package main

import (
	"fmt"
	"math/rand"
	"os"
	"os/signal"
	"time"
)

// 两个服务一直产生数据
// 希望有数据产生就拿这些数据做一些处理

// 切换着打印，从1到2
func main() {
	m1, m2 := genMsg("service1"), genMsg("service2")
	quit := make(chan os.Signal, 1)
	go func() {
		for {
			fmt.Println(<-m1)
			fmt.Println(<-m2)
		}
	}()
	signal.Notify(quit, os.Interrupt)
	<-quit
}

func genMsg(name string) <-chan string {
	c := make(chan string)
	go func() {
		i := 0
		for {
			time.Sleep(time.Duration(rand.Intn(2000)) * time.Millisecond)
			c <- fmt.Sprintf("the service name is %v,the message is %v",
				name, i)
			i++
		}
	}()
	return c
}