Cache


1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    *  contributor license agreements.  The ASF licenses this file to You
4    * under the Apache License, Version 2.0 (the "License"); you may not
5    * 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.  For additional information regarding
15   * copyright in this work, please see the NOTICE file in the top level
16   * directory of this distribution.
17   */
18  
19  package org.apache.roller.util.cache;
20  
21  import java.util.Map  ;
22  import java.util.Set  ;
23  
24  
25  /**
26   * Base interface representing a cache in Roller.
27   */
28  public interface Cache {
29      
30      /**
31       * a unique identifier for the cache.
32       */
33      public String   getId();
34      
35      
36      /**
37       * put an item in the cache.
38       */
39      public void put(String   key, Object   value);
40      
41      
42      /**
43       * get an item from the cache.
44       */
45      public Object   get(String   key);
46      
47      
48      /**
49       * remove an item from the cache.
50       */
51      public void remove(String   key);
52      
53      
54      /**
55       * clear the entire cache.
56       */
57      public void clear();
58      
59      
60      /**
61       * get cache stats.
62       */
63      public Map   getStats();
64      
65  }
66
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