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Timer Goroutine can be used to perform delayed operations in Go. Create a timer via time.NewTimer() whose C channel receives a signal to indicate the end of the delay. Timers can be stopped with timer.Stop(). The following practical case demonstrates how to use a timer Goroutine to simulate a network request and return a response or timeout after 5 seconds.
How to use timer Goroutine to perform delay operations
In Go, timer Goroutine can be used to easily implement delay operate. Timer Goroutines provide a non-blocking way to delay program execution.
Using timer Goroutine
To use timer Goroutine, you need to call time.NewTimer()
. This function returns a timer type containing a C
channel that receives a signal to indicate that the requested delay has elapsed:
package main import ( "fmt" "time" ) func main() { // 创建一个持续 5 秒的计时器 timer := time.NewTimer(5 * time.Second) // 监听计时器 C 通道中的信号 <-timer.C fmt.Println("5 秒已过") }
Stop timer
If desired, you can stop the timer before it expires. Call the timer.Stop()
method to cancel the timer:
timer.Stop()
Practical case
The following is a practical example of using timer Goroutine to simulate network requests Case:
package main import ( "fmt" "net/http" "time" ) func main() { // 模拟发送网络请求 request := func() (resp *http.Response, err error) { // 假装向网络发送请求并等待 5 秒 timer := time.NewTimer(5 * time.Second) defer timer.Stop() select { case <-timer.C: resp = &http.Response{} } return resp, nil } // 使用计时器 Goroutine发送请求 resp, err := request() if err != nil { fmt.Println(err) return } fmt.Println(resp) }
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