src/main/java/net/pterodactylus/sone/core/Core.java

   1 /*
   2  * Sone - Core.java - Copyright © 2010 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.core;
  19
  20 import java.net.MalformedURLException;
  21 import java.util.ArrayList;
  22 import java.util.Collections;
  23 import java.util.HashMap;
  24 import java.util.HashSet;
  25 import java.util.List;
  26 import java.util.Map;
  27 import java.util.Set;
  28 import java.util.logging.Level;
  29 import java.util.logging.Logger;
  30
  31 import net.pterodactylus.sone.core.Options.DefaultOption;
  32 import net.pterodactylus.sone.core.Options.Option;
  33 import net.pterodactylus.sone.core.Options.OptionWatcher;
  34 import net.pterodactylus.sone.data.Client;
  35 import net.pterodactylus.sone.data.Post;
  36 import net.pterodactylus.sone.data.Profile;
  37 import net.pterodactylus.sone.data.Reply;
  38 import net.pterodactylus.sone.data.Sone;
  39 import net.pterodactylus.sone.freenet.wot.Identity;
  40 import net.pterodactylus.sone.freenet.wot.IdentityListener;
  41 import net.pterodactylus.sone.freenet.wot.IdentityManager;
  42 import net.pterodactylus.sone.freenet.wot.OwnIdentity;
  43 import net.pterodactylus.sone.main.SonePlugin;
  44 import net.pterodactylus.util.config.Configuration;
  45 import net.pterodactylus.util.config.ConfigurationException;
  46 import net.pterodactylus.util.logging.Logging;
  47 import net.pterodactylus.util.number.Numbers;
  48 import freenet.keys.FreenetURI;
  49
  50 /**
  51  * The Sone core.
  52  *
  53  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  54  */
  55 public class Core implements IdentityListener {
  56
  57         /**
  58          * Enumeration for the possible states of a {@link Sone}.
  59          *
  60          * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  61          */
  62         public enum SoneStatus {
  63
  64                 /** The Sone is unknown, i.e. not yet downloaded. */
  65                 unknown,
  66
  67                 /** The Sone is idle, i.e. not being downloaded or inserted. */
  68                 idle,
  69
  70                 /** The Sone is currently being inserted. */
  71                 inserting,
  72
  73                 /** The Sone is currently being downloaded. */
  74                 downloading,
  75         }
  76
  77         /** The logger. */
  78         private static final Logger logger = Logging.getLogger(Core.class);
  79
  80         /** The options. */
  81         private final Options options = new Options();
  82
  83         /** The core listener manager. */
  84         private final CoreListenerManager coreListenerManager = new CoreListenerManager(this);
  85
  86         /** The configuration. */
  87         private final Configuration configuration;
  88
  89         /** The identity manager. */
  90         private final IdentityManager identityManager;
  91
  92         /** Interface to freenet. */
  93         private final FreenetInterface freenetInterface;
  94
  95         /** The Sone downloader. */
  96         private final SoneDownloader soneDownloader;
  97
  98         /** Whether the core has been stopped. */
  99         private volatile boolean stopped;
 100
 101         /** The Sones’ statuses. */
 102         /* synchronize access on itself. */
 103         private final Map<Sone, SoneStatus> soneStatuses = new HashMap<Sone, SoneStatus>();
 104
 105         /** Locked local Sones. */
 106         /* synchronize on itself. */
 107         private final Set<Sone> lockedSones = new HashSet<Sone>();
 108
 109         /** Sone inserters. */
 110         /* synchronize access on this on localSones. */
 111         private final Map<Sone, SoneInserter> soneInserters = new HashMap<Sone, SoneInserter>();
 112
 113         /** All local Sones. */
 114         /* synchronize access on this on itself. */
 115         private Map<String, Sone> localSones = new HashMap<String, Sone>();
 116
 117         /** All remote Sones. */
 118         /* synchronize access on this on itself. */
 119         private Map<String, Sone> remoteSones = new HashMap<String, Sone>();
 120
 121         /** All new Sones. */
 122         private Set<String> newSones = new HashSet<String>();
 123
 124         /** All known Sones. */
 125         /* synchronize access on {@link #newSones}. */
 126         private Set<String> knownSones = new HashSet<String>();
 127
 128         /** All posts. */
 129         private Map<String, Post> posts = new HashMap<String, Post>();
 130
 131         /** All new posts. */
 132         private Set<String> newPosts = new HashSet<String>();
 133
 134         /** All known posts. */
 135         /* synchronize access on {@link #newPosts}. */
 136         private Set<String> knownPosts = new HashSet<String>();
 137
 138         /** All replies. */
 139         private Map<String, Reply> replies = new HashMap<String, Reply>();
 140
 141         /** All new replies. */
 142         private Set<String> newReplies = new HashSet<String>();
 143
 144         /** All known replies. */
 145         private Set<String> knownReplies = new HashSet<String>();
 146
 147         /**
 148          * Creates a new core.
 149          *
 150          * @param configuration
 151          *            The configuration of the core
 152          * @param freenetInterface
 153          *            The freenet interface
 154          * @param identityManager
 155          *            The identity manager
 156          */
 157         public Core(Configuration configuration, FreenetInterface freenetInterface, IdentityManager identityManager) {
 158                 this.configuration = configuration;
 159                 this.freenetInterface = freenetInterface;
 160                 this.identityManager = identityManager;
 161                 this.soneDownloader = new SoneDownloader(this, freenetInterface);
 162         }
 163
 164         //
 165         // LISTENER MANAGEMENT
 166         //
 167
 168         /**
 169          * Adds a new core listener.
 170          *
 171          * @param coreListener
 172          *            The listener to add
 173          */
 174         public void addCoreListener(CoreListener coreListener) {
 175                 coreListenerManager.addListener(coreListener);
 176         }
 177
 178         /**
 179          * Removes a core listener.
 180          *
 181          * @param coreListener
 182          *            The listener to remove
 183          */
 184         public void removeCoreListener(CoreListener coreListener) {
 185                 coreListenerManager.removeListener(coreListener);
 186         }
 187
 188         //
 189         // ACCESSORS
 190         //
 191
 192         /**
 193          * Returns the options used by the core.
 194          *
 195          * @return The options of the core
 196          */
 197         public Options getOptions() {
 198                 return options;
 199         }
 200
 201         /**
 202          * Returns whether the “Sone rescue mode” is currently activated.
 203          *
 204          * @return {@code true} if the “Sone rescue mode” is currently activated,
 205          *         {@code false} if it is not
 206          */
 207         public boolean isSoneRescueMode() {
 208                 return options.getBooleanOption("SoneRescueMode").get();
 209         }
 210
 211         /**
 212          * Returns the identity manager used by the core.
 213          *
 214          * @return The identity manager
 215          */
 216         public IdentityManager getIdentityManager() {
 217                 return identityManager;
 218         }
 219
 220         /**
 221          * Returns the status of the given Sone.
 222          *
 223          * @param sone
 224          *            The Sone to get the status for
 225          * @return The status of the Sone
 226          */
 227         public SoneStatus getSoneStatus(Sone sone) {
 228                 synchronized (soneStatuses) {
 229                         return soneStatuses.get(sone);
 230                 }
 231         }
 232
 233         /**
 234          * Sets the status of the given Sone.
 235          *
 236          * @param sone
 237          *            The Sone to set the status of
 238          * @param soneStatus
 239          *            The status to set
 240          */
 241         public void setSoneStatus(Sone sone, SoneStatus soneStatus) {
 242                 synchronized (soneStatuses) {
 243                         soneStatuses.put(sone, soneStatus);
 244                 }
 245         }
 246
 247         /**
 248          * Returns whether the given Sone is currently locked.
 249          *
 250          * @param sone
 251          *            The sone to check
 252          * @return {@code true} if the Sone is locked, {@code false} if it is not
 253          */
 254         public boolean isLocked(Sone sone) {
 255                 synchronized (lockedSones) {
 256                         return lockedSones.contains(sone);
 257                 }
 258         }
 259
 260         /**
 261          * Returns all Sones, remote and local.
 262          *
 263          * @return All Sones
 264          */
 265         public Set<Sone> getSones() {
 266                 Set<Sone> allSones = new HashSet<Sone>();
 267                 allSones.addAll(getLocalSones());
 268                 allSones.addAll(getRemoteSones());
 269                 return allSones;
 270         }
 271
 272         /**
 273          * Returns the Sone with the given ID, regardless whether it’s local or
 274          * remote.
 275          *
 276          * @param id
 277          *            The ID of the Sone to get
 278          * @return The Sone with the given ID, or {@code null} if there is no such
 279          *         Sone
 280          */
 281         public Sone getSone(String id) {
 282                 return getSone(id, true);
 283         }
 284
 285         /**
 286          * Returns the Sone with the given ID, regardless whether it’s local or
 287          * remote.
 288          *
 289          * @param id
 290          *            The ID of the Sone to get
 291          * @param create
 292          *            {@code true} to create a new Sone if none exists,
 293          *            {@code false} to return {@code null} if a Sone with the given
 294          *            ID does not exist
 295          * @return The Sone with the given ID, or {@code null} if there is no such
 296          *         Sone
 297          */
 298         public Sone getSone(String id, boolean create) {
 299                 if (isLocalSone(id)) {
 300                         return getLocalSone(id);
 301                 }
 302                 return getRemoteSone(id, create);
 303         }
 304
 305         /**
 306          * Checks whether the core knows a Sone with the given ID.
 307          *
 308          * @param id
 309          *            The ID of the Sone
 310          * @return {@code true} if there is a Sone with the given ID, {@code false}
 311          *         otherwise
 312          */
 313         public boolean hasSone(String id) {
 314                 return isLocalSone(id) || isRemoteSone(id);
 315         }
 316
 317         /**
 318          * Returns whether the given Sone is a local Sone.
 319          *
 320          * @param sone
 321          *            The Sone to check for its locality
 322          * @return {@code true} if the given Sone is local, {@code false} otherwise
 323          */
 324         public boolean isLocalSone(Sone sone) {
 325                 synchronized (localSones) {
 326                         return localSones.containsKey(sone.getId());
 327                 }
 328         }
 329
 330         /**
 331          * Returns whether the given ID is the ID of a local Sone.
 332          *
 333          * @param id
 334          *            The Sone ID to check for its locality
 335          * @return {@code true} if the given ID is a local Sone, {@code false}
 336          *         otherwise
 337          */
 338         public boolean isLocalSone(String id) {
 339                 synchronized (localSones) {
 340                         return localSones.containsKey(id);
 341                 }
 342         }
 343
 344         /**
 345          * Returns all local Sones.
 346          *
 347          * @return All local Sones
 348          */
 349         public Set<Sone> getLocalSones() {
 350                 synchronized (localSones) {
 351                         return new HashSet<Sone>(localSones.values());
 352                 }
 353         }
 354
 355         /**
 356          * Returns the local Sone with the given ID.
 357          *
 358          * @param id
 359          *            The ID of the Sone to get
 360          * @return The Sone with the given ID
 361          */
 362         public Sone getLocalSone(String id) {
 363                 return getLocalSone(id, true);
 364         }
 365
 366         /**
 367          * Returns the local Sone with the given ID, optionally creating a new Sone.
 368          *
 369          * @param id
 370          *            The ID of the Sone
 371          * @param create
 372          *            {@code true} to create a new Sone if none exists,
 373          *            {@code false} to return null if none exists
 374          * @return The Sone with the given ID, or {@code null}
 375          */
 376         public Sone getLocalSone(String id, boolean create) {
 377                 synchronized (localSones) {
 378                         Sone sone = localSones.get(id);
 379                         if ((sone == null) && create) {
 380                                 sone = new Sone(id);
 381                                 localSones.put(id, sone);
 382                         }
 383                         return sone;
 384                 }
 385         }
 386
 387         /**
 388          * Returns all remote Sones.
 389          *
 390          * @return All remote Sones
 391          */
 392         public Set<Sone> getRemoteSones() {
 393                 synchronized (remoteSones) {
 394                         return new HashSet<Sone>(remoteSones.values());
 395                 }
 396         }
 397
 398         /**
 399          * Returns the remote Sone with the given ID.
 400          *
 401          * @param id
 402          *            The ID of the remote Sone to get
 403          * @return The Sone with the given ID
 404          */
 405         public Sone getRemoteSone(String id) {
 406                 return getRemoteSone(id, true);
 407         }
 408
 409         /**
 410          * Returns the remote Sone with the given ID.
 411          *
 412          * @param id
 413          *            The ID of the remote Sone to get
 414          * @param create
 415          *            {@code true} to always create a Sone, {@code false} to return
 416          *            {@code null} if no Sone with the given ID exists
 417          * @return The Sone with the given ID
 418          */
 419         public Sone getRemoteSone(String id, boolean create) {
 420                 synchronized (remoteSones) {
 421                         Sone sone = remoteSones.get(id);
 422                         if ((sone == null) && create) {
 423                                 sone = new Sone(id);
 424                                 remoteSones.put(id, sone);
 425                         }
 426                         return sone;
 427                 }
 428         }
 429
 430         /**
 431          * Returns whether the given Sone is a remote Sone.
 432          *
 433          * @param sone
 434          *            The Sone to check
 435          * @return {@code true} if the given Sone is a remote Sone, {@code false}
 436          *         otherwise
 437          */
 438         public boolean isRemoteSone(Sone sone) {
 439                 synchronized (remoteSones) {
 440                         return remoteSones.containsKey(sone.getId());
 441                 }
 442         }
 443
 444         /**
 445          * Returns whether the Sone with the given ID is a remote Sone.
 446          *
 447          * @param id
 448          *            The ID of the Sone to check
 449          * @return {@code true} if the Sone with the given ID is a remote Sone,
 450          *         {@code false} otherwise
 451          */
 452         public boolean isRemoteSone(String id) {
 453                 synchronized (remoteSones) {
 454                         return remoteSones.containsKey(id);
 455                 }
 456         }
 457
 458         /**
 459          * Returns whether the given Sone is a new Sone. After this check, the Sone
 460          * is marked as known, i.e. a second call with the same parameters will
 461          * always yield {@code false}.
 462          *
 463          * @param sone
 464          *            The sone to check for
 465          * @return {@code true} if the given Sone is new, false otherwise
 466          */
 467         public boolean isNewSone(Sone sone) {
 468                 synchronized (newSones) {
 469                         boolean isNew = !knownSones.contains(sone.getId()) && newSones.remove(sone.getId());
 470                         knownSones.add(sone.getId());
 471                         if (isNew) {
 472                                 coreListenerManager.fireMarkSoneKnown(sone);
 473                         }
 474                         return isNew;
 475                 }
 476         }
 477
 478         /**
 479          * Returns whether the given Sone has been modified.
 480          *
 481          * @param sone
 482          *            The Sone to check for modifications
 483          * @return {@code true} if a modification has been detected in the Sone,
 484          *         {@code false} otherwise
 485          */
 486         public boolean isModifiedSone(Sone sone) {
 487                 return (soneInserters.containsKey(sone)) ? soneInserters.get(sone).isModified() : false;
 488         }
 489
 490         /**
 491          * Returns the post with the given ID.
 492          *
 493          * @param postId
 494          *            The ID of the post to get
 495          * @return The post, or {@code null} if there is no such post
 496          */
 497         public Post getPost(String postId) {
 498                 synchronized (posts) {
 499                         Post post = posts.get(postId);
 500                         if (post == null) {
 501                                 post = new Post(postId);
 502                                 posts.put(postId, post);
 503                         }
 504                         return post;
 505                 }
 506         }
 507
 508         /**
 509          * Returns whether the given post ID is new. After this method returns it is
 510          * marked a known post ID.
 511          *
 512          * @param postId
 513          *            The post ID
 514          * @return {@code true} if the post is considered to be new, {@code false}
 515          *         otherwise
 516          */
 517         public boolean isNewPost(String postId) {
 518                 synchronized (newPosts) {
 519                         boolean isNew = !knownPosts.contains(postId) && newPosts.remove(postId);
 520                         knownPosts.add(postId);
 521                         if (isNew) {
 522                                 coreListenerManager.fireMarkPostKnown(getPost(postId));
 523                         }
 524                         return isNew;
 525                 }
 526         }
 527
 528         /**
 529          * Returns the reply with the given ID.
 530          *
 531          * @param replyId
 532          *            The ID of the reply to get
 533          * @return The reply, or {@code null} if there is no such reply
 534          */
 535         public Reply getReply(String replyId) {
 536                 synchronized (replies) {
 537                         Reply reply = replies.get(replyId);
 538                         if (reply == null) {
 539                                 reply = new Reply(replyId);
 540                                 replies.put(replyId, reply);
 541                         }
 542                         return reply;
 543                 }
 544         }
 545
 546         /**
 547          * Returns all replies for the given post, order ascending by time.
 548          *
 549          * @param post
 550          *            The post to get all replies for
 551          * @return All replies for the given post
 552          */
 553         public List<Reply> getReplies(Post post) {
 554                 Set<Sone> sones = getSones();
 555                 List<Reply> replies = new ArrayList<Reply>();
 556                 for (Sone sone : sones) {
 557                         for (Reply reply : sone.getReplies()) {
 558                                 if (reply.getPost().equals(post)) {
 559                                         replies.add(reply);
 560                                 }
 561                         }
 562                 }
 563                 Collections.sort(replies, Reply.TIME_COMPARATOR);
 564                 return replies;
 565         }
 566
 567         /**
 568          * Returns whether the reply with the given ID is new.
 569          *
 570          * @param replyId
 571          *            The ID of the reply to check
 572          * @return {@code true} if the reply is considered to be new, {@code false}
 573          *         otherwise
 574          */
 575         public boolean isNewReply(String replyId) {
 576                 synchronized (newReplies) {
 577                         boolean isNew = !knownReplies.contains(replyId) && newReplies.remove(replyId);
 578                         knownReplies.add(replyId);
 579                         if (isNew) {
 580                                 coreListenerManager.fireMarkReplyKnown(getReply(replyId));
 581                         }
 582                         return isNew;
 583                 }
 584         }
 585
 586         /**
 587          * Returns all Sones that have liked the given post.
 588          *
 589          * @param post
 590          *            The post to get the liking Sones for
 591          * @return The Sones that like the given post
 592          */
 593         public Set<Sone> getLikes(Post post) {
 594                 Set<Sone> sones = new HashSet<Sone>();
 595                 for (Sone sone : getSones()) {
 596                         if (sone.getLikedPostIds().contains(post.getId())) {
 597                                 sones.add(sone);
 598                         }
 599                 }
 600                 return sones;
 601         }
 602
 603         /**
 604          * Returns all Sones that have liked the given reply.
 605          *
 606          * @param reply
 607          *            The reply to get the liking Sones for
 608          * @return The Sones that like the given reply
 609          */
 610         public Set<Sone> getLikes(Reply reply) {
 611                 Set<Sone> sones = new HashSet<Sone>();
 612                 for (Sone sone : getSones()) {
 613                         if (sone.getLikedReplyIds().contains(reply.getId())) {
 614                                 sones.add(sone);
 615                         }
 616                 }
 617                 return sones;
 618         }
 619
 620         //
 621         // ACTIONS
 622         //
 623
 624         /**
 625          * Locks the given Sone. A locked Sone will not be inserted by
 626          * {@link SoneInserter} until it is {@link #unlockSone(Sone) unlocked}
 627          * again.
 628          *
 629          * @param sone
 630          *            The sone to lock
 631          */
 632         public void lockSone(Sone sone) {
 633                 synchronized (lockedSones) {
 634                         lockedSones.add(sone);
 635                 }
 636         }
 637
 638         /**
 639          * Unlocks the given Sone.
 640          *
 641          * @see #lockSone(Sone)
 642          * @param sone
 643          *            The sone to unlock
 644          */
 645         public void unlockSone(Sone sone) {
 646                 synchronized (lockedSones) {
 647                         lockedSones.remove(sone);
 648                 }
 649         }
 650
 651         /**
 652          * Adds a local Sone from the given ID which has to be the ID of an own
 653          * identity.
 654          *
 655          * @param id
 656          *            The ID of an own identity to add a Sone for
 657          * @return The added (or already existing) Sone
 658          */
 659         public Sone addLocalSone(String id) {
 660                 synchronized (localSones) {
 661                         if (localSones.containsKey(id)) {
 662                                 logger.log(Level.FINE, "Tried to add known local Sone: %s", id);
 663                                 return localSones.get(id);
 664                         }
 665                         OwnIdentity ownIdentity = identityManager.getOwnIdentity(id);
 666                         if (ownIdentity == null) {
 667                                 logger.log(Level.INFO, "Invalid Sone ID: %s", id);
 668                                 return null;
 669                         }
 670                         return addLocalSone(ownIdentity);
 671                 }
 672         }
 673
 674         /**
 675          * Adds a local Sone from the given own identity.
 676          *
 677          * @param ownIdentity
 678          *            The own identity to create a Sone from
 679          * @return The added (or already existing) Sone
 680          */
 681         public Sone addLocalSone(OwnIdentity ownIdentity) {
 682                 if (ownIdentity == null) {
 683                         logger.log(Level.WARNING, "Given OwnIdentity is null!");
 684                         return null;
 685                 }
 686                 synchronized (localSones) {
 687                         final Sone sone;
 688                         try {
 689                                 sone = getLocalSone(ownIdentity.getId()).setIdentity(ownIdentity).setInsertUri(new FreenetURI(ownIdentity.getInsertUri())).setRequestUri(new FreenetURI(ownIdentity.getRequestUri()));
 690                         } catch (MalformedURLException mue1) {
 691                                 logger.log(Level.SEVERE, "Could not convert the Identity’s URIs to Freenet URIs: " + ownIdentity.getInsertUri() + ", " + ownIdentity.getRequestUri(), mue1);
 692                                 return null;
 693                         }
 694                         sone.setLatestEdition(Numbers.safeParseLong(ownIdentity.getProperty("Sone.LatestEdition"), (long) 0));
 695                         sone.setClient(new Client("Sone", SonePlugin.VERSION.toString()));
 696                         /* TODO - load posts ’n stuff */
 697                         localSones.put(ownIdentity.getId(), sone);
 698                         final SoneInserter soneInserter = new SoneInserter(this, freenetInterface, sone);
 699                         soneInserters.put(sone, soneInserter);
 700                         setSoneStatus(sone, SoneStatus.idle);
 701                         loadSone(sone);
 702                         if (!isSoneRescueMode()) {
 703                                 soneInserter.start();
 704                         }
 705                         new Thread(new Runnable() {
 706
 707                                 @Override
 708                                 @SuppressWarnings("synthetic-access")
 709                                 public void run() {
 710                                         if (!isSoneRescueMode()) {
 711                                                 soneDownloader.fetchSone(sone);
 712                                                 return;
 713                                         }
 714                                         logger.log(Level.INFO, "Trying to restore Sone from Freenet…");
 715                                         long edition = sone.getLatestEdition();
 716                                         while (!stopped && (edition >= 0) && isSoneRescueMode()) {
 717                                                 logger.log(Level.FINE, "Downloading edition " + edition + "…");
 718                                                 soneDownloader.fetchSone(sone, sone.getRequestUri().setKeyType("SSK").setDocName("Sone-" + edition));
 719                                                 --edition;
 720                                         }
 721                                         logger.log(Level.INFO, "Finished restoring Sone from Freenet, starting Inserter…");
 722                                         soneInserter.start();
 723                                 }
 724
 725                         }, "Sone Downloader").start();
 726                         return sone;
 727                 }
 728         }
 729
 730         /**
 731          * Creates a new Sone for the given own identity.
 732          *
 733          * @param ownIdentity
 734          *            The own identity to create a Sone for
 735          * @return The created Sone
 736          */
 737         public Sone createSone(OwnIdentity ownIdentity) {
 738                 identityManager.addContext(ownIdentity, "Sone");
 739                 Sone sone = addLocalSone(ownIdentity);
 740                 return sone;
 741         }
 742
 743         /**
 744          * Adds the Sone of the given identity.
 745          *
 746          * @param identity
 747          *            The identity whose Sone to add
 748          * @return The added or already existing Sone
 749          */
 750         public Sone addRemoteSone(Identity identity) {
 751                 if (identity == null) {
 752                         logger.log(Level.WARNING, "Given Identity is null!");
 753                         return null;
 754                 }
 755                 synchronized (remoteSones) {
 756                         final Sone sone = getRemoteSone(identity.getId()).setIdentity(identity);
 757                         boolean newSone = sone.getRequestUri() == null;
 758                         sone.setRequestUri(getSoneUri(identity.getRequestUri()));
 759                         sone.setLatestEdition(Numbers.safeParseLong(identity.getProperty("Sone.LatestEdition"), (long) 0));
 760                         if (newSone) {
 761                                 synchronized (newSones) {
 762                                         newSone = !knownSones.contains(sone.getId());
 763                                         if (newSone) {
 764                                                 newSones.add(sone.getId());
 765                                         }
 766                                 }
 767                                 if (newSone) {
 768                                         coreListenerManager.fireNewSoneFound(sone);
 769                                 }
 770                         }
 771                         remoteSones.put(identity.getId(), sone);
 772                         soneDownloader.addSone(sone);
 773                         setSoneStatus(sone, SoneStatus.unknown);
 774                         new Thread(new Runnable() {
 775
 776                                 @Override
 777                                 @SuppressWarnings("synthetic-access")
 778                                 public void run() {
 779                                         soneDownloader.fetchSone(sone);
 780                                 }
 781
 782                         }, "Sone Downloader").start();
 783                         return sone;
 784                 }
 785         }
 786
 787         /**
 788          * Updates the stores Sone with the given Sone.
 789          *
 790          * @param sone
 791          *            The updated Sone
 792          */
 793         public void updateSone(Sone sone) {
 794                 if (hasSone(sone.getId())) {
 795                         boolean soneRescueMode = isLocalSone(sone) && isSoneRescueMode();
 796                         Sone storedSone = getSone(sone.getId());
 797                         if (!soneRescueMode && !(sone.getTime() > storedSone.getTime())) {
 798                                 logger.log(Level.FINE, "Downloaded Sone %s is not newer than stored Sone %s.", new Object[] { sone, storedSone });
 799                                 return;
 800                         }
 801                         synchronized (posts) {
 802                                 if (!soneRescueMode) {
 803                                         for (Post post : storedSone.getPosts()) {
 804                                                 posts.remove(post.getId());
 805                                         }
 806                                 }
 807                                 synchronized (newPosts) {
 808                                         for (Post post : sone.getPosts()) {
 809                                                 if (!storedSone.getPosts().contains(post) && !knownPosts.contains(post.getId())) {
 810                                                         post.setSone(getSone(post.getSone().getId()));
 811                                                         newPosts.add(post.getId());
 812                                                         coreListenerManager.fireNewPostFound(post);
 813                                                 }
 814                                                 posts.put(post.getId(), post);
 815                                         }
 816                                 }
 817                         }
 818                         synchronized (replies) {
 819                                 if (!soneRescueMode) {
 820                                         for (Reply reply : storedSone.getReplies()) {
 821                                                 replies.remove(reply.getId());
 822                                         }
 823                                 }
 824                                 synchronized (newReplies) {
 825                                         for (Reply reply : sone.getReplies()) {
 826                                                 if (!storedSone.getReplies().contains(reply) && !knownReplies.contains(reply.getId())) {
 827                                                         newReplies.add(reply.getId());
 828                                                         coreListenerManager.fireNewReplyFound(reply);
 829                                                 }
 830                                                 replies.put(reply.getId(), reply);
 831                                         }
 832                                 }
 833                         }
 834                         synchronized (storedSone) {
 835                                 storedSone.setTime(sone.getTime());
 836                                 storedSone.setClient(sone.getClient());
 837                                 storedSone.setProfile(sone.getProfile());
 838                                 if (soneRescueMode) {
 839                                         for (Post post : sone.getPosts()) {
 840                                                 storedSone.addPost(post);
 841                                         }
 842                                         for (Reply reply : sone.getReplies()) {
 843                                                 storedSone.addReply(reply);
 844                                         }
 845                                         for (String likedPostId : sone.getLikedPostIds()) {
 846                                                 storedSone.addLikedPostId(likedPostId);
 847                                         }
 848                                         for (String likedReplyId : sone.getLikedReplyIds()) {
 849                                                 storedSone.addLikedReplyId(likedReplyId);
 850                                         }
 851                                 } else {
 852                                         storedSone.setPosts(sone.getPosts());
 853                                         storedSone.setReplies(sone.getReplies());
 854                                         storedSone.setLikePostIds(sone.getLikedPostIds());
 855                                         storedSone.setLikeReplyIds(sone.getLikedReplyIds());
 856                                 }
 857                                 storedSone.setLatestEdition(sone.getRequestUri().getEdition());
 858                         }
 859                 }
 860         }
 861
 862         /**
 863          * Deletes the given Sone. This will remove the Sone from the
 864          * {@link #getLocalSone(String) local Sones}, stops its {@link SoneInserter}
 865          * and remove the context from its identity.
 866          *
 867          * @param sone
 868          *            The Sone to delete
 869          */
 870         public void deleteSone(Sone sone) {
 871                 if (!(sone.getIdentity() instanceof OwnIdentity)) {
 872                         logger.log(Level.WARNING, "Tried to delete Sone of non-own identity: %s", sone);
 873                         return;
 874                 }
 875                 synchronized (localSones) {
 876                         if (!localSones.containsKey(sone.getId())) {
 877                                 logger.log(Level.WARNING, "Tried to delete non-local Sone: %s", sone);
 878                                 return;
 879                         }
 880                         localSones.remove(sone.getId());
 881                         soneInserters.remove(sone).stop();
 882                 }
 883                 identityManager.removeContext((OwnIdentity) sone.getIdentity(), "Sone");
 884                 identityManager.removeProperty((OwnIdentity) sone.getIdentity(), "Sone.LatestEdition");
 885                 try {
 886                         configuration.getLongValue("Sone/" + sone.getId() + "/Time").setValue(null);
 887                 } catch (ConfigurationException ce1) {
 888                         logger.log(Level.WARNING, "Could not remove Sone from configuration!", ce1);
 889                 }
 890         }
 891
 892         /**
 893          * Loads and updates the given Sone from the configuration. If any error is
 894          * encountered, loading is aborted and the given Sone is not changed.
 895          *
 896          * @param sone
 897          *            The Sone to load and update
 898          */
 899         public void loadSone(Sone sone) {
 900                 if (!isLocalSone(sone)) {
 901                         logger.log(Level.FINE, "Tried to load non-local Sone: %s", sone);
 902                         return;
 903                 }
 904
 905                 /* load Sone. */
 906                 String sonePrefix = "Sone/" + sone.getId();
 907                 Long soneTime = configuration.getLongValue(sonePrefix + "/Time").getValue(null);
 908                 if (soneTime == null) {
 909                         logger.log(Level.INFO, "Could not load Sone because no Sone has been saved.");
 910                         return;
 911                 }
 912                 String lastInsertFingerprint = configuration.getStringValue(sonePrefix + "/LastInsertFingerprint").getValue("");
 913
 914                 /* load profile. */
 915                 Profile profile = new Profile();
 916                 profile.setFirstName(configuration.getStringValue(sonePrefix + "/Profile/FirstName").getValue(null));
 917                 profile.setMiddleName(configuration.getStringValue(sonePrefix + "/Profile/MiddleName").getValue(null));
 918                 profile.setLastName(configuration.getStringValue(sonePrefix + "/Profile/LastName").getValue(null));
 919                 profile.setBirthDay(configuration.getIntValue(sonePrefix + "/Profile/BirthDay").getValue(null));
 920                 profile.setBirthMonth(configuration.getIntValue(sonePrefix + "/Profile/BirthMonth").getValue(null));
 921                 profile.setBirthYear(configuration.getIntValue(sonePrefix + "/Profile/BirthYear").getValue(null));
 922
 923                 /* load posts. */
 924                 Set<Post> posts = new HashSet<Post>();
 925                 while (true) {
 926                         String postPrefix = sonePrefix + "/Posts/" + posts.size();
 927                         String postId = configuration.getStringValue(postPrefix + "/ID").getValue(null);
 928                         if (postId == null) {
 929                                 break;
 930                         }
 931                         long postTime = configuration.getLongValue(postPrefix + "/Time").getValue((long) 0);
 932                         String postText = configuration.getStringValue(postPrefix + "/Text").getValue(null);
 933                         if ((postTime == 0) || (postText == null)) {
 934                                 logger.log(Level.WARNING, "Invalid post found, aborting load!");
 935                                 return;
 936                         }
 937                         posts.add(getPost(postId).setSone(sone).setTime(postTime).setText(postText));
 938                 }
 939
 940                 /* load replies. */
 941                 Set<Reply> replies = new HashSet<Reply>();
 942                 while (true) {
 943                         String replyPrefix = sonePrefix + "/Replies/" + replies.size();
 944                         String replyId = configuration.getStringValue(replyPrefix + "/ID").getValue(null);
 945                         if (replyId == null) {
 946                                 break;
 947                         }
 948                         String postId = configuration.getStringValue(replyPrefix + "/Post/ID").getValue(null);
 949                         long replyTime = configuration.getLongValue(replyPrefix + "/Time").getValue((long) 0);
 950                         String replyText = configuration.getStringValue(replyPrefix + "/Text").getValue(null);
 951                         if ((postId == null) || (replyTime == 0) || (replyText == null)) {
 952                                 logger.log(Level.WARNING, "Invalid reply found, aborting load!");
 953                                 return;
 954                         }
 955                         replies.add(getReply(replyId).setSone(sone).setPost(getPost(postId)).setTime(replyTime).setText(replyText));
 956                 }
 957
 958                 /* load post likes. */
 959                 Set<String> likedPostIds = new HashSet<String>();
 960                 while (true) {
 961                         String likedPostId = configuration.getStringValue(sonePrefix + "/Likes/Post/" + likedPostIds.size() + "/ID").getValue(null);
 962                         if (likedPostId == null) {
 963                                 break;
 964                         }
 965                         likedPostIds.add(likedPostId);
 966                 }
 967
 968                 /* load reply likes. */
 969                 Set<String> likedReplyIds = new HashSet<String>();
 970                 while (true) {
 971                         String likedReplyId = configuration.getStringValue(sonePrefix + "/Likes/Reply/" + likedReplyIds.size() + "/ID").getValue(null);
 972                         if (likedReplyId == null) {
 973                                 break;
 974                         }
 975                         likedReplyIds.add(likedReplyId);
 976                 }
 977
 978                 /* load friends. */
 979                 Set<String> friends = new HashSet<String>();
 980                 while (true) {
 981                         String friendId = configuration.getStringValue(sonePrefix + "/Friends/" + friends.size() + "/ID").getValue(null);
 982                         if (friendId == null) {
 983                                 break;
 984                         }
 985                         friends.add(friendId);
 986                 }
 987
 988                 /* if we’re still here, Sone was loaded successfully. */
 989                 synchronized (sone) {
 990                         sone.setTime(soneTime);
 991                         sone.setProfile(profile);
 992                         sone.setPosts(posts);
 993                         sone.setReplies(replies);
 994                         sone.setLikePostIds(likedPostIds);
 995                         sone.setLikeReplyIds(likedReplyIds);
 996                         sone.setFriends(friends);
 997                         soneInserters.get(sone).setLastInsertFingerprint(lastInsertFingerprint);
 998                 }
 999                 synchronized (newSones) {
1000                         for (String friend : friends) {
1001                                 knownSones.add(friend);
1002                         }
1003                 }
1004                 synchronized (newPosts) {
1005                         for (Post post : posts) {
1006                                 knownPosts.add(post.getId());
1007                         }
1008                 }
1009                 synchronized (newReplies) {
1010                         for (Reply reply : replies) {
1011                                 knownReplies.add(reply.getId());
1012                         }
1013                 }
1014         }
1015
1016         /**
1017          * Saves the given Sone. This will persist all local settings for the given
1018          * Sone, such as the friends list and similar, private options.
1019          *
1020          * @param sone
1021          *            The Sone to save
1022          */
1023         public void saveSone(Sone sone) {
1024                 if (!isLocalSone(sone)) {
1025                         logger.log(Level.FINE, "Tried to save non-local Sone: %s", sone);
1026                         return;
1027                 }
1028                 if (!(sone.getIdentity() instanceof OwnIdentity)) {
1029                         logger.log(Level.WARNING, "Local Sone without OwnIdentity found, refusing to save: %s", sone);
1030                         return;
1031                 }
1032
1033                 logger.log(Level.INFO, "Saving Sone: %s", sone);
1034                 identityManager.setProperty((OwnIdentity) sone.getIdentity(), "Sone.LatestEdition", String.valueOf(sone.getLatestEdition()));
1035                 try {
1036                         /* save Sone into configuration. */
1037                         String sonePrefix = "Sone/" + sone.getId();
1038                         configuration.getLongValue(sonePrefix + "/Time").setValue(sone.getTime());
1039                         configuration.getStringValue(sonePrefix + "/LastInsertFingerprint").setValue(soneInserters.get(sone).getLastInsertFingerprint());
1040
1041                         /* save profile. */
1042                         Profile profile = sone.getProfile();
1043                         configuration.getStringValue(sonePrefix + "/Profile/FirstName").setValue(profile.getFirstName());
1044                         configuration.getStringValue(sonePrefix + "/Profile/MiddleName").setValue(profile.getMiddleName());
1045                         configuration.getStringValue(sonePrefix + "/Profile/LastName").setValue(profile.getLastName());
1046                         configuration.getIntValue(sonePrefix + "/Profile/BirthDay").setValue(profile.getBirthDay());
1047                         configuration.getIntValue(sonePrefix + "/Profile/BirthMonth").setValue(profile.getBirthMonth());
1048                         configuration.getIntValue(sonePrefix + "/Profile/BirthYear").setValue(profile.getBirthYear());
1049
1050                         /* save posts. */
1051                         int postCounter = 0;
1052                         for (Post post : sone.getPosts()) {
1053                                 String postPrefix = sonePrefix + "/Posts/" + postCounter++;
1054                                 configuration.getStringValue(postPrefix + "/ID").setValue(post.getId());
1055                                 configuration.getLongValue(postPrefix + "/Time").setValue(post.getTime());
1056                                 configuration.getStringValue(postPrefix + "/Text").setValue(post.getText());
1057                         }
1058                         configuration.getStringValue(sonePrefix + "/Posts/" + postCounter + "/ID").setValue(null);
1059
1060                         /* save replies. */
1061                         int replyCounter = 0;
1062                         for (Reply reply : sone.getReplies()) {
1063                                 String replyPrefix = sonePrefix + "/Replies/" + replyCounter++;
1064                                 configuration.getStringValue(replyPrefix + "/ID").setValue(reply.getId());
1065                                 configuration.getStringValue(replyPrefix + "/Post/ID").setValue(reply.getPost().getId());
1066                                 configuration.getLongValue(replyPrefix + "/Time").setValue(reply.getTime());
1067                                 configuration.getStringValue(replyPrefix + "/Text").setValue(reply.getText());
1068                         }
1069                         configuration.getStringValue(sonePrefix + "/Replies/" + replyCounter + "/ID").setValue(null);
1070
1071                         /* save post likes. */
1072                         int postLikeCounter = 0;
1073                         for (String postId : sone.getLikedPostIds()) {
1074                                 configuration.getStringValue(sonePrefix + "/Likes/Post/" + postLikeCounter++ + "/ID").setValue(postId);
1075                         }
1076                         configuration.getStringValue(sonePrefix + "/Likes/Post/" + postLikeCounter + "/ID").setValue(null);
1077
1078                         /* save reply likes. */
1079                         int replyLikeCounter = 0;
1080                         for (String replyId : sone.getLikedReplyIds()) {
1081                                 configuration.getStringValue(sonePrefix + "/Likes/Reply/" + replyLikeCounter++ + "/ID").setValue(replyId);
1082                         }
1083                         configuration.getStringValue(sonePrefix + "/Likes/Reply/" + replyLikeCounter + "/ID").setValue(null);
1084
1085                         /* save friends. */
1086                         int friendCounter = 0;
1087                         for (String friendId : sone.getFriends()) {
1088                                 configuration.getStringValue(sonePrefix + "/Friends/" + friendCounter++ + "/ID").setValue(friendId);
1089                         }
1090                         configuration.getStringValue(sonePrefix + "/Friends/" + friendCounter + "/ID").setValue(null);
1091
1092                         logger.log(Level.INFO, "Sone %s saved.", sone);
1093                 } catch (ConfigurationException ce1) {
1094                         logger.log(Level.WARNING, "Could not save Sone: " + sone, ce1);
1095                 }
1096         }
1097
1098         /**
1099          * Creates a new post.
1100          *
1101          * @param sone
1102          *            The Sone that creates the post
1103          * @param text
1104          *            The text of the post
1105          */
1106         public void createPost(Sone sone, String text) {
1107                 createPost(sone, System.currentTimeMillis(), text);
1108         }
1109
1110         /**
1111          * Creates a new post.
1112          *
1113          * @param sone
1114          *            The Sone that creates the post
1115          * @param time
1116          *            The time of the post
1117          * @param text
1118          *            The text of the post
1119          */
1120         public void createPost(Sone sone, long time, String text) {
1121                 if (!isLocalSone(sone)) {
1122                         logger.log(Level.FINE, "Tried to create post for non-local Sone: %s", sone);
1123                         return;
1124                 }
1125                 Post post = new Post(sone, time, text);
1126                 synchronized (posts) {
1127                         posts.put(post.getId(), post);
1128                 }
1129                 synchronized (newPosts) {
1130                         knownPosts.add(post.getId());
1131                 }
1132                 sone.addPost(post);
1133                 saveSone(sone);
1134         }
1135
1136         /**
1137          * Deletes the given post.
1138          *
1139          * @param post
1140          *            The post to delete
1141          */
1142         public void deletePost(Post post) {
1143                 if (!isLocalSone(post.getSone())) {
1144                         logger.log(Level.WARNING, "Tried to delete post of non-local Sone: %s", post.getSone());
1145                         return;
1146                 }
1147                 post.getSone().removePost(post);
1148                 synchronized (posts) {
1149                         posts.remove(post.getId());
1150                 }
1151                 saveSone(post.getSone());
1152         }
1153
1154         /**
1155          * Creates a new reply.
1156          *
1157          * @param sone
1158          *            The Sone that creates the reply
1159          * @param post
1160          *            The post that this reply refers to
1161          * @param text
1162          *            The text of the reply
1163          * @return The created reply
1164          */
1165         public Reply createReply(Sone sone, Post post, String text) {
1166                 return createReply(sone, post, System.currentTimeMillis(), text);
1167         }
1168
1169         /**
1170          * Creates a new reply.
1171          *
1172          * @param sone
1173          *            The Sone that creates the reply
1174          * @param post
1175          *            The post that this reply refers to
1176          * @param time
1177          *            The time of the reply
1178          * @param text
1179          *            The text of the reply
1180          * @return The created reply
1181          */
1182         public Reply createReply(Sone sone, Post post, long time, String text) {
1183                 if (!isLocalSone(sone)) {
1184                         logger.log(Level.FINE, "Tried to create reply for non-local Sone: %s", sone);
1185                         return null;
1186                 }
1187                 Reply reply = new Reply(sone, post, System.currentTimeMillis(), text);
1188                 synchronized (replies) {
1189                         replies.put(reply.getId(), reply);
1190                 }
1191                 synchronized (newReplies) {
1192                         knownReplies.add(reply.getId());
1193                 }
1194                 sone.addReply(reply);
1195                 saveSone(sone);
1196                 return reply;
1197         }
1198
1199         /**
1200          * Deletes the given reply.
1201          *
1202          * @param reply
1203          *            The reply to delete
1204          */
1205         public void deleteReply(Reply reply) {
1206                 Sone sone = reply.getSone();
1207                 if (!isLocalSone(sone)) {
1208                         logger.log(Level.FINE, "Tried to delete non-local reply: %s", reply);
1209                         return;
1210                 }
1211                 synchronized (replies) {
1212                         replies.remove(reply.getId());
1213                 }
1214                 sone.removeReply(reply);
1215                 saveSone(sone);
1216         }
1217
1218         /**
1219          * Starts the core.
1220          */
1221         public void start() {
1222                 loadConfiguration();
1223         }
1224
1225         /**
1226          * Stops the core.
1227          */
1228         public void stop() {
1229                 synchronized (localSones) {
1230                         for (SoneInserter soneInserter : soneInserters.values()) {
1231                                 soneInserter.stop();
1232                         }
1233                 }
1234                 saveConfiguration();
1235                 stopped = true;
1236         }
1237
1238         //
1239         // PRIVATE METHODS
1240         //
1241
1242         /**
1243          * Loads the configuration.
1244          */
1245         @SuppressWarnings("unchecked")
1246         private void loadConfiguration() {
1247                 /* create options. */
1248                 options.addIntegerOption("InsertionDelay", new DefaultOption<Integer>(60, new OptionWatcher<Integer>() {
1249
1250                         @Override
1251                         public void optionChanged(Option<Integer> option, Integer oldValue, Integer newValue) {
1252                                 SoneInserter.setInsertionDelay(newValue);
1253                         }
1254
1255                 }));
1256                 options.addBooleanOption("SoneRescueMode", new DefaultOption<Boolean>(false));
1257                 options.addBooleanOption("ClearOnNextRestart", new DefaultOption<Boolean>(false));
1258                 options.addBooleanOption("ReallyClearOnNextRestart", new DefaultOption<Boolean>(false));
1259
1260                 /* read options from configuration. */
1261                 options.getBooleanOption("ClearOnNextRestart").set(configuration.getBooleanValue("Option/ClearOnNextRestart").getValue(null));
1262                 options.getBooleanOption("ReallyClearOnNextRestart").set(configuration.getBooleanValue("Option/ReallyClearOnNextRestart").getValue(null));
1263                 boolean clearConfiguration = options.getBooleanOption("ClearOnNextRestart").get() && options.getBooleanOption("ReallyClearOnNextRestart").get();
1264                 options.getBooleanOption("ClearOnNextRestart").set(null);
1265                 options.getBooleanOption("ReallyClearOnNextRestart").set(null);
1266                 if (clearConfiguration) {
1267                         /* stop loading the configuration. */
1268                         return;
1269                 }
1270
1271                 options.getIntegerOption("InsertionDelay").set(configuration.getIntValue("Option/InsertionDelay").getValue(null));
1272                 options.getBooleanOption("SoneRescueMode").set(configuration.getBooleanValue("Option/SoneRescueMode").getValue(null));
1273
1274                 /* load known Sones. */
1275                 int soneCounter = 0;
1276                 while (true) {
1277                         String knownSoneId = configuration.getStringValue("KnownSone/" + soneCounter++ + "/ID").getValue(null);
1278                         if (knownSoneId == null) {
1279                                 break;
1280                         }
1281                         synchronized (newSones) {
1282                                 knownSones.add(knownSoneId);
1283                         }
1284                 }
1285
1286                 /* load known posts. */
1287                 int postCounter = 0;
1288                 while (true) {
1289                         String knownPostId = configuration.getStringValue("KnownPosts/" + postCounter++ + "/ID").getValue(null);
1290                         if (knownPostId == null) {
1291                                 break;
1292                         }
1293                         synchronized (newPosts) {
1294                                 knownPosts.add(knownPostId);
1295                         }
1296                 }
1297
1298                 /* load known replies. */
1299                 int replyCounter = 0;
1300                 while (true) {
1301                         String knownReplyId = configuration.getStringValue("KnownReplies/" + replyCounter++ + "/ID").getValue(null);
1302                         if (knownReplyId == null) {
1303                                 break;
1304                         }
1305                         synchronized (newReplies) {
1306                                 knownReplies.add(knownReplyId);
1307                         }
1308                 }
1309
1310         }
1311
1312         /**
1313          * Saves the current options.
1314          */
1315         private void saveConfiguration() {
1316                 /* store the options first. */
1317                 try {
1318                         configuration.getIntValue("Option/InsertionDelay").setValue(options.getIntegerOption("InsertionDelay").getReal());
1319                         configuration.getBooleanValue("Option/SoneRescueMode").setValue(options.getBooleanOption("SoneRescueMode").getReal());
1320                         configuration.getBooleanValue("Option/ClearOnNextRestart").setValue(options.getBooleanOption("ClearOnNextRestart").getReal());
1321                         configuration.getBooleanValue("Option/ReallyClearOnNextRestart").setValue(options.getBooleanOption("ReallyClearOnNextRestart").getReal());
1322
1323                         /* save known Sones. */
1324                         int soneCounter = 0;
1325                         synchronized (newSones) {
1326                                 for (String knownSoneId : knownSones) {
1327                                         configuration.getStringValue("KnownSone/" + soneCounter++ + "/ID").setValue(knownSoneId);
1328                                 }
1329                                 configuration.getStringValue("KnownSone/" + soneCounter + "/ID").setValue(null);
1330                         }
1331
1332                         /* save known posts. */
1333                         int postCounter = 0;
1334                         synchronized (newPosts) {
1335                                 for (String knownPostId : knownPosts) {
1336                                         configuration.getStringValue("KnownPosts/" + postCounter++ + "/ID").setValue(knownPostId);
1337                                 }
1338                                 configuration.getStringValue("KnownPosts/" + postCounter + "/ID").setValue(null);
1339                         }
1340
1341                         /* save known replies. */
1342                         int replyCounter = 0;
1343                         synchronized (newReplies) {
1344                                 for (String knownReplyId : knownReplies) {
1345                                         configuration.getStringValue("KnownReplies/" + replyCounter++ + "/ID").setValue(knownReplyId);
1346                                 }
1347                                 configuration.getStringValue("KnownReplies/" + replyCounter + "/ID").setValue(null);
1348                         }
1349
1350                 } catch (ConfigurationException ce1) {
1351                         logger.log(Level.SEVERE, "Could not store configuration!", ce1);
1352                 }
1353         }
1354
1355         /**
1356          * Generate a Sone URI from the given URI and latest edition.
1357          *
1358          * @param uriString
1359          *            The URI to derive the Sone URI from
1360          * @return The derived URI
1361          */
1362         private FreenetURI getSoneUri(String uriString) {
1363                 try {
1364                         FreenetURI uri = new FreenetURI(uriString).setDocName("Sone").setMetaString(new String[0]);
1365                         return uri;
1366                 } catch (MalformedURLException mue1) {
1367                         logger.log(Level.WARNING, "Could not create Sone URI from URI: " + uriString, mue1);
1368                         return null;
1369                 }
1370         }
1371
1372         //
1373         // INTERFACE IdentityListener
1374         //
1375
1376         /**
1377          * {@inheritDoc}
1378          */
1379         @Override
1380         public void ownIdentityAdded(OwnIdentity ownIdentity) {
1381                 logger.log(Level.FINEST, "Adding OwnIdentity: " + ownIdentity);
1382                 if (ownIdentity.hasContext("Sone")) {
1383                         addLocalSone(ownIdentity);
1384                 }
1385         }
1386
1387         /**
1388          * {@inheritDoc}
1389          */
1390         @Override
1391         public void ownIdentityRemoved(OwnIdentity ownIdentity) {
1392                 logger.log(Level.FINEST, "Removing OwnIdentity: " + ownIdentity);
1393         }
1394
1395         /**
1396          * {@inheritDoc}
1397          */
1398         @Override
1399         public void identityAdded(Identity identity) {
1400                 logger.log(Level.FINEST, "Adding Identity: " + identity);
1401                 addRemoteSone(identity);
1402         }
1403
1404         /**
1405          * {@inheritDoc}
1406          */
1407         @Override
1408         public void identityUpdated(final Identity identity) {
1409                 new Thread(new Runnable() {
1410
1411                         @Override
1412                         @SuppressWarnings("synthetic-access")
1413                         public void run() {
1414                                 Sone sone = getRemoteSone(identity.getId());
1415                                 soneDownloader.fetchSone(sone);
1416                         }
1417                 }).start();
1418         }
1419
1420         /**
1421          * {@inheritDoc}
1422          */
1423         @Override
1424         public void identityRemoved(Identity identity) {
1425                 /* TODO */
1426         }
1427
1428 }