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+per #15424 Added PersistentView, deprecated View

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A PersistentView works the same way as View did previously, except:

* it requires an `peristenceId` (no default is provided)
* messages given to `receive` are NOT wrapped in Persistent()

akka-streams not touched, will update them afterwards on different branch

Also solves #15436 by making persistentId in PersistentView abstract.

(cherry picked from commit dcafaf788236fe6d018388dd55d5bf9650ded696)

Conflicts:
	akka-docs/rst/java/lambda-persistence.rst
	akka-docs/rst/java/persistence.rst
	akka-docs/rst/scala/persistence.rst
	akka-persistence/src/main/scala/akka/persistence/Persistent.scala
	akka-persistence/src/main/scala/akka/persistence/View.scala
This commit is contained in:
Konrad 'ktoso' Malawski 2014-06-24 16:57:33 +02:00 • committed by Patrik Nordwall
parent 2203968adb
commit 3fd240384c
22 changed files with 847 additions and 192 deletions
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82
akka-samples/akka-sample-persistence-java/src/main/java/sample/persistence/ViewExample.java
View file

@ -1,82 +0,0 @@
package sample.persistence;
import java.util.concurrent.TimeUnit;
import scala.concurrent.duration.Duration;
import akka.actor.*;
import akka.persistence.*;
import akka.japi.Procedure;
public class ViewExample {
public static class ExamplePersistentActor extends UntypedPersistentActor {
private int count = 1;
@Override
public String persistenceId() {
return "persistentActor-5";
}
@Override
public void onReceiveRecover(Object message) {
if (message instanceof String) {
count += 1;
} else {
unhandled(message);
}
}
@Override
public void onReceiveCommand(Object message) {
if (message instanceof String) {
String s = (String) message;
System.out.println(String.format("persistentActor received %s (nr = %d)", s, count));
persist(s + count, new Procedure<String>() {
public void apply(String evt) {
count += 1;
}
});
} else {
unhandled(message);
}
}
}
public static class ExampleView extends UntypedView {
private int numReplicated = 0;
@Override
public String viewId() {
return "view-5";
}
@Override
public String persistenceId() {
return "persistentActor-5";
}
@Override
public void onReceive(Object message) throws Exception {
if (message instanceof Persistent) {
Persistent p = (Persistent)message;
numReplicated += 1;
System.out.println(String.format("view received %s (num replicated = %d)", p.payload(), numReplicated));
} else if (message instanceof SnapshotOffer) {
SnapshotOffer so = (SnapshotOffer)message;
numReplicated = (Integer)so.snapshot();
System.out.println(String.format("view received snapshot offer %s (metadata = %s)", numReplicated, so.metadata()));
} else if (message.equals("snap")) {
saveSnapshot(numReplicated);
}
}
}
public static void main(String... args) throws Exception {
final ActorSystem system = ActorSystem.create("example");
final ActorRef persistentActor = system.actorOf(Props.create(ExamplePersistentActor.class));
final ActorRef view = system.actorOf(Props.create(ExampleView.class));
system.scheduler().schedule(Duration.Zero(), Duration.create(2, TimeUnit.SECONDS), persistentActor, "scheduled", system.dispatcher(), null);
system.scheduler().schedule(Duration.Zero(), Duration.create(5, TimeUnit.SECONDS), view, "snap", system.dispatcher(), null);
}
}