示例#1
0
  @Test
  public void mustBeAbleToRecover() throws Exception {
    final ManualProbe<Integer> publisherProbe = TestPublisher.manualProbe(true, system);
    final JavaTestKit probe = new JavaTestKit(system);

    final Source<Integer, NotUsed> source =
        Source.fromPublisher(publisherProbe)
            .map(
                elem -> {
                  if (elem == 1) throw new RuntimeException("ex");
                  else return elem;
                })
            .recover(new PFBuilder<Throwable, Integer>().matchAny(ex -> 0).build());

    final CompletionStage<Done> future =
        source.runWith(
            Sink.foreach(elem -> probe.getRef().tell(elem, ActorRef.noSender())), materializer);
    final PublisherProbeSubscription<Integer> s = publisherProbe.expectSubscription();
    s.sendNext(0);
    probe.expectMsgEquals(0);
    s.sendNext(1);
    probe.expectMsgEquals(0);

    future.toCompletableFuture().get(200, TimeUnit.MILLISECONDS);
  }
示例#2
0
  public void demonstrateADetachedGraphStage() throws Exception {
    // tests:
    CompletionStage<Integer> result1 =
        Source.from(Arrays.asList(1, 2, 3))
            .via(new TwoBuffer<>())
            .runFold(0, (acc, n) -> acc + n, mat);

    assertEquals(new Integer(6), result1.toCompletableFuture().get(3, TimeUnit.SECONDS));

    TestSubscriber.ManualProbe<Integer> subscriber = TestSubscriber.manualProbe(system);
    TestPublisher.Probe<Integer> publisher = TestPublisher.probe(0, system);
    RunnableGraph<NotUsed> flow2 =
        Source.fromPublisher(publisher).via(new TwoBuffer<>()).to(Sink.fromSubscriber(subscriber));

    flow2.run(mat);

    Subscription sub = subscriber.expectSubscription();
    // this happens even though the subscriber has not signalled any demand
    publisher.sendNext(1);
    publisher.sendNext(2);

    sub.cancel();
  }