| AJAXAction.java |
1 /**
2 * Copyright (c) 2000-2007 Liferay, Inc. All rights reserved.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a copy
5 * of this software and associated documentation files (the "Software"), to deal
6 * in the Software without restriction, including without limitation the rights
7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8 * copies of the Software, and to permit persons to whom the Software is
9 * furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20 * SOFTWARE.
21 */
22
23 package com.liferay.portal.struts;
24
25 import com.liferay.portal.kernel.servlet.HttpHeaders;
26 import com.liferay.portal.kernel.util.ContentTypes;
27
28 import java.io.PrintWriter;
29
30 import javax.servlet.http.HttpServletRequest;
31 import javax.servlet.http.HttpServletResponse;
32
33 import org.apache.struts.action.Action;
34 import org.apache.struts.action.ActionForm;
35 import org.apache.struts.action.ActionForward;
36 import org.apache.struts.action.ActionMapping;
37
38 /**
39 * <a href="AJAXAction.java.html"><b><i>View Source</i></b></a>
40 *
41 * @author Brian Wing Shun Chan
42 *
43 */
44 public abstract class AJAXAction extends Action {
45
46 public ActionForward execute(
47 ActionMapping mapping, ActionForm form, HttpServletRequest req,
48 HttpServletResponse res)
49 throws Exception {
50
51 String xml = null;
52
53 try {
54 xml = getXML(mapping, form, req, res);
55 }
56 catch (Exception e) {
57 res.sendError(
58 HttpServletResponse.SC_INTERNAL_SERVER_ERROR, e.getMessage());
59
60 return null;
61 }
62
63 res.setContentType(ContentTypes.TEXT_XML_UTF8);
64 res.setHeader(HttpHeaders.CACHE_CONTROL, "no-cache");
65
66 PrintWriter pw = res.getWriter();
67
68 pw.write(xml);
69
70 pw.close();
71
72 return null;
73 }
74
75 public abstract String getXML(
76 ActionMapping mapping, ActionForm form, HttpServletRequest req,
77 HttpServletResponse res)
78 throws Exception;
79
80 }