001    // Copyright 2005 The Apache Software Foundation
002    //
003    // Licensed under the Apache License, Version 2.0 (the "License");
004    // you may not use this file except in compliance with the License.
005    // You may obtain a copy of the License at
006    //
007    //     http://www.apache.org/licenses/LICENSE-2.0
008    //
009    // Unless required by applicable law or agreed to in writing, software
010    // distributed under the License is distributed on an "AS IS" BASIS,
011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012    // See the License for the specific language governing permissions and
013    // limitations under the License.
014    
015    package org.apache.tapestry.services.impl;
016    
017    import java.io.IOException;
018    
019    import javax.servlet.ServletException;
020    import javax.servlet.http.HttpServletRequest;
021    import javax.servlet.http.HttpServletResponse;
022    
023    import org.apache.tapestry.services.RequestGlobals;
024    import org.apache.tapestry.services.ServletRequestServicer;
025    import org.apache.tapestry.services.WebRequestServicer;
026    import org.apache.tapestry.web.ServletWebRequest;
027    import org.apache.tapestry.web.ServletWebResponse;
028    import org.apache.tapestry.web.WebRequest;
029    import org.apache.tapestry.web.WebResponse;
030    
031    /**
032     * Bridges from the <code>tapestry.request.ServletRequestServicerPipeline</code> to the
033     * <code>tapestry.request.WebRequestServicerPipeline</code>. Also, stores the web request and
034     * web response into {@link org.apache.tapestry.services.RequestGlobals}. Intercepts runtime
035     * exceptions and throws them wrapped as {@link javax.servlet.ServletException}.
036     * 
037     * @author Howard M. Lewis Ship
038     * @since 4.0
039     */
040    public class WebRequestServicerPipelineBridge implements ServletRequestServicer
041    {
042        private RequestGlobals _requestGlobals;
043    
044        private WebRequestServicer _webRequestServicer;
045    
046        public void service(HttpServletRequest request, HttpServletResponse response)
047                throws IOException, ServletException
048        {
049            _requestGlobals.store(request, response);
050    
051            WebRequest webRequest = new ServletWebRequest(request, response);
052            WebResponse webResponse = new ServletWebResponse(response);
053    
054            try
055            {
056                _webRequestServicer.service(webRequest, webResponse);
057            }
058            catch (RuntimeException ex)
059            {
060                throw new ServletException(ex);
061            }
062        }
063    
064        public void setRequestGlobals(RequestGlobals requestGlobals)
065        {
066            _requestGlobals = requestGlobals;
067        }
068    
069        public void setWebRequestServicer(WebRequestServicer webRequestServicer)
070        {
071            _webRequestServicer = webRequestServicer;
072        }
073    }