/*
* Copyright 2002-2014 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.messaging.core;
import java.util.List;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicReference;
import org.junit.Before;
import org.junit.Test;
import org.springframework.messaging.Message;
import org.springframework.messaging.MessageChannel;
import org.springframework.messaging.MessageDeliveryException;
import org.springframework.messaging.MessageHandler;
import org.springframework.messaging.MessageHeaders;
import org.springframework.messaging.MessagingException;
import org.springframework.messaging.StubMessageChannel;
import org.springframework.messaging.SubscribableChannel;
import org.springframework.messaging.support.ExecutorSubscribableChannel;
import org.springframework.messaging.support.GenericMessage;
import org.springframework.messaging.support.MessageHeaderAccessor;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
import static org.junit.Assert.*;
/**
* Unit tests for {@link GenericMessagingTemplate}.
*
* @author Rossen Stoyanchev
*/
public class GenericMessagingTemplateTests {
private GenericMessagingTemplate template;
private StubMessageChannel messageChannel;
private ThreadPoolTaskExecutor executor;
@Before
public void setup() {
this.messageChannel = new StubMessageChannel();
this.template = new GenericMessagingTemplate();
this.template.setDefaultDestination(this.messageChannel);
this.template.setDestinationResolver(new TestDestinationResolver());
this.executor = new ThreadPoolTaskExecutor();
this.executor.afterPropertiesSet();
}
@Test
public void sendAndReceive() {
SubscribableChannel channel = new ExecutorSubscribableChannel(this.executor);
channel.subscribe(new MessageHandler() {
@Override
public void handleMessage(Message<?> message) throws MessagingException {
MessageChannel replyChannel = (MessageChannel) message.getHeaders().getReplyChannel();
replyChannel.send(new GenericMessage<String>("response"));
}
});
String actual = this.template.convertSendAndReceive(channel, "request", String.class);
assertEquals("response", actual);
}
@Test
public void sendAndReceiveTimeout() throws InterruptedException {
final AtomicReference<Throwable> failure = new AtomicReference<Throwable>();
final CountDownLatch latch = new CountDownLatch(1);
this.template.setReceiveTimeout(1);
this.template.setThrowExceptionOnLateReply(true);
SubscribableChannel channel = new ExecutorSubscribableChannel(this.executor);
channel.subscribe(new MessageHandler() {
@Override
public void handleMessage(Message<?> message) throws MessagingException {
try {
Thread.sleep(500);
MessageChannel replyChannel = (MessageChannel) message.getHeaders().getReplyChannel();
replyChannel.send(new GenericMessage<String>("response"));
failure.set(new IllegalStateException("Expected exception"));
}
catch (InterruptedException e) {
failure.set(e);
}
catch (MessageDeliveryException ex) {
String expected = "Reply message received but the receiving thread has exited due to a timeout";
String actual = ex.getMessage();
if (!expected.equals(actual)) {
failure.set(new IllegalStateException("Unexpected error: '" + actual + "'"));
}
}
finally {
latch.countDown();
}
}
});
assertNull(this.template.convertSendAndReceive(channel, "request", String.class));
assertTrue(latch.await(1000, TimeUnit.MILLISECONDS));
if (failure.get() != null) {
throw new AssertionError(failure.get());
}
}
@Test
public void convertAndSendWithSimpMessageHeaders() {
MessageHeaderAccessor accessor = new MessageHeaderAccessor();
accessor.setHeader("key", "value");
accessor.setLeaveMutable(true);
MessageHeaders headers = accessor.getMessageHeaders();
this.template.convertAndSend("channel", "data", headers);
List<Message<byte[]>> messages = this.messageChannel.getMessages();
Message<byte[]> message = messages.get(0);
assertSame(headers, message.getHeaders());
assertFalse(accessor.isMutable());
}
private class TestDestinationResolver implements DestinationResolver<MessageChannel> {
@Override
public MessageChannel resolveDestination(String name) throws DestinationResolutionException {
return messageChannel;
}
}
}