Typed actor concept

gistfile1.scala

class IntStringActor extends TypedActor[Int,String] {
  private var state: Int = 0
  override def work(msg: Int): String = state.toString

  override def respondWith(msg: String)(sender: Sender): Unit = sender ! msg

  override def receiveMessage(msg: Int): Unit =
    state = state + msg
}

trait TypedActor[+In, +Out] extends Actor with TakesInput[In] with ProducesOutput[Out] with Maps[In,Out] {
  def receive: Receive = {
    case msg: In => receiveMessage(msg)
      respondWith(work(msg))(sender())
  }
}

trait Maps[-A,+B] {
  def work(msg: A): B
}

trait TakesInput[-A]  {
  def receiveMessage(msg: A)
}

trait ProducesOutput[-B] {
  def respondWith(msg: B)(sender: Sender)
}