ActiveMQ example source code file (IndividualDeadLetterTest.java)

This example ActiveMQ source code file (IndividualDeadLetterTest.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, activemqqueue, activemqqueue, brokerservice, brokerservice, deadletterstrategy, deadlettertest, exception, exception, messageconsumer, policyentry, policymap, policymap, util, will

The ActiveMQ IndividualDeadLetterTest.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.policy;

import java.util.Enumeration;

import javax.jms.DeliveryMode;
import javax.jms.Destination;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.Queue;

import org.apache.activemq.ActiveMQConnection;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.broker.region.policy.DeadLetterStrategy;
import org.apache.activemq.broker.region.policy.IndividualDeadLetterStrategy;
import org.apache.activemq.broker.region.policy.PolicyEntry;
import org.apache.activemq.broker.region.policy.PolicyMap;
import org.apache.activemq.command.ActiveMQQueue;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * 
 */
public class IndividualDeadLetterTest extends DeadLetterTest {
    private static final Logger LOG = LoggerFactory.getLogger(IndividualDeadLetterTest.class);

    protected BrokerService createBroker() throws Exception {
        BrokerService broker = super.createBroker();

        PolicyEntry policy = new PolicyEntry();
        DeadLetterStrategy strategy = new IndividualDeadLetterStrategy();
        strategy.setProcessNonPersistent(true);
        policy.setDeadLetterStrategy(strategy);

        PolicyMap pMap = new PolicyMap();
        pMap.setDefaultEntry(policy);

        broker.setDestinationPolicy(pMap);

        return broker;
    }

    protected Destination createDlqDestination() {
        String prefix = topic ? "ActiveMQ.DLQ.Topic." : "ActiveMQ.DLQ.Queue.";
        return new ActiveMQQueue(prefix + getClass().getName() + "." + getName());
    }
    
    public void testDLQBrowsing() throws Exception {
        super.topic = false;
        deliveryMode = DeliveryMode.PERSISTENT;
        durableSubscriber = false;
        messageCount = 1;

        connection.start();

        ActiveMQConnection amqConnection = (ActiveMQConnection) connection;
        rollbackCount = amqConnection.getRedeliveryPolicy().getMaximumRedeliveries() + 1;
        LOG.info("Will redeliver messages: " + rollbackCount + " times");

        sendMessages();

        // now lets receive and rollback N times
        for (int i = 0; i < rollbackCount; i++) {
            makeConsumer();
            Message message = consumer.receive(5000);
            assertNotNull("No message received: ", message);

            session.rollback();
            LOG.info("Rolled back: " + rollbackCount + " times");
            consumer.close();
        }

        makeDlqBrowser();
        browseDlq();
        dlqBrowser.close();
        session.close();
        Thread.sleep(1000);
        session = connection.createSession(transactedMode, acknowledgeMode);
        Queue testQueue = new ActiveMQQueue("ActiveMQ.DLQ.Queue.ActiveMQ.DLQ.Queue." + getClass().getName() + "." + getName());
        MessageConsumer testConsumer = session.createConsumer(testQueue);
        assertNull("The message shouldn't be sent to another DLQ", testConsumer.receive(1000));

    }
    
    protected void browseDlq() throws Exception {
        Enumeration messages = dlqBrowser.getEnumeration();
        while (messages.hasMoreElements()) {
            LOG.info("Browsing: " + messages.nextElement());
        }
    }
}