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#3077 - Deprecating ActorRef.isTerminated

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This commit is contained in:
Viktor Klang 2013-03-31 03:04:12 +02:00
parent 718e2d115c
commit 7b263365aa
12 changed files with 61 additions and 64 deletions
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12
akka-actor-tests/src/test/scala/akka/serialization/SerializeSpec.scala
View file

@ -348,23 +348,23 @@ class SerializationCompatibilitySpec extends AkkaSpec(SerializationTests.mostlyR
verify(Terminate(), "aced00057372000c7363616c612e5475706c6532bc7daadf46211a990200024c00025f317400124c6a6176612f6c616e672f4f626a6563743b4c00025f3271007e000178707372001e616b6b612e64697370617463682e7379736d73672e5465726d696e61746509d66ca68318700f02000078707671007e0003")
}
"be preserved for the Supervise SystemMessage" in {
verify(Supervise(FakeActorRef("child"), true), "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")
verify(Supervise(FakeActorRef("child"), true), "aced00057372000c7363616c612e5475706c6532bc7daadf46211a990200024c00025f317400124c6a6176612f6c616e672f4f626a6563743b4c00025f3271007e000178707372001e616b6b612e64697370617463682e7379736d73672e5375706572766973652d0b363f56ab5feb0200025a00056173796e634c00056368696c647400154c616b6b612f6163746f722f4163746f725265663b7870017372001f616b6b612e73657269616c697a6174696f6e2e46616b654163746f7252656600000000000000010200014c00046e616d657400124c6a6176612f6c616e672f537472696e673b7872001b616b6b612e6163746f722e496e7465726e616c4163746f72526566869e6c3669e60e5f02000078720013616b6b612e6163746f722e4163746f72526566c3585dde655f469402000078707400056368696c647671007e0003")
}
"be preserved for the ChildTerminated SystemMessage" in {
verify(ChildTerminated(FakeActorRef("child")), "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")
verify(ChildTerminated(FakeActorRef("child")), "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")
}
"be preserved for the Watch SystemMessage" in {
verify(Watch(FakeActorRef("watchee"), FakeActorRef("watcher")), "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")
verify(Watch(FakeActorRef("watchee"), FakeActorRef("watcher")), "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")
}
"be preserved for the Unwatch SystemMessage" in {
verify(Unwatch(FakeActorRef("watchee"), FakeActorRef("watcher")), "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")
verify(Unwatch(FakeActorRef("watchee"), FakeActorRef("watcher")), "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")
}
"be preserved for the NoMessage SystemMessage" in {
verify(NoMessage, "aced00057372000c7363616c612e5475706c6532bc7daadf46211a990200024c00025f317400124c6a6176612f6c616e672f4f626a6563743b4c00025f3271007e000178707372001f616b6b612e64697370617463682e7379736d73672e4e6f4d65737361676524b401a3610ccb70dd02000078707671007e0003")
}
"be preserved for the Failed SystemMessage" in {
// Using null as the cause to avoid a large serialized message
verify(Failed(FakeActorRef("child"), cause = null, uid = 0), "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")
verify(Failed(FakeActorRef("child"), cause = null, uid = 0), "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")
}
}
}
@ -411,7 +411,7 @@ protected[akka] case class FakeThrowable(msg: String) extends Throwable(msg) wit
protected[akka] case class FakeActorRef(name: String) extends InternalActorRef with ActorRefScope {
override def path = RootActorPath(Address("proto", "SomeSystem"), name)
override def forward(message: Any)(implicit context: ActorContext) = ???
override def isTerminated = ???
@deprecated("Use context.watch(actor) and receive Terminated(actor)", "2.2") override def isTerminated = ???
override def start() = ???
override def resume(causedByFailure: Throwable) = ???
override def suspend() = ???

14
akka-actor/src/main/scala/akka/actor/ActorRef.scala
View file

@ -133,7 +133,7 @@ abstract class ActorRef extends java.lang.Comparable[ActorRef] with Serializable
* The contract is that if this method returns true, then it will never be false again.
* But you cannot rely on that it is alive if it returns false, since this by nature is a racy method.
*/
def isTerminated: Boolean
@deprecated("Use context.watch(actor) and receive Terminated(actor)", "2.2") def isTerminated: Boolean
final override def hashCode: Int = {
if (path.uid == ActorCell.undefinedUid) path.hashCode
@ -247,6 +247,12 @@ private[akka] abstract class InternalActorRef extends ActorRef with ScalaActorRe
* i.e. whose mailbox is directly reachable etc.
*/
def isLocal: Boolean
/**
* Returns “true” if the actor is locally known to be terminated, “false” if
* alive or uncertain.
*/
def isTerminated: Boolean
}
/**
@ -302,7 +308,7 @@ private[akka] class LocalActorRef private[akka] (
* If this method returns true, it will never return false again, but if it
* returns false, you cannot be sure if it's alive still (race condition)
*/
override def isTerminated: Boolean = actorCell.isTerminated
@deprecated("Use context.watch(actor) and receive Terminated(actor)", "2.2") override def isTerminated: Boolean = actorCell.isTerminated
/**
* Starts the actor after initialization.
@ -428,7 +434,7 @@ private[akka] trait MinimalActorRef extends InternalActorRef with LocalRef {
override def suspend(): Unit = ()
override def resume(causedByFailure: Throwable): Unit = ()
override def stop(): Unit = ()
override def isTerminated = false
@deprecated("Use context.watch(actor) and receive Terminated(actor)", "2.2") override def isTerminated = false
override def !(message: Any)(implicit sender: ActorRef = Actor.noSender): Unit = ()
@ -469,7 +475,7 @@ private[akka] class EmptyLocalActorRef(override val provider: ActorRefProvider,
override val path: ActorPath,
val eventStream: EventStream) extends MinimalActorRef {
override def isTerminated: Boolean = true
@deprecated("Use context.watch(actor) and receive Terminated(actor)", "2.2") override def isTerminated(): Boolean = true
override def sendSystemMessage(message: SystemMessage): Unit = {
if (Mailbox.debug) println(s"ELAR $path having enqueued $message")

2
akka-actor/src/main/scala/akka/actor/ActorRefProvider.scala
View file

@ -386,7 +386,7 @@ private[akka] class LocalActorRefProvider private[akka] (
def provider: ActorRefProvider = LocalActorRefProvider.this
override def stop(): Unit = stopped switchOn { terminationPromise.complete(causeOfTermination.map(Failure(_)).getOrElse(Success(()))) }
override def isTerminated: Boolean = stopped.isOn
@deprecated("Use context.watch(actor) and receive Terminated(actor)", "2.2") override def isTerminated: Boolean = stopped.isOn
override def !(message: Any)(implicit sender: ActorRef = Actor.noSender): Unit = stopped.ifOff(message match {
case null ⇒ throw new InvalidMessageException("Message is null")

4
akka-actor/src/main/scala/akka/actor/FSM.scala
View file

@ -553,12 +553,12 @@ trait FSM[S, D] extends Listeners with ActorLogging {
processMsg(msg, t)
}
case SubscribeTransitionCallBack(actorRef) ⇒
// TODO use DeathWatch to clean up list
// TODO Use context.watch(actor) and receive Terminated(actor) to clean up list
listeners.add(actorRef)
// send current state back as reference point
actorRef ! CurrentState(self, currentState.stateName)
case Listen(actorRef) ⇒
// TODO use DeathWatch to clean up list
// TODO Use context.watch(actor) and receive Terminated(actor) to clean up list
listeners.add(actorRef)
// send current state back as reference point
actorRef ! CurrentState(self, currentState.stateName)

2
akka-actor/src/main/scala/akka/actor/RepointableActorRef.scala
View file

@ -129,7 +129,7 @@ private[akka] class RepointableActorRef(
case _ ⇒ true
}
def isTerminated: Boolean = underlying.isTerminated
@deprecated("Use context.watch(actor) and receive Terminated(actor)", "2.2") def isTerminated: Boolean = underlying.isTerminated
def provider: ActorRefProvider = system.provider

2
akka-actor/src/main/scala/akka/pattern/AskSupport.scala
View file

@ -215,7 +215,7 @@ private[akka] final class PromiseActorRef private (val provider: ActorRefProvide
case _ ⇒
}
override def isTerminated: Boolean = state match {
@deprecated("Use context.watch(actor) and receive Terminated(actor)", "2.2") override def isTerminated: Boolean = state match {
case Stopped | _: StoppedWithPath ⇒ true
case _ ⇒ false
}

28
akka-docs/rst/java/code/docs/dispatcher/DispatcherDocTestBase.java
View file

@ -16,6 +16,7 @@ import akka.event.LoggingAdapter;
//#imports-prio-mailbox
import akka.dispatch.PriorityGenerator;
import akka.dispatch.UnboundedPriorityMailbox;
import akka.testkit.JavaTestKit;
import com.typesafe.config.Config;
//#imports-prio-mailbox
@ -83,6 +84,7 @@ public class DispatcherDocTestBase {
@Test
public void priorityDispatcher() throws Exception {
JavaTestKit probe = new JavaTestKit(system);
//#prio-dispatcher
// We create a new Actor that just prints out what it processes
@ -93,14 +95,17 @@ public class DispatcherDocTestBase {
LoggingAdapter log =
Logging.getLogger(getContext().system(), this);
{
getSelf().tell("lowpriority", getSelf());
getSelf().tell("lowpriority", getSelf());
getSelf().tell("highpriority", getSelf());
getSelf().tell("pigdog", getSelf());
getSelf().tell("pigdog2", getSelf());
getSelf().tell("pigdog3", getSelf());
getSelf().tell("highpriority", getSelf());
getSelf().tell(PoisonPill.getInstance(), getSelf());
for(Object msg : new Object[] {
"lowpriority",
"lowpriority",
"highpriority",
"pigdog",
"pigdog2",
"pigdog3",
"highpriority",
PoisonPill.getInstance() }) {
getSelf().tell(msg, getSelf());
}
}
public void onReceive(Object message) {
@ -122,11 +127,8 @@ public class DispatcherDocTestBase {
*/
//#prio-dispatcher
for (int i = 0; i < 10; i++) {
if (myActor.isTerminated())
break;
Thread.sleep(100);
}
probe.watch(myActor);
probe.expectMsgClass(Terminated.class);
}
static

23
akka-docs/rst/java/code/docs/jrouting/RouterViaProgramDocTestBase.java
View file

@ -3,12 +3,7 @@
*/
package docs.jrouting;
import akka.actor.ActorRef;
import akka.actor.ActorSystem;
import akka.actor.Kill;
import akka.actor.PoisonPill;
import akka.actor.Props;
import akka.actor.UntypedActor;
import akka.actor.*;
import akka.remote.routing.RemoteRouterConfig;
import akka.routing.Broadcast;
import akka.routing.RoundRobinRouter;
@ -83,11 +78,11 @@ public class RouterViaProgramDocTestBase {
public void demonstratePoisonPill() {
new JavaTestKitWithSelf(system) {{
ActorRef router = system.actorOf(new Props(Echo.class).withRouter(new RoundRobinRouter(5)));
watch(router);
//#poisonPill
router.tell(PoisonPill.getInstance(), getSelf());
//#poisonPill
expectNoMsg(duration("1 seconds"));
Assert.assertTrue(router.isTerminated());
expectMsgClass(Terminated.class);
}};
}
@ -95,11 +90,11 @@ public class RouterViaProgramDocTestBase {
public void demonstrateBroadcastOfPoisonPill() {
new JavaTestKitWithSelf(system) {{
ActorRef router = system.actorOf(new Props(Echo.class).withRouter(new RoundRobinRouter(5)));
watch(router);
//#broadcastPoisonPill
router.tell(new Broadcast(PoisonPill.getInstance()), getSelf());
//#broadcastPoisonPill
expectNoMsg(duration("1 seconds"));
Assert.assertTrue(router.isTerminated());
expectMsgClass(Terminated.class);
}};
}
@ -107,11 +102,11 @@ public class RouterViaProgramDocTestBase {
public void demonstrateKill() {
new JavaTestKitWithSelf(system) {{
ActorRef router = system.actorOf(new Props(Echo.class).withRouter(new RoundRobinRouter(5)));
watch(router);
//#kill
router.tell(Kill.getInstance(), getSelf());
//#kill
expectNoMsg(duration("1 seconds"));
Assert.assertTrue(router.isTerminated());
expectMsgClass(Terminated.class);
}};
}
@ -119,11 +114,11 @@ public class RouterViaProgramDocTestBase {
public void demonstrateBroadcastOfKill() {
new JavaTestKitWithSelf(system) {{
ActorRef router = system.actorOf(new Props(Echo.class).withRouter(new RoundRobinRouter(5)));
watch(router);
//#broadcastKill
router.tell(new Broadcast(Kill.getInstance()), getSelf());
//#broadcastKill
expectNoMsg(duration("1 seconds"));
Assert.assertTrue(router.isTerminated());
expectMsgClass(Terminated.class);
}};
}

5
akka-docs/rst/scala/code/docs/actor/FaultHandlingDocSpec.scala
View file

@ -115,10 +115,7 @@ class FaultHandlingDocSpec extends AkkaSpec with ImplicitSender {
//#stop
watch(child) // have testActor watch “child”
child ! new IllegalArgumentException // break it
expectMsgPF() {
case t @ Terminated(`child`) if t.existenceConfirmed ⇒ ()
}
child.isTerminated must be(true)
expectMsgPF() { case Terminated(`child`) ⇒ () }
//#stop
}
EventFilter[Exception]("CRASH", occurrences = 2) intercept {

5
akka-docs/rst/scala/code/docs/dispatcher/DispatcherDocSpec.scala
View file

@ -11,7 +11,7 @@ import akka.testkit.AkkaSpec
import akka.event.Logging
import akka.event.LoggingAdapter
import scala.concurrent.duration._
import akka.actor.{ Props, Actor, PoisonPill, ActorSystem }
import akka.actor._
object DispatcherDocSpec {
val config = """
@ -227,7 +227,8 @@ class DispatcherDocSpec extends AkkaSpec(DispatcherDocSpec.config) {
*/
//#prio-dispatcher
awaitCond(a.isTerminated, 5 seconds)
watch(a)
expectMsgPF() { case Terminated(`a`) ⇒ () }
}
"defining balancing dispatcher" in {

26
akka-docs/rst/scala/code/docs/routing/RouterViaProgramDocSpec.scala
View file

@ -3,7 +3,7 @@
*/
package docs.routing
import akka.actor.{ Actor, ActorRef, ActorSystem, Props, ActorLogging }
import akka.actor._
import akka.routing.ConsistentHashingRouter.ConsistentHashable
import akka.routing.FromConfig
import akka.routing.RoundRobinRouter
@ -37,8 +37,8 @@ class RouterViaProgramDocSpec extends AkkaSpec with ImplicitSender {
val actor2 = system.actorOf(Props[ExampleActor1], "actor2")
val actor3 = system.actorOf(Props[ExampleActor1], "actor3")
val routees = Vector[String]("/user/actor1", "/user/actor2", "/user/actor3")
val router = system.actorOf(Props().withRouter(
RoundRobinRouter(routees = routees)))
val router = system.actorOf(
Props().withRouter(RoundRobinRouter(routees = routees)))
//#programmaticRoutingRouteePaths
1 to 6 foreach { i ⇒ router ! Message1(i) }
val received = receiveN(6, 5.seconds.dilated)
@ -59,45 +59,41 @@ class RouterViaProgramDocSpec extends AkkaSpec with ImplicitSender {
}
"demonstrate PoisonPill" in {
val router = system.actorOf(Props[Echo].withRouter(RoundRobinRouter(nrOfInstances = 5)))
val router = watch(system.actorOf(Props[Echo].withRouter(RoundRobinRouter(nrOfInstances = 5))))
//#poisonPill
import akka.actor.PoisonPill
router ! PoisonPill
//#poisonPill
expectNoMsg(1.seconds.dilated)
router.isTerminated must be(true)
expectMsgPF() { case Terminated(`router`) ⇒ () }
}
"demonstrate broadcast of PoisonPill" in {
val router = system.actorOf(Props[Echo].withRouter(RoundRobinRouter(nrOfInstances = 5)))
val router = watch(system.actorOf(Props[Echo].withRouter(RoundRobinRouter(nrOfInstances = 5))))
//#broadcastPoisonPill
import akka.actor.PoisonPill
import akka.routing.Broadcast
router ! Broadcast(PoisonPill)
//#broadcastPoisonPill
expectNoMsg(1.seconds.dilated)
router.isTerminated must be(true)
expectMsgPF() { case Terminated(`router`) ⇒ () }
}
"demonstrate Kill" in {
val router = system.actorOf(Props[Echo].withRouter(RoundRobinRouter(nrOfInstances = 5)))
val router = watch(system.actorOf(Props[Echo].withRouter(RoundRobinRouter(nrOfInstances = 5))))
//#kill
import akka.actor.Kill
router ! Kill
//#kill
expectNoMsg(1.seconds.dilated)
router.isTerminated must be(true)
expectMsgPF() { case Terminated(`router`) ⇒ () }
}
"demonstrate broadcast of Kill" in {
val router = system.actorOf(Props[Echo].withRouter(RoundRobinRouter(nrOfInstances = 5)))
val router = watch(system.actorOf(Props[Echo].withRouter(RoundRobinRouter(nrOfInstances = 5))))
//#broadcastKill
import akka.actor.Kill
import akka.routing.Broadcast
router ! Broadcast(Kill)
//#broadcastKill
expectNoMsg(1.seconds.dilated)
router.isTerminated must be(true)
expectMsgPF() { case Terminated(`router`) ⇒ () }
}
}

2
akka-remote/src/main/scala/akka/remote/RemoteActorRefProvider.scala
View file

@ -356,7 +356,7 @@ private[akka] class RemoteActorRef private[akka] (
}
}
def isTerminated: Boolean = false
@deprecated("Use context.watch(actor) and receive Terminated(actor)", "2.2") override def isTerminated: Boolean = false
private def handleException: Catcher[Unit] = {
case e: InterruptedException ⇒