AMQStackOverFlowTest.java

/**
 * 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.usecases;

import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.Session;
import javax.jms.TextMessage;
import java.net.URI;
import java.util.ArrayList;
import java.util.List;

import junit.framework.TestCase;

import org.apache.activemq.ActiveMQConnectionFactory;
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.network.DiscoveryNetworkConnector;
import org.apache.activemq.network.NetworkConnector;
import org.apache.activemq.usage.SystemUsage;
import org.springframework.jms.core.JmsTemplate;
import org.springframework.jms.core.MessageCreator;

public class AMQStackOverFlowTest extends TestCase {

   private static final String URL1 = "tcp://localhost:61616";

   private static final String URL2 = "tcp://localhost:61617";

   public void testStackOverflow() throws Exception {
      BrokerService brokerService1 = null;
      BrokerService brokerService2 = null;

      try {
         brokerService1 = createBrokerService("broker1", URL1, URL2);
         brokerService1.start();
         brokerService2 = createBrokerService("broker2", URL2, URL1);
         brokerService2.start();

         final ActiveMQConnectionFactory cf1 = new ActiveMQConnectionFactory(URL1);
         cf1.setUseAsyncSend(false);

         final ActiveMQConnectionFactory cf2 = new ActiveMQConnectionFactory(URL2);
         cf2.setUseAsyncSend(false);

         final JmsTemplate template1 = new JmsTemplate(cf1);
         template1.setReceiveTimeout(10000);

         template1.send("test.q", new MessageCreator() {

            @Override
            public Message createMessage(Session session) throws JMSException {
               return session.createTextMessage("test");
            }

         });

         final JmsTemplate template2 = new JmsTemplate(cf2);
         template2.setReceiveTimeout(10000);

         final Message m = template2.receive("test.q");
         assertTrue(m instanceof TextMessage);

         final TextMessage tm = (TextMessage) m;

         assertEquals("test", tm.getText());

         template2.send("test2.q", new MessageCreator() {

            @Override
            public Message createMessage(Session session) throws JMSException {
               return session.createTextMessage("test2");
            }
         });

         final Message m2 = template1.receive("test2.q");
         assertNotNull(m2);
         assertTrue(m2 instanceof TextMessage);

         final TextMessage tm2 = (TextMessage) m2;

         assertEquals("test2", tm2.getText());

      } finally {
         brokerService1.stop();
         brokerService1 = null;
         brokerService2.stop();
         brokerService2 = null;
      }
   }

   private BrokerService createBrokerService(final String brokerName,
                                             final String uri1,
                                             final String uri2) throws Exception {
      final BrokerService brokerService = new BrokerService();

      brokerService.setBrokerName(brokerName);
      brokerService.setPersistent(false);
      brokerService.setUseJmx(true);

      final SystemUsage memoryManager = new SystemUsage();
      //memoryManager.getMemoryUsage().setLimit(10);
      brokerService.setSystemUsage(memoryManager);

      final List<PolicyEntry> policyEntries = new ArrayList<>();

      final PolicyEntry entry = new PolicyEntry();
      entry.setQueue(">");
      //entry.setMemoryLimit(1);
      policyEntries.add(entry);

      final PolicyMap policyMap = new PolicyMap();
      policyMap.setPolicyEntries(policyEntries);
      brokerService.setDestinationPolicy(policyMap);

      final TransportConnector tConnector = new TransportConnector();
      tConnector.setUri(new URI(uri1));
      tConnector.setName(brokerName + ".transportConnector");
      brokerService.addConnector(tConnector);

      if (uri2 != null) {
         final NetworkConnector nc = new DiscoveryNetworkConnector(new URI("static:" + uri2));
         nc.setBridgeTempDestinations(true);
         nc.setBrokerName(brokerName);
         //nc.setPrefetchSize(1);
         brokerService.addNetworkConnector(nc);
      }

      return brokerService;
   }
}