src/main/java/net/pterodactylus/sone/database/memory/MemoryDatabase.java

   1 /*
   2  * Sone - MemoryDatabase.java - Copyright © 2013 David Roden
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 package net.pterodactylus.sone.database.memory;
  19
  20 import static com.google.common.base.Optional.fromNullable;
  21 import static com.google.common.base.Preconditions.checkNotNull;
  22 import static com.google.common.base.Predicates.not;
  23 import static com.google.common.collect.FluentIterable.from;
  24 import static java.lang.String.format;
  25 import static java.util.logging.Level.WARNING;
  26 import static net.pterodactylus.sone.data.Reply.TIME_COMPARATOR;
  27 import static net.pterodactylus.sone.data.Sone.LOCAL_SONE_FILTER;
  28 import static net.pterodactylus.sone.data.Sone.toAllAlbums;
  29 import static net.pterodactylus.sone.data.Sone.toAllImages;
  30
  31 import java.util.Collection;
  32 import java.util.Collections;
  33 import java.util.Comparator;
  34 import java.util.HashMap;
  35 import java.util.HashSet;
  36 import java.util.List;
  37 import java.util.Map;
  38 import java.util.Set;
  39 import java.util.concurrent.locks.ReadWriteLock;
  40 import java.util.concurrent.locks.ReentrantReadWriteLock;
  41 import java.util.logging.Level;
  42 import java.util.logging.Logger;
  43
  44 import net.pterodactylus.sone.core.ConfigurationSoneParser;
  45 import net.pterodactylus.sone.core.ConfigurationSoneParser.InvalidAlbumFound;
  46 import net.pterodactylus.sone.core.ConfigurationSoneParser.InvalidImageFound;
  47 import net.pterodactylus.sone.core.ConfigurationSoneParser.InvalidParentAlbumFound;
  48 import net.pterodactylus.sone.core.ConfigurationSoneParser.InvalidPostFound;
  49 import net.pterodactylus.sone.core.ConfigurationSoneParser.InvalidPostReplyFound;
  50 import net.pterodactylus.sone.data.Album;
  51 import net.pterodactylus.sone.data.Client;
  52 import net.pterodactylus.sone.data.Image;
  53 import net.pterodactylus.sone.data.LocalSone;
  54 import net.pterodactylus.sone.data.Post;
  55 import net.pterodactylus.sone.data.PostReply;
  56 import net.pterodactylus.sone.data.Profile;
  57 import net.pterodactylus.sone.data.Profile.Field;
  58 import net.pterodactylus.sone.data.Sone;
  59 import net.pterodactylus.sone.data.Sone.ShowCustomAvatars;
  60 import net.pterodactylus.sone.data.impl.AlbumBuilderImpl;
  61 import net.pterodactylus.sone.data.impl.ImageBuilderImpl;
  62 import net.pterodactylus.sone.database.AlbumBuilder;
  63 import net.pterodactylus.sone.database.Database;
  64 import net.pterodactylus.sone.database.DatabaseException;
  65 import net.pterodactylus.sone.database.ImageBuilder;
  66 import net.pterodactylus.sone.database.PostBuilder;
  67 import net.pterodactylus.sone.database.PostDatabase;
  68 import net.pterodactylus.sone.database.PostReplyBuilder;
  69 import net.pterodactylus.sone.database.SoneBuilder;
  70 import net.pterodactylus.sone.database.SoneProvider;
  71 import net.pterodactylus.sone.freenet.wot.OwnIdentity;
  72 import net.pterodactylus.sone.main.SonePlugin;
  73 import net.pterodactylus.sone.utils.Optionals;
  74 import net.pterodactylus.util.config.Configuration;
  75 import net.pterodactylus.util.config.ConfigurationException;
  76
  77 import com.google.common.base.Function;
  78 import com.google.common.base.Optional;
  79 import com.google.common.base.Predicate;
  80 import com.google.common.collect.FluentIterable;
  81 import com.google.common.collect.HashMultimap;
  82 import com.google.common.collect.Multimap;
  83 import com.google.common.collect.SortedSetMultimap;
  84 import com.google.common.collect.TreeMultimap;
  85 import com.google.common.primitives.Longs;
  86 import com.google.common.util.concurrent.AbstractService;
  87 import com.google.inject.Inject;
  88 import com.google.inject.Singleton;
  89
  90 /**
  91  * Memory-based {@link PostDatabase} implementation.
  92  *
  93  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  94  */
  95 @Singleton
  96 public class MemoryDatabase extends AbstractService implements Database {
  97
  98         private static final Logger logger = Logger.getLogger("Sone.Database.Memory");
  99         private static final String LATEST_EDITION_PROPERTY = "Sone.LatestEdition";
 100         /** The lock. */
 101         private final ReadWriteLock lock = new ReentrantReadWriteLock();
 102
 103         /** The Sone provider. */
 104         private final SoneProvider soneProvider;
 105
 106         /** The configuration. */
 107         private final Configuration configuration;
 108         private final ConfigurationLoader configurationLoader;
 109
 110         private final Set<String> localSones = new HashSet<String>();
 111         private final Map<String, Sone> allSones = new HashMap<String, Sone>();
 112         private final Map<String, String> lastInsertFingerprints = new HashMap<String, String>();
 113
 114         /** All post replies by their ID. */
 115         private final Map<String, PostReply> allPostReplies = new HashMap<String, PostReply>();
 116
 117         /** Replies sorted by Sone. */
 118         private final SortedSetMultimap<String, PostReply> sonePostReplies = TreeMultimap.create(new Comparator<String>() {
 119
 120                 @Override
 121                 public int compare(String leftString, String rightString) {
 122                         return leftString.compareTo(rightString);
 123                 }
 124         }, TIME_COMPARATOR);
 125
 126         /** Whether post replies are known. */
 127         private final Set<String> knownPostReplies = new HashSet<String>();
 128
 129         private final Map<String, Album> allAlbums = new HashMap<String, Album>();
 130         private final Multimap<String, Album> soneAlbums = HashMultimap.create();
 131
 132         private final Map<String, Image> allImages = new HashMap<String, Image>();
 133         private final Multimap<String, Image> soneImages = HashMultimap.create();
 134
 135         private final MemoryPostDatabase postDatabase;
 136         private final MemoryBookmarkDatabase memoryBookmarkDatabase;
 137         private final MemoryFriendDatabase memoryFriendDatabase;
 138
 139         /**
 140          * Creates a new memory database.
 141          *
 142          * @param soneProvider
 143          *              The Sone provider
 144          * @param configuration
 145          *              The configuration for loading and saving elements
 146          */
 147         @Inject
 148         public MemoryDatabase(SoneProvider soneProvider, Configuration configuration) {
 149                 this.soneProvider = soneProvider;
 150                 this.configuration = configuration;
 151                 this.configurationLoader = new ConfigurationLoader(configuration);
 152                 postDatabase = new MemoryPostDatabase(this, configurationLoader);
 153                 memoryBookmarkDatabase =
 154                                 new MemoryBookmarkDatabase(this, configurationLoader);
 155                 memoryFriendDatabase = new MemoryFriendDatabase(configurationLoader);
 156         }
 157
 158         //
 159         // DATABASE METHODS
 160         //
 161
 162         @Override
 163         public Optional<LocalSone> getLocalSone(String localSoneId) {
 164                 lock.readLock().lock();
 165                 try {
 166                         if (!localSones.contains(localSoneId)) {
 167                                 return Optional.absent();
 168                         }
 169                         return Optional.of((LocalSone) allSones.get(localSoneId));
 170                 } finally {
 171                         lock.readLock().unlock();
 172                 }
 173         }
 174
 175         @Override
 176         public Sone registerLocalSone(OwnIdentity ownIdentity) {
 177                 final Sone localSone = loadLocalSone(ownIdentity);
 178                 localSones.add(ownIdentity.getId());
 179                 return localSone;
 180         }
 181
 182         private Sone loadLocalSone(OwnIdentity ownIdentity) {
 183                 Sone localSone = newSoneBuilder().local().from(ownIdentity).build();
 184                 localSone.setLatestEdition(
 185                                 Optional.fromNullable(
 186                                                 Longs.tryParse(ownIdentity.getProperty(LATEST_EDITION_PROPERTY)))
 187                                 .or(0L));
 188                 localSone.setClient(new Client("Sone", SonePlugin.VERSION.toString()));
 189                 localSone.setKnown(true);
 190
 191                 loadSone(localSone);
 192                 return localSone;
 193         }
 194
 195         public void loadSone(Sone sone) {
 196                 long soneTime = configurationLoader.getLocalSoneTime(sone.getId());
 197                 if (soneTime == -1) {
 198                         return;
 199                 }
 200
 201                 /* load profile. */
 202                 ConfigurationSoneParser configurationSoneParser = new ConfigurationSoneParser(configuration, sone);
 203                 Profile profile = configurationSoneParser.parseProfile();
 204
 205                 /* load posts. */
 206                 Collection<Post> posts;
 207                 try {
 208                         posts = configurationSoneParser.parsePosts(this);
 209                 } catch (InvalidPostFound ipf) {
 210                         logger.log(Level.WARNING, "Invalid post found, aborting load!");
 211                         return;
 212                 }
 213
 214                 /* load replies. */
 215                 Collection<PostReply> postReplies;
 216                 try {
 217                         postReplies = configurationSoneParser.parsePostReplies(this);
 218                 } catch (InvalidPostReplyFound iprf) {
 219                         logger.log(Level.WARNING, "Invalid reply found, aborting load!");
 220                         return;
 221                 }
 222
 223                 /* load post likes. */
 224                 Set<String> likedPostIds = configurationSoneParser.parseLikedPostIds();
 225
 226                 /* load reply likes. */
 227                 Set<String> likedReplyIds = configurationSoneParser.parseLikedPostReplyIds();
 228
 229                 /* load albums. */
 230                 List<Album> topLevelAlbums;
 231                 try {
 232                         topLevelAlbums = configurationSoneParser.parseTopLevelAlbums(this);
 233                 } catch (InvalidAlbumFound iaf) {
 234                         logger.log(Level.WARNING, "Invalid album found, aborting load!");
 235                         return;
 236                 } catch (InvalidParentAlbumFound ipaf) {
 237                         logger.log(Level.WARNING,
 238                                         format("Invalid parent album ID: %s", ipaf.getAlbumParentId()));
 239                         return;
 240                 }
 241
 242                 /* load images. */
 243                 try {
 244                         configurationSoneParser.parseImages(this);
 245                 } catch (InvalidImageFound iif) {
 246                         logger.log(WARNING, "Invalid image found, aborting load!");
 247                         return;
 248                 } catch (InvalidParentAlbumFound ipaf) {
 249                         logger.log(Level.WARNING,
 250                                         format("Invalid album image (%s) encountered, aborting load!",
 251                                                         ipaf.getAlbumParentId()));
 252                         return;
 253                 }
 254
 255                 /* load avatar. */
 256                 String sonePrefix = "Sone/" + sone.getId();
 257                 String avatarId = configuration.getStringValue(sonePrefix + "/Profile/Avatar").getValue(null);
 258                 if (avatarId != null) {
 259                         final Map<String, Image> images = configurationSoneParser.getImages();
 260                         profile.setAvatar(images.get(avatarId));
 261                 }
 262
 263                 /* load options. */
 264                 sone.getOptions().setAutoFollow(configuration.getBooleanValue(sonePrefix + "/Options/AutoFollow").getValue(null));
 265                 sone.getOptions().setSoneInsertNotificationEnabled(configuration.getBooleanValue(sonePrefix + "/Options/EnableSoneInsertNotifications").getValue(null));
 266                 sone.getOptions().setShowNewSoneNotifications(configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewSones").getValue(null));
 267                 sone.getOptions().setShowNewPostNotifications(configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewPosts").getValue(null));
 268                 sone.getOptions().setShowNewReplyNotifications(configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewReplies").getValue(null));
 269                 sone.getOptions().setShowCustomAvatars(ShowCustomAvatars.valueOf(
 270                                 configuration.getStringValue(sonePrefix + "/Options/ShowCustomAvatars")
 271                                                 .getValue(ShowCustomAvatars.NEVER.name())));
 272
 273                 /* if we’re still here, Sone was loaded successfully. */
 274                 lock.writeLock().lock();
 275                 try {
 276                         sone.setTime(soneTime);
 277                         sone.setProfile(profile);
 278                         sone.setLikePostIds(likedPostIds);
 279                         sone.setLikeReplyIds(likedReplyIds);
 280
 281                         String lastInsertFingerprint = configurationLoader.getLastInsertFingerprint(sone.getId());
 282                         lastInsertFingerprints.put(sone.getId(), lastInsertFingerprint);
 283
 284                         allSones.put(sone.getId(), sone);
 285                         storePosts(sone.getId(), posts);
 286                         storePostReplies(sone.getId(), postReplies);
 287                         storeAlbums(sone.getId(), topLevelAlbums);
 288                         storeImages(sone.getId(), from(topLevelAlbums).transformAndConcat(Album.FLATTENER).transformAndConcat(Album.IMAGES).toList());
 289                 } finally {
 290                         lock.writeLock().unlock();
 291                 }
 292                 for (Post post : posts) {
 293                         post.setKnown(true);
 294                 }
 295                 for (PostReply reply : postReplies) {
 296                         reply.setKnown(true);
 297                 }
 298
 299                 logger.info(String.format("Sone loaded successfully: %s", sone));
 300         }
 301
 302         @Override
 303         public String getLastInsertFingerprint(Sone sone) {
 304                 lock.readLock().lock();
 305                 try {
 306                         if (!lastInsertFingerprints.containsKey(sone.getId())) {
 307                                 return "";
 308                         }
 309                         return lastInsertFingerprints.get(sone.getId());
 310                 } finally {
 311                         lock.readLock().unlock();
 312                 }
 313         }
 314
 315         @Override
 316         public void setLastInsertFingerprint(Sone sone, String lastInsertFingerprint) {
 317                 lock.writeLock().lock();
 318                 try {
 319                         lastInsertFingerprints.put(sone.getId(), lastInsertFingerprint);
 320                 } finally {
 321                         lock.writeLock().unlock();
 322                 }
 323         }
 324
 325         /**
 326          * Saves the database.
 327          *
 328          * @throws DatabaseException
 329          *              if an error occurs while saving
 330          */
 331         @Override
 332         public void save() throws DatabaseException {
 333                 lock.writeLock().lock();
 334                 try {
 335                         saveKnownPostReplies();
 336                         for (Sone localSone : from(localSones).transform(soneLoader()).transform(Optionals.<Sone>get())) {
 337                                 saveSone(localSone);
 338                         }
 339                 } finally {
 340                         lock.writeLock().unlock();
 341                 }
 342         }
 343
 344         private synchronized void saveSone(Sone sone) {
 345                 logger.log(Level.INFO, String.format("Saving Sone: %s", sone));
 346                 try {
 347                         /* save Sone into configuration. */
 348                         String sonePrefix = "Sone/" + sone.getId();
 349                         configuration.getLongValue(sonePrefix + "/Time").setValue(sone.getTime());
 350                         configuration.getStringValue(sonePrefix + "/LastInsertFingerprint").setValue(lastInsertFingerprints.get(sone.getId()));
 351
 352                         /* save profile. */
 353                         Profile profile = sone.getProfile();
 354                         configuration.getStringValue(sonePrefix + "/Profile/FirstName").setValue(profile.getFirstName());
 355                         configuration.getStringValue(sonePrefix + "/Profile/MiddleName").setValue(profile.getMiddleName());
 356                         configuration.getStringValue(sonePrefix + "/Profile/LastName").setValue(profile.getLastName());
 357                         configuration.getIntValue(sonePrefix + "/Profile/BirthDay").setValue(profile.getBirthDay());
 358                         configuration.getIntValue(sonePrefix + "/Profile/BirthMonth").setValue(profile.getBirthMonth());
 359                         configuration.getIntValue(sonePrefix + "/Profile/BirthYear").setValue(profile.getBirthYear());
 360                         configuration.getStringValue(sonePrefix + "/Profile/Avatar").setValue(profile.getAvatar());
 361
 362                         /* save profile fields. */
 363                         int fieldCounter = 0;
 364                         for (Field profileField : profile.getFields()) {
 365                                 String fieldPrefix = sonePrefix + "/Profile/Fields/" + fieldCounter++;
 366                                 configuration.getStringValue(fieldPrefix + "/Name").setValue(profileField.getName());
 367                                 configuration.getStringValue(fieldPrefix + "/Value").setValue(profileField.getValue());
 368                         }
 369                         configuration.getStringValue(sonePrefix + "/Profile/Fields/" + fieldCounter + "/Name").setValue(null);
 370
 371                         /* save posts. */
 372                         int postCounter = 0;
 373                         for (Post post : sone.getPosts()) {
 374                                 String postPrefix = sonePrefix + "/Posts/" + postCounter++;
 375                                 configuration.getStringValue(postPrefix + "/ID").setValue(post.getId());
 376                                 configuration.getStringValue(postPrefix + "/Recipient").setValue(post.getRecipientId().orNull());
 377                                 configuration.getLongValue(postPrefix + "/Time").setValue(post.getTime());
 378                                 configuration.getStringValue(postPrefix + "/Text").setValue(post.getText());
 379                         }
 380                         configuration.getStringValue(sonePrefix + "/Posts/" + postCounter + "/ID").setValue(null);
 381
 382                         /* save replies. */
 383                         int replyCounter = 0;
 384                         for (PostReply reply : sone.getReplies()) {
 385                                 String replyPrefix = sonePrefix + "/Replies/" + replyCounter++;
 386                                 configuration.getStringValue(replyPrefix + "/ID").setValue(reply.getId());
 387                                 configuration.getStringValue(replyPrefix + "/Post/ID").setValue(reply.getPostId());
 388                                 configuration.getLongValue(replyPrefix + "/Time").setValue(reply.getTime());
 389                                 configuration.getStringValue(replyPrefix + "/Text").setValue(reply.getText());
 390                         }
 391                         configuration.getStringValue(sonePrefix + "/Replies/" + replyCounter + "/ID").setValue(null);
 392
 393                         /* save post likes. */
 394                         int postLikeCounter = 0;
 395                         for (String postId : sone.getLikedPostIds()) {
 396                                 configuration.getStringValue(sonePrefix + "/Likes/Post/" + postLikeCounter++ + "/ID").setValue(postId);
 397                         }
 398                         configuration.getStringValue(sonePrefix + "/Likes/Post/" + postLikeCounter + "/ID").setValue(null);
 399
 400                         /* save reply likes. */
 401                         int replyLikeCounter = 0;
 402                         for (String replyId : sone.getLikedReplyIds()) {
 403                                 configuration.getStringValue(sonePrefix + "/Likes/Reply/" + replyLikeCounter++ + "/ID").setValue(replyId);
 404                         }
 405                         configuration.getStringValue(sonePrefix + "/Likes/Reply/" + replyLikeCounter + "/ID").setValue(null);
 406
 407                         /* save albums. first, collect in a flat structure, top-level first. */
 408                         List<Album> albums = FluentIterable.from(sone.getRootAlbum().getAlbums()).transformAndConcat(Album.FLATTENER).toList();
 409
 410                         int albumCounter = 0;
 411                         for (Album album : albums) {
 412                                 String albumPrefix = sonePrefix + "/Albums/" + albumCounter++;
 413                                 configuration.getStringValue(albumPrefix + "/ID").setValue(album.getId());
 414                                 configuration.getStringValue(albumPrefix + "/Title").setValue(album.getTitle());
 415                                 configuration.getStringValue(albumPrefix + "/Description").setValue(album.getDescription());
 416                                 configuration.getStringValue(albumPrefix + "/Parent").setValue(album.getParent().equals(sone.getRootAlbum()) ? null : album.getParent().getId());
 417                                 configuration.getStringValue(albumPrefix + "/AlbumImage").setValue(album.getAlbumImage() == null ? null : album.getAlbumImage().getId());
 418                         }
 419                         configuration.getStringValue(sonePrefix + "/Albums/" + albumCounter + "/ID").setValue(null);
 420
 421                         /* save images. */
 422                         int imageCounter = 0;
 423                         for (Album album : albums) {
 424                                 for (Image image : album.getImages()) {
 425                                         if (!image.isInserted()) {
 426                                                 continue;
 427                                         }
 428                                         String imagePrefix = sonePrefix + "/Images/" + imageCounter++;
 429                                         configuration.getStringValue(imagePrefix + "/ID").setValue(image.getId());
 430                                         configuration.getStringValue(imagePrefix + "/Album").setValue(album.getId());
 431                                         configuration.getStringValue(imagePrefix + "/Key").setValue(image.getKey());
 432                                         configuration.getStringValue(imagePrefix + "/Title").setValue(image.getTitle());
 433                                         configuration.getStringValue(imagePrefix + "/Description").setValue(image.getDescription());
 434                                         configuration.getLongValue(imagePrefix + "/CreationTime").setValue(image.getCreationTime());
 435                                         configuration.getIntValue(imagePrefix + "/Width").setValue(image.getWidth());
 436                                         configuration.getIntValue(imagePrefix + "/Height").setValue(image.getHeight());
 437                                 }
 438                         }
 439                         configuration.getStringValue(sonePrefix + "/Images/" + imageCounter + "/ID").setValue(null);
 440
 441                         /* save options. */
 442                         configuration.getBooleanValue(sonePrefix + "/Options/AutoFollow").setValue(sone.getOptions().isAutoFollow());
 443                         configuration.getBooleanValue(sonePrefix + "/Options/EnableSoneInsertNotifications").setValue(sone.getOptions().isSoneInsertNotificationEnabled());
 444                         configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewSones").setValue(sone.getOptions().isShowNewSoneNotifications());
 445                         configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewPosts").setValue(sone.getOptions().isShowNewPostNotifications());
 446                         configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewReplies").setValue(sone.getOptions().isShowNewReplyNotifications());
 447                         configuration.getStringValue(sonePrefix + "/Options/ShowCustomAvatars").setValue(sone.getOptions().getShowCustomAvatars().name());
 448
 449                         configuration.save();
 450
 451                         logger.log(Level.INFO, String.format("Sone %s saved.", sone));
 452                 } catch (ConfigurationException ce1) {
 453                         logger.log(Level.WARNING, String.format("Could not save Sone: %s", sone), ce1);
 454                 }
 455         }
 456
 457         //
 458         // SERVICE METHODS
 459         //
 460
 461         /** {@inheritDocs} */
 462         @Override
 463         protected void doStart() {
 464                 postDatabase.start();
 465                 memoryBookmarkDatabase.start();
 466                 loadKnownPostReplies();
 467                 notifyStarted();
 468         }
 469
 470         /** {@inheritDocs} */
 471         @Override
 472         protected void doStop() {
 473                 try {
 474                         postDatabase.stop();
 475                         memoryBookmarkDatabase.stop();
 476                         save();
 477                         notifyStopped();
 478                 } catch (DatabaseException de1) {
 479                         notifyFailed(de1);
 480                 }
 481         }
 482
 483         @Override
 484         public SoneBuilder newSoneBuilder() {
 485                 return new MemorySoneBuilder(this);
 486         }
 487
 488         @Override
 489         public void storeSone(Sone sone) {
 490                 lock.writeLock().lock();
 491                 try {
 492                         removeSone(sone);
 493
 494                         allSones.put(sone.getId(), sone);
 495                         storePosts(sone.getId(), sone.getPosts());
 496                         storePostReplies(sone.getId(), sone.getReplies());
 497                         storeAlbums(sone.getId(), toAllAlbums.apply(sone));
 498                         storeImages(sone.getId(), toAllImages.apply(sone));
 499                 } finally {
 500                         lock.writeLock().unlock();
 501                 }
 502         }
 503
 504         private void storePosts(String soneId, Collection<Post> posts) {
 505                 postDatabase.storePosts(soneId, posts);
 506         }
 507
 508         private void storePostReplies(String soneId, Collection<PostReply> postReplies) {
 509                 sonePostReplies.putAll(soneId, postReplies);
 510                 for (PostReply postReply : postReplies) {
 511                         allPostReplies.put(postReply.getId(), postReply);
 512                 }
 513         }
 514
 515         private void storeAlbums(String soneId, Collection<Album> albums) {
 516                 soneAlbums.putAll(soneId, albums);
 517                 for (Album album : albums) {
 518                         allAlbums.put(album.getId(), album);
 519                 }
 520         }
 521
 522         private void storeImages(String soneId, Collection<Image> images) {
 523                 soneImages.putAll(soneId, images);
 524                 for (Image image : images) {
 525                         allImages.put(image.getId(), image);
 526                 }
 527         }
 528
 529         @Override
 530         public void removeSone(Sone sone) {
 531                 lock.writeLock().lock();
 532                 try {
 533                         allSones.remove(sone.getId());
 534                         postDatabase.removePostsFor(sone.getId());
 535                         Collection<PostReply> removedPostReplies =
 536                                         sonePostReplies.removeAll(sone.getId());
 537                         for (PostReply removedPostReply : removedPostReplies) {
 538                                 allPostReplies.remove(removedPostReply.getId());
 539                         }
 540                         Collection<Album> removedAlbums =
 541                                         soneAlbums.removeAll(sone.getId());
 542                         for (Album removedAlbum : removedAlbums) {
 543                                 allAlbums.remove(removedAlbum.getId());
 544                         }
 545                         Collection<Image> removedImages =
 546                                         soneImages.removeAll(sone.getId());
 547                         for (Image removedImage : removedImages) {
 548                                 allImages.remove(removedImage.getId());
 549                         }
 550                 } finally {
 551                         lock.writeLock().unlock();
 552                 }
 553         }
 554
 555         @Override
 556         public Function<String, Optional<Sone>> soneLoader() {
 557                 return new Function<String, Optional<Sone>>() {
 558                         @Override
 559                         public Optional<Sone> apply(String soneId) {
 560                                 return getSone(soneId);
 561                         }
 562                 };
 563         }
 564
 565         @Override
 566         public Optional<Sone> getSone(String soneId) {
 567                 lock.readLock().lock();
 568                 try {
 569                         return fromNullable(allSones.get(soneId));
 570                 } finally {
 571                         lock.readLock().unlock();
 572                 }
 573         }
 574
 575         @Override
 576         public Collection<Sone> getSones() {
 577                 lock.readLock().lock();
 578                 try {
 579                         return new HashSet<Sone>(allSones.values());
 580                 } finally {
 581                         lock.readLock().unlock();
 582                 }
 583         }
 584
 585         @Override
 586         public Collection<Sone> getLocalSones() {
 587                 lock.readLock().lock();
 588                 try {
 589                         return from(allSones.values()).filter(LOCAL_SONE_FILTER).toSet();
 590                 } finally {
 591                         lock.readLock().unlock();
 592                 }
 593         }
 594
 595         @Override
 596         public Collection<Sone> getRemoteSones() {
 597                 lock.readLock().lock();
 598                 try {
 599                         return from(allSones.values())
 600                                         .filter(not(LOCAL_SONE_FILTER)) .toSet();
 601                 } finally {
 602                         lock.readLock().unlock();
 603                 }
 604         }
 605
 606         @Override
 607         public Collection<String> getFriends(Sone localSone) {
 608                 if (!localSone.isLocal()) {
 609                         return Collections.emptySet();
 610                 }
 611                 return memoryFriendDatabase.getFriends(localSone.getId());
 612         }
 613
 614         @Override
 615         public boolean isFriend(Sone localSone, String friendSoneId) {
 616                 if (!localSone.isLocal()) {
 617                         return false;
 618                 }
 619                 return memoryFriendDatabase.isFriend(localSone.getId(), friendSoneId);
 620         }
 621
 622         @Override
 623         public void addFriend(Sone localSone, String friendSoneId) {
 624                 if (!localSone.isLocal()) {
 625                         return;
 626                 }
 627                 memoryFriendDatabase.addFriend(localSone.getId(), friendSoneId);
 628         }
 629
 630         @Override
 631         public void removeFriend(Sone localSone, String friendSoneId) {
 632                 if (!localSone.isLocal()) {
 633                         return;
 634                 }
 635                 memoryFriendDatabase.removeFriend(localSone.getId(), friendSoneId);
 636         }
 637
 638         //
 639         // POSTPROVIDER METHODS
 640         //
 641
 642         /** {@inheritDocs} */
 643         @Override
 644         public Optional<Post> getPost(String postId) {
 645                 return postDatabase.getPost(postId);
 646         }
 647
 648         /** {@inheritDocs} */
 649         @Override
 650         public Collection<Post> getPosts(String soneId) {
 651                 return new HashSet<Post>(getPostsFrom(soneId));
 652         }
 653
 654         /** {@inheritDocs} */
 655         @Override
 656         public Collection<Post> getDirectedPosts(final String recipientId) {
 657                 return postDatabase.getDirectedPosts(recipientId);
 658         }
 659
 660         //
 661         // POSTBUILDERFACTORY METHODS
 662         //
 663
 664         /** {@inheritDocs} */
 665         @Override
 666         public PostBuilder newPostBuilder() {
 667                 return new MemoryPostBuilder(this, soneProvider);
 668         }
 669
 670         //
 671         // POSTSTORE METHODS
 672         //
 673
 674         /** {@inheritDocs} */
 675         @Override
 676         public void storePost(Post post) {
 677                 checkNotNull(post, "post must not be null");
 678                 postDatabase.storePost(post);
 679         }
 680
 681         /** {@inheritDocs} */
 682         @Override
 683         public void removePost(Post post) {
 684                 checkNotNull(post, "post must not be null");
 685                 postDatabase.removePost(post.getId());
 686         }
 687
 688         //
 689         // POSTREPLYPROVIDER METHODS
 690         //
 691
 692         /** {@inheritDocs} */
 693         @Override
 694         public Optional<PostReply> getPostReply(String id) {
 695                 lock.readLock().lock();
 696                 try {
 697                         return fromNullable(allPostReplies.get(id));
 698                 } finally {
 699                         lock.readLock().unlock();
 700                 }
 701         }
 702
 703         /** {@inheritDocs} */
 704         @Override
 705         public List<PostReply> getReplies(final String postId) {
 706                 lock.readLock().lock();
 707                 try {
 708                         return from(allPostReplies.values())
 709                                         .filter(new Predicate<PostReply>() {
 710                                                 @Override
 711                                                 public boolean apply(PostReply postReply) {
 712                                                         return postReply.getPostId().equals(postId);
 713                                                 }
 714                                         }).toSortedList(TIME_COMPARATOR);
 715                 } finally {
 716                         lock.readLock().unlock();
 717                 }
 718         }
 719
 720         //
 721         // POSTREPLYBUILDERFACTORY METHODS
 722         //
 723
 724         /** {@inheritDocs} */
 725         @Override
 726         public PostReplyBuilder newPostReplyBuilder() {
 727                 return new MemoryPostReplyBuilder(this, soneProvider);
 728         }
 729
 730         //
 731         // POSTREPLYSTORE METHODS
 732         //
 733
 734         /** {@inheritDocs} */
 735         @Override
 736         public void storePostReply(PostReply postReply) {
 737                 lock.writeLock().lock();
 738                 try {
 739                         allPostReplies.put(postReply.getId(), postReply);
 740                 } finally {
 741                         lock.writeLock().unlock();
 742                 }
 743         }
 744
 745         /** {@inheritDocs} */
 746         @Override
 747         public void removePostReply(PostReply postReply) {
 748                 lock.writeLock().lock();
 749                 try {
 750                         allPostReplies.remove(postReply.getId());
 751                 } finally {
 752                         lock.writeLock().unlock();
 753                 }
 754         }
 755
 756         //
 757         // ALBUMPROVDER METHODS
 758         //
 759
 760         @Override
 761         public Optional<Album> getAlbum(String albumId) {
 762                 lock.readLock().lock();
 763                 try {
 764                         return fromNullable(allAlbums.get(albumId));
 765                 } finally {
 766                         lock.readLock().unlock();
 767                 }
 768         }
 769
 770         //
 771         // ALBUMBUILDERFACTORY METHODS
 772         //
 773
 774         @Override
 775         public AlbumBuilder newAlbumBuilder() {
 776                 return new AlbumBuilderImpl();
 777         }
 778
 779         //
 780         // ALBUMSTORE METHODS
 781         //
 782
 783         @Override
 784         public void storeAlbum(Album album) {
 785                 lock.writeLock().lock();
 786                 try {
 787                         allAlbums.put(album.getId(), album);
 788                         soneAlbums.put(album.getSone().getId(), album);
 789                 } finally {
 790                         lock.writeLock().unlock();
 791                 }
 792         }
 793
 794         @Override
 795         public void removeAlbum(Album album) {
 796                 lock.writeLock().lock();
 797                 try {
 798                         allAlbums.remove(album.getId());
 799                         soneAlbums.remove(album.getSone().getId(), album);
 800                 } finally {
 801                         lock.writeLock().unlock();
 802                 }
 803         }
 804
 805         //
 806         // IMAGEPROVIDER METHODS
 807         //
 808
 809         @Override
 810         public Optional<Image> getImage(String imageId) {
 811                 lock.readLock().lock();
 812                 try {
 813                         return fromNullable(allImages.get(imageId));
 814                 } finally {
 815                         lock.readLock().unlock();
 816                 }
 817         }
 818
 819         //
 820         // IMAGEBUILDERFACTORY METHODS
 821         //
 822
 823         @Override
 824         public ImageBuilder newImageBuilder() {
 825                 return new ImageBuilderImpl();
 826         }
 827
 828         //
 829         // IMAGESTORE METHODS
 830         //
 831
 832         @Override
 833         public void storeImage(Image image) {
 834                 lock.writeLock().lock();
 835                 try {
 836                         allImages.put(image.getId(), image);
 837                         soneImages.put(image.getSone().getId(), image);
 838                 } finally {
 839                         lock.writeLock().unlock();
 840                 }
 841         }
 842
 843         @Override
 844         public void removeImage(Image image) {
 845                 lock.writeLock().lock();
 846                 try {
 847                         allImages.remove(image.getId());
 848                         soneImages.remove(image.getSone().getId(), image);
 849                 } finally {
 850                         lock.writeLock().unlock();
 851                 }
 852         }
 853
 854         @Override
 855         public void bookmarkPost(Post post) {
 856                 memoryBookmarkDatabase.bookmarkPost(post);
 857         }
 858
 859         @Override
 860         public void unbookmarkPost(Post post) {
 861                 memoryBookmarkDatabase.unbookmarkPost(post);
 862         }
 863
 864         @Override
 865         public boolean isPostBookmarked(Post post) {
 866                 return memoryBookmarkDatabase.isPostBookmarked(post);
 867         }
 868
 869         @Override
 870         public Set<Post> getBookmarkedPosts() {
 871                 return memoryBookmarkDatabase.getBookmarkedPosts();
 872         }
 873
 874         //
 875         // PACKAGE-PRIVATE METHODS
 876         //
 877
 878         /**
 879          * Returns whether the given post is known.
 880          *
 881          * @param post
 882          *              The post
 883          * @return {@code true} if the post is known, {@code false} otherwise
 884          */
 885         boolean isPostKnown(Post post) {
 886                 return postDatabase.isPostKnown(post.getId());
 887         }
 888
 889         /**
 890          * Sets whether the given post is known.
 891          *
 892          * @param post
 893          *              The post
 894          * @param known
 895          *              {@code true} if the post is known, {@code false} otherwise
 896          */
 897         void setPostKnown(Post post, boolean known) {
 898                 postDatabase.setPostKnown(post.getId(), known);
 899         }
 900
 901         /**
 902          * Returns whether the given post reply is known.
 903          *
 904          * @param postReply
 905          *              The post reply
 906          * @return {@code true} if the given post reply is known, {@code false}
 907          *         otherwise
 908          */
 909         boolean isPostReplyKnown(PostReply postReply) {
 910                 lock.readLock().lock();
 911                 try {
 912                         return knownPostReplies.contains(postReply.getId());
 913                 } finally {
 914                         lock.readLock().unlock();
 915                 }
 916         }
 917
 918         /**
 919          * Sets whether the given post reply is known.
 920          *
 921          * @param postReply
 922          *              The post reply
 923          * @param known
 924          *              {@code true} if the post reply is known, {@code false} otherwise
 925          */
 926         void setPostReplyKnown(PostReply postReply, boolean known) {
 927                 lock.writeLock().lock();
 928                 try {
 929                         if (known) {
 930                                 knownPostReplies.add(postReply.getId());
 931                         } else {
 932                                 knownPostReplies.remove(postReply.getId());
 933                         }
 934                 } finally {
 935                         lock.writeLock().unlock();
 936                 }
 937         }
 938
 939         //
 940         // PRIVATE METHODS
 941         //
 942
 943         /**
 944          * Gets all posts for the given Sone, creating a new collection if there is
 945          * none yet.
 946          *
 947          * @param soneId
 948          *              The ID of the Sone to get the posts for
 949          * @return All posts
 950          */
 951         private Collection<Post> getPostsFrom(String soneId) {
 952                 return postDatabase.getPostsFrom(soneId);
 953         }
 954
 955         /** Loads the known post replies. */
 956         private void loadKnownPostReplies() {
 957                 Set<String> knownPostReplies = configurationLoader.loadKnownPostReplies();
 958                 lock.writeLock().lock();
 959                 try {
 960                         this.knownPostReplies.clear();
 961                         this.knownPostReplies.addAll(knownPostReplies);
 962                 } finally {
 963                         lock.writeLock().unlock();
 964                 }
 965         }
 966
 967         /**
 968          * Saves the known post replies to the configuration.
 969          *
 970          * @throws DatabaseException
 971          *              if a configuration error occurs
 972          */
 973         private void saveKnownPostReplies() throws DatabaseException {
 974                 lock.readLock().lock();
 975                 try {
 976                         int replyCounter = 0;
 977                         for (String knownReplyId : knownPostReplies) {
 978                                 configuration.getStringValue("KnownReplies/" + replyCounter++ + "/ID").setValue(
 979                                                 knownReplyId);
 980                         }
 981                         configuration.getStringValue("KnownReplies/" + replyCounter + "/ID").setValue(null);
 982                 } catch (ConfigurationException ce1) {
 983                         throw new DatabaseException("Could not save database.", ce1);
 984                 } finally {
 985                         lock.readLock().unlock();
 986                 }
 987         }
 988
 989 }