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1   package org.apache.jcs.auxiliary.lateral;
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  import java.util.Collections;
24  import java.util.Set;
25  
26  import org.apache.jcs.auxiliary.lateral.behavior.ILateralCacheService;
27  import org.apache.jcs.engine.ZombieCacheService;
28  import org.apache.jcs.engine.behavior.ICacheElement;
29  
30  /***
31   * The ZombieLateralCacheService is used as a facade when the lateral is not
32   * available. It balks when the lateral is in error. When lateral service is
33   * restored, this is replaced by a live facade.
34   *
35   */
36  public class ZombieLateralCacheService
37      extends ZombieCacheService
38      implements ILateralCacheService
39  {
40  
41      /*
42       * (non-Javadoc)
43       *
44       * @see org.apache.jcs.auxiliary.lateral.behavior.ILateralCacheService#update(org.apache.jcs.engine.behavior.ICacheElement,
45       *      long)
46       */
47      public void update( ICacheElement item, long listenerId )
48      {
49          // zombies have no inner life
50      }
51  
52      /*
53       * (non-Javadoc)
54       *
55       * @see org.apache.jcs.auxiliary.lateral.behavior.ILateralCacheService#remove(java.lang.String,
56       *      java.io.Serializable, long)
57       */
58      public void remove( String cacheName, Serializable key, long listenerId )
59      {
60          // zombies have no inner life
61      }
62  
63      /*
64       * (non-Javadoc)
65       *
66       * @see org.apache.jcs.auxiliary.lateral.behavior.ILateralCacheService#removeAll(java.lang.String,
67       *      long)
68       */
69      public void removeAll( String cacheName, long listenerId )
70      {
71          // zombies have no inner life
72      }
73  
74      /*
75       * (non-Javadoc)
76       *
77       * @see org.apache.jcs.auxiliary.lateral.behavior.ILateralCacheService#getGroupKeys(java.lang.String,
78       *      java.lang.String)
79       */
80      public Set getGroupKeys( String cacheName, String groupName )
81      {
82          return Collections.EMPTY_SET;
83      }
84  }