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!per #3761 Reliable channels

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- Built-in redelivery mechanism for Channel and PersistentChannel
- redelivery counter on ConfirmablePersistent
- redeliveries out of initial message delivery order
- relative order of redelivered messages is preserved
- configurable redelivery policy (ChannelSettings)
- Major refactorings of channels (and channel tests)
- Throughput load test for PersistentChannel

Todo:

- Paged/throtlled replay (another pull request)
- Resequencer (another pull request)
This commit is contained in:
Martin Krasser 2013-12-06 12:48:44 +01:00
parent 3231bb3729
commit 4e5ce5529c
27 changed files with 1980 additions and 844 deletions
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64
akka-docs/rst/java/code/docs/persistence/PersistenceDocTest.java
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@ -4,9 +4,13 @@
package docs.persistence;
import java.util.concurrent.TimeUnit;
import scala.Option;
import scala.concurrent.duration.Duration;
import akka.actor.*;
import akka.japi.Procedure;
import akka.persistence.*;
import static java.util.Arrays.asList;
@ -144,7 +148,10 @@ public class PersistenceDocTest {
public void onReceive(Object message) throws Exception {
if (message instanceof ConfirmablePersistent) {
ConfirmablePersistent p = (ConfirmablePersistent)message;
System.out.println("received " + p.payload());
Object payload = p.payload();
Long sequenceNr = p.sequenceNr();
int redeliveries = p.redeliveries();
// ...
p.confirm();
}
}
@ -160,6 +167,13 @@ public class PersistenceDocTest {
//#channel-id-override
this.channel = getContext().actorOf(Channel.props("my-stable-channel-id"));
//#channel-id-override
//#channel-custom-settings
getContext().actorOf(Channel.props(
ChannelSettings.create()
.withRedeliverInterval(Duration.create(30, TimeUnit.SECONDS))
.withRedeliverMax(15)));
//#channel-custom-settings
}
public void onReceive(Object message) throws Exception {
@ -273,12 +287,56 @@ public class PersistenceDocTest {
public void foo() {
//#persistent-channel-example
final ActorRef channel = getContext().actorOf(PersistentChannel.props(),
"myPersistentChannel");
final ActorRef channel = getContext().actorOf(PersistentChannel.props(
PersistentChannelSettings.create()
.withRedeliverInterval(Duration.create(30, TimeUnit.SECONDS))
.withRedeliverMax(15)), "myPersistentChannel");
channel.tell(Deliver.create(Persistent.create("example"), destination), getSelf());
//#persistent-channel-example
//#persistent-channel-reply
PersistentChannelSettings.create().withReplyPersistent(true);
//#persistent-channel-reply
}
}
};
static Object o8 = new Object() {
//#reliable-event-delivery
class MyEventsourcedProcessor extends UntypedEventsourcedProcessor {
private ActorRef destination;
private ActorRef channel;
public MyEventsourcedProcessor(ActorRef destination) {
this.destination = destination;
this.channel = getContext().actorOf(Channel.props(), "channel");
}
private void handleEvent(String event) {
// update state
// ...
// reliably deliver events
channel.tell(Deliver.create(Persistent.create(
event, getCurrentPersistentMessage()), destination), getSelf());
}
public void onReceiveReplay(Object msg) {
if (msg instanceof String) {
handleEvent((String)msg);
}
}
public void onReceiveCommand(Object msg) {
if (msg.equals("cmd")) {
persist("evt", new Procedure<String>() {
public void apply(String event) {
handleEvent(event);
}
});
}
}
}
//#reliable-event-delivery
};
}