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#19440 replace Scala Future usage with CompletionStage in javadsl

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This entails:

  * adding akka.pattern.PatternCS.* to enable ask etc. with
    CompletionStage
  * changing RequestContext to offer an ExecutionContextExecutor for the
    CompletionStage.*Async combinators
  * splitting up akka.stream.Queue for JavaDSL consistency
This commit is contained in:
Roland Kuhn 2016-01-21 16:37:26 +01:00
parent 396f4370e9
commit 4c72495581
118 changed files with 1646 additions and 1379 deletions
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21
akka-docs/rst/java/code/docs/persistence/PersistenceQueryDocTest.java
View file

@ -4,7 +4,7 @@
package docs.persistence;
import static akka.pattern.Patterns.ask;
import static akka.pattern.PatternsCS.ask;
import java.util.HashSet;
import java.util.Set;
import java.util.Iterator;
@ -42,6 +42,7 @@ 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;
public class PersistenceQueryDocTest {
@ -343,7 +344,7 @@ public class PersistenceQueryDocTest {
//#projection-into-different-store-simple-classes
class ExampleStore {
Future<Void> save(Object any) {
CompletionStage<Void> save(Object any) {
// ...
//#projection-into-different-store-simple-classes
return null;
@ -379,13 +380,13 @@ public class PersistenceQueryDocTest {
this.name = name;
}
public Future<Long> saveProgress(long offset) {
public CompletionStage<Long> saveProgress(long offset) {
// ...
//#projection-into-different-store
return null;
//#projection-into-different-store
}
public Future<Long> latestOffset() {
public CompletionStage<Long> latestOffset() {
// ...
//#projection-into-different-store
return null;
@ -412,17 +413,13 @@ public class PersistenceQueryDocTest {
final Props writerProps = Props.create(TheOneWhoWritesToQueryJournal.class, "bid");
final ActorRef writer = system.actorOf(writerProps, "bid-projection-writer");
long startFromOffset = Await.result(bidProjection.latestOffset(), timeout.duration());
long startFromOffset = bidProjection.latestOffset().toCompletableFuture().get(3, TimeUnit.SECONDS);
readJournal
.eventsByTag("bid", startFromOffset)
.<Long>mapAsync(8, envelope -> {
final Future<Object> f = ask(writer, envelope.event(), timeout);
return f.<Long>map(new Mapper<Object, Long>() {
@Override public Long apply(Object in) {
return envelope.offset();
}
}, system.dispatcher());
.mapAsync(8, envelope -> {
final CompletionStage<Object> f = ask(writer, envelope.event(), timeout);
return f.thenApplyAsync(in -> envelope.offset(), system.dispatcher());
})
.mapAsync(1, offset -> bidProjection.saveProgress(offset))
.runWith(Sink.ignore(), mat);