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Decoupling system message implementation details from the Mailbox

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This commit is contained in:
Viktor Klang 2011-09-21 16:27:31 +02:00
parent 7c63f94169
commit 3d12e47e7d
10 changed files with 72 additions and 49 deletions
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21
akka-actor/src/main/scala/akka/dispatch/MessageHandling.scala
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@ -78,12 +78,17 @@ abstract class MessageDispatcher extends Serializable {
/**
* Create a blackhole mailbox for the purpose of replacing the real one upon actor termination
*/
protected[akka] def createDeadletterMailbox = new Mailbox {
override def dispatcher = MessageDispatcher.this
override def enqueue(envelope: Envelope) {}
protected[akka] val deadLetterMailbox = new Mailbox {
override def dispatcher = null //MessageDispatcher.this
dispatcherLock.tryLock()
override def enqueue(envelope: Envelope) { envelope.channel sendException new ActorKilledException("Actor has been stopped") }
override def dequeue() = null
override def isEmpty = true
override def size = 0
override def systemEnqueue(handle: SystemEnvelope): Unit = ()
override def systemDequeue(): SystemEnvelope = null
override def hasMessages = false
override def hasSystemMessages = false
override def numberOfMessages = 0
}
/**
@ -170,7 +175,7 @@ abstract class MessageDispatcher extends Serializable {
protected[akka] def unregister(actor: ActorCell) = {
if (uuids remove actor.uuid) {
cleanUpMailboxFor(actor)
actor.mailbox = createDeadletterMailbox
actor.mailbox = deadLetterMailbox
if (uuids.isEmpty && _tasks.get == 0) {
shutdownSchedule match {
case UNSCHEDULED ⇒
@ -274,12 +279,12 @@ abstract class MessageDispatcher extends Serializable {
/**
* Returns the size of the mailbox for the specified actor
*/
def mailboxSize(actor: ActorCell): Int = actor.mailbox.size
def mailboxSize(actor: ActorCell): Int = actor.mailbox.numberOfMessages
/**
* Returns the "current" emptiness status of the mailbox for the specified actor
*/
def mailboxIsEmpty(actor: ActorCell): Boolean = actor.mailbox.isEmpty
def mailboxIsEmpty(actor: ActorCell): Boolean = actor.mailbox.hasMessages
/**
* Returns the amount of tasks queued for execution