forked from zeromicro/go-zero
-
Notifications
You must be signed in to change notification settings - Fork 0
/
delayexecutor.go
47 lines (39 loc) · 941 Bytes
/
delayexecutor.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
package executors
import (
"sync"
"time"
"github.com/tal-tech/go-zero/core/threading"
)
// A DelayExecutor delays a tasks on given delay interval.
type DelayExecutor struct {
fn func()
delay time.Duration
triggered bool
lock sync.Mutex
}
// NewDelayExecutor returns a DelayExecutor with given fn and delay.
func NewDelayExecutor(fn func(), delay time.Duration) *DelayExecutor {
return &DelayExecutor{
fn: fn,
delay: delay,
}
}
// Trigger triggers the task to be executed after given delay, safe to trigger more than once.
func (de *DelayExecutor) Trigger() {
de.lock.Lock()
defer de.lock.Unlock()
if de.triggered {
return
}
de.triggered = true
threading.GoSafe(func() {
timer := time.NewTimer(de.delay)
defer timer.Stop()
<-timer.C
// set triggered to false before calling fn to ensure no triggers are missed.
de.lock.Lock()
de.triggered = false
de.lock.Unlock()
de.fn()
})
}