@Test
public void testWorksWithTwoSubscribersViaEmitter() throws InterruptedException {
AeronProcessor processor = AeronProcessor.create(createContext());
Flux.just(Buffer.wrap("Live"), Buffer.wrap("Hard"), Buffer.wrap("Die"), Buffer.wrap("Harder"))
.subscribe(processor);
FluxProcessor<Buffer, Buffer> emitter = EmitterProcessor.create();
processor.subscribe(emitter);
TestSubscriber<String> subscriber1 = TestSubscriber.create();
Buffer.bufferToString(emitter).subscribe(subscriber1);
TestSubscriber<String> subscriber2 = TestSubscriber.create();
Buffer.bufferToString(emitter).subscribe(subscriber2);
subscriber1.awaitAndAssertNextValues("Live", "Hard", "Die", "Harder").assertComplete();
subscriber2.awaitAndAssertNextValues("Live", "Hard", "Die", "Harder").assertComplete();
}
@Test
public void testRemotePublisherReceivesErrorBeforeProcessorIsShutdown()
throws InterruptedException {
AeronProcessor processor = AeronProcessor.create(createContext());
Flux.<Buffer>error(new Exception("Oops!")).subscribe(processor);
TestSubscriber<String> subscriber = TestSubscriber.create(0);
Buffer.bufferToString(processor).subscribe(subscriber);
AeronFlux remotePublisher = new AeronFlux(createContext());
TestSubscriber<String> remoteSubscriber = TestSubscriber.create(0);
Buffer.bufferToString(remotePublisher).subscribe(remoteSubscriber);
subscriber.request(1);
remoteSubscriber.request(1);
subscriber.await(TIMEOUT).assertError();
remoteSubscriber.await(TIMEOUT).assertError();
}
@Test
public void testRemotePublisherReceivesCompleteBeforeProcessorIsShutdown()
throws InterruptedException {
AeronProcessor processor = AeronProcessor.create(createContext());
Flux.just(Buffer.wrap("Live")).subscribe(processor);
TestSubscriber<String> subscriber = TestSubscriber.create(0);
Buffer.bufferToString(processor).subscribe(subscriber);
AeronFlux remotePublisher = new AeronFlux(createContext());
TestSubscriber<String> remoteSubscriber = TestSubscriber.create(0);
Buffer.bufferToString(remotePublisher).subscribe(remoteSubscriber);
subscriber.request(1);
remoteSubscriber.request(1);
subscriber.awaitAndAssertNextValues("Live").assertComplete();
remoteSubscriber.awaitAndAssertNextValues("Live").assertComplete();
}
@Test
public void testExceptionWithNullMessageIsHandled() throws InterruptedException {
AeronProcessor processor = AeronProcessor.create(createContext());
TestSubscriber<String> subscriber = TestSubscriber.create();
Buffer.bufferToString(processor).subscribe(subscriber);
Flux<Buffer> sourceStream = Flux.error(new RuntimeException());
sourceStream.subscribe(processor);
subscriber.await(TIMEOUT).assertErrorWith(t -> assertThat(t.getMessage(), is("")));
}
@Test
public void testCompleteSignalIsReceived() throws InterruptedException {
AeronProcessor processor = AeronProcessor.create(createContext());
Flux.just(Buffer.wrap("One"), Buffer.wrap("Two"), Buffer.wrap("Three")).subscribe(processor);
TestSubscriber<String> subscriber = TestSubscriber.create(0);
Buffer.bufferToString(processor).subscribe(subscriber);
subscriber.request(1);
subscriber.awaitAndAssertNextValues("One");
subscriber.request(1);
subscriber.awaitAndAssertNextValues("Two");
subscriber.request(1);
subscriber.awaitAndAssertNextValues("Three").assertComplete();
}
@Test
public void testClientReceivesException() throws InterruptedException {
AeronProcessor processor = AeronProcessor.create(createContext());
// as error is delivered on a different channelId compared to signal
// its delivery could shutdown the processor before the processor subscriber
// receives signal
Flux.concat(
Flux.just(Buffer.wrap("Item")),
Flux.error(new RuntimeException("Something went wrong")))
.subscribe(processor);
TestSubscriber<String> subscriber = TestSubscriber.create();
Buffer.bufferToString(processor).subscribe(subscriber);
subscriber
.await(TIMEOUT)
.assertErrorWith(t -> assertThat(t.getMessage(), is("Something went wrong")));
}
@Test
public void testNextSignalIsReceived() throws InterruptedException {
AeronProcessor processor = AeronProcessor.create(createContext());
TestSubscriber<String> subscriber = TestSubscriber.create(0);
Buffer.bufferToString(processor).subscribe(subscriber);
subscriber.request(4);
Flux.just(
Buffer.wrap("Live"),
Buffer.wrap("Hard"),
Buffer.wrap("Die"),
Buffer.wrap("Harder"),
Buffer.wrap("Extra"))
.subscribe(processor);
subscriber.awaitAndAssertNextValues("Live", "Hard", "Die", "Harder");
subscriber.request(1);
subscriber.awaitAndAssertNextValues("Extra");
subscriber.await();
}
@Test
public void testCancelsUpstreamSubscriptionWhenLastSubscriptionIsCancelledAndAutoCancel()
throws InterruptedException {
AeronProcessor processor = AeronProcessor.create(createContext().autoCancel(true));
final CountDownLatch subscriptionCancelledLatch = new CountDownLatch(1);
Publisher<Buffer> dataPublisher =
new Publisher<Buffer>() {
@Override
public void subscribe(Subscriber<? super Buffer> subscriber) {
subscriber.onSubscribe(
new Subscription() {
@Override
public void request(long n) {
System.out.println("Requested: " + n);
}
@Override
public void cancel() {
System.out.println("Upstream subscription cancelled");
subscriptionCancelledLatch.countDown();
}
});
}
};
dataPublisher.subscribe(processor);
TestSubscriber<String> client = TestSubscriber.create();
Buffer.bufferToString(processor).subscribe(client);
processor.onNext(Buffer.wrap("Hello"));
client.awaitAndAssertNextValues("Hello").cancel();
assertTrue(
"Subscription wasn't cancelled",
subscriptionCancelledLatch.await(TIMEOUT.getSeconds(), TimeUnit.SECONDS));
}