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ActiveMQ example source code file (DiscoveryNetworkReconnectTest.java)

This example ActiveMQ source code file (DiscoveryNetworkReconnectTest.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, customaction, exception, exception, management, net, network, networkbridgeobjectnamematcher, networkbridgeobjectnamematcher, networkconnectorname, object, objectname, objectname, semaphore, semaphore, test, threading, threads, type

The ActiveMQ DiscoveryNetworkReconnectTest.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.transport.discovery;

import static org.junit.Assert.assertTrue;

import java.net.URI;
import java.util.concurrent.Semaphore;
import java.util.concurrent.TimeUnit;

import javax.management.ObjectInstance;
import javax.management.ObjectName;

import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.broker.jmx.ManagementContext;
import org.apache.activemq.transport.discovery.multicast.MulticastDiscoveryAgentFactory;
import org.apache.activemq.util.SocketProxy;
import org.apache.activemq.util.Wait;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.hamcrest.BaseMatcher;
import org.hamcrest.Description;
import org.jmock.Expectations;
import org.jmock.Mockery;
import org.jmock.api.Invocation;
import org.jmock.integration.junit4.JMock;
import org.jmock.integration.junit4.JUnit4Mockery;
import org.jmock.lib.action.CustomAction;
import org.jmock.lib.legacy.ClassImposteriser;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;


@RunWith(JMock.class)
public class DiscoveryNetworkReconnectTest {

    private static final Logger LOG = LoggerFactory.getLogger(DiscoveryNetworkReconnectTest.class);
    final int maxReconnects = 5;
    final String groupName = "GroupID-" + "DiscoveryNetworkReconnectTest";
    final String discoveryAddress = "multicast://default?group=" + groupName + "&initialReconnectDelay=1000";
    final Semaphore mbeanRegistered = new Semaphore(0);
    final Semaphore mbeanUnregistered = new Semaphore(0);
    BrokerService brokerA, brokerB;
    Mockery context;
    ManagementContext managementContext;
    DiscoveryAgent agent;
    SocketProxy proxy;
    
    // ignore the hostname resolution component as this is machine dependent
    class NetworkBridgeObjectNameMatcher<T> extends BaseMatcher {
        T name;
        NetworkBridgeObjectNameMatcher(T o) {
            name = o;
        }
        
        public boolean matches(Object arg0) {
            ObjectName other = (ObjectName) arg0;
            ObjectName mine = (ObjectName) name;
            return other.getKeyProperty("Type").equals(mine.getKeyProperty("Type")) &&
                other.getKeyProperty("NetworkConnectorName").equals(mine.getKeyProperty("NetworkConnectorName"));
        }

        public void describeTo(Description arg0) {
            arg0.appendText(this.getClass().getName());
        }       
    }
    
    @Before
    public void setUp() throws Exception {
        context = new JUnit4Mockery() {{
            setImposteriser(ClassImposteriser.INSTANCE);
        }};
        brokerA = new BrokerService();
        brokerA.setBrokerName("BrokerA");
        configure(brokerA);
        brokerA.addConnector("tcp://localhost:0");
        brokerA.start();
        brokerA.waitUntilStarted();
        
        proxy = new SocketProxy(brokerA.getTransportConnectors().get(0).getConnectUri());
        managementContext = context.mock(ManagementContext.class);
        
        context.checking(new Expectations(){{
            allowing (managementContext).getJmxDomainName(); will (returnValue("Test"));
            allowing (managementContext).start();
            allowing (managementContext).isCreateConnector();
            allowing (managementContext).stop();
            allowing (managementContext).isConnectorStarted();
            
            // expected MBeans
            allowing (managementContext).registerMBean(with(any(Object.class)), with(equal(
                    new ObjectName("Test:BrokerName=BrokerNC,Type=Broker"))));
            allowing (managementContext).registerMBean(with(any(Object.class)), with(equal(
                    new ObjectName("Test:BrokerName=BrokerNC,Type=NetworkConnector,NetworkConnectorName=NC"))));
            allowing (managementContext).registerMBean(with(any(Object.class)), with(equal(            
                    new ObjectName("Test:BrokerName=BrokerNC,Type=Topic,Destination=ActiveMQ.Advisory.Connection"))));
            allowing (managementContext).registerMBean(with(any(Object.class)), with(equal(
                    new ObjectName("Test:BrokerName=BrokerNC,Type=Topic,Destination=ActiveMQ.Advisory.NetworkBridge"))));
            allowing (managementContext).registerMBean(with(any(Object.class)), with(equal(            
                    new ObjectName("Test:BrokerName=BrokerNC,Type=jobScheduler,jobSchedulerName=JMS"))));
            
            atLeast(maxReconnects - 1).of (managementContext).registerMBean(with(any(Object.class)), with(new NetworkBridgeObjectNameMatcher<ObjectName>(
                        new ObjectName("Test:BrokerName=BrokerNC,Type=NetworkBridge,NetworkConnectorName=NC,Name=localhost/127.0.0.1_" 
                            + proxy.getUrl().getPort())))); will(new CustomAction("signal register network mbean") {
                                public Object invoke(Invocation invocation) throws Throwable {
                                    LOG.info("Mbean Registered: " + invocation.getParameter(0));
                                    mbeanRegistered.release();
                                    return new ObjectInstance((ObjectName)invocation.getParameter(0), "dscription");
                                }
                            });
            atLeast(maxReconnects - 1).of (managementContext).unregisterMBean(with(new NetworkBridgeObjectNameMatcher<ObjectName>(
                    new ObjectName("Test:BrokerName=BrokerNC,Type=NetworkBridge,NetworkConnectorName=NC,Name=localhost/127.0.0.1_" 
                            + proxy.getUrl().getPort())))); will(new CustomAction("signal unregister network mbean") {
                                public Object invoke(Invocation invocation) throws Throwable {
                                    LOG.info("Mbean Unregistered: " + invocation.getParameter(0));
                                    mbeanUnregistered.release();
                                    return null;
                                }
                            });
           
            allowing (managementContext).unregisterMBean(with(equal(
                    new ObjectName("Test:BrokerName=BrokerNC,Type=Broker"))));
            allowing (managementContext).unregisterMBean(with(equal(
                    new ObjectName("Test:BrokerName=BrokerNC,Type=NetworkConnector,NetworkConnectorName=NC"))));
            allowing (managementContext).unregisterMBean(with(equal(            
                    new ObjectName("Test:BrokerName=BrokerNC,Type=Topic,Destination=ActiveMQ.Advisory.Connection"))));
            allowing (managementContext).unregisterMBean(with(equal(
                    new ObjectName("Test:BrokerName=BrokerNC,Type=Topic,Destination=ActiveMQ.Advisory.NetworkBridge"))));
        }});
        
        brokerB = new BrokerService();
        brokerB.setManagementContext(managementContext);
        brokerB.setBrokerName("BrokerNC");
        configure(brokerB);
    }

    @After
    public void tearDown() throws Exception {
        brokerA.stop();
        brokerA.waitUntilStopped();
        brokerB.stop();
        brokerB.waitUntilStopped();
        proxy.close();
    }
    
    private void configure(BrokerService broker) {
        broker.setPersistent(false);
        broker.setUseJmx(true);      
    }
    
    @Test
    public void testMulicastReconnect() throws Exception {     
        
        // control multicast advertise agent to inject proxy
        agent = MulticastDiscoveryAgentFactory.createDiscoveryAgent(new URI(discoveryAddress));
        agent.registerService(proxy.getUrl().toString());
        agent.start();

        brokerB.addNetworkConnector(discoveryAddress + "&wireFormat.maxInactivityDuration=1000&wireFormat.maxInactivityDurationInitalDelay=1000");
        brokerB.start();
        brokerB.waitUntilStarted();
        doReconnect();
    }
    
    

    @Test
    public void testSimpleReconnect() throws Exception {
        brokerB.addNetworkConnector("simple://(" + proxy.getUrl() 
                + ")?useExponentialBackOff=false&initialReconnectDelay=500&wireFormat.maxInactivityDuration=1000&wireFormat.maxInactivityDurationInitalDelay=1000");
        brokerB.start();   
        brokerB.waitUntilStarted();
        doReconnect();
    }

    private void doReconnect() throws Exception {
        
        for (int i=0; i<maxReconnects; i++) {
            // Wait for connection
            assertTrue("we got a network connection in a timely manner", Wait.waitFor(new Wait.Condition() {
                public boolean isSatisified() throws Exception {
                   return proxy.connections.size() >= 1;
                }
            }));
            
            // wait for network connector
            assertTrue("network connector mbean registered within 3 minute", mbeanRegistered.tryAcquire(180, TimeUnit.SECONDS));
            
            // force an inactivity timeout via the proxy
            proxy.pause();
        
            // wait for the inactivity timeout and network shutdown
            assertTrue("network connector mbean unregistered within 3 minute", mbeanUnregistered.tryAcquire(180, TimeUnit.SECONDS));
            
            // whack all connections
            proxy.close();
            
            // let a reconnect succeed
            proxy.reopen();       
        }
    }
}

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