| 1 | // Copyright 2004-2007 Jean-Francois Poilpret |
| 2 | // |
| 3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | // you may not use this file except in compliance with the License. |
| 5 | // You may obtain a copy of the License at |
| 6 | // |
| 7 | // http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | // |
| 9 | // Unless required by applicable law or agreed to in writing, software |
| 10 | // distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | // See the License for the specific language governing permissions and |
| 13 | // limitations under the License. |
| 14 | |
| 15 | package net.sourceforge.hiveboard.business; |
| 16 | |
| 17 | import java.util.HashMap; |
| 18 | import java.util.Map; |
| 19 | |
| 20 | import org.apache.commons.logging.Log; |
| 21 | |
| 22 | import org.apache.hivemind.Resource; |
| 23 | import org.apache.hivemind.events.RegistryShutdownListener; |
| 24 | |
| 25 | import net.sf.ehcache.Cache; |
| 26 | import net.sf.ehcache.CacheException; |
| 27 | import net.sf.ehcache.CacheManager; |
| 28 | |
| 29 | import net.sourceforge.hiveboard.Board; |
| 30 | import net.sourceforge.hiveboard.dao.BoardDAO; |
| 31 | import net.sourceforge.hiveutils.service.ObjectTools; |
| 32 | |
| 33 | /** |
| 34 | * Implementation of the Board Repository service. |
| 35 | * The repository is initalized from the database at construction time. |
| 36 | * |
| 37 | * @author Jean-Francois Poilpret |
| 38 | */ |
| 39 | public class BoardRepositoryImpl implements BoardRepository, RegistryShutdownListener |
| 40 | { |
| 41 | public BoardRepositoryImpl( Log logger, |
| 42 | BoardDAO dao, |
| 43 | ObjectTools objectTools, |
| 44 | Resource cacheConfig, |
| 45 | long updateImageTime) |
| 46 | throws CacheException |
| 47 | { |
| 48 | _logger = logger; |
| 49 | _dao = dao; |
| 50 | _objectTools = objectTools; |
| 51 | // Read all Boards (except images) |
| 52 | _boards = _dao.selectActiveBoards(); |
| 53 | _maxDiscriminator = dao.selectMaxDiscriminator(); |
| 54 | _manager = CacheManager.create(cacheConfig.getResourceURL()); |
| 55 | _cache = _manager.getCache("BoardImageCache"); |
| 56 | _updateImageTime = updateImageTime; |
| 57 | _imageUpdater = new Thread(new Runnable() |
| 58 | { |
| 59 | public void run() |
| 60 | { |
| 61 | loopImageUpdate(); |
| 62 | } |
| 63 | }); |
| 64 | _imageUpdater.start(); |
| 65 | } |
| 66 | |
| 67 | synchronized private void loopImageUpdate() |
| 68 | { |
| 69 | while (!_stopped) |
| 70 | { |
| 71 | try |
| 72 | { |
| 73 | wait(_updateImageTime); |
| 74 | } |
| 75 | catch (InterruptedException e) |
| 76 | { |
| 77 | _logger.error("loopImageUpdate()", e); |
| 78 | } |
| 79 | saveAllImages(); |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | public void registryDidShutdown() |
| 84 | { |
| 85 | synchronized (this) |
| 86 | { |
| 87 | // Stop image saving thread |
| 88 | // (this will force save of all Images to DB) |
| 89 | _stopped = true; |
| 90 | notifyAll(); |
| 91 | } |
| 92 | waitEndImageUpdaterThread(); |
| 93 | } |
| 94 | |
| 95 | private void waitEndImageUpdaterThread() |
| 96 | { |
| 97 | try |
| 98 | { |
| 99 | // Wait until thread has finished saving all images |
| 100 | _imageUpdater.join(); |
| 101 | _logger.debug("waitEndImageUpdaterThread() ImageUpdater Thread joined"); |
| 102 | } |
| 103 | catch (InterruptedException e) |
| 104 | { |
| 105 | _logger.error("waitEndImageUpdaterThread()", e); |
| 106 | } |
| 107 | } |
| 108 | |
| 109 | synchronized private void saveAllImages() |
| 110 | { |
| 111 | _logger.debug("saveAllImages()"); |
| 112 | for (BoardImageHolder holder: _holders.values()) |
| 113 | { |
| 114 | holder.save(); |
| 115 | } |
| 116 | } |
| 117 | |
| 118 | synchronized public Board getBoard(int id, boolean clone) |
| 119 | { |
| 120 | Board board = _boards.get(id); |
| 121 | if (board == null) |
| 122 | { |
| 123 | return null; |
| 124 | } |
| 125 | if (clone) |
| 126 | { |
| 127 | return board.copy(); |
| 128 | } |
| 129 | else |
| 130 | { |
| 131 | return board; |
| 132 | } |
| 133 | } |
| 134 | |
| 135 | synchronized public void changeBoard(Board board) |
| 136 | { |
| 137 | if (board == null) |
| 138 | { |
| 139 | return; |
| 140 | } |
| 141 | _boards.put(board.getId(), board); |
| 142 | } |
| 143 | |
| 144 | synchronized public void addBoard(Board board) |
| 145 | { |
| 146 | if (board == null) |
| 147 | { |
| 148 | return; |
| 149 | } |
| 150 | _boards.put(board.getId(), board); |
| 151 | } |
| 152 | |
| 153 | synchronized public int removeBoard(int id) |
| 154 | { |
| 155 | _boards.remove(id); |
| 156 | removeImageHolder(id); |
| 157 | _maxDiscriminator++; |
| 158 | return _maxDiscriminator; |
| 159 | } |
| 160 | |
| 161 | synchronized public Board[] getBoards(boolean clone) |
| 162 | { |
| 163 | Board[] boards = _boards.values().toArray(new Board[_boards.size()]); |
| 164 | if (clone) |
| 165 | { |
| 166 | for (int i = 0; i < boards.length; i++) |
| 167 | { |
| 168 | boards[i] = boards[i].copy(); |
| 169 | } |
| 170 | } |
| 171 | return boards; |
| 172 | } |
| 173 | |
| 174 | public BoardImageHolder getImageHolder(int idBoard) |
| 175 | { |
| 176 | Board board = getBoard(idBoard, true); |
| 177 | BoardImageHolder holder = getHolder(idBoard); |
| 178 | if (holder == null) |
| 179 | { |
| 180 | holder = new BoardImageHolderImpl(_dao, _objectTools, _cache, board); |
| 181 | setHolder(idBoard, holder); |
| 182 | } |
| 183 | return holder; |
| 184 | } |
| 185 | |
| 186 | synchronized private BoardImageHolder getHolder(int idBoard) |
| 187 | { |
| 188 | return _holders.get(idBoard); |
| 189 | } |
| 190 | |
| 191 | synchronized private void setHolder(int idBoard, BoardImageHolder holder) |
| 192 | { |
| 193 | _holders.put(idBoard, holder); |
| 194 | } |
| 195 | |
| 196 | synchronized public void removeImageHolder(int board) |
| 197 | { |
| 198 | BoardImageHolder holder = _holders.remove(board); |
| 199 | if (holder != null) |
| 200 | { |
| 201 | holder.save(); |
| 202 | holder.dispose(); |
| 203 | } |
| 204 | } |
| 205 | |
| 206 | private final Log _logger; |
| 207 | private final BoardDAO _dao; |
| 208 | private final ObjectTools _objectTools; |
| 209 | private final Map<Integer, Board> _boards; |
| 210 | private int _maxDiscriminator; |
| 211 | private final Map<Integer, BoardImageHolder> _holders = |
| 212 | new HashMap<Integer, BoardImageHolder>(); |
| 213 | private final CacheManager _manager; |
| 214 | private final Cache _cache; |
| 215 | private final long _updateImageTime; |
| 216 | private final Thread _imageUpdater; |
| 217 | private boolean _stopped = false; |
| 218 | } |