scala.actors.ReactorCanReply.scala Maven / Gradle / Ivy
/* __ *\
** ________ ___ / / ___ Scala API **
** / __/ __// _ | / / / _ | (c) 2005-2013, LAMP/EPFL **
** __\ \/ /__/ __ |/ /__/ __ | http://scala-lang.org/ **
** /____/\___/_/ |_/____/_/ | | **
** |/ **
\* */
package scala.actors
/**
* Provides message send operations that
* may result in a response from the receiver.
*
* @author Philipp Haller
*/
private[actors] trait ReactorCanReply extends CanReply[Any, Any] {
_: InternalReplyReactor =>
type Future[+P] = scala.actors.Future[P]
def !?(msg: Any): Any =
(this !! msg)()
def !?(msec: Long, msg: Any): Option[Any] = {
val myself = Actor.rawSelf(this.scheduler)
val res = new scala.concurrent.SyncVar[Any]
val out = new OutputChannel[Any] {
def !(msg: Any) =
res set msg
def send(msg: Any, replyTo: OutputChannel[Any]) =
res set msg
def forward(msg: Any) =
res set msg
def receiver =
myself.asInstanceOf[Actor]
}
this.send(msg, out)
res.get(msec)
}
def !!(msg: Any): Future[Any] =
this !! (msg, { case x => x })
def !![A](msg: Any, handler: PartialFunction[Any, A]): Future[A] = {
val myself = Actor.rawSelf(this.scheduler)
val ftch = new ReactChannel[A](myself)
val res = new scala.concurrent.SyncVar[A]
val out = new OutputChannel[Any] {
def !(msg: Any) = {
val msg1 = handler(msg)
ftch ! msg1
res set msg1
}
def send(msg: Any, replyTo: OutputChannel[Any]) = {
val msg1 = handler(msg)
ftch.send(msg1, replyTo)
res set msg1
}
def forward(msg: Any) = {
val msg1 = handler(msg)
ftch forward msg1
res set msg1
}
def receiver =
myself.asInstanceOf[Actor]
}
this.send(msg, out)
new Future[A] {
def apply() = {
if (!isSet)
fvalue = Some(res.get)
fvalueTyped
}
def respond(k: A => Unit): Unit =
if (isSet) k(fvalueTyped)
else inputChannel.react {
case any => fvalue = Some(any); k(fvalueTyped)
}
def isSet =
!fvalue.isEmpty
def inputChannel = ftch
}
}
}