ActiveMQ example source code file (DataFileNotDeletedTest.java)

This example ActiveMQ source code file (DataFileNotDeletedTest.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

amqpersistenceadapter, amqpersistenceadapterfactory, brokerservice, connection, connection, exception, exception, messagelistener, messagesender, override, receiver, receiver, string, string, threading, threads

The ActiveMQ DataFileNotDeletedTest.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 java.util.concurrent.CountDownLatch;
import javax.jms.Connection;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageListener;
import javax.jms.ObjectMessage;
import javax.jms.Session;
import junit.framework.TestCase;
import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.kaha.impl.async.AsyncDataManager;
import org.apache.activemq.store.amq.AMQPersistenceAdapter;
import org.apache.activemq.store.amq.AMQPersistenceAdapterFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/*
 * see https://issues.apache.org/activemq/browse/AMQ-1926
 */
public class DataFileNotDeletedTest extends TestCase {

    private static final Logger LOG = LoggerFactory.getLogger(DataFileNotDeletedTest.class);

    private final CountDownLatch latch = new CountDownLatch(max_messages);
    private static int max_messages = 600;
    private static int messageCounter;
    private final String destinationName = getName()+"_Queue";
    private BrokerService broker;
    private Connection receiverConnection;
    private Connection producerConnection;
    final boolean useTopic = false;
    
    AMQPersistenceAdapter persistentAdapter;
    protected static final String payload = new String(new byte[512]);

    @Override
    public void setUp() throws Exception {
        messageCounter = 0;
        startBroker();
        receiverConnection = createConnection();
        receiverConnection.start();
        producerConnection = createConnection();
        producerConnection.start();
    }
    
    @Override
    public void tearDown() throws Exception {
        receiverConnection.close();
        producerConnection.close();
        broker.stop();
    }

    public void testForDataFileNotDeleted() throws Exception {
        doTestForDataFileNotDeleted(false);
    }
    
    public void testForDataFileNotDeletedTransacted() throws Exception {
        doTestForDataFileNotDeleted(true);
    }
    
    private void doTestForDataFileNotDeleted(boolean transacted) throws Exception {
        
        Receiver receiver = new Receiver() {
            public void receive(String s) throws Exception {
                messageCounter++; 
                latch.countDown();
            }
        };
        buildReceiver(receiverConnection, destinationName, transacted, receiver, useTopic);

        final MessageSender producer = new MessageSender(destinationName, producerConnection, transacted, useTopic);
        for (int i=0; i< max_messages; i++) {
            producer.send(payload );
        }
        latch.await();
        assertEquals(max_messages, messageCounter);
        LOG.info("Sent and received + " + messageCounter + ", file count " + persistentAdapter.getAsyncDataManager().getFiles().size());
        waitFordataFilesToBeCleanedUp(persistentAdapter.getAsyncDataManager(), 60000, 2); 
    }

    private void waitFordataFilesToBeCleanedUp(
            AsyncDataManager asyncDataManager, int timeout, int numExpected) throws InterruptedException {
        long expiry = System.currentTimeMillis()  + timeout;
        while(expiry > System.currentTimeMillis()) {
            if (asyncDataManager.getFiles().size() > numExpected) {
                Thread.sleep(1000);
            } else {
                break;
            }
        }
        assertEquals("persistence adapter dataManager has correct number of files", numExpected, asyncDataManager.getFiles().size());
    }

    private Connection createConnection() throws JMSException {
        ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory("tcp://localhost:61616");
        return factory.createConnection();
    }

    private void startBroker() throws Exception {
        broker = new BrokerService();
        broker.setDeleteAllMessagesOnStartup(true);
        broker.setPersistent(true);
        broker.setUseJmx(true);
        broker.addConnector("tcp://localhost:61616").setName("Default");
        broker.setPersistenceFactory(new AMQPersistenceAdapterFactory());
        AMQPersistenceAdapterFactory factory = (AMQPersistenceAdapterFactory) broker.getPersistenceFactory();
        // ensure there are a bunch of data files but multiple entries in each
        factory.setMaxFileLength(1024 * 20);
        // speed up the test case, checkpoint an cleanup early and often
        factory.setCheckpointInterval(500);
        factory.setCleanupInterval(500);
        factory.setSyncOnWrite(false);
        
        persistentAdapter = (AMQPersistenceAdapter) broker.getPersistenceAdapter();
        broker.start();
        LOG.info("Starting broker..");
    }

    private void buildReceiver(Connection connection, final String queueName, boolean transacted, final Receiver receiver, boolean isTopic) throws Exception {
        final Session session = transacted ? connection.createSession(true, Session.SESSION_TRANSACTED) : connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
        MessageConsumer inputMessageConsumer = session.createConsumer(isTopic ? session.createTopic(queueName) : session.createQueue(queueName));
        MessageListener messageListener = new MessageListener() {

            public void onMessage(Message message) {
                try {
                    ObjectMessage objectMessage = (ObjectMessage)message;
                    String s = (String)objectMessage.getObject();
                    receiver.receive(s);
                    if (session.getTransacted()) {
                        session.commit();
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        };
        inputMessageConsumer.setMessageListener(messageListener);
    }
}