+/*
+ * Sone - SoneDownloader.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.sone.core;
+
+import java.util.HashSet;
+import java.util.Set;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import net.pterodactylus.sone.data.Sone;
+import net.pterodactylus.util.logging.Logging;
+import net.pterodactylus.util.service.AbstractService;
+import freenet.client.FetchResult;
+
+/**
+ * The Sone downloader is responsible for download Sones as they are updated.
+ *
+ * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
+ */
+public class SoneDownloader extends AbstractService {
+
+ /** The logger. */
+ private static final Logger logger = Logging.getLogger(SoneDownloader.class);
+
+ /** The Freenet interface. */
+ private final FreenetInterface freenetInterface;
+
+ /** The sones to update. */
+ private final Set<Sone> sones = new HashSet<Sone>();
+
+ /**
+ * Creates a new Sone downloader.
+ *
+ * @param freenetInterface
+ * The Freenet interface
+ */
+ public SoneDownloader(FreenetInterface freenetInterface) {
+ super("Sone Downloader");
+ this.freenetInterface = freenetInterface;
+ }
+
+ //
+ // ACTIONS
+ //
+
+ /**
+ * Adds the given Sone to the set of Sones that will be watched for updates.
+ *
+ * @param sone
+ * The Sone to add
+ */
+ public void addSone(Sone sone) {
+ if (sones.add(sone)) {
+ freenetInterface.registerUsk(sone, this);
+ }
+ }
+
+ /**
+ * Fetches the updated Sone. This method is a callback method for
+ * {@link FreenetInterface#registerUsk(Sone, SoneDownloader)}.
+ *
+ * @param sone
+ * The Sone to fetch
+ */
+ public void fetchSone(Sone sone) {
+ logger.log(Level.FINE, "Starting fetch for Sone “%s” from %s…", new Object[] { sone, sone.getRequestUri().setMetaString(new String[] { "sone.xml" }) });
+ FetchResult fetchResult = freenetInterface.fetchUri(sone.getRequestUri().setMetaString(new String[] { "sone.xml" }));
+ logger.log(Level.FINEST, "Got %d bytes back.", fetchResult.size());
+ }
+
+ //
+ // SERVICE METHODS
+ //
+
+ /**
+ * {@inheritDoc}
+ */
+ @Override
+ protected void serviceStop() {
+ for (Sone sone : sones) {
+ freenetInterface.unregisterUsk(sone);
+ }
+ }
+
+}