| /* |
| * ==================================================================== |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| * |
| */ |
| package org.apache.hc.core5.reactive; |
| |
| import java.nio.ByteBuffer; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.atomic.AtomicInteger; |
| import java.util.concurrent.atomic.AtomicReference; |
| |
| import org.apache.hc.core5.http.HttpStreamResetException; |
| import org.apache.hc.core5.http.nio.CapacityChannel; |
| import org.junit.Assert; |
| import org.junit.Test; |
| import org.reactivestreams.Subscriber; |
| import org.reactivestreams.Subscription; |
| |
| import io.reactivex.Flowable; |
| import io.reactivex.Notification; |
| import io.reactivex.Observable; |
| import io.reactivex.Single; |
| |
| public class TestReactiveDataConsumer { |
| |
| @Test |
| public void testStreamThatEndsNormally() throws Exception { |
| final ReactiveDataConsumer consumer = new ReactiveDataConsumer(); |
| |
| final List<ByteBuffer> output = Collections.synchronizedList(new ArrayList<>()); |
| |
| final CountDownLatch complete = new CountDownLatch(1); |
| Observable.fromPublisher(consumer) |
| .materialize() |
| .forEach(byteBufferNotification -> { |
| if (byteBufferNotification.isOnComplete()) { |
| complete.countDown(); |
| } else if (byteBufferNotification.isOnNext()) { |
| output.add(byteBufferNotification.getValue()); |
| } else { |
| throw new IllegalArgumentException(); |
| } |
| }); |
| |
| consumer.consume(ByteBuffer.wrap(new byte[]{ '1' })); |
| consumer.consume(ByteBuffer.wrap(new byte[]{ '2' })); |
| consumer.consume(ByteBuffer.wrap(new byte[]{ '3' })); |
| consumer.streamEnd(null); |
| |
| Assert.assertTrue("Stream did not finish before timeout", complete.await(1, TimeUnit.SECONDS)); |
| Assert.assertEquals(3, output.size()); |
| Assert.assertEquals(ByteBuffer.wrap(new byte[]{ '1' }), output.get(0)); |
| Assert.assertEquals(ByteBuffer.wrap(new byte[]{ '2' }), output.get(1)); |
| Assert.assertEquals(ByteBuffer.wrap(new byte[]{ '3' }), output.get(2)); |
| } |
| |
| @Test |
| public void testStreamThatEndsWithError() { |
| final ReactiveDataConsumer consumer = new ReactiveDataConsumer(); |
| final Single<List<Notification<ByteBuffer>>> single = Observable.fromPublisher(consumer) |
| .materialize() |
| .toList(); |
| |
| final Exception ex = new RuntimeException(); |
| consumer.failed(ex); |
| |
| Assert.assertSame(ex, single.blockingGet().get(0).getError()); |
| } |
| |
| @Test(expected = HttpStreamResetException.class) |
| public void testCancellation() throws Exception { |
| final ReactiveDataConsumer consumer = new ReactiveDataConsumer(); |
| consumer.subscribe(new Subscriber<ByteBuffer>() { |
| @Override |
| public void onSubscribe(final Subscription s) { |
| s.cancel(); |
| } |
| |
| @Override |
| public void onNext(final ByteBuffer byteBuffer) { |
| } |
| |
| @Override |
| public void onError(final Throwable throwable) { |
| } |
| |
| @Override |
| public void onComplete() { |
| } |
| }); |
| |
| consumer.consume(ByteBuffer.wrap(new byte[1024])); |
| } |
| |
| @Test |
| public void testCapacityIncrements() throws Exception { |
| final ReactiveDataConsumer consumer = new ReactiveDataConsumer(); |
| final ByteBuffer data = ByteBuffer.wrap(new byte[1024]); |
| |
| final AtomicInteger lastIncrement = new AtomicInteger(-1); |
| final CapacityChannel channel = lastIncrement::set; |
| consumer.updateCapacity(channel); |
| Assert.assertEquals("CapacityChannel#update should not have been invoked yet", -1, lastIncrement.get()); |
| |
| final AtomicInteger received = new AtomicInteger(0); |
| final AtomicReference<Subscription> subscription = new AtomicReference<>(); |
| consumer.subscribe(new Subscriber<ByteBuffer>() { |
| @Override |
| public void onSubscribe(final Subscription s) { |
| subscription.set(s); |
| } |
| |
| @Override |
| public void onNext(final ByteBuffer byteBuffer) { |
| received.incrementAndGet(); |
| } |
| |
| @Override |
| public void onError(final Throwable throwable) { |
| } |
| |
| @Override |
| public void onComplete() { |
| } |
| }); |
| |
| consumer.consume(data.duplicate()); |
| consumer.consume(data.duplicate()); |
| consumer.consume(data.duplicate()); |
| consumer.consume(data.duplicate()); |
| |
| subscription.get().request(1); |
| Assert.assertEquals(1024, lastIncrement.get()); |
| |
| subscription.get().request(2); |
| Assert.assertEquals(2 * 1024, lastIncrement.get()); |
| |
| subscription.get().request(99); |
| Assert.assertEquals(1024, lastIncrement.get()); |
| } |
| |
| @Test |
| public void testFullResponseBuffering() throws Exception { |
| // Due to inherent race conditions, is possible for the entire response to be buffered and completed before |
| // the Subscriber shows up. This must be handled correctly. |
| final ReactiveDataConsumer consumer = new ReactiveDataConsumer(); |
| final ByteBuffer data = ByteBuffer.wrap(new byte[1024]); |
| |
| consumer.consume(data.duplicate()); |
| consumer.consume(data.duplicate()); |
| consumer.consume(data.duplicate()); |
| consumer.streamEnd(null); |
| |
| Assert.assertEquals(Flowable.fromPublisher(consumer).count().blockingGet().longValue(), 3L); |
| } |
| |
| @Test |
| public void testErrorBuffering() throws Exception { |
| final ReactiveDataConsumer consumer = new ReactiveDataConsumer(); |
| final ByteBuffer data = ByteBuffer.wrap(new byte[1024]); |
| |
| final RuntimeException ex = new RuntimeException(); |
| consumer.consume(data.duplicate()); |
| consumer.consume(data.duplicate()); |
| consumer.consume(data.duplicate()); |
| consumer.failed(ex); |
| |
| final Notification<ByteBuffer> result = Flowable.fromPublisher(consumer) |
| .materialize() |
| .singleOrError() |
| .blockingGet(); |
| Assert.assertSame(ex, result.getError()); |
| } |
| |
| @Test |
| public void testFailAfterCompletion() { |
| // Calling consumer.failed() after consumer.streamEnd() must be a no-op. |
| // The exception must be discarded, and the subscriber must see that |
| // the stream was successfully completed. |
| final ReactiveDataConsumer consumer = new ReactiveDataConsumer(); |
| |
| consumer.streamEnd(null); |
| |
| final RuntimeException ex = new RuntimeException(); |
| consumer.failed(ex); |
| |
| final Notification<ByteBuffer> result = Flowable.fromPublisher(consumer) |
| .materialize() |
| .singleOrError() |
| .blockingGet(); |
| Assert.assertFalse(result.isOnError()); |
| Assert.assertTrue(result.isOnComplete()); |
| } |
| } |