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ActiveMQ example source code file (AMQ3120Test.java)

This example ActiveMQ source code file (AMQ3120Test.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

amq3120test, amq3120test, brokerservice, consumerthread, exception, exception, file, file, io, kahadbpersistenceadapter, policyentry, producerthread, session, string, string

The ActiveMQ AMQ3120Test.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 org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.broker.region.policy.PolicyEntry;
import org.apache.activemq.broker.region.policy.PolicyMap;
import org.apache.activemq.command.ActiveMQQueue;
import org.apache.activemq.store.kahadb.KahaDBPersistenceAdapter;
import org.apache.activemq.util.ConsumerThread;
import org.apache.activemq.util.ProducerThread;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.junit.Test;

import javax.jms.*;

import java.io.File;

import static org.junit.Assert.assertEquals;

public class AMQ3120Test {

    private static final Logger LOG = LoggerFactory.getLogger(AMQ3120Test.class);

    BrokerService broker = null;
    File kahaDbDir = null;
    private final Destination destination = new ActiveMQQueue("AMQ3120Test");
    final String payload = new String(new byte[1024]);

    protected void startBroker(boolean delete) throws Exception {
        broker = new BrokerService();

        //Start with a clean directory
        kahaDbDir = new File(broker.getBrokerDataDirectory(), "KahaDB");
        deleteDir(kahaDbDir);

        broker.setSchedulerSupport(false);
        broker.setDeleteAllMessagesOnStartup(delete);
        broker.setPersistent(true);
        broker.setUseJmx(false);
        broker.addConnector("tcp://localhost:0");

        PolicyMap map = new PolicyMap();
        PolicyEntry entry = new PolicyEntry();
        entry.setUseCache(false);
        map.setDefaultEntry(entry);
        broker.setDestinationPolicy(map);

        configurePersistence(broker, delete);

        broker.start();
        LOG.info("Starting broker..");
    }

    protected void configurePersistence(BrokerService brokerService, boolean deleteAllOnStart) throws Exception {
        KahaDBPersistenceAdapter adapter = (KahaDBPersistenceAdapter) brokerService.getPersistenceAdapter();

        // ensure there are a bunch of data files but multiple entries in each
        adapter.setJournalMaxFileLength(1024 * 20);

        // speed up the test case, checkpoint an cleanup early and often
        adapter.setCheckpointInterval(500);
        adapter.setCleanupInterval(500);

        if (!deleteAllOnStart) {
            adapter.setForceRecoverIndex(true);
        }

    }

    private boolean deleteDir(File dir) {
        if (dir.isDirectory()) {
            String[] children = dir.list();
            for (int i = 0; i < children.length; i++) {
                boolean success = deleteDir(new File(dir, children[i]));
                if (!success) {
                    return false;
                }
            }
        }

        return dir.delete();
    }

    private int getFileCount(File dir){
        if (dir.isDirectory()) {
            String[] children = dir.list();
            return children.length;
        }

        return 0;
    }

    @Test
    public void testCleanupOfFiles() throws Exception {
        final int messageCount = 500;
        startBroker(true);
        int fileCount = getFileCount(kahaDbDir);
        assertEquals(4, fileCount);

        Connection connection = new ActiveMQConnectionFactory(
                broker.getTransportConnectors().get(0).getConnectUri()).createConnection();
        connection.start();
        Session producerSess = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
        Session consumerSess = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);

        ProducerThread producer = new ProducerThread(producerSess, destination) {
            @Override
            protected Message createMessage(int i) throws Exception {
                return sess.createTextMessage(payload + "::" + i);
            }
        };
        producer.setSleep(650);
        producer.setMessageCount(messageCount);
        ConsumerThread consumer = new ConsumerThread(consumerSess, destination);
        consumer.setBreakOnNull(false);
        consumer.setMessageCount(messageCount);

        producer.start();
        consumer.start();

        producer.join();
        consumer.join();

        assertEquals("consumer got all produced messages", producer.getMessageCount(), consumer.getReceived());

        broker.stop();
        broker.waitUntilStopped();

    }

}

Other ActiveMQ examples (source code examples)

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