/*
* Copyright 2016-2017 the original author or authors.
*
* Licensed 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.springframework.integration.channel.reactive;
import static org.hamcrest.Matchers.equalTo;
import static org.hamcrest.Matchers.instanceOf;
import static org.junit.Assert.assertSame;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.BDDMockito.willAnswer;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.never;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;
import java.util.LinkedList;
import java.util.List;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.TimeUnit;
import org.hamcrest.Matchers;
import org.junit.Test;
import org.mockito.ArgumentCaptor;
import org.mockito.Mockito;
import org.reactivestreams.Subscriber;
import org.reactivestreams.Subscription;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.config.ConfigurableBeanFactory;
import org.springframework.integration.channel.DirectChannel;
import org.springframework.integration.channel.FluxMessageChannel;
import org.springframework.integration.channel.QueueChannel;
import org.springframework.integration.config.ConsumerEndpointFactoryBean;
import org.springframework.integration.endpoint.ReactiveStreamsConsumer;
import org.springframework.integration.handler.MethodInvokingMessageHandler;
import org.springframework.messaging.Message;
import org.springframework.messaging.MessageDeliveryException;
import org.springframework.messaging.MessageHandler;
import org.springframework.messaging.support.GenericMessage;
/**
* @author Artem Bilan
*
* @since 5.0
*/
public class ReactiveStreamsConsumerTests {
@Test
public void testReactiveStreamsConsumerFluxMessageChannel() throws InterruptedException {
FluxMessageChannel testChannel = new FluxMessageChannel();
List<Message<?>> result = new LinkedList<>();
CountDownLatch stopLatch = new CountDownLatch(2);
MessageHandler messageHandler = m -> {
result.add(m);
stopLatch.countDown();
};
MessageHandler testSubscriber = new MethodInvokingMessageHandler(messageHandler, (String) null);
ReactiveStreamsConsumer reactiveConsumer = new ReactiveStreamsConsumer(testChannel, testSubscriber);
reactiveConsumer.setBeanFactory(mock(BeanFactory.class));
reactiveConsumer.afterPropertiesSet();
reactiveConsumer.start();
Message<?> testMessage = new GenericMessage<>("test");
testChannel.send(testMessage);
reactiveConsumer.stop();
testChannel.send(testMessage);
reactiveConsumer.start();
Message<?> testMessage2 = new GenericMessage<>("test2");
testChannel.send(testMessage2);
assertTrue(stopLatch.await(10, TimeUnit.SECONDS));
assertThat(result, Matchers.<Message<?>>contains(testMessage, testMessage2));
}
@Test
@SuppressWarnings("unchecked")
public void testReactiveStreamsConsumerDirectChannel() throws InterruptedException {
DirectChannel testChannel = new DirectChannel();
Subscriber<Message<?>> testSubscriber = (Subscriber<Message<?>>) Mockito.mock(Subscriber.class);
BlockingQueue<Message<?>> messages = new LinkedBlockingQueue<>();
willAnswer(i -> {
messages.put(i.getArgument(0));
return null;
})
.given(testSubscriber)
.onNext(any(Message.class));
ReactiveStreamsConsumer reactiveConsumer = new ReactiveStreamsConsumer(testChannel, testSubscriber);
reactiveConsumer.setBeanFactory(mock(BeanFactory.class));
reactiveConsumer.afterPropertiesSet();
reactiveConsumer.start();
Message<?> testMessage = new GenericMessage<>("test");
testChannel.send(testMessage);
ArgumentCaptor<Subscription> subscriptionArgumentCaptor = ArgumentCaptor.forClass(Subscription.class);
verify(testSubscriber).onSubscribe(subscriptionArgumentCaptor.capture());
Subscription subscription = subscriptionArgumentCaptor.getValue();
subscription.request(1);
Message<?> message = messages.poll(10, TimeUnit.SECONDS);
assertSame(testMessage, message);
reactiveConsumer.stop();
try {
testChannel.send(testMessage);
fail("MessageDeliveryException");
}
catch (Exception e) {
assertThat(e, instanceOf(MessageDeliveryException.class));
}
reactiveConsumer.start();
subscription.request(1);
testMessage = new GenericMessage<>("test2");
testChannel.send(testMessage);
message = messages.poll(10, TimeUnit.SECONDS);
assertSame(testMessage, message);
verify(testSubscriber, never()).onError(any(Throwable.class));
verify(testSubscriber, never()).onComplete();
assertTrue(messages.isEmpty());
}
@Test
@SuppressWarnings("unchecked")
public void testReactiveStreamsConsumerPollableChannel() throws InterruptedException {
QueueChannel testChannel = new QueueChannel();
Subscriber<Message<?>> testSubscriber = (Subscriber<Message<?>>) Mockito.mock(Subscriber.class);
BlockingQueue<Message<?>> messages = new LinkedBlockingQueue<>();
willAnswer(i -> {
messages.put(i.getArgument(0));
return null;
})
.given(testSubscriber)
.onNext(any(Message.class));
ReactiveStreamsConsumer reactiveConsumer = new ReactiveStreamsConsumer(testChannel, testSubscriber);
reactiveConsumer.setBeanFactory(mock(BeanFactory.class));
reactiveConsumer.afterPropertiesSet();
reactiveConsumer.start();
Message<?> testMessage = new GenericMessage<>("test");
testChannel.send(testMessage);
ArgumentCaptor<Subscription> subscriptionArgumentCaptor = ArgumentCaptor.forClass(Subscription.class);
verify(testSubscriber).onSubscribe(subscriptionArgumentCaptor.capture());
Subscription subscription = subscriptionArgumentCaptor.getValue();
subscription.request(1);
Message<?> message = messages.poll(10, TimeUnit.SECONDS);
assertSame(testMessage, message);
reactiveConsumer.stop();
testChannel.send(testMessage);
reactiveConsumer.start();
verify(testSubscriber, times(2)).onSubscribe(subscriptionArgumentCaptor.capture());
subscription = subscriptionArgumentCaptor.getValue();
subscription.request(2);
Message<?> testMessage2 = new GenericMessage<>("test2");
testChannel.send(testMessage2);
message = messages.poll(10, TimeUnit.SECONDS);
assertSame(testMessage, message);
message = messages.poll(10, TimeUnit.SECONDS);
assertSame(testMessage2, message);
verify(testSubscriber, never()).onError(any(Throwable.class));
verify(testSubscriber, never()).onComplete();
assertTrue(messages.isEmpty());
}
@Test
public void testReactiveStreamsConsumerViaConsumerEndpointFactoryBean() throws Exception {
FluxMessageChannel testChannel = new FluxMessageChannel();
List<Message<?>> result = new LinkedList<>();
CountDownLatch stopLatch = new CountDownLatch(3);
MessageHandler messageHandler = m -> {
result.add(m);
stopLatch.countDown();
};
ConsumerEndpointFactoryBean endpointFactoryBean = new ConsumerEndpointFactoryBean();
endpointFactoryBean.setBeanFactory(mock(ConfigurableBeanFactory.class));
endpointFactoryBean.setInputChannel(testChannel);
endpointFactoryBean.setHandler(messageHandler);
endpointFactoryBean.setBeanName("reactiveConsumer");
endpointFactoryBean.afterPropertiesSet();
endpointFactoryBean.start();
Message<?> testMessage = new GenericMessage<>("test");
testChannel.send(testMessage);
endpointFactoryBean.stop();
testChannel.send(testMessage);
endpointFactoryBean.start();
Message<?> testMessage2 = new GenericMessage<>("test2");
testChannel.send(testMessage2);
testChannel.send(testMessage2);
assertTrue(stopLatch.await(10, TimeUnit.SECONDS));
assertThat(result.size(), equalTo(3));
assertThat(result, Matchers.<Message<?>>contains(testMessage, testMessage2, testMessage2));
}
}