Gracefully terminating a Scala program after using Actor.self
object EchoActor extends DaemonActor {
  def act() {
    loop {
      react {
        case (x: Any, respondTo: Actor) => {
          println("echoActor Got message " + x)
          respondTo ! "Echoing: " + x
        }
        case msg => println("Can't handle message " + msg)
      }
    }
  }
}

object TestRunner extends App {
  EchoActor.start()
  for (n <- 1 to 3) {
    EchoActor !("Time to echo", self)
    println(self.receiveWithin(1000) { case x => x})
    Actor.clearSelf()   //   <<-- This doesn't allow for graceful shutdown
  }
  Actor.resetProxy()    //   <<-- Neither does this
  println("Done.")
}

scala.actorsScheduler.shutdown()