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eventsByTag and currentEventsByTag to use Offset (#21615)

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* EventsByTagQuery2 and CurrentEventsByTagQuery2 to keep binary compatibility
This commit is contained in:
Richard Imaoka 2016-10-17 23:45:27 +09:00 • committed by Patrik Nordwall
parent c3abde60d5
commit 375c032604
17 changed files with 247 additions and 64 deletions
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47
akka-docs/rst/java/code/docs/persistence/PersistenceQueryDocTest.java
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@ -7,40 +7,26 @@ package docs.persistence;
import static akka.pattern.PatternsCS.ask;
import java.util.HashSet;
import java.util.Set;
import java.util.Iterator;
import akka.NotUsed;
import akka.persistence.query.Sequence;
import akka.persistence.query.Offset;
import com.typesafe.config.Config;
import akka.actor.*;
import akka.dispatch.Mapper;
import akka.event.EventStreamSpec;
import akka.japi.Function;
import akka.japi.Procedure;
import akka.japi.pf.ReceiveBuilder;
import akka.pattern.BackoffSupervisor;
import akka.persistence.*;
import akka.persistence.query.*;
import akka.persistence.query.javadsl.ReadJournal;
import akka.stream.ActorMaterializer;
import akka.stream.javadsl.Sink;
import akka.stream.javadsl.Source;
import akka.util.Timeout;
import docs.persistence.query.MyEventsByTagPublisher;
import docs.persistence.query.PersistenceQueryDocSpec;
import org.reactivestreams.Subscriber;
import scala.collection.Seq;
import scala.collection.immutable.Vector;
import scala.concurrent.Await;
import scala.concurrent.Future;
import scala.concurrent.duration.Duration;
import scala.concurrent.duration.FiniteDuration;
import scala.runtime.Boxed;
import scala.runtime.BoxedUnit;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.concurrent.CompletionStage;
import java.util.concurrent.TimeUnit;
@ -102,11 +88,11 @@ public class PersistenceQueryDocTest {
//#my-read-journal
public class MyJavadslReadJournal implements
akka.persistence.query.javadsl.ReadJournal,
akka.persistence.query.javadsl.EventsByTagQuery,
akka.persistence.query.javadsl.EventsByTagQuery2,
akka.persistence.query.javadsl.EventsByPersistenceIdQuery,
akka.persistence.query.javadsl.AllPersistenceIdsQuery,
akka.persistence.query.javadsl.CurrentPersistenceIdsQuery {
private final FiniteDuration refreshInterval;
public MyJavadslReadJournal(ExtendedActorSystem system, Config config) {
@ -116,10 +102,15 @@ public class PersistenceQueryDocTest {
}
@Override
public Source<EventEnvelope, NotUsed> eventsByTag(String tag, long offset) {
final Props props = MyEventsByTagPublisher.props(tag, offset, refreshInterval);
return Source.<EventEnvelope>actorPublisher(props).
public Source<EventEnvelope, NotUsed> eventsByTag(String tag, Offset offset) {
if(offset instanceof Sequence){
Sequence sequenceOffset = (Sequence) offset;
final Props props = MyEventsByTagPublisher.props(tag, sequenceOffset.value(), refreshInterval);
return Source.<EventEnvelope>actorPublisher(props).
mapMaterializedValue(m -> NotUsed.getInstance());
}
else
throw new IllegalArgumentException("MyJavadslReadJournal does not support " + offset.getClass().getName() + " offsets");
}
@Override
@ -157,7 +148,7 @@ public class PersistenceQueryDocTest {
//#my-read-journal
public class MyScaladslReadJournal implements
akka.persistence.query.scaladsl.ReadJournal,
akka.persistence.query.scaladsl.EventsByTagQuery,
akka.persistence.query.scaladsl.EventsByTagQuery2,
akka.persistence.query.scaladsl.EventsByPersistenceIdQuery,
akka.persistence.query.scaladsl.AllPersistenceIdsQuery,
akka.persistence.query.scaladsl.CurrentPersistenceIdsQuery {
@ -170,7 +161,7 @@ public class PersistenceQueryDocTest {
@Override
public akka.stream.scaladsl.Source<EventEnvelope, NotUsed> eventsByTag(
String tag, long offset) {
String tag, akka.persistence.query.Offset offset) {
return javadslReadJournal.eventsByTag(tag, offset).asScala();
}
@ -266,7 +257,7 @@ public class PersistenceQueryDocTest {
//#events-by-tag
// assuming journal is able to work with numeric offsets we can:
final Source<EventEnvelope, NotUsed> blueThings =
readJournal.eventsByTag("blue", 0L);
readJournal.eventsByTag("blue", new Sequence(0L));
// find top 10 blue things:
final Future<List<Object>> top10BlueThings =
@ -279,7 +270,7 @@ public class PersistenceQueryDocTest {
}, mat);
// start another query, from the known offset
Source<EventEnvelope, NotUsed> blue = readJournal.eventsByTag("blue", 10);
Source<EventEnvelope, NotUsed> blue = readJournal.eventsByTag("blue", new Sequence(10));
//#events-by-tag
}
@ -366,7 +357,7 @@ public class PersistenceQueryDocTest {
final ExampleStore store = new ExampleStore();
readJournal
.eventsByTag("bid", 0L)
.eventsByTag("bid", new Sequence(0L))
.mapAsync(1, store::save)
.runWith(Sink.ignore(), mat);
//#projection-into-different-store-simple
@ -416,7 +407,7 @@ public class PersistenceQueryDocTest {
long startFromOffset = bidProjection.latestOffset().toCompletableFuture().get(3, TimeUnit.SECONDS);
readJournal
.eventsByTag("bid", startFromOffset)
.eventsByTag("bid", new Sequence(startFromOffset))
.mapAsync(8, envelope -> {
final CompletionStage<Object> f = ask(writer, envelope.event(), timeout);
return f.thenApplyAsync(in -> envelope.offset(), system.dispatcher());