001/**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017
018package org.apache.activemq.transport.ws.jetty8;
019
020import java.io.IOException;
021import javax.servlet.ServletException;
022import javax.servlet.http.HttpServletRequest;
023import javax.servlet.http.HttpServletResponse;
024
025import org.apache.activemq.transport.Transport;
026import org.apache.activemq.transport.TransportAcceptListener;
027import org.eclipse.jetty.websocket.WebSocket;
028import org.eclipse.jetty.websocket.WebSocketServlet;
029
030/**
031 * Handle connection upgrade requests and creates web sockets
032 */
033public class WSServlet extends WebSocketServlet {
034    private static final long serialVersionUID = -4716657876092884139L;
035
036    private TransportAcceptListener listener;
037
038    public void init() throws ServletException {
039        super.init();
040        listener = (TransportAcceptListener)getServletContext().getAttribute("acceptListener");
041        if (listener == null) {
042            throw new ServletException("No such attribute 'acceptListener' available in the ServletContext");
043        }
044    }
045
046    protected void doGet(HttpServletRequest request, HttpServletResponse response)
047        throws ServletException ,IOException  {
048        getServletContext().getNamedDispatcher("default").forward(request,response);
049    }
050
051    @Override
052    public WebSocket doWebSocketConnect(HttpServletRequest request, String protocol) {
053        WebSocket socket;
054        if (protocol != null && protocol.startsWith("mqtt")) {
055            socket = new MQTTSocket();
056        } else {
057            socket = new StompSocket();
058        }
059        listener.onAccept((Transport)socket);
060        return socket;
061    }
062}