Add Freenet plugin and WoT subprojects

[fwot.git] / wot / src / main / java / net / pterodactylus / freenet / wot / IdentityManagerImpl.java

diff --git a/wot/src/main/java/net/pterodactylus/freenet/wot/IdentityManagerImpl.java b/wot/src/main/java/net/pterodactylus/freenet/wot/IdentityManagerImpl.java
new file mode 100644 (file)
index 0000000..f9adca5
--- /dev/null
+++ b/wot/src/main/java/net/pterodactylus/freenet/wot/IdentityManagerImpl.java
@@ -0,0 +1,120 @@
+/*
+ * Sone - IdentityManager.java - Copyright © 2010–2013 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
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package net.pterodactylus.freenet.wot;
+
+import static java.util.logging.Logger.getLogger;
+
+import java.util.Collection;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicReference;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import javax.inject.Inject;
+import javax.inject.Singleton;
+
+import net.pterodactylus.freenet.plugin.PluginException;
+
+import com.google.common.collect.Maps;
+import com.google.common.collect.Sets;
+import com.google.common.eventbus.EventBus;
+import com.google.common.util.concurrent.AbstractScheduledService;
+
+/**
+ * The identity manager takes care of loading and storing identities, their
+ * contexts, and properties. It does so in a way that does not expose errors via
+ * exceptions but it only logs them and tries to return sensible defaults.
+ * <p>
+ * It is also responsible for polling identities from the Web of Trust plugin
+ * and sending events to the {@link EventBus} when {@link Identity}s and
+ * {@link OwnIdentity}s are discovered or disappearing.
+ *
+ * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
+ */
+@Singleton
+public class IdentityManagerImpl extends AbstractScheduledService implements IdentityManager {
+
+       private static final Logger logger = getLogger("FWoT.Identities");
+
+       private final EventBus eventBus;
+       private final IdentityLoader identityLoader;
+       private final WebOfTrustConnector webOfTrustConnector;
+
+       private final Set<OwnIdentity> currentOwnIdentities = Sets.newHashSet();
+       private final AtomicReference<Map<OwnIdentity, Collection<Identity>>> oldIdentities =
+                       new AtomicReference<>(Maps.newHashMap());
+
+       @Inject
+       public IdentityManagerImpl(EventBus eventBus, WebOfTrustConnector webOfTrustConnector,
+                       IdentityLoader identityLoader) {
+               this.eventBus = eventBus;
+               this.webOfTrustConnector = webOfTrustConnector;
+               this.identityLoader = identityLoader;
+       }
+
+       @Override
+       protected String serviceName() {
+               return "Freenet-WoT Identity Manager";
+       }
+
+       @Override
+       public boolean isConnected() {
+               try {
+                       webOfTrustConnector.ping();
+                       return true;
+               } catch (PluginException pe1) {
+                       /* not connected, ignore. */
+                       return false;
+               }
+       }
+
+       @Override
+       public Set<OwnIdentity> getAllOwnIdentities() {
+               synchronized (currentOwnIdentities) {
+                       return new HashSet<>(currentOwnIdentities);
+               }
+       }
+
+       @Override
+       protected Scheduler scheduler() {
+               return Scheduler.newFixedDelaySchedule(60, 60, TimeUnit.SECONDS);
+       }
+
+       @Override
+       protected void runOneIteration() {
+               try {
+                       Map<OwnIdentity, Collection<Identity>> currentIdentities = identityLoader.loadIdentities();
+
+                       IdentityChangeEventSender identityChangeEventSender =
+                                       new IdentityChangeEventSender(eventBus, oldIdentities.get());
+                       identityChangeEventSender.detectChanges(currentIdentities);
+
+                       synchronized (currentOwnIdentities) {
+                               currentOwnIdentities.clear();
+                               currentOwnIdentities.addAll(currentIdentities.keySet());
+                       }
+                       oldIdentities.set(currentIdentities);
+               } catch (PluginException pe1) {
+                       logger.log(Level.WARNING, "WoT has disappeared!", pe1);
+               }
+       }
+
+}