You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
48 lines
942 B
Go
48 lines
942 B
Go
package executors
|
|
|
|
import (
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/zeromicro/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()
|
|
})
|
|
}
|