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ActiveMQ example source code file (ProxyConnector.java)

This example ActiveMQ source code file (ProxyConnector.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

connector, connector, copyonwritearraylist, exception, exception, io, ioexception, net, network, proxyconnection, stopping, threading, threads, transport, transport, transportserver, uri, uri, urisyntaxexception, util

The ActiveMQ ProxyConnector.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.proxy;

import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.Iterator;
import java.util.concurrent.CopyOnWriteArrayList;
import org.apache.activemq.Service;
import org.apache.activemq.transport.CompositeTransport;
import org.apache.activemq.transport.Transport;
import org.apache.activemq.transport.TransportAcceptListener;
import org.apache.activemq.transport.TransportFactory;
import org.apache.activemq.transport.TransportFilter;
import org.apache.activemq.transport.TransportServer;
import org.apache.activemq.util.ServiceStopper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @org.apache.xbean.XBean
 * 
 * 
 */
public class ProxyConnector implements Service {

    private static final Logger LOG = LoggerFactory.getLogger(ProxyConnector.class);
    private TransportServer server;
    private URI bind;
    private URI remote;
    private URI localUri;
    private String name;
    /**
     * Should we proxy commands to the local broker using VM transport as well?
     */
    private boolean proxyToLocalBroker = true;
    
    private final CopyOnWriteArrayList<ProxyConnection> connections = new CopyOnWriteArrayList();

    public void start() throws Exception {

        this.getServer().setAcceptListener(new TransportAcceptListener() {
            public void onAccept(Transport localTransport) {
                try {
                    Transport remoteTransport = createRemoteTransport();
                    ProxyConnection connection = new ProxyConnection(localTransport, remoteTransport);
                    connections.add(connection);
                    connection.start();
                } catch (Exception e) {
                    onAcceptError(e);
                }
            }

            public void onAcceptError(Exception error) {
                LOG.error("Could not accept connection: " + error, error);
            }
        });
        getServer().start();
        LOG.info("Proxy Connector " + getName() + " Started");

    }

    public void stop() throws Exception {
        ServiceStopper ss = new ServiceStopper();
        if (this.server != null) {
            ss.stop(this.server);
        }
        for (Iterator<ProxyConnection> iter = connections.iterator(); iter.hasNext();) {
            LOG.info("Connector stopped: Stopping proxy.");
            ss.stop(iter.next());
        }
        ss.throwFirstException();
        LOG.info("Proxy Connector " + getName() + " Stopped");
    }

    // Properties
    // -------------------------------------------------------------------------

    public URI getLocalUri() {
        return localUri;
    }

    public void setLocalUri(URI localURI) {
        this.localUri = localURI;
    }

    public URI getBind() {
        return bind;
    }

    public void setBind(URI bind) {
        this.bind = bind;
    }

    public URI getRemote() {
        return remote;
    }

    public void setRemote(URI remote) {
        this.remote = remote;
    }

    public TransportServer getServer() throws IOException, URISyntaxException {
        if (server == null) {
            server = createServer();
        }
        return server;
    }

    public void setServer(TransportServer server) {
        this.server = server;
    }

    protected TransportServer createServer() throws IOException, URISyntaxException {
        if (bind == null) {
            throw new IllegalArgumentException("You must specify either a server or the bind property");
        }
        return TransportFactory.bind(bind);
    }

    private Transport createRemoteTransport() throws Exception {
        Transport transport = TransportFactory.compositeConnect(remote);
        CompositeTransport ct = transport.narrow(CompositeTransport.class);
        if (ct != null && localUri != null && proxyToLocalBroker) {
            ct.add(false,new URI[] {localUri});
        }

        // Add a transport filter so that we can track the transport life cycle
        transport = new TransportFilter(transport) {
            @Override
            public void stop() throws Exception {
                LOG.info("Stopping proxy.");
                super.stop();
                connections.remove(this);
            }
        };
        return transport;
    }

    public String getName() {
        if (name == null) {
            if (server != null) {
                name = server.getConnectURI().toString();
            } else {
                name = "proxy";
            }
        }
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public boolean isProxyToLocalBroker() {
        return proxyToLocalBroker;
    }

    public void setProxyToLocalBroker(boolean proxyToLocalBroker) {
        this.proxyToLocalBroker = proxyToLocalBroker;
    }

}

Other ActiveMQ examples (source code examples)

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