ActiveMQ example source code file (PerDestinationStoreLimitTest.java)

This example ActiveMQ source code file (PerDestinationStoreLimitTest.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

activemqdestination, atomicboolean, atomicboolean, atomiclong, brokerservice, brokerservice, countdownlatch, exception, exception, io, policyentry, redeliverypolicy, string, textmessage, thread, threading, threads

The ActiveMQ PerDestinationStoreLimitTest.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;

import java.io.IOException;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicLong;

import javax.jms.ConnectionFactory;
import javax.jms.JMSException;
import javax.jms.MessageConsumer;
import javax.jms.MessageProducer;
import javax.jms.Session;
import javax.jms.TextMessage;
import javax.jms.Topic;

import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.broker.TransportConnector;
import org.apache.activemq.broker.region.policy.PolicyEntry;
import org.apache.activemq.broker.region.policy.PolicyMap;
import org.apache.activemq.command.ActiveMQDestination;
import org.apache.activemq.command.ActiveMQQueue;
import org.apache.activemq.command.ActiveMQTopic;
import org.apache.activemq.transport.tcp.TcpTransport;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

// see: https://issues.apache.org/activemq/browse/AMQ-2668
public class PerDestinationStoreLimitTest extends JmsTestSupport {
    static final Logger LOG = LoggerFactory.getLogger(PerDestinationStoreLimitTest.class);
    final String oneKb = new String(new byte[1024]);
    
    ActiveMQDestination queueDest = new ActiveMQQueue("PerDestinationStoreLimitTest.Queue");
    ActiveMQDestination topicDest = new ActiveMQTopic("PerDestinationStoreLimitTest.Topic");

    protected TransportConnector connector;
    protected ActiveMQConnection connection;
    
    public void testDLQAfterBlockTopic() throws Exception {
        doTestDLQAfterBlock(topicDest);
    }
    
    public void testDLQAfterBlockQueue() throws Exception {
        doTestDLQAfterBlock(queueDest);
    }
    
    public void doTestDLQAfterBlock(ActiveMQDestination destination) throws Exception {
        ActiveMQConnectionFactory factory = (ActiveMQConnectionFactory)createConnectionFactory();
        RedeliveryPolicy redeliveryPolicy = new RedeliveryPolicy();
        // Immediately sent to the DLQ on rollback, no redelivery
        redeliveryPolicy.setMaximumRedeliveries(0);
        factory.setRedeliveryPolicy(redeliveryPolicy);
        
        // Separate connection for consumer so it will not be blocked by filler thread
        // sending when it blocks
        connection = (ActiveMQConnection)factory.createConnection();
        connections.add(connection);
        connection.setClientID("someId");
        connection.start();

        final Session consumerSession = connection.createSession(true, Session.SESSION_TRANSACTED);      
        MessageConsumer consumer = destination.isQueue() ?
                    consumerSession.createConsumer(destination) :
                    consumerSession.createDurableSubscriber((Topic) destination, "Durable");
        
        connection = (ActiveMQConnection)factory.createConnection();
        connections.add(connection);
        connection.start();

        final Session session = connection.createSession(true, Session.SESSION_TRANSACTED);
        final MessageProducer producer = session.createProducer(destination);
        
        final AtomicBoolean done = new AtomicBoolean(true);
        final AtomicBoolean keepGoing = new AtomicBoolean(true);
        final CountDownLatch fillerStarted = new CountDownLatch(1);

        final AtomicLong sent = new AtomicLong(0);
        Thread thread = new Thread("Filler") {
            int i;
            @Override
            public void run() {
                while (keepGoing.get()) {
                    done.set(false);
                    fillerStarted.countDown();
                    try {
                        producer.send(session.createTextMessage(oneKb + ++i));
                        if (i%10 == 0) {
                            session.commit();
                            sent.getAndAdd(10);
                            LOG.info("committed/sent: " + sent.get());
                        }
                        LOG.info("sent: " + i);
                    } catch (JMSException e) {
                    }
                }
            }
        };
        thread.start();
		
        assertTrue("filler started..", fillerStarted.await(20, TimeUnit.SECONDS));
        waitForBlocked(done);

        // consume and rollback some so message gets to DLQ
        connection = (ActiveMQConnection)factory.createConnection();
        connections.add(connection);
        connection.start();
        TextMessage msg;
        int received = 0;
        for (;received < sent.get(); ++received) {
        	msg = (TextMessage) consumer.receive(4000);
        	if (msg == null) {
        	    LOG.info("received null on count: " + received);
        	    break;
        	}
        	LOG.info("received: " + received + ", msg: " + msg.getJMSMessageID());
        	if (received%5==0) {
        	    if (received%3==0) {
        	        // force the use of the DLQ which will use some more store
        	        LOG.info("rollback on : " + received);
        	        consumerSession.rollback();
        	    } else {
        	        LOG.info("commit on : " + received);
        	        consumerSession.commit();
        	    }
        	}
        }
        LOG.info("Done:: sent: " + sent.get() + ", received: " + received);
        keepGoing.set(false);
        assertTrue("some were sent:", sent.get() > 0);
        assertEquals("received what was committed", sent.get(), received);	
    }

    protected void waitForBlocked(final AtomicBoolean done)
            throws InterruptedException {
        while (true) {
            Thread.sleep(1000);
            // the producer is blocked once the done flag stays true
            if (done.get()) {
                LOG.info("Blocked....");
                break;
            }
            done.set(true);
        }
    }

    protected BrokerService createBroker() throws Exception {
        BrokerService service = new BrokerService();
        service.setDeleteAllMessagesOnStartup(true);
        
        service.setUseJmx(false);

        service.getSystemUsage().getStoreUsage().setLimit(200*1024);
        
        // allow destination to use 50% of store, leaving 50% for DLQ.
        PolicyMap policyMap = new PolicyMap();
        PolicyEntry policy = new PolicyEntry();
        policy.setStoreUsageHighWaterMark(50);
        policyMap.put(queueDest, policy);
        policyMap.put(topicDest, policy);
        service.setDestinationPolicy(policyMap);

        connector = service.addConnector("tcp://localhost:0");
        return service;
    }

    public void setUp() throws Exception {
        setAutoFail(true);
        super.setUp();
    }
    
    protected void tearDown() throws Exception {
        if (connection != null) {
            TcpTransport t = (TcpTransport)connection.getTransport().narrow(TcpTransport.class);
            t.getTransportListener().onException(new IOException("Disposed."));
            connection.getTransport().stop();
            super.tearDown();
        }
    }

    protected ConnectionFactory createConnectionFactory() throws Exception {
        return new ActiveMQConnectionFactory(connector.getConnectUri());
    }
}