Convert identity events into EventBus-based events.
[Sone.git] / src / main / java / net / pterodactylus / sone / core / Core.java
index 296d080..82fb4c5 100644 (file)
@@ -1,5 +1,5 @@
 /*
- * Sone - Core.java - Copyright © 2010 David Roden
+ * Sone - Core.java - Copyright © 2010–2012 David Roden
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -19,6 +19,7 @@ package net.pterodactylus.sone.core;
 
 import java.net.MalformedURLException;
 import java.util.ArrayList;
+import java.util.Collection;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.HashSet;
@@ -34,6 +35,18 @@ import java.util.logging.Logger;
 import net.pterodactylus.sone.core.Options.DefaultOption;
 import net.pterodactylus.sone.core.Options.Option;
 import net.pterodactylus.sone.core.Options.OptionWatcher;
+import net.pterodactylus.sone.core.event.ImageInsertFinishedEvent;
+import net.pterodactylus.sone.core.event.MarkPostKnownEvent;
+import net.pterodactylus.sone.core.event.MarkPostReplyKnownEvent;
+import net.pterodactylus.sone.core.event.MarkSoneKnownEvent;
+import net.pterodactylus.sone.core.event.NewPostFoundEvent;
+import net.pterodactylus.sone.core.event.NewPostReplyFoundEvent;
+import net.pterodactylus.sone.core.event.NewSoneFoundEvent;
+import net.pterodactylus.sone.core.event.PostRemovedEvent;
+import net.pterodactylus.sone.core.event.PostReplyRemovedEvent;
+import net.pterodactylus.sone.core.event.SoneLockedEvent;
+import net.pterodactylus.sone.core.event.SoneRemovedEvent;
+import net.pterodactylus.sone.core.event.SoneUnlockedEvent;
 import net.pterodactylus.sone.data.Album;
 import net.pterodactylus.sone.data.Client;
 import net.pterodactylus.sone.data.Image;
@@ -46,26 +59,36 @@ import net.pterodactylus.sone.data.Sone;
 import net.pterodactylus.sone.data.Sone.ShowCustomAvatars;
 import net.pterodactylus.sone.data.Sone.SoneStatus;
 import net.pterodactylus.sone.data.TemporaryImage;
+import net.pterodactylus.sone.data.impl.PostImpl;
 import net.pterodactylus.sone.fcp.FcpInterface;
 import net.pterodactylus.sone.fcp.FcpInterface.FullAccessRequired;
 import net.pterodactylus.sone.freenet.wot.Identity;
-import net.pterodactylus.sone.freenet.wot.IdentityListener;
 import net.pterodactylus.sone.freenet.wot.IdentityManager;
 import net.pterodactylus.sone.freenet.wot.OwnIdentity;
-import net.pterodactylus.sone.freenet.wot.Trust;
-import net.pterodactylus.sone.freenet.wot.WebOfTrustException;
+import net.pterodactylus.sone.freenet.wot.event.IdentityAddedEvent;
+import net.pterodactylus.sone.freenet.wot.event.IdentityRemovedEvent;
+import net.pterodactylus.sone.freenet.wot.event.IdentityUpdatedEvent;
+import net.pterodactylus.sone.freenet.wot.event.OwnIdentityAddedEvent;
+import net.pterodactylus.sone.freenet.wot.event.OwnIdentityRemovedEvent;
 import net.pterodactylus.sone.main.SonePlugin;
 import net.pterodactylus.util.config.Configuration;
 import net.pterodactylus.util.config.ConfigurationException;
 import net.pterodactylus.util.logging.Logging;
 import net.pterodactylus.util.number.Numbers;
 import net.pterodactylus.util.service.AbstractService;
+import net.pterodactylus.util.thread.NamedThreadFactory;
 import net.pterodactylus.util.thread.Ticker;
 import net.pterodactylus.util.validation.EqualityValidator;
 import net.pterodactylus.util.validation.IntegerRangeValidator;
 import net.pterodactylus.util.validation.OrValidator;
 import net.pterodactylus.util.validation.Validation;
-import net.pterodactylus.util.version.Version;
+
+import com.google.common.base.Predicate;
+import com.google.common.collect.Collections2;
+import com.google.common.eventbus.EventBus;
+import com.google.common.eventbus.Subscribe;
+import com.google.inject.Inject;
+
 import freenet.keys.FreenetURI;
 
 /**
@@ -73,19 +96,22 @@ import freenet.keys.FreenetURI;
  *
  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  */
-public class Core extends AbstractService implements IdentityListener, UpdateListener, SoneProvider, PostProvider, SoneInsertListener, ImageInsertListener {
+public class Core extends AbstractService implements SoneProvider, PostProvider {
 
        /** The logger. */
        private static final Logger logger = Logging.getLogger(Core.class);
 
+       /** The start time. */
+       private final long startupTime = System.currentTimeMillis();
+
        /** The options. */
        private final Options options = new Options();
 
        /** The preferences. */
        private final Preferences preferences = new Preferences(options);
 
-       /** The core listener manager. */
-       private final CoreListenerManager coreListenerManager = new CoreListenerManager(this);
+       /** The event bus. */
+       private final EventBus eventBus;
 
        /** The configuration. */
        private Configuration configuration;
@@ -106,11 +132,14 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
        private final ImageInserter imageInserter;
 
        /** Sone downloader thread-pool. */
-       private final ExecutorService soneDownloaders = Executors.newFixedThreadPool(10);
+       private final ExecutorService soneDownloaders = Executors.newFixedThreadPool(10, new NamedThreadFactory("Sone Downloader %2$d"));
 
        /** The update checker. */
        private final UpdateChecker updateChecker;
 
+       /** The trust updater. */
+       private final WebOfTrustUpdater webOfTrustUpdater;
+
        /** The FCP interface. */
        private volatile FcpInterface fcpInterface;
 
@@ -122,54 +151,50 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
        private final Set<Sone> lockedSones = new HashSet<Sone>();
 
        /** Sone inserters. */
-       /* synchronize access on this on localSones. */
+       /* synchronize access on this on sones. */
        private final Map<Sone, SoneInserter> soneInserters = new HashMap<Sone, SoneInserter>();
 
        /** Sone rescuers. */
-       /* synchronize access on this on localSones. */
+       /* synchronize access on this on sones. */
        private final Map<Sone, SoneRescuer> soneRescuers = new HashMap<Sone, SoneRescuer>();
 
-       /** All local Sones. */
+       /** All Sones. */
        /* synchronize access on this on itself. */
-       private Map<String, Sone> localSones = new HashMap<String, Sone>();
-
-       /** All remote Sones. */
-       /* synchronize access on this on itself. */
-       private Map<String, Sone> remoteSones = new HashMap<String, Sone>();
+       private final Map<String, Sone> sones = new HashMap<String, Sone>();
 
        /** All known Sones. */
-       private Set<String> knownSones = new HashSet<String>();
+       private final Set<String> knownSones = new HashSet<String>();
 
        /** All posts. */
-       private Map<String, Post> posts = new HashMap<String, Post>();
+       private final Map<String, Post> posts = new HashMap<String, Post>();
 
        /** All known posts. */
-       private Set<String> knownPosts = new HashSet<String>();
+       private final Set<String> knownPosts = new HashSet<String>();
 
        /** All replies. */
-       private Map<String, PostReply> replies = new HashMap<String, PostReply>();
+       private final Map<String, PostReply> replies = new HashMap<String, PostReply>();
 
        /** All known replies. */
-       private Set<String> knownReplies = new HashSet<String>();
+       private final Set<String> knownReplies = new HashSet<String>();
 
        /** All bookmarked posts. */
        /* synchronize access on itself. */
-       private Set<String> bookmarkedPosts = new HashSet<String>();
+       private final Set<String> bookmarkedPosts = new HashSet<String>();
 
        /** Trusted identities, sorted by own identities. */
-       private Map<OwnIdentity, Set<Identity>> trustedIdentities = Collections.synchronizedMap(new HashMap<OwnIdentity, Set<Identity>>());
+       private final Map<OwnIdentity, Set<Identity>> trustedIdentities = Collections.synchronizedMap(new HashMap<OwnIdentity, Set<Identity>>());
 
        /** All known albums. */
-       private Map<String, Album> albums = new HashMap<String, Album>();
+       private final Map<String, Album> albums = new HashMap<String, Album>();
 
        /** All known images. */
-       private Map<String, Image> images = new HashMap<String, Image>();
+       private final Map<String, Image> images = new HashMap<String, Image>();
 
        /** All temporary images. */
-       private Map<String, TemporaryImage> temporaryImages = new HashMap<String, TemporaryImage>();
+       private final Map<String, TemporaryImage> temporaryImages = new HashMap<String, TemporaryImage>();
 
        /** Ticker for threads that mark own elements as known. */
-       private Ticker localElementTicker = new Ticker();
+       private final Ticker localElementTicker = new Ticker();
 
        /** The time the configuration was last touched. */
        private volatile long lastConfigurationUpdate;
@@ -183,46 +208,38 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         *            The freenet interface
         * @param identityManager
         *            The identity manager
+        * @param webOfTrustUpdater
+        *            The WebOfTrust updater
+        * @param eventBus
+        *            The event bus
         */
-       public Core(Configuration configuration, FreenetInterface freenetInterface, IdentityManager identityManager) {
+       @Inject
+       public Core(Configuration configuration, FreenetInterface freenetInterface, IdentityManager identityManager, WebOfTrustUpdater webOfTrustUpdater, EventBus eventBus) {
                super("Sone Core");
                this.configuration = configuration;
                this.freenetInterface = freenetInterface;
                this.identityManager = identityManager;
                this.soneDownloader = new SoneDownloader(this, freenetInterface);
-               this.imageInserter = new ImageInserter(this, freenetInterface);
-               this.updateChecker = new UpdateChecker(freenetInterface);
+               this.imageInserter = new ImageInserter(freenetInterface);
+               this.updateChecker = new UpdateChecker(eventBus, freenetInterface);
+               this.webOfTrustUpdater = webOfTrustUpdater;
+               this.eventBus = eventBus;
        }
 
        //
-       // LISTENER MANAGEMENT
+       // ACCESSORS
        //
 
        /**
-        * Adds a new core listener.
+        * Returns the time Sone was started.
         *
-        * @param coreListener
-        *            The listener to add
+        * @return The startup time (in milliseconds since Jan 1, 1970 UTC)
         */
-       public void addCoreListener(CoreListener coreListener) {
-               coreListenerManager.addListener(coreListener);
+       public long getStartupTime() {
+               return startupTime;
        }
 
        /**
-        * Removes a core listener.
-        *
-        * @param coreListener
-        *            The listener to remove
-        */
-       public void removeCoreListener(CoreListener coreListener) {
-               coreListenerManager.removeListener(coreListener);
-       }
-
-       //
-       // ACCESSORS
-       //
-
-       /**
         * Sets the configuration to use. This will automatically save the current
         * configuration to the given configuration.
         *
@@ -279,8 +296,8 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         * @return The Sone rescuer for the given Sone
         */
        public SoneRescuer getSoneRescuer(Sone sone) {
-               Validation.begin().isNotNull("Sone", sone).check().is("Local Sone", isLocalSone(sone)).check();
-               synchronized (localSones) {
+               Validation.begin().isNotNull("Sone", sone).check().is("Local Sone", sone.isLocal()).check();
+               synchronized (sones) {
                        SoneRescuer soneRescuer = soneRescuers.get(sone);
                        if (soneRescuer == null) {
                                soneRescuer = new SoneRescuer(this, soneDownloader, sone);
@@ -310,10 +327,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         * @return All Sones
         */
        public Set<Sone> getSones() {
-               Set<Sone> allSones = new HashSet<Sone>();
-               allSones.addAll(getLocalSones());
-               allSones.addAll(getRemoteSones());
-               return allSones;
+               return new HashSet<Sone>(sones.values());
        }
 
        /**
@@ -344,10 +358,13 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         */
        @Override
        public Sone getSone(String id, boolean create) {
-               if (isLocalSone(id)) {
-                       return getLocalSone(id);
+               synchronized (sones) {
+                       if (!sones.containsKey(id) && create) {
+                               Sone sone = new Sone(id, false);
+                               sones.put(id, sone);
+                       }
+                       return sones.get(id);
                }
-               return getRemoteSone(id, create);
        }
 
        /**
@@ -359,33 +376,8 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         *         otherwise
         */
        public boolean hasSone(String id) {
-               return isLocalSone(id) || isRemoteSone(id);
-       }
-
-       /**
-        * Returns whether the given Sone is a local Sone.
-        *
-        * @param sone
-        *            The Sone to check for its locality
-        * @return {@code true} if the given Sone is local, {@code false} otherwise
-        */
-       public boolean isLocalSone(Sone sone) {
-               synchronized (localSones) {
-                       return localSones.containsKey(sone.getId());
-               }
-       }
-
-       /**
-        * Returns whether the given ID is the ID of a local Sone.
-        *
-        * @param id
-        *            The Sone ID to check for its locality
-        * @return {@code true} if the given ID is a local Sone, {@code false}
-        *         otherwise
-        */
-       public boolean isLocalSone(String id) {
-               synchronized (localSones) {
-                       return localSones.containsKey(id);
+               synchronized (sones) {
+                       return sones.containsKey(id);
                }
        }
 
@@ -394,21 +386,16 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         *
         * @return All local Sones
         */
-       public Set<Sone> getLocalSones() {
-               synchronized (localSones) {
-                       return new HashSet<Sone>(localSones.values());
-               }
-       }
+       public Collection<Sone> getLocalSones() {
+               synchronized (sones) {
+                       return Collections2.filter(sones.values(), new Predicate<Sone>() {
 
-       /**
-        * Returns the local Sone with the given ID.
-        *
-        * @param id
-        *            The ID of the Sone to get
-        * @return The Sone with the given ID
-        */
-       public Sone getLocalSone(String id) {
-               return getLocalSone(id, true);
+                               @Override
+                               public boolean apply(Sone sone) {
+                                       return sone.isLocal();
+                               }
+                       });
+               }
        }
 
        /**
@@ -422,11 +409,15 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         * @return The Sone with the given ID, or {@code null}
         */
        public Sone getLocalSone(String id, boolean create) {
-               synchronized (localSones) {
-                       Sone sone = localSones.get(id);
+               synchronized (sones) {
+                       Sone sone = sones.get(id);
                        if ((sone == null) && create) {
-                               sone = new Sone(id);
-                               localSones.put(id, sone);
+                               sone = new Sone(id, true);
+                               sones.put(id, sone);
+                       }
+                       if ((sone != null) && !sone.isLocal()) {
+                               sone = new Sone(id, true);
+                               sones.put(id, sone);
                        }
                        return sone;
                }
@@ -437,9 +428,15 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         *
         * @return All remote Sones
         */
-       public Set<Sone> getRemoteSones() {
-               synchronized (remoteSones) {
-                       return new HashSet<Sone>(remoteSones.values());
+       public Collection<Sone> getRemoteSones() {
+               synchronized (sones) {
+                       return Collections2.filter(sones.values(), new Predicate<Sone>() {
+
+                               @Override
+                               public boolean apply(Sone sone) {
+                                       return !sone.isLocal();
+                               }
+                       });
                }
        }
 
@@ -454,45 +451,17 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         * @return The Sone with the given ID
         */
        public Sone getRemoteSone(String id, boolean create) {
-               synchronized (remoteSones) {
-                       Sone sone = remoteSones.get(id);
+               synchronized (sones) {
+                       Sone sone = sones.get(id);
                        if ((sone == null) && create && (id != null) && (id.length() == 43)) {
-                               sone = new Sone(id);
-                               remoteSones.put(id, sone);
+                               sone = new Sone(id, false);
+                               sones.put(id, sone);
                        }
                        return sone;
                }
        }
 
        /**
-        * Returns whether the given Sone is a remote Sone.
-        *
-        * @param sone
-        *            The Sone to check
-        * @return {@code true} if the given Sone is a remote Sone, {@code false}
-        *         otherwise
-        */
-       public boolean isRemoteSone(Sone sone) {
-               synchronized (remoteSones) {
-                       return remoteSones.containsKey(sone.getId());
-               }
-       }
-
-       /**
-        * Returns whether the Sone with the given ID is a remote Sone.
-        *
-        * @param id
-        *            The ID of the Sone to check
-        * @return {@code true} if the Sone with the given ID is a remote Sone,
-        *         {@code false} otherwise
-        */
-       public boolean isRemoteSone(String id) {
-               synchronized (remoteSones) {
-                       return remoteSones.containsKey(id);
-               }
-       }
-
-       /**
         * Returns whether the given Sone has been modified.
         *
         * @param sone
@@ -561,7 +530,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                synchronized (posts) {
                        Post post = posts.get(postId);
                        if ((post == null) && create) {
-                               post = new Post(postId);
+                               post = new PostImpl(postId);
                                posts.put(postId, post);
                        }
                        return post;
@@ -591,18 +560,6 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
 
        /**
         * Returns the reply with the given ID. If there is no reply with the given
-        * ID yet, a new one is created.
-        *
-        * @param replyId
-        *            The ID of the reply to get
-        * @return The reply
-        */
-       public PostReply getReply(String replyId) {
-               return getReply(replyId, true);
-       }
-
-       /**
-        * Returns the reply with the given ID. If there is no reply with the given
         * ID yet, a new one is created, unless {@code create} is false in which
         * case {@code null} is returned.
         *
@@ -613,7 +570,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         *            to return {@code null} if no reply can be found
         * @return The reply, or {@code null} if there is no such reply
         */
-       public PostReply getReply(String replyId, boolean create) {
+       public PostReply getPostReply(String replyId, boolean create) {
                synchronized (replies) {
                        PostReply reply = replies.get(replyId);
                        if (create && (reply == null)) {
@@ -821,7 +778,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
        public void lockSone(Sone sone) {
                synchronized (lockedSones) {
                        if (lockedSones.add(sone)) {
-                               coreListenerManager.fireSoneLocked(sone);
+                               eventBus.post(new SoneLockedEvent(sone));
                        }
                }
        }
@@ -836,7 +793,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
        public void unlockSone(Sone sone) {
                synchronized (lockedSones) {
                        if (lockedSones.remove(sone)) {
-                               coreListenerManager.fireSoneUnlocked(sone);
+                               eventBus.post(new SoneUnlockedEvent(sone));
                        }
                }
        }
@@ -853,21 +810,20 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                        logger.log(Level.WARNING, "Given OwnIdentity is null!");
                        return null;
                }
-               synchronized (localSones) {
+               synchronized (sones) {
                        final Sone sone;
                        try {
-                               sone = getLocalSone(ownIdentity.getId()).setIdentity(ownIdentity).setInsertUri(new FreenetURI(ownIdentity.getInsertUri())).setRequestUri(new FreenetURI(ownIdentity.getRequestUri()));
+                               sone = getLocalSone(ownIdentity.getId(), true).setIdentity(ownIdentity).setInsertUri(new FreenetURI(ownIdentity.getInsertUri())).setRequestUri(new FreenetURI(ownIdentity.getRequestUri()));
                        } catch (MalformedURLException mue1) {
-                               logger.log(Level.SEVERE, "Could not convert the Identity’s URIs to Freenet URIs: " + ownIdentity.getInsertUri() + ", " + ownIdentity.getRequestUri(), mue1);
+                               logger.log(Level.SEVERE, String.format("Could not convert the Identity’s URIs to Freenet URIs: %s, %s", ownIdentity.getInsertUri(), ownIdentity.getRequestUri()), mue1);
                                return null;
                        }
                        sone.setLatestEdition(Numbers.safeParseLong(ownIdentity.getProperty("Sone.LatestEdition"), (long) 0));
                        sone.setClient(new Client("Sone", SonePlugin.VERSION.toString()));
                        sone.setKnown(true);
                        /* TODO - load posts ’n stuff */
-                       localSones.put(ownIdentity.getId(), sone);
-                       final SoneInserter soneInserter = new SoneInserter(this, freenetInterface, sone);
-                       soneInserter.addSoneInsertListener(this);
+                       sones.put(ownIdentity.getId(), sone);
+                       final SoneInserter soneInserter = new SoneInserter(this, eventBus, freenetInterface, sone);
                        soneInserters.put(sone, soneInserter);
                        sone.setStatus(SoneStatus.idle);
                        loadSone(sone);
@@ -884,10 +840,8 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         * @return The created Sone
         */
        public Sone createSone(OwnIdentity ownIdentity) {
-               try {
-                       ownIdentity.addContext("Sone");
-               } catch (WebOfTrustException wote1) {
-                       logger.log(Level.SEVERE, "Could not add “Sone” context to own identity: " + ownIdentity, wote1);
+               if (!webOfTrustUpdater.addContextWait(ownIdentity, "Sone")) {
+                       logger.log(Level.SEVERE, String.format("Could not add “Sone” context to own identity: %s", ownIdentity));
                        return null;
                }
                Sone sone = addLocalSone(ownIdentity);
@@ -915,7 +869,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                        logger.log(Level.WARNING, "Given Identity is null!");
                        return null;
                }
-               synchronized (remoteSones) {
+               synchronized (sones) {
                        final Sone sone = getRemoteSone(identity.getId(), true).setIdentity(identity);
                        boolean newSone = sone.getRequestUri() == null;
                        sone.setRequestUri(getSoneUri(identity.getRequestUri()));
@@ -926,7 +880,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                                }
                                sone.setKnown(!newSone);
                                if (newSone) {
-                                       coreListenerManager.fireNewSoneFound(sone);
+                                       eventBus.post(new NewSoneFoundEvent(sone));
                                        for (Sone localSone : getLocalSones()) {
                                                if (localSone.getOptions().getBooleanOption("AutoFollow").get()) {
                                                        followSone(localSone, sone);
@@ -1038,25 +992,6 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
        }
 
        /**
-        * Retrieves the trust relationship from the origin to the target. If the
-        * trust relationship can not be retrieved, {@code null} is returned.
-        *
-        * @see Identity#getTrust(OwnIdentity)
-        * @param origin
-        *            The origin of the trust tree
-        * @param target
-        *            The target of the trust
-        * @return The trust relationship
-        */
-       public Trust getTrust(Sone origin, Sone target) {
-               if (!isLocalSone(origin)) {
-                       logger.log(Level.WARNING, "Tried to get trust from remote Sone: %s", origin);
-                       return null;
-               }
-               return target.getIdentity().getTrust((OwnIdentity) origin.getIdentity());
-       }
-
-       /**
         * Sets the trust value of the given origin Sone for the target Sone.
         *
         * @param origin
@@ -1068,11 +1003,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         */
        public void setTrust(Sone origin, Sone target, int trustValue) {
                Validation.begin().isNotNull("Trust Origin", origin).check().isInstanceOf("Trust Origin", origin.getIdentity(), OwnIdentity.class).isNotNull("Trust Target", target).isLessOrEqual("Trust Value", trustValue, 100).isGreaterOrEqual("Trust Value", trustValue, -100).check();
-               try {
-                       ((OwnIdentity) origin.getIdentity()).setTrust(target.getIdentity(), trustValue, preferences.getTrustComment());
-               } catch (WebOfTrustException wote1) {
-                       logger.log(Level.WARNING, "Could not set trust for Sone: " + target, wote1);
-               }
+               webOfTrustUpdater.setTrust((OwnIdentity) origin.getIdentity(), target.getIdentity(), trustValue, preferences.getTrustComment());
        }
 
        /**
@@ -1085,11 +1016,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         */
        public void removeTrust(Sone origin, Sone target) {
                Validation.begin().isNotNull("Trust Origin", origin).isNotNull("Trust Target", target).check().isInstanceOf("Trust Origin Identity", origin.getIdentity(), OwnIdentity.class).check();
-               try {
-                       ((OwnIdentity) origin.getIdentity()).removeTrust(target.getIdentity());
-               } catch (WebOfTrustException wote1) {
-                       logger.log(Level.WARNING, "Could not remove trust for Sone: " + target, wote1);
-               }
+               webOfTrustUpdater.setTrust((OwnIdentity) origin.getIdentity(), target.getIdentity(), null, null);
        }
 
        /**
@@ -1153,7 +1080,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                if (hasSone(sone.getId())) {
                        Sone storedSone = getSone(sone.getId());
                        if (!soneRescueMode && !(sone.getTime() > storedSone.getTime())) {
-                               logger.log(Level.FINE, "Downloaded Sone %s is not newer than stored Sone %s.", new Object[] { sone, storedSone });
+                               logger.log(Level.FINE, String.format("Downloaded Sone %s is not newer than stored Sone %s.", sone, storedSone));
                                return;
                        }
                        synchronized (posts) {
@@ -1161,7 +1088,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                                        for (Post post : storedSone.getPosts()) {
                                                posts.remove(post.getId());
                                                if (!sone.getPosts().contains(post)) {
-                                                       coreListenerManager.firePostRemoved(post);
+                                                       eventBus.post(new PostRemovedEvent(post));
                                                }
                                        }
                                }
@@ -1172,9 +1099,9 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                                                if (!storedPosts.contains(post)) {
                                                        if (post.getTime() < getSoneFollowingTime(sone)) {
                                                                knownPosts.add(post.getId());
+                                                               post.setKnown(true);
                                                        } else if (!knownPosts.contains(post.getId())) {
-                                                               sone.setKnown(false);
-                                                               coreListenerManager.fireNewPostFound(post);
+                                                               eventBus.post(new NewPostFoundEvent(post));
                                                        }
                                                }
                                                posts.put(post.getId(), post);
@@ -1186,7 +1113,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                                        for (PostReply reply : storedSone.getReplies()) {
                                                replies.remove(reply.getId());
                                                if (!sone.getReplies().contains(reply)) {
-                                                       coreListenerManager.fireReplyRemoved(reply);
+                                                       eventBus.post(new PostReplyRemovedEvent(reply));
                                                }
                                        }
                                }
@@ -1197,9 +1124,9 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                                                if (!storedReplies.contains(reply)) {
                                                        if (reply.getTime() < getSoneFollowingTime(sone)) {
                                                                knownReplies.add(reply.getId());
+                                                               reply.setKnown(true);
                                                        } else if (!knownReplies.contains(reply.getId())) {
-                                                               reply.setKnown(false);
-                                                               coreListenerManager.fireNewReplyFound(reply);
+                                                               eventBus.post(new NewPostReplyFoundEvent(reply));
                                                        }
                                                }
                                                replies.put(reply.getId(), reply);
@@ -1258,33 +1185,28 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
 
        /**
         * Deletes the given Sone. This will remove the Sone from the
-        * {@link #getLocalSone(String) local Sones}, stops its {@link SoneInserter}
-        * and remove the context from its identity.
+        * {@link #getLocalSones() local Sones}, stop its {@link SoneInserter} and
+        * remove the context from its identity.
         *
         * @param sone
         *            The Sone to delete
         */
        public void deleteSone(Sone sone) {
                if (!(sone.getIdentity() instanceof OwnIdentity)) {
-                       logger.log(Level.WARNING, "Tried to delete Sone of non-own identity: %s", sone);
+                       logger.log(Level.WARNING, String.format("Tried to delete Sone of non-own identity: %s", sone));
                        return;
                }
-               synchronized (localSones) {
-                       if (!localSones.containsKey(sone.getId())) {
-                               logger.log(Level.WARNING, "Tried to delete non-local Sone: %s", sone);
+               synchronized (sones) {
+                       if (!getLocalSones().contains(sone)) {
+                               logger.log(Level.WARNING, String.format("Tried to delete non-local Sone: %s", sone));
                                return;
                        }
-                       localSones.remove(sone.getId());
+                       sones.remove(sone.getId());
                        SoneInserter soneInserter = soneInserters.remove(sone);
-                       soneInserter.removeSoneInsertListener(this);
                        soneInserter.stop();
                }
-               try {
-                       ((OwnIdentity) sone.getIdentity()).removeContext("Sone");
-                       ((OwnIdentity) sone.getIdentity()).removeProperty("Sone.LatestEdition");
-               } catch (WebOfTrustException wote1) {
-                       logger.log(Level.WARNING, "Could not remove context and properties from Sone: " + sone, wote1);
-               }
+               webOfTrustUpdater.removeContext((OwnIdentity) sone.getIdentity(), "Sone");
+               webOfTrustUpdater.removeProperty((OwnIdentity) sone.getIdentity(), "Sone.LatestEdition");
                try {
                        configuration.getLongValue("Sone/" + sone.getId() + "/Time").setValue(null);
                } catch (ConfigurationException ce1) {
@@ -1294,7 +1216,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
 
        /**
         * Marks the given Sone as known. If the Sone was not {@link Post#isKnown()
-        * known} before, a {@link CoreListener#markSoneKnown(Sone)} event is fired.
+        * known} before, a {@link MarkSoneKnownEvent} is fired.
         *
         * @param sone
         *            The Sone to mark as known
@@ -1305,7 +1227,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                        synchronized (knownSones) {
                                knownSones.add(sone.getId());
                        }
-                       coreListenerManager.fireMarkSoneKnown(sone);
+                       eventBus.post(new MarkSoneKnownEvent(sone));
                        touchConfiguration();
                }
        }
@@ -1318,8 +1240,8 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         *            The Sone to load and update
         */
        public void loadSone(Sone sone) {
-               if (!isLocalSone(sone)) {
-                       logger.log(Level.FINE, "Tried to load non-local Sone: %s", sone);
+               if (!sone.isLocal()) {
+                       logger.log(Level.FINE, String.format("Tried to load non-local Sone: %s", sone));
                        return;
                }
 
@@ -1397,7 +1319,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                                logger.log(Level.WARNING, "Invalid reply found, aborting load!");
                                return;
                        }
-                       replies.add(getReply(replyId).setSone(sone).setPost(getPost(postId)).setTime(replyTime).setText(replyText));
+                       replies.add(getPostReply(replyId, true).setSone(sone).setPost(getPost(postId)).setTime(replyTime).setText(replyText));
                }
 
                /* load post likes. */
@@ -1451,12 +1373,14 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                        if (albumParentId != null) {
                                Album parentAlbum = getAlbum(albumParentId, false);
                                if (parentAlbum == null) {
-                                       logger.log(Level.WARNING, "Invalid parent album ID: " + albumParentId);
+                                       logger.log(Level.WARNING, String.format("Invalid parent album ID: %s", albumParentId));
                                        return;
                                }
                                parentAlbum.addAlbum(album);
                        } else {
-                               topLevelAlbums.add(album);
+                               if (!topLevelAlbums.contains(album)) {
+                                       topLevelAlbums.add(album);
+                               }
                        }
                }
 
@@ -1593,18 +1517,19 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         * @return The created post
         */
        public Post createPost(Sone sone, Sone recipient, long time, String text) {
-               if (!isLocalSone(sone)) {
-                       logger.log(Level.FINE, "Tried to create post for non-local Sone: %s", sone);
+               Validation.begin().isNotNull("Text", text).check().isGreater("Text Length", text.length(), 0).check();
+               if (!sone.isLocal()) {
+                       logger.log(Level.FINE, String.format("Tried to create post for non-local Sone: %s", sone));
                        return null;
                }
-               final Post post = new Post(sone, time, text);
+               final Post post = new PostImpl(sone, time, text);
                if (recipient != null) {
                        post.setRecipient(recipient);
                }
                synchronized (posts) {
                        posts.put(post.getId(), post);
                }
-               coreListenerManager.fireNewPostFound(post);
+               eventBus.post(new NewPostFoundEvent(post));
                sone.addPost(post);
                touchConfiguration();
                localElementTicker.registerEvent(System.currentTimeMillis() + 10 * 1000, new Runnable() {
@@ -1627,15 +1552,15 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         *            The post to delete
         */
        public void deletePost(Post post) {
-               if (!isLocalSone(post.getSone())) {
-                       logger.log(Level.WARNING, "Tried to delete post of non-local Sone: %s", post.getSone());
+               if (!post.getSone().isLocal()) {
+                       logger.log(Level.WARNING, String.format("Tried to delete post of non-local Sone: %s", post.getSone()));
                        return;
                }
                post.getSone().removePost(post);
                synchronized (posts) {
                        posts.remove(post.getId());
                }
-               coreListenerManager.firePostRemoved(post);
+               eventBus.post(new PostRemovedEvent(post));
                markPostKnown(post);
                touchConfiguration();
        }
@@ -1650,7 +1575,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
        public void markPostKnown(Post post) {
                post.setKnown(true);
                synchronized (knownPosts) {
-                       coreListenerManager.fireMarkPostKnown(post);
+                       eventBus.post(new MarkPostKnownEvent(post));
                        if (knownPosts.add(post.getId())) {
                                touchConfiguration();
                        }
@@ -1733,8 +1658,9 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         * @return The created reply
         */
        public PostReply createReply(Sone sone, Post post, long time, String text) {
-               if (!isLocalSone(sone)) {
-                       logger.log(Level.FINE, "Tried to create reply for non-local Sone: %s", sone);
+               Validation.begin().isNotNull("Text", text).check().isGreater("Text Length", text.trim().length(), 0).check();
+               if (!sone.isLocal()) {
+                       logger.log(Level.FINE, String.format("Tried to create reply for non-local Sone: %s", sone));
                        return null;
                }
                final PostReply reply = new PostReply(sone, post, System.currentTimeMillis(), text);
@@ -1742,7 +1668,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                        replies.put(reply.getId(), reply);
                }
                synchronized (knownReplies) {
-                       coreListenerManager.fireNewReplyFound(reply);
+                       eventBus.post(new NewPostReplyFoundEvent(reply));
                }
                sone.addReply(reply);
                touchConfiguration();
@@ -1767,8 +1693,8 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         */
        public void deleteReply(PostReply reply) {
                Sone sone = reply.getSone();
-               if (!isLocalSone(sone)) {
-                       logger.log(Level.FINE, "Tried to delete non-local reply: %s", reply);
+               if (!sone.isLocal()) {
+                       logger.log(Level.FINE, String.format("Tried to delete non-local reply: %s", reply));
                        return;
                }
                synchronized (replies) {
@@ -1792,7 +1718,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
        public void markReplyKnown(PostReply reply) {
                reply.setKnown(true);
                synchronized (knownReplies) {
-                       coreListenerManager.fireMarkReplyKnown(reply);
+                       eventBus.post(new MarkPostReplyKnownEvent(reply));
                        if (knownReplies.add(reply.getId())) {
                                touchConfiguration();
                        }
@@ -1842,7 +1768,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         *            The album to remove
         */
        public void deleteAlbum(Album album) {
-               Validation.begin().isNotNull("Album", album).check().is("Local Sone", isLocalSone(album.getSone())).check();
+               Validation.begin().isNotNull("Album", album).check().is("Local Sone", album.getSone().isLocal()).check();
                if (!album.isEmpty()) {
                        return;
                }
@@ -1854,7 +1780,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                synchronized (albums) {
                        albums.remove(album.getId());
                }
-               saveSone(album.getSone());
+               touchConfiguration();
        }
 
        /**
@@ -1869,7 +1795,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         * @return The newly created image
         */
        public Image createImage(Sone sone, Album album, TemporaryImage temporaryImage) {
-               Validation.begin().isNotNull("Sone", sone).isNotNull("Album", album).isNotNull("Temporary Image", temporaryImage).check().is("Local Sone", isLocalSone(sone)).check().isEqual("Owner and Album Owner", sone, album.getSone()).check();
+               Validation.begin().isNotNull("Sone", sone).isNotNull("Album", album).isNotNull("Temporary Image", temporaryImage).check().is("Local Sone", sone.isLocal()).check().isEqual("Owner and Album Owner", sone, album.getSone()).check();
                Image image = new Image(temporaryImage.getId()).setSone(sone).setCreationTime(System.currentTimeMillis());
                album.addImage(image);
                synchronized (images) {
@@ -1888,13 +1814,13 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         *            The image to delete
         */
        public void deleteImage(Image image) {
-               Validation.begin().isNotNull("Image", image).check().is("Local Sone", isLocalSone(image.getSone())).check();
+               Validation.begin().isNotNull("Image", image).check().is("Local Sone", image.getSone().isLocal()).check();
                deleteTemporaryImage(image.getId());
                image.getAlbum().removeImage(image);
                synchronized (images) {
                        images.remove(image.getId());
                }
-               saveSone(image.getSone());
+               touchConfiguration();
        }
 
        /**
@@ -1962,8 +1888,10 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
        @Override
        public void serviceStart() {
                loadConfiguration();
-               updateChecker.addUpdateListener(this);
                updateChecker.start();
+               identityManager.start();
+               webOfTrustUpdater.init();
+               webOfTrustUpdater.start();
        }
 
        /**
@@ -1990,15 +1918,17 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         */
        @Override
        public void serviceStop() {
-               synchronized (localSones) {
-                       for (SoneInserter soneInserter : soneInserters.values()) {
-                               soneInserter.removeSoneInsertListener(this);
-                               soneInserter.stop();
+               synchronized (sones) {
+                       for (Entry<Sone, SoneInserter> soneInserter : soneInserters.entrySet()) {
+                               soneInserter.getValue().stop();
+                               saveSone(soneInserter.getKey());
                        }
                }
+               saveConfiguration();
+               webOfTrustUpdater.stop();
                updateChecker.stop();
-               updateChecker.removeUpdateListener(this);
                soneDownloader.stop();
+               identityManager.stop();
        }
 
        //
@@ -2013,16 +1943,16 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         *            The Sone to save
         */
        private synchronized void saveSone(Sone sone) {
-               if (!isLocalSone(sone)) {
-                       logger.log(Level.FINE, "Tried to save non-local Sone: %s", sone);
+               if (!sone.isLocal()) {
+                       logger.log(Level.FINE, String.format("Tried to save non-local Sone: %s", sone));
                        return;
                }
                if (!(sone.getIdentity() instanceof OwnIdentity)) {
-                       logger.log(Level.WARNING, "Local Sone without OwnIdentity found, refusing to save: %s", sone);
+                       logger.log(Level.WARNING, String.format("Local Sone without OwnIdentity found, refusing to save: %s", sone));
                        return;
                }
 
-               logger.log(Level.INFO, "Saving Sone: %s", sone);
+               logger.log(Level.INFO, String.format("Saving Sone: %s", sone));
                try {
                        /* save Sone into configuration. */
                        String sonePrefix = "Sone/" + sone.getId();
@@ -2135,13 +2065,11 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
 
                        configuration.save();
 
-                       ((OwnIdentity) sone.getIdentity()).setProperty("Sone.LatestEdition", String.valueOf(sone.getLatestEdition()));
+                       webOfTrustUpdater.setProperty((OwnIdentity) sone.getIdentity(), "Sone.LatestEdition", String.valueOf(sone.getLatestEdition()));
 
-                       logger.log(Level.INFO, "Sone %s saved.", sone);
+                       logger.log(Level.INFO, String.format("Sone %s saved.", sone));
                } catch (ConfigurationException ce1) {
-                       logger.log(Level.WARNING, "Could not save Sone: " + sone, ce1);
-               } catch (WebOfTrustException wote1) {
-                       logger.log(Level.WARNING, "Could not set WoT property for Sone: " + sone, wote1);
+                       logger.log(Level.WARNING, String.format("Could not save Sone: %s", sone), ce1);
                }
        }
 
@@ -2162,6 +2090,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                        configuration.getIntValue("Option/ConfigurationVersion").setValue(0);
                        configuration.getIntValue("Option/InsertionDelay").setValue(options.getIntegerOption("InsertionDelay").getReal());
                        configuration.getIntValue("Option/PostsPerPage").setValue(options.getIntegerOption("PostsPerPage").getReal());
+                       configuration.getIntValue("Option/ImagesPerPage").setValue(options.getIntegerOption("ImagesPerPage").getReal());
                        configuration.getIntValue("Option/CharactersPerPost").setValue(options.getIntegerOption("CharactersPerPost").getReal());
                        configuration.getIntValue("Option/PostCutOffLength").setValue(options.getIntegerOption("PostCutOffLength").getReal());
                        configuration.getBooleanValue("Option/RequireFullAccess").setValue(options.getBooleanOption("RequireFullAccess").getReal());
@@ -2170,9 +2099,6 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                        configuration.getStringValue("Option/TrustComment").setValue(options.getStringOption("TrustComment").getReal());
                        configuration.getBooleanValue("Option/ActivateFcpInterface").setValue(options.getBooleanOption("ActivateFcpInterface").getReal());
                        configuration.getIntValue("Option/FcpFullAccessRequired").setValue(options.getIntegerOption("FcpFullAccessRequired").getReal());
-                       configuration.getBooleanValue("Option/SoneRescueMode").setValue(options.getBooleanOption("SoneRescueMode").getReal());
-                       configuration.getBooleanValue("Option/ClearOnNextRestart").setValue(options.getBooleanOption("ClearOnNextRestart").getReal());
-                       configuration.getBooleanValue("Option/ReallyClearOnNextRestart").setValue(options.getBooleanOption("ReallyClearOnNextRestart").getReal());
 
                        /* save known Sones. */
                        int soneCounter = 0;
@@ -2248,6 +2174,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
 
                }));
                options.addIntegerOption("PostsPerPage", new DefaultOption<Integer>(10, new IntegerRangeValidator(1, Integer.MAX_VALUE)));
+               options.addIntegerOption("ImagesPerPage", new DefaultOption<Integer>(9, new IntegerRangeValidator(1, Integer.MAX_VALUE)));
                options.addIntegerOption("CharactersPerPost", new DefaultOption<Integer>(400, new OrValidator<Integer>(new IntegerRangeValidator(50, Integer.MAX_VALUE), new EqualityValidator<Integer>(-1))));
                options.addIntegerOption("PostCutOffLength", new DefaultOption<Integer>(200, new OrValidator<Integer>(new IntegerRangeValidator(50, Integer.MAX_VALUE), new EqualityValidator<Integer>(-1))));
                options.addBooleanOption("RequireFullAccess", new DefaultOption<Boolean>(false));
@@ -2271,23 +2198,10 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                        }
 
                }));
-               options.addBooleanOption("SoneRescueMode", new DefaultOption<Boolean>(false));
-               options.addBooleanOption("ClearOnNextRestart", new DefaultOption<Boolean>(false));
-               options.addBooleanOption("ReallyClearOnNextRestart", new DefaultOption<Boolean>(false));
-
-               /* read options from configuration. */
-               options.getBooleanOption("ClearOnNextRestart").set(configuration.getBooleanValue("Option/ClearOnNextRestart").getValue(null));
-               options.getBooleanOption("ReallyClearOnNextRestart").set(configuration.getBooleanValue("Option/ReallyClearOnNextRestart").getValue(null));
-               boolean clearConfiguration = options.getBooleanOption("ClearOnNextRestart").get() && options.getBooleanOption("ReallyClearOnNextRestart").get();
-               options.getBooleanOption("ClearOnNextRestart").set(null);
-               options.getBooleanOption("ReallyClearOnNextRestart").set(null);
-               if (clearConfiguration) {
-                       /* stop loading the configuration. */
-                       return;
-               }
 
                loadConfigurationValue("InsertionDelay");
                loadConfigurationValue("PostsPerPage");
+               loadConfigurationValue("ImagesPerPage");
                loadConfigurationValue("CharactersPerPost");
                loadConfigurationValue("PostCutOffLength");
                options.getBooleanOption("RequireFullAccess").set(configuration.getBooleanValue("Option/RequireFullAccess").getValue(null));
@@ -2296,7 +2210,6 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                options.getStringOption("TrustComment").set(configuration.getStringValue("Option/TrustComment").getValue(null));
                options.getBooleanOption("ActivateFcpInterface").set(configuration.getBooleanValue("Option/ActivateFcpInterface").getValue(null));
                options.getIntegerOption("FcpFullAccessRequired").set(configuration.getIntValue("Option/FcpFullAccessRequired").getValue(null));
-               options.getBooleanOption("SoneRescueMode").set(configuration.getBooleanValue("Option/SoneRescueMode").getValue(null));
 
                /* load known Sones. */
                int soneCounter = 0;
@@ -2378,7 +2291,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                try {
                        options.getIntegerOption(optionName).set(configuration.getIntValue("Option/" + optionName).getValue(null));
                } catch (IllegalArgumentException iae1) {
-                       logger.log(Level.WARNING, "Invalid value for " + optionName + " in configuration, using default.");
+                       logger.log(Level.WARNING, String.format("Invalid value for %s in configuration, using default.", optionName));
                }
        }
 
@@ -2389,26 +2302,26 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         *            The URI to derive the Sone URI from
         * @return The derived URI
         */
-       private FreenetURI getSoneUri(String uriString) {
+       private static FreenetURI getSoneUri(String uriString) {
                try {
                        FreenetURI uri = new FreenetURI(uriString).setDocName("Sone").setMetaString(new String[0]);
                        return uri;
                } catch (MalformedURLException mue1) {
-                       logger.log(Level.WARNING, "Could not create Sone URI from URI: " + uriString, mue1);
+                       logger.log(Level.WARNING, String.format("Could not create Sone URI from URI: %s", uriString), mue1);
                        return null;
                }
        }
 
-       //
-       // INTERFACE IdentityListener
-       //
-
        /**
-        * {@inheritDoc}
+        * Notifies the core that a new {@link OwnIdentity} was added.
+        *
+        * @param ownIdentityAddedEvent
+        *            The event
         */
-       @Override
-       public void ownIdentityAdded(OwnIdentity ownIdentity) {
-               logger.log(Level.FINEST, "Adding OwnIdentity: " + ownIdentity);
+       @Subscribe
+       public void ownIdentityAdded(OwnIdentityAddedEvent ownIdentityAddedEvent) {
+               OwnIdentity ownIdentity = ownIdentityAddedEvent.ownIdentity();
+               logger.log(Level.FINEST, String.format("Adding OwnIdentity: %s", ownIdentity));
                if (ownIdentity.hasContext("Sone")) {
                        trustedIdentities.put(ownIdentity, Collections.synchronizedSet(new HashSet<Identity>()));
                        addLocalSone(ownIdentity);
@@ -2416,30 +2329,42 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
        }
 
        /**
-        * {@inheritDoc}
+        * Notifies the core that an {@link OwnIdentity} was removed.
+        *
+        * @param ownIdentityRemovedEvent
+        *            The event
         */
-       @Override
-       public void ownIdentityRemoved(OwnIdentity ownIdentity) {
-               logger.log(Level.FINEST, "Removing OwnIdentity: " + ownIdentity);
+       @Subscribe
+       public void ownIdentityRemoved(OwnIdentityRemovedEvent ownIdentityRemovedEvent) {
+               OwnIdentity ownIdentity = ownIdentityRemovedEvent.ownIdentity();
+               logger.log(Level.FINEST, String.format("Removing OwnIdentity: %s", ownIdentity));
                trustedIdentities.remove(ownIdentity);
        }
 
        /**
-        * {@inheritDoc}
+        * Notifies the core that a new {@link Identity} was added.
+        *
+        * @param identityAddedEvent
+        *            The event
         */
-       @Override
-       public void identityAdded(OwnIdentity ownIdentity, Identity identity) {
-               logger.log(Level.FINEST, "Adding Identity: " + identity);
-               trustedIdentities.get(ownIdentity).add(identity);
+       @Subscribe
+       public void identityAdded(IdentityAddedEvent identityAddedEvent) {
+               Identity identity = identityAddedEvent.identity();
+               logger.log(Level.FINEST, String.format("Adding Identity: %s", identity));
+               trustedIdentities.get(identityAddedEvent.ownIdentity()).add(identity);
                addRemoteSone(identity);
        }
 
        /**
-        * {@inheritDoc}
+        * Notifies the core that an {@link Identity} was updated.
+        *
+        * @param identityUpdatedEvent
+        *            The event
         */
-       @Override
-       public void identityUpdated(OwnIdentity ownIdentity, final Identity identity) {
-               new Thread(new Runnable() {
+       @Subscribe
+       public void identityUpdated(IdentityUpdatedEvent identityUpdatedEvent) {
+               final Identity identity = identityUpdatedEvent.identity();
+               soneDownloaders.execute(new Runnable() {
 
                        @Override
                        @SuppressWarnings("synthetic-access")
@@ -2450,14 +2375,19 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                                soneDownloader.addSone(sone);
                                soneDownloader.fetchSone(sone);
                        }
-               }).start();
+               });
        }
 
        /**
-        * {@inheritDoc}
+        * Notifies the core that an {@link Identity} was removed.
+        *
+        * @param identityRemovedEvent
+        *            The event
         */
-       @Override
-       public void identityRemoved(OwnIdentity ownIdentity, Identity identity) {
+       @Subscribe
+       public void identityRemoved(IdentityRemovedEvent identityRemovedEvent) {
+               OwnIdentity ownIdentity = identityRemovedEvent.ownIdentity();
+               Identity identity = identityRemovedEvent.identity();
                trustedIdentities.get(ownIdentity).remove(identity);
                boolean foundIdentity = false;
                for (Entry<OwnIdentity, Set<Identity>> trustedIdentity : trustedIdentities.entrySet()) {
@@ -2481,7 +2411,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                        synchronized (knownPosts) {
                                for (Post post : sone.getPosts()) {
                                        posts.remove(post.getId());
-                                       coreListenerManager.firePostRemoved(post);
+                                       eventBus.post(new PostRemovedEvent(post));
                                }
                        }
                }
@@ -2489,97 +2419,28 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                        synchronized (knownReplies) {
                                for (PostReply reply : sone.getReplies()) {
                                        replies.remove(reply.getId());
-                                       coreListenerManager.fireReplyRemoved(reply);
+                                       eventBus.post(new PostReplyRemovedEvent(reply));
                                }
                        }
                }
-               synchronized (remoteSones) {
-                       remoteSones.remove(identity.getId());
+               synchronized (sones) {
+                       sones.remove(identity.getId());
                }
-               coreListenerManager.fireSoneRemoved(sone);
-       }
-
-       //
-       // INTERFACE UpdateListener
-       //
-
-       /**
-        * {@inheritDoc}
-        */
-       @Override
-       public void updateFound(Version version, long releaseTime, long latestEdition) {
-               coreListenerManager.fireUpdateFound(version, releaseTime, latestEdition);
-       }
-
-       //
-       // INTERFACE ImageInsertListener
-       //
-
-       /**
-        * {@inheritDoc}
-        */
-       @Override
-       public void insertStarted(Sone sone) {
-               coreListenerManager.fireSoneInserting(sone);
-       }
-
-       /**
-        * {@inheritDoc}
-        */
-       @Override
-       public void insertFinished(Sone sone, long insertDuration) {
-               coreListenerManager.fireSoneInserted(sone, insertDuration);
-       }
-
-       /**
-        * {@inheritDoc}
-        */
-       @Override
-       public void insertAborted(Sone sone, Throwable cause) {
-               coreListenerManager.fireSoneInsertAborted(sone, cause);
-       }
-
-       //
-       // SONEINSERTLISTENER METHODS
-       //
-
-       /**
-        * {@inheritDoc}
-        */
-       @Override
-       public void imageInsertStarted(Image image) {
-               logger.log(Level.WARNING, "Image insert started for " + image);
-               coreListenerManager.fireImageInsertStarted(image);
-       }
-
-       /**
-        * {@inheritDoc}
-        */
-       @Override
-       public void imageInsertAborted(Image image) {
-               logger.log(Level.WARNING, "Image insert aborted for " + image);
-               coreListenerManager.fireImageInsertAborted(image);
-       }
-
-       /**
-        * {@inheritDoc}
-        */
-       @Override
-       public void imageInsertFinished(Image image, FreenetURI key) {
-               logger.log(Level.WARNING, "Image insert finished for " + image + ": " + key);
-               image.setKey(key.toString());
-               deleteTemporaryImage(image.getId());
-               saveSone(image.getSone());
-               coreListenerManager.fireImageInsertFinished(image);
+               eventBus.post(new SoneRemovedEvent(sone));
        }
 
        /**
-        * {@inheritDoc}
+        * Deletes the temporary image.
+        *
+        * @param imageInsertFinishedEvent
+        *            The event
         */
-       @Override
-       public void imageInsertFailed(Image image, Throwable cause) {
-               logger.log(Level.WARNING, "Image insert failed for " + image, cause);
-               coreListenerManager.fireImageInsertFailed(image, cause);
+       @Subscribe
+       public void imageInsertFinished(ImageInsertFinishedEvent imageInsertFinishedEvent) {
+               logger.log(Level.WARNING, String.format("Image insert finished for %s: %s", imageInsertFinishedEvent.image(), imageInsertFinishedEvent.resultingUri()));
+               imageInsertFinishedEvent.image().setKey(imageInsertFinishedEvent.resultingUri().toString());
+               deleteTemporaryImage(imageInsertFinishedEvent.image().getId());
+               touchConfiguration();
        }
 
        /**
@@ -2671,6 +2532,39 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                }
 
                /**
+                * Returns the number of images to show per page.
+                *
+                * @return The number of images to show per page
+                */
+               public int getImagesPerPage() {
+                       return options.getIntegerOption("ImagesPerPage").get();
+               }
+
+               /**
+                * Validates the number of images per page.
+                *
+                * @param imagesPerPage
+                *            The number of images per page
+                * @return {@code true} if the number of images per page was valid,
+                *         {@code false} otherwise
+                */
+               public boolean validateImagesPerPage(Integer imagesPerPage) {
+                       return options.getIntegerOption("ImagesPerPage").validate(imagesPerPage);
+               }
+
+               /**
+                * Sets the number of images per page.
+                *
+                * @param imagesPerPage
+                *            The number of images per page
+                * @return This preferences object
+                */
+               public Preferences setImagesPerPage(Integer imagesPerPage) {
+                       options.getIntegerOption("ImagesPerPage").set(imagesPerPage);
+                       return this;
+               }
+
+               /**
                 * Returns the number of characters per post, or <code>-1</code> if the
                 * posts should not be cut off.
                 *
@@ -2901,58 +2795,6 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                        return this;
                }
 
-               /**
-                * Returns whether Sone should clear its settings on the next restart.
-                * In order to be effective, {@link #isReallyClearOnNextRestart()} needs
-                * to return {@code true} as well!
-                *
-                * @return {@code true} if Sone should clear its settings on the next
-                *         restart, {@code false} otherwise
-                */
-               public boolean isClearOnNextRestart() {
-                       return options.getBooleanOption("ClearOnNextRestart").get();
-               }
-
-               /**
-                * Sets whether Sone will clear its settings on the next restart.
-                *
-                * @param clearOnNextRestart
-                *            {@code true} if Sone should clear its settings on the next
-                *            restart, {@code false} otherwise
-                * @return This preferences
-                */
-               public Preferences setClearOnNextRestart(Boolean clearOnNextRestart) {
-                       options.getBooleanOption("ClearOnNextRestart").set(clearOnNextRestart);
-                       return this;
-               }
-
-               /**
-                * Returns whether Sone should really clear its settings on next
-                * restart. This is a confirmation option that needs to be set in
-                * addition to {@link #isClearOnNextRestart()} in order to clear Sone’s
-                * settings on the next restart.
-                *
-                * @return {@code true} if Sone should really clear its settings on the
-                *         next restart, {@code false} otherwise
-                */
-               public boolean isReallyClearOnNextRestart() {
-                       return options.getBooleanOption("ReallyClearOnNextRestart").get();
-               }
-
-               /**
-                * Sets whether Sone should really clear its settings on the next
-                * restart.
-                *
-                * @param reallyClearOnNextRestart
-                *            {@code true} if Sone should really clear its settings on
-                *            the next restart, {@code false} otherwise
-                * @return This preferences
-                */
-               public Preferences setReallyClearOnNextRestart(Boolean reallyClearOnNextRestart) {
-                       options.getBooleanOption("ReallyClearOnNextRestart").set(reallyClearOnNextRestart);
-                       return this;
-               }
-
        }
 
 }