StrongCacheStorage


1   /*
2    * Copyright (c) 2003 The Visigoth Software Society. All rights
3    * reserved.
4    *
5    * Redistribution and use in source and binary forms, with or without
6    * modification, are permitted provided that the following conditions
7    * are met:
8    *
9    * 1. Redistributions of source code must retain the above copyright
10   *    notice, this list of conditions and the following disclaimer.
11   *
12   * 2. Redistributions in binary form must reproduce the above copyright
13   *    notice, this list of conditions and the following disclaimer in
14   *    the documentation and/or other materials provided with the
15   *    distribution.
16   *
17   * 3. The end-user documentation included with the redistribution, if
18   *    any, must include the following acknowledgement:
19   *       "This product includes software developed by the
20   *        Visigoth Software Society (http://www.visigoths.org/)."
21   *    Alternately, this acknowledgement may appear in the software itself,
22   *    if and wherever such third-party acknowledgements normally appear.
23   *
24   * 4. Neither the name "FreeMarker", "Visigoth", nor any of the names of the
25   *    project contributors may be used to endorse or promote products derived
26   *    from this software without prior written permission. For written
27   *    permission, please contact visigoths@visigoths.org.
28   *
29   * 5. Products derived from this software may not be called "FreeMarker" or "Visigoth"
30   *    nor may "FreeMarker" or "Visigoth" appear in their names
31   *    without prior written permission of the Visigoth Software Society.
32   *
33   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
34   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
35   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
36   * DISCLAIMED.  IN NO EVENT SHALL THE VISIGOTH SOFTWARE SOCIETY OR
37   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
38   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
39   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
40   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
41   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
42   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
43   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
44   * SUCH DAMAGE.
45   * ====================================================================
46   *
47   * This software consists of voluntary contributions made by many
48   * individuals on behalf of the Visigoth Software Society. For more
49   * information on the Visigoth Software Society, please see
50   * http://www.visigoths.org/
51   */
52  
53  package freemarker.cache;
54  
55  import java.util.HashMap  ;
56  import java.util.Map  ;
57  
58  /**
59   * Strong cache storage is a cache storage that simply wraps a {@link HashMap}.
60   * It holds a strong reference to all objects it was passed, therefore prevents
61   * the cache from being purged during garbage collection.
62   * This class is <em>NOT</em> thread-safe. If it is accessed from multiple
63   * threads concurrently, proper synchronization must be provided by the callers.
64   * Note that {@link TemplateCache}, the natural user of this class provides the
65   * necessary synchronizations when it uses the class.
66   * @author Attila Szegedi
67   * @version $Id: StrongCacheStorage.java,v 1.3 2003/09/22 20:47:03 ddekany Exp $
68   *
69   * @deprecated use {@link MruCacheStorage} instead.
70   */
71  public class StrongCacheStorage implements CacheStorage
72  {
73      private final Map   map = new HashMap  ();
74      
75      public Object   get(Object   key)
76      {
77          return map.get(key);
78      }
79  
80      public void put(Object   key, Object   value)
81      {
82          map.put(key, value);
83      }
84  
85      public void remove(Object   key)
86      {
87          map.remove(key);
88      }
89      
90      public void clear()
91      {
92          map.clear();
93      }
94  }
95
A to Z: JavaDoc & Examples Daily Java News & Articles Open Source Projects Open Source Codes Free Computer Books Remove Frame
Popular Tags