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=per #15429 Rewrite persistence documentation and samples for 2.3.4 changes

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(cherry picked from commit 02351e32f110a8c4a249f0f3f84bae5898d1a836)

Conflicts:
	akka-samples/akka-sample-persistence-java-lambda/tutorial/index.html
	akka-samples/akka-sample-persistence-java/tutorial/index.html
	akka-samples/akka-sample-persistence-scala/build.sbt
	akka-samples/akka-sample-persistence-scala/src/main/scala/sample/persistence/ConversationRecoveryExample.scala
	akka-samples/akka-sample-persistence-scala/src/main/scala/sample/persistence/PersistentActorExample.scala
	akka-samples/akka-sample-persistence-scala/src/main/scala/sample/persistence/ProcessorChannelExample.scala
	akka-samples/akka-sample-persistence-scala/src/main/scala/sample/persistence/ProcessorChannelRemoteExample.scala
	akka-samples/akka-sample-persistence-scala/src/main/scala/sample/persistence/SnapshotExample.scala
	akka-samples/akka-sample-persistence-scala/src/main/scala/sample/persistence/StreamExample.scala
	akka-samples/akka-sample-persistence-scala/tutorial/index.html
This commit is contained in:
Patrik Nordwall 2014-06-25 12:51:21 +02:00
parent 062d304b73
commit d6ffdf521c
35 changed files with 1091 additions and 2276 deletions
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54
akka-samples/akka-sample-persistence-java/src/main/java/sample/persistence/SnapshotExample.java
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@ -5,6 +5,7 @@ import java.util.ArrayList;
import akka.actor.*;
import akka.persistence.*;
import akka.japi.Procedure;
public class SnapshotExample {
public static class ExampleState implements Serializable {
@ -32,38 +33,57 @@ public class SnapshotExample {
}
}
public static class ExampleProcessor extends UntypedProcessor {
public static class ExamplePersistentActor extends UntypedPersistentActor {
private ExampleState state = new ExampleState();
@Override
public void onReceive(Object message) throws Exception {
if (message instanceof Persistent) {
Persistent persistent = (Persistent)message;
state.update(String.format("%s-%d", persistent.payload(), persistent.sequenceNr()));
} else if (message instanceof SnapshotOffer) {
ExampleState s = (ExampleState)((SnapshotOffer)message).snapshot();
System.out.println("offered state = " + s);
state = s;
} else if (message.equals("print")) {
public void onReceiveCommand(Object message) {
if (message.equals("print")) {
System.out.println("current state = " + state);
} else if (message.equals("snap")) {
// IMPORTANT: create a copy of snapshot
// because ExampleState is mutable !!!
saveSnapshot(state.copy());
} else if (message instanceof SaveSnapshotSuccess) {
// ...
} else if (message instanceof SaveSnapshotFailure) {
// ...
} else if (message instanceof String) {
String s = (String) message;
persist(s, new Procedure<String>() {
public void apply(String evt) throws Exception {
state.update(evt);
}
});
} else {
unhandled(message);
}
}
@Override
public void onReceiveRecover(Object message) {
if (message instanceof SnapshotOffer) {
ExampleState s = (ExampleState)((SnapshotOffer)message).snapshot();
System.out.println("offered state = " + s);
state = s;
} else if (message instanceof String) {
state.update((String) message);
} else {
unhandled(message);
}
}
}
public static void main(String... args) throws Exception {
final ActorSystem system = ActorSystem.create("example");
final ActorRef processor = system.actorOf(Props.create(ExampleProcessor.class), "processor-3-java");
final ActorRef persistentActor = system.actorOf(Props.create(ExamplePersistentActor.class), "persistentActor-3-java");
processor.tell(Persistent.create("a"), null);
processor.tell(Persistent.create("b"), null);
processor.tell("snap", null);
processor.tell(Persistent.create("c"), null);
processor.tell(Persistent.create("d"), null);
processor.tell("print", null);
persistentActor.tell("a", null);
persistentActor.tell("b", null);
persistentActor.tell("snap", null);
persistentActor.tell("c", null);
persistentActor.tell("d", null);
persistentActor.tell("print", null);
Thread.sleep(1000);
system.shutdown();