01: /*
02:
03: Derby - Class org.apache.derby.iapi.services.cache.SizedCacheable
04:
05: Licensed to the Apache Software Foundation (ASF) under one or more
06: contributor license agreements. See the NOTICE file distributed with
07: this work for additional information regarding copyright ownership.
08: The ASF licenses this file to you under the Apache License, Version 2.0
09: (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: * Get the estimated size of the cacheable object.
40: *
41: * @return the estimated size, in bytes
42: */
43: public int getSize();
44: }
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