/*
* Copyright 2002-2017 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.samples.advance.testing.jms;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import static org.mockito.BDDMockito.given;
import static org.mockito.Matchers.anyString;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;
import java.io.IOException;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicReference;
import javax.jms.JMSException;
import javax.jms.TextMessage;
import org.apache.log4j.Logger;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mockito;
import org.mockito.invocation.InvocationOnMock;
import org.mockito.stubbing.Answer;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.integration.endpoint.SourcePollingChannelAdapter;
import org.springframework.jms.core.JmsTemplate;
import org.springframework.jms.support.converter.SimpleMessageConverter;
import org.springframework.messaging.Message;
import org.springframework.messaging.MessageChannel;
import org.springframework.messaging.MessageHandler;
import org.springframework.messaging.MessagingException;
import org.springframework.messaging.SubscribableChannel;
import org.springframework.test.annotation.DirtiesContext;
import org.springframework.test.annotation.DirtiesContext.ClassMode;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
/**
* @author David Turanski
* @author Gunnar Hillert
* @author Gary Russell
* @author Artem Bilan
*/
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration
@DirtiesContext(classMode = ClassMode.AFTER_EACH_TEST_METHOD)
public class JmsMockTests {
private static final Logger LOGGER = Logger.getLogger(JmsMockTests.class);
private final AtomicReference<String> testMessageHolder = new AtomicReference<>();
@Autowired
private JmsTemplate mockJmsTemplate;
@Autowired
private SourcePollingChannelAdapter jmsInboundChannelAdapter;
@Autowired
@Qualifier("inputChannel")
private MessageChannel inputChannel;
@Autowired
@Qualifier("outputChannel")
private SubscribableChannel outputChannel;
@Autowired
@Qualifier("invalidMessageChannel")
private SubscribableChannel invalidMessageChannel;
@Before
public void setup() throws JMSException {
Mockito.reset(this.mockJmsTemplate);
TextMessage message = mock(TextMessage.class);
when(this.mockJmsTemplate.getMessageConverter()).thenReturn(new SimpleMessageConverter());
when(this.mockJmsTemplate.receiveSelected(anyString())).thenReturn(message);
given(message.getText())
.willAnswer(new Answer<String>() {
@Override
public String answer(InvocationOnMock invocation) throws Throwable {
return testMessageHolder.get();
}
});
}
/**
* This test verifies that a message received on a polling JMS inbound channel adapter is
* routed to the designated channel and that the message payload is as expected
*
* @throws JMSException
* @throws InterruptedException
* @throws IOException
*/
@Test
public void testReceiveMessage() throws JMSException, InterruptedException, IOException {
String msg = "hello";
boolean sent = verifyJmsMessageReceivedOnOutputChannel(msg, outputChannel, new CountDownHandler() {
@Override
protected void verifyMessage(Message<?> message) {
assertEquals("hello", message.getPayload());
}
}
);
assertTrue("message not sent to expected output channel", sent);
}
/**
* This test verifies that a message received on a polling JMS inbound channel adapter is
* routed to the errorChannel and that the message payload is the expected exception
*
* @throws JMSException
* @throws IOException
* @throws InterruptedException
*/
@Test
public void testReceiveInvalidMessage() throws JMSException, IOException, InterruptedException {
String msg = "whoops";
boolean sent = verifyJmsMessageReceivedOnOutputChannel(msg, invalidMessageChannel, new CountDownHandler() {
@Override
protected void verifyMessage(Message<?> message) {
assertEquals("invalid payload", message.getPayload());
}
}
);
assertTrue("message not sent to expected output channel", sent);
}
/**
* Provide a message via a mock JMS template and wait for the default timeout to receive the message
* on the expected channel
* @param obj The message provided to the poller (currently must be a String)
* @param expectedOutputChannel The expected output channel
* @param handler An instance of CountDownHandler to handle (verify) the output message
* @return true if the message was received on the expected channel
* @throws JMSException
* @throws InterruptedException
*/
protected boolean verifyJmsMessageReceivedOnOutputChannel(Object obj, SubscribableChannel expectedOutputChannel,
CountDownHandler handler) throws JMSException, InterruptedException {
return verifyJmsMessageOnOutputChannel(obj, expectedOutputChannel, handler, 7000);
}
/**
* Provide a message via a mock JMS template and wait for the specified timeout to receive the message
* on the expected channel
* @param obj The message provided to the poller (currently must be a String)
* @param expectedOutputChannel The expected output channel
* @param handler An instance of CountDownHandler to handle (verify) the output message
* @param timeoutMillisec The timeout period. Note that this must allow at least enough time
* to process the entire flow. Only set if the default is
* not long enough
* @return true if the message was received on the expected channel
* @throws JMSException
* @throws InterruptedException
*/
protected boolean verifyJmsMessageOnOutputChannel(Object obj, SubscribableChannel expectedOutputChannel,
CountDownHandler handler, int timeoutMillisec) throws JMSException,
InterruptedException {
if (!(obj instanceof String)) {
throw new IllegalArgumentException("Only TextMessage is currently supported");
}
/*
* Use mocks to create a message returned to the JMS inbound adapter. It is assumed that the JmsTemplate
* is also a mock.
*/
this.testMessageHolder.set((String) obj);
CountDownLatch latch = new CountDownLatch(1);
handler.setLatch(latch);
expectedOutputChannel.subscribe(handler);
this.jmsInboundChannelAdapter.start();
boolean latchCountedToZero = latch.await(timeoutMillisec, TimeUnit.MILLISECONDS);
if (!latchCountedToZero) {
LOGGER.warn(String.format("The specified waiting time of the latch (%s ms) elapsed.", timeoutMillisec));
}
return latchCountedToZero;
}
/*
* A MessageHandler that uses a CountDownLatch to synchronize with the calling thread
*/
private abstract class CountDownHandler implements MessageHandler {
CountDownLatch latch;
public final void setLatch(CountDownLatch latch) {
this.latch = latch;
}
protected abstract void verifyMessage(Message<?> message);
/*
* (non-Javadoc)
*
* @see
* org.springframework.integration.core.MessageHandler#handleMessage
* (org.springframework.integration.Message)
*/
public void handleMessage(Message<?> message) throws MessagingException {
verifyMessage(message);
latch.countDown();
}
}
}