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ActiveMQ example source code file (NetworkAsyncStartTest.java)

This example ActiveMQ source code file (NetworkAsyncStartTest.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, b, brokera, brokerc, brokerservice, brokerservice, c, c, exception, exception, net, network, socketproxy, string, threading, threads, uri, uri

The ActiveMQ NetworkAsyncStartTest.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.concurrent.Executor;
import java.util.concurrent.Executors;
import org.apache.activemq.JmsMultipleBrokersTestSupport;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.network.DiscoveryNetworkConnector;
import org.apache.activemq.network.NetworkConnector;
import org.apache.activemq.util.SocketProxy;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

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

    private String brokerBUri = "tcp://localhost:61617";
    private String brokerCUri = "tcp://localhost:61618";
    int bridgeCount=0;

    public void testAsyncNetworkStartup() throws Exception {

        BrokerService brokerA = brokers.get("BrokerA").broker;
        bridgeBroker(brokerA, brokerBUri);
        bridgeBroker(brokerA, brokerCUri);

        LOG.info("starting A, no blocking on failed network connectors");
        brokerA.start();

        LOG.info("starting C transport connector");
        BrokerService brokerC = brokers.get("BrokerC").broker;
        brokerC.addConnector(brokerCUri);
        brokerC.start();

        assertTrue("got bridge to C", waitForBridgeFormation(brokerA, 1, 1));
        LOG.info("Got bridge A->C");

        LOG.info("starting B transport connector");
        BrokerService brokerB = brokers.get("BrokerB").broker;
        brokerB.addConnector(brokerBUri);
        brokerC.start();

        assertTrue("got bridge to B", waitForBridgeFormation(brokerA, 1, 0));
        assertTrue("got bridge to B&C", waitForBridgeFormation(brokerA, 1, 1));
    }

    public void testAsyncNetworkStartupWithSlowConnectionCreation() throws Exception {

        final BrokerService brokerA = brokers.get("BrokerA").broker;

        SocketProxy proxyToB = new SocketProxy();
        // don't accept any connections so limited to one connection with backlog
        proxyToB.setPauseAtStart(true);
        proxyToB.setAcceptBacklog(1);
        proxyToB.setTarget(new URI(brokerBUri));
        proxyToB.open();
        bridgeBroker(brokerA, proxyToB.getUrl().toString());
        bridgeBroker(brokerA, proxyToB.getUrl().toString());
        bridgeBroker(brokerA, proxyToB.getUrl().toString());
        bridgeBroker(brokerA, proxyToB.getUrl().toString());
        bridgeBroker(brokerA, proxyToB.getUrl().toString());
        bridgeBroker(brokerA, proxyToB.getUrl().toString());
        bridgeBroker(brokerA, proxyToB.getUrl().toString());
        bridgeBroker(brokerA, brokerCUri);

        Executor e = Executors.newCachedThreadPool();
        e.execute(new Runnable() {
            public void run() {
                LOG.info("starting A");
                try {
                    brokerA.setNetworkConnectorStartAsync(true);
                    brokerA.start();
                } catch (Exception e) {
                    LOG.error("start failed", e);
                }
            }
        });

        LOG.info("starting transport connector on C");
        BrokerService brokerC = brokers.get("BrokerC").broker;
        brokerC.addConnector(brokerCUri);
        brokerC.start();

        final long maxWaitMillis = 20*1000;
        assertTrue("got bridge to C in 10 seconds", waitForBridgeFormation(brokerA, 1, 7, maxWaitMillis));
    }

    private void bridgeBroker(BrokerService localBroker, String remoteURI) throws Exception {
        String uri = "static:(" + remoteURI + ")";
        NetworkConnector connector = new DiscoveryNetworkConnector(new URI(uri));
        connector.setName("bridge-" + bridgeCount++);
        localBroker.addNetworkConnector(connector);
    }

    @Override
    public void setUp() throws Exception {
        super.setAutoFail(true);
        super.setUp();
        // initially with no tcp transport connector
        createBroker(new URI("broker:()BrokerA?persistent=false&useJmx=false"));
        createBroker(new URI("broker:()BrokerB?persistent=false&useJmx=false"));
        createBroker(new URI("broker:()BrokerC?persistent=false&useJmx=false"));
    }
}

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