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annotate src/org/eclipse/jetty/io/nio/SelectChannelEndPoint.java @ 914:54308d65265a
simplify SelectorManager
| author | Franklin Schmidt <fschmidt@gmail.com> |
|---|---|
| date | Sun, 09 Oct 2016 01:22:55 -0600 |
| parents | 6b210bb66c63 |
| children | 65e0fba5861a |
| rev | line source |
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1 // |
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2 // ======================================================================== |
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3 // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd. |
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4 // ------------------------------------------------------------------------ |
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5 // All rights reserved. This program and the accompanying materials |
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6 // are made available under the terms of the Eclipse Public License v1.0 |
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7 // and Apache License v2.0 which accompanies this distribution. |
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8 // |
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9 // The Eclipse Public License is available at |
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10 // http://www.eclipse.org/legal/epl-v10.html |
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11 // |
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12 // The Apache License v2.0 is available at |
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13 // http://www.opensource.org/licenses/apache2.0.php |
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14 // |
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15 // You may elect to redistribute this code under either of these licenses. |
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16 // ======================================================================== |
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17 // |
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18 |
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19 package org.eclipse.jetty.io.nio; |
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20 |
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21 import java.io.IOException; |
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22 import java.io.InterruptedIOException; |
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23 import java.nio.channels.ClosedChannelException; |
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24 import java.nio.channels.SelectableChannel; |
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25 import java.nio.channels.SelectionKey; |
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26 import java.nio.channels.SocketChannel; |
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27 import java.util.Locale; |
| 865 | 28 import java.util.concurrent.RejectedExecutionException; |
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29 |
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30 import org.eclipse.jetty.io.AsyncEndPoint; |
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31 import org.eclipse.jetty.io.Buffer; |
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32 import org.eclipse.jetty.io.ConnectedEndPoint; |
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33 import org.eclipse.jetty.io.Connection; |
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34 import org.eclipse.jetty.io.EofException; |
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35 import org.eclipse.jetty.io.nio.SelectorManager.SelectSet; |
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36 import org.slf4j.Logger; |
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37 import org.slf4j.LoggerFactory; |
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38 import org.eclipse.jetty.util.thread.Timeout.Task; |
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39 |
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40 /* ------------------------------------------------------------ */ |
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41 /** |
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42 * An Endpoint that can be scheduled by {@link SelectorManager}. |
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43 */ |
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44 public class SelectChannelEndPoint extends ChannelEndPoint implements AsyncEndPoint, ConnectedEndPoint |
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45 { |
| 865 | 46 public static final Logger LOG=LoggerFactory.getLogger("org.eclipse.jetty.io.nio"); |
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47 |
| 865 | 48 private final boolean WORK_AROUND_JVM_BUG_6346658 = System.getProperty("os.name").toLowerCase(Locale.ENGLISH).contains("win"); |
| 49 private final SelectorManager.SelectSet _selectSet; | |
| 50 private final SelectorManager _manager; | |
| 51 private SelectionKey _key; | |
| 52 private final Runnable _handler = new Runnable() | |
| 53 { | |
| 54 public void run() { handle(); } | |
| 55 }; | |
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56 |
| 865 | 57 /** The desired value for {@link SelectionKey#interestOps()} */ |
| 58 private int _interestOps; | |
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59 |
| 865 | 60 /** |
| 61 * The connection instance is the handler for any IO activity on the endpoint. | |
| 62 * There is a different type of connection for HTTP, AJP, WebSocket and | |
| 63 * ProxyConnect. The connection may change for an SCEP as it is upgraded | |
| 64 * from HTTP to proxy connect or websocket. | |
| 65 */ | |
| 66 private volatile AsyncConnection _connection; | |
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67 |
| 865 | 68 private static final int STATE_NEEDS_DISPATCH=-1; |
| 69 private static final int STATE_UNDISPATCHED=0; | |
| 70 private static final int STATE_DISPATCHED=1; | |
| 71 private static final int STATE_ASYNC=2; | |
| 72 private int _state; | |
| 73 | |
| 74 private boolean _onIdle; | |
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75 |
| 865 | 76 /** true if the last write operation succeed and wrote all offered bytes */ |
| 77 private volatile boolean _writable = true; | |
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78 |
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79 |
| 865 | 80 /** True if a thread has is blocked in {@link #blockReadable(long)} */ |
| 81 private boolean _readBlocked; | |
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82 |
| 865 | 83 /** True if a thread has is blocked in {@link #blockWritable(long)} */ |
| 84 private boolean _writeBlocked; | |
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85 |
| 865 | 86 /** true if {@link SelectSet#destroyEndPoint(SelectChannelEndPoint)} has not been called */ |
| 87 private boolean _open; | |
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88 |
| 865 | 89 private volatile long _idleTimestamp; |
| 90 private volatile boolean _checkIdle; | |
| 91 | |
| 92 private boolean _interruptable; | |
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93 |
| 865 | 94 private boolean _ishut; |
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95 |
| 865 | 96 /* ------------------------------------------------------------ */ |
| 97 public SelectChannelEndPoint(SocketChannel channel, SelectSet selectSet, SelectionKey key, int maxIdleTime) | |
| 98 throws IOException | |
| 99 { | |
| 100 super(channel, maxIdleTime); | |
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101 |
| 865 | 102 _manager = selectSet.getManager(); |
| 103 _selectSet = selectSet; | |
| 104 _state=STATE_UNDISPATCHED; | |
| 105 _onIdle=false; | |
| 106 _open=true; | |
| 107 _key = key; | |
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108 |
| 865 | 109 setCheckForIdle(true); |
| 110 } | |
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111 |
| 865 | 112 /* ------------------------------------------------------------ */ |
| 113 public SelectionKey getSelectionKey() | |
| 114 { | |
| 115 synchronized (this) | |
| 116 { | |
| 117 return _key; | |
| 118 } | |
| 119 } | |
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120 |
| 865 | 121 /* ------------------------------------------------------------ */ |
| 122 public SelectorManager getSelectManager() | |
| 123 { | |
| 124 return _manager; | |
| 125 } | |
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126 |
| 865 | 127 /* ------------------------------------------------------------ */ |
| 128 public Connection getConnection() | |
| 129 { | |
| 130 return _connection; | |
| 131 } | |
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132 |
| 865 | 133 /* ------------------------------------------------------------ */ |
| 134 public void setConnection(Connection connection) | |
| 135 { | |
| 136 _connection=(AsyncConnection)connection; | |
| 137 } | |
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138 |
| 865 | 139 /* ------------------------------------------------------------ */ |
| 140 public long getIdleTimestamp() | |
| 141 { | |
| 142 return _idleTimestamp; | |
| 143 } | |
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144 |
| 865 | 145 /* ------------------------------------------------------------ */ |
| 146 /** Called by selectSet to schedule handling | |
| 147 * | |
| 148 */ | |
| 149 public void schedule() | |
| 150 { | |
| 151 synchronized (this) | |
| 152 { | |
| 153 // If there is no key, then do nothing | |
| 154 if (_key == null || !_key.isValid()) | |
| 155 { | |
| 156 _readBlocked=false; | |
| 157 _writeBlocked=false; | |
| 158 this.notifyAll(); | |
| 159 return; | |
| 160 } | |
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161 |
| 865 | 162 // If there are threads dispatched reading and writing |
| 163 if (_readBlocked || _writeBlocked) | |
| 164 { | |
| 165 // assert _dispatched; | |
| 166 if (_readBlocked && _key.isReadable()) | |
| 167 _readBlocked=false; | |
| 168 if (_writeBlocked && _key.isWritable()) | |
| 169 _writeBlocked=false; | |
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170 |
| 865 | 171 // wake them up is as good as a dispatched. |
| 172 this.notifyAll(); | |
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173 |
| 865 | 174 // we are not interested in further selecting |
| 175 _key.interestOps(0); | |
| 176 if (_state<STATE_DISPATCHED) | |
| 177 updateKey(); | |
| 178 return; | |
| 179 } | |
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180 |
| 865 | 181 // Remove writeable op |
| 182 if ((_key.readyOps() & SelectionKey.OP_WRITE) == SelectionKey.OP_WRITE && (_key.interestOps() & SelectionKey.OP_WRITE) == SelectionKey.OP_WRITE) | |
| 183 { | |
| 184 // Remove writeable op | |
| 185 _interestOps = _key.interestOps() & ~SelectionKey.OP_WRITE; | |
| 186 _key.interestOps(_interestOps); | |
| 187 _writable = true; // Once writable is in ops, only removed with dispatch. | |
| 188 } | |
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189 |
| 865 | 190 // If dispatched, then deregister interest |
| 191 if (_state>=STATE_DISPATCHED) | |
| 192 _key.interestOps(0); | |
| 193 else | |
| 194 { | |
| 195 // other wise do the dispatch | |
| 196 dispatch(); | |
| 197 } | |
| 198 } | |
| 199 } | |
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200 |
| 865 | 201 /* ------------------------------------------------------------ */ |
| 202 public void asyncDispatch() | |
| 203 { | |
| 204 synchronized(this) | |
| 205 { | |
| 206 switch(_state) | |
| 207 { | |
| 208 case STATE_NEEDS_DISPATCH: | |
| 209 case STATE_UNDISPATCHED: | |
| 210 dispatch(); | |
| 211 break; | |
| 212 | |
| 213 case STATE_DISPATCHED: | |
| 214 case STATE_ASYNC: | |
| 215 _state=STATE_ASYNC; | |
| 216 break; | |
| 217 } | |
| 218 } | |
| 219 } | |
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220 |
| 865 | 221 /* ------------------------------------------------------------ */ |
| 222 public void dispatch() | |
| 223 { | |
| 224 synchronized(this) | |
| 225 { | |
| 226 if (_state<=STATE_UNDISPATCHED) | |
| 227 { | |
| 228 if (_onIdle) | |
| 229 _state = STATE_NEEDS_DISPATCH; | |
| 230 else | |
| 231 { | |
| 232 _state = STATE_DISPATCHED; | |
| 233 try { | |
| 234 _manager.execute(_handler); | |
| 235 } catch(RejectedExecutionException e) { | |
| 236 _state = STATE_NEEDS_DISPATCH; | |
| 237 LOG.warn("Dispatched Failed! "+this+" to "+_manager); | |
| 238 updateKey(); | |
| 239 } | |
| 240 } | |
| 241 } | |
| 242 } | |
| 243 } | |
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244 |
| 865 | 245 /* ------------------------------------------------------------ */ |
| 246 /** | |
| 247 * Called when a dispatched thread is no longer handling the endpoint. | |
| 248 * The selection key operations are updated. | |
| 249 * @return If false is returned, the endpoint has been redispatched and | |
| 250 * thread must keep handling the endpoint. | |
| 251 */ | |
| 252 protected boolean undispatch() | |
| 253 { | |
| 254 synchronized (this) | |
| 255 { | |
| 256 switch(_state) | |
| 257 { | |
| 258 case STATE_ASYNC: | |
| 259 _state=STATE_DISPATCHED; | |
| 260 return false; | |
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261 |
| 865 | 262 default: |
| 263 _state=STATE_UNDISPATCHED; | |
| 264 updateKey(); | |
| 265 return true; | |
| 266 } | |
| 267 } | |
| 268 } | |
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269 |
| 865 | 270 /* ------------------------------------------------------------ */ |
| 271 public void cancelTimeout(Task task) | |
| 272 { | |
| 273 getSelectSet().cancelTimeout(task); | |
| 274 } | |
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275 |
| 865 | 276 /* ------------------------------------------------------------ */ |
| 277 public void scheduleTimeout(Task task, long timeoutMs) | |
| 278 { | |
| 279 getSelectSet().scheduleTimeout(task,timeoutMs); | |
| 280 } | |
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281 |
| 865 | 282 /* ------------------------------------------------------------ */ |
| 283 public void setCheckForIdle(boolean check) | |
| 284 { | |
| 285 if (check) | |
| 286 { | |
| 287 _idleTimestamp=System.currentTimeMillis(); | |
| 288 _checkIdle=true; | |
| 289 } | |
| 290 else | |
| 291 _checkIdle=false; | |
| 292 } | |
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293 |
| 865 | 294 /* ------------------------------------------------------------ */ |
| 295 public boolean isCheckForIdle() | |
| 296 { | |
| 297 return _checkIdle; | |
| 298 } | |
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299 |
| 865 | 300 /* ------------------------------------------------------------ */ |
| 301 protected void notIdle() | |
| 302 { | |
| 303 _idleTimestamp=System.currentTimeMillis(); | |
| 304 } | |
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305 |
| 865 | 306 /* ------------------------------------------------------------ */ |
| 307 public void checkIdleTimestamp(long now) | |
| 308 { | |
| 309 if (isCheckForIdle() && _maxIdleTime>0) | |
| 310 { | |
| 311 final long idleForMs=now-_idleTimestamp; | |
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312 |
| 865 | 313 if (idleForMs>_maxIdleTime) |
| 314 { | |
| 315 // Don't idle out again until onIdleExpired task completes. | |
| 316 setCheckForIdle(false); | |
| 317 _manager.execute(new Runnable() | |
| 318 { | |
| 319 public void run() | |
| 320 { | |
| 321 try | |
| 322 { | |
| 323 onIdleExpired(idleForMs); | |
| 324 } | |
| 325 finally | |
| 326 { | |
| 327 setCheckForIdle(true); | |
| 328 } | |
| 329 } | |
| 330 }); | |
| 331 } | |
| 332 } | |
| 333 } | |
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334 |
| 865 | 335 /* ------------------------------------------------------------ */ |
| 336 public void onIdleExpired(long idleForMs) | |
| 337 { | |
| 338 try | |
| 339 { | |
| 340 synchronized (this) | |
| 341 { | |
| 342 _onIdle=true; | |
| 343 } | |
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344 |
| 865 | 345 _connection.onIdleExpired(idleForMs); |
| 346 } | |
| 347 finally | |
| 348 { | |
| 349 synchronized (this) | |
| 350 { | |
| 351 _onIdle=false; | |
| 352 if (_state==STATE_NEEDS_DISPATCH) | |
| 353 dispatch(); | |
| 354 } | |
| 355 } | |
| 356 } | |
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357 |
| 865 | 358 /* ------------------------------------------------------------ */ |
| 359 @Override | |
| 360 public int fill(Buffer buffer) throws IOException | |
| 361 { | |
| 362 int fill=super.fill(buffer); | |
| 363 if (fill>0) | |
| 364 notIdle(); | |
| 365 return fill; | |
| 366 } | |
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367 |
| 865 | 368 /* ------------------------------------------------------------ */ |
| 369 @Override | |
| 370 public int flush(Buffer header, Buffer buffer, Buffer trailer) throws IOException | |
| 371 { | |
| 372 int l = super.flush(header, buffer, trailer); | |
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373 |
| 865 | 374 // If there was something to write and it wasn't written, then we are not writable. |
| 375 if (l==0 && ( header!=null && header.hasContent() || buffer!=null && buffer.hasContent() || trailer!=null && trailer.hasContent())) | |
| 376 { | |
| 377 synchronized (this) | |
| 378 { | |
| 379 _writable=false; | |
| 380 if (_state<STATE_DISPATCHED) | |
| 381 updateKey(); | |
| 382 } | |
| 383 } | |
| 384 else if (l>0) | |
| 385 { | |
| 386 _writable=true; | |
| 387 notIdle(); | |
| 388 } | |
| 389 return l; | |
| 390 } | |
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391 |
| 865 | 392 /* ------------------------------------------------------------ */ |
| 393 /* | |
| 394 */ | |
| 395 @Override | |
| 396 public int flush(Buffer buffer) throws IOException | |
| 397 { | |
| 398 int l = super.flush(buffer); | |
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399 |
| 865 | 400 // If there was something to write and it wasn't written, then we are not writable. |
| 401 if (l==0 && buffer!=null && buffer.hasContent()) | |
| 402 { | |
| 403 synchronized (this) | |
| 404 { | |
| 405 _writable=false; | |
| 406 if (_state<STATE_DISPATCHED) | |
| 407 updateKey(); | |
| 408 } | |
| 409 } | |
| 410 else if (l>0) | |
| 411 { | |
| 412 _writable=true; | |
| 413 notIdle(); | |
| 414 } | |
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415 |
| 865 | 416 return l; |
| 417 } | |
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418 |
| 865 | 419 /* ------------------------------------------------------------ */ |
| 420 /* | |
| 421 * Allows thread to block waiting for further events. | |
| 422 */ | |
| 423 @Override | |
| 424 public boolean blockReadable(long timeoutMs) throws IOException | |
| 425 { | |
| 426 synchronized (this) | |
| 427 { | |
| 428 if (isInputShutdown()) | |
| 429 throw new EofException(); | |
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430 |
| 865 | 431 long now=_selectSet.getNow(); |
| 432 long end=now+timeoutMs; | |
| 433 boolean check=isCheckForIdle(); | |
| 434 setCheckForIdle(true); | |
| 435 try | |
| 436 { | |
| 437 _readBlocked=true; | |
| 438 while (!isInputShutdown() && _readBlocked) | |
| 439 { | |
| 440 try | |
| 441 { | |
| 442 updateKey(); | |
| 443 this.wait(timeoutMs>0?(end-now):10000); | |
| 444 } | |
| 445 catch (final InterruptedException e) | |
| 446 { | |
| 447 LOG.warn("",e); | |
| 448 if (_interruptable) | |
| 449 throw new InterruptedIOException(){{this.initCause(e);}}; | |
| 450 } | |
| 451 finally | |
| 452 { | |
| 453 now=_selectSet.getNow(); | |
| 454 } | |
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455 |
| 865 | 456 if (_readBlocked && timeoutMs>0 && now>=end) |
| 457 return false; | |
| 458 } | |
| 459 } | |
| 460 finally | |
| 461 { | |
| 462 _readBlocked=false; | |
| 463 setCheckForIdle(check); | |
| 464 } | |
| 465 } | |
| 466 return true; | |
| 467 } | |
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468 |
| 865 | 469 /* ------------------------------------------------------------ */ |
| 470 /* | |
| 471 * Allows thread to block waiting for further events. | |
| 472 */ | |
| 473 @Override | |
| 474 public boolean blockWritable(long timeoutMs) throws IOException | |
| 475 { | |
| 476 synchronized (this) | |
| 477 { | |
| 478 if (isOutputShutdown()) | |
| 479 throw new EofException(); | |
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480 |
| 865 | 481 long now=_selectSet.getNow(); |
| 482 long end=now+timeoutMs; | |
| 483 boolean check=isCheckForIdle(); | |
| 484 setCheckForIdle(true); | |
| 485 try | |
| 486 { | |
| 487 _writeBlocked=true; | |
| 488 while (_writeBlocked && !isOutputShutdown()) | |
| 489 { | |
| 490 try | |
| 491 { | |
| 492 updateKey(); | |
| 493 this.wait(timeoutMs>0?(end-now):10000); | |
| 494 } | |
| 495 catch (final InterruptedException e) | |
| 496 { | |
| 497 LOG.warn("",e); | |
| 498 if (_interruptable) | |
| 499 throw new InterruptedIOException(){{this.initCause(e);}}; | |
| 500 } | |
| 501 finally | |
| 502 { | |
| 503 now=_selectSet.getNow(); | |
| 504 } | |
| 505 if (_writeBlocked && timeoutMs>0 && now>=end) | |
| 506 return false; | |
| 507 } | |
| 508 } | |
| 509 finally | |
| 510 { | |
| 511 _writeBlocked=false; | |
| 512 setCheckForIdle(check); | |
| 513 } | |
| 514 } | |
| 515 return true; | |
| 516 } | |
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517 |
| 865 | 518 /* ------------------------------------------------------------ */ |
| 519 /** Set the interruptable mode of the endpoint. | |
| 520 * If set to false (default), then interrupts are assumed to be spurious | |
| 521 * and blocking operations continue unless the endpoint has been closed. | |
| 522 * If true, then interrupts of blocking operations result in InterruptedIOExceptions | |
| 523 * being thrown. | |
| 524 * @param interupable | |
| 525 */ | |
| 526 public void setInterruptable(boolean interupable) | |
| 527 { | |
| 528 synchronized (this) | |
| 529 { | |
| 530 _interruptable=interupable; | |
| 531 } | |
| 532 } | |
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533 |
| 865 | 534 /* ------------------------------------------------------------ */ |
| 535 public boolean isInterruptable() | |
| 536 { | |
| 537 return _interruptable; | |
| 538 } | |
| 539 | |
| 540 /* ------------------------------------------------------------ */ | |
| 541 /** | |
| 542 * @see org.eclipse.jetty.io.AsyncEndPoint#scheduleWrite() | |
| 543 */ | |
| 544 public void scheduleWrite() | |
| 545 { | |
| 546 if (_writable) | |
| 547 LOG.debug("Required scheduleWrite {}",this); | |
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548 |
| 865 | 549 _writable=false; |
| 550 updateKey(); | |
| 551 } | |
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552 |
| 865 | 553 /* ------------------------------------------------------------ */ |
| 554 public boolean isWritable() | |
| 555 { | |
| 556 return _writable; | |
| 557 } | |
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558 |
| 865 | 559 /* ------------------------------------------------------------ */ |
| 560 public boolean hasProgressed() | |
| 561 { | |
| 562 return false; | |
| 563 } | |
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564 |
| 865 | 565 /* ------------------------------------------------------------ */ |
| 566 /** | |
| 567 * Updates selection key. Adds operations types to the selection key as needed. No operations | |
| 568 * are removed as this is only done during dispatch. This method records the new key and | |
| 569 * schedules a call to doUpdateKey to do the keyChange | |
| 570 */ | |
| 571 private void updateKey() | |
| 572 { | |
| 573 final boolean changed; | |
| 574 synchronized (this) | |
| 575 { | |
| 576 int current_ops=-1; | |
| 577 if (getChannel().isOpen()) | |
| 578 { | |
| 579 boolean read_interest = _readBlocked || (_state<STATE_DISPATCHED && !_connection.isSuspended()); | |
| 580 boolean write_interest= _writeBlocked || (_state<STATE_DISPATCHED && !_writable); | |
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581 |
| 865 | 582 _interestOps = |
| 583 ((!_socket.isInputShutdown() && read_interest ) ? SelectionKey.OP_READ : 0) | |
| 584 | ((!_socket.isOutputShutdown()&& write_interest) ? SelectionKey.OP_WRITE : 0); | |
| 585 try | |
| 586 { | |
| 587 current_ops = ((_key!=null && _key.isValid())?_key.interestOps():-1); | |
| 588 } | |
| 589 catch(Exception e) | |
| 590 { | |
| 591 _key=null; | |
| 592 LOG.trace("",e); | |
| 593 } | |
| 594 } | |
| 595 changed=_interestOps!=current_ops; | |
| 596 } | |
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597 |
| 865 | 598 if(changed) |
| 599 { | |
| 600 _selectSet.addChange(this); | |
| 601 _selectSet.wakeup(); | |
| 602 } | |
| 603 } | |
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604 |
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605 |
| 865 | 606 /* ------------------------------------------------------------ */ |
| 607 /** | |
| 608 * Synchronize the interestOps with the actual key. Call is scheduled by a call to updateKey | |
| 609 */ | |
| 610 void doUpdateKey() | |
| 611 { | |
| 612 synchronized (this) | |
| 613 { | |
| 614 if (getChannel().isOpen()) | |
| 615 { | |
| 616 if (_interestOps>0) | |
| 617 { | |
| 618 if (_key==null || !_key.isValid()) | |
| 619 { | |
| 620 SelectableChannel sc = (SelectableChannel)getChannel(); | |
| 621 if (sc.isRegistered()) | |
| 622 { | |
| 623 updateKey(); | |
| 624 } | |
| 625 else | |
| 626 { | |
| 627 try | |
| 628 { | |
| 629 _key=((SelectableChannel)getChannel()).register(_selectSet.getSelector(),_interestOps,this); | |
| 630 } | |
| 631 catch (Exception e) | |
| 632 { | |
| 633 LOG.trace("",e); | |
| 634 if (_key!=null && _key.isValid()) | |
| 635 { | |
| 636 _key.cancel(); | |
| 637 } | |
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638 |
| 865 | 639 if (_open) |
| 640 { | |
| 641 _selectSet.destroyEndPoint(this); | |
| 642 } | |
| 643 _open=false; | |
| 644 _key = null; | |
| 645 } | |
| 646 } | |
| 647 } | |
| 648 else | |
| 649 { | |
| 650 _key.interestOps(_interestOps); | |
| 651 } | |
| 652 } | |
| 653 else | |
| 654 { | |
| 655 if (_key!=null && _key.isValid()) | |
| 656 _key.interestOps(0); | |
| 657 else | |
| 658 _key=null; | |
| 659 } | |
| 660 } | |
| 661 else | |
| 662 { | |
| 663 if (_key!=null && _key.isValid()) | |
| 664 _key.cancel(); | |
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665 |
| 865 | 666 if (_open) |
| 667 { | |
| 668 _open=false; | |
| 669 _selectSet.destroyEndPoint(this); | |
| 670 } | |
| 671 _key = null; | |
| 672 } | |
| 673 } | |
| 674 } | |
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675 |
| 865 | 676 /* ------------------------------------------------------------ */ |
| 677 /* | |
| 678 */ | |
| 679 protected void handle() | |
| 680 { | |
| 681 boolean dispatched=true; | |
| 682 try | |
| 683 { | |
| 684 while(dispatched) | |
| 685 { | |
| 686 try | |
| 687 { | |
| 688 while(true) | |
| 689 { | |
| 690 final AsyncConnection next = (AsyncConnection)_connection.handle(); | |
| 691 if (next!=_connection) | |
| 692 { | |
| 693 LOG.debug("{} replaced {}",next,_connection); | |
| 694 _connection=next; | |
| 695 continue; | |
| 696 } | |
| 697 break; | |
| 698 } | |
| 699 } | |
| 700 catch (ClosedChannelException e) | |
| 701 { | |
| 702 LOG.trace("",e); | |
| 703 } | |
| 704 catch (EofException e) | |
| 705 { | |
| 706 LOG.debug("EOF", e); | |
| 707 try{close();} | |
| 708 catch(IOException e2){LOG.trace("",e2);} | |
| 709 } | |
| 710 catch (IOException e) | |
| 711 { | |
| 712 LOG.warn(e.toString()); | |
| 713 try{close();} | |
| 714 catch(IOException e2){LOG.trace("",e2);} | |
| 715 } | |
| 716 catch (Throwable e) | |
| 717 { | |
| 718 LOG.warn("handle failed", e); | |
| 719 try{close();} | |
| 720 catch(IOException e2){LOG.trace("",e2);} | |
| 721 } | |
| 722 finally | |
| 723 { | |
| 724 if (!_ishut && isInputShutdown() && isOpen()) | |
| 725 { | |
| 726 _ishut=true; | |
| 727 try | |
| 728 { | |
| 729 _connection.onInputShutdown(); | |
| 730 } | |
| 731 catch(Throwable x) | |
| 732 { | |
| 733 LOG.warn("onInputShutdown failed", x); | |
| 734 try{close();} | |
| 735 catch(IOException e2){LOG.trace("",e2);} | |
| 736 } | |
| 737 finally | |
| 738 { | |
| 739 updateKey(); | |
| 740 } | |
| 741 } | |
| 742 dispatched=!undispatch(); | |
| 743 } | |
| 744 } | |
| 745 } | |
| 746 finally | |
| 747 { | |
| 748 if (dispatched) | |
| 749 { | |
| 750 dispatched=!undispatch(); | |
| 751 while (dispatched) | |
| 752 { | |
| 753 LOG.warn("SCEP.run() finally DISPATCHED"); | |
| 754 dispatched=!undispatch(); | |
| 755 } | |
| 756 } | |
| 757 } | |
| 758 } | |
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|
759 |
| 865 | 760 /* ------------------------------------------------------------ */ |
| 761 /* | |
| 762 * @see org.eclipse.io.nio.ChannelEndPoint#close() | |
| 763 */ | |
| 764 @Override | |
| 765 public void close() throws IOException | |
| 766 { | |
| 767 // On unix systems there is a JVM issue that if you cancel before closing, it can | |
| 768 // cause the selector to block waiting for a channel to close and that channel can | |
| 769 // block waiting for the remote end. But on windows, if you don't cancel before a | |
| 770 // close, then the selector can block anyway! | |
| 771 // https://bugs.eclipse.org/bugs/show_bug.cgi?id=357318 | |
| 772 if (WORK_AROUND_JVM_BUG_6346658) | |
| 773 { | |
| 774 try | |
| 775 { | |
| 776 SelectionKey key = _key; | |
| 777 if (key!=null) | |
| 778 key.cancel(); | |
| 779 } | |
| 780 catch (Throwable e) | |
| 781 { | |
| 782 LOG.trace("",e); | |
| 783 } | |
| 784 } | |
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|
785 |
| 865 | 786 try |
| 787 { | |
| 788 super.close(); | |
| 789 } | |
| 790 catch (IOException e) | |
| 791 { | |
| 792 LOG.trace("",e); | |
| 793 } | |
| 794 finally | |
| 795 { | |
| 796 updateKey(); | |
| 797 } | |
| 798 } | |
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|
799 |
| 865 | 800 /* ------------------------------------------------------------ */ |
| 801 @Override | |
| 802 public String toString() | |
| 803 { | |
| 804 // Do NOT use synchronized (this) | |
| 805 // because it's very easy to deadlock when debugging is enabled. | |
| 806 // We do a best effort to print the right toString() and that's it. | |
| 807 SelectionKey key = _key; | |
| 808 String keyString = ""; | |
| 809 if (key != null) | |
| 810 { | |
| 811 if (key.isValid()) | |
| 812 { | |
| 813 if (key.isReadable()) | |
| 814 keyString += "r"; | |
| 815 if (key.isWritable()) | |
| 816 keyString += "w"; | |
| 817 } | |
| 818 else | |
| 819 { | |
| 820 keyString += "!"; | |
| 821 } | |
| 822 } | |
| 823 else | |
| 824 { | |
| 825 keyString += "-"; | |
| 826 } | |
| 827 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}", | |
| 828 hashCode(), | |
| 829 _socket.getRemoteSocketAddress(), | |
| 830 _socket.getLocalSocketAddress(), | |
| 831 _state, | |
| 832 isOpen(), | |
| 833 isInputShutdown(), | |
| 834 isOutputShutdown(), | |
| 835 _readBlocked, | |
| 836 _writeBlocked, | |
| 837 _writable, | |
| 838 _interestOps, | |
| 839 keyString, | |
| 840 _connection); | |
| 841 } | |
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842 |
| 865 | 843 /* ------------------------------------------------------------ */ |
| 844 public SelectSet getSelectSet() | |
| 845 { | |
| 846 return _selectSet; | |
| 847 } | |
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848 |
| 865 | 849 /* ------------------------------------------------------------ */ |
| 850 /** | |
| 851 * Don't set the SoTimeout | |
| 852 * @see org.eclipse.jetty.io.nio.ChannelEndPoint#setMaxIdleTime(int) | |
| 853 */ | |
| 854 @Override | |
| 855 public void setMaxIdleTime(int timeMs) throws IOException | |
| 856 { | |
| 857 _maxIdleTime=timeMs; | |
| 858 } | |
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859 |
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860 } |