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fixed race bug in supervisor:Exit(..) handling

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jboner 2009-07-28 15:21:25 +02:00
parent b26c3fa71e
commit 6d6d815f56
4 changed files with 241 additions and 106 deletions
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akka.iws
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@ -6,10 +6,9 @@
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9
kernel/src/main/scala/actor/Actor.scala
View file

@ -265,8 +265,11 @@ object Actor {
* Sets the dispatcher for this actor. Needs to be invoked before the actor is started.
*/
def setDispatcher(disp: MessageDispatcher) = synchronized {
if (!isRunning) dispatcher = disp
else throw new IllegalArgumentException("Can not swap dispatcher for " + toString + " after it has been started")
if (!isRunning) {
dispatcher = disp
mailbox = dispatcher.messageQueue
dispatcher.registerHandler(this, new ActorMessageInvoker(this))
} else throw new IllegalArgumentException("Can not swap dispatcher for " + toString + " after it has been started")
}
/**
@ -579,7 +582,7 @@ object Actor {
}
private[kernel] def swapDispatcher(disp: MessageDispatcher) = {
private[kernel] def swapDispatcher(disp: MessageDispatcher) = synchronized {
dispatcher = disp
mailbox = dispatcher.messageQueue
dispatcher.registerHandler(this, new ActorMessageInvoker(this))

23
kernel/src/main/scala/reactor/EventBasedThreadPoolDispatcher.scala
View file

@ -82,10 +82,10 @@ class EventBasedThreadPoolDispatcher extends MessageDispatcherBase {
override def run = {
while (active) {
try {
//try {
// guard.synchronized { /* empty */ } // prevents risk for deadlock as described in [http://developers.sun.com/learning/javaoneonline/2006/coreplatform/TS-1315.pdf]
try {
guard.synchronized { /* empty */ } // prevents risk for deadlock as described in [http://developers.sun.com/learning/javaoneonline/2006/coreplatform/TS-1315.pdf]
messageDemultiplexer.select
//} catch { case e: InterruptedException => active = false }
} catch { case e: InterruptedException => active = false }
val selectedInvocations = messageDemultiplexer.acquireSelectedInvocations
val reservedInvocations = reserve(selectedInvocations)
val it = reservedInvocations.entrySet.iterator
@ -112,14 +112,21 @@ class EventBasedThreadPoolDispatcher extends MessageDispatcherBase {
override protected def doShutdown = executor.shutdownNow
private def reserve(invocations: List[MessageInvocation]): HashMap[MessageInvocation, MessageInvoker] = synchronized {
// if (CONCURRENT_MODE && messageHandlers.containsKey(key)) Some(messageHandlers.get(key))
private def reserve(invocations: List[MessageInvocation]): HashMap[MessageInvocation, MessageInvoker] = guard.synchronized {
val result = new HashMap[MessageInvocation, MessageInvoker]
val iterator = invocations.iterator
while (iterator.hasNext) {
val invocation = iterator.next
if (!busyInvokers.contains(invocation.sender)) {
result.put(invocation, messageHandlers.get(invocation.sender))
if (CONCURRENT_MODE) {
val invoker = messageHandlers.get(invocation.sender)
if (invocation == null) throw new IllegalStateException("Message invocation is null [" + invocation + "]")
if (invoker == null) throw new IllegalStateException("Message invoker for invocation [" + invocation + "] is null")
result.put(invocation, invoker)
} else if (!busyInvokers.contains(invocation.sender)) {
val invoker = messageHandlers.get(invocation.sender)
if (invocation == null) throw new IllegalStateException("Message invocation is null [" + invocation + "]")
if (invoker == null) throw new IllegalStateException("Message invoker for invocation [" + invocation + "] is null")
result.put(invocation, invoker)
busyInvokers.add(invocation.sender)
iterator.remove
}
@ -127,7 +134,7 @@ class EventBasedThreadPoolDispatcher extends MessageDispatcherBase {
result
}
private def free(invoker: AnyRef) = synchronized {
private def free(invoker: AnyRef) = guard.synchronized {
if (!CONCURRENT_MODE) busyInvokers.remove(invoker)
}

4
kernel/src/main/scala/reactor/MessageDispatcherBase.scala
View file

@ -21,11 +21,11 @@ trait MessageDispatcherBase extends MessageDispatcher {
def messageQueue = queue
def registerHandler(key: AnyRef, handler: MessageInvoker) = synchronized {
def registerHandler(key: AnyRef, handler: MessageInvoker) = guard.synchronized {
messageHandlers.put(key, handler)
}
def unregisterHandler(key: AnyRef) = synchronized {
def unregisterHandler(key: AnyRef) = guard.synchronized {
messageHandlers.remove(key)
}