class RunningActors extends Actor with ActorLogging {

 def receive = {
    case "start" =>
      log.info("Current Actors in system:")
      self ! ActorPath.fromString("akka://Streams/user/")

    case path: ActorPath =>
      context.actorSelection(path / "*") ! Identify(())

    case ActorIdentity(_, Some(ref)) =>
      log.info(ref.toString())
      self ! ref.path
  }
}