Stackable actor traits See http://www.slideshare.net/EvanChan2/akka-inproductionpnw-scala2013 for more examples

gistfile1.scala

trait ActorStack extends Actor {
  /** Actor classes should implement this partialFunction for standard
   *  actor message handling
   */
  def wrappedReceive: Receive

  /** Stackable traits should override and call super.receive(x) for
   *  stacking functionality
   */
  def receive: Receive = {
    case x => if (wrappedReceive.isDefinedAt(x)) wrappedReceive(x) else unhandled(x)
  } 
}

trait Instrument1 extends ActorStack {
  override def receive: Receive = {
    case x =>
      println("Do something before...") 
      super.receive(x)
      println("Do something after...")
  } 
}

class DummyActor extends Actor with Instrument1 with Instrument2 {
  def wrappedReceive = {
    case "something" => println("Got something")
    case x => println("Got something else: " + x) 
  }
}

trait Slf4jLogging extends Actor with ActorStack {
  val logger = LoggerFactory.getLogger(getClass) 
  private[this] val myPath = self.path.toString
  logger.info("Starting actor " + getClass.getName)
  
  override def receive: Receive = { 
    case x =>
      org.slf4j.MDC.put("akkaSource", myPath)
      super.receive(x) 
  }
}