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.webcache;
24  
25  import com.liferay.portal.kernel.cache.PortalCache;
26  import com.liferay.portal.kernel.cache.SingleVMPoolUtil;
27  import com.liferay.portal.kernel.webcache.WebCacheException;
28  import com.liferay.portal.kernel.webcache.WebCacheItem;
29  import com.liferay.portal.kernel.webcache.WebCachePool;
30  import com.liferay.util.Time;
31  
32  import org.apache.commons.logging.Log;
33  import org.apache.commons.logging.LogFactory;
34  
35  /**
36   * <a href="WebCachePoolImpl.java.html"><b><i>View Source</i></b></a>
37   *
38   * @author Brian Wing Shun Chan
39   *
40   */
41  public class WebCachePoolImpl implements WebCachePool {
42  
43      public static final String CACHE_NAME = WebCachePool.class.getName();
44  
45      public void clear() {
46          _cache.removeAll();
47      }
48  
49      public Object get(String key, WebCacheItem wci) {
50          Object obj = SingleVMPoolUtil.get(_cache, key);
51  
52          if (obj == null) {
53              try {
54                  obj = wci.convert(key);
55  
56                  int timeToLive = (int)(wci.getRefreshTime() / Time.SECOND);
57  
58                  _cache.put(key, obj, timeToLive);
59              }
60              catch (WebCacheException wce) {
61                  Throwable cause = wce.getCause();
62  
63                  if (cause != null) {
64                      _log.error(cause, cause);
65                  }
66                  else {
67                      _log.error(wce, wce);
68                  }
69              }
70          }
71  
72          return obj;
73      }
74  
75      public void remove(String key) {
76          SingleVMPoolUtil.remove(_cache, key);
77      }
78  
79      private WebCachePoolImpl() {
80          _cache = SingleVMPoolUtil.getCache(CACHE_NAME);
81      }
82  
83      private static Log _log = LogFactory.getLog(WebCachePoolImpl.class);
84  
85      private PortalCache _cache;
86  
87  }