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1   /*
2    * Copyright 2000-2001,2004 The Apache Software Foundation.
3    * 
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    * 
8    *      http://www.apache.org/licenses/LICENSE-2.0
9    * 
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  
17  package org.apache.jetspeed.services.portletcache;
18  
19  import java.io.IOException;
20  
21  import org.apache.turbine.services.TurbineServices;
22  import org.apache.turbine.services.cache.GlobalCacheService;
23  import org.apache.turbine.services.cache.CachedObject;
24  import org.apache.turbine.services.cache.ObjectExpiredException;
25  
26  
27  /***
28   * This class is a static wrapper around the Turbine GlobalCacheService
29   * which doesn't provide its own wrapper.
30   * 
31   * @see org.apache.turbine.services.cache.GlobalCacheService
32   * @author <a href="mailto:raphael@apache.org">RaphaŽl Luta</a>
33   * @version $Id: GlobalCache.java,v 1.7 2004/02/23 03:34:54 jford Exp $
34   */
35  public class GlobalCache {
36          
37      /***
38       * Add an object to the cache
39       *
40       * @param id key of the object used by the cache to store and retrieve
41       * it. Must not be null.
42       * @param o the object to cache
43       */
44      public static void addObject( String id, CachedObject o ) {
45  
46          GlobalCacheService gcs = (GlobalCacheService)TurbineServices
47              .getInstance()
48              .getService( GlobalCacheService.SERVICE_NAME );
49              
50          gcs.addObject( id, o );
51      }
52      
53      /***
54       * Gets a cached object given its id (a String).
55       *
56       * @param id The String id for the object.
57       * @return A CachedObject.
58       * @exception ObjectExpiredException The object has expired in
59       * the cache.
60       */
61      public static CachedObject getObject(String id)
62          throws ObjectExpiredException {
63  
64          GlobalCacheService gcs = (GlobalCacheService)TurbineServices
65              .getInstance()
66              .getService( GlobalCacheService.SERVICE_NAME );
67              
68          return gcs.getObject( id );
69      }
70      
71      /***
72       * Gets size, in bytes, of cache
73       *
74       * @return int Size, in byte, of cache
75       * @exception IOException Exception passed from
76       */
77      public static int getCacheSize()
78      throws IOException {
79          GlobalCacheService gcs = (GlobalCacheService)TurbineServices
80              .getInstance()
81              .getService( GlobalCacheService.SERVICE_NAME );
82          
83          return gcs.getCacheSize();
84      }
85      
86      /***
87       * Gets size, in bytes, of cache
88       *
89       * @return int, Size, in byte, of cache
90       */
91      public static int getNumberOfObjects() {
92          int tempInt = 0;
93          GlobalCacheService gcs = (GlobalCacheService)TurbineServices
94              .getInstance()
95              .getService( GlobalCacheService.SERVICE_NAME );
96          
97          tempInt = gcs.getNumberOfObjects();
98          return tempInt;
99      }
100     
101     /***
102      * Flush the cache of <B>ALL</B> objects
103      */
104     public void flushCache() {
105         GlobalCacheService gcs = (GlobalCacheService)TurbineServices
106             .getInstance()
107             .getService( GlobalCacheService.SERVICE_NAME );
108         
109         gcs.flushCache();
110     }
111 }