Mercurial > hg > RemoteEditor > REPSessionManager
annotate rep/SessionManager.java @ 382:4b87f89b3afd
REP Session Manager (Java version)
new structure
| author | one@firefly.cr.ie.u-ryukyu.ac.jp |
|---|---|
| date | Mon, 10 Nov 2008 22:07:45 +0900 |
| parents | c78569ab5fce |
| children | bcdf5476b8e4 |
| rev | line source |
|---|---|
| 266 | 1 |
| 0 | 2 package rep; |
| 3 | |
| 4 import java.io.IOException; | |
| 5 import java.net.InetSocketAddress; | |
| 267 | 6 import java.nio.channels.ClosedChannelException; |
| 0 | 7 import java.nio.channels.SelectionKey; |
| 83 | 8 import java.util.LinkedList; |
| 144 | 9 import java.util.List; |
| 231 | 10 import java.util.Set; |
| 178 | 11 import java.util.concurrent.BlockingQueue; |
| 192 | 12 import java.util.concurrent.LinkedBlockingQueue; |
| 0 | 13 |
| 346 | 14 import org.xml.sax.SAXException; |
| 15 | |
| 198 | 16 |
| 353 | 17 |
| 337 | 18 import rep.channel.REPLogger; |
| 123 | 19 import rep.channel.REPServerSocketChannel; |
| 133 | 20 import rep.channel.REPSocketChannel; |
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21 import rep.gui.CloseButtonEvent; |
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22 import rep.gui.DoGUIUpdate; |
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23 import rep.gui.SelectButtonEvent; |
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24 import rep.gui.SessionManagerEvent; |
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25 import rep.gui.SessionManagerEventListener; |
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26 import rep.gui.SessionManagerGUI; |
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27 import rep.gui.SessionManagerGUIimpl; |
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28 import rep.handler.Dispatcher; |
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29 import rep.handler.Editor; |
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30 import rep.handler.REPNode; |
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31 import rep.handler.FirstConnector; |
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32 import rep.handler.Forwarder; |
| 158 | 33 import rep.channel.REPSelector; |
| 56 | 34 import rep.xml.SessionXMLDecoder; |
| 45 | 35 import rep.xml.SessionXMLEncoder; |
| 198 | 36 import rep.channel.REPSelectionKey; |
| 264 | 37 |
| 198 | 38 /* |
| 264 | 39 +-------+--------+--------+-------+--------+---------+------+ |
| 40 | cmd | session| editor | seqid | lineno | textsiz | text | | |
| 41 | | id | id | | | | | | |
| 42 +-------+--------+--------+-------+--------+---------+------+ | |
| 43 o---------- header section (network order) ----------o | |
| 44 | |
| 45 int cmd; kind of command | |
| 46 int sid; session ID : uniqu to editing file | |
| 47 int eid; editor ID : owner editor ID = 1。Session に対して unique | |
| 308 | 48 -1 session manager command |
| 49 -2 merge command | |
| 264 | 50 int seqno; Sequence number : sequence number はエディタごとに管理 |
| 51 int lineno; line number | |
| 52 int textsize; textsize : bytesize | |
| 53 byte[] text; | |
| 198 | 54 */ |
| 1 | 55 |
| 250 | 56 public class SessionManager implements SessionManagerEventListener{ |
| 337 | 57 static public REPLogger logger = REPLogger.singleton(); |
| 58 | |
| 363 | 59 SessionList sessionList; |
| 280 | 60 private SessionManagerGUI gui; |
| 363 | 61 // Main nio.Selector of this server |
| 198 | 62 private REPSelector<REPCommand> selector; |
| 363 | 63 // Known Session Manager List, At most one parent. No parent means master. |
| 319 | 64 SessionManagerList smList; |
| 363 | 65 // Known Editor list. Connected Editor has a channel. |
| 66 // Session Manager Channel may have dummy editors. | |
| 356 | 67 EditorList editorList; |
| 363 | 68 // Commands for busy editor are kept in this queue. |
| 212 | 69 private List<PacketSet> waitingCommandInMerge; |
| 363 | 70 // Command from gui. Synchronization is required. |
| 71 private BlockingQueue<SessionManagerEvent> waitingEventQueue | |
| 72 = new LinkedBlockingQueue<SessionManagerEvent>();; | |
| 73 // host name of this server. One of connecting SocketChannel's hostname | |
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74 public String myHost; |
| 363 | 75 // Single threaded write queueu. To avoid dead lock with too many writes. |
| 317 | 76 private LinkedList<PacketSet> writeQueue = new LinkedList<PacketSet>(); |
| 336 | 77 private int receive_port; |
| 78 private int parent_port; | |
| 101 | 79 static final int DEFAULT_PORT = 8766; |
| 363 | 80 // Queue limit for debugging purpose. |
| 332 | 81 private static final int packetLimit = 200; |
| 358 | 82 |
| 363 | 83 // globalSessionID = SessionManagerID * MAXID + localSessionID |
| 358 | 84 private static final int MAXID = 10000; |
| 353 | 85 SessionXMLDecoder decoder = new SessionXMLDecoder(); |
| 358 | 86 SessionXMLEncoder encoder = new SessionXMLEncoder(); |
| 363 | 87 // SocketChannel for our parent. At most one parent is allowed. |
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88 private REPNode sm_join_channel; |
| 363 | 89 // Routing table for session and session manager. |
| 369 | 90 private RoutingTable routingTable = new RoutingTable(this); |
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91 private SessionManagerEvent execAfterConnect = null;; |
| 358 | 92 |
| 316 | 93 public static void main(String[] args) throws InterruptedException, IOException { |
| 94 | |
| 95 int port = DEFAULT_PORT; | |
| 96 int port_s = DEFAULT_PORT; | |
| 97 //System.setProperty("file.encoding", "UTF-8"); | |
| 98 if(args.length > 0){ | |
| 363 | 99 if (args.length!=2) { |
| 100 logger.writeLog("Usage: sessionManager our_port parent_port"); | |
| 101 return; | |
| 102 } | |
| 316 | 103 port = Integer.parseInt(args[0]); |
| 104 port_s = Integer.parseInt(args[1]); | |
| 105 } | |
| 106 SessionManager sm = new SessionManager(); | |
| 336 | 107 sm.setReceivePort(port); |
| 108 sm.setParentPort(port_s); | |
| 363 | 109 // Ok start main loop |
| 316 | 110 sm.init(port,new SessionManagerGUIimpl(sm)); |
| 111 } | |
| 112 | |
| 336 | 113 public void setReceivePort(int port) { |
| 114 receive_port = port; | |
| 115 } | |
| 116 | |
| 280 | 117 public void init(int port, SessionManagerGUI gui) throws IOException, InterruptedException { |
| 118 this.gui = gui; | |
| 119 init(port); | |
| 120 mainLoop(); | |
| 121 } | |
| 122 | |
| 123 private void init(int port) throws InterruptedException, IOException { | |
| 363 | 124 selector = REPSelector.<REPCommand>create(); |
| 186 | 125 REPServerSocketChannel<REPCommand> ssc = REPServerSocketChannel.<REPCommand>open(new REPCommandPacker()); |
| 363 | 126 ssc.configureBlocking(false); // Selector requires this |
| 127 ssc.socket().setReuseAddress(true); //reuse address 必須 | |
| 212 | 128 //getAllByNameで取れた全てのアドレスに対してbindする |
| 129 ssc.socket().bind(new InetSocketAddress(port)); | |
| 349 | 130 ssc.register(selector, SelectionKey.OP_ACCEPT, |
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131 new Dispatcher(this)); // FirstConnector? |
| 6 | 132 |
| 358 | 133 sessionList = new SessionList(); |
| 7 | 134 smList = new SessionManagerList(); |
| 356 | 135 editorList = new EditorList(); |
| 212 | 136 waitingCommandInMerge = new LinkedList<PacketSet>(); |
| 228 | 137 |
| 215 | 138 |
| 155 | 139 } |
| 313 | 140 |
| 141 /* | |
| 363 | 142 * The main loop. |
| 143 * Check incoming events and waiting writes. | |
| 144 * Do select and call select() to check in coming packets. | |
| 313 | 145 * We wrote everything in one thread, but we can assign |
| 146 * one thread for each communication channel and GUI event. | |
| 147 */ | |
| 231 | 148 public void mainLoop() throws IOException { |
| 0 | 149 while(true){ |
| 328 | 150 checkWaitingCommandInMerge(); |
| 313 | 151 if (checkInputEvent() || |
| 328 | 152 checkWaitingWrite()) { |
| 313 | 153 // try to do fair execution for waiting task |
| 154 if(selector.selectNow() > 0) select(); | |
| 155 continue; | |
| 300 | 156 } |
| 313 | 157 // now we can wait for input packet or event |
| 233 | 158 selector.select(); |
| 144 | 159 select(); |
| 160 } | |
| 161 } | |
| 162 | |
| 363 | 163 /* |
| 164 * Synchronize GUI event in the main loop. | |
| 165 */ | |
| 313 | 166 private boolean checkInputEvent() { |
| 167 SessionManagerEvent e; | |
| 168 if((e = waitingEventQueue.poll())!=null){ | |
| 334 | 169 e.exec(this); |
| 313 | 170 return true; |
| 171 } | |
| 172 return false; | |
| 173 } | |
| 174 | |
| 363 | 175 /* |
| 176 * Write a packet during the main loop. | |
| 177 */ | |
| 313 | 178 private boolean checkWaitingWrite() throws IOException { |
| 317 | 179 PacketSet p = writeQueue.poll(); |
| 180 if (p!=null) { | |
| 327 | 181 p.channel.write(p.command); |
| 317 | 182 return true; |
| 313 | 183 } |
| 184 return false; | |
| 185 } | |
| 186 | |
| 308 | 187 /** |
| 188 * Check waiting command in merge | |
| 189 * @return true if there is a processed waiting command | |
| 190 * @throws IOException | |
| 191 */ | |
| 346 | 192 private void checkWaitingCommandInMerge() { |
| 328 | 193 List<PacketSet> w = waitingCommandInMerge; |
| 194 waitingCommandInMerge = new LinkedList<PacketSet>(); | |
| 195 for(PacketSet p: w) { | |
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196 REPNode e = p.getEditor(); |
| 353 | 197 if(e.isMerging()) { // still merging do nothing |
| 328 | 198 waitingCommandInMerge.add(p); |
| 199 } else { | |
| 346 | 200 try { |
| 353 | 201 if (sessionManage(e, p.command)) { // we don't need this |
| 202 assert false; | |
| 203 return; | |
| 204 } | |
| 205 e.manage(p.command); | |
| 347 | 206 } catch (Exception e1) { |
| 349 | 207 // should be e.close()? |
| 346 | 208 close(p.channel); |
| 209 } | |
| 328 | 210 } |
| 211 } | |
| 212 } | |
| 363 | 213 |
| 214 /* | |
| 215 * If we have waiting write commands, further sent commands also | |
| 216 * wait to avoid out of order packet sending. | |
| 217 */ | |
| 218 public boolean hasWaitingCommand(REPSocketChannel<REPCommand>c) { | |
| 219 for(PacketSet p:waitingCommandInMerge) { | |
| 220 if (p.channel==c) { | |
| 221 return true; | |
| 222 } | |
| 223 } | |
| 224 return false; | |
| 225 } | |
| 328 | 226 |
| 363 | 227 /* |
| 228 * Close a channel in case of exception or close. | |
| 229 */ | |
| 346 | 230 private void close(REPSocketChannel<REPCommand> channel) { |
| 231 REPSelectionKey<REPCommand>key = channel.keyFor1(selector); | |
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232 REPNode handler = (REPNode)key.attachment(); |
| 346 | 233 key.cancel(); |
| 234 handler.cancel(channel); | |
| 235 // we have to remove session/enditor | |
| 236 } | |
| 237 | |
| 238 | |
| 363 | 239 /* |
| 240 * Do select operation on the Selector. Each key has a forwarder. | |
| 241 * A forwarder can be a firstConnector, a forwarder for Session Manager | |
| 242 * or an Editor. | |
| 243 */ | |
| 144 | 244 private void select() throws IOException { |
| 231 | 245 |
| 246 Set<REPSelectionKey<REPCommand>> keys = selector.selectedKeys1(); | |
| 247 for(REPSelectionKey<REPCommand> key : keys){ | |
| 144 | 248 if(key.isAcceptable()){ |
| 363 | 249 /* |
| 250 * Incoming connection. We don't know which, editor or | |
| 251 * session manager. Assign FirstConnector to distinguish. | |
| 252 */ | |
| 199 | 253 REPSocketChannel<REPCommand> channel = key.accept(new REPCommandPacker()); |
| 337 | 254 logger.writeLog("SessionManager.select() : key.isAcceptable : channel = " + channel); |
| 363 | 255 registerChannel(channel, new FirstConnector(this)); |
| 144 | 256 channel = null; |
| 257 }else if(key.isReadable()){ | |
| 363 | 258 /* |
| 259 * Incoming packets are handled by a various forwarder. | |
| 260 * A hadler throw IOException() in case of a trouble to | |
| 261 * close the channel. | |
| 262 */ | |
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263 REPNode handler = (REPNode)key.attachment(); |
| 267 | 264 try { |
| 265 handler.handle(key); | |
| 358 | 266 } catch (IOException e) { |
| 267 | 267 key.cancel(); |
| 308 | 268 handler.cancel(key.channel1()); |
| 267 | 269 } |
| 0 | 270 } |
| 271 } | |
| 272 } | |
| 1 | 273 |
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274 public void registerChannel(REPSocketChannel<REPCommand> channel,REPNode handler) throws IOException { |
| 2 | 275 if(channel == null) { |
| 276 return; | |
| 277 } | |
| 349 | 278 handler.setChannel(channel); |
| 2 | 279 channel.configureBlocking(false); |
| 355 | 280 channel.register(selector, SelectionKey.OP_READ, handler); |
| 2 | 281 } |
| 282 | |
| 363 | 283 /* |
| 284 * After loop detection, we give up session manager join. | |
| 285 */ | |
| 286 private void cancel_sm_join() { | |
| 364 | 287 logger.writeLog("Loop detected "+this); |
| 355 | 288 removeChannel(sm_join_channel); |
| 289 sm_join_channel=null; | |
| 290 } | |
| 291 | |
| 292 | |
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293 private void removeChannel(REPNode channel) { |
| 363 | 294 REPSelectionKey<REPCommand> key = channel.channel.keyFor1(selector); |
| 355 | 295 key.cancel(); |
| 296 try { | |
| 364 | 297 channel.channel.close1(); |
| 355 | 298 } catch (IOException e) { |
| 299 } | |
| 349 | 300 } |
| 301 | |
| 320 | 302 |
| 319 | 303 void updateGUI() { |
| 212 | 304 //リストのコピーをGUIに渡す |
| 358 | 305 LinkedList<Session> sList = new LinkedList<Session>(sessionList.values()); |
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306 LinkedList<REPNode> eList; |
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307 if (false) { |
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308 // local editor only |
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309 eList = new LinkedList<REPNode>(); |
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310 for(REPNode e:editorList.values()) { |
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311 if (getSMID(e.eid)==smList.sessionManagerID()) { |
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312 eList.add(e); |
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313 } |
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314 } |
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315 } else { |
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316 eList = new LinkedList<REPNode>(editorList.values()); |
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317 } |
| 212 | 318 //GUIに反映 |
| 319 Runnable doRun = new DoGUIUpdate(sList, eList, gui); | |
| 279 | 320 gui.invokeLater(doRun); |
| 212 | 321 } |
| 322 | |
| 83 | 323 |
| 139 | 324 |
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325 public void setMyHostName(String localHostName) { |
| 308 | 326 myHost = localHostName + receive_port; |
| 164 | 327 setHostToEditor(myHost); |
| 328 } | |
| 329 | |
| 330 private void setHostToEditor(String myHost2) { | |
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331 for(REPNode editor : editorList.values()){ |
| 358 | 332 if (editor.channel!=null) |
| 333 editor.setHost(myHost2); | |
| 164 | 334 } |
| 76 | 335 } |
| 0 | 336 |
| 355 | 337 |
| 338 /** | |
| 363 | 339 * GUI から、呼ばれて、Session Managerに接続する。 |
| 355 | 340 * Host 名のSession Manager に SM_JOIN する。自分は、Session を持っていては |
| 341 * ならない。複数のSession Managerにjoinすることは出来ない。(NATを実装するまでは)。 | |
| 342 * @param host | |
| 343 */ | |
| 378 | 344 public void connectSessionManager(String host, int port) { |
| 355 | 345 if (sm_join_channel!=null) return; |
| 346 if (!sessionList.isEmpty()) return; | |
| 347 if (!smList.isMaster()) return; | |
| 363 | 348 /* |
| 349 * IPv6 対応では、複数のアドレスを取って、それのすべてに接続を試す必要が | |
| 350 * ある。 | |
| 351 */ | |
| 1 | 352 InetSocketAddress addr = new InetSocketAddress(host, port); |
| 353 try { | |
| 186 | 354 REPSocketChannel<REPCommand> sessionchannel = REPSocketChannel.<REPCommand>create(new REPCommandPacker()); |
| 1 | 355 sessionchannel.connect(addr); |
| 337 | 356 while(!sessionchannel.finishConnect()); |
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357 REPNode sm = new FirstConnector(this); |
| 355 | 358 registerChannel(sessionchannel, sm); |
| 349 | 359 sm_join(sm); |
| 1 | 360 }catch (IOException e) { |
| 361 } | |
| 362 } | |
| 364 | 363 |
| 378 | 364 public void connectSessionManager(String host) { |
| 365 connectSessionManager(host,parent_port); | |
| 364 | 366 } |
| 77 | 367 |
| 363 | 368 /** |
| 369 * channel に SMCMD_SM_JOIN command を送る。 | |
| 370 * @param channel | |
| 371 */ | |
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372 private void sm_join(REPNode channel){ |
| 355 | 373 sm_join_channel = channel; |
| 122 | 374 //SM_JOINコマンドを生成。 |
| 77 | 375 REPCommand command = new REPCommand(); |
| 376 command.setCMD(REP.SMCMD_SM_JOIN); | |
| 349 | 377 command.setEID(-1); // request Parent SessionManagerID |
| 378 command.setSID(-1); // request SessionManagerID | |
| 79 | 379 |
| 122 | 380 //hostnameをセット。 |
| 349 | 381 setMyHostName(channel.getLocalHostName()); |
| 82 | 382 |
| 355 | 383 String string = myHost; |
| 77 | 384 command.setString(string); |
| 385 | |
| 122 | 386 //SM_JOINコマンドを送信。 |
| 349 | 387 channel.send(command); |
| 363 | 388 // ack を受け取ったら、SessionManagerのListに追加。ここではやらない。 |
| 77 | 389 } |
| 349 | 390 |
| 361 | 391 /* |
| 392 * Select Session from Manager button | |
| 393 * selected editor is joined editor directly connected to this session | |
| 394 * manager. | |
| 395 */ | |
| 316 | 396 public void selectSession(SelectButtonEvent event) throws IOException { |
| 250 | 397 int sid = event.getSID(); |
| 358 | 398 Session session = sessionList.get(sid); |
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399 if (session==null) throw new IOException(); |
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400 REPNode editor = event.getEditor(); |
| 324 | 401 if (editor.hasSession()) return; |
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402 // assert(getSMID(editor.eid)==smList.sessionManagerID()); |
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403 // assert(editor.channel!=null); |
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404 editor.setSID(sid); // mark as selected |
| 372 | 405 selectSession0(sid, session, editor.getEID(), editor); |
| 406 } | |
| 407 | |
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408 private void selectSession0(int sid, Session session, int eid, REPNode editor) { |
| 372 | 409 if (editor.isDirect()&&editor.getEID()==eid) { |
| 410 selectSession(sid, session, editor.getEID(), editor); | |
| 411 } else { | |
| 412 // we don't have this editor, search the editor first. | |
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413 REPNode next = routingTable.toSessionManager(getSMID(eid)); |
| 372 | 414 // pass the select command to the next path. |
| 415 REPCommand command = new REPCommand(); | |
| 416 command.setCMD(REP.SMCMD_SELECT0); | |
| 417 command.setSID(sid); | |
| 418 command.setEID(eid); | |
| 419 command.setString(editor.getHost()); | |
| 420 next.send(command); | |
| 421 } | |
| 358 | 422 } |
| 423 | |
| 361 | 424 /* |
| 425 * Select Session Protocol handler | |
| 363 | 426 * called from GUI or incoming SMCMD_SELECT command. |
| 361 | 427 */ |
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428 private void selectSession(int sid, Session session, int eid, REPNode editor) { |
| 372 | 429 if(session.hasOwner()){ |
| 363 | 430 // we have selected session. |
| 107 | 431 REPCommand sendCommand = new REPCommand(); |
| 358 | 432 if (editor.isDirect()&&editor.getEID()==eid) { |
| 363 | 433 // Found directly connected joined editor. Send join_ack(). |
| 361 | 434 session.addForwarder(editor); |
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435 sendUpdate(session.getSID()); |
| 358 | 436 sendCommand.setCMD(REP.SMCMD_JOIN_ACK); |
| 437 } else { | |
| 363 | 438 // We have a session, but joined editor is on the other sm. |
| 358 | 439 // SELECT_ACK is sent to the session ring to |
| 363 | 440 // find out the joined editor. |
| 358 | 441 sendCommand.setCMD(REP.SMCMD_SELECT_ACK); |
| 442 } | |
| 370 | 443 sendCommand.setSID(sid); |
| 444 sendCommand.string = session.getName(); | |
| 445 sendCommand.setEID(eid); | |
| 446 editor.send(sendCommand); | |
| 107 | 447 }else { |
| 372 | 448 forwardSelect(sid, session, eid, editor); |
| 107 | 449 } |
| 8 | 450 } |
| 122 | 451 |
| 372 | 452 private void forwardSelect(int sid, Session session, int eid, |
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453 REPNode editor) { |
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454 REPNode next; |
| 372 | 455 // session searching continue... |
| 456 next = routingTable.toSessionManager(getSMID(sid)); | |
| 457 // make a forwarding channel here | |
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458 REPNode f = createSessionForwarder(sid, next); |
| 372 | 459 session.setFirstForwarder(f); |
| 460 session.addForwarder(editor); | |
| 461 // pass the select command to the next path. | |
| 462 REPCommand command = new REPCommand(); | |
| 463 command.setCMD(REP.SMCMD_SELECT); | |
| 464 command.setSID(sid); | |
| 465 command.setEID(eid); | |
| 466 command.setString(editor.getHost()); | |
| 467 next.send(command); | |
| 468 } | |
| 469 | |
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470 private REPNode createSessionForwarder(int sid, REPNode editor) { |
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471 REPNode f = new Forwarder(this); |
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472 f.setEID(makeID(editorList.newEid())); |
| 372 | 473 f.setChannel(editor.channel); // incoming channel |
| 474 f.setHost(myHost); | |
| 475 f.setSID(sid); | |
| 476 return f; | |
| 477 } | |
| 478 | |
| 363 | 479 /* |
| 480 * Create and send UPDATE command. | |
| 481 */ | |
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482 private void sendUpdate(int sid) { |
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483 REPCommand command = makeREPCommandWithSessionList(REP.SMCMD_UPDATE); |
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484 command.setSID(sid); |
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485 command.setEID(REP.SM_EID.id); |
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486 smList.sendToMaster(command); |
| 358 | 487 } |
| 488 | |
| 363 | 489 /* |
| 490 * Create new editor in this sessin manager. A dummy editor | |
| 491 * is created also. | |
| 492 */ | |
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493 public REPNode newEditor(REPSocketChannel<REPCommand> channel) { |
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494 int eid = makeID(editorList.newEid()); |
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495 REPNode editor = new Editor(this, eid, channel); |
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496 editorList.add(editor); |
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497 return editor; |
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498 } |
| 363 | 499 |
| 500 /* | |
| 501 * Create new session. | |
| 502 */ | |
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503 public Session newSession(REPNode master) { |
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504 int sid= makeID(sessionList.newSessionID()); |
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505 Session session = new Session(sid, master); |
| 360 | 506 sessionList.put(sid, session); |
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507 return session; |
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508 } |
| 358 | 509 |
| 144 | 510 public void addWaitingCommand(PacketSet set) { |
| 212 | 511 waitingCommandInMerge.add(set); |
| 144 | 512 } |
| 148 | 513 |
| 363 | 514 /* |
| 515 * Synchronize GUI command in this session manager. | |
| 516 */ | |
| 222 | 517 public void buttonPressed(SessionManagerEvent event) { |
| 518 try { | |
| 308 | 519 waitingEventQueue.put(event); |
| 222 | 520 } catch (InterruptedException e) {} |
| 521 selector.wakeup(); | |
| 522 } | |
| 281 | 523 |
| 363 | 524 /* |
| 525 * Execute incoming event during the initialization for | |
| 526 * testing purpose. | |
| 527 */ | |
| 281 | 528 public void syncExec(SessionManagerEvent event) { |
| 529 try { | |
| 308 | 530 waitingEventQueue.put(event); |
| 281 | 531 } catch (InterruptedException e) { |
| 532 } | |
| 533 } | |
| 222 | 534 |
| 363 | 535 /* |
| 536 * GUI command interface for close session. | |
| 537 */ | |
| 259 | 538 public void closeSession(SessionManagerEvent event) { |
| 539 Session session = ((CloseButtonEvent) event).getSession(); | |
| 540 session.closeSession(); | |
| 541 sessionList.remove(session); | |
| 542 updateGUI(); | |
| 543 } | |
| 544 | |
| 363 | 545 /* |
| 546 * Remove editors which has the cannel. | |
| 547 */ | |
| 274 | 548 public void remove(REPSocketChannel<REPCommand> channel) { |
| 358 | 549 int i = 0; |
| 550 for(Session s:sessionList.values()) { | |
| 274 | 551 if (s.deleteEditor(channel)) { |
| 358 | 552 i++; |
| 274 | 553 } |
| 554 } | |
| 358 | 555 assert(i==1); |
| 274 | 556 // can be other session manager? what should I do? |
| 557 } | |
| 558 | |
| 317 | 559 |
| 560 public void addWriteQueue(PacketSet packetSet) { | |
| 324 | 561 writeQueue.addLast(packetSet); |
| 323 | 562 assert(writeQueue.size()<packetLimit) ; |
| 317 | 563 } |
| 564 | |
| 318 | 565 |
| 566 public void remove(Editor editor) { | |
| 358 | 567 Session s = sessionList.get(editor.getSID()); |
| 362 | 568 if (s==null) { |
| 569 assert(false); | |
| 570 editorList.remove(editor); | |
| 571 } else if (editor.isMaster()) { | |
| 358 | 572 removeSession(s); |
| 573 } else { | |
| 574 s.deleteForwarder(editor); | |
| 575 editorList.remove(editor); | |
| 318 | 576 } |
| 341 | 577 updateGUI(); |
| 578 } | |
| 579 | |
| 580 private void removeSession(Session s0) { | |
| 358 | 581 s0.remove(this); |
| 341 | 582 sessionList.remove(s0); |
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583 sendUpdate(s0.getSID()); |
| 318 | 584 } |
| 585 | |
| 334 | 586 public void setParentPort(int port) { |
| 587 parent_port = port; | |
| 588 } | |
| 589 public int getParentPort() { | |
| 590 return parent_port; | |
| 591 } | |
| 592 | |
| 593 public int getPort() { | |
| 594 return receive_port; | |
| 595 } | |
| 596 | |
| 353 | 597 |
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598 public boolean sessionManage(REPNode forwarder, REPCommand command) throws ClosedChannelException, |
| 358 | 599 IOException { |
| 355 | 600 switch(command.cmd){ |
| 353 | 601 |
| 602 // Session Manager Command | |
| 603 | |
| 604 case SMCMD_JOIN: | |
| 605 { | |
| 358 | 606 // first connection or forwarded command |
| 367 | 607 routingTable.add(forwarder,getSMID(command.eid)); |
| 358 | 608 if(isMaster()) { |
| 609 REPCommand ackCommand = new REPCommand(); | |
| 610 ackCommand.setCMD(REP.SMCMD_JOIN_ACK); | |
| 611 ackCommand.setEID(command.eid); | |
| 360 | 612 ackCommand.setSID(command.sid); |
| 358 | 613 ackCommand.string = command.string; |
| 614 smList.sendToSlaves(ackCommand); | |
| 615 registEditor(forwarder,ackCommand); | |
| 616 } else { | |
| 617 smList.sendToMaster(command); | |
| 618 } | |
| 360 | 619 updateGUI(); |
| 353 | 620 } |
| 621 | |
| 622 break; | |
| 623 | |
| 361 | 624 case SMCMD_PUT_ACK: |
| 366 | 625 if (forwarder.isDirect()) { |
| 626 // send put_ack to the editor now. | |
| 627 command.setCMD(REP.SMCMD_PUT_ACK); | |
| 628 command.string = command.string; | |
| 629 command.setEID(command.eid); | |
| 630 command.setSID(command.sid); | |
| 631 forwarder.send(command); | |
| 632 } | |
| 353 | 633 case SMCMD_JOIN_ACK: |
| 358 | 634 registEditor(forwarder,command); |
| 360 | 635 updateGUI(); |
| 353 | 636 break; |
| 637 | |
| 638 case SMCMD_PUT: | |
| 639 { | |
| 358 | 640 // first connection or forwarded command |
| 367 | 641 routingTable.add(forwarder,getSMID(command.eid)); |
| 370 | 642 REPCommand ack = new REPCommand(command); ack.setCMD(REP.SMCMD_PUT_ACK); |
| 643 if(isMaster()) { | |
| 371 | 644 // Reached to the top of the tree, multicast the ack. |
| 370 | 645 smList.sendToSlaves(ack); |
| 646 registEditor(forwarder,ack); | |
| 371 | 647 if (forwarder.isDirect()) { |
| 648 // If put editor on the master, no SMCMD_PUT_ACK is | |
| 649 // generated. Send ack to the editor now. | |
| 650 forwarder.send(ack); | |
| 651 } | |
| 358 | 652 } else { |
| 371 | 653 // Pass this to the master. |
| 358 | 654 smList.sendToMaster(command); |
| 361 | 655 // registEditor will be done by SMCMD_PUT_ACK |
| 656 } | |
| 360 | 657 updateGUI(); |
| 353 | 658 |
| 659 } | |
| 660 break; | |
| 358 | 661 |
| 372 | 662 case SMCMD_SELECT0: |
| 663 /* | |
| 664 * finding joining editor, do not make the path. | |
| 665 */ | |
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666 REPNode editor = editorList.get(command.eid); |
| 372 | 667 if (editor==null|| !editor.isDirect()) { |
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668 REPNode next = routingTable.toSessionManager(getSMID(command.eid)); |
| 372 | 669 next.send(command); |
| 670 break; | |
| 671 } | |
| 672 // we've found the editor, fall thru. | |
| 353 | 673 case SMCMD_SELECT: |
| 361 | 674 { |
| 372 | 675 /* |
| 676 * finding active session ring from joined editor. | |
| 677 */ | |
| 361 | 678 Session session = sessionList.get(command.sid); |
| 679 if (session==null) { | |
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680 session = new Session(command.sid, command.string,null); |
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681 sessionList.put(command.sid,session); |
| 361 | 682 } |
| 372 | 683 // Do not directly addForwarder(forwarder). It may be |
| 684 // shared among sessions. | |
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685 REPNode f = createSessionForwarder(command.sid, forwarder); |
| 372 | 686 session.addForwarder(f); // f.next is set up here. |
| 361 | 687 selectSession(command.sid, session, command.eid, forwarder); |
| 688 } | |
| 689 break; | |
| 353 | 690 case SMCMD_SELECT_ACK: |
| 691 { | |
| 369 | 692 // Sessionが見つかったので、select したeditorに教える。 |
| 358 | 693 Session session = sessionList.get(command.sid); |
| 376 | 694 searchSelectedEditor(command,session.getForwarder(forwarder.channel)); |
| 353 | 695 } |
| 358 | 696 break; |
| 697 | |
| 353 | 698 case SMCMD_SM_JOIN: |
| 699 { | |
| 355 | 700 // SM_JOIN中にSMCMD_SM_JOINが来たら、これはループなので、 |
| 701 ///自分のSM_JOINを取り消す。 | |
| 702 if (sm_join_channel!=null) cancel_sm_join(); | |
| 353 | 703 // SMCMD_SM_JOIN は、master まで上昇する。 |
| 704 // masterでなければ、自分のparentに転送する。 | |
| 355 | 705 if(isMaster()) { |
| 353 | 706 // master であれば、SessionManager IDを決めて、 |
| 707 // 自分のsmList に登録 | |
| 377 | 708 registSessionManager(forwarder, command); |
| 355 | 709 } else { |
| 710 if (forwarder.sid==-1) { | |
| 711 // direct link の場合は、識別のために、EIDに直上の | |
| 712 // smid を入れておく。 | |
| 713 command.setEID(smList.sessionManagerID()); | |
| 714 } | |
| 715 smList.sendToMaster(command); | |
| 353 | 716 } |
| 717 } | |
| 718 break; | |
| 719 | |
| 355 | 720 case SMCMD_SM_JOIN_ACK: |
| 721 send_sm_join_ack(command.eid, command.sid, command); | |
| 353 | 722 break; |
| 723 | |
| 724 case SMCMD_UPDATE: | |
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725 if (!isMaster()) { |
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726 command.setString(mergeUpdate(command)); |
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727 // 上に知らせる |
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728 smList.sendToMaster(command); |
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729 break; |
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730 } |
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731 // fall thru |
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732 command.setCMD(REP.SMCMD_UPDATE_ACK); |
| 353 | 733 case SMCMD_UPDATE_ACK: |
| 358 | 734 command.setString(mergeUpdate(command)); |
| 735 // 下に知らせる | |
| 355 | 736 smList.sendToSlaves(command); |
| 358 | 737 updateGUI(); |
| 353 | 738 break; |
| 739 default: | |
| 740 return false; | |
| 741 } | |
| 742 return true; | |
| 743 } | |
| 744 | |
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745 private void registSessionManager(REPNode forwarder, REPCommand command) { |
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746 REPNode sm; |
| 377 | 747 int psid = command.eid; |
| 748 if (forwarder.sid!=-1) { | |
| 749 // すでに channelはSessionManager Idを持っていて、 | |
| 750 // direct link ではないので、 | |
| 751 // channel を持たないForwarderとして登録する | |
| 752 sm = new Forwarder(this); | |
| 753 } else { | |
| 754 sm = forwarder; | |
| 755 } | |
| 756 int sid = smList.addNewSessionManager(sm,command); | |
| 757 routingTable.add(forwarder,sid); | |
| 758 | |
| 759 REPCommand sendCommand = makeREPCommandWithSessionList(REP.SMCMD_SM_JOIN_ACK); | |
| 760 // command.eid==smList.sesionManagerID() の場合は、 | |
| 761 // 待っている自分の下のsessionManagerにsidをassignする必要がある。 | |
| 762 sendCommand.setSID(sid); // new Session manager ID | |
| 763 // 複数のSM_JOIN_ACKを識別するには、最初にSM_JOINを受け付けた | |
| 764 // Session manager IDを使う。 | |
| 765 sendCommand.setEID(psid); | |
| 766 send_sm_join_ack(psid, sid, sendCommand); | |
| 767 } | |
| 768 | |
| 769 | |
| 770 void send_sm_join_ack(int psid, int sid,REPCommand sendCommand) { | |
| 771 if (psid==smList.sessionManagerID()) { | |
| 772 // 直下のsessionManagerにIDを割り振る必要がある。 | |
| 773 smList.assignSessionManagerIDtoWaitingSM(sid); | |
| 774 // ここで smList に一つだけ追加されるので | |
| 775 // 待っている最初のsm一つにだけ、sm_join_ackが新たに送られる。 | |
| 776 } | |
| 777 smList.sendToSlaves(sendCommand); | |
| 778 } | |
| 779 | |
| 372 | 780 /* |
| 781 * 指定されたeditorがlocalにあるかどうかを調べる。なければ、他に送る。戻って何回も探すことが | |
| 782 * あり得るので、よろしくない。 | |
| 783 */ | |
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784 private void searchSelectedEditor(REPCommand command, REPNode editor) { |
| 372 | 785 for(;editor.isDirect();editor = editor.getNextForwarder()) { |
| 786 if (editor.getEID()==command.eid) { | |
| 787 // select したeditor を見つけた | |
| 788 command.cmd=REP.SMCMD_JOIN_ACK; | |
| 789 editor.send(command); | |
| 790 return; | |
| 791 } | |
| 792 } | |
| 793 // ここにはありませんでした。 | |
| 794 editor.send(command); | |
| 795 } | |
| 796 | |
| 355 | 797 |
| 363 | 798 /** |
| 799 * UPDATE/UPDATE_ACKにより送られてきたSessionの情報を追加する | |
| 800 * @param command | |
| 801 * @return | |
| 802 * @throws IOException | |
| 803 */ | |
| 358 | 804 private String mergeUpdate(REPCommand command) throws IOException { |
| 805 SessionList receivedSessionList; | |
| 806 try { | |
| 807 receivedSessionList = decoder.decode(command.string); | |
| 808 } catch (SAXException e) { | |
| 809 throw new IOException(); | |
| 810 } | |
| 363 | 811 // 受け取った情報と自分の情報を混ぜる。 |
| 812 sessionList.merge(receivedSessionList); | |
| 358 | 813 //XMLを生成。送信コマンドにセット。 |
| 814 return encoder.sessionListToXML(sessionList); | |
| 815 | |
| 816 } | |
| 817 | |
| 818 /* | |
| 819 * id has SessionManager ID part | |
| 820 */ | |
| 821 private int makeID(int newid) { | |
| 822 return newid+smList.sessionManagerID()*MAXID; | |
| 823 } | |
| 824 | |
| 825 private int getSMID(int id) { | |
| 826 return id/MAXID; | |
| 827 } | |
| 828 | |
| 829 | |
| 361 | 830 /** |
| 831 * Register Editor to our editorList. No connection is made. | |
| 832 * @param forwarder Editor to be add | |
| 833 * @param command | |
| 834 */ | |
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835 public void registEditor(REPNode forwarder,REPCommand command) { |
| 358 | 836 // make ack for PUT/JOIN. Do not send this to the editor, |
| 837 // before select. After select, ack is sent to the editor. | |
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838 REPNode editor; |
| 367 | 839 if (getSMID(command.eid)==smList.sessionManagerID()) { |
| 840 if (forwarder.isDirect()) { | |
| 841 editor = (Editor)forwarder; | |
| 842 } else | |
| 843 return; | |
| 358 | 844 } else { |
| 845 editor = new Editor(this, command.cmd==REP.SMCMD_PUT_ACK, command.eid); | |
| 846 } | |
| 847 editor.setName(command.string); | |
| 848 editor.setSID(command.sid); | |
| 849 if (!editorList.hasEid(command.eid)) { | |
| 850 editorList.add(editor); | |
| 851 } | |
| 367 | 852 if (command.cmd==REP.SMCMD_PUT_ACK) { |
| 853 Session session = new Session(command.sid, command.string, editor); | |
| 854 sessionList.put(command.sid, session); | |
| 855 } | |
| 358 | 856 // we don't join ack to the direct linked editor. We |
| 857 // have to wait select command | |
| 858 } | |
| 859 | |
| 860 | |
| 355 | 861 private REPCommand makeREPCommandWithSessionList(REP cmd) { |
| 862 //SessionListからXMLを生成。 | |
| 863 //joinしてきたSessionManagerに対してACKを送信。 | |
| 864 REPCommand sendCommand = new REPCommand(); | |
| 865 sendCommand.setCMD(cmd); | |
| 358 | 866 sendCommand.setString(encoder.sessionListToXML(sessionList)); |
| 355 | 867 return sendCommand; |
| 868 } | |
| 869 | |
| 870 | |
| 871 public boolean isMaster() { | |
| 872 return smList.isMaster(); | |
| 873 } | |
| 874 | |
| 875 | |
| 876 public void setSessionManagerID(int sid) { | |
| 877 smList.setSessionManagerID(sid); | |
| 878 } | |
| 879 | |
| 358 | 880 |
| 881 public Session getSession(int sid) { | |
| 882 return sessionList.get(sid); | |
| 883 } | |
| 884 | |
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885 public void execAfterConnect(SessionManagerEvent sessionManagerEvent) { |
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886 execAfterConnect = sessionManagerEvent; |
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887 } |
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888 |
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889 public void afterConnect() { |
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890 if (execAfterConnect!=null) execAfterConnect.exec(this); |
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891 execAfterConnect = null; |
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892 } |
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893 |
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894 public void setParent(REPNode fw) { |
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895 smList.setParent(fw); |
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896 } |
| 367 | 897 |
| 898 public String toString() { | |
| 899 int myId = 0; | |
| 900 if (smList!=null) myId = smList.sessionManagerID(); | |
| 901 return "rep.SessionManager-"+myId+"@"+myHost+":"+receive_port; | |
| 902 } | |
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903 |
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904 public void addWaitingSessionManager(REPNode fw, REPCommand command) { |
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905 smList.addWaitingSessionManager(fw, command) ; |
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906 } |
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907 |
| 364 | 908 |
| 0 | 909 } |