                            `yaml:"adcs"`
-	Adfs                           adfs.Config                            `yaml:"adfs"`
+	AD                             ad.Config                              `yaml:"ad"`
+	ADCS                           adcs.Config                            `yaml:"adcs"`
+	ADFS                           adfs.Config                            `yaml:"adfs"`
 	Cache                          cache.Config                           `yaml:"cache"`
 	Container                      container.Config                       `yaml:"container"`
-	Cpu                            cpu.Config                             `yaml:"cpu"`
-	CpuInfo                        cpu_info.Config                        `yaml:"cpu_info"`
+	CPU                            cpu.Config                             `yaml:"cpu"`
+	CPUInfo                        cpu_info.Config                        `yaml:"cpu_info"`
 	Cs                             cs.Config                              `yaml:"cs"`
-	Dfsr                           dfsr.Config                            `yaml:"dfsr"`
+	DFSR                           dfsr.Config                            `yaml:"dfsr"`
 	Dhcp                           dhcp.Config                            `yaml:"dhcp"`
-	Diskdrive                      diskdrive.Config                       `yaml:"diskdrive"`
-	Dns                            dns.Config                             `yaml:"dns"`
+	DiskDrive                      diskdrive.Config                       `yaml:"diskdrive"`
+	DNS                            dns.Config                             `yaml:"dns"`
 	Exchange                       exchange.Config                        `yaml:"exchange"`
-	Fsrmquota                      exchange.Config                        `yaml:"fsrmquota"`
+	Fsrmquota                      fsrmquota.Config                       `yaml:"fsrmquota"`
 	Hyperv                         hyperv.Config                          `yaml:"hyperv"`
-	Iis                            iis.Config                             `yaml:"iis"`
+	IIS                            iis.Config                             `yaml:"iis"`
 	License                        license.Config                         `yaml:"license"`
 	LogicalDisk                    logical_disk.Config                    `yaml:"logical_disk"`
 	Logon                          logon.Config                           `yaml:"logon"`
@@ -103,12 +104,12 @@ type Config struct {
 	RemoteFx                       remote_fx.Config                       `yaml:"remote_fx"`
 	ScheduledTask                  scheduled_task.Config                  `yaml:"scheduled_task"`
 	Service                        service.Config                         `yaml:"service"`
-	Smb                            smb.Config                             `yaml:"smb"`
-	SmbClient                      smbclient.Config                       `yaml:"smbclient"`
-	Smtp                           smtp.Config                            `yaml:"smtp"`
+	SMB                            smb.Config                             `yaml:"smb"`
+	SMBClient                      smbclient.Config                       `yaml:"smbclient"`
+	SMTP                           smtp.Config                            `yaml:"smtp"`
 	System                         system.Config                          `yaml:"system"`
 	TeradiciPcoip                  teradici_pcoip.Config                  `yaml:"teradici_pcoip"`
-	Tcp                            tcp.Config                             `yaml:"tcp"`
+	TCP                            tcp.Config                             `yaml:"tcp"`
 	TerminalServices               terminal_services.Config               `yaml:"terminal_services"`
 	Textfile                       textfile.Config                        `yaml:"textfile"`
 	Thermalzone                    thermalzone.Config                     `yaml:"thermalzone"`
@@ -121,22 +122,22 @@ type Config struct {
 //
 //goland:noinspection GoUnusedGlobalVariable
 var ConfigDefaults = Config{
-	Ad:                             ad.ConfigDefaults,
-	Adcs:                           adcs.ConfigDefaults,
-	Adfs:                           adfs.ConfigDefaults,
+	AD:                             ad.ConfigDefaults,
+	ADCS:                           adcs.ConfigDefaults,
+	ADFS:                           adfs.ConfigDefaults,
 	Cache:                          cache.ConfigDefaults,
 	Container:                      container.ConfigDefaults,
-	Cpu:                            cpu.ConfigDefaults,
-	CpuInfo:                        cpu_info.ConfigDefaults,
+	CPU:                            cpu.ConfigDefaults,
+	CPUInfo:                        cpu_info.ConfigDefaults,
 	Cs:                             cs.ConfigDefaults,
-	Dfsr:                           dfsr.ConfigDefaults,
+	DFSR:                           dfsr.ConfigDefaults,
 	Dhcp:                           dhcp.ConfigDefaults,
-	Diskdrive:                      diskdrive.ConfigDefaults,
-	Dns:                            dns.ConfigDefaults,
+	DiskDrive:                      diskdrive.ConfigDefaults,
+	DNS:                            dns.ConfigDefaults,
 	Exchange:                       exchange.ConfigDefaults,
-	Fsrmquota:                      exchange.ConfigDefaults,
+	Fsrmquota:                      fsrmquota.ConfigDefaults,
 	Hyperv:                         hyperv.ConfigDefaults,
-	Iis:                            iis.ConfigDefaults,
+	IIS:                            iis.ConfigDefaults,
 	License:                        license.ConfigDefaults,
 	LogicalDisk:                    logical_disk.ConfigDefaults,
 	Logon:                          logon.ConfigDefaults,
@@ -165,12 +166,12 @@ var ConfigDefaults = Config{
 	RemoteFx:                       remote_fx.ConfigDefaults,
 	ScheduledTask:                  scheduled_task.ConfigDefaults,
 	Service:                        service.ConfigDefaults,
-	Smb:                            smb.ConfigDefaults,
-	SmbClient:                      smbclient.ConfigDefaults,
-	Smtp:                           smtp.ConfigDefaults,
+	SMB:                            smb.ConfigDefaults,
+	SMBClient:                      smbclient.ConfigDefaults,
+	SMTP:                           smtp.ConfigDefaults,
 	System:                         system.ConfigDefaults,
 	TeradiciPcoip:                  teradici_pcoip.ConfigDefaults,
-	Tcp:                            tcp.ConfigDefaults,
+	TCP:                            tcp.ConfigDefaults,
 	TerminalServices:               terminal_services.ConfigDefaults,
 	Textfile:                       textfile.ConfigDefaults,
 	Thermalzone:                    thermalzone.ConfigDefaults,

pkg/collector/container/container.go

@@ -20,167 +20,173 @@ type Config struct{}
 
 var ConfigDefaults = Config{}
 
-// A collector is a Prometheus collector for containers metrics
-type collector struct {
+// A Collector is a Prometheus Collector for containers metrics
+type Collector struct {
 	logger log.Logger
 
 	// Presence
-	ContainerAvailable *prometheus.Desc
+	containerAvailable *prometheus.Desc
 
 	// Number of containers
-	ContainersCount *prometheus.Desc
-	// memory
-	UsageCommitBytes            *prometheus.Desc
-	UsageCommitPeakBytes        *prometheus.Desc
-	UsagePrivateWorkingSetBytes *prometheus.Desc
+	containersCount *prometheus.Desc
+
+	// Memory
+	usageCommitBytes            *prometheus.Desc
+	usageCommitPeakBytes        *prometheus.Desc
+	usagePrivateWorkingSetBytes *prometheus.Desc
 
 	// CPU
-	RuntimeTotal  *prometheus.Desc
-	RuntimeUser   *prometheus.Desc
-	RuntimeKernel *prometheus.Desc
+	runtimeTotal  *prometheus.Desc
+	runtimeUser   *prometheus.Desc
+	runtimeKernel *prometheus.Desc
 
 	// Network
-	BytesReceived          *prometheus.Desc
-	BytesSent              *prometheus.Desc
-	PacketsReceived        *prometheus.Desc
-	PacketsSent            *prometheus.Desc
-	DroppedPacketsIncoming *prometheus.Desc
-	DroppedPacketsOutgoing *prometheus.Desc
+	bytesReceived          *prometheus.Desc
+	bytesSent              *prometheus.Desc
+	packetsReceived        *prometheus.Desc
+	packetsSent            *prometheus.Desc
+	droppedPacketsIncoming *prometheus.Desc
+	droppedPacketsOutgoing *prometheus.Desc
 
 	// Storage
-	ReadCountNormalized  *prometheus.Desc
-	ReadSizeBytes        *prometheus.Desc
-	WriteCountNormalized *prometheus.Desc
-	WriteSizeBytes       *prometheus.Desc
+	readCountNormalized  *prometheus.Desc
+	readSizeBytes        *prometheus.Desc
+	writeCountNormalized *prometheus.Desc
+	writeSizeBytes       *prometheus.Desc
 }
 
-// New constructs a new collector
-func New(logger log.Logger, _ *Config) types.Collector {
-	c := &collector{}
+// New constructs a new Collector
+func New(logger log.Logger, _ *Config) *Collector {
+	c := &Collector{}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(_ *kingpin.Application) types.Collector {
-	return &collector{}
+func NewWithFlags(_ *kingpin.Application) *Collector {
+	return &Collector{}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{}, nil
 }
 
-func (c *collector) Build() error {
-	c.ContainerAvailable = prometheus.NewDesc(
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
+	c.containerAvailable = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "available"),
 		"Available",
 		[]string{"container_id"},
 		nil,
 	)
-	c.ContainersCount = prometheus.NewDesc(
+	c.containersCount = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "count"),
 		"Number of containers",
 		nil,
 		nil,
 	)
-	c.UsageCommitBytes = prometheus.NewDesc(
+	c.usageCommitBytes = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "memory_usage_commit_bytes"),
 		"Memory Usage Commit Bytes",
 		[]string{"container_id"},
 		nil,
 	)
-	c.UsageCommitPeakBytes = prometheus.NewDesc(
+	c.usageCommitPeakBytes = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "memory_usage_commit_peak_bytes"),
 		"Memory Usage Commit Peak Bytes",
 		[]string{"container_id"},
 		nil,
 	)
-	c.UsagePrivateWorkingSetBytes = prometheus.NewDesc(
+	c.usagePrivateWorkingSetBytes = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "memory_usage_private_working_set_bytes"),
 		"Memory Usage Private Working Set Bytes",
 		[]string{"container_id"},
 		nil,
 	)
-	c.RuntimeTotal = prometheus.NewDesc(
+	c.runtimeTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "cpu_usage_seconds_total"),
 		"Total Run time in Seconds",
 		[]string{"container_id"},
 		nil,
 	)
-	c.RuntimeUser = prometheus.NewDesc(
+	c.runtimeUser = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "cpu_usage_seconds_usermode"),
 		"Run Time in User mode in Seconds",
 		[]string{"container_id"},
 		nil,
 	)
-	c.RuntimeKernel = prometheus.NewDesc(
+	c.runtimeKernel = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "cpu_usage_seconds_kernelmode"),
 		"Run time in Kernel mode in Seconds",
 		[]string{"container_id"},
 		nil,
 	)
-	c.BytesReceived = prometheus.NewDesc(
+	c.bytesReceived = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "network_receive_bytes_total"),
 		"Bytes Received on Interface",
 		[]string{"container_id", "interface"},
 		nil,
 	)
-	c.BytesSent = prometheus.NewDesc(
+	c.bytesSent = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "network_transmit_bytes_total"),
 		"Bytes Sent on Interface",
 		[]string{"container_id", "interface"},
 		nil,
 	)
-	c.PacketsReceived = prometheus.NewDesc(
+	c.packetsReceived = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "network_receive_packets_total"),
 		"Packets Received on Interface",
 		[]string{"container_id", "interface"},
 		nil,
 	)
-	c.PacketsSent = prometheus.NewDesc(
+	c.packetsSent = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "network_transmit_packets_total"),
 		"Packets Sent on Interface",
 		[]string{"container_id", "interface"},
 		nil,
 	)
-	c.DroppedPacketsIncoming = prometheus.NewDesc(
+	c.droppedPacketsIncoming = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "network_receive_packets_dropped_total"),
 		"Dropped Incoming Packets on Interface",
 		[]string{"container_id", "interface"},
 		nil,
 	)
-	c.DroppedPacketsOutgoing = prometheus.NewDesc(
+	c.droppedPacketsOutgoing = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "network_transmit_packets_dropped_total"),
 		"Dropped Outgoing Packets on Interface",
 		[]string{"container_id", "interface"},
 		nil,
 	)
-	c.ReadCountNormalized = prometheus.NewDesc(
+	c.readCountNormalized = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "storage_read_count_normalized_total"),
 		"Read Count Normalized",
 		[]string{"container_id"},
 		nil,
 	)
-	c.ReadSizeBytes = prometheus.NewDesc(
+	c.readSizeBytes = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "storage_read_size_bytes_total"),
 		"Read Size Bytes",
 		[]string{"container_id"},
 		nil,
 	)
-	c.WriteCountNormalized = prometheus.NewDesc(
+	c.writeCountNormalized = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "storage_write_count_normalized_total"),
 		"Write Count Normalized",
 		[]string{"container_id"},
 		nil,
 	)
-	c.WriteSizeBytes = prometheus.NewDesc(
+	c.writeSizeBytes = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "storage_write_size_bytes_total"),
 		"Write Size Bytes",
 		[]string{"container_id"},
@@ -191,7 +197,7 @@ func (c *collector) Build() error {
 
 // Collect sends the metric values for each metric
 // to the provided prometheus Metric channel.
-func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	if err := c.collect(ch); err != nil {
 		_ = level.Error(c.logger).Log("msg", "failed collecting collector metrics", "err", err)
 		return err
@@ -200,14 +206,14 @@ func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric)
 }
 
 // containerClose closes the container resource
-func (c *collector) containerClose(container hcsshim.Container) {
+func (c *Collector) containerClose(container hcsshim.Container) {
 	err := container.Close()
 	if err != nil {
 		_ = level.Error(c.logger).Log("err", err)
 	}
 }
 
-func (c *collector) collect(ch chan<- prometheus.Metric) error {
+func (c *Collector) collect(ch chan<- prometheus.Metric) error {
 	// Types Container is passed to get the containers compute systems only
 	containers, err := hcsshim.GetContainers(hcsshim.ComputeSystemQuery{Types: []string{"Container"}})
 	if err != nil {
@@ -218,7 +224,7 @@ func (c *collector) collect(ch chan<- prometheus.Metric) error {
 	count := len(containers)
 
 	ch <- prometheus.MustNewConstMetric(
-		c.ContainersCount,
+		c.containersCount,
 		prometheus.GaugeValue,
 		float64(count),
 	)
@@ -250,67 +256,67 @@ func (c *collector) collect(ch chan<- prometheus.Metric) error {
 			containerPrefixes[containerDetails.ID] = containerIdWithPrefix
 
 			ch <- prometheus.MustNewConstMetric(
-				c.ContainerAvailable,
+				c.containerAvailable,
 				prometheus.CounterValue,
 				1,
 				containerIdWithPrefix,
 			)
 			ch <- prometheus.MustNewConstMetric(
-				c.UsageCommitBytes,
+				c.usageCommitBytes,
 				prometheus.GaugeValue,
 				float64(cstats.Memory.UsageCommitBytes),
 				containerIdWithPrefix,
 			)
 			ch <- prometheus.MustNewConstMetric(
-				c.UsageCommitPeakBytes,
+				c.usageCommitPeakBytes,
 				prometheus.GaugeValue,
 				float64(cstats.Memory.UsageCommitPeakBytes),
 				containerIdWithPrefix,
 			)
 			ch <- prometheus.MustNewConstMetric(
-				c.UsagePrivateWorkingSetBytes,
+				c.usagePrivateWorkingSetBytes,
 				prometheus.GaugeValue,
 				float64(cstats.Memory.UsagePrivateWorkingSetBytes),
 				containerIdWithPrefix,
 			)
 			ch <- prometheus.MustNewConstMetric(
-				c.RuntimeTotal,
+				c.runtimeTotal,
 				prometheus.CounterValue,
 				float64(cstats.Processor.TotalRuntime100ns)*perflib.TicksToSecondScaleFactor,
 				containerIdWithPrefix,
 			)
 			ch <- prometheus.MustNewConstMetric(
-				c.RuntimeUser,
+				c.runtimeUser,
 				prometheus.CounterValue,
 				float64(cstats.Processor.RuntimeUser100ns)*perflib.TicksToSecondScaleFactor,
 				containerIdWithPrefix,
 			)
 			ch <- prometheus.MustNewConstMetric(
-				c.RuntimeKernel,
+				c.runtimeKernel,
 				prometheus.CounterValue,
 				float64(cstats.Processor.RuntimeKernel100ns)*perflib.TicksToSecondScaleFactor,
 				containerIdWithPrefix,
 			)
 			ch <- prometheus.MustNewConstMetric(
-				c.ReadCountNormalized,
+				c.readCountNormalized,
 				prometheus.CounterValue,
 				float64(cstats.Storage.ReadCountNormalized),
 				containerIdWithPrefix,
 			)
 			ch <- prometheus.MustNewConstMetric(
-				c.ReadSizeBytes,
+				c.readSizeBytes,
 				prometheus.CounterValue,
 				float64(cstats.Storage.ReadSizeBytes),
 				containerIdWithPrefix,
 			)
 			ch <- prometheus.MustNewConstMetric(
-				c.WriteCountNormalized,
+				c.writeCountNormalized,
 				prometheus.CounterValue,
 				float64(cstats.Storage.WriteCountNormalized),
 				containerIdWithPrefix,
 			)
 			ch <- prometheus.MustNewConstMetric(
-				c.WriteSizeBytes,
+				c.writeSizeBytes,
 				prometheus.CounterValue,
 				float64(cstats.Storage.WriteSizeBytes),
 				containerIdWithPrefix,
@@ -346,38 +352,38 @@ func (c *collector) collect(ch chan<- prometheus.Metric) error {
 			}
 
 			ch <- prometheus.MustNewConstMetric(
-				c.BytesReceived,
+				c.bytesReceived,
 				prometheus.CounterValue,
 				float64(endpointStats.BytesReceived),
 				containerIdWithPrefix, endpointId,
 			)
 
 			ch <- prometheus.MustNewConstMetric(
-				c.BytesSent,
+				c.bytesSent,
 				prometheus.CounterValue,
 				float64(endpointStats.BytesSent),
 				containerIdWithPrefix, endpointId,
 			)
 			ch <- prometheus.MustNewConstMetric(
-				c.PacketsReceived,
+				c.packetsReceived,
 				prometheus.CounterValue,
 				float64(endpointStats.PacketsReceived),
 				containerIdWithPrefix, endpointId,
 			)
 			ch <- prometheus.MustNewConstMetric(
-				c.PacketsSent,
+				c.packetsSent,
 				prometheus.CounterValue,
 				float64(endpointStats.PacketsSent),
 				containerIdWithPrefix, endpointId,
 			)
 			ch <- prometheus.MustNewConstMetric(
-				c.DroppedPacketsIncoming,
+				c.droppedPacketsIncoming,
 				prometheus.CounterValue,
 				float64(endpointStats.DroppedPacketsIncoming),
 				containerIdWithPrefix, endpointId,
 			)
 			ch <- prometheus.MustNewConstMetric(
-				c.DroppedPacketsOutgoing,
+				c.droppedPacketsOutgoing,
 				prometheus.CounterValue,
 				float64(endpointStats.DroppedPacketsOutgoing),
 				containerIdWithPrefix, endpointId,

pkg/collector/cpu/cpu.go

@@ -19,71 +19,74 @@ type Config struct{}
 
 var ConfigDefaults = Config{}
 
-type collector struct {
+type Collector struct {
 	logger log.Logger
 
-	CStateSecondsTotal *prometheus.Desc
-	TimeTotal          *prometheus.Desc
-	InterruptsTotal    *prometheus.Desc
-	DPCsTotal          *prometheus.Desc
-
-	ClockInterruptsTotal     *prometheus.Desc
-	IdleBreakEventsTotal     *prometheus.Desc
-	ParkingStatus            *prometheus.Desc
-	ProcessorFrequencyMHz    *prometheus.Desc
-	ProcessorMaxFrequencyMHz *prometheus.Desc
-	ProcessorPerformance     *prometheus.Desc
-	ProcessorMPerf           *prometheus.Desc
-	ProcessorRTC             *prometheus.Desc
-	ProcessorUtility         *prometheus.Desc
-	ProcessorPrivUtility     *prometheus.Desc
+	cStateSecondsTotal         *prometheus.Desc
+	timeTotal                  *prometheus.Desc
+	interruptsTotal            *prometheus.Desc
+	dpcsTotal                  *prometheus.Desc
+	clockInterruptsTotal       *prometheus.Desc
+	idleBreakEventsTotal       *prometheus.Desc
+	parkingStatus              *prometheus.Desc
+	processorFrequencyMHz      *prometheus.Desc
+	processorPerformance       *prometheus.Desc
+	processorMPerf             *prometheus.Desc
+	processorRTC               *prometheus.Desc
+	processorUtility           *prometheus.Desc
+	processorPrivilegedUtility *prometheus.Desc
 }
 
-func New(logger log.Logger, _ *Config) types.Collector {
-	c := &collector{}
+func New(logger log.Logger, _ *Config) *Collector {
+	c := &Collector{}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(_ *kingpin.Application) types.Collector {
-	return &collector{}
+func NewWithFlags(_ *kingpin.Application) *Collector {
+	return &Collector{}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	if winversion.WindowsVersionFloat > 6.05 {
 		return []string{"Processor Information"}, nil
 	}
 	return []string{"Processor"}, nil
 }
 
-func (c *collector) Build() error {
-	c.CStateSecondsTotal = prometheus.NewDesc(
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
+	c.cStateSecondsTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "cstate_seconds_total"),
 		"Time spent in low-power idle state",
 		[]string{"core", "state"},
 		nil,
 	)
-	c.TimeTotal = prometheus.NewDesc(
+	c.timeTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "time_total"),
 		"Time that processor spent in different modes (dpc, idle, interrupt, privileged, user)",
 		[]string{"core", "mode"},
 		nil,
 	)
-	c.InterruptsTotal = prometheus.NewDesc(
+	c.interruptsTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "interrupts_total"),
 		"Total number of received and serviced hardware interrupts",
 		[]string{"core"},
 		nil,
 	)
-	c.DPCsTotal = prometheus.NewDesc(
+	c.dpcsTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "dpcs_total"),
 		"Total number of received and serviced deferred procedure calls (DPCs)",
 		[]string{"core"},
@@ -100,79 +103,79 @@ func (c *collector) Build() error {
 		return nil
 	}
 
-	c.CStateSecondsTotal = prometheus.NewDesc(
+	c.cStateSecondsTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "cstate_seconds_total"),
 		"Time spent in low-power idle state",
 		[]string{"core", "state"},
 		nil,
 	)
-	c.TimeTotal = prometheus.NewDesc(
+	c.timeTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "time_total"),
 		"Time that processor spent in different modes (dpc, idle, interrupt, privileged, user)",
 		[]string{"core", "mode"},
 		nil,
 	)
-	c.InterruptsTotal = prometheus.NewDesc(
+	c.interruptsTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "interrupts_total"),
 		"Total number of received and serviced hardware interrupts",
 		[]string{"core"},
 		nil,
 	)
-	c.DPCsTotal = prometheus.NewDesc(
+	c.dpcsTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "dpcs_total"),
 		"Total number of received and serviced deferred procedure calls (DPCs)",
 		[]string{"core"},
 		nil,
 	)
-	c.ClockInterruptsTotal = prometheus.NewDesc(
+	c.clockInterruptsTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "clock_interrupts_total"),
 		"Total number of received and serviced clock tick interrupts",
 		[]string{"core"},
 		nil,
 	)
-	c.IdleBreakEventsTotal = prometheus.NewDesc(
+	c.idleBreakEventsTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "idle_break_events_total"),
 		"Total number of time processor was woken from idle",
 		[]string{"core"},
 		nil,
 	)
-	c.ParkingStatus = prometheus.NewDesc(
+	c.parkingStatus = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "parking_status"),
 		"Parking Status represents whether a processor is parked or not",
 		[]string{"core"},
 		nil,
 	)
-	c.ProcessorFrequencyMHz = prometheus.NewDesc(
+	c.processorFrequencyMHz = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "core_frequency_mhz"),
 		"Core frequency in megahertz",
 		[]string{"core"},
 		nil,
 	)
-	c.ProcessorPerformance = prometheus.NewDesc(
+	c.processorPerformance = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "processor_performance_total"),
 		"Processor Performance is the average performance of the processor while it is executing instructions, as a percentage of the nominal performance of the processor. On some processors, Processor Performance may exceed 100%",
 		[]string{"core"},
 		nil,
 	)
-	c.ProcessorMPerf = prometheus.NewDesc(
+	c.processorMPerf = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "processor_mperf_total"),
 		"Processor MPerf is the number of TSC ticks incremented while executing instructions",
 		[]string{"core"},
 		nil,
 	)
-	c.ProcessorRTC = prometheus.NewDesc(
+	c.processorRTC = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "processor_rtc_total"),
 		"Processor RTC represents the number of RTC ticks made since the system booted. It should consistently be 64e6, and can be used to properly derive Processor Utility Rate",
 		[]string{"core"},
 		nil,
 	)
-	c.ProcessorUtility = prometheus.NewDesc(
+	c.processorUtility = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "processor_utility_total"),
 		"Processor Utility represents is the amount of time the core spends executing instructions",
 		[]string{"core"},
 		nil,
 	)
-	c.ProcessorPrivUtility = prometheus.NewDesc(
+	c.processorPrivilegedUtility = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "processor_privileged_utility_total"),
 		"Processor Privileged Utility represents is the amount of time the core has spent executing instructions inside the kernel",
 		[]string{"core"},
@@ -182,7 +185,7 @@ func (c *collector) Build() error {
 	return nil
 }
 
-func (c *collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	if winversion.WindowsVersionFloat > 6.05 {
 		return c.CollectFull(ctx, ch)
 	}
@@ -209,7 +212,7 @@ type perflibProcessor struct {
 	PercentUserTime       float64 `perflib:"% User Time"`
 }
 
-func (c *collector) CollectBasic(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) CollectBasic(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	data := make([]perflibProcessor, 0)
 	err := perflib.UnmarshalObject(ctx.PerfObjects["Processor"], &data, c.logger)
 	if err != nil {
@@ -223,63 +226,63 @@ func (c *collector) CollectBasic(ctx *types.ScrapeContext, ch chan<- prometheus.
 		core := cpu.Name
 
 		ch <- prometheus.MustNewConstMetric(
-			c.CStateSecondsTotal,
+			c.cStateSecondsTotal,
 			prometheus.CounterValue,
 			cpu.PercentC1Time,
 			core, "c1",
 		)
 		ch <- prometheus.MustNewConstMetric(
-			c.CStateSecondsTotal,
+			c.cStateSecondsTotal,
 			prometheus.CounterValue,
 			cpu.PercentC2Time,
 			core, "c2",
 		)
 		ch <- prometheus.MustNewConstMetric(
-			c.CStateSecondsTotal,
+			c.cStateSecondsTotal,
 			prometheus.CounterValue,
 			cpu.PercentC3Time,
 			core, "c3",
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.TimeTotal,
+			c.timeTotal,
 			prometheus.CounterValue,
 			cpu.PercentIdleTime,
 			core, "idle",
 		)
 		ch <- prometheus.MustNewConstMetric(
-			c.TimeTotal,
+			c.timeTotal,
 			prometheus.CounterValue,
 			cpu.PercentInterruptTime,
 			core, "interrupt",
 		)
 		ch <- prometheus.MustNewConstMetric(
-			c.TimeTotal,
+			c.timeTotal,
 			prometheus.CounterValue,
 			cpu.PercentDPCTime,
 			core, "dpc",
 		)
 		ch <- prometheus.MustNewConstMetric(
-			c.TimeTotal,
+			c.timeTotal,
 			prometheus.CounterValue,
 			cpu.PercentPrivilegedTime,
 			core, "privileged",
 		)
 		ch <- prometheus.MustNewConstMetric(
-			c.TimeTotal,
+			c.timeTotal,
 			prometheus.CounterValue,
 			cpu.PercentUserTime,
 			core, "user",
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.InterruptsTotal,
+			c.interruptsTotal,
 			prometheus.CounterValue,
 			cpu.Interrupts,
 			core,
 		)
 		ch <- prometheus.MustNewConstMetric(
-			c.DPCsTotal,
+			c.dpcsTotal,
 			prometheus.CounterValue,
 			cpu.DPCsQueued,
 			core,
@@ -318,7 +321,7 @@ type perflibProcessorInformation struct {
 	UserTimeSeconds          float64 `perflib:"% User Time"`
 }
 
-func (c *collector) CollectFull(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) CollectFull(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	data := make([]perflibProcessorInformation, 0)
 	err := perflib.UnmarshalObject(ctx.PerfObjects["Processor Information"], &data, c.logger)
 	if err != nil {
@@ -332,119 +335,119 @@ func (c *collector) CollectFull(ctx *types.ScrapeContext, ch chan<- prometheus.M
 		core := cpu.Name
 
 		ch <- prometheus.MustNewConstMetric(
-			c.CStateSecondsTotal,
+			c.cStateSecondsTotal,
 			prometheus.CounterValue,
 			cpu.C1TimeSeconds,
 			core, "c1",
 		)
 		ch <- prometheus.MustNewConstMetric(
-			c.CStateSecondsTotal,
+			c.cStateSecondsTotal,
 			prometheus.CounterValue,
 			cpu.C2TimeSeconds,
 			core, "c2",
 		)
 		ch <- prometheus.MustNewConstMetric(
-			c.CStateSecondsTotal,
+			c.cStateSecondsTotal,
 			prometheus.CounterValue,
 			cpu.C3TimeSeconds,
 			core, "c3",
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.TimeTotal,
+			c.timeTotal,
 			prometheus.CounterValue,
 			cpu.IdleTimeSeconds,
 			core, "idle",
 		)
 		ch <- prometheus.MustNewConstMetric(
-			c.TimeTotal,
+			c.timeTotal,
 			prometheus.CounterValue,
 			cpu.InterruptTimeSeconds,
 			core, "interrupt",
 		)
 		ch <- prometheus.MustNewConstMetric(
-			c.TimeTotal,
+			c.timeTotal,
 			prometheus.CounterValue,
 			cpu.DPCTimeSeconds,
 			core, "dpc",
 		)
 		ch <- prometheus.MustNewConstMetric(
-			c.TimeTotal,
+			c.timeTotal,
 			prometheus.CounterValue,
 			cpu.PrivilegedTimeSeconds,
 			core, "privileged",
 		)
 		ch <- prometheus.MustNewConstMetric(
-			c.TimeTotal,
+			c.timeTotal,
 			prometheus.CounterValue,
 			cpu.UserTimeSeconds,
 			core, "user",
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.InterruptsTotal,
+			c.interruptsTotal,
 			prometheus.CounterValue,
 			cpu.InterruptsTotal,
 			core,
 		)
 		ch <- prometheus.MustNewConstMetric(
-			c.DPCsTotal,
+			c.dpcsTotal,
 			prometheus.CounterValue,
 			cpu.DPCsQueuedTotal,
 			core,
 		)
 		ch <- prometheus.MustNewConstMetric(
-			c.ClockInterruptsTotal,
+			c.clockInterruptsTotal,
 			prometheus.CounterValue,
 			cpu.ClockInterruptsTotal,
 			core,
 		)
 		ch <- prometheus.MustNewConstMetric(
-			c.IdleBreakEventsTotal,
+			c.idleBreakEventsTotal,
 			prometheus.CounterValue,
 			cpu.IdleBreakEventsTotal,
 			core,
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.ParkingStatus,
+			c.parkingStatus,
 			prometheus.GaugeValue,
 			cpu.ParkingStatus,
 			core,
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.ProcessorFrequencyMHz,
+			c.processorFrequencyMHz,
 			prometheus.GaugeValue,
 			cpu.ProcessorFrequencyMHz,
 			core,
 		)
 		ch <- prometheus.MustNewConstMetric(
-			c.ProcessorPerformance,
+			c.processorPerformance,
 			prometheus.CounterValue,
 			cpu.ProcessorPerformance,
 			core,
 		)
 		ch <- prometheus.MustNewConstMetric(
-			c.ProcessorMPerf,
+			c.processorMPerf,
 			prometheus.CounterValue,
 			cpu.ProcessorMPerf,
 			core,
 		)
 		ch <- prometheus.MustNewConstMetric(
-			c.ProcessorRTC,
+			c.processorRTC,
 			prometheus.CounterValue,
 			cpu.ProcessorRTC,
 			core,
 		)
 		ch <- prometheus.MustNewConstMetric(
-			c.ProcessorUtility,
+			c.processorUtility,
 			prometheus.CounterValue,
 			cpu.ProcessorUtilityRate,
 			core,
 		)
 		ch <- prometheus.MustNewConstMetric(
-			c.ProcessorPrivUtility,
+			c.processorPrivilegedUtility,
 			prometheus.CounterValue,
 			cpu.PrivilegedUtilitySeconds,
 			core,

pkg/collector/cpu_info/cpu_info.go

@@ -25,37 +25,42 @@ type Config struct{}
 
 var ConfigDefaults = Config{}
 
-// A collector is a Prometheus collector for a few WMI metrics in Win32_Processor
-type collector struct {
+// A Collector is a Prometheus Collector for a few WMI metrics in Win32_Processor
+type Collector struct {
 	logger log.Logger
 
-	CpuInfo *prometheus.Desc
+	cpuInfo *prometheus.Desc
 }
 
-func New(logger log.Logger, _ *Config) types.Collector {
-	c := &collector{}
+func New(logger log.Logger, _ *Config) *Collector {
+	c := &Collector{}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(_ *kingpin.Application) types.Collector {
-	return &collector{}
+func NewWithFlags(_ *kingpin.Application) *Collector {
+	return &Collector{}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{}, nil
 }
 
-func (c *collector) Build() error {
-	c.CpuInfo = prometheus.NewDesc(
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
+	c.cpuInfo = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, "", Name),
 		"Labelled CPU information as provided provided by Win32_Processor",
 		[]string{
@@ -85,7 +90,7 @@ type win32_Processor struct {
 
 // Collect sends the metric values for each metric
 // to the provided prometheus Metric channel.
-func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	if err := c.collect(ch); err != nil {
 		_ = level.Error(c.logger).Log("msg", "failed collecting cpu_info metrics", "err", err)
 		return err
@@ -93,7 +98,7 @@ func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric)
 	return nil
 }
 
-func (c *collector) collect(ch chan<- prometheus.Metric) error {
+func (c *Collector) collect(ch chan<- prometheus.Metric) error {
 	var dst []win32_Processor
 	// We use a static query here because the provided methods in wmi.go all issue a SELECT *;
 	// This results in the time-consuming LoadPercentage field being read which seems to measure each CPU
@@ -108,7 +113,7 @@ func (c *collector) collect(ch chan<- prometheus.Metric) error {
 	// Some CPUs end up exposing trailing spaces for certain strings, so clean them up
 	for _, processor := range dst {
 		ch <- prometheus.MustNewConstMetric(
-			c.CpuInfo,
+			c.cpuInfo,
 			prometheus.GaugeValue,
 			1.0,
 			strconv.Itoa(int(processor.Architecture)),

pkg/collector/cpu_info/cpu_info_test.go

@@ -0,0 +1,12 @@
+package cpu_info_test
+
+import (
+	"testing"
+
+	"github.com/prometheus-community/windows_exporter/pkg/collector/cpu_info"
+	"github.com/prometheus-community/windows_exporter/pkg/testutils"
+)
+
+func BenchmarkCollector(b *testing.B) {
+	testutils.FuncBenchmarkCollector(b, cpu_info.Name, cpu_info.NewWithFlags)
+}

pkg/collector/cs/cs.go

@@ -17,38 +17,43 @@ type Config struct{}
 
 var ConfigDefaults = Config{}
 
-// A collector is a Prometheus collector for WMI metrics
-type collector struct {
+// A Collector is a Prometheus Collector for WMI metrics
+type Collector struct {
 	logger log.Logger
 
 	PhysicalMemoryBytes *prometheus.Desc
 	LogicalProcessors   *prometheus.Desc
-	Hostname            *prometheus.Desc
+	hostname            *prometheus.Desc
 }
 
-func New(logger log.Logger, _ *Config) types.Collector {
-	c := &collector{}
+func New(logger log.Logger, _ *Config) *Collector {
+	c := &Collector{}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(_ *kingpin.Application) types.Collector {
-	return &collector{}
+func NewWithFlags(_ *kingpin.Application) *Collector {
+	return &Collector{}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	c.LogicalProcessors = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "logical_processors"),
 		"ComputerSystem.NumberOfLogicalProcessors",
@@ -61,7 +66,7 @@ func (c *collector) Build() error {
 		nil,
 		nil,
 	)
-	c.Hostname = prometheus.NewDesc(
+	c.hostname = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "hostname"),
 		"Labelled system hostname information as provided by ComputerSystem.DNSHostName and ComputerSystem.Domain",
 		[]string{
@@ -76,7 +81,7 @@ func (c *collector) Build() error {
 
 // Collect sends the metric values for each metric
 // to the provided prometheus Metric channel.
-func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	if err := c.collect(ch); err != nil {
 		_ = level.Error(c.logger).Log("msg", "failed collecting cs metrics", "err", err)
 		return err
@@ -84,7 +89,7 @@ func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric)
 	return nil
 }
 
-func (c *collector) collect(ch chan<- prometheus.Metric) error {
+func (c *Collector) collect(ch chan<- prometheus.Metric) error {
 	// Get systeminfo for number of processors
 	systemInfo := sysinfoapi.GetSystemInfo()
 
@@ -120,7 +125,7 @@ func (c *collector) collect(ch chan<- prometheus.Metric) error {
 	}
 
 	ch <- prometheus.MustNewConstMetric(
-		c.Hostname,
+		c.hostname,
 		prometheus.GaugeValue,
 		1.0,
 		hostname,

pkg/collector/dfsr/dfsr.go

@@ -12,79 +12,76 @@ import (
 	"github.com/prometheus/client_golang/prometheus"
 )
 
-const (
-	Name                      = "dfsr"
-	FlagDfsrEnabledCollectors = "collectors.dfsr.sources-enabled"
-)
+const Name = "dfsr"
 
 type Config struct {
-	DfsrEnabledCollectors string `yaml:"enabled_collectors"`
+	EnabledCollectors string `yaml:"enabled_collectors"`
 }
 
 var ConfigDefaults = Config{
-	DfsrEnabledCollectors: "connection,folder,volume",
+	EnabledCollectors: "connection,folder,volume",
 }
 
-// collector contains the metric and state data of the DFSR collectors.
-type collector struct {
+// Collector contains the metric and state data of the DFSR collectors.
+type Collector struct {
 	logger log.Logger
 
 	dfsrEnabledCollectors *string
 
-	// Connection source
-	ConnectionBandwidthSavingsUsingDFSReplicationTotal *prometheus.Desc
-	ConnectionBytesReceivedTotal                       *prometheus.Desc
-	ConnectionCompressedSizeOfFilesReceivedTotal       *prometheus.Desc
-	ConnectionFilesReceivedTotal                       *prometheus.Desc
-	ConnectionRDCBytesReceivedTotal                    *prometheus.Desc
-	ConnectionRDCCompressedSizeOfFilesReceivedTotal    *prometheus.Desc
-	ConnectionRDCSizeOfFilesReceivedTotal              *prometheus.Desc
-	ConnectionRDCNumberofFilesReceivedTotal            *prometheus.Desc
-	ConnectionSizeOfFilesReceivedTotal                 *prometheus.Desc
+	// connection source
+	connectionBandwidthSavingsUsingDFSReplicationTotal *prometheus.Desc
+	connectionBytesReceivedTotal                       *prometheus.Desc
+	connectionCompressedSizeOfFilesReceivedTotal       *prometheus.Desc
+	connectionFilesReceivedTotal                       *prometheus.Desc
+	connectionRDCBytesReceivedTotal                    *prometheus.Desc
+	connectionRDCCompressedSizeOfFilesReceivedTotal    *prometheus.Desc
+	connectionRDCSizeOfFilesReceivedTotal              *prometheus.Desc
+	connectionRDCNumberofFilesReceivedTotal            *prometheus.Desc
+	connectionSizeOfFilesReceivedTotal                 *prometheus.Desc
 
-	// Folder source
-	FolderBandwidthSavingsUsingDFSReplicationTotal *prometheus.Desc
-	FolderCompressedSizeOfFilesReceivedTotal       *prometheus.Desc
-	FolderConflictBytesCleanedupTotal              *prometheus.Desc
-	FolderConflictBytesGeneratedTotal              *prometheus.Desc
-	FolderConflictFilesCleanedUpTotal              *prometheus.Desc
-	FolderConflictFilesGeneratedTotal              *prometheus.Desc
-	FolderConflictFolderCleanupsCompletedTotal     *prometheus.Desc
-	FolderConflictSpaceInUse                       *prometheus.Desc
-	FolderDeletedSpaceInUse                        *prometheus.Desc
-	FolderDeletedBytesCleanedUpTotal               *prometheus.Desc
-	FolderDeletedBytesGeneratedTotal               *prometheus.Desc
-	FolderDeletedFilesCleanedUpTotal               *prometheus.Desc
-	FolderDeletedFilesGeneratedTotal               *prometheus.Desc
-	FolderFileInstallsRetriedTotal                 *prometheus.Desc
-	FolderFileInstallsSucceededTotal               *prometheus.Desc
-	FolderFilesReceivedTotal                       *prometheus.Desc
-	FolderRDCBytesReceivedTotal                    *prometheus.Desc
-	FolderRDCCompressedSizeOfFilesReceivedTotal    *prometheus.Desc
-	FolderRDCNumberofFilesReceivedTotal            *prometheus.Desc
-	FolderRDCSizeOfFilesReceivedTotal              *prometheus.Desc
-	FolderSizeOfFilesReceivedTotal                 *prometheus.Desc
-	FolderStagingSpaceInUse                        *prometheus.Desc
-	FolderStagingBytesCleanedUpTotal               *prometheus.Desc
-	FolderStagingBytesGeneratedTotal               *prometheus.Desc
-	FolderStagingFilesCleanedUpTotal               *prometheus.Desc
-	FolderStagingFilesGeneratedTotal               *prometheus.Desc
-	FolderUpdatesDroppedTotal                      *prometheus.Desc
+	// folder source
+	folderBandwidthSavingsUsingDFSReplicationTotal *prometheus.Desc
+	folderCompressedSizeOfFilesReceivedTotal       *prometheus.Desc
+	folderConflictBytesCleanedupTotal              *prometheus.Desc
+	folderConflictBytesGeneratedTotal              *prometheus.Desc
+	folderConflictFilesCleanedUpTotal              *prometheus.Desc
+	folderConflictFilesGeneratedTotal              *prometheus.Desc
+	folderConflictfolderCleanupsCompletedTotal     *prometheus.Desc
+	folderConflictSpaceInUse                       *prometheus.Desc
+	folderDeletedSpaceInUse                        *prometheus.Desc
+	folderDeletedBytesCleanedUpTotal               *prometheus.Desc
+	folderDeletedBytesGeneratedTotal               *prometheus.Desc
+	folderDeletedFilesCleanedUpTotal               *prometheus.Desc
+	folderDeletedFilesGeneratedTotal               *prometheus.Desc
+	folderFileInstallsRetriedTotal                 *prometheus.Desc
+	folderFileInstallsSucceededTotal               *prometheus.Desc
+	folderFilesReceivedTotal                       *prometheus.Desc
+	folderRDCBytesReceivedTotal                    *prometheus.Desc
+	folderRDCCompressedSizeOfFilesReceivedTotal    *prometheus.Desc
+	folderRDCNumberofFilesReceivedTotal            *prometheus.Desc
+	folderRDCSizeOfFilesReceivedTotal              *prometheus.Desc
+	folderSizeOfFilesReceivedTotal                 *prometheus.Desc
+	folderStagingSpaceInUse                        *prometheus.Desc
+	folderStagingBytesCleanedUpTotal               *prometheus.Desc
+	folderStagingBytesGeneratedTotal               *prometheus.Desc
+	folderStagingFilesCleanedUpTotal               *prometheus.Desc
+	folderStagingFilesGeneratedTotal               *prometheus.Desc
+	folderUpdatesDroppedTotal                      *prometheus.Desc
 
-	// Volume source
-	VolumeDatabaseLookupsTotal           *prometheus.Desc
-	VolumeDatabaseCommitsTotal           *prometheus.Desc
-	VolumeUSNJournalUnreadPercentage     *prometheus.Desc
-	VolumeUSNJournalRecordsAcceptedTotal *prometheus.Desc
-	VolumeUSNJournalRecordsReadTotal     *prometheus.Desc
+	// volume source
+	volumeDatabaseLookupsTotal           *prometheus.Desc
+	volumeDatabaseCommitsTotal           *prometheus.Desc
+	volumeUSNJournalUnreadPercentage     *prometheus.Desc
+	volumeUSNJournalRecordsAcceptedTotal *prometheus.Desc
+	volumeUSNJournalRecordsReadTotal     *prometheus.Desc
 
-	// Map of child collector functions used during collection
+	// Map of child Collector functions used during collection
 	dfsrChildCollectors []dfsrCollectorFunc
 }
 
 type dfsrCollectorFunc func(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error
 
-// Map Perflib sources to DFSR collector names
+// Map Perflib sources to DFSR Collector names
 // e.g, volume -> DFS Replication Service Volumes
 func dfsrGetPerfObjectName(collector string) string {
 	prefix := "DFS "
@@ -100,35 +97,37 @@ func dfsrGetPerfObjectName(collector string) string {
 	return prefix + suffix
 }
 
-func New(logger log.Logger, config *Config) types.Collector {
+func New(logger log.Logger, config *Config) *Collector {
 	if config == nil {
 		config = &ConfigDefaults
 	}
 
-	c := &collector{
-		dfsrEnabledCollectors: &config.DfsrEnabledCollectors,
+	c := &Collector{
+		dfsrEnabledCollectors: &config.EnabledCollectors,
 	}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(app *kingpin.Application) types.Collector {
-	return &collector{
+func NewWithFlags(app *kingpin.Application) *Collector {
+	return &Collector{
 		dfsrEnabledCollectors: app.
-			Flag(FlagDfsrEnabledCollectors, "Comma-seperated list of DFSR Perflib sources to use.").Default("connection,folder,volume").
-			Default(ConfigDefaults.DfsrEnabledCollectors).String(),
+			Flag("collectors.dfsr.sources-enabled", "Comma-seperated list of DFSR Perflib sources to use.").
+			Default(ConfigDefaults.EnabledCollectors).
+			String(),
 	}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	// Perflib sources are dynamic, depending on the enabled child collectors
 	expandedChildCollectors := utils.ExpandEnabledChildCollectors(*c.dfsrEnabledCollectors)
 	perflibDependencies := make([]string, 0, len(expandedChildCollectors))
@@ -139,295 +138,299 @@ func (c *collector) GetPerfCounter() ([]string, error) {
 	return perflibDependencies, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	_ = level.Info(c.logger).Log("msg", "dfsr collector is in an experimental state! Metrics for this collector have not been tested.")
 
-	// Connection
-	c.ConnectionBandwidthSavingsUsingDFSReplicationTotal = prometheus.NewDesc(
+	// connection
+	c.connectionBandwidthSavingsUsingDFSReplicationTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "connection_bandwidth_savings_using_dfs_replication_bytes_total"),
 		"Total bytes of bandwidth saved using DFS Replication for this connection",
 		[]string{"name"},
 		nil,
 	)
 
-	c.ConnectionBytesReceivedTotal = prometheus.NewDesc(
+	c.connectionBytesReceivedTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "connection_bytes_received_total"),
 		"Total bytes received for connection",
 		[]string{"name"},
 		nil,
 	)
 
-	c.ConnectionCompressedSizeOfFilesReceivedTotal = prometheus.NewDesc(
+	c.connectionCompressedSizeOfFilesReceivedTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "connection_compressed_size_of_files_received_bytes_total"),
 		"Total compressed size of files received on the connection, in bytes",
 		[]string{"name"},
 		nil,
 	)
 
-	c.ConnectionFilesReceivedTotal = prometheus.NewDesc(
+	c.connectionFilesReceivedTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "connection_received_files_total"),
 		"Total number of files received for connection",
 		[]string{"name"},
 		nil,
 	)
 
-	c.ConnectionRDCBytesReceivedTotal = prometheus.NewDesc(
+	c.connectionRDCBytesReceivedTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "connection_rdc_received_bytes_total"),
 		"Total bytes received on the connection while replicating files using Remote Differential Compression",
 		[]string{"name"},
 		nil,
 	)
 
-	c.ConnectionRDCCompressedSizeOfFilesReceivedTotal = prometheus.NewDesc(
+	c.connectionRDCCompressedSizeOfFilesReceivedTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "connection_rdc_compressed_size_of_received_files_bytes_total"),
 		"Total uncompressed size of files received with Remote Differential Compression for connection",
 		[]string{"name"},
 		nil,
 	)
 
-	c.ConnectionRDCNumberofFilesReceivedTotal = prometheus.NewDesc(
+	c.connectionRDCNumberofFilesReceivedTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "connection_rdc_received_files_total"),
 		"Total number of files received using remote differential compression",
 		[]string{"name"},
 		nil,
 	)
 
-	c.ConnectionRDCSizeOfFilesReceivedTotal = prometheus.NewDesc(
+	c.connectionRDCSizeOfFilesReceivedTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "connection_rdc_size_of_received_files_bytes_total"),
 		"Total size of received Remote Differential Compression files, in bytes.",
 		[]string{"name"},
 		nil,
 	)
 
-	c.ConnectionSizeOfFilesReceivedTotal = prometheus.NewDesc(
+	c.connectionSizeOfFilesReceivedTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "connection_files_received_bytes_total"),
 		"Total size of files received, in bytes",
 		[]string{"name"},
 		nil,
 	)
 
-	c. // Folder
-		FolderBandwidthSavingsUsingDFSReplicationTotal = prometheus.NewDesc(
+	c. // folder
+		folderBandwidthSavingsUsingDFSReplicationTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "folder_bandwidth_savings_using_dfs_replication_bytes_total"),
 		"Total bytes of bandwidth saved using DFS Replication for this folder",
 		[]string{"name"},
 		nil,
 	)
 
-	c.FolderCompressedSizeOfFilesReceivedTotal = prometheus.NewDesc(
+	c.folderCompressedSizeOfFilesReceivedTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "folder_compressed_size_of_received_files_bytes_total"),
 		"Total compressed size of files received on the folder, in bytes",
 		[]string{"name"},
 		nil,
 	)
 
-	c.FolderConflictBytesCleanedupTotal = prometheus.NewDesc(
+	c.folderConflictBytesCleanedupTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "folder_conflict_cleaned_up_bytes_total"),
 		"Total size of conflict loser files and folders deleted from the Conflict and Deleted folder, in bytes",
 		[]string{"name"},
 		nil,
 	)
 
-	c.FolderConflictBytesGeneratedTotal = prometheus.NewDesc(
+	c.folderConflictBytesGeneratedTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "folder_conflict_generated_bytes_total"),
 		"Total size of conflict loser files and folders moved to the Conflict and Deleted folder, in bytes",
 		[]string{"name"},
 		nil,
 	)
 
-	c.FolderConflictFilesCleanedUpTotal = prometheus.NewDesc(
+	c.folderConflictFilesCleanedUpTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "folder_conflict_cleaned_up_files_total"),
 		"Number of conflict loser files deleted from the Conflict and Deleted folder",
 		[]string{"name"},
 		nil,
 	)
 
-	c.FolderConflictFilesGeneratedTotal = prometheus.NewDesc(
+	c.folderConflictFilesGeneratedTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "folder_conflict_generated_files_total"),
 		"Number of files and folders moved to the Conflict and Deleted folder",
 		[]string{"name"},
 		nil,
 	)
 
-	c.FolderConflictFolderCleanupsCompletedTotal = prometheus.NewDesc(
+	c.folderConflictfolderCleanupsCompletedTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "folder_conflict_folder_cleanups_total"),
 		"Number of deletions of conflict loser files and folders in the Conflict and Deleted",
 		[]string{"name"},
 		nil,
 	)
 
-	c.FolderConflictSpaceInUse = prometheus.NewDesc(
+	c.folderConflictSpaceInUse = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "folder_conflict_space_in_use_bytes"),
 		"Total size of the conflict loser files and folders currently in the Conflict and Deleted folder",
 		[]string{"name"},
 		nil,
 	)
 
-	c.FolderDeletedSpaceInUse = prometheus.NewDesc(
+	c.folderDeletedSpaceInUse = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "folder_deleted_space_in_use_bytes"),
 		"Total size (in bytes) of the deleted files and folders currently in the Conflict and Deleted folder",
 		[]string{"name"},
 		nil,
 	)
 
-	c.FolderDeletedBytesCleanedUpTotal = prometheus.NewDesc(
+	c.folderDeletedBytesCleanedUpTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "folder_deleted_cleaned_up_bytes_total"),
 		"Total size (in bytes) of replicating deleted files and folders that were cleaned up from the Conflict and Deleted folder",
 		[]string{"name"},
 		nil,
 	)
 
-	c.FolderDeletedBytesGeneratedTotal = prometheus.NewDesc(
+	c.folderDeletedBytesGeneratedTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "folder_deleted_generated_bytes_total"),
 		"Total size (in bytes) of replicated deleted files and folders that were moved to the Conflict and Deleted folder after they were deleted from a replicated folder on a sending member",
 		[]string{"name"},
 		nil,
 	)
 
-	c.FolderDeletedFilesCleanedUpTotal = prometheus.NewDesc(
+	c.folderDeletedFilesCleanedUpTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "folder_deleted_cleaned_up_files_total"),
 		"Number of files and folders that were cleaned up from the Conflict and Deleted folder",
 		[]string{"name"},
 		nil,
 	)
 
-	c.FolderDeletedFilesGeneratedTotal = prometheus.NewDesc(
+	c.folderDeletedFilesGeneratedTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "folder_deleted_generated_files_total"),
 		"Number of deleted files and folders that were moved to the Conflict and Deleted folder",
 		[]string{"name"},
 		nil,
 	)
 
-	c.FolderFileInstallsRetriedTotal = prometheus.NewDesc(
+	c.folderFileInstallsRetriedTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "folder_file_installs_retried_total"),
 		"Total number of file installs that are being retried due to sharing violations or other errors encountered when installing the files",
 		[]string{"name"},
 		nil,
 	)
 
-	c.FolderFileInstallsSucceededTotal = prometheus.NewDesc(
+	c.folderFileInstallsSucceededTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "folder_file_installs_succeeded_total"),
 		"Total number of files that were successfully received from sending members and installed locally on this server",
 		[]string{"name"},
 		nil,
 	)
 
-	c.FolderFilesReceivedTotal = prometheus.NewDesc(
+	c.folderFilesReceivedTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "folder_received_files_total"),
 		"Total number of files received",
 		[]string{"name"},
 		nil,
 	)
 
-	c.FolderRDCBytesReceivedTotal = prometheus.NewDesc(
+	c.folderRDCBytesReceivedTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "folder_rdc_received_bytes_total"),
 		"Total number of bytes received in replicating files using Remote Differential Compression",
 		[]string{"name"},
 		nil,
 	)
 
-	c.FolderRDCCompressedSizeOfFilesReceivedTotal = prometheus.NewDesc(
+	c.folderRDCCompressedSizeOfFilesReceivedTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "folder_rdc_compressed_size_of_received_files_bytes_total"),
 		"Total compressed size (in bytes) of the files received with Remote Differential Compression",
 		[]string{"name"},
 		nil,
 	)
 
-	c.FolderRDCNumberofFilesReceivedTotal = prometheus.NewDesc(
+	c.folderRDCNumberofFilesReceivedTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "folder_rdc_received_files_total"),
 		"Total number of files received with Remote Differential Compression",
 		[]string{"name"},
 		nil,
 	)
 
-	c.FolderRDCSizeOfFilesReceivedTotal = prometheus.NewDesc(
+	c.folderRDCSizeOfFilesReceivedTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "folder_rdc_files_received_bytes_total"),
 		"Total uncompressed size (in bytes) of the files received with Remote Differential Compression",
 		[]string{"name"},
 		nil,
 	)
 
-	c.FolderSizeOfFilesReceivedTotal = prometheus.NewDesc(
+	c.folderSizeOfFilesReceivedTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "folder_files_received_bytes_total"),
 		"Total uncompressed size (in bytes) of the files received",
 		[]string{"name"},
 		nil,
 	)
 
-	c.FolderStagingSpaceInUse = prometheus.NewDesc(
+	c.folderStagingSpaceInUse = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "folder_staging_space_in_use_bytes"),
 		"Total size of files and folders currently in the staging folder.",
 		[]string{"name"},
 		nil,
 	)
 
-	c.FolderStagingBytesCleanedUpTotal = prometheus.NewDesc(
+	c.folderStagingBytesCleanedUpTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "folder_staging_cleaned_up_bytes_total"),
 		"Total size (in bytes) of the files and folders that have been cleaned up from the staging folder",
 		[]string{"name"},
 		nil,
 	)
 
-	c.FolderStagingBytesGeneratedTotal = prometheus.NewDesc(
+	c.folderStagingBytesGeneratedTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "folder_staging_generated_bytes_total"),
 		"Total size (in bytes) of replicated files and folders in the staging folder created by the DFS Replication service since last restart",
 		[]string{"name"},
 		nil,
 	)
 
-	c.FolderStagingFilesCleanedUpTotal = prometheus.NewDesc(
+	c.folderStagingFilesCleanedUpTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "folder_staging_cleaned_up_files_total"),
 		"Total number of files and folders that have been cleaned up from the staging folder",
 		[]string{"name"},
 		nil,
 	)
 
-	c.FolderStagingFilesGeneratedTotal = prometheus.NewDesc(
+	c.folderStagingFilesGeneratedTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "folder_staging_generated_files_total"),
 		"Total number of times replicated files and folders have been staged by the DFS Replication service",
 		[]string{"name"},
 		nil,
 	)
 
-	c.FolderUpdatesDroppedTotal = prometheus.NewDesc(
+	c.folderUpdatesDroppedTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "folder_dropped_updates_total"),
 		"Total number of redundant file replication update records that have been ignored by the DFS Replication service because they did not change the replicated file or folder",
 		[]string{"name"},
 		nil,
 	)
 
-	c. // Volume
-		VolumeDatabaseCommitsTotal = prometheus.NewDesc(
+	// volume
+	c.volumeDatabaseCommitsTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "volume_database_commits_total"),
-		"Total number of DFSR Volume database commits",
+		"Total number of DFSR volume database commits",
 		[]string{"name"},
 		nil,
 	)
 
-	c.VolumeDatabaseLookupsTotal = prometheus.NewDesc(
+	c.volumeDatabaseLookupsTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "volume_database_lookups_total"),
-		"Total number of DFSR Volume database lookups",
+		"Total number of DFSR volume database lookups",
 		[]string{"name"},
 		nil,
 	)
 
-	c.VolumeUSNJournalUnreadPercentage = prometheus.NewDesc(
+	c.volumeUSNJournalUnreadPercentage = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "volume_usn_journal_unread_percentage"),
-		"Percentage of DFSR Volume USN journal records that are unread",
+		"Percentage of DFSR volume USN journal records that are unread",
 		[]string{"name"},
 		nil,
 	)
 
-	c.VolumeUSNJournalRecordsAcceptedTotal = prometheus.NewDesc(
+	c.volumeUSNJournalRecordsAcceptedTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "volume_usn_journal_accepted_records_total"),
 		"Total number of USN journal records accepted",
 		[]string{"name"},
 		nil,
 	)
 
-	c.VolumeUSNJournalRecordsReadTotal = prometheus.NewDesc(
+	c.volumeUSNJournalRecordsReadTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "volume_usn_journal_read_records_total"),
-		"Total number of DFSR Volume USN journal records read",
+		"Total number of DFSR volume USN journal records read",
 		[]string{"name"},
 		nil,
 	)
@@ -438,8 +441,8 @@ func (c *collector) Build() error {
 }
 
 // Maps enabled child collectors names to their relevant collection function,
-// for use in collector.Collect()
-func (c *collector) getDFSRChildCollectors(enabledCollectors []string) []dfsrCollectorFunc {
+// for use in Collector.Collect()
+func (c *Collector) getDFSRChildCollectors(enabledCollectors []string) []dfsrCollectorFunc {
 	var dfsrCollectors []dfsrCollectorFunc
 	for _, collector := range enabledCollectors {
 		switch collector {
@@ -457,7 +460,7 @@ func (c *collector) getDFSRChildCollectors(enabledCollectors []string) []dfsrCol
 
 // Collect implements the Collector interface.
 // Sends metric values for each metric to the provided prometheus Metric channel.
-func (c *collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	for _, fn := range c.dfsrChildCollectors {
 		err := fn(ctx, ch)
 		if err != nil {
@@ -482,7 +485,7 @@ type PerflibDFSRConnection struct {
 	SizeOfFilesReceivedTotal                 float64 `perflib:"Size of Files Received"`
 }
 
-func (c *collector) collectConnection(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) collectConnection(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	var dst []PerflibDFSRConnection
 	if err := perflib.UnmarshalObject(ctx.PerfObjects["DFS Replication Connections"], &dst, c.logger); err != nil {
 		return err
@@ -490,74 +493,73 @@ func (c *collector) collectConnection(ctx *types.ScrapeContext, ch chan<- promet
 
 	for _, connection := range dst {
 		ch <- prometheus.MustNewConstMetric(
-			c.ConnectionBandwidthSavingsUsingDFSReplicationTotal,
+			c.connectionBandwidthSavingsUsingDFSReplicationTotal,
 			prometheus.CounterValue,
 			connection.BandwidthSavingsUsingDFSReplicationTotal,
 			connection.Name,
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.ConnectionBytesReceivedTotal,
+			c.connectionBytesReceivedTotal,
 			prometheus.CounterValue,
 			connection.BytesReceivedTotal,
 			connection.Name,
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.ConnectionCompressedSizeOfFilesReceivedTotal,
+			c.connectionCompressedSizeOfFilesReceivedTotal,
 			prometheus.CounterValue,
 			connection.CompressedSizeOfFilesReceivedTotal,
 			connection.Name,
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.ConnectionFilesReceivedTotal,
+			c.connectionFilesReceivedTotal,
 			prometheus.CounterValue,
 			connection.FilesReceivedTotal,
 			connection.Name,
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.ConnectionRDCBytesReceivedTotal,
+			c.connectionRDCBytesReceivedTotal,
 			prometheus.CounterValue,
 			connection.RDCBytesReceivedTotal,
 			connection.Name,
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.ConnectionRDCCompressedSizeOfFilesReceivedTotal,
+			c.connectionRDCCompressedSizeOfFilesReceivedTotal,
 			prometheus.CounterValue,
 			connection.RDCCompressedSizeOfFilesReceivedTotal,
 			connection.Name,
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.ConnectionRDCSizeOfFilesReceivedTotal,
+			c.connectionRDCSizeOfFilesReceivedTotal,
 			prometheus.CounterValue,
 			connection.RDCSizeOfFilesReceivedTotal,
 			connection.Name,
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.ConnectionRDCNumberofFilesReceivedTotal,
+			c.connectionRDCNumberofFilesReceivedTotal,
 			prometheus.CounterValue,
 			connection.RDCNumberofFilesReceivedTotal,
 			connection.Name,
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.ConnectionSizeOfFilesReceivedTotal,
+			c.connectionSizeOfFilesReceivedTotal,
 			prometheus.CounterValue,
 			connection.SizeOfFilesReceivedTotal,
 			connection.Name,
 		)
-
 	}
 	return nil
 }
 
-// PerflibDFSRFolder Perflib: "DFS Replicated Folder"
-type PerflibDFSRFolder struct {
+// perflibDFSRFolder Perflib: "DFS Replicated Folder"
+type perflibDFSRFolder struct {
 	Name string
 
 	BandwidthSavingsUsingDFSReplicationTotal float64 `perflib:"Bandwidth Savings Using DFS Replication"`
@@ -566,7 +568,7 @@ type PerflibDFSRFolder struct {
 	ConflictBytesGeneratedTotal              float64 `perflib:"Conflict Bytes Generated"`
 	ConflictFilesCleanedUpTotal              float64 `perflib:"Conflict Files Cleaned Up"`
 	ConflictFilesGeneratedTotal              float64 `perflib:"Conflict Files Generated"`
-	ConflictFolderCleanupsCompletedTotal     float64 `perflib:"Conflict Folder Cleanups Completed"`
+	ConflictFolderCleanupsCompletedTotal     float64 `perflib:"Conflict folder Cleanups Completed"`
 	ConflictSpaceInUse                       float64 `perflib:"Conflict Space In Use"`
 	DeletedSpaceInUse                        float64 `perflib:"Deleted Space In Use"`
 	DeletedBytesCleanedUpTotal               float64 `perflib:"Deleted Bytes Cleaned Up"`
@@ -589,197 +591,197 @@ type PerflibDFSRFolder struct {
 	UpdatesDroppedTotal                      float64 `perflib:"Updates Dropped"`
 }
 
-func (c *collector) collectFolder(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
-	var dst []PerflibDFSRFolder
+func (c *Collector) collectFolder(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+	var dst []perflibDFSRFolder
 	if err := perflib.UnmarshalObject(ctx.PerfObjects["DFS Replicated Folders"], &dst, c.logger); err != nil {
 		return err
 	}
 
 	for _, folder := range dst {
 		ch <- prometheus.MustNewConstMetric(
-			c.FolderBandwidthSavingsUsingDFSReplicationTotal,
+			c.folderBandwidthSavingsUsingDFSReplicationTotal,
 			prometheus.CounterValue,
 			folder.BandwidthSavingsUsingDFSReplicationTotal,
 			folder.Name,
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.FolderCompressedSizeOfFilesReceivedTotal,
+			c.folderCompressedSizeOfFilesReceivedTotal,
 			prometheus.CounterValue,
 			folder.CompressedSizeOfFilesReceivedTotal,
 			folder.Name,
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.FolderConflictBytesCleanedupTotal,
+			c.folderConflictBytesCleanedupTotal,
 			prometheus.CounterValue,
 			folder.ConflictBytesCleanedupTotal,
 			folder.Name,
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.FolderConflictBytesGeneratedTotal,
+			c.folderConflictBytesGeneratedTotal,
 			prometheus.CounterValue,
 			folder.ConflictBytesGeneratedTotal,
 			folder.Name,
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.FolderConflictFilesCleanedUpTotal,
+			c.folderConflictFilesCleanedUpTotal,
 			prometheus.CounterValue,
 			folder.ConflictFilesCleanedUpTotal,
 			folder.Name,
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.FolderConflictFilesGeneratedTotal,
+			c.folderConflictFilesGeneratedTotal,
 			prometheus.CounterValue,
 			folder.ConflictFilesGeneratedTotal,
 			folder.Name,
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.FolderConflictFolderCleanupsCompletedTotal,
+			c.folderConflictfolderCleanupsCompletedTotal,
 			prometheus.CounterValue,
 			folder.ConflictFolderCleanupsCompletedTotal,
 			folder.Name,
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.FolderConflictSpaceInUse,
+			c.folderConflictSpaceInUse,
 			prometheus.GaugeValue,
 			folder.ConflictSpaceInUse,
 			folder.Name,
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.FolderDeletedSpaceInUse,
+			c.folderDeletedSpaceInUse,
 			prometheus.GaugeValue,
 			folder.DeletedSpaceInUse,
 			folder.Name,
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.FolderDeletedBytesCleanedUpTotal,
+			c.folderDeletedBytesCleanedUpTotal,
 			prometheus.CounterValue,
 			folder.DeletedBytesCleanedUpTotal,
 			folder.Name,
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.FolderDeletedBytesGeneratedTotal,
+			c.folderDeletedBytesGeneratedTotal,
 			prometheus.CounterValue,
 			folder.DeletedBytesGeneratedTotal,
 			folder.Name,
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.FolderDeletedFilesCleanedUpTotal,
+			c.folderDeletedFilesCleanedUpTotal,
 			prometheus.CounterValue,
 			folder.DeletedFilesCleanedUpTotal,
 			folder.Name,
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.FolderDeletedFilesGeneratedTotal,
+			c.folderDeletedFilesGeneratedTotal,
 			prometheus.CounterValue,
 			folder.DeletedFilesGeneratedTotal,
 			folder.Name,
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.FolderFileInstallsRetriedTotal,
+			c.folderFileInstallsRetriedTotal,
 			prometheus.CounterValue,
 			folder.FileInstallsRetriedTotal,
 			folder.Name,
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.FolderFileInstallsSucceededTotal,
+			c.folderFileInstallsSucceededTotal,
 			prometheus.CounterValue,
 			folder.FileInstallsSucceededTotal,
 			folder.Name,
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.FolderFilesReceivedTotal,
+			c.folderFilesReceivedTotal,
 			prometheus.CounterValue,
 			folder.FilesReceivedTotal,
 			folder.Name,
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.FolderRDCBytesReceivedTotal,
+			c.folderRDCBytesReceivedTotal,
 			prometheus.CounterValue,
 			folder.RDCBytesReceivedTotal,
 			folder.Name,
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.FolderRDCCompressedSizeOfFilesReceivedTotal,
+			c.folderRDCCompressedSizeOfFilesReceivedTotal,
 			prometheus.CounterValue,
 			folder.RDCCompressedSizeOfFilesReceivedTotal,
 			folder.Name,
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.FolderRDCNumberofFilesReceivedTotal,
+			c.folderRDCNumberofFilesReceivedTotal,
 			prometheus.CounterValue,
 			folder.RDCNumberofFilesReceivedTotal,
 			folder.Name,
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.FolderRDCSizeOfFilesReceivedTotal,
+			c.folderRDCSizeOfFilesReceivedTotal,
 			prometheus.CounterValue,
 			folder.RDCSizeOfFilesReceivedTotal,
 			folder.Name,
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.FolderSizeOfFilesReceivedTotal,
+			c.folderSizeOfFilesReceivedTotal,
 			prometheus.CounterValue,
 			folder.SizeOfFilesReceivedTotal,
 			folder.Name,
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.FolderStagingSpaceInUse,
+			c.folderStagingSpaceInUse,
 			prometheus.GaugeValue,
 			folder.StagingSpaceInUse,
 			folder.Name,
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.FolderStagingBytesCleanedUpTotal,
+			c.folderStagingBytesCleanedUpTotal,
 			prometheus.CounterValue,
 			folder.StagingBytesCleanedUpTotal,
 			folder.Name,
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.FolderStagingBytesGeneratedTotal,
+			c.folderStagingBytesGeneratedTotal,
 			prometheus.CounterValue,
 			folder.StagingBytesGeneratedTotal,
 			folder.Name,
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.FolderStagingFilesCleanedUpTotal,
+			c.folderStagingFilesCleanedUpTotal,
 			prometheus.CounterValue,
 			folder.StagingFilesCleanedUpTotal,
 			folder.Name,
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.FolderStagingFilesGeneratedTotal,
+			c.folderStagingFilesGeneratedTotal,
 			prometheus.CounterValue,
 			folder.StagingFilesGeneratedTotal,
 			folder.Name,
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.FolderUpdatesDroppedTotal,
+			c.folderUpdatesDroppedTotal,
 			prometheus.CounterValue,
 			folder.UpdatesDroppedTotal,
 			folder.Name,
@@ -788,8 +790,8 @@ func (c *collector) collectFolder(ctx *types.ScrapeContext, ch chan<- prometheus
 	return nil
 }
 
-// PerflibDFSRVolume Perflib: "DFS Replication Service Volumes"
-type PerflibDFSRVolume struct {
+// perflibDFSRVolume Perflib: "DFS Replication Service Volumes"
+type perflibDFSRVolume struct {
 	Name string
 
 	DatabaseCommitsTotal           float64 `perflib:"Database Commits"`
@@ -799,48 +801,47 @@ type PerflibDFSRVolume struct {
 	USNJournalUnreadPercentage     float64 `perflib:"USN Journal Records Unread Percentage"`
 }
 
-func (c *collector) collectVolume(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
-	var dst []PerflibDFSRVolume
-	if err := perflib.UnmarshalObject(ctx.PerfObjects["DFS Replication Service Volumes"], &dst, c.logger); err != nil {
+func (c *Collector) collectVolume(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+	var dst []perflibDFSRVolume
+	if err := perflib.UnmarshalObject(ctx.PerfObjects["DFS Replication Service volumes"], &dst, c.logger); err != nil {
 		return err
 	}
 
 	for _, volume := range dst {
 		ch <- prometheus.MustNewConstMetric(
-			c.VolumeDatabaseLookupsTotal,
+			c.volumeDatabaseLookupsTotal,
 			prometheus.CounterValue,
 			volume.DatabaseLookupsTotal,
 			volume.Name,
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.VolumeDatabaseCommitsTotal,
+			c.volumeDatabaseCommitsTotal,
 			prometheus.CounterValue,
 			volume.DatabaseCommitsTotal,
 			volume.Name,
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.VolumeUSNJournalRecordsAcceptedTotal,
+			c.volumeUSNJournalRecordsAcceptedTotal,
 			prometheus.CounterValue,
 			volume.USNJournalRecordsAcceptedTotal,
 			volume.Name,
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.VolumeUSNJournalRecordsReadTotal,
+			c.volumeUSNJournalRecordsReadTotal,
 			prometheus.CounterValue,
 			volume.USNJournalRecordsReadTotal,
 			volume.Name,
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.VolumeUSNJournalUnreadPercentage,
+			c.volumeUSNJournalUnreadPercentage,
 			prometheus.GaugeValue,
 			volume.USNJournalUnreadPercentage,
 			volume.Name,
 		)
-
 	}
 	return nil
 }

pkg/collector/dhcp/dhcp.go

@@ -16,8 +16,8 @@ type Config struct{}
 
 var ConfigDefaults = Config{}
 
-// A collector is a Prometheus collector perflib DHCP metrics
-type collector struct {
+// A Collector is a Prometheus Collector perflib DHCP metrics
+type Collector struct {
 	logger log.Logger
 
 	PacketsReceivedTotal                             *prometheus.Desc
@@ -47,29 +47,34 @@ type collector struct {
 	FailoverBndupdDropped                            *prometheus.Desc
 }
 
-func New(logger log.Logger, _ *Config) types.Collector {
-	c := &collector{}
+func New(logger log.Logger, _ *Config) *Collector {
+	c := &Collector{}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(_ *kingpin.Application) types.Collector {
-	return &collector{}
+func NewWithFlags(_ *kingpin.Application) *Collector {
+	return &Collector{}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{"DHCP Server"}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	c.PacketsReceivedTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "packets_received_total"),
 		"Total number of packets received by the DHCP server (PacketsReceivedTotal)",
@@ -254,7 +259,7 @@ type dhcpPerf struct {
 	FailoverBndupdDropped                            float64 `perflib:"Failover: BndUpd Dropped."`
 }
 
-func (c *collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	var dhcpPerfs []dhcpPerf
 	if err := perflib.UnmarshalObject(ctx.PerfObjects["DHCP Server"], &dhcpPerfs, c.logger); err != nil {
 		return err

pkg/collector/diskdrive/diskdrive.go

@@ -23,8 +23,8 @@ type Config struct{}
 
 var ConfigDefaults = Config{}
 
-// A collector is a Prometheus collector for a few WMI metrics in Win32_DiskDrive
-type collector struct {
+// A Collector is a Prometheus Collector for a few WMI metrics in Win32_DiskDrive
+type Collector struct {
 	logger log.Logger
 
 	DiskInfo     *prometheus.Desc
@@ -34,29 +34,34 @@ type collector struct {
 	Availability *prometheus.Desc
 }
 
-func New(logger log.Logger, _ *Config) types.Collector {
-	c := &collector{}
+func New(logger log.Logger, _ *Config) *Collector {
+	c := &Collector{}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(_ *kingpin.Application) types.Collector {
-	return &collector{}
+func NewWithFlags(_ *kingpin.Application) *Collector {
+	return &Collector{}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	c.DiskInfo = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "info"),
 		"General drive information",
@@ -149,7 +154,7 @@ var (
 )
 
 // Collect sends the metric values for each metric to the provided prometheus Metric channel.
-func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	if err := c.collect(ch); err != nil {
 		_ = level.Error(c.logger).Log("msg", "failed collecting disk_drive_info metrics", "err", err)
 		return err
@@ -157,7 +162,7 @@ func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric)
 	return nil
 }
 
-func (c *collector) collect(ch chan<- prometheus.Metric) error {
+func (c *Collector) collect(ch chan<- prometheus.Metric) error {
 	var dst []Win32_DiskDrive
 
 	if err := wmi.Query(win32DiskQuery, &dst); err != nil {

pkg/collector/dns/dns.go

@@ -19,8 +19,8 @@ type Config struct{}
 
 var ConfigDefaults = Config{}
 
-// A collector is a Prometheus collector for WMI Win32_PerfRawData_DNS_DNS metrics
-type collector struct {
+// A Collector is a Prometheus Collector for WMI Win32_PerfRawData_DNS_DNS metrics
+type Collector struct {
 	logger log.Logger
 
 	ZoneTransferRequestsReceived  *prometheus.Desc
@@ -47,29 +47,34 @@ type collector struct {
 	UnmatchedResponsesReceived    *prometheus.Desc
 }
 
-func New(logger log.Logger, _ *Config) types.Collector {
-	c := &collector{}
+func New(logger log.Logger, _ *Config) *Collector {
+	c := &Collector{}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(_ *kingpin.Application) types.Collector {
-	return &collector{}
+func NewWithFlags(_ *kingpin.Application) *Collector {
+	return &Collector{}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	c.ZoneTransferRequestsReceived = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "zone_transfer_requests_received_total"),
 		"Number of zone transfer requests (AXFR/IXFR) received by the master DNS server",
@@ -207,7 +212,7 @@ func (c *collector) Build() error {
 
 // Collect sends the metric values for each metric
 // to the provided prometheus Metric channel.
-func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	if err := c.collect(ch); err != nil {
 		_ = level.Error(c.logger).Log("msg", "failed collecting dns metrics", "err", err)
 		return err
@@ -261,7 +266,7 @@ type Win32_PerfRawData_DNS_DNS struct {
 	ZoneTransferSOARequestSent     uint32
 }
 
-func (c *collector) collect(ch chan<- prometheus.Metric) error {
+func (c *Collector) collect(ch chan<- prometheus.Metric) error {
 	var dst []Win32_PerfRawData_DNS_DNS
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {

pkg/collector/exchange/exchange.go

@@ -17,11 +17,7 @@ import (
 	"github.com/prometheus/client_golang/prometheus"
 )
 
-const (
-	Name                          = "exchange"
-	FlagExchangeListAllCollectors = "collectors.exchange.list"
-	FlagExchangeCollectorsEnabled = "collectors.exchange.enabled"
-)
+const Name = "exchange"
 
 type Config struct {
 	CollectorsEnabled string `yaml:"collectors_enabled"`
@@ -31,7 +27,7 @@ var ConfigDefaults = Config{
 	CollectorsEnabled: "",
 }
 
-type collector struct {
+type Collector struct {
 	logger log.Logger
 
 	exchangeListAllCollectors *bool
@@ -79,7 +75,7 @@ type collector struct {
 	enabledCollectors []string
 }
 
-// All available collector functions
+// All available Collector functions
 var exchangeAllCollectorNames = []string{
 	"ADAccessProcesses",
 	"TransportQueues",
@@ -93,43 +89,44 @@ var exchangeAllCollectorNames = []string{
 	"MapiHttpEmsmdb",
 }
 
-func New(logger log.Logger, config *Config) types.Collector {
+func New(logger log.Logger, config *Config) *Collector {
 	if config == nil {
 		config = &ConfigDefaults
 	}
 
 	exchangeListAllCollectors := false
-	c := &collector{
+	c := &Collector{
 		exchangeCollectorsEnabled: &config.CollectorsEnabled,
 		exchangeListAllCollectors: &exchangeListAllCollectors,
 	}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(app *kingpin.Application) types.Collector {
-	return &collector{
+func NewWithFlags(app *kingpin.Application) *Collector {
+	return &Collector{
 		exchangeListAllCollectors: app.Flag(
-			FlagExchangeListAllCollectors,
+			"collectors.exchange.list",
 			"List the collectors along with their perflib object name/ids",
 		).Bool(),
 
 		exchangeCollectorsEnabled: app.Flag(
-			FlagExchangeCollectorsEnabled,
+			"collectors.exchange.enabled",
 			"Comma-separated list of collectors to use. Defaults to all, if not specified.",
 		).Default(ConfigDefaults.CollectorsEnabled).String(),
 	}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{
 		"MSExchange ADAccess Processes",
 		"MSExchangeTransport Queues",
@@ -144,7 +141,11 @@ func (c *collector) GetPerfCounter() ([]string, error) {
 	}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	// desc creates a new prometheus description
 	desc := func(metricName string, description string, labels ...string) *prometheus.Desc {
 		return prometheus.NewDesc(
@@ -210,10 +211,11 @@ func (c *collector) Build() error {
 	}
 
 	if *c.exchangeListAllCollectors {
-		fmt.Printf("%-32s %-32s\n", "Collector Name", "[PerfID] Perflib Object")
+		fmt.Printf("%-32s %-32s\n", "Collector Name", "[PerfID] Perflib Object") //nolint:forbidigo
 		for _, cname := range exchangeAllCollectorNames {
-			fmt.Printf("%-32s %-32s\n", cname, collectorDesc[cname])
+			fmt.Printf("%-32s %-32s\n", cname, collectorDesc[cname]) //nolint:forbidigo
 		}
+
 		os.Exit(0)
 	}
 
@@ -235,7 +237,7 @@ func (c *collector) Build() error {
 }
 
 // Collect collects exchange metrics and sends them to prometheus
-func (c *collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	collectorFuncs := map[string]func(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error{
 		"ADAccessProcesses":   c.collectADAccessProcesses,
 		"TransportQueues":     c.collectTransportQueues,
@@ -269,7 +271,7 @@ type perflibADAccessProcesses struct {
 	LongRunningLDAPOperationsPerMin float64 `perflib:"Long Running LDAP Operations/min"`
 }
 
-func (c *collector) collectADAccessProcesses(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) collectADAccessProcesses(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	var data []perflibADAccessProcesses
 	if err := perflib.UnmarshalObject(ctx.PerfObjects["MSExchange ADAccess Processes"], &data, c.logger); err != nil {
 		return err
@@ -327,7 +329,7 @@ type perflibAvailabilityService struct {
 	RequestsSec float64 `perflib:"Availability Requests (sec)"`
 }
 
-func (c *collector) collectAvailabilityService(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) collectAvailabilityService(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	var data []perflibAvailabilityService
 	if err := perflib.UnmarshalObject(ctx.PerfObjects["MSExchange Availability Service"], &data, c.logger); err != nil {
 		return err
@@ -355,7 +357,7 @@ type perflibHTTPProxy struct {
 	ProxyRequestsPerSec                float64 `perflib:"Proxy Requests/Sec"`
 }
 
-func (c *collector) collectHTTPProxy(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) collectHTTPProxy(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	var data []perflibHTTPProxy
 	if err := perflib.UnmarshalObject(ctx.PerfObjects["MSExchange HttpProxy"], &data, c.logger); err != nil {
 		return err
@@ -409,7 +411,7 @@ type perflibOWA struct {
 	RequestsPerSec     float64 `perflib:"Requests/sec"`
 }
 
-func (c *collector) collectOWA(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) collectOWA(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	var data []perflibOWA
 	if err := perflib.UnmarshalObject(ctx.PerfObjects["MSExchange OWA"], &data, c.logger); err != nil {
 		return err
@@ -437,7 +439,7 @@ type perflibActiveSync struct {
 	SyncCommandsPerSec  float64 `perflib:"Sync Commands/sec"`
 }
 
-func (c *collector) collectActiveSync(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) collectActiveSync(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	var data []perflibActiveSync
 	if err := perflib.UnmarshalObject(ctx.PerfObjects["MSExchange ActiveSync"], &data, c.logger); err != nil {
 		return err
@@ -473,7 +475,7 @@ type perflibRPCClientAccess struct {
 	UserCount           float64 `perflib:"User Count"`
 }
 
-func (c *collector) collectRPC(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) collectRPC(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	var data []perflibRPCClientAccess
 	if err := perflib.UnmarshalObject(ctx.PerfObjects["MSExchange RpcClientAccess"], &data, c.logger); err != nil {
 		return err
@@ -529,7 +531,7 @@ type perflibTransportQueues struct {
 	PoisonQueueLength                       float64 `perflib:"Poison Queue Length"`
 }
 
-func (c *collector) collectTransportQueues(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) collectTransportQueues(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	var data []perflibTransportQueues
 	if err := perflib.UnmarshalObject(ctx.PerfObjects["MSExchangeTransport Queues"], &data, c.logger); err != nil {
 		return err
@@ -603,7 +605,7 @@ type perflibWorkloadManagementWorkloads struct {
 	IsActive       float64 `perflib:"Active"`
 }
 
-func (c *collector) collectWorkloadManagementWorkloads(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) collectWorkloadManagementWorkloads(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	var data []perflibWorkloadManagementWorkloads
 	if err := perflib.UnmarshalObject(ctx.PerfObjects["MSExchange WorkloadManagement Workloads"], &data, c.logger); err != nil {
 		return err
@@ -654,7 +656,7 @@ type perflibAutodiscover struct {
 	RequestsPerSec float64 `perflib:"Requests/sec"`
 }
 
-func (c *collector) collectAutoDiscover(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) collectAutoDiscover(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	var data []perflibAutodiscover
 	if err := perflib.UnmarshalObject(ctx.PerfObjects["MSExchangeAutodiscover"], &data, c.logger); err != nil {
 		return err
@@ -674,7 +676,7 @@ type perflibMapiHttpEmsmdb struct {
 	ActiveUserCount float64 `perflib:"Active User Count"`
 }
 
-func (c *collector) collectMapiHttpEmsmdb(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) collectMapiHttpEmsmdb(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	var data []perflibMapiHttpEmsmdb
 	if err := perflib.UnmarshalObject(ctx.PerfObjects["MSExchange MapiHttp Emsmdb"], &data, c.logger); err != nil {
 		return err
@@ -692,13 +694,13 @@ func (c *collector) collectMapiHttpEmsmdb(ctx *types.ScrapeContext, ch chan<- pr
 }
 
 // toLabelName converts strings to lowercase and replaces all whitespaces and dots with underscores
-func (c *collector) toLabelName(name string) string {
+func (c *Collector) toLabelName(name string) string {
 	s := strings.ReplaceAll(strings.Join(strings.Fields(strings.ToLower(name)), "_"), ".", "_")
 	s = strings.ReplaceAll(s, "__", "_")
 	return s
 }
 
 // msToSec converts from ms to seconds
-func (c *collector) msToSec(t float64) float64 {
+func (c *Collector) msToSec(t float64) float64 {
 	return t / 1000
 }

pkg/collector/fsrmquota/fsrmquota.go

@@ -3,13 +3,12 @@
 package fsrmquota
 
 import (
-	"github.com/prometheus-community/windows_exporter/pkg/types"
-	"github.com/prometheus-community/windows_exporter/pkg/utils"
-	"github.com/prometheus-community/windows_exporter/pkg/wmi"
-
 	"github.com/alecthomas/kingpin/v2"
 	"github.com/go-kit/log"
 	"github.com/go-kit/log/level"
+	"github.com/prometheus-community/windows_exporter/pkg/types"
+	"github.com/prometheus-community/windows_exporter/pkg/utils"
+	"github.com/prometheus-community/windows_exporter/pkg/wmi"
 	"github.com/prometheus/client_golang/prometheus"
 )
 
@@ -19,7 +18,7 @@ type Config struct{}
 
 var ConfigDefaults = Config{}
 
-type collector struct {
+type Collector struct {
 	logger log.Logger
 
 	QuotasCount *prometheus.Desc
@@ -35,29 +34,34 @@ type collector struct {
 	Template        *prometheus.Desc
 }
 
-func New(logger log.Logger, _ *Config) types.Collector {
-	c := &collector{}
+func New(logger log.Logger, _ *Config) *Collector {
+	c := &Collector{}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(_ *kingpin.Application) types.Collector {
-	return &collector{}
+func NewWithFlags(_ *kingpin.Application) *Collector {
+	return &Collector{}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	c.QuotasCount = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "count"),
 		"Number of Quotas",
@@ -117,7 +121,7 @@ func (c *collector) Build() error {
 
 // Collect sends the metric values for each metric
 // to the provided prometheus Metric channel.
-func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	if err := c.collect(ch); err != nil {
 		_ = level.Error(c.logger).Log("msg", "failed collecting fsrmquota metrics", "err", err)
 		return err
@@ -142,7 +146,7 @@ type MSFT_FSRMQuota struct {
 	SoftLimit       bool
 }
 
-func (c *collector) collect(ch chan<- prometheus.Metric) error {
+func (c *Collector) collect(ch chan<- prometheus.Metric) error {
 	var dst []MSFT_FSRMQuota
 	q := wmi.QueryAll(&dst, c.logger)
 
@@ -153,7 +157,6 @@ func (c *collector) collect(ch chan<- prometheus.Metric) error {
 	}
 
 	for _, quota := range dst {
-
 		count++
 		path := quota.Path
 		template := quota.Template

pkg/collector/handler.go

@@ -11,7 +11,6 @@ import (
 
 	"github.com/go-kit/log"
 	"github.com/go-kit/log/level"
-	"github.com/prometheus-community/windows_exporter/pkg/types"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/collectors"
 	"github.com/prometheus/client_golang/prometheus/collectors/version"
@@ -20,7 +19,7 @@ import (
 
 func (c *Collectors) BuildServeHTTP(disableExporterMetrics bool, timeoutMargin float64) http.HandlerFunc {
 	collectorFactory := func(timeout time.Duration, requestedCollectors []string) (error, *Prometheus) {
-		filteredCollectors := make(map[string]types.Collector)
+		filteredCollectors := make(map[string]Collector)
 		// scrape all enabled collectors if no collector is requested
 		if len(requestedCollectors) == 0 {
 			filteredCollectors = c.collectors

pkg/collector/hyperv/hyperv.go

@@ -6,12 +6,11 @@ import (
 	"fmt"
 	"strings"
 
-	"github.com/prometheus-community/windows_exporter/pkg/types"
-	"github.com/prometheus-community/windows_exporter/pkg/wmi"
-
 	"github.com/alecthomas/kingpin/v2"
 	"github.com/go-kit/log"
 	"github.com/go-kit/log/level"
+	"github.com/prometheus-community/windows_exporter/pkg/types"
+	"github.com/prometheus-community/windows_exporter/pkg/wmi"
 	"github.com/prometheus/client_golang/prometheus"
 )
 
@@ -21,8 +20,8 @@ type Config struct{}
 
 var ConfigDefaults = Config{}
 
-// collector is a Prometheus collector for hyper-v
-type collector struct {
+// Collector is a Prometheus Collector for hyper-v
+type Collector struct {
 	logger log.Logger
 
 	// Win32_PerfRawData_VmmsVirtualMachineStats_HyperVVirtualMachineHealthSummary
@@ -140,29 +139,34 @@ type collector struct {
 	VMMemoryRemovedMemory              *prometheus.Desc
 }
 
-func New(logger log.Logger, _ *Config) types.Collector {
-	c := &collector{}
+func New(logger log.Logger, _ *Config) *Collector {
+	c := &Collector{}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(_ *kingpin.Application) types.Collector {
-	return &collector{}
+func NewWithFlags(_ *kingpin.Application) *Collector {
+	return &Collector{}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	buildSubsystemName := func(component string) string { return "hyperv_" + component }
 
 	c.HealthCritical = prometheus.NewDesc(
@@ -742,7 +746,7 @@ func (c *collector) Build() error {
 
 // Collect sends the metric values for each metric
 // to the provided prometheus Metric channel.
-func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	if err := c.collectVmHealth(ch); err != nil {
 		_ = level.Error(c.logger).Log("msg", "failed collecting hyperV health status metrics", "err", err)
 		return err
@@ -812,7 +816,7 @@ type Win32_PerfRawData_VmmsVirtualMachineStats_HyperVVirtualMachineHealthSummary
 	HealthOk       uint32
 }
 
-func (c *collector) collectVmHealth(ch chan<- prometheus.Metric) error {
+func (c *Collector) collectVmHealth(ch chan<- prometheus.Metric) error {
 	var dst []Win32_PerfRawData_VmmsVirtualMachineStats_HyperVVirtualMachineHealthSummary
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {
@@ -831,7 +835,6 @@ func (c *collector) collectVmHealth(ch chan<- prometheus.Metric) error {
 			prometheus.GaugeValue,
 			float64(health.HealthOk),
 		)
-
 	}
 
 	return nil
@@ -845,7 +848,7 @@ type Win32_PerfRawData_VidPerfProvider_HyperVVMVidPartition struct {
 	RemotePhysicalPages    uint64
 }
 
-func (c *collector) collectVmVid(ch chan<- prometheus.Metric) error {
+func (c *Collector) collectVmVid(ch chan<- prometheus.Metric) error {
 	var dst []Win32_PerfRawData_VidPerfProvider_HyperVVMVidPartition
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {
@@ -877,7 +880,6 @@ func (c *collector) collectVmVid(ch chan<- prometheus.Metric) error {
 			float64(page.RemotePhysicalPages),
 			page.Name,
 		)
-
 	}
 
 	return nil
@@ -909,7 +911,7 @@ type Win32_PerfRawData_HvStats_HyperVHypervisorRootPartition struct {
 	VirtualTLBPages               uint64
 }
 
-func (c *collector) collectVmHv(ch chan<- prometheus.Metric) error {
+func (c *Collector) collectVmHv(ch chan<- prometheus.Metric) error {
 	var dst []Win32_PerfRawData_HvStats_HyperVHypervisorRootPartition
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {
@@ -1035,7 +1037,6 @@ func (c *collector) collectVmHv(ch chan<- prometheus.Metric) error {
 			prometheus.GaugeValue,
 			float64(obj.VirtualTLBPages),
 		)
-
 	}
 
 	return nil
@@ -1047,7 +1048,7 @@ type Win32_PerfRawData_HvStats_HyperVHypervisor struct {
 	VirtualProcessors uint64
 }
 
-func (c *collector) collectVmProcessor(ch chan<- prometheus.Metric) error {
+func (c *Collector) collectVmProcessor(ch chan<- prometheus.Metric) error {
 	var dst []Win32_PerfRawData_HvStats_HyperVHypervisor
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {
@@ -1055,7 +1056,6 @@ func (c *collector) collectVmProcessor(ch chan<- prometheus.Metric) error {
 	}
 
 	for _, obj := range dst {
-
 		ch <- prometheus.MustNewConstMetric(
 			c.LogicalProcessors,
 			prometheus.GaugeValue,
@@ -1067,7 +1067,6 @@ func (c *collector) collectVmProcessor(ch chan<- prometheus.Metric) error {
 			prometheus.GaugeValue,
 			float64(obj.VirtualProcessors),
 		)
-
 	}
 
 	return nil
@@ -1081,7 +1080,7 @@ type Win32_PerfRawData_HvStats_HyperVHypervisorLogicalProcessor struct {
 	PercentTotalRunTime      uint
 }
 
-func (c *collector) collectHostLPUsage(ch chan<- prometheus.Metric) error {
+func (c *Collector) collectHostLPUsage(ch chan<- prometheus.Metric) error {
 	var dst []Win32_PerfRawData_HvStats_HyperVHypervisorLogicalProcessor
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {
@@ -1120,7 +1119,6 @@ func (c *collector) collectHostLPUsage(ch chan<- prometheus.Metric) error {
 			float64(obj.PercentTotalRunTime),
 			coreId,
 		)
-
 	}
 
 	return nil
@@ -1136,7 +1134,7 @@ type Win32_PerfRawData_HvStats_HyperVHypervisorRootVirtualProcessor struct {
 	CPUWaitTimePerDispatch   uint64
 }
 
-func (c *collector) collectHostCpuUsage(ch chan<- prometheus.Metric) error {
+func (c *Collector) collectHostCpuUsage(ch chan<- prometheus.Metric) error {
 	var dst []Win32_PerfRawData_HvStats_HyperVHypervisorRootVirtualProcessor
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {
@@ -1204,7 +1202,7 @@ type Win32_PerfRawData_HvStats_HyperVHypervisorVirtualProcessor struct {
 	CPUWaitTimePerDispatch   uint64
 }
 
-func (c *collector) collectVmCpuUsage(ch chan<- prometheus.Metric) error {
+func (c *Collector) collectVmCpuUsage(ch chan<- prometheus.Metric) error {
 	var dst []Win32_PerfRawData_HvStats_HyperVHypervisorVirtualProcessor
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {
@@ -1263,7 +1261,6 @@ func (c *collector) collectVmCpuUsage(ch chan<- prometheus.Metric) error {
 			float64(obj.CPUWaitTimePerDispatch),
 			vmName, coreId,
 		)
-
 	}
 
 	return nil
@@ -1298,7 +1295,7 @@ type Win32_PerfRawData_NvspSwitchStats_HyperVVirtualSwitch struct {
 	PurgedMacAddressesPersec               uint64
 }
 
-func (c *collector) collectVmSwitch(ch chan<- prometheus.Metric) error {
+func (c *Collector) collectVmSwitch(ch chan<- prometheus.Metric) error {
 	var dst []Win32_PerfRawData_NvspSwitchStats_HyperVVirtualSwitch
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {
@@ -1463,7 +1460,7 @@ type Win32_PerfRawData_EthernetPerfProvider_HyperVLegacyNetworkAdapter struct {
 	FramesSentPersec     uint64
 }
 
-func (c *collector) collectVmEthernet(ch chan<- prometheus.Metric) error {
+func (c *Collector) collectVmEthernet(ch chan<- prometheus.Metric) error {
 	var dst []Win32_PerfRawData_EthernetPerfProvider_HyperVLegacyNetworkAdapter
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {
@@ -1516,7 +1513,6 @@ func (c *collector) collectVmEthernet(ch chan<- prometheus.Metric) error {
 			float64(obj.FramesSentPersec),
 			obj.Name,
 		)
-
 	}
 
 	return nil
@@ -1533,7 +1529,7 @@ type Win32_PerfRawData_Counters_HyperVVirtualStorageDevice struct {
 	WriteOperationsPerSec uint64
 }
 
-func (c *collector) collectVmStorage(ch chan<- prometheus.Metric) error {
+func (c *Collector) collectVmStorage(ch chan<- prometheus.Metric) error {
 	var dst []Win32_PerfRawData_Counters_HyperVVirtualStorageDevice
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {
@@ -1602,7 +1598,7 @@ type Win32_PerfRawData_NvspNicStats_HyperVVirtualNetworkAdapter struct {
 	PacketsSentPersec            uint64
 }
 
-func (c *collector) collectVmNetwork(ch chan<- prometheus.Metric) error {
+func (c *Collector) collectVmNetwork(ch chan<- prometheus.Metric) error {
 	var dst []Win32_PerfRawData_NvspNicStats_HyperVVirtualNetworkAdapter
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {
@@ -1675,7 +1671,7 @@ type Win32_PerfRawData_BalancerStats_HyperVDynamicMemoryVM struct {
 	RemovedMemory              uint64
 }
 
-func (c *collector) collectVmMemory(ch chan<- prometheus.Metric) error {
+func (c *Collector) collectVmMemory(ch chan<- prometheus.Metric) error {
 	var dst []Win32_PerfRawData_BalancerStats_HyperVDynamicMemoryVM
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {

pkg/collector/iis/iis.go

@@ -17,14 +17,7 @@ import (
 	"golang.org/x/sys/windows/registry"
 )
 
-const (
-	Name = "iis"
-
-	FlagIISSiteExclude = "collector.iis.site-exclude"
-	FlagIISSiteInclude = "collector.iis.site-include"
-	FlagIISAppExclude  = "collector.iis.app-exclude"
-	FlagIISAppInclude  = "collector.iis.app-include"
-)
+const Name = "iis"
 
 type Config struct {
 	SiteInclude string `yaml:"site_include"`
@@ -77,7 +70,7 @@ func getIISVersion(logger log.Logger) simple_version {
 	}
 }
 
-type collector struct {
+type Collector struct {
 	logger log.Logger
 
 	siteInclude *string
@@ -220,40 +213,41 @@ type collector struct {
 	iis_version simple_version
 }
 
-func New(logger log.Logger, config *Config) types.Collector {
+func New(logger log.Logger, config *Config) *Collector {
 	if config == nil {
 		config = &ConfigDefaults
 	}
 
-	c := &collector{
+	c := &Collector{
 		appInclude:  &config.AppInclude,
 		appExclude:  &config.AppExclude,
 		siteInclude: &config.SiteInclude,
 		siteExclude: &config.SiteExclude,
 	}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(app *kingpin.Application) types.Collector {
-	c := &collector{
+func NewWithFlags(app *kingpin.Application) *Collector {
+	c := &Collector{
 		siteInclude: app.Flag(
-			FlagIISSiteInclude,
+			"collector.iis.site-include",
 			"Regexp of sites to include. Site name must both match include and not match exclude to be included.",
 		).Default(ConfigDefaults.SiteInclude).String(),
 
 		siteExclude: app.Flag(
-			FlagIISSiteExclude,
+			"collector.iis.site-exclude",
 			"Regexp of sites to exclude. Site name must both match include and not match exclude to be included.",
 		).Default(ConfigDefaults.SiteExclude).String(),
 
 		appInclude: app.Flag(
-			FlagIISAppInclude,
+			"collector.iis.app-include",
 			"Regexp of apps to include. App name must both match include and not match exclude to be included.",
 		).Default(ConfigDefaults.AppInclude).String(),
 
 		appExclude: app.Flag(
-			FlagIISAppExclude,
+			"collector.iis.app-exclude",
 			"Regexp of apps to exclude. App name must both match include and not match exclude to be included.",
 		).Default(ConfigDefaults.AppExclude).String(),
 	}
@@ -261,15 +255,15 @@ func NewWithFlags(app *kingpin.Application) types.Collector {
 	return c
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{
 		"Web Service",
 		"APP_POOL_WAS",
@@ -278,7 +272,11 @@ func (c *collector) GetPerfCounter() ([]string, error) {
 	}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	c.iis_version = getIISVersion(c.logger)
 
 	var err error
@@ -925,7 +923,7 @@ func (c *collector) Build() error {
 
 // Collect sends the metric values for each metric
 // to the provided prometheus Metric channel.
-func (c *collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	if err := c.collectWebService(ctx, ch); err != nil {
 		_ = level.Error(c.logger).Log("msg", "failed collecting iis metrics", "err", err)
 		return err
@@ -1021,7 +1019,7 @@ type hasGetIISName interface {
 //
 // E.G. Given the following list of site names, "Site_B" would be
 // discarded, and "Site_B#2" would be kept and presented as "Site_B" in the
-// collector metrics.
+// Collector metrics.
 // [ "Site_A", "Site_B", "Site_C", "Site_B#2" ]
 func dedupIISNames[V hasGetIISName](services []V) map[string]V {
 	// Ensure IIS entry with the highest suffix occurs last
@@ -1039,7 +1037,7 @@ func dedupIISNames[V hasGetIISName](services []V) map[string]V {
 	return webServiceDeDuplicated
 }
 
-func (c *collector) collectWebService(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) collectWebService(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	var webService []perflibWebService
 	if err := perflib.UnmarshalObject(ctx.PerfObjects["Web Service"], &webService, c.logger); err != nil {
 		return err
@@ -1331,7 +1329,7 @@ var applicationStates = map[uint32]string{
 	7: "Delete Pending",
 }
 
-func (c *collector) collectAPP_POOL_WAS(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) collectAPP_POOL_WAS(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	var APP_POOL_WAS []perflibAPP_POOL_WAS
 	if err := perflib.UnmarshalObject(ctx.PerfObjects["APP_POOL_WAS"], &APP_POOL_WAS, c.logger); err != nil {
 		return err
@@ -1508,7 +1506,7 @@ type perflibW3SVC_W3WP_IIS8 struct {
 	WebSocketConnectionsRejected float64 `perflib:"WebSocket Connections Rejected / Sec"`
 }
 
-func (c *collector) collectW3SVC_W3WP(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) collectW3SVC_W3WP(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	var W3SVC_W3WP []perflibW3SVC_W3WP
 	if err := perflib.UnmarshalObject(ctx.PerfObjects["W3SVC_W3WP"], &W3SVC_W3WP, c.logger); err != nil {
 		return err
@@ -1764,7 +1762,6 @@ func (c *collector) collectW3SVC_W3WP(ctx *types.ScrapeContext, ch chan<- promet
 			name,
 			pid,
 		)
-
 	}
 
 	if c.iis_version.major >= 8 {
@@ -1906,7 +1903,7 @@ type perflibWebServiceCache struct {
 	ServiceCache_OutputCacheQueriesTotal       float64
 }
 
-func (c *collector) collectWebServiceCache(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) collectWebServiceCache(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	var WebServiceCache []perflibWebServiceCache
 	if err := perflib.UnmarshalObject(ctx.PerfObjects["Web Service Cache"], &WebServiceCache, c.logger); err != nil {
 		return err

pkg/collector/license/license.go

@@ -6,10 +6,9 @@ import (
 	"github.com/alecthomas/kingpin/v2"
 	"github.com/go-kit/log"
 	"github.com/go-kit/log/level"
-	"github.com/prometheus/client_golang/prometheus"
-
 	"github.com/prometheus-community/windows_exporter/pkg/headers/slc"
 	"github.com/prometheus-community/windows_exporter/pkg/types"
+	"github.com/prometheus/client_golang/prometheus"
 )
 
 const Name = "license"
@@ -26,36 +25,41 @@ type Config struct{}
 
 var ConfigDefaults = Config{}
 
-// A collector is a Prometheus collector for WMI Win32_PerfRawData_DNS_DNS metrics
-type collector struct {
+// A Collector is a Prometheus Collector for WMI Win32_PerfRawData_DNS_DNS metrics
+type Collector struct {
 	logger log.Logger
 
 	LicenseStatus *prometheus.Desc
 }
 
-func New(logger log.Logger, _ *Config) types.Collector {
-	c := &collector{}
+func New(logger log.Logger, _ *Config) *Collector {
+	c := &Collector{}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(_ *kingpin.Application) types.Collector {
-	return &collector{}
+func NewWithFlags(_ *kingpin.Application) *Collector {
+	return &Collector{}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	c.LicenseStatus = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "status"),
 		"Status of windows license",
@@ -68,7 +72,7 @@ func (c *collector) Build() error {
 
 // Collect sends the metric values for each metric
 // to the provided prometheus Metric channel.
-func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	if err := c.collect(ch); err != nil {
 		_ = level.Error(c.logger).Log("msg", "failed collecting license metrics", "err", err)
 		return err
@@ -76,7 +80,7 @@ func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric)
 	return nil
 }
 
-func (c *collector) collect(ch chan<- prometheus.Metric) error {
+func (c *Collector) collect(ch chan<- prometheus.Metric) error {
 	status, err := slc.SLIsWindowsGenuineLocal()
 	if err != nil {
 		return err

pkg/collector/logical_disk/logical_disk.go

@@ -10,22 +10,16 @@ import (
 	"strconv"
 	"strings"
 
-	"golang.org/x/sys/windows"
-
 	"github.com/alecthomas/kingpin/v2"
 	"github.com/go-kit/log"
 	"github.com/go-kit/log/level"
 	"github.com/prometheus-community/windows_exporter/pkg/perflib"
 	"github.com/prometheus-community/windows_exporter/pkg/types"
 	"github.com/prometheus/client_golang/prometheus"
+	"golang.org/x/sys/windows"
 )
 
-const (
-	Name = "logical_disk"
-
-	FlagLogicalDiskVolumeExclude = "collector.logical_disk.volume-exclude"
-	FlagLogicalDiskVolumeInclude = "collector.logical_disk.volume-include"
-)
+const Name = "logical_disk"
 
 type Config struct {
 	VolumeInclude string `yaml:"volume_include"`
@@ -37,8 +31,8 @@ var ConfigDefaults = Config{
 	VolumeExclude: "",
 }
 
-// A collector is a Prometheus collector for perflib logicalDisk metrics
-type collector struct {
+// A Collector is a Prometheus Collector for perflib logicalDisk metrics
+type Collector struct {
 	logger log.Logger
 
 	volumeInclude *string
@@ -75,27 +69,28 @@ type volumeInfo struct {
 	readonly     float64
 }
 
-func New(logger log.Logger, config *Config) types.Collector {
+func New(logger log.Logger, config *Config) *Collector {
 	if config == nil {
 		config = &ConfigDefaults
 	}
 
-	c := &collector{
+	c := &Collector{
 		volumeExclude: &config.VolumeExclude,
 		volumeInclude: &config.VolumeInclude,
 	}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(app *kingpin.Application) types.Collector {
-	c := &collector{
+func NewWithFlags(app *kingpin.Application) *Collector {
+	c := &Collector{
 		volumeInclude: app.Flag(
-			FlagLogicalDiskVolumeInclude,
+			"collector.logical_disk.volume-include",
 			"Regexp of volumes to include. Volume name must both match include and not match exclude to be included.",
 		).Default(ConfigDefaults.VolumeInclude).String(),
 		volumeExclude: app.Flag(
-			FlagLogicalDiskVolumeExclude,
+			"collector.logical_disk.volume-exclude",
 			"Regexp of volumes to exclude. Volume name must both match include and not match exclude to be included.",
 		).Default(ConfigDefaults.VolumeExclude).String(),
 	}
@@ -103,19 +98,23 @@ func NewWithFlags(app *kingpin.Application) types.Collector {
 	return c
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{"LogicalDisk"}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	c.Information = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "info"),
 		"A metric with a constant '1' value labeled with logical disk information",
@@ -256,7 +255,7 @@ func (c *collector) Build() error {
 
 // Collect sends the metric values for each metric
 // to the provided prometheus Metric channel.
-func (c *collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	if err := c.collect(ctx, ch); err != nil {
 		_ = level.Error(c.logger).Log("msg", "failed collecting logical_disk metrics", "err", err)
 		return err
@@ -287,7 +286,7 @@ type logicalDisk struct {
 	AvgDiskSecPerTransfer   float64 `perflib:"Avg. Disk sec/Transfer"`
 }
 
-func (c *collector) collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	var (
 		err    error
 		diskID string

pkg/collector/logical_disk/logical_disk_test.go

@@ -9,8 +9,8 @@ import (
 )
 
 func BenchmarkCollector(b *testing.B) {
-	// Whitelist is not set in testing context (kingpin flags not parsed), causing the collector to skip all disks.
+	// Whitelist is not set in testing context (kingpin flags not parsed), causing the Collector to skip all disks.
 	localVolumeInclude := ".+"
-	kingpin.CommandLine.GetArg(logical_disk.FlagLogicalDiskVolumeInclude).StringVar(&localVolumeInclude)
+	kingpin.CommandLine.GetArg("collector.logical_disk.volume-include").StringVar(&localVolumeInclude)
 	testutils.FuncBenchmarkCollector(b, "logical_disk", logical_disk.NewWithFlags)
 }

pkg/collector/logon/logon.go

@@ -5,12 +5,11 @@ package logon
 import (
 	"errors"
 
-	"github.com/prometheus-community/windows_exporter/pkg/types"
-	"github.com/prometheus-community/windows_exporter/pkg/wmi"
-
 	"github.com/alecthomas/kingpin/v2"
 	"github.com/go-kit/log"
 	"github.com/go-kit/log/level"
+	"github.com/prometheus-community/windows_exporter/pkg/types"
+	"github.com/prometheus-community/windows_exporter/pkg/wmi"
 	"github.com/prometheus/client_golang/prometheus"
 )
 
@@ -20,36 +19,41 @@ type Config struct{}
 
 var ConfigDefaults = Config{}
 
-// A collector is a Prometheus collector for WMI metrics
-type collector struct {
+// A Collector is a Prometheus Collector for WMI metrics
+type Collector struct {
 	logger log.Logger
 
 	LogonType *prometheus.Desc
 }
 
-func New(logger log.Logger, _ *Config) types.Collector {
-	c := &collector{}
+func New(logger log.Logger, _ *Config) *Collector {
+	c := &Collector{}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(_ *kingpin.Application) types.Collector {
-	return &collector{}
+func NewWithFlags(_ *kingpin.Application) *Collector {
+	return &Collector{}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	c.LogonType = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "logon_type"),
 		"Number of active logon sessions (LogonSession.LogonType)",
@@ -61,7 +65,7 @@ func (c *collector) Build() error {
 
 // Collect sends the metric values for each metric
 // to the provided prometheus Metric channel.
-func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	if err := c.collect(ch); err != nil {
 		_ = level.Error(c.logger).Log("msg", "failed collecting user metrics", "err", err)
 		return err
@@ -75,7 +79,7 @@ type Win32_LogonSession struct {
 	LogonType uint32
 }
 
-func (c *collector) collect(ch chan<- prometheus.Metric) error {
+func (c *Collector) collect(ch chan<- prometheus.Metric) error {
 	var dst []Win32_LogonSession
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {

pkg/collector/logon/logon_test.go

@@ -8,6 +8,6 @@ import (
 )
 
 func BenchmarkCollector(b *testing.B) {
-	// No context name required as collector source is WMI
+	// No context name required as Collector source is WMI
 	testutils.FuncBenchmarkCollector(b, logon.Name, logon.NewWithFlags)
 }

pkg/collector/map.go

@@ -57,70 +57,68 @@ import (
 	"github.com/prometheus-community/windows_exporter/pkg/collector/time"
 	"github.com/prometheus-community/windows_exporter/pkg/collector/vmware"
 	"github.com/prometheus-community/windows_exporter/pkg/collector/vmware_blast"
-	"github.com/prometheus-community/windows_exporter/pkg/types"
-
 	"golang.org/x/exp/maps"
 )
 
-var Map = map[string]types.CollectorBuilderWithFlags{
-	ad.Name:                              ad.NewWithFlags,
-	adcs.Name:                            adcs.NewWithFlags,
-	adfs.Name:                            adfs.NewWithFlags,
-	cache.Name:                           cache.NewWithFlags,
-	container.Name:                       container.NewWithFlags,
-	cpu.Name:                             cpu.NewWithFlags,
-	cpu_info.Name:                        cpu_info.NewWithFlags,
-	cs.Name:                              cs.NewWithFlags,
-	dfsr.Name:                            dfsr.NewWithFlags,
-	dhcp.Name:                            dhcp.NewWithFlags,
-	diskdrive.Name:                       diskdrive.NewWithFlags,
-	dns.Name:                             dns.NewWithFlags,
-	exchange.Name:                        exchange.NewWithFlags,
-	fsrmquota.Name:                       fsrmquota.NewWithFlags,
-	hyperv.Name:                          hyperv.NewWithFlags,
-	iis.Name:                             iis.NewWithFlags,
-	license.Name:                         license.NewWithFlags,
-	logical_disk.Name:                    logical_disk.NewWithFlags,
-	logon.Name:                           logon.NewWithFlags,
-	memory.Name:                          memory.NewWithFlags,
-	mscluster_cluster.Name:               mscluster_cluster.NewWithFlags,
-	mscluster_network.Name:               mscluster_network.NewWithFlags,
-	mscluster_node.Name:                  mscluster_node.NewWithFlags,
-	mscluster_resource.Name:              mscluster_resource.NewWithFlags,
-	mscluster_resourcegroup.Name:         mscluster_resourcegroup.NewWithFlags,
-	msmq.Name:                            msmq.NewWithFlags,
-	mssql.Name:                           mssql.NewWithFlags,
-	net.Name:                             net.NewWithFlags,
-	netframework_clrexceptions.Name:      netframework_clrexceptions.NewWithFlags,
-	netframework_clrinterop.Name:         netframework_clrinterop.NewWithFlags,
-	netframework_clrjit.Name:             netframework_clrjit.NewWithFlags,
-	netframework_clrloading.Name:         netframework_clrloading.NewWithFlags,
-	netframework_clrlocksandthreads.Name: netframework_clrlocksandthreads.NewWithFlags,
-	netframework_clrmemory.Name:          netframework_clrmemory.NewWithFlags,
-	netframework_clrremoting.Name:        netframework_clrremoting.NewWithFlags,
-	netframework_clrsecurity.Name:        netframework_clrsecurity.NewWithFlags,
-	nps.Name:                             nps.NewWithFlags,
-	os.Name:                              os.NewWithFlags,
-	physical_disk.Name:                   physical_disk.NewWithFlags,
-	printer.Name:                         printer.NewWithFlags,
-	process.Name:                         process.NewWithFlags,
-	remote_fx.Name:                       remote_fx.NewWithFlags,
-	scheduled_task.Name:                  scheduled_task.NewWithFlags,
-	service.Name:                         service.NewWithFlags,
-	smb.Name:                             smb.NewWithFlags,
-	smbclient.Name:                       smbclient.NewWithFlags,
-	smtp.Name:                            smtp.NewWithFlags,
-	system.Name:                          system.NewWithFlags,
-	teradici_pcoip.Name:                  teradici_pcoip.NewWithFlags,
-	tcp.Name:                             tcp.NewWithFlags,
-	terminal_services.Name:               terminal_services.NewWithFlags,
-	textfile.Name:                        textfile.NewWithFlags,
-	thermalzone.Name:                     thermalzone.NewWithFlags,
-	time.Name:                            time.NewWithFlags,
-	vmware.Name:                          vmware.NewWithFlags,
-	vmware_blast.Name:                    vmware_blast.NewWithFlags,
+var BuildersWithFlags = map[string]BuilderWithFlags[Collector]{
+	ad.Name:                              NewBuilderWithFlags(ad.NewWithFlags),
+	adcs.Name:                            NewBuilderWithFlags(adcs.NewWithFlags),
+	adfs.Name:                            NewBuilderWithFlags(adfs.NewWithFlags),
+	cache.Name:                           NewBuilderWithFlags(cache.NewWithFlags),
+	container.Name:                       NewBuilderWithFlags(container.NewWithFlags),
+	cpu.Name:                             NewBuilderWithFlags(cpu.NewWithFlags),
+	cpu_info.Name:                        NewBuilderWithFlags(cpu_info.NewWithFlags),
+	cs.Name:                              NewBuilderWithFlags(cs.NewWithFlags),
+	dfsr.Name:                            NewBuilderWithFlags(dfsr.NewWithFlags),
+	dhcp.Name:                            NewBuilderWithFlags(dhcp.NewWithFlags),
+	diskdrive.Name:                       NewBuilderWithFlags(diskdrive.NewWithFlags),
+	dns.Name:                             NewBuilderWithFlags(dns.NewWithFlags),
+	exchange.Name:                        NewBuilderWithFlags(exchange.NewWithFlags),
+	fsrmquota.Name:                       NewBuilderWithFlags(fsrmquota.NewWithFlags),
+	hyperv.Name:                          NewBuilderWithFlags(hyperv.NewWithFlags),
+	iis.Name:                             NewBuilderWithFlags(iis.NewWithFlags),
+	license.Name:                         NewBuilderWithFlags(license.NewWithFlags),
+	logical_disk.Name:                    NewBuilderWithFlags(logical_disk.NewWithFlags),
+	logon.Name:                           NewBuilderWithFlags(logon.NewWithFlags),
+	memory.Name:                          NewBuilderWithFlags(memory.NewWithFlags),
+	mscluster_cluster.Name:               NewBuilderWithFlags(mscluster_cluster.NewWithFlags),
+	mscluster_network.Name:               NewBuilderWithFlags(mscluster_network.NewWithFlags),
+	mscluster_node.Name:                  NewBuilderWithFlags(mscluster_node.NewWithFlags),
+	mscluster_resource.Name:              NewBuilderWithFlags(mscluster_resource.NewWithFlags),
+	mscluster_resourcegroup.Name:         NewBuilderWithFlags(mscluster_resourcegroup.NewWithFlags),
+	msmq.Name:                            NewBuilderWithFlags(msmq.NewWithFlags),
+	mssql.Name:                           NewBuilderWithFlags(mssql.NewWithFlags),
+	net.Name:                             NewBuilderWithFlags(net.NewWithFlags),
+	netframework_clrexceptions.Name:      NewBuilderWithFlags(netframework_clrexceptions.NewWithFlags),
+	netframework_clrinterop.Name:         NewBuilderWithFlags(netframework_clrinterop.NewWithFlags),
+	netframework_clrjit.Name:             NewBuilderWithFlags(netframework_clrjit.NewWithFlags),
+	netframework_clrloading.Name:         NewBuilderWithFlags(netframework_clrloading.NewWithFlags),
+	netframework_clrlocksandthreads.Name: NewBuilderWithFlags(netframework_clrlocksandthreads.NewWithFlags),
+	netframework_clrmemory.Name:          NewBuilderWithFlags(netframework_clrmemory.NewWithFlags),
+	netframework_clrremoting.Name:        NewBuilderWithFlags(netframework_clrremoting.NewWithFlags),
+	netframework_clrsecurity.Name:        NewBuilderWithFlags(netframework_clrsecurity.NewWithFlags),
+	nps.Name:                             NewBuilderWithFlags(nps.NewWithFlags),
+	os.Name:                              NewBuilderWithFlags(os.NewWithFlags),
+	physical_disk.Name:                   NewBuilderWithFlags(physical_disk.NewWithFlags),
+	printer.Name:                         NewBuilderWithFlags(printer.NewWithFlags),
+	process.Name:                         NewBuilderWithFlags(process.NewWithFlags),
+	remote_fx.Name:                       NewBuilderWithFlags(remote_fx.NewWithFlags),
+	scheduled_task.Name:                  NewBuilderWithFlags(scheduled_task.NewWithFlags),
+	service.Name:                         NewBuilderWithFlags(service.NewWithFlags),
+	smb.Name:                             NewBuilderWithFlags(smb.NewWithFlags),
+	smbclient.Name:                       NewBuilderWithFlags(smbclient.NewWithFlags),
+	smtp.Name:                            NewBuilderWithFlags(smtp.NewWithFlags),
+	system.Name:                          NewBuilderWithFlags(system.NewWithFlags),
+	teradici_pcoip.Name:                  NewBuilderWithFlags(teradici_pcoip.NewWithFlags),
+	tcp.Name:                             NewBuilderWithFlags(tcp.NewWithFlags),
+	terminal_services.Name:               NewBuilderWithFlags(terminal_services.NewWithFlags),
+	textfile.Name:                        NewBuilderWithFlags(textfile.NewWithFlags),
+	thermalzone.Name:                     NewBuilderWithFlags(thermalzone.NewWithFlags),
+	time.Name:                            NewBuilderWithFlags(time.NewWithFlags),
+	vmware.Name:                          NewBuilderWithFlags(vmware.NewWithFlags),
+	vmware_blast.Name:                    NewBuilderWithFlags(vmware_blast.NewWithFlags),
 }
 
 func Available() []string {
-	return maps.Keys(Map)
+	return maps.Keys(BuildersWithFlags)
 }

pkg/collector/memory/memory.go

@@ -20,8 +20,8 @@ type Config struct{}
 
 var ConfigDefaults = Config{}
 
-// A collector is a Prometheus collector for perflib Memory metrics
-type collector struct {
+// A Collector is a Prometheus Collector for perflib Memory metrics
+type Collector struct {
 	logger log.Logger
 
 	AvailableBytes                  *prometheus.Desc
@@ -58,29 +58,34 @@ type collector struct {
 	WriteCopiesTotal                *prometheus.Desc
 }
 
-func New(logger log.Logger, _ *Config) types.Collector {
-	c := &collector{}
+func New(logger log.Logger, _ *Config) *Collector {
+	c := &Collector{}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(_ *kingpin.Application) types.Collector {
-	return &collector{}
+func NewWithFlags(_ *kingpin.Application) *Collector {
+	return &Collector{}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{"Memory"}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	c.AvailableBytes = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "available_bytes"),
 		"The amount of physical memory immediately available for allocation to a process or for system use. It is equal to the sum of memory assigned to"+
@@ -290,7 +295,7 @@ func (c *collector) Build() error {
 
 // Collect sends the metric values for each metric
 // to the provided prometheus Metric channel.
-func (c *collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	if err := c.collect(ctx, ch); err != nil {
 		_ = level.Error(c.logger).Log("msg", "failed collecting memory metrics", "err", err)
 		return err
@@ -335,7 +340,7 @@ type memory struct {
 	WriteCopiesPersec               float64 `perflib:"Write Copies/sec"`
 }
 
-func (c *collector) collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	var dst []memory
 	if err := perflib.UnmarshalObject(ctx.PerfObjects["Memory"], &dst, c.logger); err != nil {
 		return err

pkg/collector/mscluster_cluster/mscluster_cluster.go

@@ -1,11 +1,10 @@
 package mscluster_cluster
 
 import (
-	"github.com/prometheus-community/windows_exporter/pkg/types"
-	"github.com/prometheus-community/windows_exporter/pkg/wmi"
-
 	"github.com/alecthomas/kingpin/v2"
 	"github.com/go-kit/log"
+	"github.com/prometheus-community/windows_exporter/pkg/types"
+	"github.com/prometheus-community/windows_exporter/pkg/wmi"
 	"github.com/prometheus/client_golang/prometheus"
 )
 
@@ -15,8 +14,8 @@ type Config struct{}
 
 var ConfigDefaults = Config{}
 
-// A collector is a Prometheus collector for WMI MSCluster_Cluster metrics
-type collector struct {
+// A Collector is a Prometheus Collector for WMI MSCluster_Cluster metrics
+type Collector struct {
 	logger log.Logger
 
 	AddEvictDelay                           *prometheus.Desc
@@ -98,29 +97,34 @@ type collector struct {
 	WitnessRestartInterval                  *prometheus.Desc
 }
 
-func New(logger log.Logger, _ *Config) types.Collector {
-	c := &collector{}
+func New(logger log.Logger, _ *Config) *Collector {
+	c := &Collector{}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(_ *kingpin.Application) types.Collector {
-	return &collector{}
+func NewWithFlags(_ *kingpin.Application) *Collector {
+	return &Collector{}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{"Memory"}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	c.AddEvictDelay = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "add_evict_delay"),
 		"Provides access to the cluster's AddEvictDelay property, which is the number a seconds that a new node is delayed after an eviction of another node.",
@@ -672,7 +676,7 @@ type MSCluster_Cluster struct {
 
 // Collect sends the metric values for each metric
 // to the provided prometheus Metric channel.
-func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	var dst []MSCluster_Cluster
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.QueryNamespace(q, &dst, "root/MSCluster"); err != nil {
@@ -680,7 +684,6 @@ func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric)
 	}
 
 	for _, v := range dst {
-
 		ch <- prometheus.MustNewConstMetric(
 			c.AddEvictDelay,
 			prometheus.GaugeValue,
@@ -1219,7 +1222,6 @@ func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric)
 			float64(v.WitnessRestartInterval),
 			v.Name,
 		)
-
 	}
 
 	return nil

pkg/collector/mscluster_network/mscluster_network.go

@@ -1,11 +1,10 @@
 package mscluster_network
 
 import (
-	"github.com/prometheus-community/windows_exporter/pkg/types"
-	"github.com/prometheus-community/windows_exporter/pkg/wmi"
-
 	"github.com/alecthomas/kingpin/v2"
 	"github.com/go-kit/log"
+	"github.com/prometheus-community/windows_exporter/pkg/types"
+	"github.com/prometheus-community/windows_exporter/pkg/wmi"
 	"github.com/prometheus/client_golang/prometheus"
 )
 
@@ -15,8 +14,8 @@ type Config struct{}
 
 var ConfigDefaults = Config{}
 
-// A collector is a Prometheus collector for WMI MSCluster_Network metrics
-type collector struct {
+// A Collector is a Prometheus Collector for WMI MSCluster_Network metrics
+type Collector struct {
 	logger log.Logger
 
 	Characteristics *prometheus.Desc
@@ -26,29 +25,34 @@ type collector struct {
 	State           *prometheus.Desc
 }
 
-func New(logger log.Logger, _ *Config) types.Collector {
-	c := &collector{}
+func New(logger log.Logger, _ *Config) *Collector {
+	c := &Collector{}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(_ *kingpin.Application) types.Collector {
-	return &collector{}
+func NewWithFlags(_ *kingpin.Application) *Collector {
+	return &Collector{}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{"Memory"}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	c.Characteristics = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "characteristics"),
 		"Provides the characteristics of the network.",
@@ -96,7 +100,7 @@ type MSCluster_Network struct {
 
 // Collect sends the metric values for each metric
 // to the provided prometheus Metric channel.
-func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	var dst []MSCluster_Network
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.QueryNamespace(q, &dst, "root/MSCluster"); err != nil {

pkg/collector/mscluster_node/mscluster_node.go

@@ -1,11 +1,10 @@
 package mscluster_node
 
 import (
-	"github.com/prometheus-community/windows_exporter/pkg/types"
-	"github.com/prometheus-community/windows_exporter/pkg/wmi"
-
 	"github.com/alecthomas/kingpin/v2"
 	"github.com/go-kit/log"
+	"github.com/prometheus-community/windows_exporter/pkg/types"
+	"github.com/prometheus-community/windows_exporter/pkg/wmi"
 	"github.com/prometheus/client_golang/prometheus"
 )
 
@@ -18,8 +17,8 @@ var ConfigDefaults = Config{}
 // Variable used by mscluster_resource and mscluster_resourcegroup
 var NodeName []string
 
-// A collector is a Prometheus collector for WMI MSCluster_Node metrics
-type collector struct {
+// A Collector is a Prometheus Collector for WMI MSCluster_Node metrics
+type Collector struct {
 	logger log.Logger
 
 	BuildNumber           *prometheus.Desc
@@ -38,29 +37,34 @@ type collector struct {
 	StatusInformation     *prometheus.Desc
 }
 
-func New(logger log.Logger, _ *Config) types.Collector {
-	c := &collector{}
+func New(logger log.Logger, _ *Config) *Collector {
+	c := &Collector{}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(_ *kingpin.Application) types.Collector {
-	return &collector{}
+func NewWithFlags(_ *kingpin.Application) *Collector {
+	return &Collector{}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{"Memory"}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	c.BuildNumber = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "build_number"),
 		"Provides access to the node's BuildNumber property.",
@@ -171,7 +175,7 @@ type MSCluster_Node struct {
 
 // Collect sends the metric values for each metric
 // to the provided prometheus Metric channel.
-func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	var dst []MSCluster_Node
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.QueryNamespace(q, &dst, "root/MSCluster"); err != nil {
@@ -181,7 +185,6 @@ func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric)
 	NodeName = []string{}
 
 	for _, v := range dst {
-
 		ch <- prometheus.MustNewConstMetric(
 			c.BuildNumber,
 			prometheus.GaugeValue,

pkg/collector/mscluster_resource/mscluster_resource.go

@@ -1,12 +1,11 @@
 package mscluster_resource
 
 import (
+	"github.com/alecthomas/kingpin/v2"
+	"github.com/go-kit/log"
 	"github.com/prometheus-community/windows_exporter/pkg/collector/mscluster_node"
 	"github.com/prometheus-community/windows_exporter/pkg/types"
 	"github.com/prometheus-community/windows_exporter/pkg/wmi"
-
-	"github.com/alecthomas/kingpin/v2"
-	"github.com/go-kit/log"
 	"github.com/prometheus/client_golang/prometheus"
 )
 
@@ -16,8 +15,8 @@ type Config struct{}
 
 var ConfigDefaults = Config{}
 
-// A collector is a Prometheus collector for WMI MSCluster_Resource metrics
-type collector struct {
+// A Collector is a Prometheus Collector for WMI MSCluster_Resource metrics
+type Collector struct {
 	logger log.Logger
 
 	Characteristics        *prometheus.Desc
@@ -39,29 +38,34 @@ type collector struct {
 	Subclass               *prometheus.Desc
 }
 
-func New(logger log.Logger, _ *Config) types.Collector {
-	c := &collector{}
+func New(logger log.Logger, _ *Config) *Collector {
+	c := &Collector{}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(_ *kingpin.Application) types.Collector {
-	return &collector{}
+func NewWithFlags(_ *kingpin.Application) *Collector {
+	return &Collector{}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{"Memory"}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	c.Characteristics = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "characteristics"),
 		"Provides the characteristics of the object.",
@@ -201,7 +205,7 @@ type MSCluster_Resource struct {
 
 // Collect sends the metric values for each metric
 // to the provided prometheus Metric channel.
-func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	var dst []MSCluster_Resource
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.QueryNamespace(q, &dst, "root/MSCluster"); err != nil {
@@ -209,7 +213,6 @@ func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric)
 	}
 
 	for _, v := range dst {
-
 		ch <- prometheus.MustNewConstMetric(
 			c.Characteristics,
 			prometheus.GaugeValue,

pkg/collector/mscluster_resourcegroup/mscluster_resourcegroup.go

@@ -1,12 +1,11 @@
 package mscluster_resourcegroup
 
 import (
+	"github.com/alecthomas/kingpin/v2"
+	"github.com/go-kit/log"
 	"github.com/prometheus-community/windows_exporter/pkg/collector/mscluster_node"
 	"github.com/prometheus-community/windows_exporter/pkg/types"
 	"github.com/prometheus-community/windows_exporter/pkg/wmi"
-
-	"github.com/alecthomas/kingpin/v2"
-	"github.com/go-kit/log"
 	"github.com/prometheus/client_golang/prometheus"
 )
 
@@ -16,8 +15,8 @@ type Config struct{}
 
 var ConfigDefaults = Config{}
 
-// A collector is a Prometheus collector for WMI MSCluster_ResourceGroup metrics
-type collector struct {
+// A Collector is a Prometheus Collector for WMI MSCluster_ResourceGroup metrics
+type Collector struct {
 	logger log.Logger
 
 	AutoFailbackType    *prometheus.Desc
@@ -38,29 +37,34 @@ type collector struct {
 	State               *prometheus.Desc
 }
 
-func New(logger log.Logger, _ *Config) types.Collector {
-	c := &collector{}
+func New(logger log.Logger, _ *Config) *Collector {
+	c := &Collector{}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(_ *kingpin.Application) types.Collector {
-	return &collector{}
+func NewWithFlags(_ *kingpin.Application) *Collector {
+	return &Collector{}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{"Memory"}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	c.AutoFailbackType = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "auto_failback_type"),
 		"Provides access to the group's AutoFailbackType property.",
@@ -177,7 +181,7 @@ type MSCluster_ResourceGroup struct {
 
 // Collect sends the metric values for each metric
 // to the provided prometheus Metric channel.
-func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	var dst []MSCluster_ResourceGroup
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.QueryNamespace(q, &dst, "root/MSCluster"); err != nil {
@@ -185,7 +189,6 @@ func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric)
 	}
 
 	for _, v := range dst {
-
 		ch <- prometheus.MustNewConstMetric(
 			c.AutoFailbackType,
 			prometheus.GaugeValue,
@@ -291,7 +294,6 @@ func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric)
 			float64(v.State),
 			v.Name,
 		)
-
 	}
 
 	return nil

pkg/collector/msmq/msmq.go

@@ -14,10 +14,7 @@ import (
 	"github.com/prometheus/client_golang/prometheus"
 )
 
-const (
-	Name                = "msmq"
-	FlagMsmqWhereClause = "collector.msmq.msmq-where"
-)
+const Name = "msmq"
 
 type Config struct {
 	QueryWhereClause string `yaml:"query_where_clause"`
@@ -27,8 +24,8 @@ var ConfigDefaults = Config{
 	QueryWhereClause: "",
 }
 
-// A collector is a Prometheus collector for WMI Win32_PerfRawData_MSMQ_MSMQQueue metrics
-type collector struct {
+// A Collector is a Prometheus Collector for WMI Win32_PerfRawData_MSMQ_MSMQQueue metrics
+type Collector struct {
 	logger log.Logger
 
 	queryWhereClause *string
@@ -39,39 +36,44 @@ type collector struct {
 	MessagesinQueue        *prometheus.Desc
 }
 
-func New(logger log.Logger, config *Config) types.Collector {
+func New(logger log.Logger, config *Config) *Collector {
 	if config == nil {
 		config = &ConfigDefaults
 	}
 
-	c := &collector{
+	c := &Collector{
 		queryWhereClause: &config.QueryWhereClause,
 	}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(app *kingpin.Application) types.Collector {
-	return &collector{
+func NewWithFlags(app *kingpin.Application) *Collector {
+	return &Collector{
 		queryWhereClause: app.
-			Flag(FlagMsmqWhereClause, "WQL 'where' clause to use in WMI metrics query. Limits the response to the msmqs you specify and reduces the size of the response.").
+			Flag("collector.msmq.msmq-where", "WQL 'where' clause to use in WMI metrics query. Limits the response to the msmqs you specify and reduces the size of the response.").
 			Default(ConfigDefaults.QueryWhereClause).String(),
 	}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	if utils.IsEmpty(c.queryWhereClause) {
 		_ = level.Warn(c.logger).Log("msg", "No where-clause specified for msmq collector. This will generate a very large number of metrics!")
 	}
@@ -105,7 +107,7 @@ func (c *collector) Build() error {
 
 // Collect sends the metric values for each metric
 // to the provided prometheus Metric channel.
-func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	if err := c.collect(ch); err != nil {
 		_ = level.Error(c.logger).Log("msg", "failed collecting msmq metrics", "err", err)
 		return err
@@ -122,7 +124,7 @@ type Win32_PerfRawData_MSMQ_MSMQQueue struct {
 	MessagesinQueue        uint64
 }
 
-func (c *collector) collect(ch chan<- prometheus.Metric) error {
+func (c *Collector) collect(ch chan<- prometheus.Metric) error {
 	var dst []Win32_PerfRawData_MSMQ_MSMQQueue
 	q := wmi.QueryAllWhere(&dst, *c.queryWhereClause, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {

pkg/collector/msmq/msmq_test.go

@@ -8,6 +8,6 @@ import (
 )
 
 func BenchmarkCollector(b *testing.B) {
-	// No context name required as collector source is WMI
+	// No context name required as Collector source is WMI
 	testutils.FuncBenchmarkCollector(b, msmq.Name, msmq.NewWithFlags)
 }

pkg/collector/mssql/mssql.go

@@ -20,11 +20,7 @@ import (
 	"golang.org/x/sys/windows/registry"
 )
 
-const (
-	Name                       = "mssql"
-	FlagMssqlEnabledCollectors = "collectors.mssql.classes-enabled"
-	FlagMssqlPrintCollectors   = "collectors.mssql.class-print"
-)
+const Name = "mssql"
 
 type Config struct {
 	EnabledCollectors string `yaml:"collectors_enabled"`
@@ -75,7 +71,7 @@ func getMSSQLInstances(logger log.Logger) mssqlInstancesType {
 
 type mssqlCollectorsMap map[string]mssqlCollectorFunc
 
-func (c *collector) getMSSQLCollectors() mssqlCollectorsMap {
+func (c *Collector) getMSSQLCollectors() mssqlCollectorsMap {
 	mssqlCollectors := make(mssqlCollectorsMap)
 	mssqlCollectors["accessmethods"] = c.collectAccessMethods
 	mssqlCollectors["availreplica"] = c.collectAvailabilityReplica
@@ -94,7 +90,7 @@ func (c *collector) getMSSQLCollectors() mssqlCollectorsMap {
 }
 
 // mssqlGetPerfObjectName - Returns the name of the Windows Performance
-// Counter object for the given SQL instance and collector.
+// Counter object for the given SQL instance and Collector.
 func mssqlGetPerfObjectName(sqlInstance string, collector string) string {
 	prefix := "SQLServer:"
 	if sqlInstance != "MSSQLSERVER" {
@@ -130,8 +126,8 @@ func mssqlGetPerfObjectName(sqlInstance string, collector string) string {
 	return prefix + suffix
 }
 
-// A collector is a Prometheus collector for various WMI Win32_PerfRawData_MSSQLSERVER_* metrics
-type collector struct {
+// A Collector is a Prometheus Collector for various WMI Win32_PerfRawData_MSSQLSERVER_* metrics
+type Collector struct {
 	logger log.Logger
 
 	mssqlEnabledCollectors *string
@@ -407,44 +403,45 @@ type collector struct {
 	mssqlChildCollectorFailure int
 }
 
-func New(logger log.Logger, config *Config) types.Collector {
+func New(logger log.Logger, config *Config) *Collector {
 	if config == nil {
 		config = &ConfigDefaults
 	}
 
 	printCollectors := false
 
-	c := &collector{
+	c := &Collector{
 		mssqlEnabledCollectors: &config.EnabledCollectors,
 		mssqlPrintCollectors:   &printCollectors,
 	}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(app *kingpin.Application) types.Collector {
-	return &collector{
+func NewWithFlags(app *kingpin.Application) *Collector {
+	return &Collector{
 		mssqlEnabledCollectors: app.Flag(
-			FlagMssqlEnabledCollectors,
+			"collectors.mssql.classes-enabled",
 			"Comma-separated list of mssql WMI classes to use.").
 			Default(ConfigDefaults.EnabledCollectors).String(),
 
 		mssqlPrintCollectors: app.Flag(
-			FlagMssqlPrintCollectors,
+			"collectors.mssql.class-print",
 			"If true, print available mssql WMI classes and exit.  Only displays if the mssql collector is enabled.",
 		).Bool(),
 	}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	enabled := utils.ExpandEnabledChildCollectors(*c.mssqlEnabledCollectors)
 	c.mssqlInstances = getMSSQLInstances(c.logger)
 	perfCounters := make([]string, 0, len(c.mssqlInstances)*len(enabled))
@@ -457,7 +454,11 @@ func (c *collector) GetPerfCounter() ([]string, error) {
 	return perfCounters, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	// meta
 	c.mssqlScrapeDurationDesc = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "collector_duration_seconds"),
@@ -1922,10 +1923,11 @@ func (c *collector) Build() error {
 	c.mssqlCollectors = c.getMSSQLCollectors()
 
 	if *c.mssqlPrintCollectors {
-		fmt.Printf("Available SQLServer Classes:\n")
+		fmt.Printf("Available SQLServer Classes:\n") //nolint:forbidigo
 		for name := range c.mssqlCollectors {
-			fmt.Printf(" - %s\n", name)
+			fmt.Printf(" - %s\n", name) //nolint:forbidigo
 		}
+
 		os.Exit(0)
 	}
 
@@ -1934,7 +1936,7 @@ func (c *collector) Build() error {
 
 type mssqlCollectorFunc func(ctx *types.ScrapeContext, ch chan<- prometheus.Metric, sqlInstance string) error
 
-func (c *collector) execute(ctx *types.ScrapeContext, name string, fn mssqlCollectorFunc, ch chan<- prometheus.Metric, sqlInstance string, wg *sync.WaitGroup) {
+func (c *Collector) execute(ctx *types.ScrapeContext, name string, fn mssqlCollectorFunc, ch chan<- prometheus.Metric, sqlInstance string, wg *sync.WaitGroup) {
 	// Reset failure counter on each scrape
 	c.mssqlChildCollectorFailure = 0
 	defer wg.Done()
@@ -1968,7 +1970,7 @@ func (c *collector) execute(ctx *types.ScrapeContext, name string, fn mssqlColle
 
 // Collect sends the metric values for each metric
 // to the provided prometheus Metric channel.
-func (c *collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	wg := sync.WaitGroup{}
 
 	enabled := utils.ExpandEnabledChildCollectors(*c.mssqlEnabledCollectors)
@@ -2038,7 +2040,7 @@ type mssqlAccessMethods struct {
 	WorktablesFromCacheRatio_Base float64 `perflib:"Worktables From Cache Base_Base"`
 }
 
-func (c *collector) collectAccessMethods(ctx *types.ScrapeContext, ch chan<- prometheus.Metric, sqlInstance string) error {
+func (c *Collector) collectAccessMethods(ctx *types.ScrapeContext, ch chan<- prometheus.Metric, sqlInstance string) error {
 	var dst []mssqlAccessMethods
 	_ = level.Debug(c.logger).Log("msg", fmt.Sprintf("mssql_accessmethods collector iterating sql instance %s.", sqlInstance))
 
@@ -2373,7 +2375,7 @@ type mssqlAvailabilityReplica struct {
 	SendstoTransportPersec         float64 `perflib:"Sends to Transport/sec"`
 }
 
-func (c *collector) collectAvailabilityReplica(ctx *types.ScrapeContext, ch chan<- prometheus.Metric, sqlInstance string) error {
+func (c *Collector) collectAvailabilityReplica(ctx *types.ScrapeContext, ch chan<- prometheus.Metric, sqlInstance string) error {
 	var dst []mssqlAvailabilityReplica
 	_ = level.Debug(c.logger).Log("msg", fmt.Sprintf("mssql_availreplica collector iterating sql instance %s.", sqlInstance))
 
@@ -2481,7 +2483,7 @@ type mssqlBufferManager struct {
 	Targetpages                   float64 `perflib:"Target pages"`
 }
 
-func (c *collector) collectBufferManager(ctx *types.ScrapeContext, ch chan<- prometheus.Metric, sqlInstance string) error {
+func (c *Collector) collectBufferManager(ctx *types.ScrapeContext, ch chan<- prometheus.Metric, sqlInstance string) error {
 	var dst []mssqlBufferManager
 	_ = level.Debug(c.logger).Log("msg", fmt.Sprintf("mssql_bufman collector iterating sql instance %s.", sqlInstance))
 
@@ -2685,7 +2687,7 @@ type mssqlDatabaseReplica struct {
 	TransactionDelay                float64 `perflib:"Transaction Delay"`
 }
 
-func (c *collector) collectDatabaseReplica(ctx *types.ScrapeContext, ch chan<- prometheus.Metric, sqlInstance string) error {
+func (c *Collector) collectDatabaseReplica(ctx *types.ScrapeContext, ch chan<- prometheus.Metric, sqlInstance string) error {
 	var dst []mssqlDatabaseReplica
 	_ = level.Debug(c.logger).Log("msg", fmt.Sprintf("mssql_dbreplica collector iterating sql instance %s.", sqlInstance))
 
@@ -2924,7 +2926,7 @@ type mssqlDatabases struct {
 	XTPMemoryUsedKB                  float64 `perflib:"XTP Memory Used (KB)"`
 }
 
-func (c *collector) collectDatabases(ctx *types.ScrapeContext, ch chan<- prometheus.Metric, sqlInstance string) error {
+func (c *Collector) collectDatabases(ctx *types.ScrapeContext, ch chan<- prometheus.Metric, sqlInstance string) error {
 	var dst []mssqlDatabases
 	_ = level.Debug(c.logger).Log("msg", fmt.Sprintf("mssql_databases collector iterating sql instance %s.", sqlInstance))
 
@@ -3306,7 +3308,7 @@ type mssqlGeneralStatistics struct {
 	UserConnections               float64 `perflib:"User Connections"`
 }
 
-func (c *collector) collectGeneralStatistics(ctx *types.ScrapeContext, ch chan<- prometheus.Metric, sqlInstance string) error {
+func (c *Collector) collectGeneralStatistics(ctx *types.ScrapeContext, ch chan<- prometheus.Metric, sqlInstance string) error {
 	var dst []mssqlGeneralStatistics
 	_ = level.Debug(c.logger).Log("msg", fmt.Sprintf("mssql_genstats collector iterating sql instance %s.", sqlInstance))
 
@@ -3501,7 +3503,7 @@ type mssqlLocks struct {
 	NumberofDeadlocksPersec    float64 `perflib:"Number of Deadlocks/sec"`
 }
 
-func (c *collector) collectLocks(ctx *types.ScrapeContext, ch chan<- prometheus.Metric, sqlInstance string) error {
+func (c *Collector) collectLocks(ctx *types.ScrapeContext, ch chan<- prometheus.Metric, sqlInstance string) error {
 	var dst []mssqlLocks
 	_ = level.Debug(c.logger).Log("msg", fmt.Sprintf("mssql_locks collector iterating sql instance %s.", sqlInstance))
 
@@ -3599,7 +3601,7 @@ type mssqlMemoryManager struct {
 	TotalServerMemoryKB      float64 `perflib:"Total Server Memory (KB)"`
 }
 
-func (c *collector) collectMemoryManager(ctx *types.ScrapeContext, ch chan<- prometheus.Metric, sqlInstance string) error {
+func (c *Collector) collectMemoryManager(ctx *types.ScrapeContext, ch chan<- prometheus.Metric, sqlInstance string) error {
 	var dst []mssqlMemoryManager
 	_ = level.Debug(c.logger).Log("msg", fmt.Sprintf("mssql_memmgr collector iterating sql instance %s.", sqlInstance))
 
@@ -3768,7 +3770,7 @@ type mssqlSQLStatistics struct {
 	UnsafeAutoParamsPersec        float64 `perflib:"Unsafe Auto-Params/sec"`
 }
 
-func (c *collector) collectSQLStats(ctx *types.ScrapeContext, ch chan<- prometheus.Metric, sqlInstance string) error {
+func (c *Collector) collectSQLStats(ctx *types.ScrapeContext, ch chan<- prometheus.Metric, sqlInstance string) error {
 	var dst []mssqlSQLStatistics
 	_ = level.Debug(c.logger).Log("msg", fmt.Sprintf("mssql_sqlstats collector iterating sql instance %s.", sqlInstance))
 
@@ -3876,7 +3878,7 @@ type mssqlWaitStatistics struct {
 	WaitStatsTransactionOwnershipWaits     float64 `perflib:"Transaction ownership waits"`
 }
 
-func (c *collector) collectWaitStats(ctx *types.ScrapeContext, ch chan<- prometheus.Metric, sqlInstance string) error {
+func (c *Collector) collectWaitStats(ctx *types.ScrapeContext, ch chan<- prometheus.Metric, sqlInstance string) error {
 	var dst []mssqlWaitStatistics
 	_ = level.Debug(c.logger).Log("msg", fmt.Sprintf("mssql_waitstats collector iterating sql instance %s.", sqlInstance))
 
@@ -3982,7 +3984,7 @@ type mssqlSQLErrors struct {
 
 // Win32_PerfRawData_MSSQLSERVER_SQLServerErrors docs:
 // - https://docs.microsoft.com/en-us/sql/relational-databases/performance-monitor/sql-server-sql-errors-object
-func (c *collector) collectSQLErrors(ctx *types.ScrapeContext, ch chan<- prometheus.Metric, sqlInstance string) error {
+func (c *Collector) collectSQLErrors(ctx *types.ScrapeContext, ch chan<- prometheus.Metric, sqlInstance string) error {
 	var dst []mssqlSQLErrors
 	_ = level.Debug(c.logger).Log("msg", fmt.Sprintf("mssql_sqlerrors collector iterating sql instance %s.", sqlInstance))
 
@@ -4025,7 +4027,7 @@ type mssqlTransactions struct {
 
 // Win32_PerfRawData_MSSQLSERVER_Transactions docs:
 // - https://docs.microsoft.com/en-us/sql/relational-databases/performance-monitor/sql-server-transactions-object
-func (c *collector) collectTransactions(ctx *types.ScrapeContext, ch chan<- prometheus.Metric, sqlInstance string) error {
+func (c *Collector) collectTransactions(ctx *types.ScrapeContext, ch chan<- prometheus.Metric, sqlInstance string) error {
 	var dst []mssqlTransactions
 	_ = level.Debug(c.logger).Log("msg", fmt.Sprintf("mssql_transactions collector iterating sql instance %s.", sqlInstance))
 

pkg/collector/net/net.go

@@ -14,12 +14,7 @@ import (
 	"github.com/prometheus/client_golang/prometheus"
 )
 
-const (
-	Name = "net"
-
-	FlagNicExclude = "collector.net.nic-exclude"
-	FlagNicInclude = "collector.net.nic-include"
-)
+const Name = "net"
 
 type Config struct {
 	NicInclude string `yaml:"nic_include"`
@@ -33,8 +28,8 @@ var ConfigDefaults = Config{
 
 var nicNameToUnderscore = regexp.MustCompile("[^a-zA-Z0-9]")
 
-// A collector is a Prometheus collector for Perflib Network Interface metrics
-type collector struct {
+// A Collector is a Prometheus Collector for Perflib Network Interface metrics
+type Collector struct {
 	logger log.Logger
 
 	nicInclude *string
@@ -58,28 +53,29 @@ type collector struct {
 	nicExcludePattern *regexp.Regexp
 }
 
-func New(logger log.Logger, config *Config) types.Collector {
+func New(logger log.Logger, config *Config) *Collector {
 	if config == nil {
 		config = &ConfigDefaults
 	}
 
-	c := &collector{
+	c := &Collector{
 		nicExclude: &config.NicExclude,
 		nicInclude: &config.NicInclude,
 	}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(app *kingpin.Application) types.Collector {
-	c := &collector{
+func NewWithFlags(app *kingpin.Application) *Collector {
+	c := &Collector{
 		nicInclude: app.Flag(
-			FlagNicInclude,
+			"collector.net.nic-include",
 			"Regexp of NIC:s to include. NIC name must both match include and not match exclude to be included.",
 		).Default(ConfigDefaults.NicInclude).String(),
 
 		nicExclude: app.Flag(
-			FlagNicExclude,
+			"collector.net.nic-exclude",
 			"Regexp of NIC:s to exclude. NIC name must both match include and not match exclude to be included.",
 		).Default(ConfigDefaults.NicExclude).String(),
 	}
@@ -87,19 +83,23 @@ func NewWithFlags(app *kingpin.Application) types.Collector {
 	return c
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{"Network Interface"}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	c.BytesReceivedTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "bytes_received_total"),
 		"(Network.BytesReceivedPerSec)",
@@ -195,7 +195,7 @@ func (c *collector) Build() error {
 
 // Collect sends the metric values for each metric
 // to the provided prometheus Metric channel.
-func (c *collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	if err := c.collect(ctx, ch); err != nil {
 		_ = level.Error(c.logger).Log("msg", "failed collecting net metrics", "err", err)
 		return err
@@ -228,7 +228,7 @@ type networkInterface struct {
 	CurrentBandwidth         float64 `perflib:"Current Bandwidth"`
 }
 
-func (c *collector) collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	var dst []networkInterface
 
 	if err := perflib.UnmarshalObject(ctx.PerfObjects["Network Interface"], &dst, c.logger); err != nil {

pkg/collector/net/net_bench_test.go

@@ -11,9 +11,9 @@ import (
 )
 
 func BenchmarkCollector(b *testing.B) {
-	// Include is not set in testing context (kingpin flags not parsed), causing the collector to skip all interfaces.
+	// PrinterInclude is not set in testing context (kingpin flags not parsed), causing the collector to skip all interfaces.
 	localNicInclude := ".+"
 
-	kingpin.CommandLine.GetArg(net.FlagNicInclude).StringVar(&localNicInclude)
+	kingpin.CommandLine.GetArg("collector.net.nic-include").StringVar(&localNicInclude)
 	testutils.FuncBenchmarkCollector(b, net.Name, net.NewWithFlags)
 }

pkg/collector/netframework_clrexceptions/netframework_clrexceptions.go

@@ -3,12 +3,11 @@
 package netframework_clrexceptions
 
 import (
-	"github.com/prometheus-community/windows_exporter/pkg/types"
-	"github.com/prometheus-community/windows_exporter/pkg/wmi"
-
 	"github.com/alecthomas/kingpin/v2"
 	"github.com/go-kit/log"
 	"github.com/go-kit/log/level"
+	"github.com/prometheus-community/windows_exporter/pkg/types"
+	"github.com/prometheus-community/windows_exporter/pkg/wmi"
 	"github.com/prometheus/client_golang/prometheus"
 )
 
@@ -18,52 +17,57 @@ type Config struct{}
 
 var ConfigDefaults = Config{}
 
-// A collector is a Prometheus collector for WMI Win32_PerfRawData_NETFramework_NETCLRExceptions metrics
-type collector struct {
+// A Collector is a Prometheus Collector for WMI Win32_PerfRawData_NETFramework_NETCLRExceptions metrics
+type Collector struct {
 	logger log.Logger
 
-	NumberofExcepsThrown *prometheus.Desc
-	NumberofFilters      *prometheus.Desc
-	NumberofFinallys     *prometheus.Desc
+	NumberOfExceptionsThrown *prometheus.Desc
+	NumberOfFilters          *prometheus.Desc
+	NumberOfFinally          *prometheus.Desc
 	ThrowToCatchDepth        *prometheus.Desc
 }
 
-func New(logger log.Logger, _ *Config) types.Collector {
-	c := &collector{}
+func New(logger log.Logger, _ *Config) *Collector {
+	c := &Collector{}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(_ *kingpin.Application) types.Collector {
-	return &collector{}
+func NewWithFlags(_ *kingpin.Application) *Collector {
+	return &Collector{}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{}, nil
 }
 
-func (c *collector) Build() error {
-	c.NumberofExcepsThrown = prometheus.NewDesc(
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
+	c.NumberOfExceptionsThrown = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "exceptions_thrown_total"),
 		"Displays the total number of exceptions thrown since the application started. This includes both .NET exceptions and unmanaged exceptions that are converted into .NET exceptions.",
 		[]string{"process"},
 		nil,
 	)
-	c.NumberofFilters = prometheus.NewDesc(
+	c.NumberOfFilters = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "exceptions_filters_total"),
 		"Displays the total number of .NET exception filters executed. An exception filter evaluates regardless of whether an exception is handled.",
 		[]string{"process"},
 		nil,
 	)
-	c.NumberofFinallys = prometheus.NewDesc(
+	c.NumberOfFinally = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "exceptions_finallys_total"),
 		"Displays the total number of finally blocks executed. Only the finally blocks executed for an exception are counted; finally blocks on normal code paths are not counted by this counter.",
 		[]string{"process"},
@@ -80,7 +84,7 @@ func (c *collector) Build() error {
 
 // Collect sends the metric values for each metric
 // to the provided prometheus Metric channel.
-func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	if err := c.collect(ch); err != nil {
 		_ = level.Error(c.logger).Log("msg", "failed collecting win32_perfrawdata_netframework_netclrexceptions metrics", "err", err)
 		return err
@@ -98,7 +102,7 @@ type Win32_PerfRawData_NETFramework_NETCLRExceptions struct {
 	ThrowToCatchDepthPersec    uint32
 }
 
-func (c *collector) collect(ch chan<- prometheus.Metric) error {
+func (c *Collector) collect(ch chan<- prometheus.Metric) error {
 	var dst []Win32_PerfRawData_NETFramework_NETCLRExceptions
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {
@@ -106,27 +110,26 @@ func (c *collector) collect(ch chan<- prometheus.Metric) error {
 	}
 
 	for _, process := range dst {
-
 		if process.Name == "_Global_" {
 			continue
 		}
 
 		ch <- prometheus.MustNewConstMetric(
-			c.NumberofExcepsThrown,
+			c.NumberOfExceptionsThrown,
 			prometheus.CounterValue,
 			float64(process.NumberofExcepsThrown),
 			process.Name,
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.NumberofFilters,
+			c.NumberOfFilters,
 			prometheus.CounterValue,
 			float64(process.NumberofFiltersPersec),
 			process.Name,
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.NumberofFinallys,
+			c.NumberOfFinally,
 			prometheus.CounterValue,
 			float64(process.NumberofFinallysPersec),
 			process.Name,

pkg/collector/netframework_clrexceptions/netframework_clrexceptions_test.go

@@ -8,6 +8,6 @@ import (
 )
 
 func BenchmarkCollector(b *testing.B) {
-	// No context name required as collector source is WMI
+	// No context name required as Collector source is WMI
 	testutils.FuncBenchmarkCollector(b, netframework_clrexceptions.Name, netframework_clrexceptions.NewWithFlags)
 }

pkg/collector/netframework_clrinterop/netframework_clrinterop.go

@@ -3,12 +3,11 @@
 package netframework_clrinterop
 
 import (
-	"github.com/prometheus-community/windows_exporter/pkg/types"
-	"github.com/prometheus-community/windows_exporter/pkg/wmi"
-
 	"github.com/alecthomas/kingpin/v2"
 	"github.com/go-kit/log"
 	"github.com/go-kit/log/level"
+	"github.com/prometheus-community/windows_exporter/pkg/types"
+	"github.com/prometheus-community/windows_exporter/pkg/wmi"
 	"github.com/prometheus/client_golang/prometheus"
 )
 
@@ -18,8 +17,8 @@ type Config struct{}
 
 var ConfigDefaults = Config{}
 
-// A collector is a Prometheus collector for WMI Win32_PerfRawData_NETFramework_NETCLRInterop metrics
-type collector struct {
+// A Collector is a Prometheus Collector for WMI Win32_PerfRawData_NETFramework_NETCLRInterop metrics
+type Collector struct {
 	logger log.Logger
 
 	NumberofCCWs        *prometheus.Desc
@@ -27,29 +26,34 @@ type collector struct {
 	NumberofStubs       *prometheus.Desc
 }
 
-func New(logger log.Logger, _ *Config) types.Collector {
-	c := &collector{}
+func New(logger log.Logger, _ *Config) *Collector {
+	c := &Collector{}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(_ *kingpin.Application) types.Collector {
-	return &collector{}
+func NewWithFlags(_ *kingpin.Application) *Collector {
+	return &Collector{}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	c.NumberofCCWs = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "com_callable_wrappers_total"),
 		"Displays the current number of COM callable wrappers (CCWs). A CCW is a proxy for a managed object being referenced from an unmanaged COM client.",
@@ -73,7 +77,7 @@ func (c *collector) Build() error {
 
 // Collect sends the metric values for each metric
 // to the provided prometheus Metric channel.
-func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	if err := c.collect(ch); err != nil {
 		_ = level.Error(c.logger).Log("msg", "failed collecting win32_perfrawdata_netframework_netclrinterop metrics", "err", err)
 		return err
@@ -91,7 +95,7 @@ type Win32_PerfRawData_NETFramework_NETCLRInterop struct {
 	NumberofTLBimportsPersec uint32
 }
 
-func (c *collector) collect(ch chan<- prometheus.Metric) error {
+func (c *Collector) collect(ch chan<- prometheus.Metric) error {
 	var dst []Win32_PerfRawData_NETFramework_NETCLRInterop
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {
@@ -99,7 +103,6 @@ func (c *collector) collect(ch chan<- prometheus.Metric) error {
 	}
 
 	for _, process := range dst {
-
 		if process.Name == "_Global_" {
 			continue
 		}

pkg/collector/netframework_clrjit/netframework_clrjit.go

@@ -17,8 +17,8 @@ type Config struct{}
 
 var ConfigDefaults = Config{}
 
-// A collector is a Prometheus collector for WMI Win32_PerfRawData_NETFramework_NETCLRJit metrics
-type collector struct {
+// A Collector is a Prometheus Collector for WMI Win32_PerfRawData_NETFramework_NETCLRJit metrics
+type Collector struct {
 	logger log.Logger
 
 	NumberofMethodsJitted      *prometheus.Desc
@@ -27,29 +27,34 @@ type collector struct {
 	TotalNumberofILBytesJitted *prometheus.Desc
 }
 
-func New(logger log.Logger, _ *Config) types.Collector {
-	c := &collector{}
+func New(logger log.Logger, _ *Config) *Collector {
+	c := &Collector{}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(_ *kingpin.Application) types.Collector {
-	return &collector{}
+func NewWithFlags(_ *kingpin.Application) *Collector {
+	return &Collector{}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	c.NumberofMethodsJitted = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "jit_methods_total"),
 		"Displays the total number of methods JIT-compiled since the application started. This counter does not include pre-JIT-compiled methods.",
@@ -79,7 +84,7 @@ func (c *collector) Build() error {
 
 // Collect sends the metric values for each metric
 // to the provided prometheus Metric channel.
-func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	if err := c.collect(ch); err != nil {
 		_ = level.Error(c.logger).Log("msg", "failed collecting win32_perfrawdata_netframework_netclrjit metrics", "err", err)
 		return err
@@ -99,7 +104,7 @@ type Win32_PerfRawData_NETFramework_NETCLRJit struct {
 	TotalNumberofILBytesJitted uint32
 }
 
-func (c *collector) collect(ch chan<- prometheus.Metric) error {
+func (c *Collector) collect(ch chan<- prometheus.Metric) error {
 	var dst []Win32_PerfRawData_NETFramework_NETCLRJit
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {
@@ -107,7 +112,6 @@ func (c *collector) collect(ch chan<- prometheus.Metric) error {
 	}
 
 	for _, process := range dst {
-
 		if process.Name == "_Global_" {
 			continue
 		}

pkg/collector/netframework_clrloading/netframework_clrloading.go

@@ -17,8 +17,8 @@ type Config struct{}
 
 var ConfigDefaults = Config{}
 
-// A collector is a Prometheus collector for WMI Win32_PerfRawData_NETFramework_NETCLRLoading metrics
-type collector struct {
+// A Collector is a Prometheus Collector for WMI Win32_PerfRawData_NETFramework_NETCLRLoading metrics
+type Collector struct {
 	logger log.Logger
 
 	BytesinLoaderHeap         *prometheus.Desc
@@ -32,29 +32,34 @@ type collector struct {
 	TotalNumberofLoadFailures *prometheus.Desc
 }
 
-func New(logger log.Logger, _ *Config) types.Collector {
-	c := &collector{}
+func New(logger log.Logger, _ *Config) *Collector {
+	c := &Collector{}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(_ *kingpin.Application) types.Collector {
-	return &collector{}
+func NewWithFlags(_ *kingpin.Application) *Collector {
+	return &Collector{}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	c.BytesinLoaderHeap = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "loader_heap_size_bytes"),
 		"Displays the current size, in bytes, of the memory committed by the class loader across all application domains. Committed memory is the physical space reserved in the disk paging file.",
@@ -114,7 +119,7 @@ func (c *collector) Build() error {
 
 // Collect sends the metric values for each metric
 // to the provided prometheus Metric channel.
-func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	if err := c.collect(ch); err != nil {
 		_ = level.Error(c.logger).Log("msg", "failed collecting win32_perfrawdata_netframework_netclrloading metrics", "err", err)
 		return err
@@ -143,7 +148,7 @@ type Win32_PerfRawData_NETFramework_NETCLRLoading struct {
 	TotalNumberofLoadFailures uint32
 }
 
-func (c *collector) collect(ch chan<- prometheus.Metric) error {
+func (c *Collector) collect(ch chan<- prometheus.Metric) error {
 	var dst []Win32_PerfRawData_NETFramework_NETCLRLoading
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {
@@ -151,7 +156,6 @@ func (c *collector) collect(ch chan<- prometheus.Metric) error {
 	}
 
 	for _, process := range dst {
-
 		if process.Name == "_Global_" {
 			continue
 		}

pkg/collector/netframework_clrlocksandthreads/netframework_clrlocksandthreads.go

@@ -17,8 +17,8 @@ type Config struct{}
 
 var ConfigDefaults = Config{}
 
-// A collector is a Prometheus collector for WMI Win32_PerfRawData_NETFramework_NETCLRLocksAndThreads metrics
-type collector struct {
+// A Collector is a Prometheus Collector for WMI Win32_PerfRawData_NETFramework_NETCLRLocksAndThreads metrics
+type Collector struct {
 	logger log.Logger
 
 	CurrentQueueLength               *prometheus.Desc
@@ -30,29 +30,34 @@ type collector struct {
 	TotalNumberofContentions         *prometheus.Desc
 }
 
-func New(logger log.Logger, _ *Config) types.Collector {
-	c := &collector{}
+func New(logger log.Logger, _ *Config) *Collector {
+	c := &Collector{}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(_ *kingpin.Application) types.Collector {
-	return &collector{}
+func NewWithFlags(_ *kingpin.Application) *Collector {
+	return &Collector{}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	c.CurrentQueueLength = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "current_queue_length"),
 		"Displays the total number of threads that are currently waiting to acquire a managed lock in the application.",
@@ -100,7 +105,7 @@ func (c *collector) Build() error {
 
 // Collect sends the metric values for each metric
 // to the provided prometheus Metric channel.
-func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	if err := c.collect(ch); err != nil {
 		_ = level.Error(c.logger).Log("msg", "failed collecting win32_perfrawdata_netframework_netclrlocksandthreads metrics", "err", err)
 		return err
@@ -123,7 +128,7 @@ type Win32_PerfRawData_NETFramework_NETCLRLocksAndThreads struct {
 	TotalNumberofContentions         uint32
 }
 
-func (c *collector) collect(ch chan<- prometheus.Metric) error {
+func (c *Collector) collect(ch chan<- prometheus.Metric) error {
 	var dst []Win32_PerfRawData_NETFramework_NETCLRLocksAndThreads
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {
@@ -131,7 +136,6 @@ func (c *collector) collect(ch chan<- prometheus.Metric) error {
 	}
 
 	for _, process := range dst {
-
 		if process.Name == "_Global_" {
 			continue
 		}

pkg/collector/netframework_clrmemory/netframework_clrmemory.go

@@ -17,8 +17,8 @@ type Config struct{}
 
 var ConfigDefaults = Config{}
 
-// A collector is a Prometheus collector for WMI Win32_PerfRawData_NETFramework_NETCLRMemory metrics
-type collector struct {
+// A Collector is a Prometheus Collector for WMI Win32_PerfRawData_NETFramework_NETCLRMemory metrics
+type Collector struct {
 	logger log.Logger
 
 	AllocatedBytes                     *prometheus.Desc
@@ -38,29 +38,34 @@ type collector struct {
 	PromotedMemoryfromGen1             *prometheus.Desc
 }
 
-func New(logger log.Logger, _ *Config) types.Collector {
-	c := &collector{}
+func New(logger log.Logger, _ *Config) *Collector {
+	c := &Collector{}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(_ *kingpin.Application) types.Collector {
-	return &collector{}
+func NewWithFlags(_ *kingpin.Application) *Collector {
+	return &Collector{}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	c.AllocatedBytes = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "allocated_bytes_total"),
 		"Displays the total number of bytes allocated on the garbage collection heap.",
@@ -138,7 +143,7 @@ func (c *collector) Build() error {
 
 // Collect sends the metric values for each metric
 // to the provided prometheus Metric channel.
-func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	if err := c.collect(ch); err != nil {
 		_ = level.Error(c.logger).Log("msg", "failed collecting win32_perfrawdata_netframework_netclrmemory metrics", "err", err)
 		return err
@@ -180,7 +185,7 @@ type Win32_PerfRawData_NETFramework_NETCLRMemory struct {
 	PromotedMemoryfromGen1             uint64
 }
 
-func (c *collector) collect(ch chan<- prometheus.Metric) error {
+func (c *Collector) collect(ch chan<- prometheus.Metric) error {
 	var dst []Win32_PerfRawData_NETFramework_NETCLRMemory
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {
@@ -188,7 +193,6 @@ func (c *collector) collect(ch chan<- prometheus.Metric) error {
 	}
 
 	for _, process := range dst {
-
 		if process.Name == "_Global_" {
 			continue
 		}

pkg/collector/netframework_clrremoting/netframework_clrremoting.go

@@ -17,8 +17,8 @@ type Config struct{}
 
 var ConfigDefaults = Config{}
 
-// A collector is a Prometheus collector for WMI Win32_PerfRawData_NETFramework_NETCLRRemoting metrics
-type collector struct {
+// A Collector is a Prometheus Collector for WMI Win32_PerfRawData_NETFramework_NETCLRRemoting metrics
+type Collector struct {
 	logger log.Logger
 
 	Channels                  *prometheus.Desc
@@ -29,29 +29,34 @@ type collector struct {
 	TotalRemoteCalls          *prometheus.Desc
 }
 
-func New(logger log.Logger, _ *Config) types.Collector {
-	c := &collector{}
+func New(logger log.Logger, _ *Config) *Collector {
+	c := &Collector{}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(_ *kingpin.Application) types.Collector {
-	return &collector{}
+func NewWithFlags(_ *kingpin.Application) *Collector {
+	return &Collector{}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	c.Channels = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "channels_total"),
 		"Displays the total number of remoting channels registered across all application domains since application started.",
@@ -93,7 +98,7 @@ func (c *collector) Build() error {
 
 // Collect sends the metric values for each metric
 // to the provided prometheus Metric channel.
-func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	if err := c.collect(ch); err != nil {
 		_ = level.Error(c.logger).Log("msg", "failed collecting win32_perfrawdata_netframework_netclrremoting metrics", "err", err)
 		return err
@@ -113,7 +118,7 @@ type Win32_PerfRawData_NETFramework_NETCLRRemoting struct {
 	TotalRemoteCalls               uint32
 }
 
-func (c *collector) collect(ch chan<- prometheus.Metric) error {
+func (c *Collector) collect(ch chan<- prometheus.Metric) error {
 	var dst []Win32_PerfRawData_NETFramework_NETCLRRemoting
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {
@@ -121,7 +126,6 @@ func (c *collector) collect(ch chan<- prometheus.Metric) error {
 	}
 
 	for _, process := range dst {
-
 		if process.Name == "_Global_" {
 			continue
 		}

pkg/collector/netframework_clrsecurity/netframework_clrsecurity.go

@@ -17,8 +17,8 @@ type Config struct{}
 
 var ConfigDefaults = Config{}
 
-// A collector is a Prometheus collector for WMI Win32_PerfRawData_NETFramework_NETCLRSecurity metrics
-type collector struct {
+// A Collector is a Prometheus Collector for WMI Win32_PerfRawData_NETFramework_NETCLRSecurity metrics
+type Collector struct {
 	logger log.Logger
 
 	NumberLinkTimeChecks *prometheus.Desc
@@ -27,29 +27,34 @@ type collector struct {
 	TotalRuntimeChecks   *prometheus.Desc
 }
 
-func New(logger log.Logger, _ *Config) types.Collector {
-	c := &collector{}
+func New(logger log.Logger, _ *Config) *Collector {
+	c := &Collector{}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(_ *kingpin.Application) types.Collector {
-	return &collector{}
+func NewWithFlags(_ *kingpin.Application) *Collector {
+	return &Collector{}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	c.NumberLinkTimeChecks = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "link_time_checks_total"),
 		"Displays the total number of link-time code access security checks since the application started.",
@@ -79,7 +84,7 @@ func (c *collector) Build() error {
 
 // Collect sends the metric values for each metric
 // to the provided prometheus Metric channel.
-func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	if err := c.collect(ch); err != nil {
 		_ = level.Error(c.logger).Log("msg", "failed collecting win32_perfrawdata_netframework_netclrsecurity metrics", "err", err)
 		return err
@@ -98,7 +103,7 @@ type Win32_PerfRawData_NETFramework_NETCLRSecurity struct {
 	TotalRuntimeChecks           uint32
 }
 
-func (c *collector) collect(ch chan<- prometheus.Metric) error {
+func (c *Collector) collect(ch chan<- prometheus.Metric) error {
 	var dst []Win32_PerfRawData_NETFramework_NETCLRSecurity
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {
@@ -106,7 +111,6 @@ func (c *collector) collect(ch chan<- prometheus.Metric) error {
 	}
 
 	for _, process := range dst {
-
 		if process.Name == "_Global_" {
 			continue
 		}

pkg/collector/nps/nps.go

@@ -17,8 +17,8 @@ type Config struct{}
 
 var ConfigDefaults = Config{}
 
-// collector is a Prometheus collector for WMI Win32_PerfRawData_IAS_NPSAuthenticationServer and Win32_PerfRawData_IAS_NPSAccountingServer metrics
-type collector struct {
+// Collector is a Prometheus Collector for WMI Win32_PerfRawData_IAS_NPSAuthenticationServer and Win32_PerfRawData_IAS_NPSAccountingServer metrics
+type Collector struct {
 	logger log.Logger
 
 	AccessAccepts           *prometheus.Desc
@@ -49,29 +49,34 @@ type collector struct {
 	AccountingUnknownType       *prometheus.Desc
 }
 
-func New(logger log.Logger, _ *Config) types.Collector {
-	c := &collector{}
+func New(logger log.Logger, _ *Config) *Collector {
+	c := &Collector{}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(_ *kingpin.Application) types.Collector {
-	return &collector{}
+func NewWithFlags(_ *kingpin.Application) *Collector {
+	return &Collector{}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	c.AccessAccepts = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "access_accepts"),
 		"(AccessAccepts)",
@@ -228,7 +233,7 @@ func (c *collector) Build() error {
 
 // Collect sends the metric values for each metric
 // to the provided prometheus Metric channel.
-func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	if err := c.CollectAccept(ch); err != nil {
 		_ = level.Error(c.logger).Log("msg", fmt.Sprintf("failed collecting NPS accept data: %s", err))
 		return err
@@ -279,7 +284,7 @@ type Win32_PerfRawData_IAS_NPSAccountingServer struct {
 
 // CollectAccept sends the metric values for each metric
 // to the provided prometheus Metric channel.
-func (c *collector) CollectAccept(ch chan<- prometheus.Metric) error {
+func (c *Collector) CollectAccept(ch chan<- prometheus.Metric) error {
 	var dst []Win32_PerfRawData_IAS_NPSAuthenticationServer
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {
@@ -367,7 +372,7 @@ func (c *collector) CollectAccept(ch chan<- prometheus.Metric) error {
 	return nil
 }
 
-func (c *collector) CollectAccounting(ch chan<- prometheus.Metric) error {
+func (c *Collector) CollectAccounting(ch chan<- prometheus.Metric) error {
 	var dst []Win32_PerfRawData_IAS_NPSAccountingServer
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {

pkg/collector/os/os.go

@@ -11,16 +11,15 @@ import (
 	"syscall"
 	"time"
 
+	"github.com/alecthomas/kingpin/v2"
+	"github.com/go-kit/log"
+	"github.com/go-kit/log/level"
 	"github.com/prometheus-community/windows_exporter/pkg/headers/kernel32"
 	"github.com/prometheus-community/windows_exporter/pkg/headers/netapi32"
 	"github.com/prometheus-community/windows_exporter/pkg/headers/psapi"
 	"github.com/prometheus-community/windows_exporter/pkg/headers/sysinfoapi"
 	"github.com/prometheus-community/windows_exporter/pkg/perflib"
 	"github.com/prometheus-community/windows_exporter/pkg/types"
-
-	"github.com/alecthomas/kingpin/v2"
-	"github.com/go-kit/log"
-	"github.com/go-kit/log/level"
 	"github.com/prometheus/client_golang/prometheus"
 	"golang.org/x/sys/windows/registry"
 )
@@ -31,8 +30,8 @@ type Config struct{}
 
 var ConfigDefaults = Config{}
 
-// A collector is a Prometheus collector for WMI metrics
-type collector struct {
+// A Collector is a Prometheus Collector for WMI metrics
+type Collector struct {
 	logger log.Logger
 
 	OSInformation           *prometheus.Desc
@@ -56,29 +55,34 @@ type pagingFileCounter struct {
 	UsagePeak float64 `perflib:"% Usage Peak"`
 }
 
-func New(logger log.Logger, _ *Config) types.Collector {
-	c := &collector{}
+func New(logger log.Logger, _ *Config) *Collector {
+	c := &Collector{}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(_ *kingpin.Application) types.Collector {
-	return &collector{}
+func NewWithFlags(_ *kingpin.Application) *Collector {
+	return &Collector{}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{"Paging File"}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	c.OSInformation = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "info"),
 		"OperatingSystem.Caption, OperatingSystem.Version",
@@ -162,7 +166,7 @@ func (c *collector) Build() error {
 
 // Collect sends the metric values for each metric
 // to the provided prometheus Metric channel.
-func (c *collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	if err := c.collect(ctx, ch); err != nil {
 		_ = level.Error(c.logger).Log("msg", "failed collecting os metrics", "err", err)
 		return err
@@ -188,7 +192,7 @@ type Win32_OperatingSystem struct {
 	Version                 string
 }
 
-func (c *collector) collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	nwgi, err := netapi32.GetWorkstationInfo()
 	if err != nil {
 		return err

pkg/collector/physical_disk/physical_disk.go

@@ -15,11 +15,7 @@ import (
 	"github.com/prometheus/client_golang/prometheus"
 )
 
-const (
-	Name                    = "physical_disk"
-	FlagPhysicalDiskExclude = "collector.physical_disk.disk-exclude"
-	FlagPhysicalDiskInclude = "collector.physical_disk.disk-include"
-)
+const Name = "physical_disk"
 
 type Config struct {
 	DiskInclude string `yaml:"disk_include"`
@@ -31,8 +27,8 @@ var ConfigDefaults = Config{
 	DiskExclude: "",
 }
 
-// A collector is a Prometheus collector for perflib PhysicalDisk metrics
-type collector struct {
+// A Collector is a Prometheus Collector for perflib PhysicalDisk metrics
+type Collector struct {
 	logger log.Logger
 
 	diskInclude *string
@@ -58,24 +54,25 @@ type collector struct {
 	diskExcludePattern *regexp.Regexp
 }
 
-func New(logger log.Logger, config *Config) types.Collector {
+func New(logger log.Logger, config *Config) *Collector {
 	if config == nil {
 		config = &ConfigDefaults
 	}
 
-	c := &collector{
+	c := &Collector{
 		diskExclude: &config.DiskExclude,
 		diskInclude: &config.DiskInclude,
 	}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(app *kingpin.Application) types.Collector {
-	c := &collector{}
+func NewWithFlags(app *kingpin.Application) *Collector {
+	c := &Collector{}
 
 	c.diskInclude = app.Flag(
-		FlagPhysicalDiskInclude,
+		"collector.physical_disk.disk-include",
 		"Regexp of disks to include. Disk number must both match include and not match exclude to be included.",
 	).Default(ConfigDefaults.DiskInclude).PreAction(func(_ *kingpin.ParseContext) error {
 		c.diskIncludeSet = true
@@ -83,28 +80,33 @@ func NewWithFlags(app *kingpin.Application) types.Collector {
 	}).String()
 
 	c.diskExclude = app.Flag(
-		FlagPhysicalDiskExclude,
+		"collector.physical_disk.disk-exclude",
 		"Regexp of disks to exclude. Disk number must both match include and not match exclude to be included.",
 	).Default(ConfigDefaults.DiskExclude).PreAction(func(_ *kingpin.ParseContext) error {
 		c.diskExcludeSet = true
 		return nil
 	}).String()
+
 	return c
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{"PhysicalDisk"}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	c.RequestsQueued = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "requests_queued"),
 		"The number of requests queued to the disk (PhysicalDisk.CurrentDiskQueueLength)",
@@ -205,7 +207,7 @@ func (c *collector) Build() error {
 
 // Collect sends the metric values for each metric
 // to the provided prometheus Metric channel.
-func (c *collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	if err := c.collect(ctx, ch); err != nil {
 		_ = level.Error(c.logger).Log("msg", "failed collecting physical_disk metrics", "err", err)
 		return err
@@ -232,7 +234,7 @@ type PhysicalDisk struct {
 	AvgDiskSecPerTransfer  float64 `perflib:"Avg. Disk sec/Transfer"`
 }
 
-func (c *collector) collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	var dst []PhysicalDisk
 	if err := perflib.UnmarshalObject(ctx.PerfObjects["PhysicalDisk"], &dst, c.logger); err != nil {
 		return err

pkg/collector/printer/printer.go

@@ -10,18 +10,12 @@ import (
 	"github.com/alecthomas/kingpin/v2"
 	"github.com/go-kit/log"
 	"github.com/go-kit/log/level"
-	"github.com/prometheus/client_golang/prometheus"
-
 	"github.com/prometheus-community/windows_exporter/pkg/types"
 	"github.com/prometheus-community/windows_exporter/pkg/wmi"
+	"github.com/prometheus/client_golang/prometheus"
 )
 
-const (
-	Name = "printer"
-
-	FlagPrinterInclude = "collector.printer.include"
-	FlagPrinterExclude = "collector.printer.exclude"
-)
+const Name = "printer"
 
 // printerStatusMap source: https://learn.microsoft.com/en-us/windows/win32/cimwin32prov/win32-printer#:~:text=Power%20Save-,PrinterStatus,Offline%20(7),-PrintJobDataType
 var printerStatusMap = map[uint16]string{
@@ -35,16 +29,16 @@ var printerStatusMap = map[uint16]string{
 }
 
 type Config struct {
-	Include string `yaml:"printer_include"`
-	Exclude string `yaml:"printer_exclude"`
+	PrinterInclude string `yaml:"printer_include"`
+	PrinterExclude string `yaml:"printer_exclude"`
 }
 
 var ConfigDefaults = Config{
-	Include: ".+",
-	Exclude: "",
+	PrinterInclude: ".+",
+	PrinterExclude: "",
 }
 
-type collector struct {
+type Collector struct {
 	logger log.Logger
 
 	printerInclude *string
@@ -58,37 +52,44 @@ type collector struct {
 	printerExcludePattern *regexp.Regexp
 }
 
-func New(logger log.Logger, config *Config) types.Collector {
+func New(logger log.Logger, config *Config) *Collector {
 	if config == nil {
 		config = &ConfigDefaults
 	}
-	c := &collector{
-		printerInclude: &config.Include,
-		printerExclude: &config.Exclude,
+	c := &Collector{
+		printerInclude: &config.PrinterInclude,
+		printerExclude: &config.PrinterExclude,
 	}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(app *kingpin.Application) types.Collector {
-	c := &collector{
+func NewWithFlags(app *kingpin.Application) *Collector {
+	c := &Collector{
 		printerInclude: app.Flag(
-			FlagPrinterInclude,
+			"collector.printer.include",
 			"Regular expression to match printers to collect metrics for",
-		).Default(ConfigDefaults.Include).String(),
+		).Default(ConfigDefaults.PrinterInclude).String(),
+
 		printerExclude: app.Flag(
-			FlagPrinterExclude,
+			"collector.printer.exclude",
 			"Regular expression to match printers to exclude",
-		).Default(ConfigDefaults.Exclude).String(),
+		).Default(ConfigDefaults.PrinterExclude).String(),
 	}
+
 	return c
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	c.printerJobStatus = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "job_status"),
 		"A counter of printer jobs by status",
@@ -117,9 +118,9 @@ func (c *collector) Build() error {
 	return err
 }
 
-func (c *collector) GetName() string { return Name }
+func (c *Collector) GetName() string { return Name }
 
-func (c *collector) GetPerfCounter() ([]string, error) { return []string{"Printer"}, nil }
+func (c *Collector) GetPerfCounter() ([]string, error) { return []string{"Printer"}, nil }
 
 type win32_Printer struct {
 	Name                   string
@@ -133,7 +134,7 @@ type win32_PrintJob struct {
 	Status string
 }
 
-func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	if err := c.collectPrinterStatus(ch); err != nil {
 		_ = level.Error(c.logger).Log("msg", "failed to collect printer status metrics", "err", err)
 		return err
@@ -145,7 +146,7 @@ func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric)
 	return nil
 }
 
-func (c *collector) collectPrinterStatus(ch chan<- prometheus.Metric) error {
+func (c *Collector) collectPrinterStatus(ch chan<- prometheus.Metric) error {
 	var printers []win32_Printer
 	q := wmi.QueryAll(&printers, c.logger)
 	if err := wmi.Query(q, &printers); err != nil {
@@ -184,7 +185,7 @@ func (c *collector) collectPrinterStatus(ch chan<- prometheus.Metric) error {
 	return nil
 }
 
-func (c *collector) collectPrinterJobStatus(ch chan<- prometheus.Metric) error {
+func (c *Collector) collectPrinterJobStatus(ch chan<- prometheus.Metric) error {
 	var printJobs []win32_PrintJob
 	q := wmi.QueryAll(&printJobs, c.logger)
 	if err := wmi.Query(q, &printJobs); err != nil {
@@ -209,7 +210,7 @@ type PrintJobStatusGroup struct {
 	status      string
 }
 
-func (c *collector) groupPrintJobs(printJobs []win32_PrintJob) map[PrintJobStatusGroup]int {
+func (c *Collector) groupPrintJobs(printJobs []win32_PrintJob) map[PrintJobStatusGroup]int {
 	groupedPrintJobs := make(map[PrintJobStatusGroup]int)
 	for _, printJob := range printJobs {
 		printerName := strings.Split(printJob.Name, ",")[0]

pkg/collector/printer/printer_test.go

@@ -4,7 +4,6 @@ import (
 	"testing"
 
 	"github.com/alecthomas/kingpin/v2"
-
 	"github.com/prometheus-community/windows_exporter/pkg/collector/printer"
 	"github.com/prometheus-community/windows_exporter/pkg/testutils"
 )
@@ -12,6 +11,6 @@ import (
 func BenchmarkCollector(b *testing.B) {
 	// Whitelist is not set in testing context (kingpin flags not parsed), causing the collector to skip all printers.
 	printersInclude := ".+"
-	kingpin.CommandLine.GetArg(printer.FlagPrinterInclude).StringVar(&printersInclude)
+	kingpin.CommandLine.GetArg("collector.printer.include").StringVar(&printersInclude)
 	testutils.FuncBenchmarkCollector(b, "printer", printer.NewWithFlags)
 }

pkg/collector/process/process.go

@@ -5,7 +5,6 @@ package process
 import (
 	"errors"
 	"fmt"
-	"golang.org/x/sys/windows"
 	"regexp"
 	"strconv"
 	"strings"
@@ -19,15 +18,10 @@ import (
 	"github.com/prometheus-community/windows_exporter/pkg/utils"
 	"github.com/prometheus-community/windows_exporter/pkg/wmi"
 	"github.com/prometheus/client_golang/prometheus"
+	"golang.org/x/sys/windows"
 )
 
-const (
-	Name                    = "process"
-	FlagProcessExclude      = "collector.process.exclude"
-	FlagProcessInclude      = "collector.process.include"
-	FlagEnableWorkerProcess = "collector.process.iis"
-	FlagEnableReportOwner   = "collector.process.report-owner"
-)
+const Name = "process"
 
 type Config struct {
 	ProcessInclude      string `yaml:"process_include"`
@@ -43,7 +37,7 @@ var ConfigDefaults = Config{
 	EnableReportOwner:   false,
 }
 
-type collector struct {
+type Collector struct {
 	logger log.Logger
 
 	processInclude *string
@@ -74,58 +68,63 @@ type collector struct {
 	lookupCache map[string]string
 }
 
-func New(logger log.Logger, config *Config) types.Collector {
+func New(logger log.Logger, config *Config) *Collector {
 	if config == nil {
 		config = &ConfigDefaults
 	}
 
-	c := &collector{
+	c := &Collector{
 		processExclude:      &config.ProcessExclude,
 		processInclude:      &config.ProcessInclude,
 		enableWorkerProcess: &config.EnableWorkerProcess,
 	}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(app *kingpin.Application) types.Collector {
-	c := &collector{
+func NewWithFlags(app *kingpin.Application) *Collector {
+	c := &Collector{
 		processInclude: app.Flag(
-			FlagProcessInclude,
+			"collector.process.include",
 			"Regexp of processes to include. Process name must both match include and not match exclude to be included.",
 		).Default(ConfigDefaults.ProcessInclude).String(),
 
 		processExclude: app.Flag(
-			FlagProcessExclude,
+			"collector.process.exclude",
 			"Regexp of processes to exclude. Process name must both match include and not match exclude to be included.",
 		).Default(ConfigDefaults.ProcessExclude).String(),
 
 		enableWorkerProcess: app.Flag(
-			FlagEnableWorkerProcess,
+			"collector.process.iis",
 			"Enable IIS worker process name queries. May cause the collector to leak memory.",
 		).Default("false").Bool(),
 
 		enableReportOwner: app.Flag(
-			FlagEnableReportOwner,
+			"collector.process.report-owner",
 			"Enable reporting of process owner.",
 		).Default("false").Bool(),
 	}
 	return c
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{"Process"}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	if c.processInclude != nil && *c.processInclude == ".*" && utils.IsEmpty(c.processExclude) {
 		_ = level.Warn(c.logger).Log("msg", "No filters specified for process collector. This will generate a very large number of metrics!")
 	}
@@ -280,7 +279,7 @@ type WorkerProcess struct {
 	ProcessId   uint64
 }
 
-func (c *collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	data := make([]perflibProcess, 0)
 	err := perflib.UnmarshalObject(ctx.PerfObjects["Process"], &data, c.logger)
 	if err != nil {
@@ -482,7 +481,7 @@ func (c *collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metri
 }
 
 // ref: https://github.com/microsoft/hcsshim/blob/8beabacfc2d21767a07c20f8dd5f9f3932dbf305/internal/uvm/stats.go#L25
-func (c *collector) getProcessOwner(pid int) (string, error) {
+func (c *Collector) getProcessOwner(pid int) (string, error) {
 	p, err := windows.OpenProcess(windows.PROCESS_QUERY_LIMITED_INFORMATION, false, uint32(pid))
 	if errors.Is(err, syscall.Errno(0x57)) { // invalid parameter, for PIDs that don't exist
 		return "", errors.New("process not found")

pkg/collector/process/process_test.go

@@ -9,9 +9,9 @@ import (
 )
 
 func BenchmarkProcessCollector(b *testing.B) {
-	// Include is not set in testing context (kingpin flags not parsed), causing the collector to skip all processes.
+	// PrinterInclude is not set in testing context (kingpin flags not parsed), causing the collector to skip all processes.
 	localProcessInclude := ".+"
-	kingpin.CommandLine.GetArg(process.FlagProcessInclude).StringVar(&localProcessInclude)
+	kingpin.CommandLine.GetArg("collector.process.include").StringVar(&localProcessInclude)
 	// No context name required as collector source is WMI
 	testutils.FuncBenchmarkCollector(b, process.Name, process.NewWithFlags)
 }

pkg/collector/prometheus.go

@@ -112,7 +112,7 @@ func (coll *Prometheus) Collect(ch chan<- prometheus.Metric) {
 	}()
 
 	for name, c := range coll.collectors.collectors {
-		go func(name string, c types.Collector) {
+		go func(name string, c Collector) {
 			defer wg.Done()
 			outcome := coll.execute(name, c, scrapeContext, metricsBuffer)
 			l.Lock()
@@ -171,7 +171,7 @@ func (coll *Prometheus) Collect(ch chan<- prometheus.Metric) {
 	l.Unlock()
 }
 
-func (coll *Prometheus) execute(name string, c types.Collector, ctx *types.ScrapeContext, ch chan<- prometheus.Metric) collectorOutcome {
+func (coll *Prometheus) execute(name string, c Collector, ctx *types.ScrapeContext, ch chan<- prometheus.Metric) collectorOutcome {
 	t := time.Now()
 	err := c.Collect(ctx, ch)
 	duration := time.Since(t).Seconds()

pkg/collector/remote_fx/remote_fx.go

@@ -20,12 +20,12 @@ type Config struct{}
 
 var ConfigDefaults = Config{}
 
-// collector
-// A RemoteFxNetworkCollector is a Prometheus collector for
+// Collector
+// A RemoteFxNetworkCollector is a Prometheus Collector for
 // WMI Win32_PerfRawData_Counters_RemoteFXNetwork & Win32_PerfRawData_Counters_RemoteFXGraphics metrics
 // https://wutils.com/wmi/root/cimv2/win32_perfrawdata_counters_remotefxnetwork/
 // https://wutils.com/wmi/root/cimv2/win32_perfrawdata_counters_remotefxgraphics/
-type collector struct {
+type Collector struct {
 	logger log.Logger
 
 	// net
@@ -53,29 +53,34 @@ type collector struct {
 	SourceFramesPerSecond                       *prometheus.Desc
 }
 
-func New(logger log.Logger, _ *Config) types.Collector {
-	c := &collector{}
+func New(logger log.Logger, _ *Config) *Collector {
+	c := &Collector{}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(_ *kingpin.Application) types.Collector {
-	return &collector{}
+func NewWithFlags(_ *kingpin.Application) *Collector {
+	return &Collector{}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{"RemoteFX Network", "RemoteFX Graphics"}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	// net
 	c.BaseTCPRTT = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "net_base_tcp_rtt_seconds"),
@@ -204,7 +209,7 @@ func (c *collector) Build() error {
 
 // Collect sends the metric values for each metric
 // to the provided prometheus Metric channel.
-func (c *collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	if err := c.collectRemoteFXNetworkCount(ctx, ch); err != nil {
 		_ = level.Error(c.logger).Log("msg", "failed collecting terminal services session count metrics", "err", err)
 		return err
@@ -233,7 +238,7 @@ type perflibRemoteFxNetwork struct {
 	RetransmissionRate       float64 `perflib:"Percentage of packets that have been retransmitted"`
 }
 
-func (c *collector) collectRemoteFXNetworkCount(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) collectRemoteFXNetworkCount(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	dst := make([]perflibRemoteFxNetwork, 0)
 	err := perflib.UnmarshalObject(ctx.PerfObjects["RemoteFX Network"], &dst, c.logger)
 	if err != nil {
@@ -343,7 +348,7 @@ type perflibRemoteFxGraphics struct {
 	SourceFramesPerSecond                              float64 `perflib:"Source Frames/Second"`
 }
 
-func (c *collector) collectRemoteFXGraphicsCounters(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) collectRemoteFXGraphicsCounters(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	dst := make([]perflibRemoteFxGraphics, 0)
 	err := perflib.UnmarshalObject(ctx.PerfObjects["RemoteFX Graphics"], &dst, c.logger)
 	if err != nil {

pkg/collector/scheduled_task/scheduled_task.go

@@ -9,13 +9,12 @@ import (
 	"runtime"
 	"strings"
 
-	"github.com/prometheus-community/windows_exporter/pkg/types"
-
 	"github.com/alecthomas/kingpin/v2"
 	"github.com/go-kit/log"
 	"github.com/go-kit/log/level"
 	"github.com/go-ole/go-ole"
 	"github.com/go-ole/go-ole/oleutil"
+	"github.com/prometheus-community/windows_exporter/pkg/types"
 	"github.com/prometheus/client_golang/prometheus"
 )
 
@@ -36,7 +35,7 @@ var ConfigDefaults = Config{
 	TaskInclude: ".+",
 }
 
-type collector struct {
+type Collector struct {
 	logger log.Logger
 
 	taskExclude *string
@@ -76,21 +75,22 @@ type ScheduledTask struct {
 
 type ScheduledTasks []ScheduledTask
 
-func New(logger log.Logger, config *Config) types.Collector {
+func New(logger log.Logger, config *Config) *Collector {
 	if config == nil {
 		config = &ConfigDefaults
 	}
 
-	c := &collector{
+	c := &Collector{
 		taskExclude: &config.TaskExclude,
 		taskInclude: &config.TaskInclude,
 	}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(app *kingpin.Application) types.Collector {
-	c := &collector{
+func NewWithFlags(app *kingpin.Application) *Collector {
+	c := &Collector{
 		taskInclude: app.Flag(
 			FlagScheduledTaskInclude,
 			"Regexp of tasks to include. Task path must both match include and not match exclude to be included.",
@@ -105,19 +105,23 @@ func NewWithFlags(app *kingpin.Application) types.Collector {
 	return c
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	c.LastResult = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "last_result"),
 		"The result that was returned the last time the registered task was run",
@@ -154,7 +158,7 @@ func (c *collector) Build() error {
 	return nil
 }
 
-func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	if err := c.collect(ch); err != nil {
 		_ = level.Error(c.logger).Log("msg", "failed collecting user metrics", "err", err)
 		return err
@@ -165,7 +169,7 @@ func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric)
 
 var TASK_STATES = []string{"disabled", "queued", "ready", "running", "unknown"}
 
-func (c *collector) collect(ch chan<- prometheus.Metric) error {
+func (c *Collector) collect(ch chan<- prometheus.Metric) error {
 	scheduledTasks, err := getScheduledTasks()
 	if err != nil {
 		return err
@@ -379,7 +383,9 @@ func parseTask(task *ole.IDispatch) (scheduledTask ScheduledTask, err error) {
 
 	scheduledTask.Name = taskNameVar.ToString()
 	scheduledTask.Path = strings.ReplaceAll(taskPathVar.ToString(), "\\", "/")
-	scheduledTask.Enabled = taskEnabledVar.Value().(bool)
+	if val, ok := taskEnabledVar.Value().(bool); ok {
+		scheduledTask.Enabled = val
+	}
 	scheduledTask.State = TaskState(taskStateVar.Val)
 	scheduledTask.MissedRunsCount = float64(taskNumberOfMissedRunsVar.Val)
 	scheduledTask.LastTaskResult = TaskResult(taskLastTaskResultVar.Val)

pkg/collector/service/service.go

@@ -21,12 +21,7 @@ import (
 	"golang.org/x/sys/windows/svc/mgr"
 )
 
-const (
-	Name                   = "service"
-	FlagServiceWhereClause = "collector.service.services-where"
-	FlagServiceUseAPI      = "collector.service.use-api"
-	FlagServiceCollectorV2 = "collector.service.v2"
-)
+const Name = "service"
 
 type Config struct {
 	ServiceWhereClause string `yaml:"service_where_clause"`
@@ -40,8 +35,8 @@ var ConfigDefaults = Config{
 	V2:                 false,
 }
 
-// A collector is a Prometheus collector for WMI Win32_Service metrics
-type collector struct {
+// A Collector is a Prometheus Collector for WMI Win32_Service metrics
+type Collector struct {
 	logger log.Logger
 
 	serviceWhereClause *string
@@ -55,49 +50,54 @@ type collector struct {
 	StateV2     *prometheus.Desc
 }
 
-func New(logger log.Logger, config *Config) types.Collector {
+func New(logger log.Logger, config *Config) *Collector {
 	if config == nil {
 		config = &ConfigDefaults
 	}
 
-	c := &collector{
+	c := &Collector{
 		serviceWhereClause: &config.ServiceWhereClause,
 		useAPI:             &config.UseAPI,
 	}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(app *kingpin.Application) types.Collector {
-	return &collector{
+func NewWithFlags(app *kingpin.Application) *Collector {
+	return &Collector{
 		serviceWhereClause: app.Flag(
-			FlagServiceWhereClause,
+			"collector.service.services-where",
 			"WQL 'where' clause to use in WMI metrics query. Limits the response to the services you specify and reduces the size of the response.",
 		).Default(ConfigDefaults.ServiceWhereClause).String(),
 		useAPI: app.Flag(
-			FlagServiceUseAPI,
+			"collector.service.use-api",
 			"Use API calls to collect service data instead of WMI. Flag 'collector.service.services-where' won't be effective.",
 		).Default(strconv.FormatBool(ConfigDefaults.UseAPI)).Bool(),
 		v2: app.Flag(
-			FlagServiceCollectorV2,
+			"collector.service.v2",
 			"Enable V2 service collector. This collector can services state much more efficiently, can't provide general service information.",
 		).Default(strconv.FormatBool(ConfigDefaults.V2)).Bool(),
 	}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	if utils.IsEmpty(c.serviceWhereClause) {
 		_ = level.Warn(c.logger).Log("msg", "No where-clause specified for service collector. This will generate a very large number of metrics!")
 	}
@@ -141,7 +141,7 @@ func (c *collector) Build() error {
 
 // Collect sends the metric values for each metric
 // to the provided prometheus Metric channel.
-func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	var err error
 
 	switch {
@@ -224,7 +224,7 @@ var (
 	}
 )
 
-func (c *collector) collectWMI(ch chan<- prometheus.Metric) error {
+func (c *Collector) collectWMI(ch chan<- prometheus.Metric) error {
 	var dst []Win32_Service
 	q := wmi.QueryAllWhere(&dst, *c.serviceWhereClause, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {
@@ -292,7 +292,7 @@ func (c *collector) collectWMI(ch chan<- prometheus.Metric) error {
 	return nil
 }
 
-func (c *collector) collectAPI(ch chan<- prometheus.Metric) error {
+func (c *Collector) collectAPI(ch chan<- prometheus.Metric) error {
 	svcmgrConnection, err := mgr.Connect()
 	if err != nil {
 		return err
@@ -384,7 +384,7 @@ func (c *collector) collectAPI(ch chan<- prometheus.Metric) error {
 	return nil
 }
 
-func (c *collector) collectAPIV2(ch chan<- prometheus.Metric) error {
+func (c *Collector) collectAPIV2(ch chan<- prometheus.Metric) error {
 	services, err := c.queryAllServiceStates()
 	if err != nil {
 		_ = level.Warn(c.logger).Log("msg", "Failed to query services", "err", err)
@@ -428,7 +428,7 @@ func (c *collector) collectAPIV2(ch chan<- prometheus.Metric) error {
 // Copyright 2016-present Datadog, Inc.
 //
 // Source: https://github.com/DataDog/datadog-agent/blob/afbd8b6c87939c92610c654cb07fdfd439e4fb27/pkg/util/winutil/scmmonitor.go#L61-L96
-func (c *collector) queryAllServiceStates() ([]windows.ENUM_SERVICE_STATUS_PROCESS, error) {
+func (c *Collector) queryAllServiceStates() ([]windows.ENUM_SERVICE_STATUS_PROCESS, error) {
 	// EnumServiceStatusEx requires only SC_MANAGER_ENUM_SERVICE.
 	h, err := windows.OpenSCManager(nil, nil, windows.SC_MANAGER_ENUMERATE_SERVICE)
 	if err != nil {

pkg/collector/smb/smb.go

@@ -16,11 +16,7 @@ import (
 	"github.com/prometheus/client_golang/prometheus"
 )
 
-const (
-	Name                     = "smb"
-	FlagSmbListAllCollectors = "collectors.smb.list"
-	FlagSmbCollectorsEnabled = "collectors.smb.enabled"
-)
+const Name = "smb"
 
 type Config struct {
 	CollectorsEnabled string `yaml:"collectors_enabled"`
@@ -30,66 +26,72 @@ var ConfigDefaults = Config{
 	CollectorsEnabled: "",
 }
 
-type collector struct {
+type Collector struct {
 	logger log.Logger
 
 	smbListAllCollectors *bool
 	smbCollectorsEnabled *string
 
-	TreeConnectCount     *prometheus.Desc
-	CurrentOpenFileCount *prometheus.Desc
+	treeConnectCount     *prometheus.Desc
+	currentOpenFileCount *prometheus.Desc
 
 	enabledCollectors []string
 }
 
-// All available collector functions
+// All available Collector functions
 var smbAllCollectorNames = []string{
 	"ServerShares",
 }
 
-func New(logger log.Logger, config *Config) types.Collector {
+func New(logger log.Logger, config *Config) *Collector {
 	if config == nil {
 		config = &ConfigDefaults
 	}
 
 	smbListAllCollectors := false
-	c := &collector{
+	c := &Collector{
 		smbCollectorsEnabled: &config.CollectorsEnabled,
 		smbListAllCollectors: &smbListAllCollectors,
 	}
+
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(app *kingpin.Application) types.Collector {
-	return &collector{
+func NewWithFlags(app *kingpin.Application) *Collector {
+	return &Collector{
 		smbListAllCollectors: app.Flag(
-			FlagSmbListAllCollectors,
+			"collectors.smb.list",
 			"List the collectors along with their perflib object name/ids",
 		).Bool(),
 
 		smbCollectorsEnabled: app.Flag(
-			FlagSmbCollectorsEnabled,
+			"collectors.smb.enabled",
 			"Comma-separated list of collectors to use. Defaults to all, if not specified.",
 		).Default(ConfigDefaults.CollectorsEnabled).String(),
 	}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{
 		"SMB Server Shares",
 	}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	// desc creates a new prometheus description
 	desc := func(metricName string, description string, labels ...string) *prometheus.Desc {
 		return prometheus.NewDesc(
@@ -100,8 +102,8 @@ func (c *collector) Build() error {
 		)
 	}
 
-	c.CurrentOpenFileCount = desc("server_shares_current_open_file_count", "Current total count open files on the SMB Server")
-	c.TreeConnectCount = desc("server_shares_tree_connect_count", "Count of user connections to the SMB Server")
+	c.currentOpenFileCount = desc("server_shares_current_open_file_count", "Current total count open files on the SMB Server")
+	c.treeConnectCount = desc("server_shares_tree_connect_count", "Count of user connections to the SMB Server")
 
 	c.enabledCollectors = make([]string, 0, len(smbAllCollectorNames))
 
@@ -110,10 +112,11 @@ func (c *collector) Build() error {
 	}
 
 	if *c.smbListAllCollectors {
-		fmt.Printf("%-32s %-32s\n", "Collector Name", "Perflib Object")
+		fmt.Printf("%-32s %-32s\n", "Collector Name", "Perflib Object") //nolint:forbidigo
 		for _, cname := range smbAllCollectorNames {
-			fmt.Printf("%-32s %-32s\n", cname, collectorDesc[cname])
+			fmt.Printf("%-32s %-32s\n", cname, collectorDesc[cname]) //nolint:forbidigo
 		}
+
 		os.Exit(0)
 	}
 
@@ -135,7 +138,7 @@ func (c *collector) Build() error {
 }
 
 // Collect collects smb metrics and sends them to prometheus
-func (c *collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	collectorFuncs := map[string]func(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error{
 		"ServerShares": c.collectServerShares,
 	}
@@ -157,7 +160,7 @@ type perflibServerShares struct {
 	TreeConnectCount     float64 `perflib:"Tree Connect Count"`
 }
 
-func (c *collector) collectServerShares(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) collectServerShares(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	var data []perflibServerShares
 	if err := perflib.UnmarshalObject(ctx.PerfObjects["SMB Server Shares"], &data, c.logger); err != nil {
 		return err
@@ -169,23 +172,22 @@ func (c *collector) collectServerShares(ctx *types.ScrapeContext, ch chan<- prom
 		}
 
 		ch <- prometheus.MustNewConstMetric(
-			c.CurrentOpenFileCount,
+			c.currentOpenFileCount,
 			prometheus.CounterValue,
 			instance.CurrentOpenFileCount,
 		)
 
 		ch <- prometheus.MustNewConstMetric(
-			c.TreeConnectCount,
+			c.treeConnectCount,
 			prometheus.CounterValue,
 			instance.TreeConnectCount,
 		)
-
 	}
 	return nil
 }
 
 // toLabelName converts strings to lowercase and replaces all whitespaces and dots with underscores
-func (c *collector) toLabelName(name string) string {
+func (c *Collector) toLabelName(name string) string {
 	s := strings.ReplaceAll(strings.Join(strings.Fields(strings.ToLower(name)), "_"), ".", "_")
 	s = strings.ReplaceAll(s, "__", "_")
 	return s

pkg/collector/smbclient/smbclient.go

@@ -18,8 +18,6 @@ import (
 
 const (
 	Name = "smbclient"
-	FlagSmbClientListAllCollectors = "collectors.smbclient.list"
-	FlagSmbClientCollectorsEnabled = "collectors.smbclient.enabled"
 )
 
 type Config struct {
@@ -30,7 +28,7 @@ var ConfigDefaults = Config{
 	CollectorsEnabled: "",
 }
 
-type collector struct {
+type Collector struct {
 	logger log.Logger
 
 	smbclientListAllCollectors *bool
@@ -68,49 +66,54 @@ var smbclientAllCollectorNames = []string{
 	"ClientShares",
 }
 
-func New(logger log.Logger, config *Config) types.Collector {
+func New(logger log.Logger, config *Config) *Collector {
 	if config == nil {
 		config = &ConfigDefaults
 	}
 
 	smbclientListAllCollectors := false
-	c := &collector{
+	c := &Collector{
 		smbclientCollectorsEnabled: &config.CollectorsEnabled,
 		smbclientListAllCollectors: &smbclientListAllCollectors,
 	}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(app *kingpin.Application) types.Collector {
-	return &collector{
+func NewWithFlags(app *kingpin.Application) *Collector {
+	return &Collector{
 		smbclientListAllCollectors: app.Flag(
-			FlagSmbClientListAllCollectors,
+			"collectors.smbclient.list",
 			"List the collectors along with their perflib object name/ids",
 		).Bool(),
 
 		smbclientCollectorsEnabled: app.Flag(
-			FlagSmbClientCollectorsEnabled,
+			"collectors.smbclient.enabled",
 			"Comma-separated list of collectors to use. Defaults to all, if not specified.",
 		).Default(ConfigDefaults.CollectorsEnabled).String(),
 	}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{
 		"SMB Client Shares",
 	}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	// desc creates a new prometheus description
 	desc := func(metricName string, description string, labels []string) *prometheus.Desc {
 		return prometheus.NewDesc(
@@ -213,10 +216,11 @@ func (c *collector) Build() error {
 	}
 
 	if *c.smbclientListAllCollectors {
-		fmt.Printf("%-32s %-32s\n", "Collector Name", "Perflib Object")
+		fmt.Printf("%-32s %-32s\n", "Collector Name", "Perflib Object") //nolint:forbidigo
 		for _, cname := range smbclientAllCollectorNames {
-			fmt.Printf("%-32s %-32s\n", cname, collectorDesc[cname])
+			fmt.Printf("%-32s %-32s\n", cname, collectorDesc[cname]) //nolint:forbidigo
 		}
+
 		os.Exit(0)
 	}
 
@@ -229,7 +233,7 @@ func (c *collector) Build() error {
 			if slices.Contains(smbclientAllCollectorNames, collectorName) {
 				c.enabledCollectors = append(c.enabledCollectors, collectorName)
 			} else {
-				return fmt.Errorf("unknown smbclient collector: %s", collectorName)
+				return fmt.Errorf("unknown smbclient Collector: %s", collectorName)
 			}
 		}
 	}
@@ -238,7 +242,7 @@ func (c *collector) Build() error {
 }
 
 // Collect collects smb client metrics and sends them to prometheus
-func (c *collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	collectorFuncs := map[string]func(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error{
 		"ClientShares": c.collectClientShares,
 	}
@@ -279,7 +283,7 @@ type perflibClientShares struct {
 	WriteRequestsPerSec                        float64 `perflib:"Write Requests/sec"`
 }
 
-func (c *collector) collectClientShares(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) collectClientShares(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	var data []perflibClientShares
 	if err := perflib.UnmarshalObject(ctx.PerfObjects["SMB Client Shares"], &data, c.logger); err != nil {
 		return err
@@ -441,7 +445,6 @@ func (c *collector) collectClientShares(ctx *types.ScrapeContext, ch chan<- prom
 			instance.WriteRequestsPerSec,
 			serverValue, shareValue,
 		)
-
 	}
 	return nil
 }

pkg/collector/smtp/smtp.go

@@ -14,12 +14,7 @@ import (
 	"github.com/prometheus/client_golang/prometheus"
 )
 
-const (
-	Name = "smtp"
-
-	FlagSmtpServerExclude = "collector.smtp.server-exclude"
-	FlagSmtpServerInclude = "collector.smtp.server-include"
-)
+const Name = "smtp"
 
 type Config struct {
 	ServerInclude string `yaml:"server_include"`
@@ -31,7 +26,7 @@ var ConfigDefaults = Config{
 	ServerExclude: "",
 }
 
-type collector struct {
+type Collector struct {
 	logger log.Logger
 
 	serverInclude *string
@@ -84,28 +79,29 @@ type collector struct {
 	serverExcludePattern *regexp.Regexp
 }
 
-func New(logger log.Logger, config *Config) types.Collector {
+func New(logger log.Logger, config *Config) *Collector {
 	if config == nil {
 		config = &ConfigDefaults
 	}
 
-	c := &collector{
+	c := &Collector{
 		serverExclude: &config.ServerExclude,
 		serverInclude: &config.ServerInclude,
 	}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(app *kingpin.Application) types.Collector {
-	c := &collector{
+func NewWithFlags(app *kingpin.Application) *Collector {
+	c := &Collector{
 		serverInclude: app.Flag(
-			FlagSmtpServerInclude,
+			"collector.smtp.server-include",
 			"Regexp of virtual servers to include. Server name must both match include and not match exclude to be included.",
 		).Default(ConfigDefaults.ServerInclude).String(),
 
 		serverExclude: app.Flag(
-			FlagSmtpServerExclude,
+			"collector.smtp.server-exclude",
 			"Regexp of virtual servers to exclude. Server name must both match include and not match exclude to be included.",
 		).Default(ConfigDefaults.ServerExclude).String(),
 	}
@@ -113,19 +109,23 @@ func NewWithFlags(app *kingpin.Application) types.Collector {
 	return c
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{"SMTP Server"}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	_ = level.Info(c.logger).Log("msg", "smtp collector is in an experimental state! Metrics for this collector have not been tested.")
 
 	c.BadmailedMessagesBadPickupFileTotal = prometheus.NewDesc(
@@ -398,7 +398,7 @@ func (c *collector) Build() error {
 
 // Collect sends the metric values for each metric
 // to the provided prometheus Metric channel.
-func (c *collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	if err := c.collect(ctx, ch); err != nil {
 		_ = level.Error(c.logger).Log("msg", "failed collecting smtp metrics", "err", err)
 		return err
@@ -454,7 +454,7 @@ type PerflibSMTPServer struct {
 	RoutingTableLookupsTotal                float64 `perflib:"Routing Table Lookups Total"`
 }
 
-func (c *collector) collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	var dst []PerflibSMTPServer
 	if err := perflib.UnmarshalObject(ctx.PerfObjects["SMTP Server"], &dst, c.logger); err != nil {
 		return err
@@ -753,7 +753,6 @@ func (c *collector) collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metri
 			server.RoutingTableLookupsTotal,
 			server.Name,
 		)
-
 	}
 	return nil
 }

pkg/collector/system/system.go

@@ -17,8 +17,8 @@ type Config struct{}
 
 var ConfigDefaults = Config{}
 
-// A collector is a Prometheus collector for WMI metrics
-type collector struct {
+// A Collector is a Prometheus Collector for WMI metrics
+type Collector struct {
 	logger log.Logger
 
 	ContextSwitchesTotal     *prometheus.Desc
@@ -29,29 +29,34 @@ type collector struct {
 	Threads                  *prometheus.Desc
 }
 
-func New(logger log.Logger, _ *Config) types.Collector {
-	c := &collector{}
+func New(logger log.Logger, _ *Config) *Collector {
+	c := &Collector{}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(_ *kingpin.Application) types.Collector {
-	return &collector{}
+func NewWithFlags(_ *kingpin.Application) *Collector {
+	return &Collector{}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{"System"}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	c.ContextSwitchesTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "context_switches_total"),
 		"Total number of context switches (WMI source: PerfOS_System.ContextSwitchesPersec)",
@@ -93,7 +98,7 @@ func (c *collector) Build() error {
 
 // Collect sends the metric values for each metric
 // to the provided prometheus Metric channel.
-func (c *collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	if err := c.collect(ctx, ch); err != nil {
 		_ = level.Error(c.logger).Log("msg", "failed collecting system metrics", "err", err)
 		return err
@@ -112,7 +117,7 @@ type system struct {
 	Threads                   float64 `perflib:"Threads"`
 }
 
-func (c *collector) collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	var dst []system
 	if err := perflib.UnmarshalObject(ctx.PerfObjects["System"], &dst, c.logger); err != nil {
 		return err

pkg/collector/tcp/tcp.go

@@ -17,8 +17,8 @@ type Config struct{}
 
 var ConfigDefaults = Config{}
 
-// A collector is a Prometheus collector for WMI Win32_PerfRawData_Tcpip_TCPv{4,6} metrics
-type collector struct {
+// A Collector is a Prometheus Collector for WMI Win32_PerfRawData_Tcpip_TCPv{4,6} metrics
+type Collector struct {
 	logger log.Logger
 
 	ConnectionFailures         *prometheus.Desc
@@ -32,29 +32,34 @@ type collector struct {
 	SegmentsSentTotal          *prometheus.Desc
 }
 
-func New(logger log.Logger, _ *Config) types.Collector {
-	c := &collector{}
+func New(logger log.Logger, _ *Config) *Collector {
+	c := &Collector{}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(_ *kingpin.Application) types.Collector {
-	return &collector{}
+func NewWithFlags(_ *kingpin.Application) *Collector {
+	return &Collector{}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{"TCPv4"}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	c.ConnectionFailures = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "connection_failures_total"),
 		"(TCP.ConnectionFailures)",
@@ -114,7 +119,7 @@ func (c *collector) Build() error {
 
 // Collect sends the metric values for each metric
 // to the provided prometheus Metric channel.
-func (c *collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	if err := c.collect(ctx, ch); err != nil {
 		_ = level.Error(c.logger).Log("msg", "failed collecting tcp metrics", "err", err)
 		return err
@@ -137,7 +142,7 @@ type tcp struct {
 	SegmentsSentPersec          float64 `perflib:"Segments Sent/sec"`
 }
 
-func writeTCPCounters(metrics tcp, labels []string, c *collector, ch chan<- prometheus.Metric) {
+func writeTCPCounters(metrics tcp, labels []string, c *Collector, ch chan<- prometheus.Metric) {
 	ch <- prometheus.MustNewConstMetric(
 		c.ConnectionFailures,
 		prometheus.CounterValue,
@@ -194,7 +199,7 @@ func writeTCPCounters(metrics tcp, labels []string, c *collector, ch chan<- prom
 	)
 }
 
-func (c *collector) collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	var dst []tcp
 
 	// TCPv4 counters

pkg/collector/teradici_pcoip/teradici_pcoip.go

@@ -19,13 +19,13 @@ type Config struct{}
 
 var ConfigDefaults = Config{}
 
-// collector is a Prometheus collector for WMI metrics:
+// Collector is a Prometheus Collector for WMI metrics:
 // win32_PerfRawData_TeradiciPerf_PCoIPSessionAudioStatistics
 // win32_PerfRawData_TeradiciPerf_PCoIPSessionGeneralStatistics
 // win32_PerfRawData_TeradiciPerf_PCoIPSessionImagingStatistics
 // win32_PerfRawData_TeradiciPerf_PCoIPSessionNetworkStatistics
 // win32_PerfRawData_TeradiciPerf_PCoIPSessionUsbStatistics
-type collector struct {
+type Collector struct {
 	logger log.Logger
 
 	AudioBytesReceived       *prometheus.Desc
@@ -71,29 +71,34 @@ type collector struct {
 	USBTXBWkbitPersec *prometheus.Desc
 }
 
-func New(logger log.Logger, _ *Config) types.Collector {
-	c := &collector{}
+func New(logger log.Logger, _ *Config) *Collector {
+	c := &Collector{}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(_ *kingpin.Application) types.Collector {
-	return &collector{}
+func NewWithFlags(_ *kingpin.Application) *Collector {
+	return &Collector{}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	c.AudioBytesReceived = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "audio_bytes_received_total"),
 		"(AudioBytesReceived)",
@@ -325,7 +330,7 @@ func (c *collector) Build() error {
 
 // Collect sends the metric values for each metric
 // to the provided prometheus Metric channel.
-func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	if err := c.collectAudio(ch); err != nil {
 		_ = level.Error(c.logger).Log("msg", "failed collecting teradici session audio metrics", "err", err)
 		return err
@@ -401,7 +406,7 @@ type win32_PerfRawData_TeradiciPerf_PCoIPSessionUsbStatistics struct {
 	USBTXBWkbitPersec uint64
 }
 
-func (c *collector) collectAudio(ch chan<- prometheus.Metric) error {
+func (c *Collector) collectAudio(ch chan<- prometheus.Metric) error {
 	var dst []win32_PerfRawData_TeradiciPerf_PCoIPSessionAudioStatistics
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {
@@ -444,7 +449,7 @@ func (c *collector) collectAudio(ch chan<- prometheus.Metric) error {
 	return nil
 }
 
-func (c *collector) collectGeneral(ch chan<- prometheus.Metric) error {
+func (c *Collector) collectGeneral(ch chan<- prometheus.Metric) error {
 	var dst []win32_PerfRawData_TeradiciPerf_PCoIPSessionGeneralStatistics
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {
@@ -499,7 +504,7 @@ func (c *collector) collectGeneral(ch chan<- prometheus.Metric) error {
 	return nil
 }
 
-func (c *collector) collectImaging(ch chan<- prometheus.Metric) error {
+func (c *Collector) collectImaging(ch chan<- prometheus.Metric) error {
 	var dst []win32_PerfRawData_TeradiciPerf_PCoIPSessionImagingStatistics
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {
@@ -578,7 +583,7 @@ func (c *collector) collectImaging(ch chan<- prometheus.Metric) error {
 	return nil
 }
 
-func (c *collector) collectNetwork(ch chan<- prometheus.Metric) error {
+func (c *Collector) collectNetwork(ch chan<- prometheus.Metric) error {
 	var dst []win32_PerfRawData_TeradiciPerf_PCoIPSessionNetworkStatistics
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {
@@ -651,7 +656,7 @@ func (c *collector) collectNetwork(ch chan<- prometheus.Metric) error {
 	return nil
 }
 
-func (c *collector) collectUsb(ch chan<- prometheus.Metric) error {
+func (c *Collector) collectUsb(ch chan<- prometheus.Metric) error {
 	var dst []win32_PerfRawData_TeradiciPerf_PCoIPSessionUsbStatistics
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {

pkg/collector/terminal_services/terminal_services.go

@@ -46,11 +46,11 @@ func isConnectionBrokerServer(logger log.Logger) bool {
 	return false
 }
 
-// A collector is a Prometheus collector for WMI
+// A Collector is a Prometheus Collector for WMI
 // Win32_PerfRawData_LocalSessionManager_TerminalServices &  Win32_PerfRawData_TermService_TerminalServicesSession  metrics
 // https://docs.microsoft.com/en-us/previous-versions/aa394344(v%3Dvs.85)
 // https://wutils.com/wmi/root/cimv2/win32_perfrawdata_localsessionmanager_terminalservices/
-type collector struct {
+type Collector struct {
 	logger log.Logger
 
 	connectionBrokerEnabled bool
@@ -75,32 +75,43 @@ type collector struct {
 	WorkingSetPeak              *prometheus.Desc
 }
 
-func New(logger log.Logger, _ *Config) types.Collector {
-	c := &collector{}
+func New(logger log.Logger, _ *Config) *Collector {
+	c := &Collector{}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(_ *kingpin.Application) types.Collector {
-	return &collector{}
+func NewWithFlags(_ *kingpin.Application) *Collector {
+	return &Collector{}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{
 		"Terminal Services Session",
 		"Remote Desktop Connection Broker Counterset",
 	}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	err := wtsapi32.WTSCloseServer(c.hServer)
+
+	if err != nil {
+		return fmt.Errorf("failed to close WTS server: %w", err)
+	}
+
+	return nil
+}
+
+func (c *Collector) Build() error {
 	c.connectionBrokerEnabled = isConnectionBrokerServer(c.logger)
 
 	c.SessionInfo = prometheus.NewDesc(
@@ -206,7 +217,7 @@ func (c *collector) Build() error {
 
 // Collect sends the metric values for each metric
 // to the provided prometheus Metric channel.
-func (c *collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	if err := c.collectWTSSessions(ch); err != nil {
 		_ = level.Error(c.logger).Log("msg", "failed collecting terminal services session infos", "err", err)
 		return err
@@ -245,7 +256,7 @@ type perflibTerminalServicesSession struct {
 	WorkingSetPeak        float64 `perflib:"Working Set Peak"`
 }
 
-func (c *collector) collectTSSessionCounters(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) collectTSSessionCounters(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	dst := make([]perflibTerminalServicesSession, 0)
 	err := perflib.UnmarshalObject(ctx.PerfObjects["Terminal Services Session"], &dst, c.logger)
 	if err != nil {
@@ -368,7 +379,7 @@ type perflibRemoteDesktopConnectionBrokerCounterset struct {
 	FailedConnections     float64 `perflib:"Failed Connections"`
 }
 
-func (c *collector) collectCollectionBrokerPerformanceCounter(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) collectCollectionBrokerPerformanceCounter(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	dst := make([]perflibRemoteDesktopConnectionBrokerCounterset, 0)
 	err := perflib.UnmarshalObject(ctx.PerfObjects["Remote Desktop Connection Broker Counterset"], &dst, c.logger)
 	if err != nil {
@@ -402,7 +413,7 @@ func (c *collector) collectCollectionBrokerPerformanceCounter(ctx *types.ScrapeC
 	return nil
 }
 
-func (c *collector) collectWTSSessions(ch chan<- prometheus.Metric) error {
+func (c *Collector) collectWTSSessions(ch chan<- prometheus.Metric) error {
 	sessions, err := wtsapi32.WTSEnumerateSessionsEx(c.hServer, c.logger)
 	if err != nil {
 		return fmt.Errorf("failed to enumerate WTS sessions: %w", err)

pkg/collector/terminal_services/terminal_services_test.go

@@ -8,7 +8,5 @@ import (
 )
 
 func BenchmarkCollector(b *testing.B) {
-
 	testutils.FuncBenchmarkCollector(b, terminal_services.Name, terminal_services.NewWithFlags)
-
 }

pkg/collector/textfile/textfile.go

@@ -37,10 +37,7 @@ import (
 	"github.com/prometheus/common/expfmt"
 )
 
-const (
-	Name                    = "textfile"
-	FlagTextFileDirectories = "collector.textfile.directories"
-)
+const Name = "textfile"
 
 type Config struct {
 	TextFileDirectories string `yaml:"text_file_directories"`
@@ -50,7 +47,7 @@ var ConfigDefaults = Config{
 	TextFileDirectories: getDefaultPath(),
 }
 
-type collector struct {
+type Collector struct {
 	logger log.Logger
 
 	textFileDirectories *string
@@ -59,51 +56,56 @@ type collector struct {
 	// Only set for testing to get predictable output.
 	mtime *float64
 
-	MtimeDesc *prometheus.Desc
+	mtimeDesc *prometheus.Desc
 }
 
-func New(logger log.Logger, config *Config) types.Collector {
+func New(logger log.Logger, config *Config) *Collector {
 	if config == nil {
 		config = &ConfigDefaults
 	}
 
-	c := &collector{
+	c := &Collector{
 		textFileDirectories: &config.TextFileDirectories,
 	}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(app *kingpin.Application) types.Collector {
-	return &collector{
+func NewWithFlags(app *kingpin.Application) *Collector {
+	return &Collector{
 		textFileDirectories: app.Flag(
-			FlagTextFileDirectories,
+			"collector.textfile.directories",
 			"Directory or Directories to read text files with metrics from.",
 		).Default(ConfigDefaults.TextFileDirectories).String(),
 	}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	c.directories = ""
 	if utils.HasValue(c.textFileDirectories) {
 		c.directories = strings.Trim(*c.textFileDirectories, ",")
 	}
 
-	_ = level.Info(c.logger).Log("msg", "textfile collector directories: "+c.directories)
+	_ = level.Info(c.logger).Log("msg", "textfile Collector directories: "+c.directories)
 
-	c.MtimeDesc = prometheus.NewDesc(
+	c.mtimeDesc = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, "textfile", "mtime_seconds"),
 		"Unixtime mtime of textfiles successfully read.",
 		[]string{"file"},
@@ -138,7 +140,7 @@ func duplicateMetricEntry(metricFamilies []*dto.MetricFamily) bool {
 	return false
 }
 
-func (c *collector) convertMetricFamily(metricFamily *dto.MetricFamily, ch chan<- prometheus.Metric) {
+func (c *Collector) convertMetricFamily(metricFamily *dto.MetricFamily, ch chan<- prometheus.Metric) {
 	var valType prometheus.ValueType
 	var val float64
 
@@ -154,7 +156,7 @@ func (c *collector) convertMetricFamily(metricFamily *dto.MetricFamily, ch chan<
 
 	for _, metric := range metricFamily.Metric {
 		if metric.TimestampMs != nil {
-			_ = level.Warn(c.logger).Log("msg", fmt.Sprintf("Ignoring unsupported custom timestamp on textfile collector metric %v", metric))
+			_ = level.Warn(c.logger).Log("msg", fmt.Sprintf("Ignoring unsupported custom timestamp on textfile Collector metric %v", metric))
 		}
 
 		labels := metric.GetLabel()
@@ -240,7 +242,7 @@ func (c *collector) convertMetricFamily(metricFamily *dto.MetricFamily, ch chan<
 	}
 }
 
-func (c *collector) exportMTimes(mtimes map[string]time.Time, ch chan<- prometheus.Metric) {
+func (c *Collector) exportMTimes(mtimes map[string]time.Time, ch chan<- prometheus.Metric) {
 	// Export the mtimes of the successful files.
 	if len(mtimes) > 0 {
 		// Sorting is needed for predictable output comparison in tests.
@@ -255,7 +257,7 @@ func (c *collector) exportMTimes(mtimes map[string]time.Time, ch chan<- promethe
 			if c.mtime != nil {
 				mtime = *c.mtime
 			}
-			ch <- prometheus.MustNewConstMetric(c.MtimeDesc, prometheus.GaugeValue, mtime, filename)
+			ch <- prometheus.MustNewConstMetric(c.mtimeDesc, prometheus.GaugeValue, mtime, filename)
 		}
 	}
 }
@@ -285,7 +287,7 @@ func (cr carriageReturnFilteringReader) Read(p []byte) (int, error) {
 }
 
 // Collect implements the Collector interface.
-func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	errorMetric := 0.0
 	mtimes := map[string]time.Time{}
 	// Create empty metricFamily slice here and append parsedFamilies to it inside the loop.
@@ -326,7 +328,7 @@ func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric)
 			return nil
 		})
 		if err != nil && directory != "" {
-			_ = level.Error(c.logger).Log("msg", "Error reading textfile collector directory: "+c.directories, "err", err)
+			_ = level.Error(c.logger).Log("msg", "Error reading textfile Collector directory: "+c.directories, "err", err)
 			errorMetric = 1.0
 		}
 	}

pkg/collector/textfile/textfile_test_test.go

@@ -6,15 +6,12 @@ import (
 	"strings"
 	"testing"
 
-	"github.com/stretchr/testify/require"
-
+	"github.com/go-kit/log"
 	"github.com/prometheus-community/windows_exporter/pkg/collector"
 	"github.com/prometheus-community/windows_exporter/pkg/collector/textfile"
-	"github.com/prometheus-community/windows_exporter/pkg/types"
-
-	"github.com/go-kit/log"
 	"github.com/prometheus/client_golang/prometheus"
 	dto "github.com/prometheus/client_model/go"
+	"github.com/stretchr/testify/require"
 )
 
 var baseDir = "../../../tools/textfile-test"
@@ -27,7 +24,7 @@ func TestMultipleDirectories(t *testing.T) {
 		TextFileDirectories: testDirs,
 	})
 
-	collectors := collector.New(map[string]types.Collector{textfile.Name: textfileCollector})
+	collectors := collector.New(map[string]collector.Collector{textfile.Name: textfileCollector})
 	require.NoError(t, collectors.Build())
 
 	scrapeContext, err := collectors.PrepareScrapeContext()
@@ -66,7 +63,7 @@ func TestDuplicateFileName(t *testing.T) {
 		TextFileDirectories: testDir,
 	})
 
-	collectors := collector.New(map[string]types.Collector{textfile.Name: textfileCollector})
+	collectors := collector.New(map[string]collector.Collector{textfile.Name: textfileCollector})
 	require.NoError(t, collectors.Build())
 
 	scrapeContext, err := collectors.PrepareScrapeContext()

pkg/collector/thermalzone/thermalzone.go

@@ -19,8 +19,8 @@ type Config struct{}
 
 var ConfigDefaults = Config{}
 
-// A collector is a Prometheus collector for WMI Win32_PerfRawData_Counters_ThermalZoneInformation metrics
-type collector struct {
+// A Collector is a Prometheus Collector for WMI Win32_PerfRawData_Counters_ThermalZoneInformation metrics
+type Collector struct {
 	logger log.Logger
 
 	PercentPassiveLimit *prometheus.Desc
@@ -28,29 +28,34 @@ type collector struct {
 	ThrottleReasons     *prometheus.Desc
 }
 
-func New(logger log.Logger, _ *Config) types.Collector {
-	c := &collector{}
+func New(logger log.Logger, _ *Config) *Collector {
+	c := &Collector{}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(_ *kingpin.Application) types.Collector {
-	return &collector{}
+func NewWithFlags(_ *kingpin.Application) *Collector {
+	return &Collector{}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	c.Temperature = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "temperature_celsius"),
 		"(Temperature)",
@@ -80,7 +85,7 @@ func (c *collector) Build() error {
 
 // Collect sends the metric values for each metric
 // to the provided prometheus Metric channel.
-func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	if err := c.collect(ch); err != nil {
 		_ = level.Error(c.logger).Log("msg", "failed collecting thermalzone metrics", "err", err)
 		return err
@@ -98,7 +103,7 @@ type Win32_PerfRawData_Counters_ThermalZoneInformation struct {
 	ThrottleReasons          uint32
 }
 
-func (c *collector) collect(ch chan<- prometheus.Metric) error {
+func (c *Collector) collect(ch chan<- prometheus.Metric) error {
 	var dst []Win32_PerfRawData_Counters_ThermalZoneInformation
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {

pkg/collector/time/time.go

@@ -20,8 +20,8 @@ type Config struct{}
 
 var ConfigDefaults = Config{}
 
-// collector is a Prometheus collector for Perflib counter metrics
-type collector struct {
+// Collector is a Prometheus Collector for Perflib counter metrics
+type Collector struct {
 	logger log.Logger
 
 	ClockFrequencyAdjustmentPPBTotal *prometheus.Desc
@@ -32,29 +32,34 @@ type collector struct {
 	NTPServerOutgoingResponsesTotal  *prometheus.Desc
 }
 
-func New(logger log.Logger, _ *Config) types.Collector {
-	c := &collector{}
+func New(logger log.Logger, _ *Config) *Collector {
+	c := &Collector{}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(_ *kingpin.Application) types.Collector {
-	return &collector{}
+func NewWithFlags(_ *kingpin.Application) *Collector {
+	return &Collector{}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{"Windows Time Service"}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	if winversion.WindowsVersionFloat <= 6.1 {
 		return errors.New("Windows version older than Server 2016 detected. The time collector will not run and should be disabled via CLI flags or configuration file")
 	}
@@ -100,7 +105,7 @@ func (c *collector) Build() error {
 
 // Collect sends the metric values for each metric
 // to the provided prometheus Metric channel.
-func (c *collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	if err := c.collect(ctx, ch); err != nil {
 		_ = level.Error(c.logger).Log("msg", "failed collecting time metrics", "err", err)
 		return err
@@ -118,7 +123,7 @@ type windowsTime struct {
 	NTPServerOutgoingResponsesTotal  float64 `perflib:"NTP Server Outgoing Responses"`
 }
 
-func (c *collector) collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	var dst []windowsTime // Single-instance class, array is required but will have single entry.
 	if err := perflib.UnmarshalObject(ctx.PerfObjects["Windows Time Service"], &dst, c.logger); err != nil {
 		return err

pkg/collector/types.go

@@ -0,0 +1,34 @@
+package collector
+
+import (
+	"github.com/alecthomas/kingpin/v2"
+	"github.com/go-kit/log"
+	"github.com/prometheus-community/windows_exporter/pkg/types"
+	"github.com/prometheus/client_golang/prometheus"
+)
+
+type Collectors struct {
+	logger log.Logger
+
+	collectors       Map
+	perfCounterQuery string
+}
+
+type Map map[string]Collector
+
+type Builder func(logger log.Logger) Collector
+type BuilderWithFlags[C Collector] func(*kingpin.Application) C
+
+// Collector interface that a collector has to implement.
+type Collector interface {
+	Build() error
+	// Close closes the collector
+	Close() error
+	// GetName get the name of the collector
+	GetName() string
+	// GetPerfCounter returns the perf counter required by the collector
+	GetPerfCounter() ([]string, error)
+	// Collect Get new metrics and expose them via prometheus registry.
+	Collect(ctx *types.ScrapeContext, ch chan<- prometheus.Metric) (err error)
+	SetLogger(logger log.Logger)
+}

pkg/collector/vmware/vmware.go

@@ -20,8 +20,8 @@ type Config struct{}
 
 var ConfigDefaults = Config{}
 
-// A collector is a Prometheus collector for WMI Win32_PerfRawData_vmGuestLib_VMem/Win32_PerfRawData_vmGuestLib_VCPU metrics
-type collector struct {
+// A Collector is a Prometheus Collector for WMI Win32_PerfRawData_vmGuestLib_VMem/Win32_PerfRawData_vmGuestLib_VCPU metrics
+type Collector struct {
 	logger log.Logger
 
 	MemActive      *prometheus.Desc
@@ -46,29 +46,34 @@ type collector struct {
 	HostProcessorSpeedMHz *prometheus.Desc
 }
 
-func New(logger log.Logger, _ *Config) types.Collector {
-	c := &collector{}
+func New(logger log.Logger, _ *Config) *Collector {
+	c := &Collector{}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(_ *kingpin.Application) types.Collector {
-	return &collector{}
+func NewWithFlags(_ *kingpin.Application) *Collector {
+	return &Collector{}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	c.MemActive = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "mem_active_bytes"),
 		"(MemActiveMB)",
@@ -189,7 +194,7 @@ func (c *collector) Build() error {
 
 // Collect sends the metric values for each metric
 // to the provided prometheus Metric channel.
-func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	if err := c.collectMem(ch); err != nil {
 		_ = level.Error(c.logger).Log("msg", "failed collecting vmware memory metrics", "err", err)
 		return err
@@ -226,7 +231,7 @@ type Win32_PerfRawData_vmGuestLib_VCPU struct {
 	HostProcessorSpeedMHz uint64
 }
 
-func (c *collector) collectMem(ch chan<- prometheus.Metric) error {
+func (c *Collector) collectMem(ch chan<- prometheus.Metric) error {
 	var dst []Win32_PerfRawData_vmGuestLib_VMem
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {
@@ -315,7 +320,7 @@ func mbToBytes(mb uint64) float64 {
 	return float64(mb * 1024 * 1024)
 }
 
-func (c *collector) collectCpu(ch chan<- prometheus.Metric) error {
+func (c *Collector) collectCpu(ch chan<- prometheus.Metric) error {
 	var dst []Win32_PerfRawData_vmGuestLib_VCPU
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {

pkg/collector/vmware_blast/vmware_blast.go

@@ -31,7 +31,7 @@ var ConfigDefaults = Config{}
 // win32_PerfRawData_Counters_VMwareBlastUSBCounters
 // win32_PerfRawData_Counters_VMwareBlastWindowsMediaMMRCounters
 
-type collector struct {
+type Collector struct {
 	logger log.Logger
 
 	AudioReceivedBytes      *prometheus.Desc
@@ -116,29 +116,34 @@ type collector struct {
 	WindowsMediaMMRTransmittedPackets *prometheus.Desc
 }
 
-func New(logger log.Logger, _ *Config) types.Collector {
-	c := &collector{}
+func New(logger log.Logger, _ *Config) *Collector {
+	c := &Collector{}
 	c.SetLogger(logger)
+
 	return c
 }
 
-func NewWithFlags(_ *kingpin.Application) types.Collector {
-	return &collector{}
+func NewWithFlags(_ *kingpin.Application) *Collector {
+	return &Collector{}
 }
 
-func (c *collector) GetName() string {
+func (c *Collector) GetName() string {
 	return Name
 }
 
-func (c *collector) SetLogger(logger log.Logger) {
+func (c *Collector) SetLogger(logger log.Logger) {
 	c.logger = log.With(logger, "collector", Name)
 }
 
-func (c *collector) GetPerfCounter() ([]string, error) {
+func (c *Collector) GetPerfCounter() ([]string, error) {
 	return []string{}, nil
 }
 
-func (c *collector) Build() error {
+func (c *Collector) Close() error {
+	return nil
+}
+
+func (c *Collector) Build() error {
 	c.AudioReceivedBytes = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "audio_received_bytes_total"),
 		"(AudioReceivedBytes)",
@@ -569,7 +574,7 @@ func (c *collector) Build() error {
 
 // Collect sends the metric values for each metric
 // to the provided prometheus Metric channel.
-func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+func (c *Collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
 	if err := c.collectAudio(ch); err != nil {
 		_ = level.Error(c.logger).Log("msg", "failed collecting vmware blast audio metrics", "err", err)
 		return err
@@ -726,7 +731,7 @@ type win32_PerfRawData_Counters_VMwareBlastWindowsMediaMMRCounters struct {
 	TransmittedPackets uint32
 }
 
-func (c *collector) collectAudio(ch chan<- prometheus.Metric) error {
+func (c *Collector) collectAudio(ch chan<- prometheus.Metric) error {
 	var dst []win32_PerfRawData_Counters_VMwareBlastAudioCounters
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {
@@ -765,7 +770,7 @@ func (c *collector) collectAudio(ch chan<- prometheus.Metric) error {
 	return nil
 }
 
-func (c *collector) collectCdr(ch chan<- prometheus.Metric) error {
+func (c *Collector) collectCdr(ch chan<- prometheus.Metric) error {
 	var dst []win32_PerfRawData_Counters_VMwareBlastCDRCounters
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {
@@ -804,7 +809,7 @@ func (c *collector) collectCdr(ch chan<- prometheus.Metric) error {
 	return nil
 }
 
-func (c *collector) collectClipboard(ch chan<- prometheus.Metric) error {
+func (c *Collector) collectClipboard(ch chan<- prometheus.Metric) error {
 	var dst []win32_PerfRawData_Counters_VMwareBlastClipboardCounters
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {
@@ -843,7 +848,7 @@ func (c *collector) collectClipboard(ch chan<- prometheus.Metric) error {
 	return nil
 }
 
-func (c *collector) collectHtml5Mmr(ch chan<- prometheus.Metric) error {
+func (c *Collector) collectHtml5Mmr(ch chan<- prometheus.Metric) error {
 	var dst []win32_PerfRawData_Counters_VMwareBlastHTML5MMRcounters
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {
@@ -882,7 +887,7 @@ func (c *collector) collectHtml5Mmr(ch chan<- prometheus.Metric) error {
 	return nil
 }
 
-func (c *collector) collectImaging(ch chan<- prometheus.Metric) error {
+func (c *Collector) collectImaging(ch chan<- prometheus.Metric) error {
 	var dst []win32_PerfRawData_Counters_VMwareBlastImagingCounters
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {
@@ -969,7 +974,7 @@ func (c *collector) collectImaging(ch chan<- prometheus.Metric) error {
 	return nil
 }
 
-func (c *collector) collectRtav(ch chan<- prometheus.Metric) error {
+func (c *Collector) collectRtav(ch chan<- prometheus.Metric) error {
 	var dst []win32_PerfRawData_Counters_VMwareBlastRTAVCounters
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {
@@ -1008,7 +1013,7 @@ func (c *collector) collectRtav(ch chan<- prometheus.Metric) error {
 	return nil
 }
 
-func (c *collector) collectSerialPortandScanner(ch chan<- prometheus.Metric) error {
+func (c *Collector) collectSerialPortandScanner(ch chan<- prometheus.Metric) error {
 	var dst []win32_PerfRawData_Counters_VMwareBlastSerialPortandScannerCounters
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {
@@ -1047,7 +1052,7 @@ func (c *collector) collectSerialPortandScanner(ch chan<- prometheus.Metric) err
 	return nil
 }
 
-func (c *collector) collectSession(ch chan<- prometheus.Metric) error {
+func (c *Collector) collectSession(ch chan<- prometheus.Metric) error {
 	var dst []win32_PerfRawData_Counters_VMwareBlastSessionCounters
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {
@@ -1164,7 +1169,7 @@ func (c *collector) collectSession(ch chan<- prometheus.Metric) error {
 	return nil
 }
 
-func (c *collector) collectSkypeforBusinessControl(ch chan<- prometheus.Metric) error {
+func (c *Collector) collectSkypeforBusinessControl(ch chan<- prometheus.Metric) error {
 	var dst []win32_PerfRawData_Counters_VMwareBlastSkypeforBusinessControlCounters
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {
@@ -1203,7 +1208,7 @@ func (c *collector) collectSkypeforBusinessControl(ch chan<- prometheus.Metric)
 	return nil
 }
 
-func (c *collector) collectThinPrint(ch chan<- prometheus.Metric) error {
+func (c *Collector) collectThinPrint(ch chan<- prometheus.Metric) error {
 	var dst []win32_PerfRawData_Counters_VMwareBlastThinPrintCounters
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {
@@ -1242,7 +1247,7 @@ func (c *collector) collectThinPrint(ch chan<- prometheus.Metric) error {
 	return nil
 }
 
-func (c *collector) collectUsb(ch chan<- prometheus.Metric) error {
+func (c *Collector) collectUsb(ch chan<- prometheus.Metric) error {
 	var dst []win32_PerfRawData_Counters_VMwareBlastUSBCounters
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {
@@ -1281,7 +1286,7 @@ func (c *collector) collectUsb(ch chan<- prometheus.Metric) error {
 	return nil
 }
 
-func (c *collector) collectWindowsMediaMmr(ch chan<- prometheus.Metric) error {
+func (c *Collector) collectWindowsMediaMmr(ch chan<- prometheus.Metric) error {
 	var dst []win32_PerfRawData_Counters_VMwareBlastWindowsMediaMMRCounters
 	q := wmi.QueryAll(&dst, c.logger)
 	if err := wmi.Query(q, &dst); err != nil {

pkg/config/config.go

@@ -37,16 +37,16 @@ type Resolver struct {
 }
 
 // NewResolver returns a Resolver structure.
-func NewResolver(file string, logger log.Logger, insecure_skip_verify bool) (*Resolver, error) {
+func NewResolver(file string, logger log.Logger, insecureSkipVerify bool) (*Resolver, error) {
 	flags := map[string]string{}
 	var fileBytes []byte
 	var err error
 	if strings.HasPrefix(file, "http://") || strings.HasPrefix(file, "https://") {
 		_ = level.Info(logger).Log("msg", fmt.Sprintf("Loading configuration file from URL: %v", file))
 		tr := &http.Transport{
-			TLSClientConfig: &tls.Config{InsecureSkipVerify: insecure_skip_verify},
+			TLSClientConfig: &tls.Config{InsecureSkipVerify: insecureSkipVerify}, //nolint:gosec
 		}
-		if insecure_skip_verify {
+		if insecureSkipVerify {
 			_ = level.Warn(logger).Log("msg", "Loading configuration file with TLS verification disabled")
 		}
 		client := &http.Client{Transport: tr}

pkg/config/flatten.go

@@ -58,7 +58,9 @@ func flattenSlice(data []interface{}) map[string]string {
 func convertMap(originalMap map[interface{}]interface{}) map[string]interface{} {
 	convertedMap := map[string]interface{}{}
 	for key, value := range originalMap {
-		convertedMap[key.(string)] = value
+		if keyString, ok := key.(string); ok {
+			convertedMap[keyString] = value
+		}
 	}
 	return convertedMap
 }

pkg/headers/wtsapi32/wtsapi32.go

@@ -129,12 +129,13 @@ func WTSOpenServer(server string) (syscall.Handle, error) {
 }
 
 func WTSCloseServer(server syscall.Handle) error {
-	_, _, err := procWTSCloseServer.Call(uintptr(server))
-	if err != nil {
+	r1, _, err := procWTSCloseServer.Call(uintptr(server))
+
+	if r1 != 1 {
 		return fmt.Errorf("failed to close server: %w", err)
 	}
 
-	return err
+	return nil
 }
 
 func WTSFreeMemoryEx(class WTSTypeClass, pMemory uintptr, NumberOfEntries uint32) error {

pkg/log/eventlog/eventlog.go

@@ -6,6 +6,7 @@ package eventlog
 
 import (
 	"bytes"
+	"errors"
 	"fmt"
 	"io"
 	"sync"
@@ -54,7 +55,11 @@ type eventlogLogger struct {
 func (l *eventlogLogger) Log(keyvals ...interface{}) error {
 	priority := l.prioritySelector(keyvals...)
 
-	lb := l.getLoggerBuf()
+	lb, err := l.getLoggerBuf()
+	if err != nil {
+		return err
+	}
+
 	defer l.putLoggerBuf(lb)
 	if err := lb.logger.Log(keyvals...); err != nil {
 		return err
@@ -77,15 +82,19 @@ type loggerBuf struct {
 	logger log.Logger
 }
 
-func (l *eventlogLogger) getLoggerBuf() *loggerBuf {
-	lb := l.bufPool.Get().(*loggerBuf)
+func (l *eventlogLogger) getLoggerBuf() (*loggerBuf, error) {
+	lb, ok := l.bufPool.Get().(*loggerBuf)
+	if !ok {
+		return nil, errors.New("failed to get loggerBuf from pool")
+	}
+
 	if lb.buf == nil {
 		lb.buf = &bytes.Buffer{}
 		lb.logger = l.newLogger(lb.buf)
 	} else {
 		lb.buf.Reset()
 	}
-	return lb
+	return lb, nil
 }
 
 func (l *eventlogLogger) putLoggerBuf(lb *loggerBuf) {

pkg/testutils/testutils.go

@@ -8,14 +8,13 @@ import (
 	"github.com/alecthomas/kingpin/v2"
 	"github.com/go-kit/log"
 	"github.com/prometheus-community/windows_exporter/pkg/collector"
-	"github.com/prometheus-community/windows_exporter/pkg/types"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/stretchr/testify/require"
 )
 
-func FuncBenchmarkCollector(b *testing.B, name string, collectFunc types.CollectorBuilderWithFlags) {
+func FuncBenchmarkCollector[C collector.Collector](b *testing.B, name string, collectFunc collector.BuilderWithFlags[C]) {
 	c := collectFunc(kingpin.CommandLine)
-	collectors := collector.New(map[string]types.Collector{name: c})
+	collectors := collector.New(map[string]collector.Collector{name: c})
 	require.NoError(b, collectors.Build())
 	collectors.SetLogger(log.NewNopLogger())
 

pkg/types/types.go

@@ -1,28 +1,6 @@
-//go:build windows
-
 package types
 
-import (
-	"github.com/alecthomas/kingpin/v2"
-	"github.com/go-kit/log"
-	"github.com/prometheus-community/windows_exporter/pkg/perflib"
-	"github.com/prometheus/client_golang/prometheus"
-)
-
-type CollectorBuilder func(logger log.Logger) Collector
-type CollectorBuilderWithFlags func(*kingpin.Application) Collector
-
-// Collector is the interface a collector has to implement.
-type Collector interface {
-	Build() error
-	// GetName get the name of the collector
-	GetName() string
-	// GetPerfCounter returns the perf counter required by the collector
-	GetPerfCounter() ([]string, error)
-	// Collect Get new metrics and expose them via prometheus registry.
-	Collect(ctx *ScrapeContext, ch chan<- prometheus.Metric) (err error)
-	SetLogger(logger log.Logger)
-}
+import "github.com/prometheus-community/windows_exporter/pkg/perflib"
 
 type ScrapeContext struct {
 	PerfObjects map[string]*perflib.PerfObject

pkg/wmi/wmi.go

@@ -2,7 +2,6 @@ package wmi
 
 import (
 	"bytes"
-
 	"reflect"
 
 	"github.com/go-kit/log"

tools/end-to-end-test.ps1

@@ -41,7 +41,16 @@ for ($i=1; $i -le 5; $i++) {
     Write-Host "Waiting for exporter to start"
 }
 
-$response = Invoke-WebRequest -UseBasicParsing -URI http://127.0.0.1:9182/metrics
+try {
+    $response = Invoke-WebRequest -UseBasicParsing -URI http://127.0.0.1:9182/metrics
+} catch {
+    Write-Host "STDOUT"
+    Get-Content "$($temp_dir)/windows_exporter.log"
+    Write-Host "STDERR"
+    Get-Content "$($temp_dir)/windows_exporter_error.log"
+
+    throw $_
+}
 # Response output must be split and saved as UTF-8.
 $response.content -split "[`r`n]"| Select-String -NotMatch $skip_re | Set-Content -Encoding utf8 "$($temp_dir)/e2e-output.txt"
 Stop-Process -Id $exporter_proc.Id