Java SingleSubject类代码示例

import io.reactivex.subjects.SingleSubject; //导入依赖的package包/类
@Override
public <T> Single<T> sendRequest(SqsAction<T> action) {
    Request asyncRequest = action.toHttpRequest(credentialsProvider.getCredentials());
    SingleSubject<T> responseSubject = SingleSubject.create();
    httpClient.executeRequest(asyncRequest, new AsyncCompletionHandler<Response>() {
        @Override
        public Response onCompleted(Response httpResponse) {
            Single.fromCallable(() -> action.parseHttpResponse(httpResponse))
                    .subscribeWith(responseSubject);
            return httpResponse;
        }

        @Override
        public void onThrowable(Throwable throwable) {
            responseSubject.onError(throwable);
        }
    });
    return responseSubject;
}
 

import io.reactivex.subjects.SingleSubject; //导入依赖的package包/类
@Test
public void testShutdownWithPendingPermits() {
    SingleSubject<List<SqsMessage<String>>> singleSubject = SingleSubject.create();

    when(sqsQueueMock.deleteMessage(any(String.class))).thenReturn(Completable.complete());
    when(sqsQueueMock.receiveMessages(anyInt(), any(Optional.class))).thenReturn(singleSubject);

    consumer.setMessageBuffer(messageBufferSmall);
    consumer.processNextMessage(consumer.getNextMessage());

    //handler does not ack here, so permits will be pending forever

    Completable shutdownCompletable = consumer.shutdownAsync();
    singleSubject.onSuccess(Collections.emptyList());

    shutdownCompletable.test().assertNotComplete();
}
 

import io.reactivex.subjects.SingleSubject; //导入依赖的package包/类
@Test
public void testHandlerDeleteAndShutdown() {
    SingleSubject<List<SqsMessage<String>>> singleSubject = SingleSubject.create();

    when(sqsQueueMock.deleteMessage(any(String.class))).thenReturn(Completable.complete());
    when(sqsQueueMock.receiveMessages(anyInt(), any(Optional.class))).thenReturn(singleSubject);

    doAnswer((invocation -> {
        ((MessageAcknowledger) invocation.getArgument(1)).delete();
        return null;
    })).when(consumerHandlerMock).handleMessage(any(), any());

    consumer.setMessageBuffer(messageBufferSmall);
    consumer.processNextMessage(consumer.getNextMessage());
    Completable shutdownCompletable = consumer.shutdownAsync();
    singleSubject.onSuccess(Collections.emptyList());

    shutdownCompletable.test().assertComplete();
    verify(sqsQueueMock).deleteMessage(any(String.class));
}
 

import io.reactivex.subjects.SingleSubject; //导入依赖的package包/类
@Test
public void testHandlerIgnoreAndShutdown() {
    SingleSubject<List<SqsMessage<String>>> singleSubject = SingleSubject.create();

    when(sqsQueueMock.deleteMessage(any(String.class))).thenReturn(Completable.complete());
    when(sqsQueueMock.receiveMessages(anyInt(), any(Optional.class))).thenReturn(singleSubject);

    doAnswer((invocation -> {
        ((MessageAcknowledger) invocation.getArgument(1)).ignore();
        return null;
    })).when(consumerHandlerMock).handleMessage(any(), any());

    consumer.setMessageBuffer(messageBufferSmall);
    consumer.processNextMessage(consumer.getNextMessage());
    Completable shutdownCompletable = consumer.shutdownAsync();
    singleSubject.onSuccess(Collections.emptyList());

    shutdownCompletable.test().assertComplete();
    verify(sqsQueueMock, never()).deleteMessage(any(String.class));
}
 

import io.reactivex.subjects.SingleSubject; //导入依赖的package包/类
@Test public void test() {
    SingleSubject<String> subject = SingleSubject.create();
    Single<String> singleSource = subject.hide();


    TestObserver testObserver = new TestObserver();
    CompositeDisposable composite = new CompositeDisposable();
    Disposable disposable = singleSource
            .compose(DisposableAttach.<String>to(composite))
            .subscribeWith(testObserver);

    subject.onSuccess("Foo");
    testObserver.assertValue("Foo");
    assertTrue(composite.size() == 1);
    composite.dispose();
    assertTrue(composite.size() == 0);
    assertTrue(composite.isDisposed());
    assertTrue(disposable.isDisposed());
    assertTrue(testObserver.isDisposed());
}
 

import io.reactivex.subjects.SingleSubject; //导入依赖的package包/类
/**
 * Returns a Single that emits the value of the CompletionStage, its error or
 * NoSuchElementException if it signals null.
 * @param <T> the value type
 * @param future the source CompletionStage instance
 * @return the new Completable instance
 */
public static <T> Single<T> fromFuture(CompletionStage<T> future) {
    SingleSubject<T> cs = SingleSubject.create();

    future.whenComplete((v, e) -> {
        if (e != null) {
            cs.onError(e);
        } else 
        if (v != null) {
            cs.onSuccess(v);
        } else {
            cs.onError(new NoSuchElementException());
        }
    });

    return cs;
}
 

import io.reactivex.subjects.SingleSubject; //导入依赖的package包/类
@Test public void autoDispose_withMaybe_normal() {
  RecordingObserver<Integer> o = new RecordingObserver<>(LOGGER);
  SingleSubject<Integer> source = SingleSubject.create();
  MaybeSubject<Integer> lifecycle = MaybeSubject.create();
  source.as(AutoDispose.<Integer>autoDisposable(lifecycle))
      .subscribe(o);
  o.takeSubscribe();

  assertThat(source.hasObservers()).isTrue();
  assertThat(lifecycle.hasObservers()).isTrue();

  // Got the event
  source.onSuccess(1);
  assertThat(o.takeSuccess()).isEqualTo(1);

  // Nothing more, lifecycle disposed too
  o.assertNoMoreEvents();
  assertThat(source.hasObservers()).isFalse();
  assertThat(lifecycle.hasObservers()).isFalse();
}
 

import io.reactivex.subjects.SingleSubject; //导入依赖的package包/类
@Test public void autoDispose_withMaybe_interrupted() {
  RecordingObserver<Integer> o = new RecordingObserver<>(LOGGER);
  SingleSubject<Integer> source = SingleSubject.create();
  MaybeSubject<Integer> lifecycle = MaybeSubject.create();
  source.as(AutoDispose.<Integer>autoDisposable(lifecycle))
      .subscribe(o);
  o.takeSubscribe();

  assertThat(source.hasObservers()).isTrue();
  assertThat(lifecycle.hasObservers()).isTrue();

  // Lifecycle ends
  lifecycle.onSuccess(2);
  assertThat(source.hasObservers()).isFalse();
  assertThat(lifecycle.hasObservers()).isFalse();

  // Event if upstream emits, no one is listening
  source.onSuccess(2);
  o.assertNoMoreEvents();
}
 

import io.reactivex.subjects.SingleSubject; //导入依赖的package包/类
@Test public void autoDispose_withProvider() {
  RecordingObserver<Integer> o = new RecordingObserver<>(LOGGER);
  SingleSubject<Integer> source = SingleSubject.create();
  MaybeSubject<Integer> scope = MaybeSubject.create();
  ScopeProvider provider = makeProvider(scope);
  source.as(AutoDispose.<Integer>autoDisposable(provider))
      .subscribe(o);
  o.takeSubscribe();

  assertThat(source.hasObservers()).isTrue();
  assertThat(scope.hasObservers()).isTrue();

  source.onSuccess(3);
  o.takeSuccess();

  // All cleaned up
  o.assertNoMoreEvents();
  assertThat(source.hasObservers()).isFalse();
  assertThat(scope.hasObservers()).isFalse();
}
 

import io.reactivex.subjects.SingleSubject; //导入依赖的package包/类
@Test public void autoDispose_withProvider_interrupted() {
  RecordingObserver<Integer> o = new RecordingObserver<>(LOGGER);
  SingleSubject<Integer> source = SingleSubject.create();
  MaybeSubject<Integer> scope = MaybeSubject.create();
  ScopeProvider provider = makeProvider(scope);
  source.as(AutoDispose.<Integer>autoDisposable(provider))
      .subscribe(o);
  o.takeSubscribe();

  assertThat(source.hasObservers()).isTrue();
  assertThat(scope.hasObservers()).isTrue();

  // Lifecycle ends
  scope.onSuccess(3);
  assertThat(source.hasObservers()).isFalse();
  assertThat(scope.hasObservers()).isFalse();

  // No one is listening even if upstream finally does emit
  source.onSuccess(3);
  o.assertNoMoreEvents();
}
 

import io.reactivex.subjects.SingleSubject; //导入依赖的package包/类
@Test public void autoDispose_withLifecycleProvider() {
  RecordingObserver<Integer> o = new RecordingObserver<>(LOGGER);
  SingleSubject<Integer> source = SingleSubject.create();
  BehaviorSubject<Integer> lifecycle = BehaviorSubject.createDefault(0);
  LifecycleScopeProvider<Integer> provider = makeLifecycleProvider(lifecycle);
  source.as(AutoDispose.<Integer>autoDisposable(provider))
      .subscribe(o);
  o.takeSubscribe();

  assertThat(source.hasObservers()).isTrue();
  assertThat(lifecycle.hasObservers()).isTrue();

  lifecycle.onNext(1);

  assertThat(source.hasObservers()).isTrue();
  assertThat(lifecycle.hasObservers()).isTrue();

  source.onSuccess(3);
  o.takeSuccess();

  // All cleaned up
  o.assertNoMoreEvents();
  assertThat(source.hasObservers()).isFalse();
  assertThat(lifecycle.hasObservers()).isFalse();
}
 

import io.reactivex.subjects.SingleSubject; //导入依赖的package包/类
@Test public void autoDispose_withLifecycleProvider_interrupted() {
  RecordingObserver<Integer> o = new RecordingObserver<>(LOGGER);
  SingleSubject<Integer> source = SingleSubject.create();
  BehaviorSubject<Integer> lifecycle = BehaviorSubject.createDefault(0);
  LifecycleScopeProvider<Integer> provider = makeLifecycleProvider(lifecycle);
  source.as(AutoDispose.<Integer>autoDisposable(provider))
      .subscribe(o);
  o.takeSubscribe();

  assertThat(source.hasObservers()).isTrue();
  assertThat(lifecycle.hasObservers()).isTrue();

  lifecycle.onNext(1);

  assertThat(source.hasObservers()).isTrue();
  assertThat(lifecycle.hasObservers()).isTrue();

  // Lifecycle ends
  lifecycle.onNext(3);
  assertThat(source.hasObservers()).isFalse();
  assertThat(lifecycle.hasObservers()).isFalse();

  // No one is listening even if upstream finally does emit
  source.onSuccess(3);
  o.assertNoMoreEvents();
}
 

import io.reactivex.subjects.SingleSubject; //导入依赖的package包/类
@Test public void autoDispose_withProviderAndNoOpPlugin_withoutStarting_shouldFailSilently() {
  AutoDisposePlugins.setOutsideLifecycleHandler(new Consumer<OutsideLifecycleException>() {
    @Override public void accept(OutsideLifecycleException e) { }
  });
  BehaviorSubject<Integer> lifecycle = BehaviorSubject.create();
  LifecycleScopeProvider<Integer> provider = TestUtil.makeLifecycleProvider(lifecycle);
  SingleSubject<Integer> source = SingleSubject.create();
  TestObserver<Integer> o = source
          .as(AutoDispose.<Integer>autoDisposable(provider))
          .test();

  assertThat(source.hasObservers()).isFalse();
  assertThat(lifecycle.hasObservers()).isFalse();
  o.assertNoValues();
  o.assertNoErrors();
}
 

import io.reactivex.subjects.SingleSubject; //导入依赖的package包/类
@Test public void autoDispose_withProviderAndNoOpPlugin_afterEnding_shouldFailSilently() {
  AutoDisposePlugins.setOutsideLifecycleHandler(new Consumer<OutsideLifecycleException>() {
    @Override public void accept(OutsideLifecycleException e) {
      // Noop
    }
  });
  BehaviorSubject<Integer> lifecycle = BehaviorSubject.createDefault(0);
  lifecycle.onNext(1);
  lifecycle.onNext(2);
  lifecycle.onNext(3);
  LifecycleScopeProvider<Integer> provider = TestUtil.makeLifecycleProvider(lifecycle);
  SingleSubject<Integer> source = SingleSubject.create();
  TestObserver<Integer> o = source
          .as(AutoDispose.<Integer>autoDisposable(provider))
          .test();

  assertThat(source.hasObservers()).isFalse();
  assertThat(lifecycle.hasObservers()).isFalse();
  o.assertNoValues();
  o.assertNoErrors();
}
 

import io.reactivex.subjects.SingleSubject; //导入依赖的package包/类
@Test public void autoDispose_withProviderAndPlugin_withoutStarting_shouldFailWithExp() {
  AutoDisposePlugins.setOutsideLifecycleHandler(new Consumer<OutsideLifecycleException>() {
    @Override public void accept(OutsideLifecycleException e) {
      // Wrap in an IllegalStateException so we can verify this is the exception we see on the
      // other side
      throw new IllegalStateException(e);
    }
  });
  BehaviorSubject<Integer> lifecycle = BehaviorSubject.create();
  LifecycleScopeProvider<Integer> provider = TestUtil.makeLifecycleProvider(lifecycle);
  SingleSubject<Integer> source = SingleSubject.create();
  TestObserver<Integer> o = source
          .as(AutoDispose.<Integer>autoDisposable(provider))
          .test();

  o.assertNoValues();
  o.assertError(new Predicate<Throwable>() {
    @Override public boolean test(Throwable throwable) {
      return throwable instanceof IllegalStateException
          && throwable.getCause() instanceof OutsideLifecycleException;
    }
  });
}