| /* |
| * 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. |
| */ |
| package org.apache.camel.component.reactive.streams; |
| |
| import java.util.LinkedList; |
| import java.util.concurrent.BlockingQueue; |
| import java.util.concurrent.ConcurrentLinkedDeque; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.LinkedBlockingDeque; |
| import java.util.concurrent.ScheduledThreadPoolExecutor; |
| import java.util.concurrent.TimeUnit; |
| |
| import io.reactivex.Flowable; |
| import org.apache.camel.component.reactive.streams.engine.DelayedMonoPublisher; |
| import org.apache.camel.component.reactive.streams.support.TestSubscriber; |
| import org.junit.After; |
| import org.junit.Before; |
| import org.junit.Test; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertTrue; |
| |
| public class DelayedMonoPublisherTest { |
| |
| private ExecutorService service; |
| |
| @Before |
| public void init() { |
| service = new ScheduledThreadPoolExecutor(3); |
| } |
| |
| @After |
| public void tearDown() throws Exception { |
| service.shutdown(); |
| service.awaitTermination(1, TimeUnit.SECONDS); |
| } |
| |
| @Test |
| public void testAlreadyAvailable() throws Exception { |
| |
| DelayedMonoPublisher<Integer> pub = new DelayedMonoPublisher<>(service); |
| pub.setData(5); |
| |
| LinkedList<Integer> data = new LinkedList<>(); |
| CountDownLatch latch = new CountDownLatch(1); |
| |
| Flowable.fromPublisher(pub) |
| .doOnNext(data::add) |
| .doOnComplete(latch::countDown) |
| .subscribe(); |
| |
| assertTrue(latch.await(1, TimeUnit.SECONDS)); |
| |
| assertEquals(1, data.size()); |
| assertEquals(5, data.get(0).intValue()); |
| } |
| |
| @Test |
| public void testExceptionAlreadyAvailable() throws Exception { |
| |
| Exception ex = new RuntimeException("An exception"); |
| |
| DelayedMonoPublisher<Integer> pub = new DelayedMonoPublisher<>(service); |
| pub.setException(ex); |
| |
| LinkedList<Throwable> exceptions = new LinkedList<>(); |
| CountDownLatch latch = new CountDownLatch(1); |
| |
| Flowable.fromPublisher(pub) |
| .subscribe(item -> { |
| }, e -> { |
| exceptions.add(e); |
| latch.countDown(); |
| }); |
| |
| assertTrue(latch.await(1, TimeUnit.SECONDS)); |
| |
| assertEquals(1, exceptions.size()); |
| assertEquals(ex, exceptions.get(0)); |
| } |
| |
| @Test |
| public void testAvailableSoon() throws Exception { |
| |
| DelayedMonoPublisher<Integer> pub = new DelayedMonoPublisher<>(service); |
| |
| LinkedList<Integer> data = new LinkedList<>(); |
| CountDownLatch latch = new CountDownLatch(1); |
| |
| Flowable.fromPublisher(pub) |
| .doOnNext(data::add) |
| .doOnComplete(latch::countDown) |
| .subscribe(); |
| |
| Thread.yield(); |
| pub.setData(5); |
| |
| assertTrue(latch.await(1, TimeUnit.SECONDS)); |
| |
| assertEquals(1, data.size()); |
| assertEquals(5, data.get(0).intValue()); |
| } |
| |
| @Test |
| public void testAvailableLater() throws Exception { |
| |
| DelayedMonoPublisher<Integer> pub = new DelayedMonoPublisher<>(service); |
| |
| LinkedList<Integer> data = new LinkedList<>(); |
| CountDownLatch latch = new CountDownLatch(1); |
| |
| Flowable.fromPublisher(pub) |
| .doOnNext(data::add) |
| .doOnComplete(latch::countDown) |
| .subscribe(); |
| |
| Thread.sleep(200); |
| pub.setData(5); |
| |
| assertTrue(latch.await(1, TimeUnit.SECONDS)); |
| |
| assertEquals(1, data.size()); |
| assertEquals(5, data.get(0).intValue()); |
| } |
| |
| @Test |
| public void testMultipleSubscribers() throws Exception { |
| |
| DelayedMonoPublisher<Integer> pub = new DelayedMonoPublisher<>(service); |
| |
| ConcurrentLinkedDeque<Integer> data = new ConcurrentLinkedDeque<>(); |
| CountDownLatch latch = new CountDownLatch(2); |
| |
| Flowable.fromPublisher(pub) |
| .doOnNext(data::add) |
| .doOnComplete(latch::countDown) |
| .subscribe(); |
| |
| Flowable.fromPublisher(pub) |
| .doOnNext(data::add) |
| .doOnComplete(latch::countDown) |
| .subscribe(); |
| |
| Thread.sleep(200); |
| pub.setData(5); |
| |
| assertTrue(latch.await(1, TimeUnit.SECONDS)); |
| |
| assertEquals(2, data.size()); |
| for (Integer n : data) { |
| assertEquals(5, n.intValue()); |
| } |
| } |
| |
| @Test |
| public void testMultipleSubscribersMixedArrival() throws Exception { |
| |
| DelayedMonoPublisher<Integer> pub = new DelayedMonoPublisher<>(service); |
| |
| ConcurrentLinkedDeque<Integer> data = new ConcurrentLinkedDeque<>(); |
| CountDownLatch latch = new CountDownLatch(2); |
| |
| Flowable.fromPublisher(pub) |
| .doOnNext(data::add) |
| .doOnComplete(latch::countDown) |
| .subscribe(); |
| |
| Thread.sleep(200); |
| pub.setData(5); |
| |
| Flowable.fromPublisher(pub) |
| .doOnNext(data::add) |
| .doOnComplete(latch::countDown) |
| .subscribe(); |
| |
| assertTrue(latch.await(1, TimeUnit.SECONDS)); |
| |
| assertEquals(2, data.size()); |
| for (Integer n : data) { |
| assertEquals(5, n.intValue()); |
| } |
| } |
| |
| @Test |
| public void testMultipleSubscribersMixedArrivalException() throws Exception { |
| |
| DelayedMonoPublisher<Integer> pub = new DelayedMonoPublisher<>(service); |
| |
| Exception ex = new RuntimeException("An exception"); |
| |
| ConcurrentLinkedDeque<Throwable> exceptions = new ConcurrentLinkedDeque<>(); |
| CountDownLatch latch = new CountDownLatch(2); |
| |
| Flowable.fromPublisher(pub) |
| .subscribe(item -> { |
| }, e -> { |
| exceptions.add(e); |
| latch.countDown(); |
| }); |
| |
| Thread.sleep(200); |
| pub.setException(ex); |
| |
| Flowable.fromPublisher(pub) |
| .subscribe(item -> { |
| }, e -> { |
| exceptions.add(e); |
| latch.countDown(); |
| }); |
| |
| assertTrue(latch.await(1, TimeUnit.SECONDS)); |
| |
| assertEquals(2, exceptions.size()); |
| for (Throwable t : exceptions) { |
| assertEquals(ex, t); |
| } |
| } |
| |
| @Test |
| public void testDelayedRequest() throws Exception { |
| |
| DelayedMonoPublisher<Integer> pub = new DelayedMonoPublisher<>(service); |
| pub.setData(2); |
| |
| BlockingQueue<Integer> queue = new LinkedBlockingDeque<>(); |
| |
| TestSubscriber<Integer> sub = new TestSubscriber<Integer>() { |
| @Override |
| public void onNext(Integer o) { |
| queue.add(o); |
| } |
| }; |
| sub.setInitiallyRequested(0); |
| |
| pub.subscribe(sub); |
| |
| Thread.sleep(100); |
| sub.request(1); |
| |
| Integer res = queue.poll(1, TimeUnit.SECONDS); |
| assertEquals(new Integer(2), res); |
| } |
| |
| @Test(expected = IllegalStateException.class) |
| public void testDataOrExceptionAllowed() throws Exception { |
| DelayedMonoPublisher<Integer> pub = new DelayedMonoPublisher<>(service); |
| Exception ex = new RuntimeException("An exception"); |
| pub.setException(ex); |
| pub.setData(1); |
| } |
| |
| @Test(expected = IllegalStateException.class) |
| public void testDataOrExceptionAllowed2() throws Exception { |
| DelayedMonoPublisher<Integer> pub = new DelayedMonoPublisher<>(service); |
| pub.setData(1); |
| Exception ex = new RuntimeException("An exception"); |
| pub.setException(ex); |
| } |
| |
| @Test(expected = IllegalStateException.class) |
| public void testOnlyOneDataAllowed() throws Exception { |
| DelayedMonoPublisher<Integer> pub = new DelayedMonoPublisher<>(service); |
| pub.setData(1); |
| pub.setData(2); |
| } |
| |
| @Test(expected = IllegalStateException.class) |
| public void testOnlyOneExceptionAllowed() throws Exception { |
| DelayedMonoPublisher<Integer> pub = new DelayedMonoPublisher<>(service); |
| pub.setException(new RuntimeException("An exception")); |
| pub.setException(new RuntimeException("An exception")); |
| } |
| |
| } |