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ActiveMQ example source code file (DbRestartJDBCQueueTest.java)

This example ActiveMQ source code file (DbRestartJDBCQueueTest.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

activemqconnectionfactory, activemqconnectionfactory, brokerservice, countdownlatch, db, db, defaultioexceptionhandler, embeddeddatasource, embeddeddatasource, exception, exception, jdbcpersistenceadapter, override, thread, threading, threads

The ActiveMQ DbRestartJDBCQueueTest.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.broker.ft;

import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import javax.jms.Connection;
import javax.jms.Destination;
import javax.jms.ExceptionListener;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageProducer;
import javax.jms.Session;
import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.JmsTopicSendReceiveWithTwoConnectionsTest;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.store.jdbc.DataSourceSupport;
import org.apache.activemq.store.jdbc.JDBCPersistenceAdapter;
import org.apache.activemq.util.DefaultIOExceptionHandler;
import org.apache.derby.jdbc.EmbeddedDataSource;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class DbRestartJDBCQueueTest extends JmsTopicSendReceiveWithTwoConnectionsTest implements ExceptionListener {
    private static final transient Logger LOG = LoggerFactory.getLogger(DbRestartJDBCQueueTest.class);

    public boolean transactedSends = false;
    public int failureCount = 25;  // or 20 for even tx batch boundary

    int inflightMessageCount = 0;
    EmbeddedDataSource sharedDs;
    BrokerService broker;
    final CountDownLatch restartDBLatch = new CountDownLatch(1);

    protected void setUp() throws Exception {
        setAutoFail(true);
        topic = false;
        verbose = true;
        // startup db
        sharedDs = (EmbeddedDataSource) new DataSourceSupport().getDataSource();

        broker = new BrokerService();

        DefaultIOExceptionHandler handler = new DefaultIOExceptionHandler();
        handler.setIgnoreSQLExceptions(false);
        handler.setStopStartConnectors(true);
        broker.setIoExceptionHandler(handler);
        broker.addConnector("tcp://localhost:0");
        broker.setUseJmx(false);
        broker.setPersistent(true);
        broker.setDeleteAllMessagesOnStartup(true);
        JDBCPersistenceAdapter persistenceAdapter = new JDBCPersistenceAdapter();
        persistenceAdapter.setDataSource(sharedDs);
        persistenceAdapter.setUseDatabaseLock(false);
        persistenceAdapter.setLockKeepAlivePeriod(500);
        persistenceAdapter.setLockAcquireSleepInterval(500);
        broker.setPersistenceAdapter(persistenceAdapter);
        broker.start();
        super.setUp();
    }

    protected void tearDown() throws  Exception {
       super.tearDown();
        broker.stop();
    }


    protected Session createSendSession(Connection sendConnection) throws Exception {
        if (transactedSends) {
            return sendConnection.createSession(true, Session.SESSION_TRANSACTED);
        } else {
            return sendConnection.createSession(false, Session.AUTO_ACKNOWLEDGE);
        }
    }

    protected ActiveMQConnectionFactory createConnectionFactory() throws Exception {
        ActiveMQConnectionFactory f =
                new ActiveMQConnectionFactory("failover://" + broker.getTransportConnectors().get(0).getPublishableConnectString());
        f.setExceptionListener(this);
        return f;
    }

    @Override
    protected void messageSent() throws Exception {    
        if (++inflightMessageCount == failureCount) {
            LOG.info("STOPPING DB!@!!!!");
            final EmbeddedDataSource ds = sharedDs;
            ds.setShutdownDatabase("shutdown");
            try {
                ds.getConnection();
            } catch (Exception ignored) {
            }
            LOG.info("DB STOPPED!@!!!!");
            
            Thread dbRestartThread = new Thread("db-re-start-thread") {
                public void run() {
                    LOG.info("Sleeping for 10 seconds before allowing db restart");
                    try {
                        restartDBLatch.await(10, TimeUnit.SECONDS);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    ds.setShutdownDatabase("false");
                    LOG.info("DB RESTARTED!@!!!!");
                }
            };
            dbRestartThread.start();
        }
    }
     
    protected void sendToProducer(MessageProducer producer,
            Destination producerDestination, Message message) throws JMSException {
        {   
            // do some retries as db failures filter back to the client until broker sees
            // db lock failure and shuts down
            boolean sent = false;
            do {
                try { 
                    producer.send(producerDestination, message);

                    if (transactedSends && ((inflightMessageCount+1) %10 == 0 || (inflightMessageCount+1) >= messageCount)) {
                        LOG.info("committing on send: " + inflightMessageCount + " message: " + message);
                        session.commit();
                    }

                    sent = true;
                } catch (JMSException e) {
                    LOG.info("Exception on producer send:", e);
                    try { 
                        Thread.sleep(2000);
                    } catch (InterruptedException ignored) {
                    }
                }
            } while(!sent);

        }
    }

    @Override
    public void onException(JMSException exception) {
        LOG.error("exception on connection: ", exception);
    }
}

Other ActiveMQ examples (source code examples)

Here is a short list of links related to this ActiveMQ DbRestartJDBCQueueTest.java source code file:

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