01: /**
02: * Copyright (c) 2000-2008 Liferay, Inc. All rights reserved.
03: *
04: * Permission is hereby granted, free of charge, to any person obtaining a copy
05: * of this software and associated documentation files (the "Software"), to deal
06: * in the Software without restriction, including without limitation the rights
07: * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
08: * copies of the Software, and to permit persons to whom the Software is
09: * 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: */package com.liferay.portal.struts;
22:
23: import com.liferay.portal.kernel.servlet.HttpHeaders;
24: import com.liferay.portal.kernel.util.ContentTypes;
25: import com.liferay.portal.util.PortalUtil;
26:
27: import java.io.PrintWriter;
28:
29: import javax.servlet.http.HttpServletRequest;
30: import javax.servlet.http.HttpServletResponse;
31:
32: import org.apache.struts.action.Action;
33: import org.apache.struts.action.ActionForm;
34: import org.apache.struts.action.ActionForward;
35: import org.apache.struts.action.ActionMapping;
36:
37: /**
38: * <a href="AJAXAction.java.html"><b><i>View Source</i></b></a>
39: *
40: * @author Brian Wing Shun Chan
41: *
42: */
43: public abstract class AJAXAction extends Action {
44:
45: public ActionForward execute(ActionMapping mapping,
46: ActionForm form, HttpServletRequest req,
47: HttpServletResponse res) throws Exception {
48:
49: String xml = null;
50:
51: try {
52: xml = getXML(mapping, form, req, res);
53: } catch (Exception e) {
54: PortalUtil.sendError(
55: HttpServletResponse.SC_INTERNAL_SERVER_ERROR, e,
56: req, res);
57:
58: return null;
59: }
60:
61: res.setContentType(ContentTypes.TEXT_XML_UTF8);
62: res.setHeader(HttpHeaders.CACHE_CONTROL, "no-cache");
63:
64: PrintWriter pw = res.getWriter();
65:
66: pw.write(xml);
67:
68: pw.close();
69:
70: return null;
71: }
72:
73: public abstract String getXML(ActionMapping mapping,
74: ActionForm form, HttpServletRequest req,
75: HttpServletResponse res) throws Exception;
76:
77: }
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