1   /**
2    * Copyright (c) 2000-2008 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.kernel.cache.MultiVMPoolUtil;
26  import com.liferay.portal.kernel.cache.PortalCache;
27  import com.liferay.portal.kernel.servlet.ImageServletToken;
28  import com.liferay.portal.kernel.util.StringMaker;
29  import com.liferay.portal.kernel.util.StringPool;
30  import com.liferay.portal.servlet.filters.layoutcache.LayoutCacheUtil;
31  import com.liferay.portlet.journalcontent.util.JournalContentUtil;
32  
33  /**
34   * <a href="ImageServletTokenImpl.java.html"><b><i>View Source</i></b></a>
35   *
36   * @author Brian Wing Shun Chan
37   *
38   */
39  public class ImageServletTokenImpl implements ImageServletToken {
40  
41      public static final String CACHE_NAME = ImageServletToken.class.getName();
42  
43      public String getToken(long imageId) {
44          String key = _encodeKey(imageId);
45  
46          String token = (String)MultiVMPoolUtil.get(_cache, key);
47  
48          if (token == null) {
49              token = _createToken(imageId);
50  
51              MultiVMPoolUtil.put(_cache, key, token);
52          }
53  
54          return token;
55      }
56  
57      public void resetToken(long imageId) {
58          String key = _encodeKey(imageId);
59  
60          _cache.remove(key);
61  
62          // Journal content
63  
64          JournalContentUtil.clearCache();
65  
66          // Layout cache
67  
68          LayoutCacheUtil.clearCache();
69      }
70  
71      private String _createToken(long imageId) {
72          return String.valueOf(System.currentTimeMillis());
73      }
74  
75      private String _encodeKey(long imageId) {
76          StringMaker sm = new StringMaker();
77  
78          sm.append(CACHE_NAME);
79          sm.append(StringPool.POUND);
80          sm.append(imageId);
81  
82          return sm.toString();
83      }
84  
85      private static PortalCache _cache = MultiVMPoolUtil.getCache(CACHE_NAME);
86  
87  }