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Java > Open Source Codes > org > apache > derby > iapi > services > cache > SizedCacheable


1 /*
2
3    Derby - Class org.apache.derby.iapi.services.cache.SizedCacheable
4
5    Licensed to the Apache Software Foundation (ASF) under one or more
6    contributor license agreements. See the NOTICE file distributed with
7    this work for additional information regarding copyright ownership.
8    The ASF licenses this file to you under the Apache License, Version 2.0
9    (the "License"); you may not use this file except in compliance with
10    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, software
15    distributed under the License is distributed on an "AS IS" BASIS,
16    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17    See the License for the specific language governing permissions and
18    limitations under the License.
19
20  */
21
22 package org.apache.derby.iapi.services.cache;
23
24 /**
25  * This interface extends the Cacheable interface (@see Cacheable) with a method that
26  * estimates the size of the Cacheable object, in bytes. CacheManagers constructed with the SizedCacheFactory
27  * interface regulate the total estimated cache size, in bytes.
28  * CacheManagers constructed with the CacheFactory use regulate the total number of cache entries.
29  *
30  * @see Cacheable
31  * @see CacheFactory
32  *
33  * @author Jack Klebanoff
34  */
35
36 public interface SizedCacheable extends Cacheable
37 {
38
39     /**
40      * Get the estimated size of the cacheable object.
41      *
42      * @return the estimated size, in bytes
43      */
44     public int getSize();
45 }
46
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