1 /*
2 * This file is part of *** M y C o R e ***
3 * See http://www.mycore.de/ for details.
4 *
5 * MyCoRe is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
9 *
10 * MyCoRe is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with MyCoRe. If not, see <http://www.gnu.org/licenses/>.
17 */
18
19 package org.mycore.datamodel.common;
20
21 import java.util.Collection;
22 import java.util.Map;
23 import java.util.concurrent.ConcurrentHashMap;
24 import java.util.concurrent.ConcurrentLinkedQueue;
25
26 import org.mycore.common.MCRCatchException;
27
28 /**
29 * This exception holds information about a link condition that did not allow a
30 * certain action to be performed.
31 *
32 * As this exception does not extend RuntimeException it has to be caught for
33 * data integrity reasons.
34 *
35 * @author Thomas Scheffler (yagee)
36 */
37 public class MCRActiveLinkException extends MCRCatchException {
38
39 /**
40 *
41 */
42 private static final long serialVersionUID = 1L;
43
44 Map<String, Collection<String>> linkTable = new ConcurrentHashMap<>();
45
46 /**
47 *
48 * @return a Hashtable with destinations (key) and List of sources (value)
49 */
50 public Map<String, Collection<String>> getActiveLinks() {
51 return linkTable;
52 }
53
54 /**
55 * collects information on active links that do not permit a certain action
56 * on the repository.
57 *
58 * @param source
59 * the source of a link
60 * @param dest
61 * the destination of a link
62 */
63 public void addLink(String source, String dest) {
64 if (!linkTable.containsKey(dest)) {
65 linkTable.put(dest, new ConcurrentLinkedQueue<>());
66 }
67 linkTable.get(dest).add(source);
68 }
69
70 /**
71 * @see MCRCatchException#MCRCatchException(String)
72 */
73 public MCRActiveLinkException(String message) {
74 super(message);
75 }
76
77 /**
78 * @see MCRCatchException#MCRCatchException(String, Throwable)
79 */
80 public MCRActiveLinkException(String message, Throwable cause) {
81 super(message, cause);
82 }
83
84 }