2 * jSite2 - FcpCollector.java -
3 * Copyright © 2008 David Roden
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 package net.pterodactylus.jsite.core;
22 import java.beans.PropertyChangeEvent;
23 import java.beans.PropertyChangeListener;
25 import java.io.FileInputStream;
26 import java.io.FileOutputStream;
27 import java.io.IOException;
28 import java.io.InputStream;
29 import java.io.OutputStream;
30 import java.net.UnknownHostException;
31 import java.util.ArrayList;
32 import java.util.Collections;
33 import java.util.HashMap;
34 import java.util.Iterator;
35 import java.util.List;
37 import java.util.Properties;
38 import java.util.logging.Level;
39 import java.util.logging.Logger;
41 import net.pterodactylus.fcp.highlevel.HighLevelClient;
42 import net.pterodactylus.fcp.highlevel.HighLevelClientListener;
43 import net.pterodactylus.fcp.highlevel.HighLevelException;
44 import net.pterodactylus.fcp.highlevel.KeyGenerationResult;
45 import net.pterodactylus.jsite.util.IdGenerator;
46 import net.pterodactylus.util.io.Closer;
47 import net.pterodactylus.util.logging.Logging;
48 import net.pterodactylus.util.number.Hex;
53 * @author David ‘Bombe’ Roden <bombe@freenetproject.org>
55 public class NodeManager implements Iterable<Node>, PropertyChangeListener, HighLevelClientListener {
58 private static final Logger logger = Logging.getLogger(NodeManager.class.getName());
60 /** The FCP client name. */
61 private final String clientName;
63 /** The directory for the configuration. */
64 private final String directory;
66 /** Object used for synchronization. */
67 private final Object syncObject = new Object();
69 /** Node listener support. */
70 private final NodeListenerSupport nodeListenerSupport = new NodeListenerSupport();
73 private final List<Node> nodes = Collections.synchronizedList(new ArrayList<Node>());
75 /** Map from node ID to node. */
76 private final Map<String, Node> idNodes = Collections.synchronizedMap(new HashMap<String, Node>());
78 /** All FCP connections. */
79 private final Map<Node, HighLevelClient> nodeClients = Collections.synchronizedMap(new HashMap<Node, HighLevelClient>());
81 /** Maps nodes to high-level clients. */
82 private final Map<HighLevelClient, Node> clientNodes = Collections.synchronizedMap(new HashMap<HighLevelClient, Node>());
84 /** Collection of currently connected nodes. */
85 private final Set<Node> connectedNodes = Collections.synchronizedSet(new HashSet<Node>());
88 * Creates a new FCP collector.
91 * The name of the FCP client
93 * The directory in which to store the nodes
95 public NodeManager(String clientName, String directory) {
96 this.clientName = clientName;
97 this.directory = directory;
105 * Adds the given listener to the list of listeners.
107 * @param nodeListener
108 * The listener to add
110 public void addNodeListener(NodeListener nodeListener) {
111 nodeListenerSupport.addListener(nodeListener);
115 * Removes the given listener from the list of listeners.
117 * @param nodeListener
118 * The listener to remove
120 public void removeNodeListener(NodeListener nodeListener) {
121 nodeListenerSupport.removeListener(nodeListener);
129 * Returns the directory in which the nodes are stored.
131 * @return The directory the nodes are stored in
133 public String getDirectory() {
138 * Checks whether the given node is already connected.
142 * @return <code>true</code> if the node is already connected,
143 * <code>false</code> otherwise
145 public boolean hasNode(Node node) {
146 return nodes.contains(node);
152 public Iterator<Node> iterator() {
153 return nodes.iterator();
163 * @throws IOException
164 * if an I/O error occurs loading the nodes
166 public void load() throws IOException {
167 logger.log(Level.FINEST, "load()");
168 File directoryFile = new File(directory);
169 File nodeFile = new File(directoryFile, "nodes.properties");
170 if (!nodeFile.exists() || !nodeFile.isFile() || !nodeFile.canRead()) {
173 Properties nodeProperties = new Properties();
174 InputStream nodeInputStream = null;
176 nodeInputStream = new FileInputStream(nodeFile);
177 nodeProperties.load(nodeInputStream);
179 Closer.close(nodeInputStream);
182 List<Node> loadedNodes = new ArrayList<Node>();
183 while (nodeProperties.containsKey("nodes." + ++nodeIndex + ".name")) {
184 String nodePrefix = "nodes." + nodeIndex;
185 String nodeId = nodeProperties.getProperty(nodePrefix + ".id");
186 if (nodeId == null) {
187 nodeId = Hex.toHex(IdGenerator.generateId());
189 String nodeName = nodeProperties.getProperty(nodePrefix + ".name");
190 if (!Verifier.verifyNodeName(nodeName)) {
191 logger.log(Level.WARNING, "invalid node name “" + nodeName + "”, skipping…");
194 String nodeHostname = nodeProperties.getProperty(nodePrefix + ".hostname");
195 if (!Verifier.verifyHostname(nodeHostname)) {
196 logger.log(Level.WARNING, "invalid host name “" + nodeHostname + "”");
197 /* not fatal, might be valid later on. */
199 String nodePortString = nodeProperties.getProperty(nodePrefix + ".port");
200 if (!Verifier.verifyPort(nodePortString)) {
201 logger.log(Level.WARNING, "invalid port number “" + nodePortString + "”, skipping…");
206 nodePort = Integer.valueOf(nodePortString);
207 } catch (NumberFormatException nfe1) {
208 /* shouldn't happen, port number was checked before. */
209 logger.log(Level.SEVERE, "invalid port number “" + nodePortString + "”, check failed! skipping…");
212 Node newNode = new Node();
213 newNode.setId(nodeId);
214 newNode.setName(nodeName);
215 newNode.setHostname(nodeHostname);
216 newNode.setPort(nodePort);
217 loadedNodes.add(newNode);
219 logger.log(Level.FINE, "loaded " + loadedNodes.size() + " nodes from config");
220 synchronized (syncObject) {
222 for (Node node : loadedNodes) {
229 * Saves all configured nodes.
231 * @throws IOException
232 * if an I/O error occurs saving the nodes
234 public void save() throws IOException {
235 logger.log(Level.FINEST, "save()");
236 File directoryFile = new File(directory);
237 if (!directoryFile.exists()) {
238 if (!directoryFile.mkdirs()) {
239 throw new IOException("could not create directory: " + directory);
242 Properties nodeProperties = new Properties();
244 for (Node node : nodes) {
245 String nodePrefix = "nodes." + ++nodeIndex;
246 nodeProperties.setProperty(nodePrefix + ".id", node.getId());
247 nodeProperties.setProperty(nodePrefix + ".name", node.getName());
248 nodeProperties.setProperty(nodePrefix + ".hostname", node.getHostname());
249 nodeProperties.setProperty(nodePrefix + ".port", String.valueOf(node.getPort()));
251 File projectFile = new File(directoryFile, "nodes.properties");
252 OutputStream nodeOutputStream = null;
254 nodeOutputStream = new FileOutputStream(projectFile);
255 nodeProperties.store(nodeOutputStream, "jSite nodes");
257 Closer.close(nodeOutputStream);
262 * Adds the given node to this manager.
264 * @see #connect(Node)
266 * The node to connect to
267 * @return <code>true</code> if the node was added, <code>false</code> if
268 * the node was not added because it was already known
270 public boolean addNode(Node node) {
271 logger.log(Level.FINEST, "addNode(node=" + node + ")");
272 if (nodes.contains(node)) {
273 logger.log(Level.WARNING, "was told to add already known node: " + node);
276 node.addPropertyChangeListener(this);
277 HighLevelClient highLevelClient = new HighLevelClient(clientName);
279 idNodes.put(node.getId(), node);
280 clientNodes.put(highLevelClient, node);
281 nodeClients.put(node, highLevelClient);
282 highLevelClient.addHighLevelClientListener(this);
283 nodeListenerSupport.fireNodeAdded(node);
288 * Removes the given node from the node manager, disconnecting it if it is
289 * currently connected.
294 public void removeNode(Node node) {
295 logger.log(Level.FINEST, "removeNode(node=" + node + ")");
296 synchronized (syncObject) {
297 if (!nodes.contains(node)) {
300 if (nodeClients.containsKey(node)) {
304 idNodes.remove(node.getId());
305 node.removePropertyChangeListener(this);
306 nodeListenerSupport.fireNodeRemoved(node);
311 * Tries to establish a connection with the given node.
314 * The node to connect to
316 public void connect(Node node) {
317 logger.log(Level.FINEST, "connect(node=" + node + ")");
318 HighLevelClient highLevelClient;
319 highLevelClient = nodeClients.get(node);
320 if (highLevelClient == null) {
321 logger.log(Level.WARNING, "was told to connect to unknown node: " + node);
325 highLevelClient.connect(node.getHostname(), node.getPort());
326 } catch (UnknownHostException uhe1) {
327 nodeListenerSupport.fireNodeConnectionFailed(node, uhe1);
328 } catch (IOException ioe1) {
329 nodeListenerSupport.fireNodeConnectionFailed(node, ioe1);
334 * Disconnects the given node without removing it.
337 * The node to disconnect
339 public void disconnect(Node node) {
340 logger.log(Level.FINEST, "disconnect(node=" + node + ")");
341 synchronized (syncObject) {
342 if (!nodes.contains(node)) {
345 HighLevelClient highLevelClient = nodeClients.get(node);
346 highLevelClient.disconnect();
351 * Returns a list of all nodes.
353 * @return A list of all nodes
355 public List<Node> getNodes() {
356 return Collections.unmodifiableList(nodes);
360 * Returns the high-level client for a given node.
363 * The node to get a high-level client for
364 * @return The high-level client for a node, or <code>null</code> if the
365 * node was disconnected or removed
367 public HighLevelClient getHighLevelClient(Node node) {
368 return nodeClients.get(node);
372 * Returns the node for a high-level client.
374 * @param highLevelClient
375 * The high-level client to get the node for
376 * @return The node for the high-level client, or <code>null</code> if the
377 * high-level client is not known
379 public Node getNode(HighLevelClient highLevelClient) {
380 return clientNodes.get(highLevelClient);
384 * Returns the node identified by the given ID.
388 * @return The node with the given ID, or <code>null</code> if no such node
391 Node getNode(String id) {
392 return idNodes.get(id);
396 * Generates a new SSK key pair.
398 * @return An array with the private key at index <code>0</code> and the
399 * public key at index <code>1</code>
400 * @throws IOException
401 * if an I/O error occurs communicating with the node
402 * @throws JSiteException
403 * if there is a problem with the node
405 public String[] generateKeyPair() throws IOException, JSiteException {
406 logger.log(Level.FINEST, "generateKeyPair()");
407 if (nodes.isEmpty()) {
408 throw new NoNodeException("no node configured");
410 Node node = nodes.get(0);
411 HighLevelClient highLevelClient = nodeClients.get(node);
413 KeyGenerationResult keyGenerationResult = highLevelClient.generateKey().getResult();
414 return new String[] { keyGenerationResult.getInsertURI(), keyGenerationResult.getRequestURI() };
415 } catch (HighLevelException hle1) {
416 throw new BackendException(hle1);
417 } catch (InterruptedException e) {
428 // INTERFACE HighLevelClientListener
434 public void clientConnected(HighLevelClient highLevelClient) {
435 logger.log(Level.FINEST, "clientConnected(highLevelClient=" + highLevelClient + ")");
436 Node node = clientNodes.get(highLevelClient);
438 logger.log(Level.WARNING, "got event for unknown client");
441 nodeListenerSupport.fireNodeConnected(node);
447 public void clientDisconnected(HighLevelClient highLevelClient, Throwable throwable) {
448 logger.log(Level.FINEST, "clientDisconnected(highLevelClient=" + highLevelClient + ",throwable=" + throwable + ")");
449 synchronized (syncObject) {
450 Node node = clientNodes.get(highLevelClient);
452 logger.log(Level.WARNING, "got event for unknown client");
455 nodeListenerSupport.fireNodeDisconnected(node, throwable);
460 // INTERFACE PropertyChangeListener
466 public void propertyChange(PropertyChangeEvent propertyChangeEvent) {
467 Object eventSource = propertyChangeEvent.getSource();
468 if (eventSource instanceof Node) {
469 String propertyName = propertyChangeEvent.getPropertyName();
470 if ("hostname".equals(propertyName) || "port".equals(propertyName)) {
471 Node node = (Node) eventSource;
472 HighLevelClient highLevelClient = nodeClients.get(node);
473 if (highLevelClient == null) {
474 logger.log(Level.WARNING, "got property change event for unknown node: " + node);
477 if (highLevelClient.isConnected()) {
478 highLevelClient.disconnect();
480 highLevelClient.connect(node.getHostname(), node.getPort());
481 } catch (UnknownHostException uhe1) {
482 nodeListenerSupport.fireNodeConnectionFailed(node, uhe1);
483 } catch (IOException ioe1) {
484 nodeListenerSupport.fireNodeConnectionFailed(node, ioe1);