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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.util.Hashtable;
23  import java.util.Map;
24  
25  import org.apache.jcs.engine.behavior.ICache;
26  
27  /***
28   * Used to associates a set of [cache listener to cache event queue] for a
29   * cache.
30   */
31  public class CacheListeners
32  {
33      /*** Description of the Field */
34      public final ICache cache;
35  
36      /*** Map ICacheListener to ICacheEventQueue */
37      public final Map eventQMap = new Hashtable();
38  
39      /***
40       * Constructs with the given cache.
41       * <p>
42       * @param cache
43       */
44      public CacheListeners( ICache cache )
45      {
46          if ( cache == null )
47          {
48              throw new IllegalArgumentException( "cache must not be null" );
49          }
50          this.cache = cache;
51      }
52  }