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 List<Node> nodes = Collections.synchronizedList(new ArrayList<Node>());
75 /** Map from node ID to node. */
76 private Map<String, Node> idNodes = Collections.synchronizedMap(new HashMap<String, Node>());
78 /** All FCP connections. */
79 private Map<Node, HighLevelClient> nodeClients = Collections.synchronizedMap(new HashMap<Node, HighLevelClient>());
81 /** Maps nodes to high-level clients. */
82 private Map<HighLevelClient, Node> clientNodes = Collections.synchronizedMap(new HashMap<HighLevelClient, Node>());
85 * Creates a new FCP collector.
88 * The name of the FCP client
90 * The directory in which to store the nodes
92 public NodeManager(String clientName, String directory) {
93 this.clientName = clientName;
94 this.directory = directory;
102 * Adds the given listener to the list of listeners.
104 * @param nodeListener
105 * The listener to add
107 public void addNodeListener(NodeListener nodeListener) {
108 nodeListenerSupport.addListener(nodeListener);
112 * Removes the given listener from the list of listeners.
114 * @param nodeListener
115 * The listener to remove
117 public void removeNodeListener(NodeListener nodeListener) {
118 nodeListenerSupport.removeListener(nodeListener);
126 * Returns the directory in which the nodes are stored.
128 * @return The directory the nodes are stored in
130 public String getDirectory() {
135 * Checks whether the given node is already connected.
139 * @return <code>true</code> if the node is already connected,
140 * <code>false</code> otherwise
142 public boolean hasNode(Node node) {
143 return nodes.contains(node);
149 public Iterator<Node> iterator() {
150 return nodes.iterator();
160 * @throws IOException
161 * if an I/O error occurs loading the nodes
163 public void load() throws IOException {
164 logger.log(Level.FINEST, "load()");
165 File directoryFile = new File(directory);
166 File nodeFile = new File(directoryFile, "nodes.properties");
167 if (!nodeFile.exists() || !nodeFile.isFile() || !nodeFile.canRead()) {
170 Properties nodeProperties = new Properties();
171 InputStream nodeInputStream = null;
173 nodeInputStream = new FileInputStream(nodeFile);
174 nodeProperties.load(nodeInputStream);
176 Closer.close(nodeInputStream);
179 List<Node> loadedNodes = new ArrayList<Node>();
180 while (nodeProperties.containsKey("nodes." + ++nodeIndex + ".name")) {
181 String nodePrefix = "nodes." + nodeIndex;
182 String nodeId = nodeProperties.getProperty(nodePrefix + ".id");
183 if (nodeId == null) {
184 nodeId = Hex.toHex(IdGenerator.generateId());
186 String nodeName = nodeProperties.getProperty(nodePrefix + ".name");
187 if (!Verifier.verifyNodeName(nodeName)) {
188 logger.log(Level.WARNING, "invalid node name “" + nodeName + "”, skipping…");
191 String nodeHostname = nodeProperties.getProperty(nodePrefix + ".hostname");
192 if (!Verifier.verifyHostname(nodeHostname)) {
193 logger.log(Level.WARNING, "invalid host name “" + nodeHostname + "”");
194 /* not fatal, might be valid later on. */
196 String nodePortString = nodeProperties.getProperty(nodePrefix + ".port");
197 if (!Verifier.verifyPort(nodePortString)) {
198 logger.log(Level.WARNING, "invalid port number “" + nodePortString + "”, skipping…");
203 nodePort = Integer.valueOf(nodePortString);
204 } catch (NumberFormatException nfe1) {
205 /* shouldn't happen, port number was checked before. */
206 logger.log(Level.SEVERE, "invalid port number “" + nodePortString + "”, check failed! skipping…");
209 Node newNode = new Node();
210 newNode.setId(nodeId);
211 newNode.setName(nodeName);
212 newNode.setHostname(nodeHostname);
213 newNode.setPort(nodePort);
214 loadedNodes.add(newNode);
216 logger.log(Level.FINE, "loaded " + loadedNodes.size() + " nodes from config");
217 synchronized (syncObject) {
219 for (Node node : loadedNodes) {
226 * Saves all configured nodes.
228 * @throws IOException
229 * if an I/O error occurs saving the nodes
231 public void save() throws IOException {
232 logger.log(Level.FINEST, "save()");
233 File directoryFile = new File(directory);
234 if (!directoryFile.exists()) {
235 if (!directoryFile.mkdirs()) {
236 throw new IOException("could not create directory: " + directory);
239 Properties nodeProperties = new Properties();
241 for (Node node : nodes) {
242 String nodePrefix = "nodes." + ++nodeIndex;
243 nodeProperties.setProperty(nodePrefix + ".id", node.getId());
244 nodeProperties.setProperty(nodePrefix + ".name", node.getName());
245 nodeProperties.setProperty(nodePrefix + ".hostname", node.getHostname());
246 nodeProperties.setProperty(nodePrefix + ".port", String.valueOf(node.getPort()));
248 File projectFile = new File(directoryFile, "nodes.properties");
249 OutputStream nodeOutputStream = null;
251 nodeOutputStream = new FileOutputStream(projectFile);
252 nodeProperties.store(nodeOutputStream, "jSite nodes");
254 Closer.close(nodeOutputStream);
259 * Adds the given node to this manager.
261 * @see #connect(Node)
263 * The node to connect to
264 * @return <code>true</code> if the node was added, <code>false</code> if
265 * the node was not added because it was already known
267 public boolean addNode(Node node) {
268 logger.log(Level.FINEST, "addNode(node=" + node + ")");
269 if (nodes.contains(node)) {
270 logger.log(Level.WARNING, "was told to add already known node: " + node);
273 node.addPropertyChangeListener(this);
274 HighLevelClient highLevelClient = new HighLevelClient(clientName);
276 idNodes.put(node.getId(), node);
277 clientNodes.put(highLevelClient, node);
278 nodeClients.put(node, highLevelClient);
279 highLevelClient.addHighLevelClientListener(this);
280 nodeListenerSupport.fireNodeAdded(node);
285 * Removes the given node from the node manager, disconnecting it if it is
286 * currently connected.
291 public void removeNode(Node node) {
292 logger.log(Level.FINEST, "removeNode(node=" + node + ")");
293 synchronized (syncObject) {
294 if (!nodes.contains(node)) {
297 if (nodeClients.containsKey(node)) {
301 idNodes.remove(node.getId());
302 node.removePropertyChangeListener(this);
303 nodeListenerSupport.fireNodeRemoved(node);
308 * Tries to establish a connection with the given node.
311 * The node to connect to
313 public void connect(Node node) {
314 logger.log(Level.FINEST, "connect(node=" + node + ")");
315 HighLevelClient highLevelClient;
316 highLevelClient = nodeClients.get(node);
317 if (highLevelClient == null) {
318 logger.log(Level.WARNING, "was told to connect to unknown node: " + node);
322 highLevelClient.connect(node.getHostname(), node.getPort());
323 } catch (UnknownHostException uhe1) {
324 nodeListenerSupport.fireNodeConnectionFailed(node, uhe1);
325 } catch (IOException ioe1) {
326 nodeListenerSupport.fireNodeConnectionFailed(node, ioe1);
331 * Disconnects the given node without removing it.
334 * The node to disconnect
336 public void disconnect(Node node) {
337 logger.log(Level.FINEST, "disconnect(node=" + node + ")");
338 synchronized (syncObject) {
339 if (!nodes.contains(node)) {
342 HighLevelClient highLevelClient = nodeClients.get(node);
343 highLevelClient.disconnect();
348 * Returns a list of all nodes.
350 * @return A list of all nodes
352 public List<Node> getNodes() {
353 return Collections.unmodifiableList(nodes);
357 * Returns the high-level client for a given node.
360 * The node to get a high-level client for
361 * @return The high-level client for a node, or <code>null</code> if the
362 * node was disconnected or removed
364 public HighLevelClient getHighLevelClient(Node node) {
365 return nodeClients.get(node);
369 * Returns the node for a high-level client.
371 * @param highLevelClient
372 * The high-level client to get the node for
373 * @return The node for the high-level client, or <code>null</code> if the
374 * high-level client is not known
376 public Node getNode(HighLevelClient highLevelClient) {
377 return clientNodes.get(highLevelClient);
381 * Returns the node identified by the given ID.
385 * @return The node with the given ID, or <code>null</code> if no such node
388 Node getNode(String id) {
389 return idNodes.get(id);
393 * Generates a new SSK key pair.
395 * @return An array with the private key at index <code>0</code> and the
396 * public key at index <code>1</code>
397 * @throws IOException
398 * if an I/O error occurs communicating with the node
399 * @throws JSiteException
400 * if there is a problem with the node
402 public String[] generateKeyPair() throws IOException, JSiteException {
403 logger.log(Level.FINEST, "generateKeyPair()");
404 if (nodes.isEmpty()) {
405 throw new NoNodeException("no node configured");
407 Node node = nodes.get(0);
408 HighLevelClient highLevelClient = nodeClients.get(node);
410 KeyGenerationResult keyGenerationResult = highLevelClient.generateKey().getResult();
411 return new String[] { keyGenerationResult.getInsertURI(), keyGenerationResult.getRequestURI() };
412 } catch (HighLevelException hle1) {
413 throw new BackendException(hle1);
414 } catch (InterruptedException e) {
425 // INTERFACE HighLevelClientListener
431 public void clientConnected(HighLevelClient highLevelClient) {
432 logger.log(Level.FINEST, "clientConnected(highLevelClient=" + highLevelClient + ")");
433 Node node = clientNodes.get(highLevelClient);
435 logger.log(Level.WARNING, "got event for unknown client");
438 nodeListenerSupport.fireNodeConnected(node);
444 public void clientDisconnected(HighLevelClient highLevelClient, Throwable throwable) {
445 logger.log(Level.FINEST, "clientDisconnected(highLevelClient=" + highLevelClient + ",throwable=" + throwable + ")");
446 synchronized (syncObject) {
447 Node node = clientNodes.get(highLevelClient);
449 logger.log(Level.WARNING, "got event for unknown client");
452 nodeListenerSupport.fireNodeDisconnected(node, throwable);
457 // INTERFACE PropertyChangeListener
463 public void propertyChange(PropertyChangeEvent propertyChangeEvent) {
464 Object eventSource = propertyChangeEvent.getSource();
465 if (eventSource instanceof Node) {
466 String propertyName = propertyChangeEvent.getPropertyName();
467 if ("hostname".equals(propertyName) || "port".equals(propertyName)) {
468 Node node = (Node) eventSource;
469 HighLevelClient highLevelClient = nodeClients.get(node);
470 if (highLevelClient == null) {
471 logger.log(Level.WARNING, "got property change event for unknown node: " + node);
474 if (highLevelClient.isConnected()) {
475 highLevelClient.disconnect();
477 highLevelClient.connect(node.getHostname(), node.getPort());
478 } catch (UnknownHostException uhe1) {
479 nodeListenerSupport.fireNodeConnectionFailed(node, uhe1);
480 } catch (IOException ioe1) {
481 nodeListenerSupport.fireNodeConnectionFailed(node, ioe1);