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1   package org.apache.commons.jcs.access.behavior;
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 org.apache.commons.jcs.access.exception.CacheException;
23  import org.apache.commons.jcs.engine.behavior.IElementAttributes;
24  
25  import java.util.Set;
26  
27  /**
28   * IGroupCacheAccess defines group specific behavior for the client access
29   * classes.
30   */
31  public interface IGroupCacheAccess<K, V>
32      extends ICacheAccessManagement
33  {
34      /**
35       * Gets the g attribute of the IGroupCacheAccess object
36       * <p>
37       * @param name
38       * @param group
39       *            the name of the group to associate this with.
40       * @return The object that is keyed by the name in the group
41       */
42      V getFromGroup( K name, String group );
43  
44      /**
45       * Puts an item in the cache associated with this group.
46       * <p>
47       * @param key
48       * @param group
49       * @param obj
50       * @throws CacheException
51       */
52      void putInGroup( K key, String group, V obj )
53          throws CacheException;
54  
55      /**
56       * Put in the cache associated with this group using these attributes.
57       * <p>
58       * @param key
59       * @param group
60       * @param obj
61       * @param attr
62       * @throws CacheException
63       */
64      void putInGroup( K key, String group, V obj, IElementAttributes attr )
65          throws CacheException;
66  
67      /**
68       * Remove the item from this group in this region by this name.
69       * <p>
70       * @param name
71       * @param group
72       */
73      void removeFromGroup( K name, String group );
74  
75      /**
76       * Gets the set of keys of objects currently in the group
77       * <p>
78       * @param group
79       * @return the set of group keys.
80       */
81      Set<K> getGroupKeys( String group );
82  
83      /**
84       * Invalidates a group
85       * <p>
86       * @param group
87       */
88      void invalidateGroup( String group );
89  }