Client/Server with remote actors...

ClientServer.scala

/*
 * This is an attempt to keep references to client actors on a remote actor to push events out to them as appropriate.
 * Note that, as per the comment in the client actor, the console output shows up on the server console not the client(s)
 * console(s).
 *
 */
package com.kyrlach.scratch

import akka.actor.{Actor,ActorRef}
import akka.actor.Actor._

case class Send(s:String)
case class Rec(s:String)

class ServerActor extends Actor {
  var clients:Set[ActorRef] = Set()
  def receive = {
    case "login" => clients = clients + self.sender.get
    case Send(s:String) => {
      clients foreach { c => c ! Rec(s) }
    }
  }
}

class ClientActor extends Actor {
  Actor.remote.start("localhost",2553)    //Not sure this needs to be here...
  def receive = {
    case "login" => Client.server ! "login"
    case s:Send => Client.server ! s
    case Rec(s:String) => println(s)      //This output appears in the server console!!!!
                                          //If you comment out the Actor.remote.start line above.
  }
}

object Server {
  def run = {
    Actor.remote.start("localhost",2552)
    Actor.remote.register("server", actorOf[ServerActor])
  }
  def main(args:Array[String]):Unit = run
}

object Client {
  val actor = remote.actorFor("server", "localhost", 2552)
  def server = actor
  def main(args:Array[String]):Unit = {
    val c1 = actorOf[ClientActor].start
    val c2 = actorOf[ClientActor].start
    c1 ! "login"
    c2 ! "login"
    c1 ! Send("Hi")
    c2 ! Send("How are you?")
  }
}