event.go

package main

import "fmt"

type Object string

type Message string

func eventLoop(addEvent chan Object, echoEvent chan Message, quitEvent chan bool) {
	for {
		select {
		case obj := <-addEvent:
			fmt.Printf("add %v", obj)
		case msg := <-echoEvent:
			fmt.Printf("echo %s", msg)
		case <-quitEvent:
			break
		}
	}
}

func main() {
	add, echo, quit := make(chan Object), make(chan Message), make(chan bool)

	go eventLoop(add, echo, quit)

	var command int
	var obj string
	var message string
	for {
		fmt.Scanf("%d", &command)
		switch command {
		case 1:
			fmt.Scanf("%s", &obj)
			add <- Object(obj)
		case 2:
			fmt.Scanf("%s", &message)
			echo <- Message(message)
		case 3:
			quit <- true
			return
		}
	}
}