ActiveMQ example source code file (DuplexNetworkMBeanTest.java)

This example ActiveMQ source code file (DuplexNetworkMBeanTest.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

brokerservice, brokerservice, connection, connection, connector, connector, exception, exception, management, net, network, networkbridge, objectinstance, objectname, set, string, test, util

The ActiveMQ DuplexNetworkMBeanTest.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.network;

import static org.junit.Assert.assertEquals;
import static org.junit.Assume.assumeNotNull;

import java.net.MalformedURLException;
import java.util.Set;

import javax.management.MBeanServerConnection;
import javax.management.ObjectInstance;
import javax.management.ObjectName;
import javax.management.remote.JMXConnector;
import javax.management.remote.JMXConnectorFactory;
import javax.management.remote.JMXServiceURL;

import org.apache.activemq.broker.BrokerService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import org.junit.Test;

public class DuplexNetworkMBeanTest {

    protected static final Logger LOG = LoggerFactory.getLogger(DuplexNetworkMBeanTest.class);
    protected final int numRestarts = 3;

    protected BrokerService createBroker() throws Exception {
        BrokerService broker = new BrokerService();
        broker.setBrokerName("broker");
        broker.addConnector("tcp://localhost:61617?transport.reuseAddress=true");
        
        return broker;
    }
    
    protected BrokerService createNetworkedBroker() throws Exception {
        BrokerService broker = new BrokerService();
        broker.setBrokerName("networkedBroker");
        broker.addConnector("tcp://localhost:62617?transport.reuseAddress=true");
        NetworkConnector networkConnector = broker.addNetworkConnector("static:(tcp://localhost:61617?wireFormat.maxInactivityDuration=500)?useExponentialBackOff=false");
        networkConnector.setDuplex(true);
        return broker;
    }
    
    @Test
    public void testMbeanPresenceOnNetworkBrokerRestart() throws Exception {
        BrokerService broker = createBroker();
        broker.start();
        assertEquals(1, countMbeans(broker, "Connector", 30000));
        assertEquals(0, countMbeans(broker, "Connection"));
        BrokerService networkedBroker = null;
        for (int i=0; i<numRestarts; i++) {       
            networkedBroker = createNetworkedBroker();
            networkedBroker.start();
            assertEquals(1, countMbeans(networkedBroker, "NetworkBridge", 2000));
            assertEquals(1, countMbeans(broker, "NetworkBridge", 2000));
            assertEquals(1, countMbeans(broker, "Connection"));
            networkedBroker.stop();
            networkedBroker.waitUntilStopped();
            assertEquals(0, countMbeans(networkedBroker, "stopped"));
            assertEquals(0, countMbeans(broker, "NetworkBridge"));
        }
        
        assertEquals(0, countMbeans(networkedBroker, "NetworkBridge"));
        assertEquals(0, countMbeans(networkedBroker, "Connector"));
        assertEquals(0, countMbeans(networkedBroker, "Connection"));
        assertEquals(1, countMbeans(broker, "Connector"));
        broker.stop();
        broker.waitUntilStopped();
    }

    @Test
    public void testMbeanPresenceOnBrokerRestart() throws Exception {
        
        BrokerService networkedBroker = createNetworkedBroker();
        networkedBroker.start();
        assertEquals(1, countMbeans(networkedBroker, "Connector", 30000));
        assertEquals(0, countMbeans(networkedBroker, "Connection"));
        
        BrokerService broker = null;
        for (int i=0; i<numRestarts; i++) {
            broker = createBroker();
            broker.start();
            assertEquals(1, countMbeans(networkedBroker, "NetworkBridge", 5000));
            assertEquals("restart number: " + i, 1, countMbeans(broker, "Connection", 10000));
            
            broker.stop();
            broker.waitUntilStopped();
            assertEquals(0, countMbeans(broker, "stopped"));
        }
        
        //assertEquals(0, countMbeans(networkedBroker, "NetworkBridge"));
        assertEquals(1, countMbeans(networkedBroker, "Connector"));
        assertEquals(0, countMbeans(networkedBroker, "Connection"));
        assertEquals(0, countMbeans(broker, "Connection"));
        
        networkedBroker.stop();
        networkedBroker.waitUntilStopped();
    }
    
    private int countMbeans(BrokerService broker, String type) throws Exception {
        return countMbeans(broker, type, 0); 
    }

    private int countMbeans(BrokerService broker, String type, int timeout) throws Exception {
        final long expiryTime = System.currentTimeMillis() + timeout;
        final ObjectName beanName = new ObjectName("org.apache.activemq:BrokerName="
                + broker.getBrokerName() + ",Type=" + type +",*");
        Set<?> mbeans = null;
        int count = 0;
        do {
            if (timeout > 0) {
                Thread.sleep(100);
            }
            LOG.info("Query name: " + beanName);
            mbeans = broker.getManagementContext().queryNames(beanName, null);
            if (mbeans != null) {
                count = mbeans.size();
            } else {
                logAllMbeans(broker);
            }
        } while ((mbeans == null || mbeans.isEmpty()) && expiryTime > System.currentTimeMillis());
        
        // If port 1099 is in use when the Broker starts, starting the jmx
        // connector will fail.  So, if we have no mbsc to query, skip the
        // test.
        if (timeout > 0) {
            assumeNotNull(mbeans);
        }
        
        return count;
    }

    private void logAllMbeans(BrokerService broker) throws MalformedURLException {
        try {
            // trace all existing MBeans
            Set<?> all = broker.getManagementContext().queryNames(null, null);
            LOG.info("Total MBean count=" + all.size());
            for (Object o : all) {
                ObjectInstance bean = (ObjectInstance)o;
                LOG.info(bean.getObjectName().toString());
            }
        } catch (Exception ignored) {
            LOG.warn("getMBeanServer ex: " + ignored);
        }
    }
}