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 = newSoneBuilder().from(ownIdentity).using(
 186                                 new Client("Sone", SonePlugin.VERSION.toString())).buildLocal();
 187                 localSone.setLatestEdition(
 188                                 Optional.fromNullable(
 189                                                 Longs.tryParse(ownIdentity.getProperty(LATEST_EDITION_PROPERTY)))
 190                                 .or(0L));
 191                 localSone.setKnown(true);
 192
 193                 loadSone(localSone);
 194                 return localSone;
 195         }
 196
 197         private 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                         updateSoneTime(sone, 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         @Override
 521         public void updateSoneTime(Sone sone, long soneTime) {
 522                 soneDatabase.updateSoneTime(sone.getId(), soneTime);
 523         }
 524
 525         private void storePosts(String soneId, Collection<Post> posts) {
 526                 postDatabase.storePosts(soneId, posts);
 527         }
 528
 529         private void storePostReplies(String soneId, Collection<PostReply> postReplies) {
 530                 sonePostReplies.putAll(soneId, postReplies);
 531                 for (PostReply postReply : postReplies) {
 532                         allPostReplies.put(postReply.getId(), postReply);
 533                 }
 534         }
 535
 536         private void storeAlbums(String soneId, Collection<Album> albums) {
 537                 soneAlbums.putAll(soneId, albums);
 538                 for (Album album : albums) {
 539                         allAlbums.put(album.getId(), album);
 540                 }
 541         }
 542
 543         private void storeImages(String soneId, Collection<Image> images) {
 544                 soneImages.putAll(soneId, images);
 545                 for (Image image : images) {
 546                         allImages.put(image.getId(), image);
 547                 }
 548         }
 549
 550         @Override
 551         public void removeSone(Sone sone) {
 552                 lock.writeLock().lock();
 553                 try {
 554                         allSones.remove(sone.getId());
 555                         postDatabase.removePostsFor(sone.getId());
 556                         Collection<PostReply> removedPostReplies =
 557                                         sonePostReplies.removeAll(sone.getId());
 558                         for (PostReply removedPostReply : removedPostReplies) {
 559                                 allPostReplies.remove(removedPostReply.getId());
 560                         }
 561                         Collection<Album> removedAlbums =
 562                                         soneAlbums.removeAll(sone.getId());
 563                         for (Album removedAlbum : removedAlbums) {
 564                                 allAlbums.remove(removedAlbum.getId());
 565                         }
 566                         Collection<Image> removedImages =
 567                                         soneImages.removeAll(sone.getId());
 568                         for (Image removedImage : removedImages) {
 569                                 allImages.remove(removedImage.getId());
 570                         }
 571                 } finally {
 572                         lock.writeLock().unlock();
 573                 }
 574         }
 575
 576         @Override
 577         public Function<String, Optional<Sone>> soneLoader() {
 578                 return new Function<String, Optional<Sone>>() {
 579                         @Override
 580                         public Optional<Sone> apply(String soneId) {
 581                                 return getSone(soneId);
 582                         }
 583                 };
 584         }
 585
 586         @Override
 587         public Optional<Sone> getSone(String soneId) {
 588                 lock.readLock().lock();
 589                 try {
 590                         return fromNullable(allSones.get(soneId));
 591                 } finally {
 592                         lock.readLock().unlock();
 593                 }
 594         }
 595
 596         @Override
 597         public Collection<Sone> getSones() {
 598                 lock.readLock().lock();
 599                 try {
 600                         return new HashSet<Sone>(allSones.values());
 601                 } finally {
 602                         lock.readLock().unlock();
 603                 }
 604         }
 605
 606         @Override
 607         public Collection<LocalSone> getLocalSones() {
 608                 lock.readLock().lock();
 609                 try {
 610                         return from(allSones.values()).filter(LOCAL_SONE_FILTER).transform(new Function<Sone, LocalSone>() {
 611                                 @Override
 612                                 public LocalSone apply(Sone sone) {
 613                                         // FIXME – Sones will not always implement LocalSone
 614                                         return (LocalSone) sone;
 615                                 }
 616                         }).toSet();
 617                 } finally {
 618                         lock.readLock().unlock();
 619                 }
 620         }
 621
 622         @Override
 623         public Collection<Sone> getRemoteSones() {
 624                 lock.readLock().lock();
 625                 try {
 626                         return from(allSones.values())
 627                                         .filter(not(LOCAL_SONE_FILTER)) .toSet();
 628                 } finally {
 629                         lock.readLock().unlock();
 630                 }
 631         }
 632
 633         @Override
 634         public Collection<String> getFriends(LocalSone localSone) {
 635                 if (!localSone.isLocal()) {
 636                         return Collections.emptySet();
 637                 }
 638                 return memoryFriendDatabase.getFriends(localSone.getId());
 639         }
 640
 641         @Override
 642         public Optional<Long> getSoneFollowingTime(String remoteSoneId) {
 643                 return memoryFriendDatabase.getSoneFollowingTime(remoteSoneId);
 644         }
 645
 646         @Override
 647         public boolean isFriend(LocalSone localSone, String friendSoneId) {
 648                 if (!localSone.isLocal()) {
 649                         return false;
 650                 }
 651                 return memoryFriendDatabase.isFriend(localSone.getId(), friendSoneId);
 652         }
 653
 654         @Override
 655         public void addFriend(LocalSone localSone, String friendSoneId) {
 656                 memoryFriendDatabase.addFriend(localSone.getId(), friendSoneId);
 657         }
 658
 659         @Override
 660         public void removeFriend(LocalSone localSone, String friendSoneId) {
 661                 memoryFriendDatabase.removeFriend(localSone.getId(), friendSoneId);
 662         }
 663
 664         //
 665         // POSTPROVIDER METHODS
 666         //
 667
 668         /** {@inheritDocs} */
 669         @Override
 670         public Optional<Post> getPost(String postId) {
 671                 return postDatabase.getPost(postId);
 672         }
 673
 674         /** {@inheritDocs} */
 675         @Override
 676         public Collection<Post> getPosts(String soneId) {
 677                 return new HashSet<Post>(getPostsFrom(soneId));
 678         }
 679
 680         /** {@inheritDocs} */
 681         @Override
 682         public Collection<Post> getDirectedPosts(final String recipientId) {
 683                 return postDatabase.getDirectedPosts(recipientId);
 684         }
 685
 686         //
 687         // POSTBUILDERFACTORY METHODS
 688         //
 689
 690         /** {@inheritDocs} */
 691         @Override
 692         public PostBuilder newPostBuilder() {
 693                 return new MemoryPostBuilder(this, soneProvider);
 694         }
 695
 696         //
 697         // POSTSTORE METHODS
 698         //
 699
 700         /** {@inheritDocs} */
 701         @Override
 702         public void storePost(Post post) {
 703                 checkNotNull(post, "post must not be null");
 704                 postDatabase.storePost(post);
 705         }
 706
 707         /** {@inheritDocs} */
 708         @Override
 709         public void removePost(Post post) {
 710                 checkNotNull(post, "post must not be null");
 711                 postDatabase.removePost(post.getId());
 712         }
 713
 714         //
 715         // POSTREPLYPROVIDER METHODS
 716         //
 717
 718         /** {@inheritDocs} */
 719         @Override
 720         public Optional<PostReply> getPostReply(String id) {
 721                 lock.readLock().lock();
 722                 try {
 723                         return fromNullable(allPostReplies.get(id));
 724                 } finally {
 725                         lock.readLock().unlock();
 726                 }
 727         }
 728
 729         /** {@inheritDocs} */
 730         @Override
 731         public List<PostReply> getReplies(final String postId) {
 732                 lock.readLock().lock();
 733                 try {
 734                         return from(allPostReplies.values())
 735                                         .filter(new Predicate<PostReply>() {
 736                                                 @Override
 737                                                 public boolean apply(PostReply postReply) {
 738                                                         return postReply.getPostId().equals(postId);
 739                                                 }
 740                                         }).toSortedList(TIME_COMPARATOR);
 741                 } finally {
 742                         lock.readLock().unlock();
 743                 }
 744         }
 745
 746         //
 747         // POSTREPLYBUILDERFACTORY METHODS
 748         //
 749
 750         /** {@inheritDocs} */
 751         @Override
 752         public PostReplyBuilder newPostReplyBuilder() {
 753                 return new MemoryPostReplyBuilder(this, soneProvider);
 754         }
 755
 756         //
 757         // POSTREPLYSTORE METHODS
 758         //
 759
 760         /** {@inheritDocs} */
 761         @Override
 762         public void storePostReply(PostReply postReply) {
 763                 lock.writeLock().lock();
 764                 try {
 765                         allPostReplies.put(postReply.getId(), postReply);
 766                 } finally {
 767                         lock.writeLock().unlock();
 768                 }
 769         }
 770
 771         /** {@inheritDocs} */
 772         @Override
 773         public void removePostReply(PostReply postReply) {
 774                 lock.writeLock().lock();
 775                 try {
 776                         allPostReplies.remove(postReply.getId());
 777                 } finally {
 778                         lock.writeLock().unlock();
 779                 }
 780         }
 781
 782         //
 783         // ALBUMPROVDER METHODS
 784         //
 785
 786         @Override
 787         public Optional<Album> getAlbum(String albumId) {
 788                 lock.readLock().lock();
 789                 try {
 790                         return fromNullable(allAlbums.get(albumId));
 791                 } finally {
 792                         lock.readLock().unlock();
 793                 }
 794         }
 795
 796         //
 797         // ALBUMBUILDERFACTORY METHODS
 798         //
 799
 800         @Override
 801         public AlbumBuilder newAlbumBuilder() {
 802                 return new AlbumBuilderImpl();
 803         }
 804
 805         //
 806         // ALBUMSTORE METHODS
 807         //
 808
 809         @Override
 810         public void storeAlbum(Album album) {
 811                 lock.writeLock().lock();
 812                 try {
 813                         allAlbums.put(album.getId(), album);
 814                         soneAlbums.put(album.getSone().getId(), album);
 815                 } finally {
 816                         lock.writeLock().unlock();
 817                 }
 818         }
 819
 820         @Override
 821         public void removeAlbum(Album album) {
 822                 lock.writeLock().lock();
 823                 try {
 824                         allAlbums.remove(album.getId());
 825                         soneAlbums.remove(album.getSone().getId(), album);
 826                 } finally {
 827                         lock.writeLock().unlock();
 828                 }
 829         }
 830
 831         //
 832         // IMAGEPROVIDER METHODS
 833         //
 834
 835         @Override
 836         public Optional<Image> getImage(String imageId) {
 837                 lock.readLock().lock();
 838                 try {
 839                         return fromNullable(allImages.get(imageId));
 840                 } finally {
 841                         lock.readLock().unlock();
 842                 }
 843         }
 844
 845         //
 846         // IMAGEBUILDERFACTORY METHODS
 847         //
 848
 849         @Override
 850         public ImageBuilder newImageBuilder() {
 851                 return new ImageBuilderImpl();
 852         }
 853
 854         //
 855         // IMAGESTORE METHODS
 856         //
 857
 858         @Override
 859         public void storeImage(Image image) {
 860                 lock.writeLock().lock();
 861                 try {
 862                         allImages.put(image.getId(), image);
 863                         soneImages.put(image.getSone().getId(), image);
 864                 } finally {
 865                         lock.writeLock().unlock();
 866                 }
 867         }
 868
 869         @Override
 870         public void removeImage(Image image) {
 871                 lock.writeLock().lock();
 872                 try {
 873                         allImages.remove(image.getId());
 874                         soneImages.remove(image.getSone().getId(), image);
 875                 } finally {
 876                         lock.writeLock().unlock();
 877                 }
 878         }
 879
 880         @Override
 881         public void bookmarkPost(Post post) {
 882                 memoryBookmarkDatabase.bookmarkPost(post);
 883         }
 884
 885         @Override
 886         public void unbookmarkPost(Post post) {
 887                 memoryBookmarkDatabase.unbookmarkPost(post);
 888         }
 889
 890         @Override
 891         public boolean isPostBookmarked(Post post) {
 892                 return memoryBookmarkDatabase.isPostBookmarked(post);
 893         }
 894
 895         @Override
 896         public Set<Post> getBookmarkedPosts() {
 897                 return memoryBookmarkDatabase.getBookmarkedPosts();
 898         }
 899
 900         //
 901         // PACKAGE-PRIVATE METHODS
 902         //
 903
 904         /**
 905          * Returns whether the given post is known.
 906          *
 907          * @param post
 908          *              The post
 909          * @return {@code true} if the post is known, {@code false} otherwise
 910          */
 911         boolean isPostKnown(Post post) {
 912                 return postDatabase.isPostKnown(post.getId());
 913         }
 914
 915         /**
 916          * Sets whether the given post is known.
 917          *
 918          * @param post
 919          *              The post
 920          * @param known
 921          *              {@code true} if the post is known, {@code false} otherwise
 922          */
 923         void setPostKnown(Post post, boolean known) {
 924                 postDatabase.setPostKnown(post.getId(), known);
 925         }
 926
 927         /**
 928          * Returns whether the given post reply is known.
 929          *
 930          * @param postReply
 931          *              The post reply
 932          * @return {@code true} if the given post reply is known, {@code false}
 933          *         otherwise
 934          */
 935         boolean isPostReplyKnown(PostReply postReply) {
 936                 lock.readLock().lock();
 937                 try {
 938                         return knownPostReplies.contains(postReply.getId());
 939                 } finally {
 940                         lock.readLock().unlock();
 941                 }
 942         }
 943
 944         /**
 945          * Sets whether the given post reply is known.
 946          *
 947          * @param postReply
 948          *              The post reply
 949          * @param known
 950          *              {@code true} if the post reply is known, {@code false} otherwise
 951          */
 952         void setPostReplyKnown(PostReply postReply, boolean known) {
 953                 lock.writeLock().lock();
 954                 try {
 955                         if (known) {
 956                                 knownPostReplies.add(postReply.getId());
 957                         } else {
 958                                 knownPostReplies.remove(postReply.getId());
 959                         }
 960                 } finally {
 961                         lock.writeLock().unlock();
 962                 }
 963         }
 964
 965         //
 966         // PRIVATE METHODS
 967         //
 968
 969         /**
 970          * Gets all posts for the given Sone, creating a new collection if there is
 971          * none yet.
 972          *
 973          * @param soneId
 974          *              The ID of the Sone to get the posts for
 975          * @return All posts
 976          */
 977         private Collection<Post> getPostsFrom(String soneId) {
 978                 return postDatabase.getPostsFrom(soneId);
 979         }
 980
 981         /** Loads the known post replies. */
 982         private void loadKnownPostReplies() {
 983                 Set<String> knownPostReplies = configurationLoader.loadKnownPostReplies();
 984                 lock.writeLock().lock();
 985                 try {
 986                         this.knownPostReplies.clear();
 987                         this.knownPostReplies.addAll(knownPostReplies);
 988                 } finally {
 989                         lock.writeLock().unlock();
 990                 }
 991         }
 992
 993         /**
 994          * Saves the known post replies to the configuration.
 995          *
 996          * @throws DatabaseException
 997          *              if a configuration error occurs
 998          */
 999         private void saveKnownPostReplies() throws DatabaseException {
1000                 lock.readLock().lock();
1001                 try {
1002                         int replyCounter = 0;
1003                         for (String knownReplyId : knownPostReplies) {
1004                                 configuration.getStringValue("KnownReplies/" + replyCounter++ + "/ID").setValue(
1005                                                 knownReplyId);
1006                         }
1007                         configuration.getStringValue("KnownReplies/" + replyCounter + "/ID").setValue(null);
1008                 } catch (ConfigurationException ce1) {
1009                         throw new DatabaseException("Could not save database.", ce1);
1010                 } finally {
1011                         lock.readLock().unlock();
1012                 }
1013         }
1014
1015 }