ObjectPool


1   // Copyright 2004, 2005 The Apache Software Foundation
2   //
3   // Licensed under the Apache License, Version 2.0 (the "License");
4   // you may not use this file except in compliance with the License.
5   // You may obtain a copy of the License at
6   //
7   //     http://www.apache.org/licenses/LICENSE-2.0
8   //
9   // Unless required by applicable law or agreed to in writing, software
10  // distributed under the License is distributed on an "AS IS" BASIS,
11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  // See the License for the specific language governing permissions and
13  // limitations under the License.
14  
15  package org.apache.tapestry.services;
16  
17  
18  /**
19   * An pool for objects.  Objects may be stored in a Pool for later reuse.
20   *
21   * @author Howard Lewis Ship
22   * @since 4.0
23   */
24  public interface ObjectPool
25  {
26      /**
27       * Returns an object from the pool, previously stored with the given key. May
28       * return null if no such object exists.
29       */
30      Object   get(Object   key);
31      
32      /**
33       * Stores an object into the pool for later retrieval with the provided key.
34       */
35      
36      void store(Object   key, Object   value);
37  }
38

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