/**
*
* Copyright 2004 Protique Ltd
*
* Licensed 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.activemq.transport.http;
import org.activemq.broker.BrokerContainer;
import org.activemq.broker.impl.BrokerContainerImpl;
import org.activemq.transport.TransportChannelListener;
import org.activemq.transport.TransportServerChannelSupport;
import javax.jms.JMSException;
import javax.servlet.ServletException;
/**
* 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.
*
* @version $Revision$
*/
public class HttpEmbeddedTunnelServlet extends HttpTunnelServlet {
private BrokerContainer broker;
private ServletConnector transportConnector;
public synchronized void init() throws ServletException {
// lets initialize the ActiveMQ broker
if (broker == null) {
broker = createBroker();
}
try {
broker.start();
}
catch (JMSException e) {
throw new ServletException("Failed to start embedded broker: " + e, e);
}
// now lets register the listener
TransportChannelListener listener = transportConnector.getTransportChannelListener();
getServletContext().setAttribute("transportChannelListener", listener);
super.init();
}
protected static class ServletConnector extends TransportServerChannelSupport {
public ServletConnector(String url) {
super(url);
}
}
/**
* Factory method to create a new broker
*/
protected BrokerContainer createBroker() {
BrokerContainer answer = new BrokerContainerImpl();
String url = getConnectorURL();
transportConnector = new ServletConnector(url);
answer.addConnector(transportConnector);
String brokerURL = getServletContext().getInitParameter("org.activemq.brokerURL");
if (brokerURL != null) {
log("Listening for internal communication on: " + brokerURL);
}
return answer;
}
protected String getConnectorURL() {
return "http://localhost/" + getServletContext().getServletContextName();
}
}