golang等待触发事件的实例

我就废话不多说了，大家还是直接看代码吧~

type Wait interface {
 // Register waits returns a chan that waits on the given ID.
 // The chan will be triggered when Trigger is called with
 // the same ID.
 Register(id uint64) <-chan interface{}
 // Trigger triggers the waiting chans with the given ID.
 Trigger(id uint64, x interface{})
 IsRegistered(id uint64) bool
}

type list struct {
 l sync.RWMutex
 m map[uint64]chan interface{}
}

func Newlist() Wait {
 return &list{m : make(map[uint64]chan interface{})}
}

//注册
func (w *list) Register(id uint64) <-chan interface{} {
 w.l.Lock()
 defer w.l.Unlock()
 ch := w.m[id]
 if ch != nil {
  log.Fatal("dup id error")
  return nil
 }
 ch = make(chan interface{},1)
 w.m[id] = ch
 return ch
}

//触发
func (w *list) Trigger(id uint64, x interface{}) {
 w.l.Lock()
 ch := w.m[id]
 delete(w.m,id)
 w.l.Unlock()
 if ch != nil {
  ch <- x
  close(ch)
 }
}

//判断该id是否被注册
func (w *list) IsRegistered(id uint64) bool {
 w.l.RLock()
 defer w.l.Unlock()
 _,ok := w.m[id]
 return ok
}

示例

var timeOutDuration = time.Minute*10
func main() {
    list := Newlist()
    rid := uint64(time.Now().UnixNano())
    go func() {
        ch := list.Register(rid)
        fmt.Println("start register:",rid)
        if ch == nil {
            return
        }
        select {
        case x := <- ch:
            fmt.Printf("trigger over id:%d,x:%v\n",rid,x)
        case <-time.After(timeOutDuration):
            log.Println("timeout error:",rid)
        }
    }()
    time.Sleep(time.Second)

    rid2 := uint64(time.Now().UnixNano())
    go func() {
        ch := list.Register(rid2)
        fmt.Println("start register:",rid2)
        if ch == nil {
            return
        }
        select {
        case x := <- ch:
            fmt.Printf("trigger over id:%d,x:%v\n",rid2,x)
        case <-time.After(timeOutDuration):
            log.Println("timeout error:",rid2)
        }
    }()

    go func() {
        time.Sleep(time.Second*5)
        list.Trigger(rid,"Hello")
        time.Sleep(time.Second*3)
        list.Trigger(rid2,"World")
    }()

    select {

    }
}

补充：GO 程序等待一段时间执行

我就废话不多说了，大家还是直接看代码吧~

package main
import (
 "fmt"
 "time"
)

func main() {
 fmt.Println(time.Now())

 //等1秒
 time.Sleep(time.Second * 1)
 fmt.Println(time.Now())

 //等1秒
 <-time.After(time.Second * 1)
 fmt.Println(time.Now())
}

以上为个人经验，希望能给大家一个参考，也希望大家多多支持服务器之家。如有错误或未考虑完全的地方，望不吝赐教。

原文链接：https://skaygo.blog.csdn.net/article/details/81842163