1 /**
2 * This file Copyright (c) 2017 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.dam.imaging.caching;
35
36 import info.magnolia.dam.jcr.AssetNodeTypes;
37 import info.magnolia.imaging.ParameterProvider;
38 import info.magnolia.imaging.caching.NodeBasedCachingStrategy;
39 import info.magnolia.jcr.util.NodeTypes;
40 import info.magnolia.jcr.util.NodeUtil;
41
42 import java.util.Calendar;
43
44 import javax.jcr.Node;
45 import javax.jcr.Property;
46 import javax.jcr.RepositoryException;
47
48 /**
49 * NodeBasedCachingStrategy which use last modified time of "asset" if node is descendant of "asset".
50 */
51 public class AssetAndNodeBaseCachingStrategy extends NodeBasedCachingStrategy {
52
53 @Override
54 public boolean shouldRegenerate(Property cachedBinary, ParameterProvider<Node> parameterProvider) {
55 try {
56 final Calendar cacheLastMod = NodeTypes.LastModified.getLastModified(cachedBinary.getParent());
57
58 final Node node = getContent(parameterProvider.getParameter());
59 final Calendar srcLastMod;
60 if (node.isNodeType(AssetNodeTypes.Asset.NAME)) {
61 srcLastMod = NodeTypes.LastModified.getLastModified(node);
62 } else {
63 final Node asset = NodeUtil.getNearestAncestorOfType(node, AssetNodeTypes.Asset.NAME);
64 if (asset != null) {
65 srcLastMod = NodeTypes.LastModified.getLastModified(asset);
66 } else {
67 srcLastMod = NodeTypes.LastModified.getLastModified(node);
68 }
69 }
70
71 if (srcLastMod == null ) {
72 // no srcLastMod update, means likely also no source at all ...
73 return false;
74 }
75 if (cacheLastMod == null) {
76 // no cacheLstMod update, means that the copy is stale or not created properly
77 return true;
78 }
79 return cacheLastMod.before(srcLastMod);
80 } catch (RepositoryException e) {
81 throw new RuntimeException(e);
82 }
83 }
84
85 }