52 lines
854 B
Go
52 lines
854 B
Go
package main
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import (
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"fmt"
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"math/rand"
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"time"
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)
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// select
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// 有两个服务都产生数据
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// 有产生数据，就做处理
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// 谁有数据就处理谁
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// 不要用将两个channel里的数据写到新的channel里，然后再读这个channel
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func main() {
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m1, m2 := genMsg("service1"), genMsg("service2")
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m := useSelect(m1, m2)
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for {
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fmt.Println(<-m)
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}
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}
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func genMsg(name string) chan string {
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c := make(chan string)
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go func() {
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i := 0
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for {
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time.Sleep(time.Duration(rand.Intn(2000)) * time.Millisecond)
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c <- fmt.Sprintf("the service name is %v,the message is %v", name, i)
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i++
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}
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}()
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return c
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}
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// 使用select监控channel
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func useSelect(c1, c2 chan string) chan string {
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c := make(chan string)
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go func() {
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for {
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select {
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case m := <-c1:
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c <- m
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case m := <-c2:
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c <- m
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}
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}
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}()
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return c
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}
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