scala-actors-rock-paper-scissor.scala

import scala.actors.Actor
import scala.actors.Actor._
import scala.util.Random.shuffle

case class Start(player1: Actor, player2: Actor)
case object Stop

case class Play(coordinator: Actor)
case class Throw(player: Actor, move: String)

class Player(val id: Int) extends Actor {
  val moves = List("Rock", "Paper", "Scissor")

  def act() {
    loop {
      react {
        case Play(c) => {
          c ! Throw(self, shuffle(moves).head)
          exit
        }
      }
    }
  }

  override def toString = id.toString
}

class Coordinator extends Actor {
  def act() {
    loop {
      react {
        case Start(p1, p2) => {
          p1 ! Play(self)
          p2 ! Play(self)
        }
        case Stop => {
          println("Game over")
          exit
        }
        case Throw(pa, ma) => {
          println("Player %s threw %s".format(pa, ma))
          react {
            case Throw(pb, mb) => {
              println("Player %s threw %s".format(pb, mb))
              self ! Stop
            }
          }
        }
      }
    }
  }
}

object RPSTest extends App {
  val c = new Coordinator()
  val p1 = new Player(1)
  val p2 = new Player(2)
  p1.start
  p2.start
  c.start
  c ! Start(p1, p2)
}