ActiveMQ example source code file (AMQ2084Test.java)

This example ActiveMQ source code file (AMQ2084Test.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

connectionfactory, exception, exception, initialcontext, message, naming, properties, properties, queue, string, string, textmessage, textmessage, threading, threads, topic, topicconnectionfactory, util

The ActiveMQ AMQ2084Test.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.bugs;

import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;

import java.util.Properties;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;

import javax.jms.Message;
import javax.jms.MessageListener;
import javax.jms.Queue;
import javax.jms.QueueConnection;
import javax.jms.QueueConnectionFactory;
import javax.jms.QueueReceiver;
import javax.jms.QueueSession;
import javax.jms.Session;
import javax.jms.TextMessage;
import javax.jms.Topic;
import javax.jms.TopicConnection;
import javax.jms.TopicConnectionFactory;
import javax.jms.TopicPublisher;
import javax.jms.TopicSession;
import javax.jms.TopicSubscriber;
import javax.naming.InitialContext;

import org.apache.activemq.broker.BrokerService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

public class AMQ2084Test {

    private static final Logger LOG = LoggerFactory.getLogger(AMQ2084Test.class);
    BrokerService broker;
    CountDownLatch qreceived;
    
    @Before
    public void startBroker() throws Exception {
        broker = new BrokerService();
        broker.setPersistent(false);
        broker.addConnector("tcp://localhost:61616");
        broker.start();
        
        qreceived = new CountDownLatch(1);
    }
    
    @After
    public void stopBroker() throws Exception {
        if (broker != null) {
            broker.stop();
        }
    }
    
    public void listenQueue(final String queueName, final String selectors) {
        try {
            Properties props = new Properties();
            props.put("java.naming.factory.initial", "org.apache.activemq.jndi.ActiveMQInitialContextFactory");
            props.put("java.naming.provider.url", "tcp://localhost:61616");
            props.put("queue.queueName", queueName);

            javax.naming.Context ctx = new InitialContext(props);
            QueueConnectionFactory factory = (QueueConnectionFactory) ctx.lookup("ConnectionFactory");
            QueueConnection conn = factory.createQueueConnection();
            final Queue queue = (Queue) ctx.lookup("queueName");
            QueueSession session = conn.createQueueSession(false, Session.AUTO_ACKNOWLEDGE);
            QueueReceiver receiver = session.createReceiver(queue, selectors);
            System.out.println("Message Selector: " + receiver.getMessageSelector());
            receiver.setMessageListener(new MessageListener() {
                public void onMessage(Message message) {
                    try {
                        if (message instanceof TextMessage) {
                            TextMessage txtMsg = (TextMessage) message;
                            String msg = txtMsg.getText();
                            LOG.info("Queue Message Received: " + queueName + " - " + msg);
                            qreceived.countDown();
                            
                        }
                        message.acknowledge();
                    } catch (Throwable e) {
                        e.printStackTrace();
                    }
                }
            });
            conn.start();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public void listenTopic(final String topicName, final String selectors) {
        try {
            Properties props = new Properties();
            props.put("java.naming.factory.initial", "org.apache.activemq.jndi.ActiveMQInitialContextFactory");
            props.put("java.naming.provider.url", "tcp://localhost:61616");
            props.put("topic.topicName", topicName);

            javax.naming.Context ctx = new InitialContext(props);
            TopicConnectionFactory factory = (TopicConnectionFactory) ctx.lookup("ConnectionFactory");
            TopicConnection conn = factory.createTopicConnection();
            final Topic topic = (Topic) ctx.lookup("topicName");
            TopicSession session = conn.createTopicSession(false, Session.AUTO_ACKNOWLEDGE);
            TopicSubscriber receiver = session.createSubscriber(topic, selectors, false);

            receiver.setMessageListener(new MessageListener() {
                public void onMessage(Message message) {
                    try {
                        if (message instanceof TextMessage) {
                            TextMessage txtMsg = (TextMessage) message;
                            String msg = txtMsg.getText();
                            LOG.info("Topic Message Received: " + topicName + " - " + msg);
                        }
                        message.acknowledge();
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                }
            });
            conn.start();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public void publish(String topicName, String message) {
        try {
            Properties props = new Properties();
            props.put("java.naming.factory.initial", "org.apache.activemq.jndi.ActiveMQInitialContextFactory");
            props.put("java.naming.provider.url", "tcp://localhost:61616");
            props.put("topic.topicName", topicName);
            javax.naming.Context ctx = new InitialContext(props);
            TopicConnectionFactory factory = (TopicConnectionFactory) ctx.lookup("ConnectionFactory");
            TopicConnection conn = factory.createTopicConnection();
            Topic topic = (Topic) ctx.lookup("topicName");
            TopicSession session = conn.createTopicSession(false, Session.AUTO_ACKNOWLEDGE);
            TopicPublisher publisher = session.createPublisher(topic);
            if (message != null) {
                Message msg = session.createTextMessage(message);
                publisher.send(msg);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    @Test
    public void tryXpathSelectorMatch() throws Exception {
        String xPath = "XPATH '//books//book[@lang=''en'']'";
        listenQueue("Consumer.Sample.VirtualTopic.TestXpath", xPath);
        publish("VirtualTopic.TestXpath", "<?xml version=\"1.0\" encoding=\"UTF-8\"?>ABC");
        assertTrue("topic received: ", qreceived.await(20, TimeUnit.SECONDS));        
    }
    
    @Test
    public void tryXpathSelectorNoMatch() throws Exception {
        String xPath = "XPATH '//books//book[@lang=''es'']'";
        listenQueue("Consumer.Sample.VirtualTopic.TestXpath", xPath);
        publish("VirtualTopic.TestXpath", "<?xml version=\"1.0\" encoding=\"UTF-8\"?>ABC");
        assertFalse("topic did not receive unmatched", qreceived.await(5, TimeUnit.SECONDS));        
    }

}