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ActiveMQ example source code file (HttpEmbeddedTunnelServlet.java)

This example ActiveMQ source code file (HttpEmbeddedTunnelServlet.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, brokerservice, exception, httpembeddedtunnelservlet, httptransportfactory, httptransportfactory, httptransportserver, httptunnelservlet, listening, net, network, servlet, servletexception, servletexception, string, string, uri

The ActiveMQ HttpEmbeddedTunnelServlet.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.http;

import java.net.URI;

import javax.servlet.ServletException;

import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.transport.TransportAcceptListener;

/**
 * This servlet embeds an ActiveMQ broker inside a servlet engine which is ideal
 * for deploying ActiveMQ inside a WAR and using this servlet as a HTTP tunnel.
 * 
 * 
 */
public class HttpEmbeddedTunnelServlet extends HttpTunnelServlet {
    private static final long serialVersionUID = -3705734740251302361L;

    protected BrokerService broker;
    protected HttpTransportServer transportConnector;

    public synchronized void init() throws ServletException {
        // lets initialize the ActiveMQ broker
        try {
            if (broker == null) {
                broker = createBroker();

                // Add the servlet connector
                String url = getConnectorURL();
                HttpTransportFactory factory = new HttpTransportFactory();
                transportConnector = (HttpTransportServer) factory.doBind(new URI(url));
                broker.addConnector(transportConnector);

                String brokerURL = getServletContext().getInitParameter("org.apache.activemq.brokerURL");
                if (brokerURL != null) {
                    log("Listening for internal communication on: " + brokerURL);
                }
            }
            broker.start();
        } catch (Exception e) {
            throw new ServletException("Failed to start embedded broker: " + e, e);
        }
        // now lets register the listener
        TransportAcceptListener listener = transportConnector.getAcceptListener();
        getServletContext().setAttribute("transportChannelListener", listener);
        super.init();
    }

    /**
     * Factory method to create a new broker
     * 
     * @throws Exception
     */
    protected BrokerService createBroker() throws Exception {
        BrokerService answer = new BrokerService();
        return answer;
    }

    protected String getConnectorURL() {
        return "http://localhost/" + getServletContext().getServletContextName();
    }
}

Other ActiveMQ examples (source code examples)

Here is a short list of links related to this ActiveMQ HttpEmbeddedTunnelServlet.java source code file:

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