--- /dev/null
+/*
+ * Sone - IdentityManager.java - Copyright © 2010 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.wotns.freenet.wot;
+
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+import java.util.Map.Entry;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import net.pterodactylus.util.collection.SetBuilder;
+import net.pterodactylus.util.logging.Logging;
+import net.pterodactylus.util.service.AbstractService;
+import net.pterodactylus.wotns.freenet.plugin.PluginException;
+
+/**
+ * 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 notifying registered {@link IdentityListener}s 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 IdentityManager extends AbstractService {
+
+ /** Object used for synchronization. */
+ private final Object syncObject = new Object() {
+ /* inner class for better lock names. */
+ };
+
+ /** The logger. */
+ private static final Logger logger = Logging.getLogger(IdentityManager.class);
+
+ /** The event manager. */
+ private final IdentityListenerManager identityListenerManager = new IdentityListenerManager();
+
+ /** The Web of Trust connector. */
+ private final WebOfTrustConnector webOfTrustConnector;
+
+ /** The context to filter for. */
+ private volatile String context;
+
+ /** The currently known own identities. */
+ /* synchronize access on syncObject. */
+ private Map<String, OwnIdentity> currentOwnIdentities = new HashMap<String, OwnIdentity>();
+
+ /** The currently trusted identities. */
+ private Map<OwnIdentity, Set<Identity>> currentTrustedIdentities = new HashMap<OwnIdentity, Set<Identity>>();
+
+ /**
+ * Creates a new identity manager.
+ *
+ * @param webOfTrustConnector
+ * The Web of Trust connector
+ */
+ public IdentityManager(WebOfTrustConnector webOfTrustConnector) {
+ super("Sone Identity Manager", false);
+ this.webOfTrustConnector = webOfTrustConnector;
+ }
+
+ //
+ // LISTENER MANAGEMENT
+ //
+
+ /**
+ * Adds a listener for identity events.
+ *
+ * @param identityListener
+ * The listener to add
+ */
+ public void addIdentityListener(IdentityListener identityListener) {
+ identityListenerManager.addListener(identityListener);
+ }
+
+ /**
+ * Removes a listener for identity events.
+ *
+ * @param identityListener
+ * The listener to remove
+ */
+ public void removeIdentityListener(IdentityListener identityListener) {
+ identityListenerManager.removeListener(identityListener);
+ }
+
+ //
+ // ACCESSORS
+ //
+
+ /**
+ * Sets the context to filter own identities and trusted identities for.
+ *
+ * @param context
+ * The context to filter for, or {@code null} to not filter
+ */
+ public void setContext(String context) {
+ this.context = context;
+ }
+
+ /**
+ * 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
+ */
+ public boolean isConnected() {
+ try {
+ webOfTrustConnector.ping();
+ return true;
+ } catch (PluginException pe1) {
+ /* not connected, ignore. */
+ return false;
+ }
+ }
+
+ /**
+ * Returns the own identity with the given ID.
+ *
+ * @param id
+ * The ID of the own identity
+ * @return The own identity, or {@code null} if there is no such identity
+ */
+ public OwnIdentity getOwnIdentity(String id) {
+ Set<OwnIdentity> allOwnIdentities = getAllOwnIdentities();
+ for (OwnIdentity ownIdentity : allOwnIdentities) {
+ if (ownIdentity.getId().equals(id)) {
+ return ownIdentity;
+ }
+ }
+ return null;
+ }
+
+ /**
+ * Returns all own identities.
+ *
+ * @return All own identities
+ */
+ public Set<OwnIdentity> getAllOwnIdentities() {
+ try {
+ Set<OwnIdentity> ownIdentities = webOfTrustConnector.loadAllOwnIdentities();
+ Map<String, OwnIdentity> newOwnIdentities = new HashMap<String, OwnIdentity>();
+ for (OwnIdentity ownIdentity : ownIdentities) {
+ newOwnIdentities.put(ownIdentity.getId(), ownIdentity);
+ }
+ checkOwnIdentities(newOwnIdentities);
+ return ownIdentities;
+ } catch (WebOfTrustException wote1) {
+ logger.log(Level.WARNING, "Could not load all own identities!", wote1);
+ return Collections.emptySet();
+ }
+ }
+
+ public Set<Identity> getTrustedIdentities(OwnIdentity ownIdentity) {
+ SetBuilder<Identity> identities = new SetBuilder<Identity>();
+ if ((context == null) || ownIdentity.getContexts().contains(context)) {
+ identities.add(ownIdentity);
+ }
+ synchronized (syncObject) {
+ identities.addAll(currentTrustedIdentities.get(ownIdentity));
+ }
+ return identities.get();
+ }
+
+ //
+ // SERVICE METHODS
+ //
+
+ /**
+ * {@inheritDoc}
+ */
+ @Override
+ protected void serviceRun() {
+ Map<OwnIdentity, Map<String, Identity>> oldIdentities = Collections.emptyMap();
+ while (!shouldStop()) {
+ Map<OwnIdentity, Map<String, Identity>> currentIdentities = new HashMap<OwnIdentity, Map<String, Identity>>();
+ @SuppressWarnings("hiding")
+ Map<String, OwnIdentity> currentOwnIdentities = new HashMap<String, OwnIdentity>();
+
+ Set<OwnIdentity> ownIdentities = null;
+ boolean identitiesLoaded = false;
+ try {
+ /* get all identities with the wanted context from WoT. */
+ ownIdentities = webOfTrustConnector.loadAllOwnIdentities();
+
+ /* load trusted identities. */
+ for (OwnIdentity ownIdentity : ownIdentities) {
+ if ((context != null) && !ownIdentity.hasContext(context)) {
+ continue;
+ }
+ currentOwnIdentities.put(ownIdentity.getId(), ownIdentity);
+
+ Set<Identity> trustedIdentities = webOfTrustConnector.loadTrustedIdentities(ownIdentity, context);
+ Map<String, Identity> identities = new HashMap<String, Identity>();
+ currentIdentities.put(ownIdentity, identities);
+ for (Identity identity : trustedIdentities) {
+ identities.put(identity.getId(), identity);
+ }
+ }
+ identitiesLoaded = true;
+ } catch (WebOfTrustException wote1) {
+ logger.log(Level.WARNING, "WoT has disappeared!", wote1);
+ }
+
+ if (identitiesLoaded) {
+
+ /* check for changes. */
+ checkOwnIdentities(currentOwnIdentities);
+
+ /* now check for changes in remote identities. */
+ for (OwnIdentity ownIdentity : currentOwnIdentities.values()) {
+
+ /* find new identities. */
+ for (Identity currentIdentity : currentIdentities.get(ownIdentity).values()) {
+ if (!oldIdentities.containsKey(ownIdentity) || !oldIdentities.get(ownIdentity).containsKey(currentIdentity.getId())) {
+ identityListenerManager.fireIdentityAdded(ownIdentity, currentIdentity);
+ }
+ }
+
+ /* find removed identities. */
+ if (oldIdentities.containsKey(ownIdentity)) {
+ for (Identity oldIdentity : oldIdentities.get(ownIdentity).values()) {
+ if (!currentIdentities.get(ownIdentity).containsKey(oldIdentity.getId())) {
+ identityListenerManager.fireIdentityRemoved(ownIdentity, oldIdentity);
+ }
+ }
+
+ /* check for changes in the contexts. */
+ for (Identity oldIdentity : oldIdentities.get(ownIdentity).values()) {
+ if (!currentIdentities.get(ownIdentity).containsKey(oldIdentity.getId())) {
+ continue;
+ }
+ Identity newIdentity = currentIdentities.get(ownIdentity).get(oldIdentity.getId());
+ Set<String> oldContexts = oldIdentity.getContexts();
+ Set<String> newContexts = newIdentity.getContexts();
+ if (oldContexts.size() != newContexts.size()) {
+ identityListenerManager.fireIdentityUpdated(ownIdentity, newIdentity);
+ continue;
+ }
+ for (String oldContext : oldContexts) {
+ if (!newContexts.contains(oldContext)) {
+ identityListenerManager.fireIdentityUpdated(ownIdentity, newIdentity);
+ break;
+ }
+ }
+ }
+
+ /* check for changes in the properties. */
+ for (Identity oldIdentity : oldIdentities.get(ownIdentity).values()) {
+ if (!currentIdentities.get(ownIdentity).containsKey(oldIdentity.getId())) {
+ continue;
+ }
+ Identity newIdentity = currentIdentities.get(ownIdentity).get(oldIdentity.getId());
+ Map<String, String> oldProperties = oldIdentity.getProperties();
+ Map<String, String> newProperties = newIdentity.getProperties();
+ if (oldProperties.size() != newProperties.size()) {
+ identityListenerManager.fireIdentityUpdated(ownIdentity, newIdentity);
+ continue;
+ }
+ for (Entry<String, String> oldProperty : oldProperties.entrySet()) {
+ if (!newProperties.containsKey(oldProperty.getKey()) || !newProperties.get(oldProperty.getKey()).equals(oldProperty.getValue())) {
+ identityListenerManager.fireIdentityUpdated(ownIdentity, newIdentity);
+ break;
+ }
+ }
+ }
+ }
+ }
+
+ /* remember the current set of identities. */
+ oldIdentities = currentIdentities;
+ synchronized (syncObject) {
+ currentTrustedIdentities.clear();
+ for (Entry<OwnIdentity, Map<String, Identity>> entry : currentIdentities.entrySet()) {
+ Set<Identity> identities = new HashSet<Identity>();
+ currentTrustedIdentities.put(entry.getKey(), identities);
+ for (Identity identity : entry.getValue().values()) {
+ identities.add(identity);
+ }
+ }
+ }
+ }
+
+ /* wait a minute before checking again. */
+ sleep(60 * 1000);
+ }
+ }
+
+ //
+ // PRIVATE METHODS
+ //
+
+ /**
+ * Checks the given new list of own identities for added or removed own
+ * identities, as compared to {@link #currentOwnIdentities}.
+ *
+ * @param newOwnIdentities
+ * The new own identities
+ */
+ private void checkOwnIdentities(Map<String, OwnIdentity> newOwnIdentities) {
+ synchronized (syncObject) {
+
+ /* find removed own identities: */
+ for (OwnIdentity oldOwnIdentity : currentOwnIdentities.values()) {
+ if (!newOwnIdentities.containsKey(oldOwnIdentity.getId())) {
+ identityListenerManager.fireOwnIdentityRemoved(oldOwnIdentity);
+ }
+ }
+
+ /* find added own identities. */
+ for (OwnIdentity currentOwnIdentity : newOwnIdentities.values()) {
+ if (!currentOwnIdentities.containsKey(currentOwnIdentity.getId())) {
+ identityListenerManager.fireOwnIdentityAdded(currentOwnIdentity);
+ }
+ }
+
+ currentOwnIdentities.clear();
+ currentOwnIdentities.putAll(newOwnIdentities);
+ }
+ }
+
+}
projects / WoTNS.git / blobdiff