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