PingPong actors in go

actors.go

package main

import "fmt"

type Envelope struct {
	message string
	sender  Actor
}

type Actor interface {
	Id() int
	Send(msg string, sender Actor)
	Recieve()
}

type PingPongActor struct {
	id      int
	mailbox chan Envelope
}

func (a *PingPongActor) Id() int {
	return a.id
}

func (a *PingPongActor) Send(msg string, sender Actor) {
	a.mailbox <- Envelope{msg, sender}
}

func (a *PingPongActor) Recieve() {
	for {
		select {
		case env := <-a.mailbox:
			fmt.Printf("* Actor %v recieved: %v from %v\n", a.id, env.message, env.sender.Id())
			switch env.message {
			case "Ping":
				env.sender.Send("Pong", a)
			case "Pong":
			}
		}
	}
}

func spawn(id int) Actor {
	channel := make(chan Envelope)
	a := PingPongActor{id, channel}
	go a.Recieve()
	return &a
}

func main() {
	actors := make([]Actor, 2, 2)
	actors[0] = spawn(0)
	actors[1] = spawn(1)

	actors[0].Send("Ping", actors[1])
}