ActiveMQ example source code file (NoConsumerDeadLetterTest.java)

This example ActiveMQ source code file (NoConsumerDeadLetterTest.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, deadlettertestsupport, exception, exception, message, message, messageconsumer, messageproducer, policyentry, policymap, policymap, textmessage

The ActiveMQ NoConsumerDeadLetterTest.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 javax.jms.DeliveryMode;
import javax.jms.Destination;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageProducer;
import javax.jms.Session;
import javax.jms.TextMessage;
import javax.jms.Topic;

import org.apache.activemq.ActiveMQConnection;
import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.advisory.AdvisorySupport;
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.ActiveMQDestination;
import org.apache.activemq.command.ActiveMQQueue;

/**
 * 
 */
public class NoConsumerDeadLetterTest extends DeadLetterTestSupport {

    // lets disable the inapplicable tests
    public void testDurableQueueMessage() throws Exception {
    }

    public void testDurableTopicMessage() throws Exception {
    }

    protected void doTest() throws Exception {
        makeDlqConsumer();
        sendMessages();

        for (int i = 0; i < messageCount; i++) {
            Message msg = dlqConsumer.receive(1000);
            assertNotNull("Should be a message for loop: " + i, msg);
        }
    }
    
    public void testConsumerReceivesMessages() throws Exception {
    	this.topic = false;
        ActiveMQConnectionFactory factory = (ActiveMQConnectionFactory)createConnectionFactory();
        connection = (ActiveMQConnection)factory.createConnection();
        connection.start();

        Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
        MessageProducer producer = session.createProducer(getDestination());
        producer.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
   
        Topic advisoryTopic = AdvisorySupport.getNoQueueConsumersAdvisoryTopic(getDestination());
        MessageConsumer advisoryConsumer = session.createConsumer(advisoryTopic);
        
        TextMessage msg = session.createTextMessage("Message: x");
        producer.send(msg);
        
        Message advisoryMessage = advisoryConsumer.receive(1000);
        assertNotNull("Advisory message not received", advisoryMessage);
        
        Thread.sleep(1000);
        
        factory = (ActiveMQConnectionFactory)createConnectionFactory();
        connection = (ActiveMQConnection)factory.createConnection();
        connection.start();
        
        session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
        
        MessageConsumer consumer = session.createConsumer(getDestination());
        Message received = consumer.receive(1000);
        assertNotNull("Message not received", received);
    }

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

        PolicyEntry policy = new PolicyEntry();
        policy.setSendAdvisoryIfNoConsumers(true);

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

        broker.setDestinationPolicy(pMap);

        return broker;
    }

    protected Destination createDlqDestination() {
    	if (this.topic) {
    		return AdvisorySupport.getNoTopicConsumersAdvisoryTopic((ActiveMQDestination)getDestination());
    	} else {
    		return AdvisorySupport.getNoQueueConsumersAdvisoryTopic((ActiveMQDestination)getDestination());
    	}
    }

}