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added forward method to Actor, which forwards the message and maintains the original sender

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This commit is contained in:
Jonas Bonér 2009-12-11 06:11:37 +01:00
parent 2af6adcfa0
commit 94277df2fd
1 changed files with 13 additions and 0 deletions
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13
akka-actors/src/main/scala/actor/Actor.scala
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@ -535,6 +535,17 @@ trait Actor extends TransactionManagement {
def !?[T](message: Any): T = throw new UnsupportedOperationException(
"'!?' is evil and has been removed. Use '!!' with a timeout instead")
/**
* Forwards the message and passes the original sender actor as the sender.
*/
def forward(message: Any)(implicit sender: AnyRef) = {
val forwarder = if (sender != null && sender.isInstanceOf[Actor]) sender.asInstanceOf[Actor]
else throw new IllegalStateException("Can't forward message when the forwarder/mediator is not an actor")
if (forwarder.getSender.isEmpty) throw new IllegalStateException("Can't forward message when initial sender is not an actor")
if (_isRunning) postMessageToMailbox(message, forwarder.getSender)
else throw new IllegalStateException("Actor has not been started, you need to invoke 'actor.start' before using it")
}
/**
* Use <code>reply(..)</code> to reply with a message to the original sender of the message currently
* being processed.
@ -727,6 +738,8 @@ trait Actor extends TransactionManagement {
// ==== INTERNAL IMPLEMENTATION DETAILS ====
// =========================================
private[akka] def getSender = sender
private def spawnButDoNotStart[T <: Actor](actorClass: Class[T]): T = {
val actor = actorClass.newInstance.asInstanceOf[T]
if (!dispatcher.isInstanceOf[ThreadBasedDispatcher]) {