Quicksort using Akka actors

import akka.actor.{ActorSystem, Props, Actor, Inbox}
import akka.pattern.{ask, pipe}
import akka.util.Timeout
import scala.concurrent.duration._
import scala.concurrent._

import scala.concurrent.ExecutionContext.Implicits.global


// import scala.concurrent.duration._

case class QSTask(data: Vector[Int])

class QuicksortActor extends Actor {
  val qsAct = context.self
  implicit val timeout = Timeout(5.seconds)

  def receive = {
    case QSTask(Vector()) => sender ! Vector()
    case QSTask(Vector(x)) => sender ! Vector(x)
    case QSTask(d +: ds) => {
      val (la, lb) = ds partition (_ < d)
      val fsort = Future.sequence(
        List(qsAct ? QSTask(la), qsAct ? QSTask(lb))
      ).mapTo[List[Vector[Int]]]
      fsort map { case List(sa, sb) => sa ++: d +: sb } pipeTo sender
    }
  }
}


object FiboAkkaMain extends App {
  val system = ActorSystem("helloakka")
  val qsAct = system.actorOf(Props[QuicksortActor], "qsAct")
  val inbox = Inbox.create(system)
  inbox.send(qsAct, QSTask(Vector(45, 23, 72, 35, 19, 66, 23, 65, 34, 17, 82, 81, 49, 21, 62)))
  println(inbox.receive(5.seconds))
}
// output:
// Vector(17, 19, 21, 23, 23, 34, 35, 45, 49, 62, 65, 66, 72, 81, 82)