event.go

package main

import "fmt"

type Signal string

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

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

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