ActiveMQ example source code file (VirtualTopicSelectorTest.java)

This example ActiveMQ source code file (VirtualTopicSelectorTest.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

activemqqueue, brokerservice, brokerservice, destination, destination, destinationinterceptor, last, logger, messageconsumer, override, virtualdestinationinterceptor, virtualdestinationinterceptor, virtualtopic, virtualtopic

The ActiveMQ VirtualTopicSelectorTest.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.virtual;

import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.MessageConsumer;
import javax.jms.MessageProducer;
import javax.jms.Session;

import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.broker.region.DestinationInterceptor;
import org.apache.activemq.broker.region.virtual.VirtualDestination;
import org.apache.activemq.broker.region.virtual.VirtualDestinationInterceptor;
import org.apache.activemq.broker.region.virtual.VirtualTopic;
import org.apache.activemq.command.ActiveMQQueue;
import org.apache.activemq.command.ActiveMQTopic;
import org.apache.activemq.spring.ConsumerBean;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class VirtualTopicSelectorTest extends CompositeTopicTest {

    private static final Logger LOG = LoggerFactory.getLogger(VirtualTopicSelectorTest.class);
            
    protected Destination getConsumer1Dsetination() {
        return new ActiveMQQueue("Consumer.1.VirtualTopic.TEST");
    }

    protected Destination getConsumer2Dsetination() {
        return new ActiveMQQueue("Consumer.2.VirtualTopic.TEST");
    }
    
    protected Destination getProducerDestination() {
        return new ActiveMQTopic("VirtualTopic.TEST");
    }
    
    @Override
    protected void assertMessagesArrived(ConsumerBean messageList1, ConsumerBean messageList2) {
        messageList1.assertMessagesArrived(total/2);
        messageList2.assertMessagesArrived(total/2);
 
        messageList1.flushMessages();
        messageList2.flushMessages();
        
        LOG.info("validate no other messages on queues");
        try {
            Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
                
            Destination destination1 = getConsumer1Dsetination();
            Destination destination2 = getConsumer2Dsetination();
            MessageConsumer c1 = session.createConsumer(destination1, null);
            MessageConsumer c2 = session.createConsumer(destination2, null);
            c1.setMessageListener(messageList1);
            c2.setMessageListener(messageList2);
            
            
            LOG.info("send one simple message that should go to both consumers");
            MessageProducer producer = session.createProducer(getProducerDestination());
            assertNotNull(producer);
            
            producer.send(session.createTextMessage("Last Message"));
            
            messageList1.assertMessagesArrived(1);
            messageList2.assertMessagesArrived(1);
        
        } catch (JMSException e) {
            e.printStackTrace();
            fail("unexpeced ex while waiting for last messages: " + e);
        }
    }
    
    @Override
    protected BrokerService createBroker() throws Exception {
        // use message selectors on consumers that need to propagate up to the virtual
        // topic dispatch so that un matched messages do not linger on subscription queues
        messageSelector1 = "odd = 'yes'";
        messageSelector2 = "odd = 'no'";
        
        BrokerService broker = new BrokerService();
        broker.setPersistent(false);

        VirtualTopic virtualTopic = new VirtualTopic();
        // the new config that enables selectors on the intercepter
        virtualTopic.setSelectorAware(true);
        VirtualDestinationInterceptor interceptor = new VirtualDestinationInterceptor();
        interceptor.setVirtualDestinations(new VirtualDestination[]{virtualTopic});
        broker.setDestinationInterceptors(new DestinationInterceptor[]{interceptor});
        return broker;
    }
}