mirror of
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121 lines
2.5 KiB
Go
121 lines
2.5 KiB
Go
/*
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* Minio Client (C) 2014, 2015 Minio, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package main
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import (
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"fmt"
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"io"
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"sync"
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"sync/atomic"
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"time"
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"github.com/minio/pb"
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)
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type accountingReader struct {
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io.ReadCloser
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acct *accounter
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}
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type accounter struct {
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current int64
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Total int64
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startTime time.Time
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startValue int64
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refreshRate time.Duration
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currentValue int64
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finishOnce sync.Once
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isFinished chan struct{}
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}
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// Instantiate a new accounter
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func newAccounter(total int64) *accounter {
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acct := &accounter{
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Total: total,
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startTime: time.Now(),
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startValue: 0,
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refreshRate: time.Millisecond * 200,
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isFinished: make(chan struct{}),
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currentValue: -1,
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}
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go acct.writer()
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return acct
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}
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func (a *accounter) write(current int64) string {
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var speedBox string
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fromStart := time.Now().Sub(a.startTime)
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currentFromStart := current - a.startValue
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if currentFromStart > 0 {
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speed := float64(currentFromStart) / (float64(fromStart) / float64(time.Second))
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speedBox = pb.FormatBytes(int64(speed))
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}
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if speedBox == "" {
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speedBox = "0 MB"
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}
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return speedBox + "/s"
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}
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func (a *accounter) writer() {
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a.Update()
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for {
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select {
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case <-a.isFinished:
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return
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case <-time.After(a.refreshRate):
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a.Update()
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}
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}
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}
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func (a *accounter) Finish() string {
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var message string
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a.finishOnce.Do(func() {
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close(a.isFinished)
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message = fmt.Sprintf("Total: %s, Transferred: %s, Speed: %s", pb.FormatBytes(a.Total),
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pb.FormatBytes(a.current), a.write(atomic.LoadInt64(&a.current)))
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})
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return message
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}
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func (a *accounter) Update() {
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c := atomic.LoadInt64(&a.current)
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if c != a.currentValue {
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a.write(c)
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a.currentValue = c
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}
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}
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func (a *accounter) Add(n int64) int64 {
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return atomic.AddInt64(&a.current, n)
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}
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func (a *accounter) NewProxyReader(r io.ReadCloser) *accountingReader {
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return &accountingReader{r, a}
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}
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func (a *accountingReader) Read(p []byte) (n int, err error) {
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n, err = a.ReadCloser.Read(p)
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if err != nil {
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return
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}
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a.acct.Add(int64(n))
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return
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}
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