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ActiveMQ example source code file (JmsSendReceiveTestSupport.java)

This example ActiveMQ source code file (JmsSendReceiveTestSupport.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - ActiveMQ tags/keywords

destination, destination, exception, jmsexception, list, list, message, message, object, received, string, string, text, textmessage, util

The ActiveMQ JmsSendReceiveTestSupport.java source code

/**
 * 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.activemq;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Date;
import java.util.Iterator;
import java.util.List;

import javax.jms.DeliveryMode;
import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageListener;
import javax.jms.MessageProducer;
import javax.jms.Session;
import javax.jms.TextMessage;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * 
 */
public class JmsSendReceiveTestSupport extends TestSupport implements MessageListener {
    private static final Logger LOG = LoggerFactory.getLogger(JmsSendReceiveTestSupport.class);

    protected int messageCount = 100;
    protected String[] data;
    protected Session session;
    protected MessageConsumer consumer;
    protected MessageProducer producer;
    protected Destination consumerDestination;
    protected Destination producerDestination;
    protected List<Message> messages = createConcurrentList();
    protected boolean topic = true;
    protected boolean durable;
    protected int deliveryMode = DeliveryMode.PERSISTENT;
    protected final Object lock = new Object();
    protected boolean verbose;

    /*
     * @see junit.framework.TestCase#setUp()
     */
    protected void setUp() throws Exception {
        super.setUp();
        String temp = System.getProperty("messageCount");

        if (temp != null) {
            int i = Integer.parseInt(temp);
            if (i > 0) {
                messageCount = i;
            }
        }

        LOG.info("Message count for test case is: " + messageCount);
        data = new String[messageCount];

        for (int i = 0; i < messageCount; i++) {
            data[i] = "Text for message: " + i + " at " + new Date();
        }
    }

    /**
     * Sends and consumes the messages.
     * 
     * @throws Exception
     */
    public void testSendReceive() throws Exception {
        messages.clear();
        for (int i = 0; i < data.length; i++) {
            Message message = session.createTextMessage(data[i]);
            message.setStringProperty("stringProperty", data[i]);
            message.setIntProperty("intProperty", i);

            if (verbose) {
                if (LOG.isDebugEnabled()) {
                    LOG.debug("About to send a message: " + message + " with text: " + data[i]);
                }
            }

            sendToProducer(producer, producerDestination, message);
            messageSent();
        }

        assertMessagesAreReceived();
        LOG.info("" + data.length + " messages(s) received, closing down connections");
    }

    /**
     * Sends a message to a destination using the supplied producer
     * @param producer
     * @param producerDestination
     * @param message
     * @throws JMSException
     */
    protected void sendToProducer(MessageProducer producer,
            Destination producerDestination, Message message) throws JMSException {
        producer.send(producerDestination, message);   
    }

    /**
     * Asserts messages are received.
     * 
     * @throws JMSException
     */
    protected void assertMessagesAreReceived() throws JMSException {
        waitForMessagesToBeDelivered();
        assertMessagesReceivedAreValid(messages);
    }

    /**
     * Tests if the messages received are valid.
     * 
     * @param receivedMessages - list of received messages.
     * @throws JMSException
     */
    protected void assertMessagesReceivedAreValid(List<Message> receivedMessages) throws JMSException {
        List<Object> copyOfMessages = Arrays.asList(receivedMessages.toArray());
        int counter = 0;

        if (data.length != copyOfMessages.size()) {
            for (Iterator<Object> iter = copyOfMessages.iterator(); iter.hasNext();) {
                TextMessage message = (TextMessage)iter.next();
                if (LOG.isInfoEnabled()) {
                    LOG.info("<== " + counter++ + " = " + message.getText());
                }
            }
        }

        assertEquals("Not enough messages received", data.length, receivedMessages.size());

        for (int i = 0; i < data.length; i++) {
            TextMessage received = (TextMessage)receivedMessages.get(i);
            String text = received.getText();
            String stringProperty = received.getStringProperty("stringProperty");
            int intProperty = received.getIntProperty("intProperty");

            if (verbose) {
                if (LOG.isDebugEnabled()) {
                    LOG.info("Received Text: " + text);
                }
            }

            assertEquals("Message: " + i, data[i], text);
            assertEquals(data[i], stringProperty);
            assertEquals(i, intProperty);
        }
    }

    /**
     * Waits for messages to be delivered.
     */
    protected void waitForMessagesToBeDelivered() {
        long maxWaitTime = 30000;
        long waitTime = maxWaitTime;
        long start = (maxWaitTime <= 0) ? 0 : System.currentTimeMillis();

        synchronized (lock) {
            while (messages.size() < data.length && waitTime >= 0) {
                try {
                    lock.wait(200);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }

                waitTime = maxWaitTime - (System.currentTimeMillis() - start);
            }
        }
    }

    /*
     * (non-Javadoc)
     * 
     * @see javax.jms.MessageListener#onMessage(javax.jms.Message)
     */
    public synchronized void onMessage(Message message) {
        consumeMessage(message, messages);
    }

    /**
     * Consumes messages.
     * 
     * @param message - message to be consumed.
     * @param messageList -list of consumed messages.
     */
    protected void consumeMessage(Message message, List<Message> messageList) {
        if (verbose) {
            if (LOG.isDebugEnabled()) {
                LOG.info("Received message: " + message);
            }
        }

        messageList.add(message);

        if (messageList.size() >= data.length) {
            synchronized (lock) {
                lock.notifyAll();
            }
        }
    }

    /**
     * Returns the ArrayList as a synchronized list.
     * 
     * @return List
     */
    protected List<Message> createConcurrentList() {
        return Collections.synchronizedList(new ArrayList<Message>());
    }

    /**
     * Just a hook so can insert failure tests
     * 
     * @throws Exception
     */
    protected void messageSent() throws Exception {

    }
}

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