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feature: add support for set keepttl (#1499)

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* feature: add support for set keepttl
This commit is contained in:
x1nchen
2020-09-18 19:49:12 +08:00
committed by GitHub
parent bae2f9cc64
commit 10e779f856
3 changed files with 78 additions and 4 deletions
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26
commands.go
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@ -9,6 +9,10 @@ import (
"github.com/go-redis/redis/v8/internal"
)
// KeepTTL used when set with keepttl option
// Example: Set(ctx, key, value, redis.KeepTTL).
const KeepTTL = -1
func usePrecise(dur time.Duration) bool {
return dur < time.Second || dur%time.Second != 0
}
@ -756,6 +760,7 @@ func (c cmdable) MSetNX(ctx context.Context, values ...interface{}) *BoolCmd {
//
// Use expiration for `SETEX`-like behavior.
// Zero expiration means the key has no expiration time.
// KeepTTL(-1) expiration means command set adds keepttl option.
func (c cmdable) Set(ctx context.Context, key string, value interface{}, expiration time.Duration) *StatusCmd {
args := make([]interface{}, 3, 5)
args[0] = "set"
@ -767,7 +772,10 @@ func (c cmdable) Set(ctx context.Context, key string, value interface{}, expirat
} else {
args = append(args, "ex", formatSec(ctx, expiration))
}
} else if expiration == KeepTTL {
args = append(args, "keepttl")
}
cmd := NewStatusCmd(ctx, args...)
_ = c(ctx, cmd)
return cmd
@ -776,18 +784,23 @@ func (c cmdable) Set(ctx context.Context, key string, value interface{}, expirat
// Redis `SET key value [expiration] NX` command.
//
// Zero expiration means the key has no expiration time.
// KeepTTL(-1) expiration means set command adds keepttl option.
func (c cmdable) SetNX(ctx context.Context, key string, value interface{}, expiration time.Duration) *BoolCmd {
var cmd *BoolCmd
if expiration == 0 {
switch {
case expiration == 0:
// Use old `SETNX` to support old Redis versions.
cmd = NewBoolCmd(ctx, "setnx", key, value)
} else {
case expiration == KeepTTL:
cmd = NewBoolCmd(ctx, "set", key, value, "keepttl", "nx")
default:
if usePrecise(expiration) {
cmd = NewBoolCmd(ctx, "set", key, value, "px", formatMs(ctx, expiration), "nx")
} else {
cmd = NewBoolCmd(ctx, "set", key, value, "ex", formatSec(ctx, expiration), "nx")
}
}
_ = c(ctx, cmd)
return cmd
}
@ -795,17 +808,22 @@ func (c cmdable) SetNX(ctx context.Context, key string, value interface{}, expir
// Redis `SET key value [expiration] XX` command.
//
// Zero expiration means the key has no expiration time.
// KeepTTL(-1) expiration means set command adds keepttl option.
func (c cmdable) SetXX(ctx context.Context, key string, value interface{}, expiration time.Duration) *BoolCmd {
var cmd *BoolCmd
if expiration == 0 {
switch {
case expiration == 0:
cmd = NewBoolCmd(ctx, "set", key, value, "xx")
} else {
case expiration == KeepTTL:
cmd = NewBoolCmd(ctx, "set", key, value, "keepttl", "xx")
default:
if usePrecise(expiration) {
cmd = NewBoolCmd(ctx, "set", key, value, "px", formatMs(ctx, expiration), "xx")
} else {
cmd = NewBoolCmd(ctx, "set", key, value, "ex", formatSec(ctx, expiration), "xx")
}
}
_ = c(ctx, cmd)
return cmd
}