| 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.model; |
| 16 | |
| 17 | import java.util.HashMap; |
| 18 | import java.util.Map; |
| 19 | |
| 20 | import org.apache.commons.logging.Log; |
| 21 | import org.apache.hivemind.Resource; |
| 22 | import org.apache.hivemind.events.RegistryShutdownListener; |
| 23 | |
| 24 | import net.sf.ehcache.Cache; |
| 25 | import net.sf.ehcache.CacheException; |
| 26 | import net.sf.ehcache.CacheManager; |
| 27 | import net.sourceforge.hiveboard.Board; |
| 28 | import net.sourceforge.hiveboard.Event; |
| 29 | import net.sourceforge.hiveboard.EventType; |
| 30 | import net.sourceforge.hiveboard.event.ConstraintEventFilter; |
| 31 | import net.sourceforge.hiveboard.event.Constraints; |
| 32 | import net.sourceforge.hiveboard.event.EventsPriorities; |
| 33 | import net.sourceforge.hiveboard.event.PersistentDeferredConsumer; |
| 34 | import net.sourceforge.hiveboard.main.IdentityHolder; |
| 35 | import net.sourceforge.hiveevents.Channel; |
| 36 | import net.sourceforge.hiveevents.Filter; |
| 37 | import net.sourceforge.hiveutils.service.ObjectBuilder; |
| 38 | |
| 39 | /** |
| 40 | * @author Jean-Francois Poilpret |
| 41 | */ |
| 42 | public class BoardImageModelRepositoryImpl |
| 43 | implements BoardImageModelRepository, RegistryShutdownListener |
| 44 | { |
| 45 | public BoardImageModelRepositoryImpl( Log logger, |
| 46 | final BoardRepository repository, |
| 47 | final ObjectBuilder builder, |
| 48 | final Channel<Event> eventChannel, |
| 49 | final Channel<BoardImageModel> openBoardChannel, |
| 50 | final IdentityHolder holder, |
| 51 | final Resource cacheConfig) |
| 52 | throws CacheException |
| 53 | { |
| 54 | _logger = logger; |
| 55 | _logger.debug("<init>"); |
| 56 | |
| 57 | // Initialize images cache (memroy/disk) |
| 58 | _manager = CacheManager.create(cacheConfig.getResourceURL()); |
| 59 | _cache = _manager.getCache("BoardImageCache"); |
| 60 | |
| 61 | int priority = EventsPriorities.IMAGE_REPOSITORY_UPDATE; |
| 62 | String constraint = Constraints.eventTypeWho(holder.getId(), EventType.EVT_JOIN_BOARD); |
| 63 | Filter<Event> filter = new ConstraintEventFilter(constraint); |
| 64 | PersistentDeferredConsumer consumer = new PersistentDeferredConsumer() |
| 65 | { |
| 66 | @Override protected void pushEvent(Event event) |
| 67 | { |
| 68 | int id = event.getWhere(); |
| 69 | Board board = repository.getBoard(id); |
| 70 | byte[] raster = event.getRaster(); |
| 71 | byte[] action = event.getDrawingAction(); |
| 72 | // Create new ImageModel for Board |
| 73 | BoardImageModel model = (BoardImageModel) builder.create( |
| 74 | "BoardImageModel", _cache, board, raster, action); |
| 75 | _models.put(id, model); |
| 76 | // Add it to the board areas view |
| 77 | openBoardChannel.push(model); |
| 78 | } |
| 79 | }; |
| 80 | eventChannel.registerPushConsumer(priority, filter, consumer); |
| 81 | |
| 82 | // Listen to event of current user leaving a board |
| 83 | constraint = Constraints.eventTypeWho(holder.getId(), EventType.EVT_LEAVE_BOARD); |
| 84 | filter = new ConstraintEventFilter(constraint); |
| 85 | consumer = new PersistentDeferredConsumer() |
| 86 | { |
| 87 | @Override protected void pushEvent(Event event) |
| 88 | { |
| 89 | BoardImageModel model = _models.remove(event.getWhere()); |
| 90 | model.dispose(); |
| 91 | } |
| 92 | }; |
| 93 | eventChannel.registerPushConsumer(priority, filter, consumer); |
| 94 | } |
| 95 | |
| 96 | public void registryDidShutdown() |
| 97 | { |
| 98 | _logger.debug("registryShutDown()"); |
| 99 | _manager.shutdown(); |
| 100 | } |
| 101 | |
| 102 | public BoardImageModel getModel(int board) |
| 103 | { |
| 104 | return _models.get(board); |
| 105 | } |
| 106 | |
| 107 | public BoardImageModel[] getModels() |
| 108 | { |
| 109 | return _models.values().toArray(new BoardImageModel[_models.size()]); |
| 110 | } |
| 111 | |
| 112 | private final Log _logger; |
| 113 | private final Map<Integer, BoardImageModel> _models = |
| 114 | new HashMap<Integer, BoardImageModel>(); |
| 115 | private final CacheManager _manager; |
| 116 | private final Cache _cache; |
| 117 | } |