ActiveMQ example source code file (BrokerQueueNetworkWithDisconnectTest.java)

This example ActiveMQ source code file (BrokerQueueNetworkWithDisconnectTest.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

brokeritem, exception, exception, hub, hub, message_count, message_count, net, network, networkconnector, object, override, spoke, string, threading, threads, uri, uri, util

The ActiveMQ BrokerQueueNetworkWithDisconnectTest.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.usecases;

import java.net.URI;
import java.util.List;
import java.util.concurrent.TimeUnit;
import javax.jms.Destination;
import javax.jms.MessageConsumer;
import javax.jms.TextMessage;

import junit.framework.Test;

import org.apache.activemq.JmsMultipleBrokersTestSupport;
import org.apache.activemq.broker.BrokerPlugin;
import org.apache.activemq.broker.BrokerPluginSupport;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.broker.ConnectionContext;
import org.apache.activemq.broker.TransportConnector;
import org.apache.activemq.command.ConnectionInfo;
import org.apache.activemq.network.DiscoveryNetworkConnector;
import org.apache.activemq.network.NetworkConnector;
import org.apache.activemq.transport.vm.VMTransportFactory;
import org.apache.activemq.util.MessageIdList;
import org.apache.activemq.util.SocketProxy;
import org.apache.activemq.util.Wait;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;


public class BrokerQueueNetworkWithDisconnectTest extends JmsMultipleBrokersTestSupport {
    private static final Log LOG = LogFactory.getLog(BrokerQueueNetworkWithDisconnectTest.class);
    private static final int NETWORK_DOWN_TIME = 5000;
    protected static final int MESSAGE_COUNT = 200;
    private static final String HUB = "HubBroker";
    private static final String SPOKE = "SpokeBroker";
    private SocketProxy socketProxy;
    private long networkDownTimeStart;
    public boolean useDuplexNetworkBridge = true;
    public boolean sumulateStalledNetwork;
    private long inactiveDuration = 1000;
    private boolean useSocketProxy = true;

   
    public void initCombosForTestSendOnAReceiveOnBWithTransportDisconnect() {
        addCombinationValues( "useDuplexNetworkBridge", new Object[]{ Boolean.TRUE, Boolean.FALSE} );
        addCombinationValues( "sumulateStalledNetwork", new Object[]{ Boolean.TRUE } );
    }
    
    public void testSendOnAReceiveOnBWithTransportDisconnect() throws Exception {
        bridgeBrokers(SPOKE, HUB);

        startAllBrokers();

        // Setup destination
        Destination dest = createDestination("TEST.FOO", false);
        
        // Setup consumers
        MessageConsumer client = createConsumer(HUB, dest);
        
        // allow subscription information to flow back to Spoke
        sleep(600);
        
        // Send messages
        sendMessages(SPOKE, dest, MESSAGE_COUNT);

        MessageIdList msgs = getConsumerMessages(HUB, client);
        msgs.waitForMessagesToArrive(MESSAGE_COUNT);

        assertTrue("At least message " + MESSAGE_COUNT + 
                " must be recieved, duplicates are expected, count=" + msgs.getMessageCount(),
                MESSAGE_COUNT <= msgs.getMessageCount());
    }

    public void testNoStuckConnectionsWithTransportDisconnect() throws Exception {
        inactiveDuration=60000l;
        useDuplexNetworkBridge = true;

        bridgeBrokers(SPOKE, HUB);

        final BrokerItem hub = brokers.get(HUB);
        hub.broker.setPlugins(new BrokerPlugin[]{
                new BrokerPluginSupport() {
                    int sleepCount = 2;
                    @Override
                    public void removeConnection(ConnectionContext context,
                            ConnectionInfo info, Throwable error)
                            throws Exception {
                        try {
                            while(--sleepCount >= 0) {
                                LOG.info("sleeping for a bit in close impl to simulate load where reconnect fails due to a pending close");
                                TimeUnit.SECONDS.sleep(2);
                            }
                        } catch (Exception ignored) {}
                        super.removeConnection(context, info, error);
                    }
                }
        });
        startAllBrokers();
        waitForBridgeFormation();

        // kill the initiator side, leaving remote end intact
        // simulate async network breakage
        // remote side will need to spot duplicate network and stop/kill the original
        for (int i=0; i< 3;  i++) {
            socketProxy.halfClose();
            sleep(10000);
        }
        // wait for full reformation of bridge       
        // verify no extra connections
        boolean allGood = Wait.waitFor(new Wait.Condition(){ 
                    public boolean isSatisified() throws Exception {
                        long numConnections = hub.broker.getTransportConnectors().get(0).getConnections().size();
                        LOG.info("Num connetions:" + numConnections);
                        return numConnections == 1;
                    }});
        if (!allGood) {
            dumpAllThreads("ExtraHubConnection");
        }
        assertTrue("should be only one transport connection for the single duplex network connector", allGood);

        allGood = Wait.waitFor(new Wait.Condition(){
                    public boolean isSatisified() throws Exception {
                        long numVmConnections = VMTransportFactory.SERVERS.get(HUB).getConnectionCount();
                        LOG.info("Num VM connetions:" + numVmConnections);
                        return numVmConnections == 1;
                    }});
        if (!allGood) {
            dumpAllThreads("ExtraHubVMConnection");
        }
        assertTrue("should be only one vm connection for the single network duplex network connector", allGood);
    }
    
    public void testTwoDuplexNCsAreAllowed() throws Exception {
        useDuplexNetworkBridge = true;
        useSocketProxy = false;

        NetworkConnector connector = bridgeBrokers(SPOKE, HUB);
        connector.setName("FirstDuplex");
        connector = bridgeBrokers(SPOKE, HUB);
        connector.setName("SecondDuplex");

        startAllBrokers(); 
        waitForBridgeFormation();

        BrokerItem hub = brokers.get(HUB);
        assertEquals("Has two transport Connectors", 2, hub.broker.getTransportConnectors().get(0).getConnections().size());
    }
    
    @Override
    protected void startAllBrokers() throws Exception {
        // Ensure HUB is started first so bridge will be active from the get go
        BrokerItem brokerItem = brokers.get(HUB);
        brokerItem.broker.start();
        brokerItem = brokers.get(SPOKE);
        brokerItem.broker.start();
        sleep(600);
    }

    public void setUp() throws Exception {
        networkDownTimeStart = 0;
        inactiveDuration = 1000;
        useSocketProxy = true;
        super.setAutoFail(true);
        super.setUp();
        final String options = "?persistent=true&useJmx=false&deleteAllMessagesOnStartup=true";
        createBroker(new URI("broker:(tcp://localhost:61617)/" + HUB + options));
        createBroker(new URI("broker:(tcp://localhost:61616)/" + SPOKE + options));
    }
    
    public void tearDown() throws Exception {
        super.tearDown();
        if (socketProxy != null) {
            socketProxy.close();
        }
    }
    
    public static Test suite() {
        return suite(BrokerQueueNetworkWithDisconnectTest.class);
    }
       
    @Override
    protected void onSend(int i, TextMessage msg) {
        sleep(50);
        if (i == 50 || i == 150) {
            if (sumulateStalledNetwork) {
                socketProxy.pause();
            } else {
                socketProxy.close();
            }
            networkDownTimeStart = System.currentTimeMillis();
        } else if (networkDownTimeStart > 0) {
             // restart after NETWORK_DOWN_TIME seconds
             if (networkDownTimeStart + NETWORK_DOWN_TIME < System.currentTimeMillis()) {
                 if (sumulateStalledNetwork) {
                     socketProxy.goOn();
                 } else {
                     socketProxy.reopen();
                 }
                 networkDownTimeStart = 0;
             } else {
                 // slow message production to allow bridge to recover and limit message duplication
                 sleep(500);
            }
        }
        super.onSend(i, msg);
    }

    private void sleep(int milliSecondTime) {
        try {
            Thread.sleep(milliSecondTime);
        } catch (InterruptedException igonred) {
        }    
    }

    @Override
    protected NetworkConnector bridgeBrokers(BrokerService localBroker, BrokerService remoteBroker, boolean dynamicOnly, int networkTTL, boolean conduit, boolean failover) throws Exception {
        List<TransportConnector> transportConnectors = remoteBroker.getTransportConnectors();
        URI remoteURI;
        if (!transportConnectors.isEmpty()) {
            remoteURI = ((TransportConnector)transportConnectors.get(0)).getConnectUri();
            if (useSocketProxy) {
                socketProxy = new SocketProxy(remoteURI);
                remoteURI = socketProxy.getUrl();
            }
            DiscoveryNetworkConnector connector = new DiscoveryNetworkConnector(new URI("static:(" + remoteURI 
                    + "?wireFormat.maxInactivityDuration=" + inactiveDuration + "&wireFormat.maxInactivityDurationInitalDelay=" + inactiveDuration + ")?useExponentialBackOff=false"));
            connector.setDynamicOnly(dynamicOnly);
            connector.setNetworkTTL(networkTTL);
            localBroker.addNetworkConnector(connector);
            maxSetupTime = 2000;
            if (useDuplexNetworkBridge) {
                connector.setDuplex(true);
            }
            return connector;
        } else {
            throw new Exception("Remote broker has no registered connectors.");
        }
    }
}