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48 lines
941 B
Go
48 lines
941 B
Go
package executors
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import (
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"sync"
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"time"
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"github.com/tal-tech/go-zero/core/threading"
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)
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// A DelayExecutor delays a tasks on given delay interval.
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type DelayExecutor struct {
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fn func()
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delay time.Duration
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triggered bool
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lock sync.Mutex
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}
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// NewDelayExecutor returns a DelayExecutor with given fn and delay.
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func NewDelayExecutor(fn func(), delay time.Duration) *DelayExecutor {
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return &DelayExecutor{
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fn: fn,
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delay: delay,
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}
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}
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// Trigger triggers the task to be executed after given delay, safe to trigger more than once.
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func (de *DelayExecutor) Trigger() {
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de.lock.Lock()
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defer de.lock.Unlock()
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if de.triggered {
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return
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}
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de.triggered = true
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threading.GoSafe(func() {
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timer := time.NewTimer(de.delay)
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defer timer.Stop()
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<-timer.C
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// set triggered to false before calling fn to ensure no triggers are missed.
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de.lock.Lock()
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de.triggered = false
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de.lock.Unlock()
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de.fn()
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})
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}
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