1 /**
2 * This file Copyright (c) 2008-2010 Magnolia International
3 * Ltd. (http://www.magnolia-cms.com). All rights reserved.
4 *
5 *
6 * This file is dual-licensed under both the Magnolia
7 * Network Agreement and the GNU General Public License.
8 * You may elect to use one or the other of these licenses.
9 *
10 * This file is distributed in the hope that it will be
11 * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
12 * implied warranty of MERCHANTABILITY or FITNESS FOR A
13 * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
14 * Redistribution, except as permitted by whichever of the GPL
15 * or MNA you select, is prohibited.
16 *
17 * 1. For the GPL license (GPL), you can redistribute and/or
18 * modify this file under the terms of the GNU General
19 * Public License, Version 3, as published by the Free Software
20 * Foundation. You should have received a copy of the GNU
21 * General Public License, Version 3 along with this program;
22 * if not, write to the Free Software Foundation, Inc., 51
23 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
24 *
25 * 2. For the Magnolia Network Agreement (MNA), this file
26 * and the accompanying materials are made available under the
27 * terms of the MNA which accompanies this distribution, and
28 * is available at http://www.magnolia-cms.com/mna.html
29 *
30 * Any modifications to this file must keep this entire header
31 * intact.
32 *
33 */
34 package info.magnolia.module.rssaggregator.servlet;
35
36 import javax.servlet.ServletException;
37 import javax.servlet.http.HttpServlet;
38 import javax.servlet.http.HttpServletRequest;
39 import javax.servlet.http.HttpServletResponse;
40 import java.io.IOException;
41
42 /**
43 * Convenience base servlet for simple request handling. As such provides a {@link #handleRequest(HttpServletRequest,
44 * HttpServletResponse) main entry point} for handling POST and GET requests.
45 *
46 * @author Rob van der Linden Vooren
47 * @deprecated since 1.0 use MVCServlet instead
48 */
49 public abstract class AbstractServlet extends HttpServlet {
50
51 /**
52 * Delegate POST requests to {@link #processRequest}.
53 *
54 * @see #handleRequest
55 */
56 @Override
57 protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
58 processRequest(request, response);
59 }
60
61 /**
62 * Delegate GET requests to {@link #processRequest}.
63 *
64 * @see #handleRequest
65 */
66 @Override
67 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
68 processRequest(request, response);
69 }
70
71 /**
72 * Delegates to template method {@link #handleRequest(HttpServletRequest, HttpServletResponse) handleRequest} which
73 * handles actual handling of the request. Additionaly wraps exceptions other than IOException and ServletException
74 * in a ServletException.
75 *
76 * @param request the request to handle
77 * @param response the associated response
78 * @throws IOException if an input or output error is detected when the servlet handles the request
79 * @throws ServletException if the request could not be handled
80 */
81 protected void processRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
82 try {
83 handleRequest(request, response);
84 } catch (ServletException se) {
85 throw se;
86 } catch (IOException ioe) {
87 throw ioe;
88 } catch (Throwable t) {
89 throw new ServletException("Failed to process request", t);
90 }
91 }
92
93 /**
94 * Subclass need implement this method in order to handle the request.
95 *
96 * @param request the request to handle
97 * @param response the associated response
98 * @throws Exception if an exception occurs during request handling
99 */
100 public abstract void handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception;
101
102 }