Go 条件超时
我有一些代码,有3个计时器Go 条件超时,go,timer,channel,Go,Timer,Channel,我有一些代码,有3个计时器 GracefulExecutionTimeout-总运行时间 WaitTimeout—初始等待第一条消息的时间 IdleTimeout—等待后续消息的时间 如果达到任何计时器,应用程序应完全退出。我让它在下面工作 msgs := make(chan string) go func() { time.Sleep(time.Second) msgs <- "test" }() // graceful max execution time gra
- GracefulExecutionTimeout-总运行时间
- WaitTimeout—初始等待第一条消息的时间
- IdleTimeout—等待后续消息的时间
msgs := make(chan string)
go func() {
time.Sleep(time.Second)
msgs <- "test"
}()
// graceful max execution time
gracefulMaxTimeout := time.Second * time.Duration(10)
gracefulMaxTimer := time.NewTimer(gracefulMaxTimeout)
// idleTimeout
idleTimeout := time.Second * time.Duration(5)
idleTimer := time.NewTimer(idleTimeout)
// waitTimeout
waitTimeout := time.Second * time.Duration(2)
waitTimer := time.NewTimer(waitTimeout)
for {
select {
case <-gracefulMaxTimer.C:
fmt.Println("GracefulMaxExecutionTimeout Reached")
// graceful exit
os.Exit(0)
case <-idleTimer.C:
fmt.Println("IdleTimeout Reached")
// graceful exit
os.Exit(0)
case <-waitTimer.C:
fmt.Println("WaitTimeout Reached")
// graceful exit
os.Exit(0)
case msg := <-msgs:
// stop wait timer
waitTimer.Stop()
fmt.Println(msg)
// Reset idle timer
if !idleTimer.Stop() {
<-idleTimer.C
}
fmt.Println("IdleIimeout Reset")
idleTimer.Reset(idleTimeout)
}
}
msgs:=make(chan字符串)
go func(){
时间。睡眠(时间。秒)
msgs您可以在if
语句之外声明等待计时器及其通道,并且仅在需要等待计时器时对其进行初始化。否则,通道可能会保持其零值,即nil
,因为从nil
通道接收将永远阻塞,因此此情况将永远不会就绪(有关详细信息,请参阅)
请在上试用。可以解释为什么使用waitTimer*time.Timer
而不是waitTimer.Timer
?新到GoBecausetime.NewTimer()
返回类型为*time.Timer>的值,一个指针,而不是time.Timer
。确定-因此类型匹配。谢谢
useWaitTimer := true
var (
waitTimer *time.Timer
waitTimerC <-chan time.Time
)
if useWaitTimer {
waitTimeout := time.Millisecond * time.Duration(500)
waitTimer = time.NewTimer(waitTimeout)
waitTimerC = waitTimer.C
}
// ...
for {
select {
// ...
case <-waitTimerC:
fmt.Println("WaitTimeout Reached")
// graceful exit
os.Exit(0)
// ...
}
}
// stop wait timer if exists
if waitTimer != nil && !waitTimer.Stop() {
<-waitTimerC
}