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

import scala.concurrent.Future
import scala.concurrent.ExecutionContext.Implicits.global

case class StartFuture()
case class SpamMessage()

class TestActor extends Actor {
  private var element = 3
  def receive = {
    case StartFuture() => {
      Future {
        Thread.sleep(2000)
      }.onSuccess {
        case _ => {
          element = 12
          println(element)
        }
      }
    }
    case SpamMessage() => {
      println(element)
    }
  }
}

object TryAkka {
  def main(args: Array[String]) {
    val system = ActorSystem("System")
    val mainActor = system.actorOf(Props[TestActor], "MainActor")
    mainActor ! StartFuture()
    while (true) {
      Thread.sleep(100)
      mainActor ! SpamMessage()
    }
  }
}