01: /*
02: * hgcommons 7
03: * Hammurapi Group Common Library
04: * Copyright (C) 2003 Hammurapi Group
05: *
06: * This program is free software; you can redistribute it and/or
07: * modify it under the terms of the GNU Lesser General Public
08: * License as published by the Free Software Foundation; either
09: * version 2 of the License, or (at your option) any later version.
10: *
11: * This program is distributed in the hope that it will be useful,
12: * but WITHOUT ANY WARRANTY; without even the implied warranty of
13: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14: * Lesser General Public License for more details.
15: *
16: * You should have received a copy of the GNU Lesser General Public
17: * License along with this library; if not, write to the Free Software
18: * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19: *
20: * URL: http://www.hammurapi.biz/hammurapi-biz/ef/xmenu/hammurapi-group/products/products/hgcommons/index.html
21: * e-Mail: support@hammurapi.biz
22: */
23: package biz.hammurapi.cache;
24:
25: import java.util.Timer;
26:
27: import biz.hammurapi.metrics.MeasurementCategory;
28:
29: /**
30: * Cache which supports addition of entries.
31: * @author Pavel Vlasov
32: * @revision $Revision$
33: */
34: public class AppendableMemoryCache extends MemoryCache implements
35: AppendableCache {
36:
37: public AppendableMemoryCache(AppendableProducer producer,
38: Cache fallBack, MeasurementCategory measurementCategory) {
39: super (producer, fallBack, measurementCategory);
40: }
41:
42: public AppendableMemoryCache(AppendableProducer producer,
43: Cache fallBack, MeasurementCategory measurementCategory,
44: Timer timer, long cleanupInterval) {
45: super (producer, fallBack, measurementCategory, timer,
46: cleanupInterval);
47: }
48:
49: public Object add(Object value, long time, long expirationTime) {
50: synchronized (cache) {
51: if (reverseCache.containsKey(value)) {
52: return reverseCache.get(value);
53: }
54: }
55:
56: Object key = ((AppendableProducer) producer).add(value);
57: put(key, value, time, expirationTime);
58: return key;
59: }
60:
61: }
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