1 /**
2 * This file Copyright (c) 2008-2011 Magnolia International
3 * Ltd. (http://www.magnolia-cms.com). All rights reserved.
4 *
5 *
6 * This file is dual-licensed under both the Magnolia
7 * Network Agreement and the GNU General Public License.
8 * You may elect to use one or the other of these licenses.
9 *
10 * This file is distributed in the hope that it will be
11 * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
12 * implied warranty of MERCHANTABILITY or FITNESS FOR A
13 * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
14 * Redistribution, except as permitted by whichever of the GPL
15 * or MNA you select, is prohibited.
16 *
17 * 1. For the GPL license (GPL), you can redistribute and/or
18 * modify this file under the terms of the GNU General
19 * Public License, Version 3, as published by the Free Software
20 * Foundation. You should have received a copy of the GNU
21 * General Public License, Version 3 along with this program;
22 * if not, write to the Free Software Foundation, Inc., 51
23 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
24 *
25 * 2. For the Magnolia Network Agreement (MNA), this file
26 * and the accompanying materials are made available under the
27 * terms of the MNA which accompanies this distribution, and
28 * is available at http://www.magnolia-cms.com/mna.html
29 *
30 * Any modifications to this file must keep this entire header
31 * intact.
32 *
33 */
34 package info.magnolia.module.cache;
35
36 import info.magnolia.context.MgnlContext;
37
38 /**
39 * CachePolicy returns instances of this class - depending on the value
40 * of the behaviour property, the cacheKey and cachedEntry values might
41 * be set or not.
42 *
43 * @author gjoseph
44 * @version $Revision: $ ($Author: $)
45 */
46 public class CachePolicyResult {
47 public static final CachePolicyBehaviour store = new CachePolicyBehaviour("store");
48 public static final CachePolicyBehaviour useCache = new CachePolicyBehaviour("useCache");
49 public static final CachePolicyBehaviour bypass = new CachePolicyBehaviour("bypass");
50
51 private final CachePolicyBehaviour behaviour;
52 private final Object cacheKey;
53 private Object cachedEntry;
54
55 public CachePolicyResult(CachePolicyBehaviour behaviour, Object cacheKey, Object cachedEntry) {
56 this.behaviour = behaviour;
57 this.cacheKey = cacheKey;
58 this.cachedEntry = cachedEntry;
59 }
60
61 public CachePolicyBehaviour getBehaviour() {
62 return behaviour;
63 }
64
65 public Object getCacheKey() {
66 return cacheKey;
67 }
68
69 public Object getCachedEntry() {
70 return cachedEntry;
71 }
72
73 public String toString() {
74 return "CachePolicyResult{" +
75 "behaviour=" + behaviour +
76 ", cacheKey=" + cacheKey +
77 ", cachedEntry=" + cachedEntry +
78 '}';
79 }
80
81 /**
82 * Descriptor of the cache policy behavior used by this cache policy result.
83 */
84 public final static class CachePolicyBehaviour {
85 private final String name;
86
87 private CachePolicyBehaviour(String name) {
88 this.name = name;
89 }
90
91 public String toString() {
92 return name;
93 }
94
95 public String getName() {
96 return name;
97 }
98 }
99
100 public void setCachedEntry(Object entry) {
101 cachedEntry = entry;
102 }
103
104 /**
105 * Saves the result in the context and makes it available by {@link #getCurrent()}.
106 */
107 public static void setCurrent(CachePolicyResult cachePolicyResult) {
108 MgnlContext.setAttribute(CachePolicyResult.class.getName(), cachePolicyResult);
109 }
110
111 /**
112 * Returns the current {@link CachePolicyResult} which was set by the {@link CacheFilter}.
113 */
114 public static CachePolicyResult getCurrent(){
115 return (CachePolicyResult) MgnlContext.getAttribute(CachePolicyResult.class.getName());
116 }
117
118 }