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Improved priority mailbox usage, and documentation. See #1458

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This commit is contained in:
Patrik Nordwall 2011-12-21 20:34:46 +01:00
parent c4401f1ca8
commit 817c3c5ee7
6 changed files with 115 additions and 118 deletions
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64
akka-docs/java/code/akka/docs/dispatcher/DispatcherDocTestBase.java
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@ -14,15 +14,18 @@ import akka.dispatch.MessageDispatcher;
import akka.actor.UntypedActor;
import akka.actor.UntypedActorFactory;
import akka.actor.Actors;
import akka.dispatch.PriorityGenerator;
import akka.dispatch.UnboundedPriorityMailbox;
import akka.dispatch.MessageDispatcherConfigurator;
import akka.dispatch.DispatcherPrerequisites;
import akka.event.Logging;
import akka.event.LoggingAdapter;
//#imports-prio
//#imports-prio-mailbox
import akka.dispatch.PriorityGenerator;
import akka.dispatch.UnboundedPriorityMailbox;
import com.typesafe.config.Config;
//#imports-prio-mailbox
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
@ -73,34 +76,6 @@ public class DispatcherDocTestBase {
@Test
public void priorityDispatcher() throws Exception {
//#prio-dispatcher
final PriorityGenerator generator = new PriorityGenerator() { // Create a new PriorityGenerator, lower prio means more important
@Override
public int gen(Object message) {
if (message.equals("highpriority"))
return 0; // 'highpriority messages should be treated first if possible
else if (message.equals("lowpriority"))
return 100; // 'lowpriority messages should be treated last if possible
else if (message.equals(Actors.poisonPill()))
return 1000; // PoisonPill when no other left
else
return 50; // We default to 50
}
};
// FIXME #1458: how should we make it easy to configure prio mailbox?
// We create a new Priority dispatcher and seed it with the priority generator
final String dispatcherKey = "prio-dispatcher";
MessageDispatcherConfigurator dispatcherConfigurator = new MessageDispatcherConfigurator(system.dispatchers()
.defaultDispatcherConfig(), system.dispatchers().prerequisites()) {
private final MessageDispatcher instance = system.dispatchers()
.newDispatcher(dispatcherKey, 5, new UnboundedPriorityMailbox(generator)).build();
@Override
public MessageDispatcher dispatcher() {
return instance;
}
};
system.dispatchers().register(dispatcherKey, dispatcherConfigurator);
ActorRef myActor = system.actorOf( // We create a new Actor that just prints out what it processes
new Props().withCreator(new UntypedActorFactory() {
@ -123,7 +98,7 @@ public class DispatcherDocTestBase {
}
};
}
}).withDispatcher(dispatcherKey));
}).withDispatcher("prio-dispatcher-java"));
/*
Logs:
@ -143,4 +118,27 @@ public class DispatcherDocTestBase {
Thread.sleep(100);
}
}
//#prio-mailbox
public static class PrioMailbox extends UnboundedPriorityMailbox {
static final PriorityGenerator generator = new PriorityGenerator() { // Create a new PriorityGenerator, lower prio means more important
@Override
public int gen(Object message) {
if (message.equals("highpriority"))
return 0; // 'highpriority messages should be treated first if possible
else if (message.equals("lowpriority"))
return 100; // 'lowpriority messages should be treated last if possible
else if (message.equals(Actors.poisonPill()))
return 1000; // PoisonPill when no other left
else
return 50; // We default to 50
}
};
public PrioMailbox(Config config) {
super(generator);
}
}
//#prio-mailbox
}