| 1 | package dmg.cells.nucleus; |
| 2 | |
| 3 | import dmg.util.Pinboard; |
| 4 | import dmg.util.BufferedLineWriter; |
| 5 | import dmg.util.Slf4jErrorWriter; |
| 6 | import dmg.util.Slf4jInfoWriter; |
| 7 | import dmg.util.logback.FilterThresholds; |
| 8 | import java.io.*; |
| 9 | import java.util.*; |
| 10 | import java.util.concurrent.ExecutorService; |
| 11 | import java.util.concurrent.Executors; |
| 12 | import java.util.concurrent.ThreadPoolExecutor; |
| 13 | import java.util.concurrent.ThreadFactory; |
| 14 | import java.util.concurrent.RejectedExecutionException; |
| 15 | import java.lang.reflect.*; |
| 16 | import java.net.Socket; |
| 17 | |
| 18 | import org.slf4j.LoggerFactory; |
| 19 | import org.slf4j.Logger; |
| 20 | import org.dcache.commons.util.NDC; |
| 21 | |
| 22 | import ch.qos.logback.classic.Level; |
| 23 | |
| 24 | |
| 25 | /** |
| 26 | * |
| 27 | * |
| 28 | * @author Patrick Fuhrmann |
| 29 | * @version 0.1, 15 Feb 1998 |
| 30 | */ |
| 31 | public class CellNucleus implements ThreadFactory |
| 32 | { |
| 33 | private static final int INITIAL = 0; |
| 34 | private static final int ACTIVE = 1; |
| 35 | private static final int REMOVING = 2; |
| 36 | private static final int DEAD = 3; |
| 37 | |
| 38 | private static CellGlue __cellGlue = null; |
| 39 | private final String _cellName; |
| 40 | private final String _cellType; |
| 41 | private ThreadGroup _threads = null; |
| 42 | private final Cell _cell; |
| 43 | private final Date _creationTime = new Date(); |
| 44 | private int _state = INITIAL; |
| 45 | private int _printoutLevel = 0; |
| 46 | |
| 47 | private final static Logger _logMessages = |
| 48 | LoggerFactory.getLogger("logger.org.dcache.cells.messages"); |
| 49 | private final static Logger _logNucleus = |
| 50 | LoggerFactory.getLogger(CellNucleus.class); |
| 51 | private final Logger _logCell; |
| 52 | |
| 53 | // have to be synchronized map |
| 54 | private final Map<UOID, CellLock> _waitHash = new HashMap<UOID, CellLock>(); |
| 55 | private String _cellClass; |
| 56 | |
| 57 | private volatile ExecutorService _callbackExecutor; |
| 58 | private volatile ExecutorService _messageExecutor; |
| 59 | |
| 60 | private boolean _isPrivateCallbackExecutor = true; |
| 61 | private boolean _isPrivateMessageExecutor = true; |
| 62 | |
| 63 | private Pinboard _pinboard; |
| 64 | private FilterThresholds _loggingThresholds; |
| 65 | |
| 66 | public CellNucleus(Cell cell, String name) { |
| 67 | |
| 68 | this(cell, name, "Generic"); |
| 69 | } |
| 70 | public CellNucleus(Cell cell, String name, String type) { |
| 71 | |
| 72 | _logCell = LoggerFactory.getLogger(cell.getClass()); |
| 73 | |
| 74 | if (__cellGlue == null) { |
| 75 | // |
| 76 | // the cell gluon hasn't yet been created |
| 77 | // (we insist in creating a SystemCell first.) |
| 78 | // |
| 79 | if (cell instanceof dmg.cells.nucleus.SystemCell) { |
| 80 | __cellGlue = new CellGlue(name); |
| 81 | _cellName = "System"; |
| 82 | _cellType = "System"; |
| 83 | __cellGlue.setSystemNucleus(this); |
| 84 | } else { |
| 85 | throw new |
| 86 | IllegalArgumentException("System must be first Cell"); |
| 87 | } |
| 88 | |
| 89 | } else { |
| 90 | // |
| 91 | // we don't accept more then one System.cells |
| 92 | // |
| 93 | if (cell instanceof dmg.cells.nucleus.SystemCell) { |
| 94 | throw new |
| 95 | IllegalArgumentException("System already exists"); |
| 96 | } else { |
| 97 | String cellName = name.replace('@', '+'); |
| 98 | |
| 99 | if ((cellName == null) || |
| 100 | (cellName.equals("")))cellName = "*"; |
| 101 | if (cellName.charAt(cellName.length() - 1) == '*') { |
| 102 | if (cellName.length() == 1) { |
| 103 | cellName = "$-"+getUnique(); |
| 104 | } else { |
| 105 | cellName = cellName.substring(0,cellName.length()-1)+ |
| 106 | "-"+getUnique(); |
| 107 | } |
| 108 | } |
| 109 | |
| 110 | _cellName = cellName; |
| 111 | _cellType = type; |
| 112 | |
| 113 | } |
| 114 | } |
| 115 | |
| 116 | _cell = cell; |
| 117 | _cellClass = _cell.getClass().getName(); |
| 118 | |
| 119 | // |
| 120 | // for the use in restricted sandboxes |
| 121 | // |
| 122 | try { |
| 123 | |
| 124 | _threads = new ThreadGroup(__cellGlue.getMasterThreadGroup(), |
| 125 | _cellName+"-threads"); |
| 126 | |
| 127 | } catch(SecurityException se) { |
| 128 | _threads = null; |
| 129 | } |
| 130 | |
| 131 | _callbackExecutor = Executors.newSingleThreadExecutor(this); |
| 132 | _messageExecutor = Executors.newSingleThreadExecutor(this); |
| 133 | |
| 134 | _logNucleus.info("Created : "+name); |
| 135 | _state = ACTIVE; |
| 136 | |
| 137 | // |
| 138 | // make ourself known to the world |
| 139 | // |
| 140 | _printoutLevel = __cellGlue.getDefaultPrintoutLevel(); |
| 141 | __cellGlue.addCell(_cellName, this); |
| 142 | |
| 143 | } |
| 144 | |
| 145 | /** |
| 146 | * Returns the CellNucleus to which log messages tagged with a |
| 147 | * given cell are associated. |
| 148 | */ |
| 149 | public static CellNucleus getLogTargetForCell(String cell) |
| 150 | { |
| 151 | CellNucleus nucleus = null; |
| 152 | if (__cellGlue != null) { |
| 153 | if (cell != null) { |
| 154 | nucleus = __cellGlue.getCell(cell); |
| 155 | } |
| 156 | if (nucleus == null) { |
| 157 | nucleus = __cellGlue.getSystemNucleus(); |
| 158 | } |
| 159 | } |
| 160 | return nucleus; |
| 161 | } |
| 162 | |
| 163 | void setSystemNucleus(CellNucleus nucleus) { |
| 164 | __cellGlue.setSystemNucleus(nucleus); |
| 165 | } |
| 166 | |
| 167 | boolean isSystemNucleus() { |
| 168 | return this == __cellGlue.getSystemNucleus(); |
| 169 | } |
| 170 | |
| 171 | public String getCellName() { return _cellName; } |
| 172 | public String getCellType() { return _cellType; } |
| 173 | |
| 174 | public String getCellClass() |
| 175 | { |
| 176 | return _cellClass; |
| 177 | } |
| 178 | |
| 179 | public void setCellClass(String cellClass) |
| 180 | { |
| 181 | _cellClass = cellClass; |
| 182 | } |
| 183 | |
| 184 | public CellAddressCore getThisAddress() { |
| 185 | return new CellAddressCore(_cellName, __cellGlue.getCellDomainName()); |
| 186 | } |
| 187 | public CellDomainInfo getCellDomainInfo() { |
| 188 | return __cellGlue.getCellDomainInfo(); |
| 189 | } |
| 190 | public String getCellDomainName() { |
| 191 | return __cellGlue.getCellDomainName(); |
| 192 | } |
| 193 | public String [] getCellNames() { return __cellGlue.getCellNames(); } |
| 194 | public CellInfo getCellInfo(String name) { |
| 195 | return __cellGlue.getCellInfo(name); |
| 196 | } |
| 197 | public CellInfo getCellInfo() { |
| 198 | return __cellGlue.getCellInfo(getCellName()); |
| 199 | } |
| 200 | |
| 201 | public Map<String, Object> getDomainContext() |
| 202 | { |
| 203 | return __cellGlue.getCellContext(); |
| 204 | } |
| 205 | |
| 206 | public Reader getDomainContextReader(String contextName) |
| 207 | throws FileNotFoundException { |
| 208 | Object o = __cellGlue.getCellContext(contextName); |
| 209 | if (o == null) |
| 210 | throw new |
| 211 | FileNotFoundException("Context not found : "+contextName); |
| 212 | return new StringReader(o.toString()); |
| 213 | } |
| 214 | public void setDomainContext(String contextName, Object context) { |
| 215 | __cellGlue.getCellContext().put(contextName, context); |
| 216 | } |
| 217 | public Object getDomainContext(String str) { |
| 218 | return __cellGlue.getCellContext(str); |
| 219 | } |
| 220 | public String [] [] getClassProviders() { |
| 221 | return __cellGlue.getClassProviders(); |
| 222 | } |
| 223 | public synchronized void setClassProvider(String selection, String provider) { |
| 224 | __cellGlue.setClassProvider(selection, provider); |
| 225 | } |
| 226 | Cell getThisCell() { return _cell; } |
| 227 | |
| 228 | CellInfo _getCellInfo() { |
| 229 | CellInfo info = new CellInfo(); |
| 230 | info.setCellName(getCellName()); |
| 231 | info.setDomainName(getCellDomainName()); |
| 232 | info.setCellType(getCellType()); |
| 233 | info.setCreationTime(_creationTime); |
| 234 | try { |
| 235 | info.setCellVersion(getCellVersionByObject(_cell)); |
| 236 | } catch(Exception e) {} |
| 237 | try { |
| 238 | info.setPrivateInfo(_cell.getInfo()); |
| 239 | } catch(Exception e) { |
| 240 | info.setPrivateInfo("Not yet/No more available\n"); |
| 241 | } |
| 242 | try { |
| 243 | info.setShortInfo(_cell.toString()); |
| 244 | } catch(Exception e) { |
| 245 | info.setShortInfo("Not yet/No more available"); |
| 246 | } |
| 247 | info.setCellClass(_cellClass); |
| 248 | try { |
| 249 | info.setEventQueueSize(getEventQueueSize()); |
| 250 | info.setState(_state); |
| 251 | info.setThreadCount(_threads.activeCount()); |
| 252 | } catch(Exception e) { |
| 253 | info.setEventQueueSize(0); |
| 254 | info.setState(0); |
| 255 | info.setThreadCount(0); |
| 256 | } |
| 257 | return info; |
| 258 | } |
| 259 | public void setPrintoutLevel(int level) { _printoutLevel = level; } |
| 260 | public int getPrintoutLevel() { return _printoutLevel; } |
| 261 | public void setPrintoutLevel(String cellName, int level) { |
| 262 | __cellGlue.setPrintoutLevel(cellName, level); |
| 263 | } |
| 264 | public int getPrintoutLevel(String cellName) { |
| 265 | return __cellGlue.getPrintoutLevel(cellName); |
| 266 | } |
| 267 | |
| 268 | public void setLoggingThresholds(FilterThresholds thresholds) |
| 269 | { |
| 270 | _loggingThresholds = thresholds; |
| 271 | } |
| 272 | |
| 273 | public FilterThresholds getLoggingThresholds() |
| 274 | { |
| 275 | return _loggingThresholds; |
| 276 | } |
| 277 | |
| 278 | public void setPinboard(Pinboard pinboard) |
| 279 | { |
| 280 | _pinboard = pinboard; |
| 281 | } |
| 282 | |
| 283 | public Pinboard getPinboard() |
| 284 | { |
| 285 | return _pinboard; |
| 286 | } |
| 287 | |
| 288 | public synchronized void setAsyncCallback(boolean asyncCallback) |
| 289 | { |
| 290 | if (asyncCallback) { |
| 291 | setCallbackExecutor(Executors.newCachedThreadPool(this)); |
| 292 | } else { |
| 293 | setCallbackExecutor(Executors.newSingleThreadExecutor(this)); |
| 294 | } |
| 295 | _isPrivateCallbackExecutor = true; |
| 296 | } |
| 297 | |
| 298 | /** |
| 299 | * Executor used for message callbacks. |
| 300 | */ |
| 301 | public synchronized void setCallbackExecutor(ExecutorService executor) |
| 302 | { |
| 303 | if (executor == null) { |
| 304 | throw new IllegalArgumentException("null is not allowed"); |
| 305 | } |
| 306 | if (_isPrivateCallbackExecutor) { |
| 307 | _callbackExecutor.shutdown(); |
| 308 | } |
| 309 | _callbackExecutor = executor; |
| 310 | _isPrivateCallbackExecutor = false; |
| 311 | } |
| 312 | |
| 313 | /** |
| 314 | * Executor used for incoming message delivery. |
| 315 | */ |
| 316 | public synchronized void setMessageExecutor(ExecutorService executor) |
| 317 | { |
| 318 | if (executor == null) { |
| 319 | throw new IllegalArgumentException("null is not allowed"); |
| 320 | } |
| 321 | if (_isPrivateMessageExecutor) { |
| 322 | _messageExecutor.shutdown(); |
| 323 | } |
| 324 | _messageExecutor = executor; |
| 325 | _isPrivateMessageExecutor = false; |
| 326 | } |
| 327 | |
| 328 | public void sendMessage(CellMessage msg) |
| 329 | throws SerializationException, |
| 330 | NoRouteToCellException { |
| 331 | |
| 332 | sendMessage(msg, true, true); |
| 333 | |
| 334 | } |
| 335 | public void resendMessage(CellMessage msg) |
| 336 | throws SerializationException, |
| 337 | NoRouteToCellException { |
| 338 | |
| 339 | sendMessage(msg, false, true); |
| 340 | |
| 341 | } |
| 342 | public void sendMessage(CellMessage msg, |
| 343 | boolean locally, |
| 344 | boolean remotely) |
| 345 | throws SerializationException, |
| 346 | NoRouteToCellException { |
| 347 | |
| 348 | if (!msg.isStreamMode()) { |
| 349 | msg.touch(); |
| 350 | } |
| 351 | |
| 352 | EventLogger.sendBegin(this, msg, "async"); |
| 353 | try { |
| 354 | __cellGlue.sendMessage(this, msg, locally, remotely); |
| 355 | } finally { |
| 356 | EventLogger.sendEnd(msg); |
| 357 | } |
| 358 | } |
| 359 | public CellMessage sendAndWait(CellMessage msg, long timeout) |
| 360 | throws SerializationException, |
| 361 | NoRouteToCellException, |
| 362 | InterruptedException { |
| 363 | return sendAndWait(msg, true, true, timeout); |
| 364 | } |
| 365 | |
| 366 | public CellMessage sendAndWait(CellMessage msg, |
| 367 | boolean local, |
| 368 | boolean remote, |
| 369 | long timeout) |
| 370 | throws SerializationException, |
| 371 | NoRouteToCellException, |
| 372 | InterruptedException |
| 373 | { |
| 374 | if (!msg.isStreamMode()) { |
| 375 | msg.touch(); |
| 376 | } |
| 377 | |
| 378 | msg.setTtl(timeout); |
| 379 | |
| 380 | EventLogger.sendBegin(this, msg, "blocking"); |
| 381 | UOID uoid = msg.getUOID(); |
| 382 | try { |
| 383 | CellLock lock = new CellLock(); |
| 384 | synchronized (_waitHash) { |
| 385 | _waitHash.put(uoid, lock); |
| 386 | } |
| 387 | _logNucleus.info("sendAndWait : adding to hash : " + uoid); |
| 388 | |
| 389 | __cellGlue.sendMessage(this, msg, local, remote); |
| 390 | |
| 391 | // |
| 392 | // because of a linux native thread problem with |
| 393 | // wait(n > 0), we have to use a interruptedFlag |
| 394 | // and the time messurement. |
| 395 | // |
| 396 | synchronized (lock) { |
| 397 | long start = System.currentTimeMillis(); |
| 398 | while (lock.getObject() == null && timeout > 0) { |
| 399 | lock.wait(timeout); |
| 400 | timeout -= (System.currentTimeMillis() - start); |
| 401 | } |
| 402 | } |
| 403 | CellMessage answer = (CellMessage)lock.getObject(); |
| 404 | if (answer == null) { |
| 405 | return null; |
| 406 | } |
| 407 | answer = new CellMessage(answer); |
| 408 | |
| 409 | Object obj = answer.getMessageObject(); |
| 410 | if (obj instanceof NoRouteToCellException) { |
| 411 | throw (NoRouteToCellException) obj; |
| 412 | } else if (obj instanceof SerializationException) { |
| 413 | throw (SerializationException) obj; |
| 414 | } |
| 415 | return answer; |
| 416 | } finally { |
| 417 | synchronized (_waitHash) { |
| 418 | _waitHash.remove(uoid); |
| 419 | } |
| 420 | EventLogger.sendEnd(msg); |
| 421 | } |
| 422 | } |
| 423 | |
| 424 | public Map<UOID,CellLock > getWaitQueue() { |
| 425 | |
| 426 | Map<UOID,CellLock > hash = new HashMap<UOID,CellLock >(); |
| 427 | synchronized (_waitHash) { |
| 428 | hash.putAll(_waitHash); |
| 429 | } |
| 430 | return hash; |
| 431 | } |
| 432 | |
| 433 | public int updateWaitQueue() |
| 434 | { |
| 435 | Collection<CellLock> expired = new ArrayList<CellLock>(); |
| 436 | long now = System.currentTimeMillis(); |
| 437 | int size; |
| 438 | |
| 439 | synchronized (_waitHash) { |
| 440 | Iterator<CellLock> i = _waitHash.values().iterator(); |
| 441 | while (i.hasNext()) { |
| 442 | CellLock lock = i.next(); |
| 443 | if (lock != null && !lock.isSync() && lock.getTimeout() < now) { |
| 444 | expired.add(lock); |
| 445 | i.remove(); |
| 446 | } |
| 447 | } |
| 448 | size = _waitHash.size(); |
| 449 | } |
| 450 | |
| 451 | // |
| 452 | // _waitHash can't be used here. Otherwise |
| 453 | // we will end up in a deadlock (NO LOCKS WHILE CALLING CALLBACKS) |
| 454 | // |
| 455 | for (CellLock lock: expired) { |
| 456 | CellMessage envelope = lock.getMessage(); |
| 457 | EventLogger.sendEnd(envelope); |
| 458 | lock.getCallback().answerTimedOut(envelope); |
| 459 | } |
| 460 | |
| 461 | return size; |
| 462 | } |
| 463 | |
| 464 | public void sendMessage(CellMessage msg, |
| 465 | boolean local, |
| 466 | boolean remote, |
| 467 | CellMessageAnswerable callback, |
| 468 | long timeout) |
| 469 | throws SerializationException |
| 470 | { |
| 471 | if (!msg.isStreamMode()) { |
| 472 | msg.touch(); |
| 473 | } |
| 474 | |
| 475 | msg.setTtl(timeout); |
| 476 | |
| 477 | EventLogger.sendBegin(this, msg, "callback"); |
| 478 | UOID uoid = msg.getUOID(); |
| 479 | boolean success = false; |
| 480 | try { |
| 481 | CellLock lock = new CellLock(msg, callback, timeout); |
| 482 | synchronized (_waitHash) { |
| 483 | _waitHash.put(uoid, lock); |
| 484 | } |
| 485 | |
| 486 | __cellGlue.sendMessage(this, msg, local, remote); |
| 487 | success = true; |
| 488 | } catch (NoRouteToCellException e) { |
| 489 | if (callback != null) |
| 490 | callback.exceptionArrived(msg, e); |
| 491 | } finally { |
| 492 | if (!success) { |
| 493 | synchronized (_waitHash) { |
| 494 | _waitHash.remove(uoid); |
| 495 | } |
| 496 | EventLogger.sendEnd(msg); |
| 497 | } |
| 498 | } |
| 499 | } |
| 500 | public void addCellEventListener(CellEventListener listener) { |
| 501 | __cellGlue.addCellEventListener(this, listener); |
| 502 | |
| 503 | } |
| 504 | public void export() { __cellGlue.export(this); } |
| 505 | /** |
| 506 | * |
| 507 | * The kill method schedules the specified cell for deletion. |
| 508 | * The actual remove operation will run in a different |
| 509 | * thread. So on return of this method the cell may |
| 510 | * or may not be alive. |
| 511 | */ |
| 512 | public void kill() { __cellGlue.kill(this); } |
| 513 | /** |
| 514 | * |
| 515 | * The kill method schedules this Cell for deletion. |
| 516 | * The actual remove operation will run in a different |
| 517 | * thread. So on return of this method the cell may |
| 518 | * or may not be alive. |
| 519 | */ |
| 520 | public void kill(String cellName) throws IllegalArgumentException { |
| 521 | __cellGlue.kill(this, cellName); |
| 522 | } |
| 523 | |
| 524 | |
| 525 | /** |
| 526 | * Blocks until the given cell is dead. |
| 527 | * |
| 528 | * @param timeout the maximum time to wait in milliseconds. |
| 529 | * @throws InterruptedException if another thread interrupted the |
| 530 | * current thread before or while the current thread was waiting |
| 531 | * for a notification. The interrupted status of the current |
| 532 | * thread is cleared when this exception is thrown. |
| 533 | * @return True if the cell died, false in case of a timeout. |
| 534 | */ |
| 535 | public boolean join(String cellName, long timeout) |
| 536 | throws InterruptedException |
| 537 | { |
| 538 | return __cellGlue.join(cellName, timeout); |
| 539 | } |
| 540 | |
| 541 | /** |
| 542 | * Returns the non-daemon threads of a thread group. |
| 543 | */ |
| 544 | private Collection<Thread> getNonDaemonThreads(ThreadGroup group) |
| 545 | { |
| 546 | Thread[] threads = new Thread[group.activeCount()]; |
| 547 | int count = group.enumerate(threads); |
| 548 | Collection<Thread> nonDaemonThreads = new ArrayList<Thread>(count); |
| 549 | for (int i = 0; i < count; i++) { |
| 550 | Thread thread = threads[i]; |
| 551 | if (!thread.isDaemon()) { |
| 552 | nonDaemonThreads.add(thread); |
| 553 | } |
| 554 | } |
| 555 | return nonDaemonThreads; |
| 556 | } |
| 557 | |
| 558 | /** |
| 559 | * Waits for at most timeout milliseconds for the termination of a |
| 560 | * set of threads. |
| 561 | * |
| 562 | * @return true if all threads terminated, false otherwise |
| 563 | */ |
| 564 | private boolean joinThreads(Collection<Thread> threads, long timeout) |
| 565 | throws InterruptedException |
| 566 | { |
| 567 | long deadline = System.currentTimeMillis() + timeout; |
| 568 | for (Thread thread: threads) { |
| 569 | if (thread.isAlive()) { |
| 570 | long wait = deadline - System.currentTimeMillis(); |
| 571 | if (wait <= 0) { |
| 572 | return false; |
| 573 | } |
| 574 | thread.join(wait); |
| 575 | if (thread.isAlive()) { |
| 576 | return false; |
| 577 | } |
| 578 | } |
| 579 | } |
| 580 | return true; |
| 581 | } |
| 582 | |
| 583 | /** |
| 584 | * Interrupts a set of threads. |
| 585 | */ |
| 586 | private void killThreads(Collection<Thread> threads) |
| 587 | throws InterruptedException |
| 588 | { |
| 589 | for (Thread thread: threads) { |
| 590 | if (thread.isAlive()) { |
| 591 | _logNucleus.info("killerThread : interrupting " + thread.getName()); |
| 592 | thread.interrupt(); |
| 593 | } |
| 594 | } |
| 595 | } |
| 596 | |
| 597 | private Runnable wrapLoggingContext(final Runnable runnable) |
| 598 | { |
| 599 | final NDC ndc = NDC.cloneNdc(); |
| 600 | return new Runnable() { |
| 601 | public void run() { |
| 602 | CDC.setCellsContext(CellNucleus.this); |
| 603 | NDC.set(ndc); |
| 604 | try { |
| 605 | runnable.run(); |
| 606 | } finally { |
| 607 | NDC.clear(); |
| 608 | } |
| 609 | } |
| 610 | }; |
| 611 | } |
| 612 | |
| 613 | public Thread newThread(Runnable target) |
| 614 | { |
| 615 | return new Thread(_threads, wrapLoggingContext(target)); |
| 616 | } |
| 617 | |
| 618 | public Thread newThread(Runnable target, String name) |
| 619 | { |
| 620 | return new Thread(_threads, wrapLoggingContext(target), name); |
| 621 | } |
| 622 | |
| 623 | // |
| 624 | // package |
| 625 | // |
| 626 | Thread [] getThreads(String cellName) { |
| 627 | return __cellGlue.getThreads(cellName); |
| 628 | } |
| 629 | public ThreadGroup getThreadGroup() { return _threads; } |
| 630 | Thread [] getThreads() { |
| 631 | if (_threads == null)return new Thread[0]; |
| 632 | |
| 633 | int threadCount = _threads.activeCount(); |
| 634 | Thread [] list = new Thread[threadCount]; |
| 635 | int rc = _threads.enumerate(list); |
| 636 | if (rc == list.length)return list; |
| 637 | Thread [] ret = new Thread[rc]; |
| 638 | System.arraycopy(list, 0, ret, 0, rc); |
| 639 | return ret; |
| 640 | } |
| 641 | |
| 642 | int getUnique() { return __cellGlue.getUnique(); } |
| 643 | |
| 644 | int getEventQueueSize() |
| 645 | { |
| 646 | if (_messageExecutor instanceof ThreadPoolExecutor) { |
| 647 | ThreadPoolExecutor executor = |
| 648 | (ThreadPoolExecutor) _messageExecutor; |
| 649 | return executor.getQueue().size(); |
| 650 | } |
| 651 | return 0; |
| 652 | } |
| 653 | |
| 654 | void addToEventQueue(CellEvent ce) { |
| 655 | // |
| 656 | // |
| 657 | if (ce instanceof RoutedMessageEvent) { |
| 658 | if (_cell instanceof CellTunnel) { |
| 659 | // |
| 660 | // nothing to do (no transformation needed) |
| 661 | // |
| 662 | } else { |
| 663 | // |
| 664 | // originally this case has not been forseen, |
| 665 | // but it appeared rather useful. It allows alias |
| 666 | // cells which serves several different cells names. |
| 667 | // mainly useful for debuggin purposes (see alias |
| 668 | // package. |
| 669 | // |
| 670 | ce = new MessageEvent(((RoutedMessageEvent)ce).getMessage()); |
| 671 | } |
| 672 | } |
| 673 | |
| 674 | try { |
| 675 | if (ce instanceof MessageEvent) { |
| 676 | // |
| 677 | // we have to cover 3 cases : |
| 678 | // - absolutely asynchronous request |
| 679 | // - asynchronous, but we have a callback to call |
| 680 | // - synchronous |
| 681 | // |
| 682 | final CellMessage msg = ((MessageEvent) ce).getMessage(); |
| 683 | if (msg != null) { |
| 684 | _logNucleus.info("addToEventQueue : message arrived : "+msg); |
| 685 | CellLock lock; |
| 686 | |
| 687 | synchronized (_waitHash) { |
| 688 | lock = _waitHash.remove(msg.getLastUOID()); |
| 689 | } |
| 690 | |
| 691 | if (lock != null) { |
| 692 | // |
| 693 | // we were waiting for you (sync or async) |
| 694 | // |
| 695 | _logNucleus.info("addToEventQueue : lock found for : "+msg); |
| 696 | if (lock.isSync()) { |
| 697 | _logNucleus.info("addToEventQueue : is synchronous : "+msg); |
| 698 | synchronized (lock) { |
| 699 | lock.setObject(msg); |
| 700 | lock.notifyAll(); |
| 701 | } |
| 702 | _logNucleus.info("addToEventQueue : dest. was triggered : "+msg); |
| 703 | } else { |
| 704 | _logNucleus.info("addToEventQueue : is asynchronous : "+msg); |
| 705 | _callbackExecutor.execute(new CallbackTask(lock, msg)); |
| 706 | } |
| 707 | return; |
| 708 | } |
| 709 | } // end of : msg != null |
| 710 | } // end of : ce instanceof MessageEvent |
| 711 | |
| 712 | _messageExecutor.execute(new DeliverMessageTask(ce)); |
| 713 | } catch (RejectedExecutionException e) { |
| 714 | _logNucleus.error("Message queue overflow. Dropping " + ce); |
| 715 | } |
| 716 | } |
| 717 | |
| 718 | void sendKillEvent(KillEvent ce) |
| 719 | { |
| 720 | _logNucleus.info("sendKillEvent : received "+ce); |
| 721 | Thread thread = new KillerThread(ce); |
| 722 | thread.start(); |
| 723 | _logNucleus.info("sendKillEvent : " + thread.getName()+" started on group "+ |
| 724 | thread.getThreadGroup().getName()); |
| 725 | } |
| 726 | |
| 727 | // |
| 728 | // helper to get version string from arbitrary object |
| 729 | // |
| 730 | public static CellVersion getCellVersionByObject(Object obj) throws Exception { |
| 731 | Class<?> c = obj.getClass(); |
| 732 | |
| 733 | Method m = c.getMethod("getCellVersion", (Class<?> [])null); |
| 734 | |
| 735 | return (CellVersion)m.invoke(obj, (Object [])null); |
| 736 | } |
| 737 | |
| 738 | public static CellVersion getCellVersionByClass(Class<?> c) throws Exception { |
| 739 | |
| 740 | Method m = c.getMethod("getCellVersion", (Class [])null); |
| 741 | |
| 742 | return (CellVersion)m.invoke((Object)null, (Object [])null); |
| 743 | } |
| 744 | |
| 745 | //////////////////////////////////////////////////////////// |
| 746 | // |
| 747 | // create new cell by different arguments |
| 748 | // String, String [], Socket |
| 749 | // can choose between systemLoader only or |
| 750 | // Domain loader. |
| 751 | // |
| 752 | public Cell createNewCell(String cellClass, |
| 753 | String cellName, |
| 754 | String cellArgs, |
| 755 | boolean systemOnly) |
| 756 | throws ClassNotFoundException, |
| 757 | NoSuchMethodException, |
| 758 | SecurityException, |
| 759 | InstantiationException, |
| 760 | InvocationTargetException, |
| 761 | IllegalAccessException, |
| 762 | ClassCastException |
| 763 | { |
| 764 | try { |
| 765 | Object [] args = new Object[1]; |
| 766 | args[0] = cellArgs; |
| 767 | return (Cell)__cellGlue._newInstance(cellClass, |
| 768 | cellName, |
| 769 | args, |
| 770 | systemOnly); |
| 771 | } catch (InvocationTargetException e) { |
| 772 | Throwable t = e.getTargetException(); |
| 773 | if (t instanceof RuntimeException) { |
| 774 | throw (RuntimeException) t; |
| 775 | } |
| 776 | if (t instanceof Error) { |
| 777 | throw (Error) t; |
| 778 | } |
| 779 | throw e; |
| 780 | } |
| 781 | } |
| 782 | |
| 783 | public Class<?> loadClass(String className) throws ClassNotFoundException { |
| 784 | return __cellGlue.loadClass(className); |
| 785 | } |
| 786 | |
| 787 | public Object createNewCell(String className, |
| 788 | String cellName, |
| 789 | String [] argsClassNames, |
| 790 | Object [] args) |
| 791 | throws ClassNotFoundException, |
| 792 | NoSuchMethodException, |
| 793 | InstantiationException, |
| 794 | IllegalAccessException, |
| 795 | InvocationTargetException, |
| 796 | ClassCastException { |
| 797 | |
| 798 | if (argsClassNames == null) |
| 799 | return __cellGlue._newInstance( |
| 800 | className, cellName, args, false); |
| 801 | else |
| 802 | return __cellGlue._newInstance( |
| 803 | className, cellName, argsClassNames, args, false); |
| 804 | } |
| 805 | |
| 806 | public Cell createNewCell(String cellClass, |
| 807 | String cellName, |
| 808 | Socket socket, |
| 809 | boolean systemOnly) |
| 810 | throws ClassNotFoundException, |
| 811 | NoSuchMethodException, |
| 812 | SecurityException, |
| 813 | InstantiationException, |
| 814 | InvocationTargetException, |
| 815 | IllegalAccessException, |
| 816 | ClassCastException { |
| 817 | |
| 818 | Object [] args = new Object[1]; |
| 819 | args[0] = socket; |
| 820 | |
| 821 | return (Cell)__cellGlue._newInstance(cellClass, |
| 822 | cellName, |
| 823 | args, |
| 824 | systemOnly); |
| 825 | } |
| 826 | //////////////////////////////////////////////////////////// |
| 827 | // |
| 828 | // |
| 829 | // the routing stuff |
| 830 | // |
| 831 | public void routeAdd(CellRoute route) throws IllegalArgumentException { |
| 832 | __cellGlue.routeAdd(route); |
| 833 | } |
| 834 | public void routeDelete(CellRoute route) throws IllegalArgumentException { |
| 835 | __cellGlue.routeDelete(route); |
| 836 | } |
| 837 | CellRoute routeFind(CellAddressCore addr) { |
| 838 | return __cellGlue.getRoutingTable().find(addr); |
| 839 | } |
| 840 | CellRoutingTable getRoutingTable() { return __cellGlue.getRoutingTable(); } |
| 841 | CellRoute [] getRoutingList() { return __cellGlue.getRoutingList(); } |
| 842 | // |
| 843 | CellTunnelInfo [] getCellTunnelInfos() { return __cellGlue.getCellTunnelInfos(); } |
| 844 | // |
| 845 | |
| 846 | public Writer createErrorLogWriter() |
| 847 | { |
| 848 | return new BufferedLineWriter(new Slf4jErrorWriter(_logCell)); |
| 849 | } |
| 850 | |
| 851 | public Writer createInfoLogWriter() |
| 852 | { |
| 853 | return new BufferedLineWriter(new Slf4jInfoWriter(_logCell)); |
| 854 | } |
| 855 | |
| 856 | public static final int PRINT_CELL = 1; |
| 857 | public static final int PRINT_ERROR_CELL = 2; |
| 858 | public static final int PRINT_NUCLEUS = 4; |
| 859 | public static final int PRINT_ERROR_NUCLEUS = 8; |
| 860 | public static final int PRINT_FATAL = 0x10; |
| 861 | public static final int PRINT_ERRORS = |
| 862 | PRINT_ERROR_CELL|PRINT_ERROR_NUCLEUS; |
| 863 | public static final int PRINT_EVERYTHING = |
| 864 | PRINT_CELL|PRINT_ERROR_CELL|PRINT_NUCLEUS|PRINT_ERROR_NUCLEUS|PRINT_FATAL; |
| 865 | |
| 866 | private class KillerThread extends Thread |
| 867 | { |
| 868 | private final KillEvent _event; |
| 869 | |
| 870 | public KillerThread(KillEvent event) |
| 871 | { |
| 872 | super(__cellGlue.getKillerThreadGroup(), "killer-" + _cellName); |
| 873 | _event = event; |
| 874 | } |
| 875 | |
| 876 | @Override |
| 877 | public void run() |
| 878 | { |
| 879 | _logNucleus.info("killerThread : started"); |
| 880 | _state = REMOVING; |
| 881 | addToEventQueue(new LastMessageEvent()); |
| 882 | try { |
| 883 | _cell.prepareRemoval(_event); |
| 884 | } catch (Throwable e) { |
| 885 | Thread t = Thread.currentThread(); |
| 886 | t.getUncaughtExceptionHandler().uncaughtException(t, e); |
| 887 | } |
| 888 | |
| 889 | synchronized (this) { |
| 890 | if (_isPrivateCallbackExecutor) { |
| 891 | _callbackExecutor.shutdown(); |
| 892 | } |
| 893 | if (_isPrivateMessageExecutor) { |
| 894 | _messageExecutor.shutdown(); |
| 895 | } |
| 896 | } |
| 897 | |
| 898 | _logNucleus.info("killerThread : waiting for all threads in "+_threads+" to finish"); |
| 899 | |
| 900 | try { |
| 901 | Collection<Thread> threads = getNonDaemonThreads(_threads); |
| 902 | |
| 903 | /* Some threads shut down asynchronously. Give them |
| 904 | * one second before we start to kill them. |
| 905 | */ |
| 906 | while (!joinThreads(threads, 1000)) { |
| 907 | killThreads(threads); |
| 908 | } |
| 909 | _threads.destroy(); |
| 910 | } catch (IllegalThreadStateException e) { |
| 911 | _threads.setDaemon(true); |
| 912 | } catch (InterruptedException e) { |
| 913 | _logNucleus.warn("killerThread : Interrupted while waiting for threads"); |
| 914 | } |
| 915 | __cellGlue.destroy(CellNucleus.this); |
| 916 | _state = DEAD; |
| 917 | _logNucleus.info("killerThread : stopped"); |
| 918 | } |
| 919 | } |
| 920 | |
| 921 | private abstract class AbstractNucleusTask implements Runnable |
| 922 | { |
| 923 | protected abstract void innerRun(); |
| 924 | |
| 925 | public void run () |
| 926 | { |
| 927 | CDC cdc = new CDC(); |
| 928 | try { |
| 929 | CDC.setCellsContext(CellNucleus.this); |
| 930 | innerRun(); |
| 931 | } catch (Throwable e) { |
| 932 | Thread t = Thread.currentThread(); |
| 933 | t.getUncaughtExceptionHandler().uncaughtException(t, e); |
| 934 | } finally { |
| 935 | cdc.apply(); |
| 936 | } |
| 937 | } |
| 938 | } |
| 939 | |
| 940 | private class CallbackTask extends AbstractNucleusTask |
| 941 | { |
| 942 | private final CellLock _lock; |
| 943 | private final CellMessage _message; |
| 944 | |
| 945 | public CallbackTask(CellLock lock, CellMessage message) |
| 946 | { |
| 947 | _lock = lock; |
| 948 | _message = message; |
| 949 | } |
| 950 | |
| 951 | @Override |
| 952 | public void innerRun() |
| 953 | { |
| 954 | CellMessageAnswerable callback = |
| 955 | _lock.getCallback(); |
| 956 | |
| 957 | CellMessage answer; |
| 958 | Object obj; |
| 959 | try { |
| 960 | answer = new CellMessage(_message); |
| 961 | _lock.getCdc().apply(); |
| 962 | obj = answer.getMessageObject(); |
| 963 | } catch (SerializationException e) { |
| 964 | _logNucleus.warn(e.getMessage()); |
| 965 | obj = e; |
| 966 | answer = null; |
| 967 | } |
| 968 | |
| 969 | EventLogger.sendEnd(_lock.getMessage()); |
| 970 | if (obj instanceof Exception) { |
| 971 | callback. |
| 972 | exceptionArrived(_lock.getMessage(), (Exception) obj); |
| 973 | } else { |
| 974 | callback. |
| 975 | answerArrived(_lock.getMessage(), answer); |
| 976 | } |
| 977 | _logNucleus.info("addToEventQueue : callback done for : " + _message); |
| 978 | } |
| 979 | } |
| 980 | |
| 981 | private class DeliverMessageTask extends AbstractNucleusTask |
| 982 | { |
| 983 | private final CellEvent _event; |
| 984 | |
| 985 | public DeliverMessageTask(CellEvent event) |
| 986 | { |
| 987 | _event = event; |
| 988 | EventLogger.queueBegin(_event); |
| 989 | } |
| 990 | |
| 991 | @Override |
| 992 | public void innerRun() |
| 993 | { |
| 994 | EventLogger.queueEnd(_event); |
| 995 | |
| 996 | if (_event instanceof LastMessageEvent) { |
| 997 | _logNucleus.info("messageThread : LastMessageEvent arrived"); |
| 998 | _cell.messageArrived((MessageEvent) _event); |
| 999 | } else if (_event instanceof RoutedMessageEvent) { |
| 1000 | _logNucleus.info("messageThread : RoutedMessageEvent arrived"); |
| 1001 | _cell.messageArrived((RoutedMessageEvent) _event); |
| 1002 | } else if (_event instanceof MessageEvent) { |
| 1003 | MessageEvent msgEvent = (MessageEvent) _event; |
| 1004 | _logNucleus.info("messageThread : MessageEvent arrived"); |
| 1005 | CellMessage msg; |
| 1006 | try { |
| 1007 | msg = new CellMessage(msgEvent.getMessage()); |
| 1008 | } catch (SerializationException e) { |
| 1009 | CellMessage envelope = msgEvent.getMessage(); |
| 1010 | _logCell.error(String.format("Discarding a malformed message from %s with UOID %s and session [%s]: %s", |
| 1011 | envelope.getSourcePath(), |
| 1012 | envelope.getUOID(), |
| 1013 | envelope.getSession(), |
| 1014 | e.getMessage()), e); |
| 1015 | return; |
| 1016 | } |
| 1017 | |
| 1018 | CDC.setMessageContext(msg); |
| 1019 | try { |
| 1020 | // |
| 1021 | // deserialize the message |
| 1022 | // |
| 1023 | if (_logMessages.isDebugEnabled()) { |
| 1024 | String messageObject = msg.getMessageObject() == null? "NULL" : msg.getMessageObject().getClass().getName(); |
| 1025 | _logMessages.debug("nucleusMessageArrived src=" + msg.getSourceAddress() + |
| 1026 | " dest=" + msg.getDestinationAddress() + " [" + messageObject + "] UOID=" + msg.getUOID().toString()); |
| 1027 | } |
| 1028 | // |
| 1029 | // and deliver it |
| 1030 | // |
| 1031 | _logNucleus.info("messageThread : delivering message : "+msg); |
| 1032 | _cell.messageArrived(new MessageEvent(msg)); |
| 1033 | _logNucleus.info("messageThread : delivering message done : "+msg); |
| 1034 | } catch (RuntimeException e) { |
| 1035 | if (!msg.isReply()) { |
| 1036 | try { |
| 1037 | msg.revertDirection(); |
| 1038 | msg.setMessageObject(e); |
| 1039 | sendMessage(msg); |
| 1040 | } catch (NoRouteToCellException f) { |
| 1041 | _logCell.error("PANIC : Problem returning answer : " + f); |
| 1042 | } |
| 1043 | } |
| 1044 | throw e; |
| 1045 | } finally { |
| 1046 | CDC.clearMessageContext(); |
| 1047 | } |
| 1048 | } |
| 1049 | } |
| 1050 | } |
| 1051 | } |