ActiveMQ example source code file (MessageExpirationReaperTest.java)

This example ActiveMQ source code file (MessageExpirationReaperTest.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

activemqconnection, activemqdestination, brokerservice, destinationviewmbean, exception, exception, incorrect, management, objectname, objectname, session, session, string, string, textmessage

The ActiveMQ MessageExpirationReaperTest.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.assertEquals;
import static org.junit.Assert.assertFalse;
import org.apache.activemq.ActiveMQConnection;
import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.broker.jmx.DestinationViewMBean;
import org.apache.activemq.broker.region.policy.PolicyEntry;
import org.apache.activemq.broker.region.policy.PolicyMap;
import org.apache.activemq.command.ActiveMQDestination;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import javax.jms.ConnectionFactory;
import javax.jms.MessageProducer;
import javax.jms.Queue;
import javax.jms.QueueBrowser;
import javax.jms.Session;
import javax.jms.TextMessage;
import javax.management.ObjectName;

/**
 * Test to determine if expired messages are being reaped if there is
 * no active consumer connected to the broker. 
 * 
 * @author bsnyder
 *
 */
public class MessageExpirationReaperTest {
    
    protected BrokerService broker; 
    protected ConnectionFactory factory;
    protected ActiveMQConnection connection;
    protected String destinationName = "TEST.Q";
    protected String brokerUrl = "tcp://localhost:61616";
    protected String brokerName = "testBroker";
    
    @Before
    public void init() throws Exception {
        createBroker();
        
        factory = createConnectionFactory();
        connection = (ActiveMQConnection) factory.createConnection();
        connection.start();
    }
    
    @After
    public void cleanUp() throws Exception {
        connection.close();
        broker.stop();
    }
    
    protected void createBroker() throws Exception {
        broker = new BrokerService();
        broker.setDeleteAllMessagesOnStartup(true);
        broker.setBrokerName(brokerName);
        broker.addConnector(brokerUrl);
        
        PolicyMap policyMap = new PolicyMap();
        PolicyEntry defaultEntry = new PolicyEntry();
        defaultEntry.setExpireMessagesPeriod(500);
        policyMap.setDefaultEntry(defaultEntry);
        broker.setDestinationPolicy(policyMap);
        
        broker.start();
    }
    
    protected ConnectionFactory createConnectionFactory() throws Exception {
        return new ActiveMQConnectionFactory(brokerUrl);
    }
    
    protected Session createSession() throws Exception {
        return connection.createSession(false, Session.AUTO_ACKNOWLEDGE);  
    }
    
    @Test
    public void testExpiredMessageReaping() throws Exception {
        
        Session producerSession = createSession();
        ActiveMQDestination destination =  (ActiveMQDestination) producerSession.createQueue(destinationName);
        MessageProducer producer = producerSession.createProducer(destination);
        producer.setTimeToLive(1000);
        
        final int count = 3;
        // Send some messages with an expiration 
        for (int i = 0; i < count; i++) {
            TextMessage message = producerSession.createTextMessage("" + i);
            producer.send(message);
        }
        
        // Let the messages expire 
        Thread.sleep(2000);
        
        DestinationViewMBean view = createView(destination);
        
        assertEquals("Incorrect inflight count: " + view.getInFlightCount(), 0, view.getInFlightCount());
        assertEquals("Incorrect queue size count", 0, view.getQueueSize());
        assertEquals("Incorrect expired size count", view.getEnqueueCount(), view.getExpiredCount());   
        
        // Send more messages with an expiration 
        for (int i = 0; i < count; i++) {
            TextMessage message = producerSession.createTextMessage("" + i);
            producer.send(message);
        }
        
        // Let the messages expire 
        Thread.sleep(2000);
        
        // Simply browse the queue 
        Session browserSession = createSession();
        QueueBrowser browser = browserSession.createBrowser((Queue) destination);
        assertFalse("no message in the browser", browser.getEnumeration().hasMoreElements()); 
        
        // The messages expire and should be reaped because of the presence of 
        // the queue browser 
        assertEquals("Wrong inFlightCount: " + view.getInFlightCount(), 0, view.getInFlightCount());
    }
    
    protected DestinationViewMBean createView(ActiveMQDestination destination) throws Exception {
        String domain = "org.apache.activemq";
        ObjectName name;
        if (destination.isQueue()) {
            name = new ObjectName(domain + ":BrokerName=" + brokerName + ",Type=Queue,Destination=" + destinationName);
        } else {
            name = new ObjectName(domain + ":BrokerName=" + brokerName + ",Type=Topic,Destination=" + destinationName);
        }
        return (DestinationViewMBean) broker.getManagementContext().newProxyInstance(name, DestinationViewMBean.class,
                true);
    }
}