| DoubleClickFilter.java |
1 /**
2 * Copyright (c) 2000-2009 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.servlet.filters.doubleclick;
24
25 import com.liferay.portal.kernel.log.Log;
26 import com.liferay.portal.kernel.log.LogFactoryUtil;
27 import com.liferay.portal.kernel.util.HttpUtil;
28 import com.liferay.portal.servlet.filters.BasePortalFilter;
29
30 import java.io.IOException;
31
32 import javax.servlet.FilterChain;
33 import javax.servlet.ServletException;
34 import javax.servlet.http.HttpServletRequest;
35 import javax.servlet.http.HttpServletResponse;
36 import javax.servlet.http.HttpSession;
37
38 import org.apache.commons.lang.time.StopWatch;
39
40 /**
41 * <a href="DoubleClickFilter.java.html"><b><i>View Source</i></b></a>
42 *
43 * @author Olaf Fricke
44 * @author Brian Wing Shun Chan
45 * @author Raymond Augé
46 *
47 */
48 public class DoubleClickFilter extends BasePortalFilter {
49
50 protected void processFilter(
51 HttpServletRequest request, HttpServletResponse response,
52 FilterChain filterChain)
53 throws IOException, ServletException {
54
55 StopWatch stopWatch = null;
56
57 if (_log.isDebugEnabled()) {
58 stopWatch = new StopWatch();
59
60 stopWatch.start();
61 }
62
63 HttpSession session = request.getSession(false);
64
65 if (session == null) {
66 processFilter(
67 DoubleClickFilter.class, request, response, filterChain);
68 }
69 else {
70 DoubleClickController controller = null;
71
72 synchronized (session) {
73 controller = (DoubleClickController)session.getAttribute(
74 _CONTROLLER_KEY);
75
76 if (controller == null) {
77 controller = new DoubleClickController();
78
79 session.setAttribute(_CONTROLLER_KEY, controller);
80 }
81 }
82
83 boolean ok = false;
84
85 try {
86 controller.control(request, response, filterChain);
87
88 ok = true;
89 }
90 finally {
91 if (_log.isDebugEnabled()) {
92 String completeURL = HttpUtil.getCompleteURL(request);
93
94 if (ok) {
95 _log.debug(
96 "Double click prevention succeded in " +
97 stopWatch.getTime() + " ms for " + completeURL);
98 }
99 else {
100 _log.debug(
101 "Double click prevention failed in " +
102 stopWatch.getTime() + " ms for " + completeURL);
103 }
104 }
105 }
106 }
107 }
108
109 private static final String _CONTROLLER_KEY =
110 DoubleClickFilter.class.getName();
111
112 private static Log _log = LogFactoryUtil.getLog(DoubleClickFilter.class);
113
114 }