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Java > Open Source Codes > org > springframework > aop > framework > TimeStamped


1 /*
2  * Copyright 2002-2005 the original author or authors.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16
17 package org.springframework.aop.framework;
18
19 /**
20  * This interface can be implemented by cacheable objects or cache entries,
21  * to enable the freshness of objects to be checked.
22  *
23  * @author Rod Johnson
24  */
25 public interface TimeStamped {
26     
27     /**
28      * Return the timestamp for this object.
29      * @return long the timestamp for this object,
30      * as returned by System.currentTimeMillis()
31      */
32     long getTimeStamp();
33
34 }
35
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