Jake Slack | 03928ae | 2014-05-13 18:41:56 -0700 | [diff] [blame] | 1 | // |
| 2 | // ======================================================================== |
| 3 | // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd. |
| 4 | // ------------------------------------------------------------------------ |
| 5 | // All rights reserved. This program and the accompanying materials |
| 6 | // are made available under the terms of the Eclipse Public License v1.0 |
| 7 | // and Apache License v2.0 which accompanies this distribution. |
| 8 | // |
| 9 | // The Eclipse Public License is available at |
| 10 | // http://www.eclipse.org/legal/epl-v10.html |
| 11 | // |
| 12 | // The Apache License v2.0 is available at |
| 13 | // http://www.opensource.org/licenses/apache2.0.php |
| 14 | // |
| 15 | // You may elect to redistribute this code under either of these licenses. |
| 16 | // ======================================================================== |
| 17 | // |
| 18 | |
| 19 | package org.eclipse.jetty.io.nio; |
| 20 | |
| 21 | import java.io.IOException; |
| 22 | import java.io.InterruptedIOException; |
| 23 | import java.nio.channels.ClosedChannelException; |
| 24 | import java.nio.channels.SelectableChannel; |
| 25 | import java.nio.channels.SelectionKey; |
| 26 | import java.nio.channels.SocketChannel; |
| 27 | import java.util.Locale; |
| 28 | |
| 29 | import org.eclipse.jetty.io.AsyncEndPoint; |
| 30 | import org.eclipse.jetty.io.Buffer; |
| 31 | import org.eclipse.jetty.io.ConnectedEndPoint; |
| 32 | import org.eclipse.jetty.io.Connection; |
| 33 | import org.eclipse.jetty.io.EofException; |
| 34 | import org.eclipse.jetty.io.nio.SelectorManager.SelectSet; |
| 35 | import org.eclipse.jetty.util.log.Log; |
| 36 | import org.eclipse.jetty.util.log.Logger; |
| 37 | import org.eclipse.jetty.util.thread.Timeout.Task; |
| 38 | |
| 39 | /* ------------------------------------------------------------ */ |
| 40 | /** |
| 41 | * An Endpoint that can be scheduled by {@link SelectorManager}. |
| 42 | */ |
| 43 | public class SelectChannelEndPoint extends ChannelEndPoint implements AsyncEndPoint, ConnectedEndPoint |
| 44 | { |
| 45 | public static final Logger LOG=Log.getLogger("org.eclipse.jetty.io.nio"); |
| 46 | |
| 47 | private final boolean WORK_AROUND_JVM_BUG_6346658 = System.getProperty("os.name").toLowerCase(Locale.ENGLISH).contains("win"); |
| 48 | private final SelectorManager.SelectSet _selectSet; |
| 49 | private final SelectorManager _manager; |
| 50 | private SelectionKey _key; |
| 51 | private final Runnable _handler = new Runnable() |
| 52 | { |
| 53 | public void run() { handle(); } |
| 54 | }; |
| 55 | |
| 56 | /** The desired value for {@link SelectionKey#interestOps()} */ |
| 57 | private int _interestOps; |
| 58 | |
| 59 | /** |
| 60 | * The connection instance is the handler for any IO activity on the endpoint. |
| 61 | * There is a different type of connection for HTTP, AJP, WebSocket and |
| 62 | * ProxyConnect. The connection may change for an SCEP as it is upgraded |
| 63 | * from HTTP to proxy connect or websocket. |
| 64 | */ |
| 65 | private volatile AsyncConnection _connection; |
| 66 | |
| 67 | private static final int STATE_NEEDS_DISPATCH=-1; |
| 68 | private static final int STATE_UNDISPATCHED=0; |
| 69 | private static final int STATE_DISPATCHED=1; |
| 70 | private static final int STATE_ASYNC=2; |
| 71 | private int _state; |
| 72 | |
| 73 | private boolean _onIdle; |
| 74 | |
| 75 | /** true if the last write operation succeed and wrote all offered bytes */ |
| 76 | private volatile boolean _writable = true; |
| 77 | |
| 78 | |
| 79 | /** True if a thread has is blocked in {@link #blockReadable(long)} */ |
| 80 | private boolean _readBlocked; |
| 81 | |
| 82 | /** True if a thread has is blocked in {@link #blockWritable(long)} */ |
| 83 | private boolean _writeBlocked; |
| 84 | |
| 85 | /** true if {@link SelectSet#destroyEndPoint(SelectChannelEndPoint)} has not been called */ |
| 86 | private boolean _open; |
| 87 | |
| 88 | private volatile long _idleTimestamp; |
| 89 | private volatile boolean _checkIdle; |
| 90 | |
| 91 | private boolean _interruptable; |
| 92 | |
| 93 | private boolean _ishut; |
| 94 | |
| 95 | /* ------------------------------------------------------------ */ |
| 96 | public SelectChannelEndPoint(SocketChannel channel, SelectSet selectSet, SelectionKey key, int maxIdleTime) |
| 97 | throws IOException |
| 98 | { |
| 99 | super(channel, maxIdleTime); |
| 100 | |
| 101 | _manager = selectSet.getManager(); |
| 102 | _selectSet = selectSet; |
| 103 | _state=STATE_UNDISPATCHED; |
| 104 | _onIdle=false; |
| 105 | _open=true; |
| 106 | _key = key; |
| 107 | |
| 108 | setCheckForIdle(true); |
| 109 | } |
| 110 | |
| 111 | /* ------------------------------------------------------------ */ |
| 112 | public SelectionKey getSelectionKey() |
| 113 | { |
| 114 | synchronized (this) |
| 115 | { |
| 116 | return _key; |
| 117 | } |
| 118 | } |
| 119 | |
| 120 | /* ------------------------------------------------------------ */ |
| 121 | public SelectorManager getSelectManager() |
| 122 | { |
| 123 | return _manager; |
| 124 | } |
| 125 | |
| 126 | /* ------------------------------------------------------------ */ |
| 127 | public Connection getConnection() |
| 128 | { |
| 129 | return _connection; |
| 130 | } |
| 131 | |
| 132 | /* ------------------------------------------------------------ */ |
| 133 | public void setConnection(Connection connection) |
| 134 | { |
| 135 | Connection old=_connection; |
| 136 | _connection=(AsyncConnection)connection; |
| 137 | if (old!=null && old!=_connection) |
| 138 | _manager.endPointUpgraded(this,old); |
| 139 | } |
| 140 | |
| 141 | /* ------------------------------------------------------------ */ |
| 142 | public long getIdleTimestamp() |
| 143 | { |
| 144 | return _idleTimestamp; |
| 145 | } |
| 146 | |
| 147 | /* ------------------------------------------------------------ */ |
| 148 | /** Called by selectSet to schedule handling |
| 149 | * |
| 150 | */ |
| 151 | public void schedule() |
| 152 | { |
| 153 | synchronized (this) |
| 154 | { |
| 155 | // If there is no key, then do nothing |
| 156 | if (_key == null || !_key.isValid()) |
| 157 | { |
| 158 | _readBlocked=false; |
| 159 | _writeBlocked=false; |
| 160 | this.notifyAll(); |
| 161 | return; |
| 162 | } |
| 163 | |
| 164 | // If there are threads dispatched reading and writing |
| 165 | if (_readBlocked || _writeBlocked) |
| 166 | { |
| 167 | // assert _dispatched; |
| 168 | if (_readBlocked && _key.isReadable()) |
| 169 | _readBlocked=false; |
| 170 | if (_writeBlocked && _key.isWritable()) |
| 171 | _writeBlocked=false; |
| 172 | |
| 173 | // wake them up is as good as a dispatched. |
| 174 | this.notifyAll(); |
| 175 | |
| 176 | // we are not interested in further selecting |
| 177 | _key.interestOps(0); |
| 178 | if (_state<STATE_DISPATCHED) |
| 179 | updateKey(); |
| 180 | return; |
| 181 | } |
| 182 | |
| 183 | // Remove writeable op |
| 184 | if ((_key.readyOps() & SelectionKey.OP_WRITE) == SelectionKey.OP_WRITE && (_key.interestOps() & SelectionKey.OP_WRITE) == SelectionKey.OP_WRITE) |
| 185 | { |
| 186 | // Remove writeable op |
| 187 | _interestOps = _key.interestOps() & ~SelectionKey.OP_WRITE; |
| 188 | _key.interestOps(_interestOps); |
| 189 | _writable = true; // Once writable is in ops, only removed with dispatch. |
| 190 | } |
| 191 | |
| 192 | // If dispatched, then deregister interest |
| 193 | if (_state>=STATE_DISPATCHED) |
| 194 | _key.interestOps(0); |
| 195 | else |
| 196 | { |
| 197 | // other wise do the dispatch |
| 198 | dispatch(); |
| 199 | if (_state>=STATE_DISPATCHED && !_selectSet.getManager().isDeferringInterestedOps0()) |
| 200 | { |
| 201 | _key.interestOps(0); |
| 202 | } |
| 203 | } |
| 204 | } |
| 205 | } |
| 206 | |
| 207 | /* ------------------------------------------------------------ */ |
| 208 | public void asyncDispatch() |
| 209 | { |
| 210 | synchronized(this) |
| 211 | { |
| 212 | switch(_state) |
| 213 | { |
| 214 | case STATE_NEEDS_DISPATCH: |
| 215 | case STATE_UNDISPATCHED: |
| 216 | dispatch(); |
| 217 | break; |
| 218 | |
| 219 | case STATE_DISPATCHED: |
| 220 | case STATE_ASYNC: |
| 221 | _state=STATE_ASYNC; |
| 222 | break; |
| 223 | } |
| 224 | } |
| 225 | } |
| 226 | |
| 227 | /* ------------------------------------------------------------ */ |
| 228 | public void dispatch() |
| 229 | { |
| 230 | synchronized(this) |
| 231 | { |
| 232 | if (_state<=STATE_UNDISPATCHED) |
| 233 | { |
| 234 | if (_onIdle) |
| 235 | _state = STATE_NEEDS_DISPATCH; |
| 236 | else |
| 237 | { |
| 238 | _state = STATE_DISPATCHED; |
| 239 | boolean dispatched = _manager.dispatch(_handler); |
| 240 | if(!dispatched) |
| 241 | { |
| 242 | _state = STATE_NEEDS_DISPATCH; |
| 243 | LOG.warn("Dispatched Failed! "+this+" to "+_manager); |
| 244 | updateKey(); |
| 245 | } |
| 246 | } |
| 247 | } |
| 248 | } |
| 249 | } |
| 250 | |
| 251 | /* ------------------------------------------------------------ */ |
| 252 | /** |
| 253 | * Called when a dispatched thread is no longer handling the endpoint. |
| 254 | * The selection key operations are updated. |
| 255 | * @return If false is returned, the endpoint has been redispatched and |
| 256 | * thread must keep handling the endpoint. |
| 257 | */ |
| 258 | protected boolean undispatch() |
| 259 | { |
| 260 | synchronized (this) |
| 261 | { |
| 262 | switch(_state) |
| 263 | { |
| 264 | case STATE_ASYNC: |
| 265 | _state=STATE_DISPATCHED; |
| 266 | return false; |
| 267 | |
| 268 | default: |
| 269 | _state=STATE_UNDISPATCHED; |
| 270 | updateKey(); |
| 271 | return true; |
| 272 | } |
| 273 | } |
| 274 | } |
| 275 | |
| 276 | /* ------------------------------------------------------------ */ |
| 277 | public void cancelTimeout(Task task) |
| 278 | { |
| 279 | getSelectSet().cancelTimeout(task); |
| 280 | } |
| 281 | |
| 282 | /* ------------------------------------------------------------ */ |
| 283 | public void scheduleTimeout(Task task, long timeoutMs) |
| 284 | { |
| 285 | getSelectSet().scheduleTimeout(task,timeoutMs); |
| 286 | } |
| 287 | |
| 288 | /* ------------------------------------------------------------ */ |
| 289 | public void setCheckForIdle(boolean check) |
| 290 | { |
| 291 | if (check) |
| 292 | { |
| 293 | _idleTimestamp=System.currentTimeMillis(); |
| 294 | _checkIdle=true; |
| 295 | } |
| 296 | else |
| 297 | _checkIdle=false; |
| 298 | } |
| 299 | |
| 300 | /* ------------------------------------------------------------ */ |
| 301 | public boolean isCheckForIdle() |
| 302 | { |
| 303 | return _checkIdle; |
| 304 | } |
| 305 | |
| 306 | /* ------------------------------------------------------------ */ |
| 307 | protected void notIdle() |
| 308 | { |
| 309 | _idleTimestamp=System.currentTimeMillis(); |
| 310 | } |
| 311 | |
| 312 | /* ------------------------------------------------------------ */ |
| 313 | public void checkIdleTimestamp(long now) |
| 314 | { |
| 315 | if (isCheckForIdle() && _maxIdleTime>0) |
| 316 | { |
| 317 | final long idleForMs=now-_idleTimestamp; |
| 318 | |
| 319 | if (idleForMs>_maxIdleTime) |
| 320 | { |
| 321 | // Don't idle out again until onIdleExpired task completes. |
| 322 | setCheckForIdle(false); |
| 323 | _manager.dispatch(new Runnable() |
| 324 | { |
| 325 | public void run() |
| 326 | { |
| 327 | try |
| 328 | { |
| 329 | onIdleExpired(idleForMs); |
| 330 | } |
| 331 | finally |
| 332 | { |
| 333 | setCheckForIdle(true); |
| 334 | } |
| 335 | } |
| 336 | }); |
| 337 | } |
| 338 | } |
| 339 | } |
| 340 | |
| 341 | /* ------------------------------------------------------------ */ |
| 342 | public void onIdleExpired(long idleForMs) |
| 343 | { |
| 344 | try |
| 345 | { |
| 346 | synchronized (this) |
| 347 | { |
| 348 | _onIdle=true; |
| 349 | } |
| 350 | |
| 351 | _connection.onIdleExpired(idleForMs); |
| 352 | } |
| 353 | finally |
| 354 | { |
| 355 | synchronized (this) |
| 356 | { |
| 357 | _onIdle=false; |
| 358 | if (_state==STATE_NEEDS_DISPATCH) |
| 359 | dispatch(); |
| 360 | } |
| 361 | } |
| 362 | } |
| 363 | |
| 364 | /* ------------------------------------------------------------ */ |
| 365 | @Override |
| 366 | public int fill(Buffer buffer) throws IOException |
| 367 | { |
| 368 | int fill=super.fill(buffer); |
| 369 | if (fill>0) |
| 370 | notIdle(); |
| 371 | return fill; |
| 372 | } |
| 373 | |
| 374 | /* ------------------------------------------------------------ */ |
| 375 | @Override |
| 376 | public int flush(Buffer header, Buffer buffer, Buffer trailer) throws IOException |
| 377 | { |
| 378 | int l = super.flush(header, buffer, trailer); |
| 379 | |
| 380 | // If there was something to write and it wasn't written, then we are not writable. |
| 381 | if (l==0 && ( header!=null && header.hasContent() || buffer!=null && buffer.hasContent() || trailer!=null && trailer.hasContent())) |
| 382 | { |
| 383 | synchronized (this) |
| 384 | { |
| 385 | _writable=false; |
| 386 | if (_state<STATE_DISPATCHED) |
| 387 | updateKey(); |
| 388 | } |
| 389 | } |
| 390 | else if (l>0) |
| 391 | { |
| 392 | _writable=true; |
| 393 | notIdle(); |
| 394 | } |
| 395 | return l; |
| 396 | } |
| 397 | |
| 398 | /* ------------------------------------------------------------ */ |
| 399 | /* |
| 400 | */ |
| 401 | @Override |
| 402 | public int flush(Buffer buffer) throws IOException |
| 403 | { |
| 404 | int l = super.flush(buffer); |
| 405 | |
| 406 | // If there was something to write and it wasn't written, then we are not writable. |
| 407 | if (l==0 && buffer!=null && buffer.hasContent()) |
| 408 | { |
| 409 | synchronized (this) |
| 410 | { |
| 411 | _writable=false; |
| 412 | if (_state<STATE_DISPATCHED) |
| 413 | updateKey(); |
| 414 | } |
| 415 | } |
| 416 | else if (l>0) |
| 417 | { |
| 418 | _writable=true; |
| 419 | notIdle(); |
| 420 | } |
| 421 | |
| 422 | return l; |
| 423 | } |
| 424 | |
| 425 | /* ------------------------------------------------------------ */ |
| 426 | /* |
| 427 | * Allows thread to block waiting for further events. |
| 428 | */ |
| 429 | @Override |
| 430 | public boolean blockReadable(long timeoutMs) throws IOException |
| 431 | { |
| 432 | synchronized (this) |
| 433 | { |
| 434 | if (isInputShutdown()) |
| 435 | throw new EofException(); |
| 436 | |
| 437 | long now=_selectSet.getNow(); |
| 438 | long end=now+timeoutMs; |
| 439 | boolean check=isCheckForIdle(); |
| 440 | setCheckForIdle(true); |
| 441 | try |
| 442 | { |
| 443 | _readBlocked=true; |
| 444 | while (!isInputShutdown() && _readBlocked) |
| 445 | { |
| 446 | try |
| 447 | { |
| 448 | updateKey(); |
| 449 | this.wait(timeoutMs>0?(end-now):10000); |
| 450 | } |
| 451 | catch (final InterruptedException e) |
| 452 | { |
| 453 | LOG.warn(e); |
| 454 | if (_interruptable) |
| 455 | throw new InterruptedIOException(){{this.initCause(e);}}; |
| 456 | } |
| 457 | finally |
| 458 | { |
| 459 | now=_selectSet.getNow(); |
| 460 | } |
| 461 | |
| 462 | if (_readBlocked && timeoutMs>0 && now>=end) |
| 463 | return false; |
| 464 | } |
| 465 | } |
| 466 | finally |
| 467 | { |
| 468 | _readBlocked=false; |
| 469 | setCheckForIdle(check); |
| 470 | } |
| 471 | } |
| 472 | return true; |
| 473 | } |
| 474 | |
| 475 | /* ------------------------------------------------------------ */ |
| 476 | /* |
| 477 | * Allows thread to block waiting for further events. |
| 478 | */ |
| 479 | @Override |
| 480 | public boolean blockWritable(long timeoutMs) throws IOException |
| 481 | { |
| 482 | synchronized (this) |
| 483 | { |
| 484 | if (isOutputShutdown()) |
| 485 | throw new EofException(); |
| 486 | |
| 487 | long now=_selectSet.getNow(); |
| 488 | long end=now+timeoutMs; |
| 489 | boolean check=isCheckForIdle(); |
| 490 | setCheckForIdle(true); |
| 491 | try |
| 492 | { |
| 493 | _writeBlocked=true; |
| 494 | while (_writeBlocked && !isOutputShutdown()) |
| 495 | { |
| 496 | try |
| 497 | { |
| 498 | updateKey(); |
| 499 | this.wait(timeoutMs>0?(end-now):10000); |
| 500 | } |
| 501 | catch (final InterruptedException e) |
| 502 | { |
| 503 | LOG.warn(e); |
| 504 | if (_interruptable) |
| 505 | throw new InterruptedIOException(){{this.initCause(e);}}; |
| 506 | } |
| 507 | finally |
| 508 | { |
| 509 | now=_selectSet.getNow(); |
| 510 | } |
| 511 | if (_writeBlocked && timeoutMs>0 && now>=end) |
| 512 | return false; |
| 513 | } |
| 514 | } |
| 515 | finally |
| 516 | { |
| 517 | _writeBlocked=false; |
| 518 | setCheckForIdle(check); |
| 519 | } |
| 520 | } |
| 521 | return true; |
| 522 | } |
| 523 | |
| 524 | /* ------------------------------------------------------------ */ |
| 525 | /** Set the interruptable mode of the endpoint. |
| 526 | * If set to false (default), then interrupts are assumed to be spurious |
| 527 | * and blocking operations continue unless the endpoint has been closed. |
| 528 | * If true, then interrupts of blocking operations result in InterruptedIOExceptions |
| 529 | * being thrown. |
| 530 | * @param interupable |
| 531 | */ |
| 532 | public void setInterruptable(boolean interupable) |
| 533 | { |
| 534 | synchronized (this) |
| 535 | { |
| 536 | _interruptable=interupable; |
| 537 | } |
| 538 | } |
| 539 | |
| 540 | /* ------------------------------------------------------------ */ |
| 541 | public boolean isInterruptable() |
| 542 | { |
| 543 | return _interruptable; |
| 544 | } |
| 545 | |
| 546 | /* ------------------------------------------------------------ */ |
| 547 | /** |
| 548 | * @see org.eclipse.jetty.io.AsyncEndPoint#scheduleWrite() |
| 549 | */ |
| 550 | public void scheduleWrite() |
| 551 | { |
| 552 | if (_writable) |
| 553 | LOG.debug("Required scheduleWrite {}",this); |
| 554 | |
| 555 | _writable=false; |
| 556 | updateKey(); |
| 557 | } |
| 558 | |
| 559 | /* ------------------------------------------------------------ */ |
| 560 | public boolean isWritable() |
| 561 | { |
| 562 | return _writable; |
| 563 | } |
| 564 | |
| 565 | /* ------------------------------------------------------------ */ |
| 566 | public boolean hasProgressed() |
| 567 | { |
| 568 | return false; |
| 569 | } |
| 570 | |
| 571 | /* ------------------------------------------------------------ */ |
| 572 | /** |
| 573 | * Updates selection key. Adds operations types to the selection key as needed. No operations |
| 574 | * are removed as this is only done during dispatch. This method records the new key and |
| 575 | * schedules a call to doUpdateKey to do the keyChange |
| 576 | */ |
| 577 | private void updateKey() |
| 578 | { |
| 579 | final boolean changed; |
| 580 | synchronized (this) |
| 581 | { |
| 582 | int current_ops=-1; |
| 583 | if (getChannel().isOpen()) |
| 584 | { |
| 585 | boolean read_interest = _readBlocked || (_state<STATE_DISPATCHED && !_connection.isSuspended()); |
| 586 | boolean write_interest= _writeBlocked || (_state<STATE_DISPATCHED && !_writable); |
| 587 | |
| 588 | _interestOps = |
| 589 | ((!_socket.isInputShutdown() && read_interest ) ? SelectionKey.OP_READ : 0) |
| 590 | | ((!_socket.isOutputShutdown()&& write_interest) ? SelectionKey.OP_WRITE : 0); |
| 591 | try |
| 592 | { |
| 593 | current_ops = ((_key!=null && _key.isValid())?_key.interestOps():-1); |
| 594 | } |
| 595 | catch(Exception e) |
| 596 | { |
| 597 | _key=null; |
| 598 | LOG.ignore(e); |
| 599 | } |
| 600 | } |
| 601 | changed=_interestOps!=current_ops; |
| 602 | } |
| 603 | |
| 604 | if(changed) |
| 605 | { |
| 606 | _selectSet.addChange(this); |
| 607 | _selectSet.wakeup(); |
| 608 | } |
| 609 | } |
| 610 | |
| 611 | |
| 612 | /* ------------------------------------------------------------ */ |
| 613 | /** |
| 614 | * Synchronize the interestOps with the actual key. Call is scheduled by a call to updateKey |
| 615 | */ |
| 616 | void doUpdateKey() |
| 617 | { |
| 618 | synchronized (this) |
| 619 | { |
| 620 | if (getChannel().isOpen()) |
| 621 | { |
| 622 | if (_interestOps>0) |
| 623 | { |
| 624 | if (_key==null || !_key.isValid()) |
| 625 | { |
| 626 | SelectableChannel sc = (SelectableChannel)getChannel(); |
| 627 | if (sc.isRegistered()) |
| 628 | { |
| 629 | updateKey(); |
| 630 | } |
| 631 | else |
| 632 | { |
| 633 | try |
| 634 | { |
| 635 | _key=((SelectableChannel)getChannel()).register(_selectSet.getSelector(),_interestOps,this); |
| 636 | } |
| 637 | catch (Exception e) |
| 638 | { |
| 639 | LOG.ignore(e); |
| 640 | if (_key!=null && _key.isValid()) |
| 641 | { |
| 642 | _key.cancel(); |
| 643 | } |
| 644 | |
| 645 | if (_open) |
| 646 | { |
| 647 | _selectSet.destroyEndPoint(this); |
| 648 | } |
| 649 | _open=false; |
| 650 | _key = null; |
| 651 | } |
| 652 | } |
| 653 | } |
| 654 | else |
| 655 | { |
| 656 | _key.interestOps(_interestOps); |
| 657 | } |
| 658 | } |
| 659 | else |
| 660 | { |
| 661 | if (_key!=null && _key.isValid()) |
| 662 | _key.interestOps(0); |
| 663 | else |
| 664 | _key=null; |
| 665 | } |
| 666 | } |
| 667 | else |
| 668 | { |
| 669 | if (_key!=null && _key.isValid()) |
| 670 | _key.cancel(); |
| 671 | |
| 672 | if (_open) |
| 673 | { |
| 674 | _open=false; |
| 675 | _selectSet.destroyEndPoint(this); |
| 676 | } |
| 677 | _key = null; |
| 678 | } |
| 679 | } |
| 680 | } |
| 681 | |
| 682 | /* ------------------------------------------------------------ */ |
| 683 | /* |
| 684 | */ |
| 685 | protected void handle() |
| 686 | { |
| 687 | boolean dispatched=true; |
| 688 | try |
| 689 | { |
| 690 | while(dispatched) |
| 691 | { |
| 692 | try |
| 693 | { |
| 694 | while(true) |
| 695 | { |
| 696 | final AsyncConnection next = (AsyncConnection)_connection.handle(); |
| 697 | if (next!=_connection) |
| 698 | { |
| 699 | LOG.debug("{} replaced {}",next,_connection); |
| 700 | Connection old=_connection; |
| 701 | _connection=next; |
| 702 | _manager.endPointUpgraded(this,old); |
| 703 | continue; |
| 704 | } |
| 705 | break; |
| 706 | } |
| 707 | } |
| 708 | catch (ClosedChannelException e) |
| 709 | { |
| 710 | LOG.ignore(e); |
| 711 | } |
| 712 | catch (EofException e) |
| 713 | { |
| 714 | LOG.debug("EOF", e); |
| 715 | try{close();} |
| 716 | catch(IOException e2){LOG.ignore(e2);} |
| 717 | } |
| 718 | catch (IOException e) |
| 719 | { |
| 720 | LOG.warn(e.toString()); |
| 721 | try{close();} |
| 722 | catch(IOException e2){LOG.ignore(e2);} |
| 723 | } |
| 724 | catch (Throwable e) |
| 725 | { |
| 726 | LOG.warn("handle failed", e); |
| 727 | try{close();} |
| 728 | catch(IOException e2){LOG.ignore(e2);} |
| 729 | } |
| 730 | finally |
| 731 | { |
| 732 | if (!_ishut && isInputShutdown() && isOpen()) |
| 733 | { |
| 734 | _ishut=true; |
| 735 | try |
| 736 | { |
| 737 | _connection.onInputShutdown(); |
| 738 | } |
| 739 | catch(Throwable x) |
| 740 | { |
| 741 | LOG.warn("onInputShutdown failed", x); |
| 742 | try{close();} |
| 743 | catch(IOException e2){LOG.ignore(e2);} |
| 744 | } |
| 745 | finally |
| 746 | { |
| 747 | updateKey(); |
| 748 | } |
| 749 | } |
| 750 | dispatched=!undispatch(); |
| 751 | } |
| 752 | } |
| 753 | } |
| 754 | finally |
| 755 | { |
| 756 | if (dispatched) |
| 757 | { |
| 758 | dispatched=!undispatch(); |
| 759 | while (dispatched) |
| 760 | { |
| 761 | LOG.warn("SCEP.run() finally DISPATCHED"); |
| 762 | dispatched=!undispatch(); |
| 763 | } |
| 764 | } |
| 765 | } |
| 766 | } |
| 767 | |
| 768 | /* ------------------------------------------------------------ */ |
| 769 | /* |
| 770 | * @see org.eclipse.io.nio.ChannelEndPoint#close() |
| 771 | */ |
| 772 | @Override |
| 773 | public void close() throws IOException |
| 774 | { |
| 775 | // On unix systems there is a JVM issue that if you cancel before closing, it can |
| 776 | // cause the selector to block waiting for a channel to close and that channel can |
| 777 | // block waiting for the remote end. But on windows, if you don't cancel before a |
| 778 | // close, then the selector can block anyway! |
| 779 | // https://bugs.eclipse.org/bugs/show_bug.cgi?id=357318 |
| 780 | if (WORK_AROUND_JVM_BUG_6346658) |
| 781 | { |
| 782 | try |
| 783 | { |
| 784 | SelectionKey key = _key; |
| 785 | if (key!=null) |
| 786 | key.cancel(); |
| 787 | } |
| 788 | catch (Throwable e) |
| 789 | { |
| 790 | LOG.ignore(e); |
| 791 | } |
| 792 | } |
| 793 | |
| 794 | try |
| 795 | { |
| 796 | super.close(); |
| 797 | } |
| 798 | catch (IOException e) |
| 799 | { |
| 800 | LOG.ignore(e); |
| 801 | } |
| 802 | finally |
| 803 | { |
| 804 | updateKey(); |
| 805 | } |
| 806 | } |
| 807 | |
| 808 | /* ------------------------------------------------------------ */ |
| 809 | @Override |
| 810 | public String toString() |
| 811 | { |
| 812 | // Do NOT use synchronized (this) |
| 813 | // because it's very easy to deadlock when debugging is enabled. |
| 814 | // We do a best effort to print the right toString() and that's it. |
| 815 | SelectionKey key = _key; |
| 816 | String keyString = ""; |
| 817 | if (key != null) |
| 818 | { |
| 819 | if (key.isValid()) |
| 820 | { |
| 821 | if (key.isReadable()) |
| 822 | keyString += "r"; |
| 823 | if (key.isWritable()) |
| 824 | keyString += "w"; |
| 825 | } |
| 826 | else |
| 827 | { |
| 828 | keyString += "!"; |
| 829 | } |
| 830 | } |
| 831 | else |
| 832 | { |
| 833 | keyString += "-"; |
| 834 | } |
| 835 | return String.format("SCEP@%x{l(%s)<->r(%s),s=%d,open=%b,ishut=%b,oshut=%b,rb=%b,wb=%b,w=%b,i=%d%s}-{%s}", |
| 836 | hashCode(), |
| 837 | _socket.getRemoteSocketAddress(), |
| 838 | _socket.getLocalSocketAddress(), |
| 839 | _state, |
| 840 | isOpen(), |
| 841 | isInputShutdown(), |
| 842 | isOutputShutdown(), |
| 843 | _readBlocked, |
| 844 | _writeBlocked, |
| 845 | _writable, |
| 846 | _interestOps, |
| 847 | keyString, |
| 848 | _connection); |
| 849 | } |
| 850 | |
| 851 | /* ------------------------------------------------------------ */ |
| 852 | public SelectSet getSelectSet() |
| 853 | { |
| 854 | return _selectSet; |
| 855 | } |
| 856 | |
| 857 | /* ------------------------------------------------------------ */ |
| 858 | /** |
| 859 | * Don't set the SoTimeout |
| 860 | * @see org.eclipse.jetty.io.nio.ChannelEndPoint#setMaxIdleTime(int) |
| 861 | */ |
| 862 | @Override |
| 863 | public void setMaxIdleTime(int timeMs) throws IOException |
| 864 | { |
| 865 | _maxIdleTime=timeMs; |
| 866 | } |
| 867 | |
| 868 | } |