receive in scala

  def receive = {

    case sp: SavePhoto =>
      saveBuffer ! sp.withReplyTo(context.actorSelection(sender().path) :: sp.replyTo)

    case rp: RemovePhotos if !rp.filter.isEmpty =>
      RemovePhotosStream(rp)
        .runWith(Sink.ignore)
        .failed
        .foreach(e => log.error(e, "failed to remove photos"))
  }