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 MemorySoneDatabase soneDatabase;
 136         private final MemoryPostDatabase postDatabase;
 137         private final MemoryBookmarkDatabase memoryBookmarkDatabase;
 138         private final MemoryFriendDatabase memoryFriendDatabase;
 139
 140         /**
 141          * Creates a new memory database.
 142          *
 143          * @param soneProvider
 144          *              The Sone provider
 145          * @param configuration
 146          *              The configuration for loading and saving elements
 147          */
 148         @Inject
 149         public MemoryDatabase(SoneProvider soneProvider, Configuration configuration) {
 150                 this.soneProvider = soneProvider;
 151                 this.configuration = configuration;
 152                 this.configurationLoader = new ConfigurationLoader(configuration);
 153                 soneDatabase = new MemorySoneDatabase(configurationLoader);
 154                 postDatabase = new MemoryPostDatabase(this, configurationLoader);
 155                 memoryBookmarkDatabase =
 156                                 new MemoryBookmarkDatabase(this, configurationLoader);
 157                 memoryFriendDatabase = new MemoryFriendDatabase(configurationLoader);
 158         }
 159
 160         //
 161         // DATABASE METHODS
 162         //
 163
 164         @Override
 165         public Optional<LocalSone> getLocalSone(String localSoneId) {
 166                 lock.readLock().lock();
 167                 try {
 168                         if (!localSones.contains(localSoneId)) {
 169                                 return Optional.absent();
 170                         }
 171                         return Optional.of((LocalSone) allSones.get(localSoneId));
 172                 } finally {
 173                         lock.readLock().unlock();
 174                 }
 175         }
 176
 177         @Override
 178         public LocalSone registerLocalSone(OwnIdentity ownIdentity) {
 179                 final LocalSone localSone = loadLocalSone(ownIdentity);
 180                 localSones.add(ownIdentity.getId());
 181                 return localSone;
 182         }
 183
 184         private LocalSone loadLocalSone(OwnIdentity ownIdentity) {
 185                 LocalSone localSone = (LocalSone) newSoneBuilder().local().from(ownIdentity).build();
 186                 localSone.setLatestEdition(
 187                                 Optional.fromNullable(
 188                                                 Longs.tryParse(ownIdentity.getProperty(LATEST_EDITION_PROPERTY)))
 189                                 .or(0L));
 190                 localSone.setClient(new Client("Sone", SonePlugin.VERSION.toString()));
 191                 localSone.setKnown(true);
 192
 193                 loadSone(localSone);
 194                 return localSone;
 195         }
 196
 197         public void loadSone(LocalSone sone) {
 198                 long soneTime = configurationLoader.getLocalSoneTime(sone.getId());
 199                 if (soneTime == -1) {
 200                         return;
 201                 }
 202
 203                 /* load profile. */
 204                 ConfigurationSoneParser configurationSoneParser = new ConfigurationSoneParser(configuration, sone);
 205                 Profile profile = configurationSoneParser.parseProfile();
 206
 207                 /* load posts. */
 208                 Collection<Post> posts;
 209                 try {
 210                         posts = configurationSoneParser.parsePosts(this);
 211                 } catch (InvalidPostFound ipf) {
 212                         logger.log(Level.WARNING, "Invalid post found, aborting load!");
 213                         return;
 214                 }
 215
 216                 /* load replies. */
 217                 Collection<PostReply> postReplies;
 218                 try {
 219                         postReplies = configurationSoneParser.parsePostReplies(this);
 220                 } catch (InvalidPostReplyFound iprf) {
 221                         logger.log(Level.WARNING, "Invalid reply found, aborting load!");
 222                         return;
 223                 }
 224
 225                 /* load post likes. */
 226                 Set<String> likedPostIds = configurationSoneParser.parseLikedPostIds();
 227
 228                 /* load reply likes. */
 229                 Set<String> likedReplyIds = configurationSoneParser.parseLikedPostReplyIds();
 230
 231                 /* load albums. */
 232                 List<Album> topLevelAlbums;
 233                 try {
 234                         topLevelAlbums = configurationSoneParser.parseTopLevelAlbums(this);
 235                 } catch (InvalidAlbumFound iaf) {
 236                         logger.log(Level.WARNING, "Invalid album found, aborting load!");
 237                         return;
 238                 } catch (InvalidParentAlbumFound ipaf) {
 239                         logger.log(Level.WARNING,
 240                                         format("Invalid parent album ID: %s", ipaf.getAlbumParentId()));
 241                         return;
 242                 }
 243
 244                 /* load images. */
 245                 try {
 246                         configurationSoneParser.parseImages(this);
 247                 } catch (InvalidImageFound iif) {
 248                         logger.log(WARNING, "Invalid image found, aborting load!");
 249                         return;
 250                 } catch (InvalidParentAlbumFound ipaf) {
 251                         logger.log(Level.WARNING,
 252                                         format("Invalid album image (%s) encountered, aborting load!",
 253                                                         ipaf.getAlbumParentId()));
 254                         return;
 255                 }
 256
 257                 /* load avatar. */
 258                 String sonePrefix = "Sone/" + sone.getId();
 259                 String avatarId = configuration.getStringValue(sonePrefix + "/Profile/Avatar").getValue(null);
 260                 if (avatarId != null) {
 261                         final Map<String, Image> images = configurationSoneParser.getImages();
 262                         profile.setAvatar(images.get(avatarId));
 263                 }
 264
 265                 /* load options. */
 266                 sone.getOptions().setAutoFollow(configuration.getBooleanValue(sonePrefix + "/Options/AutoFollow").getValue(null));
 267                 sone.getOptions().setSoneInsertNotificationEnabled(configuration.getBooleanValue(sonePrefix + "/Options/EnableSoneInsertNotifications").getValue(null));
 268                 sone.getOptions().setShowNewSoneNotifications(configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewSones").getValue(null));
 269                 sone.getOptions().setShowNewPostNotifications(configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewPosts").getValue(null));
 270                 sone.getOptions().setShowNewReplyNotifications(configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewReplies").getValue(null));
 271                 sone.getOptions().setShowCustomAvatars(ShowCustomAvatars.valueOf(
 272                                 configuration.getStringValue(sonePrefix + "/Options/ShowCustomAvatars")
 273                                                 .getValue(ShowCustomAvatars.NEVER.name())));
 274
 275                 /* if we’re still here, Sone was loaded successfully. */
 276                 lock.writeLock().lock();
 277                 try {
 278                         sone.setTime(soneTime);
 279                         sone.setProfile(profile);
 280                         sone.setLikePostIds(likedPostIds);
 281                         sone.setLikeReplyIds(likedReplyIds);
 282
 283                         String lastInsertFingerprint = configurationLoader.getLastInsertFingerprint(sone.getId());
 284                         lastInsertFingerprints.put(sone.getId(), lastInsertFingerprint);
 285
 286                         allSones.put(sone.getId(), sone);
 287                         storePosts(sone.getId(), posts);
 288                         storePostReplies(sone.getId(), postReplies);
 289                         storeAlbums(sone.getId(), topLevelAlbums);
 290                         storeImages(sone.getId(), from(topLevelAlbums).transformAndConcat(Album.FLATTENER).transformAndConcat(Album.IMAGES).toList());
 291                 } finally {
 292                         lock.writeLock().unlock();
 293                 }
 294                 for (Post post : posts) {
 295                         post.setKnown(true);
 296                 }
 297                 for (PostReply reply : postReplies) {
 298                         reply.setKnown(true);
 299                 }
 300
 301                 logger.info(String.format("Sone loaded successfully: %s", sone));
 302         }
 303
 304         @Override
 305         public String getLastInsertFingerprint(Sone sone) {
 306                 lock.readLock().lock();
 307                 try {
 308                         if (!lastInsertFingerprints.containsKey(sone.getId())) {
 309                                 return "";
 310                         }
 311                         return lastInsertFingerprints.get(sone.getId());
 312                 } finally {
 313                         lock.readLock().unlock();
 314                 }
 315         }
 316
 317         @Override
 318         public void setLastInsertFingerprint(Sone sone, String lastInsertFingerprint) {
 319                 lock.writeLock().lock();
 320                 try {
 321                         lastInsertFingerprints.put(sone.getId(), lastInsertFingerprint);
 322                 } finally {
 323                         lock.writeLock().unlock();
 324                 }
 325         }
 326
 327         /**
 328          * Saves the database.
 329          *
 330          * @throws DatabaseException
 331          *              if an error occurs while saving
 332          */
 333         @Override
 334         public void save() throws DatabaseException {
 335                 lock.writeLock().lock();
 336                 try {
 337                         saveKnownPostReplies();
 338                         for (Sone localSone : from(localSones).transform(soneLoader()).transform(Optionals.<Sone>get())) {
 339                                 saveSone(localSone);
 340                         }
 341                 } finally {
 342                         lock.writeLock().unlock();
 343                 }
 344         }
 345
 346         private synchronized void saveSone(Sone sone) {
 347                 logger.log(Level.INFO, String.format("Saving Sone: %s", sone));
 348                 try {
 349                         /* save Sone into configuration. */
 350                         String sonePrefix = "Sone/" + sone.getId();
 351                         configuration.getLongValue(sonePrefix + "/Time").setValue(sone.getTime());
 352                         configuration.getStringValue(sonePrefix + "/LastInsertFingerprint").setValue(lastInsertFingerprints.get(sone.getId()));
 353
 354                         /* save profile. */
 355                         Profile profile = sone.getProfile();
 356                         configuration.getStringValue(sonePrefix + "/Profile/FirstName").setValue(profile.getFirstName());
 357                         configuration.getStringValue(sonePrefix + "/Profile/MiddleName").setValue(profile.getMiddleName());
 358                         configuration.getStringValue(sonePrefix + "/Profile/LastName").setValue(profile.getLastName());
 359                         configuration.getIntValue(sonePrefix + "/Profile/BirthDay").setValue(profile.getBirthDay());
 360                         configuration.getIntValue(sonePrefix + "/Profile/BirthMonth").setValue(profile.getBirthMonth());
 361                         configuration.getIntValue(sonePrefix + "/Profile/BirthYear").setValue(profile.getBirthYear());
 362                         configuration.getStringValue(sonePrefix + "/Profile/Avatar").setValue(profile.getAvatar());
 363
 364                         /* save profile fields. */
 365                         int fieldCounter = 0;
 366                         for (Field profileField : profile.getFields()) {
 367                                 String fieldPrefix = sonePrefix + "/Profile/Fields/" + fieldCounter++;
 368                                 configuration.getStringValue(fieldPrefix + "/Name").setValue(profileField.getName());
 369                                 configuration.getStringValue(fieldPrefix + "/Value").setValue(profileField.getValue());
 370                         }
 371                         configuration.getStringValue(sonePrefix + "/Profile/Fields/" + fieldCounter + "/Name").setValue(null);
 372
 373                         /* save posts. */
 374                         int postCounter = 0;
 375                         for (Post post : sone.getPosts()) {
 376                                 String postPrefix = sonePrefix + "/Posts/" + postCounter++;
 377                                 configuration.getStringValue(postPrefix + "/ID").setValue(post.getId());
 378                                 configuration.getStringValue(postPrefix + "/Recipient").setValue(post.getRecipientId().orNull());
 379                                 configuration.getLongValue(postPrefix + "/Time").setValue(post.getTime());
 380                                 configuration.getStringValue(postPrefix + "/Text").setValue(post.getText());
 381                         }
 382                         configuration.getStringValue(sonePrefix + "/Posts/" + postCounter + "/ID").setValue(null);
 383
 384                         /* save replies. */
 385                         int replyCounter = 0;
 386                         for (PostReply reply : sone.getReplies()) {
 387                                 String replyPrefix = sonePrefix + "/Replies/" + replyCounter++;
 388                                 configuration.getStringValue(replyPrefix + "/ID").setValue(reply.getId());
 389                                 configuration.getStringValue(replyPrefix + "/Post/ID").setValue(reply.getPostId());
 390                                 configuration.getLongValue(replyPrefix + "/Time").setValue(reply.getTime());
 391                                 configuration.getStringValue(replyPrefix + "/Text").setValue(reply.getText());
 392                         }
 393                         configuration.getStringValue(sonePrefix + "/Replies/" + replyCounter + "/ID").setValue(null);
 394
 395                         /* save post likes. */
 396                         int postLikeCounter = 0;
 397                         for (String postId : sone.getLikedPostIds()) {
 398                                 configuration.getStringValue(sonePrefix + "/Likes/Post/" + postLikeCounter++ + "/ID").setValue(postId);
 399                         }
 400                         configuration.getStringValue(sonePrefix + "/Likes/Post/" + postLikeCounter + "/ID").setValue(null);
 401
 402                         /* save reply likes. */
 403                         int replyLikeCounter = 0;
 404                         for (String replyId : sone.getLikedReplyIds()) {
 405                                 configuration.getStringValue(sonePrefix + "/Likes/Reply/" + replyLikeCounter++ + "/ID").setValue(replyId);
 406                         }
 407                         configuration.getStringValue(sonePrefix + "/Likes/Reply/" + replyLikeCounter + "/ID").setValue(null);
 408
 409                         /* save albums. first, collect in a flat structure, top-level first. */
 410                         List<Album> albums = FluentIterable.from(sone.getRootAlbum().getAlbums()).transformAndConcat(Album.FLATTENER).toList();
 411
 412                         int albumCounter = 0;
 413                         for (Album album : albums) {
 414                                 String albumPrefix = sonePrefix + "/Albums/" + albumCounter++;
 415                                 configuration.getStringValue(albumPrefix + "/ID").setValue(album.getId());
 416                                 configuration.getStringValue(albumPrefix + "/Title").setValue(album.getTitle());
 417                                 configuration.getStringValue(albumPrefix + "/Description").setValue(album.getDescription());
 418                                 configuration.getStringValue(albumPrefix + "/Parent").setValue(album.getParent().equals(sone.getRootAlbum()) ? null : album.getParent().getId());
 419                                 configuration.getStringValue(albumPrefix + "/AlbumImage").setValue(album.getAlbumImage() == null ? null : album.getAlbumImage().getId());
 420                         }
 421                         configuration.getStringValue(sonePrefix + "/Albums/" + albumCounter + "/ID").setValue(null);
 422
 423                         /* save images. */
 424                         int imageCounter = 0;
 425                         for (Album album : albums) {
 426                                 for (Image image : album.getImages()) {
 427                                         if (!image.isInserted()) {
 428                                                 continue;
 429                                         }
 430                                         String imagePrefix = sonePrefix + "/Images/" + imageCounter++;
 431                                         configuration.getStringValue(imagePrefix + "/ID").setValue(image.getId());
 432                                         configuration.getStringValue(imagePrefix + "/Album").setValue(album.getId());
 433                                         configuration.getStringValue(imagePrefix + "/Key").setValue(image.getKey());
 434                                         configuration.getStringValue(imagePrefix + "/Title").setValue(image.getTitle());
 435                                         configuration.getStringValue(imagePrefix + "/Description").setValue(image.getDescription());
 436                                         configuration.getLongValue(imagePrefix + "/CreationTime").setValue(image.getCreationTime());
 437                                         configuration.getIntValue(imagePrefix + "/Width").setValue(image.getWidth());
 438                                         configuration.getIntValue(imagePrefix + "/Height").setValue(image.getHeight());
 439                                 }
 440                         }
 441                         configuration.getStringValue(sonePrefix + "/Images/" + imageCounter + "/ID").setValue(null);
 442
 443                         /* save options. */
 444                         configuration.getBooleanValue(sonePrefix + "/Options/AutoFollow").setValue(sone.getOptions().isAutoFollow());
 445                         configuration.getBooleanValue(sonePrefix + "/Options/EnableSoneInsertNotifications").setValue(sone.getOptions().isSoneInsertNotificationEnabled());
 446                         configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewSones").setValue(sone.getOptions().isShowNewSoneNotifications());
 447                         configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewPosts").setValue(sone.getOptions().isShowNewPostNotifications());
 448                         configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewReplies").setValue(sone.getOptions().isShowNewReplyNotifications());
 449                         configuration.getStringValue(sonePrefix + "/Options/ShowCustomAvatars").setValue(sone.getOptions().getShowCustomAvatars().name());
 450
 451                         configuration.save();
 452
 453                         logger.log(Level.INFO, String.format("Sone %s saved.", sone));
 454                 } catch (ConfigurationException ce1) {
 455                         logger.log(Level.WARNING, String.format("Could not save Sone: %s", sone), ce1);
 456                 }
 457         }
 458
 459         //
 460         // SERVICE METHODS
 461         //
 462
 463         /** {@inheritDocs} */
 464         @Override
 465         protected void doStart() {
 466                 soneDatabase.start();
 467                 memoryFriendDatabase.start();
 468                 postDatabase.start();
 469                 memoryBookmarkDatabase.start();
 470                 loadKnownPostReplies();
 471                 notifyStarted();
 472         }
 473
 474         /** {@inheritDocs} */
 475         @Override
 476         protected void doStop() {
 477                 try {
 478                         soneDatabase.stop();
 479                         memoryFriendDatabase.stop();
 480                         postDatabase.stop();
 481                         memoryBookmarkDatabase.stop();
 482                         save();
 483                         notifyStopped();
 484                 } catch (DatabaseException de1) {
 485                         notifyFailed(de1);
 486                 }
 487         }
 488
 489         @Override
 490         public SoneBuilder newSoneBuilder() {
 491                 return new MemorySoneBuilder(this);
 492         }
 493
 494         @Override
 495         public void storeSone(Sone sone) {
 496                 lock.writeLock().lock();
 497                 try {
 498                         removeSone(sone);
 499
 500                         allSones.put(sone.getId(), sone);
 501                         storePosts(sone.getId(), sone.getPosts());
 502                         storePostReplies(sone.getId(), sone.getReplies());
 503                         storeAlbums(sone.getId(), toAllAlbums.apply(sone));
 504                         storeImages(sone.getId(), toAllImages.apply(sone));
 505                 } finally {
 506                         lock.writeLock().unlock();
 507                 }
 508         }
 509
 510         @Override
 511         public boolean isSoneKnown(Sone sone) {
 512                 return soneDatabase.isKnownSone(sone.getId());
 513         }
 514
 515         @Override
 516         public void setSoneKnown(Sone sone) {
 517                 soneDatabase.setSoneKnown(sone.getId());
 518         }
 519
 520         private void storePosts(String soneId, Collection<Post> posts) {
 521                 postDatabase.storePosts(soneId, posts);
 522         }
 523
 524         private void storePostReplies(String soneId, Collection<PostReply> postReplies) {
 525                 sonePostReplies.putAll(soneId, postReplies);
 526                 for (PostReply postReply : postReplies) {
 527                         allPostReplies.put(postReply.getId(), postReply);
 528                 }
 529         }
 530
 531         private void storeAlbums(String soneId, Collection<Album> albums) {
 532                 soneAlbums.putAll(soneId, albums);
 533                 for (Album album : albums) {
 534                         allAlbums.put(album.getId(), album);
 535                 }
 536         }
 537
 538         private void storeImages(String soneId, Collection<Image> images) {
 539                 soneImages.putAll(soneId, images);
 540                 for (Image image : images) {
 541                         allImages.put(image.getId(), image);
 542                 }
 543         }
 544
 545         @Override
 546         public void removeSone(Sone sone) {
 547                 lock.writeLock().lock();
 548                 try {
 549                         allSones.remove(sone.getId());
 550                         postDatabase.removePostsFor(sone.getId());
 551                         Collection<PostReply> removedPostReplies =
 552                                         sonePostReplies.removeAll(sone.getId());
 553                         for (PostReply removedPostReply : removedPostReplies) {
 554                                 allPostReplies.remove(removedPostReply.getId());
 555                         }
 556                         Collection<Album> removedAlbums =
 557                                         soneAlbums.removeAll(sone.getId());
 558                         for (Album removedAlbum : removedAlbums) {
 559                                 allAlbums.remove(removedAlbum.getId());
 560                         }
 561                         Collection<Image> removedImages =
 562                                         soneImages.removeAll(sone.getId());
 563                         for (Image removedImage : removedImages) {
 564                                 allImages.remove(removedImage.getId());
 565                         }
 566                 } finally {
 567                         lock.writeLock().unlock();
 568                 }
 569         }
 570
 571         @Override
 572         public Function<String, Optional<Sone>> soneLoader() {
 573                 return new Function<String, Optional<Sone>>() {
 574                         @Override
 575                         public Optional<Sone> apply(String soneId) {
 576                                 return getSone(soneId);
 577                         }
 578                 };
 579         }
 580
 581         @Override
 582         public Optional<Sone> getSone(String soneId) {
 583                 lock.readLock().lock();
 584                 try {
 585                         return fromNullable(allSones.get(soneId));
 586                 } finally {
 587                         lock.readLock().unlock();
 588                 }
 589         }
 590
 591         @Override
 592         public Collection<Sone> getSones() {
 593                 lock.readLock().lock();
 594                 try {
 595                         return new HashSet<Sone>(allSones.values());
 596                 } finally {
 597                         lock.readLock().unlock();
 598                 }
 599         }
 600
 601         @Override
 602         public Collection<LocalSone> getLocalSones() {
 603                 lock.readLock().lock();
 604                 try {
 605                         return from(allSones.values()).filter(LOCAL_SONE_FILTER).transform(new Function<Sone, LocalSone>() {
 606                                 @Override
 607                                 public LocalSone apply(Sone sone) {
 608                                         // FIXME – Sones will not always implement LocalSone
 609                                         return (LocalSone) sone;
 610                                 }
 611                         }).toSet();
 612                 } finally {
 613                         lock.readLock().unlock();
 614                 }
 615         }
 616
 617         @Override
 618         public Collection<Sone> getRemoteSones() {
 619                 lock.readLock().lock();
 620                 try {
 621                         return from(allSones.values())
 622                                         .filter(not(LOCAL_SONE_FILTER)) .toSet();
 623                 } finally {
 624                         lock.readLock().unlock();
 625                 }
 626         }
 627
 628         @Override
 629         public Collection<String> getFriends(LocalSone localSone) {
 630                 if (!localSone.isLocal()) {
 631                         return Collections.emptySet();
 632                 }
 633                 return memoryFriendDatabase.getFriends(localSone.getId());
 634         }
 635
 636         @Override
 637         public Optional<Long> getSoneFollowingTime(String remoteSoneId) {
 638                 return memoryFriendDatabase.getSoneFollowingTime(remoteSoneId);
 639         }
 640
 641         @Override
 642         public boolean isFriend(LocalSone localSone, String friendSoneId) {
 643                 if (!localSone.isLocal()) {
 644                         return false;
 645                 }
 646                 return memoryFriendDatabase.isFriend(localSone.getId(), friendSoneId);
 647         }
 648
 649         @Override
 650         public void addFriend(LocalSone localSone, String friendSoneId) {
 651                 memoryFriendDatabase.addFriend(localSone.getId(), friendSoneId);
 652         }
 653
 654         @Override
 655         public void removeFriend(LocalSone localSone, String friendSoneId) {
 656                 memoryFriendDatabase.removeFriend(localSone.getId(), friendSoneId);
 657         }
 658
 659         //
 660         // POSTPROVIDER METHODS
 661         //
 662
 663         /** {@inheritDocs} */
 664         @Override
 665         public Optional<Post> getPost(String postId) {
 666                 return postDatabase.getPost(postId);
 667         }
 668
 669         /** {@inheritDocs} */
 670         @Override
 671         public Collection<Post> getPosts(String soneId) {
 672                 return new HashSet<Post>(getPostsFrom(soneId));
 673         }
 674
 675         /** {@inheritDocs} */
 676         @Override
 677         public Collection<Post> getDirectedPosts(final String recipientId) {
 678                 return postDatabase.getDirectedPosts(recipientId);
 679         }
 680
 681         //
 682         // POSTBUILDERFACTORY METHODS
 683         //
 684
 685         /** {@inheritDocs} */
 686         @Override
 687         public PostBuilder newPostBuilder() {
 688                 return new MemoryPostBuilder(this, soneProvider);
 689         }
 690
 691         //
 692         // POSTSTORE METHODS
 693         //
 694
 695         /** {@inheritDocs} */
 696         @Override
 697         public void storePost(Post post) {
 698                 checkNotNull(post, "post must not be null");
 699                 postDatabase.storePost(post);
 700         }
 701
 702         /** {@inheritDocs} */
 703         @Override
 704         public void removePost(Post post) {
 705                 checkNotNull(post, "post must not be null");
 706                 postDatabase.removePost(post.getId());
 707         }
 708
 709         //
 710         // POSTREPLYPROVIDER METHODS
 711         //
 712
 713         /** {@inheritDocs} */
 714         @Override
 715         public Optional<PostReply> getPostReply(String id) {
 716                 lock.readLock().lock();
 717                 try {
 718                         return fromNullable(allPostReplies.get(id));
 719                 } finally {
 720                         lock.readLock().unlock();
 721                 }
 722         }
 723
 724         /** {@inheritDocs} */
 725         @Override
 726         public List<PostReply> getReplies(final String postId) {
 727                 lock.readLock().lock();
 728                 try {
 729                         return from(allPostReplies.values())
 730                                         .filter(new Predicate<PostReply>() {
 731                                                 @Override
 732                                                 public boolean apply(PostReply postReply) {
 733                                                         return postReply.getPostId().equals(postId);
 734                                                 }
 735                                         }).toSortedList(TIME_COMPARATOR);
 736                 } finally {
 737                         lock.readLock().unlock();
 738                 }
 739         }
 740
 741         //
 742         // POSTREPLYBUILDERFACTORY METHODS
 743         //
 744
 745         /** {@inheritDocs} */
 746         @Override
 747         public PostReplyBuilder newPostReplyBuilder() {
 748                 return new MemoryPostReplyBuilder(this, soneProvider);
 749         }
 750
 751         //
 752         // POSTREPLYSTORE METHODS
 753         //
 754
 755         /** {@inheritDocs} */
 756         @Override
 757         public void storePostReply(PostReply postReply) {
 758                 lock.writeLock().lock();
 759                 try {
 760                         allPostReplies.put(postReply.getId(), postReply);
 761                 } finally {
 762                         lock.writeLock().unlock();
 763                 }
 764         }
 765
 766         /** {@inheritDocs} */
 767         @Override
 768         public void removePostReply(PostReply postReply) {
 769                 lock.writeLock().lock();
 770                 try {
 771                         allPostReplies.remove(postReply.getId());
 772                 } finally {
 773                         lock.writeLock().unlock();
 774                 }
 775         }
 776
 777         //
 778         // ALBUMPROVDER METHODS
 779         //
 780
 781         @Override
 782         public Optional<Album> getAlbum(String albumId) {
 783                 lock.readLock().lock();
 784                 try {
 785                         return fromNullable(allAlbums.get(albumId));
 786                 } finally {
 787                         lock.readLock().unlock();
 788                 }
 789         }
 790
 791         //
 792         // ALBUMBUILDERFACTORY METHODS
 793         //
 794
 795         @Override
 796         public AlbumBuilder newAlbumBuilder() {
 797                 return new AlbumBuilderImpl();
 798         }
 799
 800         //
 801         // ALBUMSTORE METHODS
 802         //
 803
 804         @Override
 805         public void storeAlbum(Album album) {
 806                 lock.writeLock().lock();
 807                 try {
 808                         allAlbums.put(album.getId(), album);
 809                         soneAlbums.put(album.getSone().getId(), album);
 810                 } finally {
 811                         lock.writeLock().unlock();
 812                 }
 813         }
 814
 815         @Override
 816         public void removeAlbum(Album album) {
 817                 lock.writeLock().lock();
 818                 try {
 819                         allAlbums.remove(album.getId());
 820                         soneAlbums.remove(album.getSone().getId(), album);
 821                 } finally {
 822                         lock.writeLock().unlock();
 823                 }
 824         }
 825
 826         //
 827         // IMAGEPROVIDER METHODS
 828         //
 829
 830         @Override
 831         public Optional<Image> getImage(String imageId) {
 832                 lock.readLock().lock();
 833                 try {
 834                         return fromNullable(allImages.get(imageId));
 835                 } finally {
 836                         lock.readLock().unlock();
 837                 }
 838         }
 839
 840         //
 841         // IMAGEBUILDERFACTORY METHODS
 842         //
 843
 844         @Override
 845         public ImageBuilder newImageBuilder() {
 846                 return new ImageBuilderImpl();
 847         }
 848
 849         //
 850         // IMAGESTORE METHODS
 851         //
 852
 853         @Override
 854         public void storeImage(Image image) {
 855                 lock.writeLock().lock();
 856                 try {
 857                         allImages.put(image.getId(), image);
 858                         soneImages.put(image.getSone().getId(), image);
 859                 } finally {
 860                         lock.writeLock().unlock();
 861                 }
 862         }
 863
 864         @Override
 865         public void removeImage(Image image) {
 866                 lock.writeLock().lock();
 867                 try {
 868                         allImages.remove(image.getId());
 869                         soneImages.remove(image.getSone().getId(), image);
 870                 } finally {
 871                         lock.writeLock().unlock();
 872                 }
 873         }
 874
 875         @Override
 876         public void bookmarkPost(Post post) {
 877                 memoryBookmarkDatabase.bookmarkPost(post);
 878         }
 879
 880         @Override
 881         public void unbookmarkPost(Post post) {
 882                 memoryBookmarkDatabase.unbookmarkPost(post);
 883         }
 884
 885         @Override
 886         public boolean isPostBookmarked(Post post) {
 887                 return memoryBookmarkDatabase.isPostBookmarked(post);
 888         }
 889
 890         @Override
 891         public Set<Post> getBookmarkedPosts() {
 892                 return memoryBookmarkDatabase.getBookmarkedPosts();
 893         }
 894
 895         //
 896         // PACKAGE-PRIVATE METHODS
 897         //
 898
 899         /**
 900          * Returns whether the given post is known.
 901          *
 902          * @param post
 903          *              The post
 904          * @return {@code true} if the post is known, {@code false} otherwise
 905          */
 906         boolean isPostKnown(Post post) {
 907                 return postDatabase.isPostKnown(post.getId());
 908         }
 909
 910         /**
 911          * Sets whether the given post is known.
 912          *
 913          * @param post
 914          *              The post
 915          * @param known
 916          *              {@code true} if the post is known, {@code false} otherwise
 917          */
 918         void setPostKnown(Post post, boolean known) {
 919                 postDatabase.setPostKnown(post.getId(), known);
 920         }
 921
 922         /**
 923          * Returns whether the given post reply is known.
 924          *
 925          * @param postReply
 926          *              The post reply
 927          * @return {@code true} if the given post reply is known, {@code false}
 928          *         otherwise
 929          */
 930         boolean isPostReplyKnown(PostReply postReply) {
 931                 lock.readLock().lock();
 932                 try {
 933                         return knownPostReplies.contains(postReply.getId());
 934                 } finally {
 935                         lock.readLock().unlock();
 936                 }
 937         }
 938
 939         /**
 940          * Sets whether the given post reply is known.
 941          *
 942          * @param postReply
 943          *              The post reply
 944          * @param known
 945          *              {@code true} if the post reply is known, {@code false} otherwise
 946          */
 947         void setPostReplyKnown(PostReply postReply, boolean known) {
 948                 lock.writeLock().lock();
 949                 try {
 950                         if (known) {
 951                                 knownPostReplies.add(postReply.getId());
 952                         } else {
 953                                 knownPostReplies.remove(postReply.getId());
 954                         }
 955                 } finally {
 956                         lock.writeLock().unlock();
 957                 }
 958         }
 959
 960         //
 961         // PRIVATE METHODS
 962         //
 963
 964         /**
 965          * Gets all posts for the given Sone, creating a new collection if there is
 966          * none yet.
 967          *
 968          * @param soneId
 969          *              The ID of the Sone to get the posts for
 970          * @return All posts
 971          */
 972         private Collection<Post> getPostsFrom(String soneId) {
 973                 return postDatabase.getPostsFrom(soneId);
 974         }
 975
 976         /** Loads the known post replies. */
 977         private void loadKnownPostReplies() {
 978                 Set<String> knownPostReplies = configurationLoader.loadKnownPostReplies();
 979                 lock.writeLock().lock();
 980                 try {
 981                         this.knownPostReplies.clear();
 982                         this.knownPostReplies.addAll(knownPostReplies);
 983                 } finally {
 984                         lock.writeLock().unlock();
 985                 }
 986         }
 987
 988         /**
 989          * Saves the known post replies to the configuration.
 990          *
 991          * @throws DatabaseException
 992          *              if a configuration error occurs
 993          */
 994         private void saveKnownPostReplies() throws DatabaseException {
 995                 lock.readLock().lock();
 996                 try {
 997                         int replyCounter = 0;
 998                         for (String knownReplyId : knownPostReplies) {
 999                                 configuration.getStringValue("KnownReplies/" + replyCounter++ + "/ID").setValue(
1000                                                 knownReplyId);
1001                         }
1002                         configuration.getStringValue("KnownReplies/" + replyCounter + "/ID").setValue(null);
1003                 } catch (ConfigurationException ce1) {
1004                         throw new DatabaseException("Could not save database.", ce1);
1005                 } finally {
1006                         lock.readLock().unlock();
1007                 }
1008         }
1009
1010 }