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     * <p>This service is responsible for for storing the http/web request wrappers into 
038     *  {@link RequestGlobals}.</p>
039     * 
040     * @author Howard M. Lewis Ship
041     * @since 4.0
042     */
043    public class WebRequestServicerPipelineBridge implements ServletRequestServicer
044    {
045        private RequestGlobals _requestGlobals;
046    
047        private WebRequestServicer _webRequestServicer;
048    
049        public void service(HttpServletRequest request, HttpServletResponse response)
050                throws IOException, ServletException
051        {
052            _requestGlobals.store(request, response);
053            
054            WebRequest webRequest = new ServletWebRequest(request, response);
055            WebResponse webResponse = new ServletWebResponse(response);
056            
057            _requestGlobals.store(webRequest, webResponse);
058            
059            try
060            {
061                _webRequestServicer.service(webRequest, webResponse);
062            }
063            catch (RuntimeException ex)
064            {
065                throw new ServletException(ex);
066            }
067        }
068    
069        public void setRequestGlobals(RequestGlobals requestGlobals)
070        {
071            _requestGlobals = requestGlobals;
072        }
073    
074        public void setWebRequestServicer(WebRequestServicer webRequestServicer)
075        {
076            _webRequestServicer = webRequestServicer;
077        }
078    }