a0a541eda7
- Provided new interfaces for akka-persistence to be usable directly through ReceiveBuilder/PartialFunction. Added a sample java project to showcase the usage of these API's with akka-persistence. - Fixed a minor comment block in javadoc code snippet. - Renamed java event persistor and fixed a documentation typo. - Put back java event persistence methods in UntypedEventsourcedProcessor and copied them into AbstractEventsourcedProcessor for the sake of clarity in javadocs. Also corrected some doc punctuations. - Documentation for akka-persistence java 8 lambda expressions support. - Moved code examples referred from within lambda-persistence.rst to java8 compatible sample project. - Removed remaining unwanted java8 compatible source files.
100 lines
3.9 KiB
Java
100 lines
3.9 KiB
Java
/**
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* Copyright (C) 2009-2014 Typesafe Inc. <http://www.typesafe.com>
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*/
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package sample.persistence;
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import akka.actor.AbstractActor;
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import akka.actor.ActorRef;
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import akka.actor.ActorSystem;
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import akka.actor.Props;
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import akka.japi.pf.ReceiveBuilder;
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import akka.persistence.*;
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import scala.PartialFunction;
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import scala.concurrent.duration.Duration;
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import scala.runtime.BoxedUnit;
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import java.util.concurrent.TimeUnit;
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public class ViewExample {
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public static class ExampleProcessor extends AbstractProcessor {
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@Override
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public String processorId() {
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return "processor-5";
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}
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@Override public PartialFunction<Object, BoxedUnit> receive() {
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return ReceiveBuilder.
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match(Persistent.class,
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p -> System.out.println(String.format("processor received %s (sequence nr = %d)",
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p.payload(),
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p.sequenceNr()))).build();
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}
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}
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public static class ExampleView extends AbstractView {
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private final ActorRef destination = context().actorOf(Props.create(ExampleDestination.class));
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private final ActorRef channel = context().actorOf(Channel.props("channel"));
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private int numReplicated = 0;
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@Override
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public String viewId() {
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return "view-5";
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}
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@Override
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public String processorId() {
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return "processor-5";
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}
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@Override public PartialFunction<Object, BoxedUnit> receive() {
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return ReceiveBuilder.
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match(Persistent.class, p -> {
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numReplicated += 1;
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System.out.println(String.format("view received %s (sequence nr = %d, num replicated = %d)",
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p.payload(),
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p.sequenceNr(),
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numReplicated));
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channel.tell(Deliver.create(p.withPayload("replicated-" + p.payload()), destination.path()),
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self());
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}).
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match(SnapshotOffer.class, so -> {
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numReplicated = (Integer) so.snapshot();
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System.out.println(String.format("view received snapshot offer %s (metadata = %s)",
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numReplicated,
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so.metadata()));
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}).
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match(String.class, s -> s.equals("snap"), s -> saveSnapshot(numReplicated)).build();
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}
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}
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public static class ExampleDestination extends AbstractActor {
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@Override public PartialFunction<Object, BoxedUnit> receive() {
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return ReceiveBuilder.
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match(ConfirmablePersistent.class, cp -> {
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System.out.println(String.format("destination received %s (sequence nr = %s)",
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cp.payload(),
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cp.sequenceNr()));
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cp.confirm();
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}).build();
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}
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}
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public static void main(String... args) throws Exception {
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final ActorSystem system = ActorSystem.create("example");
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final ActorRef processor = system.actorOf(Props.create(ExampleProcessor.class));
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final ActorRef view = system.actorOf(Props.create(ExampleView.class));
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system.scheduler()
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.schedule(Duration.Zero(),
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Duration.create(2, TimeUnit.SECONDS),
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processor,
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Persistent.create("scheduled"),
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system.dispatcher(),
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null);
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system.scheduler()
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.schedule(Duration.Zero(), Duration.create(5, TimeUnit.SECONDS), view, "snap", system.dispatcher(), null);
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}
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}
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