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ActiveMQ example source code file (NetworkOfTwentyBrokersTest.java)

This example ActiveMQ source code file (NetworkOfTwentyBrokersTest.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

a, a, b, b, broker, brokerservice, brokerservice, exception, exception, net, network, networkconnector, override, uri, util, waiting, x

The ActiveMQ NetworkOfTwentyBrokersTest.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.Collection;
import java.util.Iterator;
import java.util.List;
import org.apache.activemq.JmsMultipleBrokersTestSupport;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.broker.TransportConnector;
import org.apache.activemq.broker.region.RegionBroker;
import org.apache.activemq.command.BrokerInfo;
import org.apache.activemq.network.NetworkConnector;
import org.apache.activemq.util.ThreadTracker;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class NetworkOfTwentyBrokersTest extends JmsMultipleBrokersTestSupport {
    private static final Logger LOG = LoggerFactory.getLogger(NetworkOfTwentyBrokersTest.class);

    // This will interconnect all brokers using multicast
    protected void bridgeAllBrokers() throws Exception {
        bridgeAllBrokers("TwentyBrokersTest", 1, false, false);
    }

    protected void bridgeAllBrokers(String groupName, int ttl, boolean suppressduplicateQueueSubs) throws Exception {
        bridgeAllBrokers(groupName, ttl, suppressduplicateQueueSubs, false);
    }

    protected void bridgeAllBrokers(String groupName, int ttl, boolean suppressduplicateQueueSubs, boolean decreasePriority) throws Exception {
        Collection<BrokerItem> brokerList = brokers.values();
        for (Iterator<BrokerItem> i = brokerList.iterator(); i.hasNext();) {
            BrokerService broker = i.next().broker;
            List<TransportConnector> transportConnectors = broker.getTransportConnectors();

            if (transportConnectors.isEmpty()) {
                broker.addConnector(new URI(AUTO_ASSIGN_TRANSPORT));
                transportConnectors = broker.getTransportConnectors();
            }

            TransportConnector transport = transportConnectors.get(0);
            if (transport.getDiscoveryUri() == null) {
                transport.setDiscoveryUri(new URI("multicast://default?group=" + groupName));
            }

            List<NetworkConnector> networkConnectors = broker.getNetworkConnectors();
            if (networkConnectors.isEmpty()) {
                broker.addNetworkConnector("multicast://default?group=" + groupName);
                networkConnectors = broker.getNetworkConnectors();
            }

            NetworkConnector nc = networkConnectors.get(0);
            nc.setNetworkTTL(ttl);
            nc.setSuppressDuplicateQueueSubscriptions(suppressduplicateQueueSubs);
            nc.setDecreaseNetworkConsumerPriority(decreasePriority);
        }

        // Multicasting may take longer to setup
        maxSetupTime = 8000;
    }

    protected BrokerService createBroker(String brokerName) throws Exception {
        BrokerService broker = new BrokerService();
        broker.setPersistent(false);
        broker.setUseJmx(false);
        broker.setBrokerName(brokerName);
        broker.addConnector(new URI(AUTO_ASSIGN_TRANSPORT));
        brokers.put(brokerName, new BrokerItem(broker));

        return broker;
    }

    /* AMQ-3077 Bug */
    public void testBrokers() throws Exception {
        int X = 20;
        int i;

        LOG.info("Creating X Brokers");
        for (i = 0; i < X; i++) {
            createBroker("Broker" + i);
        }

        bridgeAllBrokers();
        startAllBrokers();
        waitForBridgeFormation(X-1);

        LOG.info("Waiting for complete formation");
        try {
            Thread.sleep(10000);
        } catch (Exception e) {
        }

        verifyPeerBrokerInfos(X-1);

        LOG.info("Stopping half the brokers");
        for (i = 0; i < X/2; i++) {
            destroyBroker("Broker" + i);
        }

        LOG.info("Waiting for complete stop");
        try {
            Thread.sleep(10000);
        } catch (Exception e) {
        }

        verifyPeerBrokerInfos((X/2) -1);

        LOG.info("Recreating first half");
        for (i = 0; i < X/2; i++) {
            createBroker("Broker" + i);
        }

        bridgeAllBrokers();
        startAllBrokers();
        waitForBridgeFormation(X-1);

        LOG.info("Waiting for complete reformation");
        try {
            Thread.sleep(10000);
        } catch (Exception e) {
        }

        verifyPeerBrokerInfos(X-1);
    }

    public void testPeerBrokerCountHalfPeer() throws Exception {
        createBroker("A");
        createBroker("B");
        bridgeBrokers("A", "B");
        startAllBrokers();
        verifyPeerBrokerInfo(brokers.get("A"), 1);
        verifyPeerBrokerInfo(brokers.get("B"), 0);
    }

    public void testPeerBrokerCountHalfPeerTwice() throws Exception {
        createBroker("A");
        createBroker("B");
        bridgeBrokers("A", "B");
        bridgeBrokers("A", "B");
        startAllBrokers();
        verifyPeerBrokerInfo(brokers.get("A"), 1);
        verifyPeerBrokerInfo(brokers.get("B"), 0);
    }

    public void testPeerBrokerCountFullPeer() throws Exception {
        createBroker("A");
        createBroker("B");
        bridgeBrokers("A", "B");
        bridgeBrokers("B", "A");
        startAllBrokers();
        verifyPeerBrokerInfo(brokers.get("A"), 1);
        verifyPeerBrokerInfo(brokers.get("B"), 1);
    }

    public void testPeerBrokerCountFullPeerDuplex() throws Exception {
        createBroker("A");
        createBroker("B");
        NetworkConnector nc = bridgeBrokers("A", "B");
        nc.setDuplex(true);
        startAllBrokers();
        verifyPeerBrokerInfo(brokers.get("A"), 1);
        verifyPeerBrokerInfo(brokers.get("B"), 1);
    }


    private void verifyPeerBrokerInfo(BrokerItem brokerItem, final int max) {
        BrokerService broker = brokerItem.broker;
        RegionBroker regionBroker = (RegionBroker) broker.getRegionBroker();
        LOG.info("verify infos " + broker.getBrokerName() + ", len: " + regionBroker.getPeerBrokerInfos().length);
        for (BrokerInfo info : regionBroker.getPeerBrokerInfos()) {
            LOG.info(info.getBrokerName());
        }
        assertEquals(broker.getBrokerName(), max, regionBroker.getPeerBrokerInfos().length);
    }

    private void verifyPeerBrokerInfos(final int max) {
        Collection<BrokerItem> brokerList = brokers.values();
        for (Iterator<BrokerItem> i = brokerList.iterator(); i.hasNext();) {
            verifyPeerBrokerInfo(i.next(), max);
        }
    }

    @Override
    public void setUp() throws Exception {
        super.setAutoFail(true);
        super.setUp();
    }

    @Override
    public void tearDown() throws Exception {
        super.tearDown();
        ThreadTracker.result();
    }
}

Other ActiveMQ examples (source code examples)

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