+/*
+ * 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.sone.freenet.wot;
+
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import net.pterodactylus.sone.freenet.plugin.PluginException;
+import net.pterodactylus.util.logging.Logging;
+import net.pterodactylus.util.service.AbstractService;
+
+import com.google.common.collect.Sets;
+import com.google.common.eventbus.EventBus;
+import com.google.inject.Inject;
+
+/**
+ * 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>
+ */
+public class IdentityManagerImpl extends AbstractService implements IdentityManager {
+
+ /** The logger. */
+ private static final Logger logger = Logging.getLogger(IdentityManagerImpl.class);
+
+ /** The event bus. */
+ private final EventBus eventBus;
+
+ private final IdentityLoader identityLoader;
+
+ /** The Web of Trust connector. */
+ private final WebOfTrustConnector webOfTrustConnector;
+
+ /** The currently known own identities. */
+ private final Set<OwnIdentity> currentOwnIdentities = Sets.newHashSet();
+
+ /**
+ * Creates a new identity manager.
+ *
+ * @param eventBus
+ * The event bus
+ * @param webOfTrustConnector
+ * The Web of Trust connector
+ */
+ @Inject
+ public IdentityManagerImpl(EventBus eventBus, WebOfTrustConnector webOfTrustConnector, IdentityLoader identityLoader) {
+ super("Sone Identity Manager", false);
+ this.eventBus = eventBus;
+ this.webOfTrustConnector = webOfTrustConnector;
+ this.identityLoader = identityLoader;
+ }
+
+ //
+ // ACCESSORS
+ //
+
+ /**
+ * Returns whether the Web of Trust plugin could be reached during the last
+ * try.
+ *
+ * @return {@code true} if the Web of Trust plugin is connected,
+ * {@code false} otherwise
+ */
+ @Override
+ public boolean isConnected() {
+ try {
+ webOfTrustConnector.ping();
+ return true;
+ } catch (PluginException pe1) {
+ /* not connected, ignore. */
+ return false;
+ }
+ }
+
+ /**
+ * Returns all own identities.
+ *
+ * @return All own identities
+ */
+ @Override
+ public Set<OwnIdentity> getAllOwnIdentities() {
+ synchronized (currentOwnIdentities) {
+ return new HashSet<OwnIdentity>(currentOwnIdentities);
+ }
+ }
+
+ //
+ // SERVICE METHODS
+ //
+
+ /**
+ * {@inheritDoc}
+ */
+ @Override
+ protected void serviceRun() {
+ Map<OwnIdentity, Collection<Identity>> oldIdentities = new HashMap<OwnIdentity, Collection<Identity>>();
+
+ while (!shouldStop()) {
+ try {
+ Map<OwnIdentity, Collection<Identity>> currentIdentities = identityLoader.loadIdentities();
+
+ IdentityChangeEventSender identityChangeEventSender = new IdentityChangeEventSender(eventBus, oldIdentities);
+ identityChangeEventSender.detectChanges(currentIdentities);
+
+ oldIdentities = currentIdentities;
+
+ synchronized (currentOwnIdentities) {
+ currentOwnIdentities.clear();
+ currentOwnIdentities.addAll(currentIdentities.keySet());
+ }
+ } catch (WebOfTrustException wote1) {
+ logger.log(Level.WARNING, "WoT has disappeared!", wote1);
+ }
+
+ /* wait a minute before checking again. */
+ sleep(60 * 1000);
+ }
+ }
+
+}