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1   package org.apache.jcs.engine;
2   
3   /*
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   *   http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing,
15   * software distributed under the License is distributed on an
16   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17   * KIND, either express or implied.  See the License for the
18   * specific language governing permissions and limitations
19   * under the License.
20   */
21  
22  import java.io.Serializable;
23  
24  import org.apache.commons.logging.Log;
25  import org.apache.commons.logging.LogFactory;
26  import org.apache.jcs.engine.behavior.ICacheElement;
27  import org.apache.jcs.engine.behavior.ICacheService;
28  
29  import org.apache.jcs.engine.behavior.IZombie;
30  
31  /***
32   * Zombie adapter for any cache service. balks at every call.
33   */
34  public class ZombieCacheService
35      implements ICacheService, IZombie
36  {
37  
38      private static final Log log = LogFactory.getLog( ZombieCacheService.class );
39  
40      /***
41       * @param item
42       */
43      public void put( ICacheElement item )
44      {
45          if ( log.isDebugEnabled() )
46          {
47              log.debug( "Zombie put for item " + item );
48          }
49          // zombies have no inner life
50      }
51  
52      /*
53       * (non-Javadoc)
54       * @see org.apache.jcs.engine.behavior.ICacheService#update(org.apache.jcs.engine.behavior.ICacheElement)
55       */
56      public void update( ICacheElement item )
57      {
58          // zombies have no inner life
59      }
60  
61      /*
62       * (non-Javadoc)
63       * @see org.apache.jcs.engine.behavior.ICacheService#get(java.lang.String,
64       *      java.io.Serializable)
65       */
66      public ICacheElement get( String cacheName, Serializable key )
67      {
68          return null;
69      }
70  
71      /***
72       * Logs the get to debug, but always balks.
73       * <p>
74       * @param cacheName
75       * @param key
76       * @param container
77       * @return null always
78       */
79      public Serializable get( String cacheName, Serializable key, boolean container )
80      {
81          if ( log.isDebugEnabled() )
82          {
83              log.debug( "Zombie get for key [" + key + "] cacheName [" + cacheName + "] container [" + container + "]" );
84          }
85          // zombies have no inner life
86          return null;
87      }
88  
89      /*
90       * (non-Javadoc)
91       * @see org.apache.jcs.engine.behavior.ICacheService#remove(java.lang.String,
92       *      java.io.Serializable)
93       */
94      public void remove( String cacheName, Serializable key )
95      {
96          // zombies have no inner life
97      }
98  
99      /*
100      * (non-Javadoc)
101      * @see org.apache.jcs.engine.behavior.ICacheService#removeAll(java.lang.String)
102      */
103     public void removeAll( String cacheName )
104     {
105         // zombies have no inner life
106     }
107 
108     /*
109      * (non-Javadoc)
110      * @see org.apache.jcs.engine.behavior.ICacheService#dispose(java.lang.String)
111      */
112     public void dispose( String cacheName )
113     {
114         // zombies have no inner life
115         return;
116     }
117 
118     /*
119      * (non-Javadoc)
120      * @see org.apache.jcs.engine.behavior.ICacheService#release()
121      */
122     public void release()
123     {
124         // zombies have no inner life
125         return;
126     }
127 
128 }