scala.actors.ActorCanReply.scala Maven / Gradle / Ivy
/* __ *\
** ________ ___ / / ___ Scala API **
** / __/ __// _ | / / / _ | (c) 2005-2013, LAMP/EPFL **
** __\ \/ /__/ __ |/ /__/ __ | http://scala-lang.org/ **
** /____/\___/_/ |_/____/_/ | | **
** |/ **
\* */
package scala.actors
import scala.concurrent.SyncVar
/**
* Provides message send operations that
* may result in a response from the receiver.
*
* @author Philipp Haller
*/
private[actors] trait ActorCanReply extends ReactorCanReply {
this: AbstractActor with InternalReplyReactor =>
override def !?(msg: Any): Any = {
val replyCh = new Channel[Any](Actor.self(scheduler))
send(msg, replyCh)
replyCh.?
}
override def !?(msec: Long, msg: Any): Option[Any] = {
val replyCh = new Channel[Any](Actor.self(scheduler))
send(msg, replyCh)
replyCh.receiveWithin(msec) {
case TIMEOUT => None
case x => Some(x)
}
}
override def !![A](msg: Any, handler: PartialFunction[Any, A]): Future[A] = {
val c = new Channel[A](Actor.self(scheduler))
val fun = (res: SyncVar[A]) => {
val ftch = new Channel[A](Actor.self(scheduler))
send(msg, new OutputChannel[Any] {
def !(msg: Any) =
ftch ! handler(msg)
def send(msg: Any, replyTo: OutputChannel[Any]) =
ftch.send(handler(msg), replyTo)
def forward(msg: Any) =
ftch.forward(handler(msg))
def receiver =
ftch.receiver
})
ftch.react {
case any => res.set(any)
}
}
val a = new FutureActor[A](fun, c)
a.start()
a
}
override def !!(msg: Any): Future[Any] = {
val noTransform: PartialFunction[Any, Any] = { case x => x }
this !! (msg, noTransform)
}
}