/**
* 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.
*
* @version $Revision$
*/
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();
transportConnector = new HttpTransportServer(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();
}
}