Examples with MultiEmitter io.smallrye.mutiny.subscription.MultiEmitter used on opensource projects

Example 11 with MultiEmitter

use of io.smallrye.mutiny.subscription.MultiEmitter in project smallrye-mutiny by smallrye.

the class MultiCreateFromEmitterTest method testWithDropBackPressure.

@Test
public void testWithDropBackPressure() {
    AssertSubscriber<Integer> subscriber = Multi.createFrom().<Integer>emitter(emitter -> {
        IntStream.range(0, 1000).forEach(emitter::emit);
        emitter.complete();
    }, BackPressureStrategy.DROP).subscribe().withSubscriber(AssertSubscriber.create(20)).request(Long.MAX_VALUE).assertCompleted();
    // 20 because the 20 first are consumed, others are dropped
    assertThat(subscriber.getItems()).hasSize(20);
    subscriber = Multi.createFrom().<Integer>emitter(emitter -> {
        IntStream.range(0, 1000).forEach(emitter::emit);
        emitter.complete();
    }, BackPressureStrategy.DROP).subscribe().withSubscriber(AssertSubscriber.create()).request(20).request(Long.MAX_VALUE).assertCompleted();
    assertThat(subscriber.getItems()).isEmpty();
    Multi.createFrom().<Integer>emitter(MultiEmitter::complete, BackPressureStrategy.DROP).subscribe().withSubscriber(AssertSubscriber.create(20)).assertCompleted().assertHasNotReceivedAnyItem();
    Multi.createFrom().<Integer>emitter(emitter -> {
        IntStream.range(0, 1000).forEach(emitter::emit);
        emitter.fail(new IOException("boom"));
    }, BackPressureStrategy.DROP).subscribe().withSubscriber(AssertSubscriber.create()).request(20).request(Long.MAX_VALUE).assertFailedWith(IOException.class, "boom").assertHasNotReceivedAnyItem();
}

Example 12 with MultiEmitter

use of io.smallrye.mutiny.subscription.MultiEmitter in project smallrye-mutiny by smallrye.

the class MultiCreateFromEmitterTest method testWithMoreRequestsThanValue.

@Test
public void testWithMoreRequestsThanValue() {
    AtomicInteger terminated = new AtomicInteger();
    AtomicReference<MultiEmitter<? super Integer>> reference = new AtomicReference<>();
    Multi.createFrom().<Integer>emitter(emitter -> {
        reference.set(emitter);
        emitter.onTermination(terminated::incrementAndGet);
        emitter.emit(1);
        emitter.emit(2);
        emitter.emit(3);
        emitter.complete();
    }).subscribe().withSubscriber(AssertSubscriber.create()).assertSubscribed().run(() -> {
        assertThat(reference.get()).isNotNull();
        assertThat(reference.get().requested()).isEqualTo(0);
    }).request(2).run(() -> {
        // Already emitted
        assertThat(reference.get().requested()).isEqualTo(0);
    }).assertNotTerminated().assertItems(1, 2).request(10).assertItems(1, 2, 3).run(() -> {
        assertThat(reference.get().requested()).isEqualTo(10);
    }).assertCompleted();
    assertThat(terminated).hasValue(1);
}

Example 13 with MultiEmitter

use of io.smallrye.mutiny.subscription.MultiEmitter in project smallrye-mutiny by smallrye.

the class MultiCreateFromEmitterTest method testWithRequests.

@Test
public void testWithRequests() {
    AtomicInteger terminated = new AtomicInteger();
    AtomicReference<MultiEmitter<? super Integer>> reference = new AtomicReference<>();
    Multi.createFrom().<Integer>emitter(emitter -> {
        reference.set(emitter);
        emitter.onTermination(terminated::incrementAndGet);
        emitter.emit(1);
        emitter.emit(2);
        emitter.emit(3);
        emitter.complete();
    }).subscribe().withSubscriber(AssertSubscriber.create()).assertSubscribed().run(() -> {
        assertThat(reference.get()).isNotNull();
        assertThat(reference.get().requested()).isEqualTo(0);
    }).request(2).run(() -> {
        // Already emitted
        assertThat(reference.get().requested()).isEqualTo(0);
    }).assertNotTerminated().assertItems(1, 2).request(2).assertItems(1, 2, 3).assertCompleted();
    assertThat(terminated).hasValue(1);
}

Example 14 with MultiEmitter

use of io.smallrye.mutiny.subscription.MultiEmitter in project smallrye-mutiny by smallrye.

the class MultiOnOverflowTest method testDropCallFailedUni.

@Test
public void testDropCallFailedUni() {
    AssertSubscriber<Integer> sub = AssertSubscriber.create();
    AtomicReference<MultiEmitter<? super Integer>> emitter = new AtomicReference<>();
    Multi<Integer> multi = Multi.createFrom().emitter((Consumer<MultiEmitter<? super Integer>>) emitter::set).onOverflow().call(item -> Uni.createFrom().failure(new IOException("boom :: " + item))).drop();
    multi.subscribe(sub);
    emitter.get().emit(1);
    sub.assertFailedWith(IOException.class, "boom :: 1");
}

Example 15 with MultiEmitter

use of io.smallrye.mutiny.subscription.MultiEmitter in project smallrye-mutiny by smallrye.

the class MultiCreateFromEmitterTest method testWithLatestBackPressure.

@Test
public void testWithLatestBackPressure() {
    AssertSubscriber<Integer> subscriber = Multi.createFrom().<Integer>emitter(emitter -> {
        IntStream.range(0, 1000).forEach(emitter::emit);
        emitter.complete();
    }, BackPressureStrategy.LATEST).subscribe().withSubscriber(AssertSubscriber.create(20)).request(Long.MAX_VALUE).assertCompleted();
    // 21 because the 20 first are consumed, and then only the latest is kept.
    assertThat(subscriber.getItems()).hasSize(21);
    subscriber = Multi.createFrom().<Integer>emitter(emitter -> {
        IntStream.range(0, 1000).forEach(emitter::emit);
        emitter.complete();
    }, BackPressureStrategy.LATEST).subscribe().withSubscriber(AssertSubscriber.create()).request(20).request(Long.MAX_VALUE).assertCompleted();
    assertThat(subscriber.getItems()).hasSize(1).containsExactly(999);
    Multi.createFrom().<Integer>emitter(MultiEmitter::complete, BackPressureStrategy.LATEST).subscribe().withSubscriber(AssertSubscriber.create(20)).assertCompleted().assertHasNotReceivedAnyItem();
    subscriber = Multi.createFrom().<Integer>emitter(emitter -> {
        IntStream.range(0, 1000).forEach(emitter::emit);
        emitter.fail(new IOException("boom"));
    }, BackPressureStrategy.LATEST).subscribe().withSubscriber(AssertSubscriber.create()).request(20).request(Long.MAX_VALUE).assertFailedWith(IOException.class, "boom");
    assertThat(subscriber.getItems()).hasSize(1).containsExactly(999);
}