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.servlet;
24  
25  import com.liferay.portal.cms.servlet.CMSServletUtil;
26  import com.liferay.portal.kernel.cache.MultiVMPoolUtil;
27  import com.liferay.portal.kernel.cache.PortalCache;
28  import com.liferay.portal.kernel.servlet.ImageServletToken;
29  import com.liferay.portal.kernel.util.StringMaker;
30  import com.liferay.portal.kernel.util.StringPool;
31  import com.liferay.portal.servlet.filters.layoutcache.LayoutCacheUtil;
32  import com.liferay.portlet.journalcontent.util.JournalContentUtil;
33  
34  /**
35   * <a href="ImageServletTokenImpl.java.html"><b><i>View Source</i></b></a>
36   *
37   * @author Brian Wing Shun Chan
38   *
39   */
40  public class ImageServletTokenImpl implements ImageServletToken {
41  
42      public static final String CACHE_NAME = ImageServletToken.class.getName();
43  
44      public String getToken(long imageId) {
45          String key = _encodeKey(imageId);
46  
47          String token = (String)MultiVMPoolUtil.get(_cache, key);
48  
49          if (token == null) {
50              token = _createToken(imageId);
51  
52              MultiVMPoolUtil.put(_cache, key, token);
53          }
54  
55          return token;
56      }
57  
58      public void resetToken(long imageId) {
59          String key = _encodeKey(imageId);
60  
61          _cache.remove(key);
62  
63          // CMS
64  
65          CMSServletUtil.clearCache();
66  
67          // Journal content
68  
69          JournalContentUtil.clearCache();
70  
71          // Layout cache
72  
73          LayoutCacheUtil.clearCache();
74      }
75  
76      private String _createToken(long imageId) {
77          return String.valueOf(System.currentTimeMillis());
78      }
79  
80      private String _encodeKey(long imageId) {
81          StringMaker sm = new StringMaker();
82  
83          sm.append(CACHE_NAME);
84          sm.append(StringPool.POUND);
85          sm.append(imageId);
86  
87          return sm.toString();
88      }
89  
90      private static PortalCache _cache = MultiVMPoolUtil.getCache(CACHE_NAME);
91  
92  }