1 /**
2 * Copyright 2003-2007 Greg Luck
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 net.sf.ehcache.constructs.blocking;
18
19
20 /**
21 * Creates objects to populate the cache.
22 * @version $Id: CacheEntryFactory.java 512 2007-07-10 09:18:45Z gregluck $
23 * @author Greg Luck
24 */
25 public interface CacheEntryFactory {
26 /**
27 * Creates the cacheEntry for the given cache key.
28 *
29 * ehcache requires cache entries to be serializable.
30 *
31 * Note that this method must be thread safe.
32 *
33 * @return The entry, or null if it does not exist.
34 * @throws Exception On failure creating the object.
35 */
36 Object createEntry(Object key) throws Exception;
37 }