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#19440 replace Scala Future usage with CompletionStage in javadsl

Browse source 
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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27
akka-docs/rst/java/code/docs/stream/FlowErrorDocTest.java
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@ -6,6 +6,7 @@ package docs.stream;
import static org.junit.Assert.assertEquals;
import java.util.Arrays;
import java.util.List;
import java.util.concurrent.CompletionStage;
import java.util.concurrent.TimeUnit;
import akka.NotUsed;
@ -49,14 +50,14 @@ public class FlowErrorDocTest {
final Materializer mat = ActorMaterializer.create(system);
final Source<Integer, NotUsed> source = Source.from(Arrays.asList(0, 1, 2, 3, 4, 5))
.map(elem -> 100 / elem);
final Sink<Integer, Future<Integer>> fold =
Sink.fold(0, (acc, elem) -> acc + elem);
final Future<Integer> result = source.runWith(fold, mat);
final Sink<Integer, CompletionStage<Integer>> fold =
Sink.<Integer, Integer> fold(0, (acc, elem) -> acc + elem);
final CompletionStage<Integer> result = source.runWith(fold, mat);
// division by zero will fail the stream and the
// result here will be a Future completed with Failure(ArithmeticException)
//#stop
Await.result(result, Duration.create(3, TimeUnit.SECONDS));
result.toCompletableFuture().get(3, TimeUnit.SECONDS);
}
@Test
@ -73,14 +74,14 @@ public class FlowErrorDocTest {
system);
final Source<Integer, NotUsed> source = Source.from(Arrays.asList(0, 1, 2, 3, 4, 5))
.map(elem -> 100 / elem);
final Sink<Integer, Future<Integer>> fold =
final Sink<Integer, CompletionStage<Integer>> fold =
Sink.fold(0, (acc, elem) -> acc + elem);
final Future<Integer> result = source.runWith(fold, mat);
final CompletionStage<Integer> result = source.runWith(fold, mat);
// the element causing division by zero will be dropped
// result here will be a Future completed with Success(228)
//#resume
assertEquals(Integer.valueOf(228), Await.result(result, Duration.create(3, TimeUnit.SECONDS)));
assertEquals(Integer.valueOf(228), result.toCompletableFuture().get(3, TimeUnit.SECONDS));
}
@Test
@ -98,14 +99,14 @@ public class FlowErrorDocTest {
.withAttributes(ActorAttributes.withSupervisionStrategy(decider));
final Source<Integer, NotUsed> source = Source.from(Arrays.asList(0, 1, 2, 3, 4, 5))
.via(flow);
final Sink<Integer, Future<Integer>> fold =
Sink.fold(0, (acc, elem) -> acc + elem);
final Future<Integer> result = source.runWith(fold, mat);
final Sink<Integer, CompletionStage<Integer>> fold =
Sink.<Integer, Integer> fold(0, (acc, elem) -> acc + elem);
final CompletionStage<Integer> result = source.runWith(fold, mat);
// the elements causing division by zero will be dropped
// result here will be a Future completed with Success(150)
//#resume-section
assertEquals(Integer.valueOf(150), Await.result(result, Duration.create(3, TimeUnit.SECONDS)));
assertEquals(Integer.valueOf(150), result.toCompletableFuture().get(3, TimeUnit.SECONDS));
}
@Test
@ -126,7 +127,7 @@ public class FlowErrorDocTest {
.withAttributes(ActorAttributes.withSupervisionStrategy(decider));
final Source<Integer, NotUsed> source = Source.from(Arrays.asList(1, 3, -1, 5, 7))
.via(flow);
final Future<List<Integer>> result = source.grouped(1000)
final CompletionStage<List<Integer>> result = source.grouped(1000)
.runWith(Sink.<List<Integer>>head(), mat);
// the negative element cause the scan stage to be restarted,
// i.e. start from 0 again
@ -135,7 +136,7 @@ public class FlowErrorDocTest {
assertEquals(
Arrays.asList(0, 1, 4, 0, 5, 12),
Await.result(result, Duration.create(3, TimeUnit.SECONDS)));
result.toCompletableFuture().get(3, TimeUnit.SECONDS));
}
}