Simple ejemplo de uso de Akka (Scala) basado en código de http://akka.io/

gistfile1.scala

import akka.actor.{Terminated, Props, ActorLogging, Actor, ActorSystem}

case class Greeting(who: String)

case class WAT()

case class HastaLaVista()

class AdiosActor extends Actor with ActorLogging {
  def receive = {
    case HastaLaVista() ⇒ log.info("Hasta la vista")
  }
}

class GreetingActor extends Actor with ActorLogging {
  val despedidas = context.actorOf(Props[AdiosActor], name = "despedidas")
  context.watch(despedidas)

  def receive = {
    case Greeting(who) ⇒ log.info("Hello " + who)
    case WAT() ⇒ log.info("WAT?")
    case HastaLaVista() ⇒ despedidas ! HastaLaVista()
    case Terminated(`despedidas`) => log.info("FIN")

  }
}

object blah {

  def main(args: Array[String]) {
    val system = ActorSystem("MySystem")
    val greeter = system.actorOf(Props[GreetingActor], name = "greeter")

    greeter ! Greeting("Charlie Parker 1")
    greeter ! Greeting("Charlie Parker 2")
    greeter ! WAT()
    greeter ! HastaLaVista()
  }
}