| 1 | package dmg.cells.nucleus ; |
| 2 | import dmg.util.Args ; |
| 3 | import dmg.util.CollectionFactory; |
| 4 | import java.io.*; |
| 5 | import java.util.* ; |
| 6 | import java.util.concurrent.atomic.AtomicInteger; |
| 7 | import java.lang.reflect.* ; |
| 8 | import java.text.*; |
| 9 | |
| 10 | import org.slf4j.Logger; |
| 11 | import org.slf4j.LoggerFactory; |
| 12 | // |
| 13 | // package |
| 14 | // |
| 15 | /** |
| 16 | * |
| 17 | * |
| 18 | * @author Patrick Fuhrmann |
| 19 | * @version 0.1, 15 Feb 1998 |
| 20 | */ |
| 21 | class CellGlue { |
| 22 | |
| 23 | private final String _cellDomainName ; |
| 24 | private final Map<String, CellNucleus> _cellList = |
| 25 | CollectionFactory.newConcurrentHashMap(); |
| 26 | private final Map<String,List<CellEventListener>> _cellEventListener = |
| 27 | CollectionFactory.newConcurrentHashMap(); |
| 28 | private final Map<String, CellNucleus> _killedCellList = |
| 29 | CollectionFactory.newConcurrentHashMap(); |
| 30 | private final Map<String, Object> _cellContext = |
| 31 | CollectionFactory.newConcurrentHashMap(); |
| 32 | private final AtomicInteger _uniqueCounter = new AtomicInteger(100) ; |
| 33 | public int _printoutLevel = 0 ; |
| 34 | public int _defPrintoutLevel = CellNucleus.PRINT_ERRORS ; |
| 35 | private CellNucleus _systemNucleus = null ; |
| 36 | private ClassLoaderProvider _classLoader = null ; |
| 37 | private CellRoutingTable _routingTable = new CellRoutingTable() ; |
| 38 | private ThreadGroup _masterThreadGroup = null ; |
| 39 | private ThreadGroup _killerThreadGroup = null ; |
| 40 | |
| 41 | private final static Logger _logMessages = |
| 42 | LoggerFactory.getLogger("logger.org.dcache.cells.messages"); |
| 43 | private final static Logger _logGlue = |
| 44 | LoggerFactory.getLogger(CellGlue.class); |
| 45 | |
| 46 | CellGlue( String cellDomainName ){ |
| 47 | |
| 48 | String cellDomainNameLocal = cellDomainName ; |
| 49 | |
| 50 | if( ( cellDomainName == null ) || ( cellDomainName.equals("") ) ) |
| 51 | cellDomainNameLocal = "*" ; |
| 52 | |
| 53 | if( cellDomainNameLocal.charAt( cellDomainNameLocal.length() - 1 ) == '*' ){ |
| 54 | cellDomainNameLocal = |
| 55 | cellDomainNameLocal.substring(0,cellDomainNameLocal.length())+ |
| 56 | System.currentTimeMillis() ; |
| 57 | } |
| 58 | _cellDomainName = cellDomainNameLocal; |
| 59 | _classLoader = new ClassLoaderProvider() ; |
| 60 | _masterThreadGroup = new ThreadGroup( "Master-Thread-Group" ) ; |
| 61 | _killerThreadGroup = new ThreadGroup( "Killer-Thread-Group" ) ; |
| 62 | new CellUrl( this ) ; |
| 63 | } |
| 64 | ThreadGroup getMasterThreadGroup(){return _masterThreadGroup ; } |
| 65 | ThreadGroup getKillerThreadGroup(){return _killerThreadGroup ; } |
| 66 | |
| 67 | synchronized void addCell( String name , CellNucleus cell ) |
| 68 | throws IllegalArgumentException { |
| 69 | |
| 70 | if( _killedCellList.get( name ) != null ) |
| 71 | throw new IllegalArgumentException( "Name Mismatch ( cell " + name + " exist )" ) ; |
| 72 | if( _cellList.get( name ) != null ) |
| 73 | throw new IllegalArgumentException( "Name Mismatch ( cell " + name + " exist )" ) ; |
| 74 | |
| 75 | _cellList.put( name , cell ) ; |
| 76 | |
| 77 | sendToAll( new CellEvent( name , CellEvent.CELL_CREATED_EVENT ) ) ; |
| 78 | } |
| 79 | |
| 80 | void setSystemNucleus(CellNucleus nucleus) |
| 81 | { |
| 82 | _systemNucleus = nucleus; |
| 83 | } |
| 84 | |
| 85 | CellNucleus getSystemNucleus() |
| 86 | { |
| 87 | return _systemNucleus; |
| 88 | } |
| 89 | |
| 90 | String [] [] getClassProviders(){ return _classLoader.getProviders() ; } |
| 91 | |
| 92 | void setClassProvider( String selection , String provider ){ |
| 93 | String type = null ; |
| 94 | String value = null ; |
| 95 | int pos = provider.indexOf(':') ; |
| 96 | if( pos < 0 ){ |
| 97 | if( provider.indexOf('/') >= 0 ){ |
| 98 | type = "dir" ; |
| 99 | value = provider ; |
| 100 | }else if( provider.indexOf( '@' ) >= 0 ){ |
| 101 | type = "cells" ; |
| 102 | value = provider ; |
| 103 | }else if( provider.equals( "system" ) ){ |
| 104 | type = "system" ; |
| 105 | }else if( provider.equals( "none" ) ){ |
| 106 | type = "none" ; |
| 107 | }else |
| 108 | throw new |
| 109 | IllegalArgumentException( "Can't determine provider type" ) ; |
| 110 | }else{ |
| 111 | type = provider.substring( 0 , pos ) ; |
| 112 | value = provider.substring( pos+1 ) ; |
| 113 | } |
| 114 | if( type.equals( "dir" ) ){ |
| 115 | File file = new File( value ) ; |
| 116 | if( ! file.isDirectory() ) |
| 117 | throw new |
| 118 | IllegalArgumentException( "Not a directory : "+value ) ; |
| 119 | _classLoader.addFileProvider( selection , new File( value ) ) ; |
| 120 | }else if( type.equals( "cell" ) ){ |
| 121 | _classLoader.addCellProvider( selection , |
| 122 | _systemNucleus , |
| 123 | new CellPath( value ) ) ; |
| 124 | }else if( type.equals( "system" ) ){ |
| 125 | _classLoader.addSystemProvider( selection ); |
| 126 | }else if( type.equals( "none" ) ){ |
| 127 | _classLoader.removeSystemProvider( selection ); |
| 128 | }else |
| 129 | throw new |
| 130 | IllegalArgumentException( "Provider type not supported : "+type ) ; |
| 131 | |
| 132 | } |
| 133 | synchronized void export( CellNucleus cell ){ |
| 134 | |
| 135 | sendToAll( new CellEvent( cell.getCellName() , |
| 136 | CellEvent.CELL_EXPORTED_EVENT ) ) ; |
| 137 | } |
| 138 | private Class _loadClass( String className ) throws ClassNotFoundException { |
| 139 | return _classLoader.loadClass( className ) ; |
| 140 | } |
| 141 | public Class loadClass( String className ) throws ClassNotFoundException { |
| 142 | return _classLoader.loadClass( className ) ; |
| 143 | } |
| 144 | Object _newInstance( String className , |
| 145 | String cellName , |
| 146 | Object [] args , |
| 147 | boolean systemOnly ) |
| 148 | throws ClassNotFoundException , |
| 149 | NoSuchMethodException , |
| 150 | SecurityException , |
| 151 | InstantiationException , |
| 152 | InvocationTargetException , |
| 153 | IllegalAccessException , |
| 154 | ClassCastException { |
| 155 | |
| 156 | Class newClass = null ; |
| 157 | if( systemOnly ) |
| 158 | newClass = Class.forName( className ) ; |
| 159 | else |
| 160 | newClass = _loadClass( className ) ; |
| 161 | |
| 162 | Object [] arguments = new Object[args.length+1] ; |
| 163 | arguments[0] = cellName ; |
| 164 | for( int i = 0 ; i < args.length ; i++ ) |
| 165 | arguments[i+1] = args[i] ; |
| 166 | Class [] argClass = new Class[arguments.length] ; |
| 167 | for( int i = 0 ; i < arguments.length ; i++ ) |
| 168 | argClass[i] = arguments[i].getClass() ; |
| 169 | |
| 170 | return newClass.getConstructor( argClass ). |
| 171 | newInstance( arguments ) ; |
| 172 | |
| 173 | } |
| 174 | Object _newInstance( String className , |
| 175 | String cellName , |
| 176 | String [] argsClassNames , |
| 177 | Object [] args , |
| 178 | boolean systemOnly ) |
| 179 | throws ClassNotFoundException , |
| 180 | NoSuchMethodException , |
| 181 | SecurityException , |
| 182 | InstantiationException , |
| 183 | InvocationTargetException , |
| 184 | IllegalAccessException , |
| 185 | ClassCastException { |
| 186 | |
| 187 | Class newClass = null ; |
| 188 | if( systemOnly ) |
| 189 | newClass = Class.forName( className ) ; |
| 190 | else |
| 191 | newClass = _loadClass( className ) ; |
| 192 | |
| 193 | Object [] arguments = new Object[args.length+1] ; |
| 194 | arguments[0] = cellName ; |
| 195 | |
| 196 | for( int i = 0 ; i < args.length ; i++ ) |
| 197 | arguments[i+1] = args[i] ; |
| 198 | |
| 199 | Class [] argClasses = new Class[arguments.length] ; |
| 200 | |
| 201 | ClassLoader loader = newClass.getClassLoader() ; |
| 202 | argClasses[0] = java.lang.String.class ; |
| 203 | if( loader == null ){ |
| 204 | for( int i = 1 ; i < argClasses.length ; i++ ) |
| 205 | argClasses[i] = Class.forName( argsClassNames[i-1] ) ; |
| 206 | }else{ |
| 207 | for( int i = 1 ; i < argClasses.length ; i++ ) |
| 208 | argClasses[i] = loader.loadClass( argsClassNames[i-1] ) ; |
| 209 | } |
| 210 | |
| 211 | return newClass.getConstructor( argClasses ). |
| 212 | newInstance( arguments ) ; |
| 213 | |
| 214 | } |
| 215 | |
| 216 | Map<String, Object> getCellContext() |
| 217 | { |
| 218 | return _cellContext; |
| 219 | } |
| 220 | |
| 221 | Object getCellContext( String str ){ |
| 222 | return _cellContext.get( str ) ; |
| 223 | } |
| 224 | CellDomainInfo getCellDomainInfo(){ |
| 225 | CellDomainInfo info = new CellDomainInfo(_cellDomainName) ; |
| 226 | // info.setCellDomainName( _cellDomainName ) ; |
| 227 | return info ; |
| 228 | } |
| 229 | public void routeAdd( CellRoute route ){ |
| 230 | _routingTable.add( route ) ; |
| 231 | sendToAll( new CellEvent( route , CellEvent.CELL_ROUTE_ADDED_EVENT ) ) ; |
| 232 | } |
| 233 | public void routeDelete( CellRoute route ){ |
| 234 | _routingTable.delete( route ) ; |
| 235 | sendToAll( new CellEvent( route , CellEvent.CELL_ROUTE_DELETED_EVENT ) ) ; |
| 236 | } |
| 237 | CellRoutingTable getRoutingTable(){ return _routingTable ; } |
| 238 | CellRoute [] getRoutingList(){ return _routingTable.getRoutingList() ; } |
| 239 | synchronized CellTunnelInfo [] getCellTunnelInfos(){ |
| 240 | |
| 241 | List<CellTunnelInfo> v = new ArrayList<CellTunnelInfo>() ; |
| 242 | |
| 243 | for( CellNucleus cellNucleus : _cellList.values() ){ |
| 244 | |
| 245 | Cell c = cellNucleus.getThisCell() ; |
| 246 | |
| 247 | if( c instanceof CellTunnel ){ |
| 248 | v.add( ((CellTunnel)c).getCellTunnelInfo() ) ; |
| 249 | } |
| 250 | } |
| 251 | |
| 252 | return v.toArray( new CellTunnelInfo[v.size()] ) ; |
| 253 | |
| 254 | } |
| 255 | synchronized String [] getCellNames(){ |
| 256 | int size = _cellList.size() + _killedCellList.size() ; |
| 257 | |
| 258 | List<String> allCells = new ArrayList<String>(size); |
| 259 | |
| 260 | allCells.addAll(_cellList.keySet()); |
| 261 | allCells.addAll(_killedCellList.keySet()); |
| 262 | |
| 263 | return allCells.toArray(new String[size]); |
| 264 | |
| 265 | } |
| 266 | |
| 267 | int getUnique(){ return _uniqueCounter.incrementAndGet() ; } |
| 268 | |
| 269 | CellInfo getCellInfo( String name ){ |
| 270 | CellNucleus nucleus = _cellList.get( name ) ; |
| 271 | if( nucleus == null ){ |
| 272 | nucleus = _killedCellList.get( name ) ; |
| 273 | if( nucleus == null )return null ; |
| 274 | } |
| 275 | return nucleus._getCellInfo() ; |
| 276 | } |
| 277 | Thread [] getThreads( String name ){ |
| 278 | CellNucleus nucleus = _cellList.get( name ) ; |
| 279 | if( nucleus == null ){ |
| 280 | nucleus = _killedCellList.get( name ) ; |
| 281 | if( nucleus == null )return null ; |
| 282 | } |
| 283 | return nucleus.getThreads() ; |
| 284 | } |
| 285 | private void sendToAll( CellEvent event ){ |
| 286 | // |
| 287 | // inform our event listener |
| 288 | // |
| 289 | |
| 290 | for( List<CellEventListener> listners: _cellEventListener.values() ){ |
| 291 | |
| 292 | for( CellEventListener hallo : listners ){ |
| 293 | |
| 294 | if( hallo == null ){ |
| 295 | say( "event distributor found NULL" ) ; |
| 296 | continue ; |
| 297 | } |
| 298 | try{ |
| 299 | switch( event.getEventType() ){ |
| 300 | case CellEvent.CELL_CREATED_EVENT : |
| 301 | hallo.cellCreated( event ) ; |
| 302 | break ; |
| 303 | case CellEvent.CELL_EXPORTED_EVENT : |
| 304 | hallo.cellExported( event ) ; |
| 305 | break ; |
| 306 | case CellEvent.CELL_DIED_EVENT : |
| 307 | hallo.cellDied( event ) ; |
| 308 | break ; |
| 309 | case CellEvent.CELL_ROUTE_ADDED_EVENT : |
| 310 | hallo.routeAdded( event ) ; |
| 311 | break ; |
| 312 | case CellEvent.CELL_ROUTE_DELETED_EVENT : |
| 313 | hallo.routeDeleted( event ) ; |
| 314 | break ; |
| 315 | } |
| 316 | }catch( Exception anye ){ |
| 317 | say( "Exception while sending "+event + " ex : "+anye ) ; |
| 318 | } |
| 319 | } |
| 320 | |
| 321 | } |
| 322 | |
| 323 | } |
| 324 | |
| 325 | void setPrintoutLevel( int level ){ _printoutLevel = level ; } |
| 326 | int getPrintoutLevel(){ return _printoutLevel ; } |
| 327 | int getDefaultPrintoutLevel(){ return _defPrintoutLevel ; } |
| 328 | void setPrintoutLevel( String cellName , int level ){ |
| 329 | |
| 330 | if( cellName.equals("CellGlue") ){ |
| 331 | setPrintoutLevel(level) ; |
| 332 | return ; |
| 333 | }else if( cellName.equals("default") ){ |
| 334 | _defPrintoutLevel = level ; |
| 335 | return ; |
| 336 | } |
| 337 | |
| 338 | CellNucleus nucleus = _cellList.get( cellName ) ; |
| 339 | if( nucleus != null )nucleus.setPrintoutLevel( level ) ; |
| 340 | } |
| 341 | int getPrintoutLevel( String cellName ){ |
| 342 | |
| 343 | if( cellName.equals("CellGlue") )return getPrintoutLevel() ; |
| 344 | if( cellName.equals("default") )return getDefaultPrintoutLevel() ; |
| 345 | CellNucleus nucleus = _cellList.get( cellName ) ; |
| 346 | |
| 347 | if( nucleus != null )return nucleus.getPrintoutLevel() ; |
| 348 | |
| 349 | return -1 ; |
| 350 | } |
| 351 | |
| 352 | void say(String str){ |
| 353 | if( ( _printoutLevel & CellNucleus.PRINT_NUCLEUS ) != 0 ) { |
| 354 | _logGlue.warn(str); |
| 355 | } else { |
| 356 | _logGlue.info(str); |
| 357 | } |
| 358 | } |
| 359 | |
| 360 | void esay( String str ){ |
| 361 | if( ( _printoutLevel & CellNucleus.PRINT_NUCLEUS ) != 0 ) { |
| 362 | _logGlue.error(str); |
| 363 | } else { |
| 364 | _logGlue.info(str); |
| 365 | } |
| 366 | } |
| 367 | String getCellDomainName(){ return _cellDomainName ; } |
| 368 | void kill( CellNucleus nucleus ){ |
| 369 | _kill( nucleus , nucleus , 0 ) ; |
| 370 | } |
| 371 | void kill( CellNucleus sender , String cellName ) |
| 372 | throws IllegalArgumentException { |
| 373 | CellNucleus nucleus = _cellList.get( cellName ) ; |
| 374 | if( nucleus == null ) |
| 375 | throw new IllegalArgumentException( "Cell Not Found : "+cellName ) ; |
| 376 | _kill( sender , nucleus , 0 ) ; |
| 377 | |
| 378 | } |
| 379 | |
| 380 | /** |
| 381 | * Returns a named cell. This method also returns cells that have |
| 382 | * been killed, but which are not dead yet. |
| 383 | * |
| 384 | * @param cellName the name of the cell |
| 385 | * @return The cell with the given name or null if there is no such |
| 386 | * cell. |
| 387 | */ |
| 388 | CellNucleus getCell(String cellName) |
| 389 | { |
| 390 | CellNucleus nucleus = _cellList.get(cellName); |
| 391 | if (nucleus == null) { |
| 392 | nucleus = _killedCellList.get(cellName); |
| 393 | } |
| 394 | return nucleus; |
| 395 | } |
| 396 | |
| 397 | /** |
| 398 | * Blocks until the given cell is dead. |
| 399 | * |
| 400 | * @param cellName the name of the cell |
| 401 | * @param timeout the time to wait in milliseconds. A timeout |
| 402 | * of 0 means to wait forever. |
| 403 | * @throws InterruptedException if another thread interrupted the |
| 404 | * current thread before or while the current thread was |
| 405 | * waiting for a notification. The interrupted status of |
| 406 | * the current thread is cleared when this exception is |
| 407 | * thrown. |
| 408 | * @return True if the cell died, false in case of a timeout. |
| 409 | */ |
| 410 | synchronized boolean join(String cellName, long timeout) throws InterruptedException |
| 411 | { |
| 412 | if (timeout == 0) { |
| 413 | while (getCell(cellName) != null) { |
| 414 | wait(); |
| 415 | } |
| 416 | return true; |
| 417 | } else { |
| 418 | while (getCell(cellName) != null && timeout > 0) { |
| 419 | long time = System.currentTimeMillis(); |
| 420 | wait(timeout); |
| 421 | timeout = timeout - (System.currentTimeMillis() - time); |
| 422 | } |
| 423 | return (timeout > 0); |
| 424 | } |
| 425 | } |
| 426 | |
| 427 | synchronized void destroy( CellNucleus nucleus ){ |
| 428 | String name = nucleus.getCellName() ; |
| 429 | _killedCellList.remove( name ) ; |
| 430 | say( "destroy : sendToAll : killed"+name ) ; |
| 431 | notifyAll(); |
| 432 | // |
| 433 | // CELL_DIED_EVENT moved to _kill. Otherwise |
| 434 | // we have bouncing message because the WELL_KNOWN_ROUTE |
| 435 | // is still there but the entry in the ps list is not. |
| 436 | // |
| 437 | // sendToAll( new CellEvent( name , CellEvent.CELL_DIED_EVENT ) ) ; |
| 438 | return ; |
| 439 | } |
| 440 | private synchronized void _kill( CellNucleus source , |
| 441 | CellNucleus destination , |
| 442 | long to ) { |
| 443 | |
| 444 | _cellEventListener.remove( destination.getCellName() ) ; |
| 445 | |
| 446 | CellPath sourceAddr = new CellPath( source.getCellName() , |
| 447 | getCellDomainName() ) ; |
| 448 | |
| 449 | KillEvent killEvent = new KillEvent( sourceAddr , to ) ; |
| 450 | |
| 451 | String cellToKill = destination.getCellName() ; |
| 452 | |
| 453 | CellNucleus destNucleus = _cellList.remove( cellToKill ) ; |
| 454 | |
| 455 | sendToAll( new CellEvent( cellToKill , CellEvent.CELL_DIED_EVENT ) ) ; |
| 456 | |
| 457 | if( destNucleus == null ){ |
| 458 | esay( "Warning : (name not found in _kill) "+cellToKill ) ; |
| 459 | return ; |
| 460 | } |
| 461 | _killedCellList.put( destNucleus.getCellName() , destNucleus ) ; |
| 462 | destNucleus.sendKillEvent( killEvent ) ; |
| 463 | } |
| 464 | private static final int MAX_ROUTE_LEVELS = 16 ; |
| 465 | |
| 466 | void sendMessage( CellNucleus nucleus , CellMessage msg ) |
| 467 | throws SerializationException, |
| 468 | NoRouteToCellException { |
| 469 | |
| 470 | sendMessage( nucleus , msg , true , true ) ; |
| 471 | |
| 472 | } |
| 473 | void sendMessage( CellNucleus nucleus , |
| 474 | CellMessage msg , |
| 475 | boolean resolveLocally , |
| 476 | boolean resolveRemotely ) |
| 477 | throws SerializationException, |
| 478 | NoRouteToCellException { |
| 479 | |
| 480 | boolean firstSend = ! msg.isStreamMode() ; |
| 481 | |
| 482 | CellMessage transponder = msg ; |
| 483 | if( firstSend ){ |
| 484 | // |
| 485 | // this is the original send command |
| 486 | // - so we have to set the UOID ( sender needs it ) |
| 487 | // - we have to convert the message to stream. |
| 488 | // - and we have to set our address to find the way back |
| 489 | // |
| 490 | transponder = new CellMessage( msg ) ; |
| 491 | transponder.addSourceAddress( nucleus.getThisAddress() ) ; |
| 492 | } |
| 493 | |
| 494 | if( transponder.getSourcePath().hops() > 30 ){ |
| 495 | esay( "Hop count exceeds 30, dumping : "+transponder ) ; |
| 496 | return ; |
| 497 | } |
| 498 | CellPath destination = transponder.getDestinationPath() ; |
| 499 | CellAddressCore destCore = destination.getCurrent() ; |
| 500 | String cellName = destCore.getCellName() ; |
| 501 | String domainName = destCore.getCellDomainName(); |
| 502 | |
| 503 | say( "sendMessage : "+transponder.getUOID()+" send to "+destination); |
| 504 | if( _logMessages.isDebugEnabled() ) { |
| 505 | |
| 506 | CellMessage messageToSend; |
| 507 | |
| 508 | if( transponder.isStreamMode() ) { |
| 509 | messageToSend = new CellMessage(transponder); |
| 510 | }else{ |
| 511 | messageToSend = transponder; |
| 512 | } |
| 513 | |
| 514 | String messageObject = messageToSend.getMessageObject() == null? "NULL" : messageToSend.getMessageObject().getClass().getName(); |
| 515 | _logMessages.debug("glueSendMessage src=" + messageToSend.getSourceAddress() + |
| 516 | " dest=" + messageToSend.getDestinationAddress() + " [" + messageObject + "] UOID=" + messageToSend.getUOID().toString() ); |
| 517 | } |
| 518 | // |
| 519 | // if the cellname is an *, ( stream mode only ) we can skip |
| 520 | // this address, because it was needed to reach our domain, |
| 521 | // which hopefully happened. |
| 522 | // |
| 523 | if( ( ! firstSend ) && cellName.equals("*") ){ |
| 524 | say( "sendMessage : * detected ; skipping destination" ); |
| 525 | destination.next() ; |
| 526 | destCore = destination.getCurrent() ; |
| 527 | } |
| 528 | |
| 529 | |
| 530 | transponder.isRouted( false ) ; |
| 531 | // |
| 532 | // this is the big iteration loop |
| 533 | // |
| 534 | for( int iter = 0 ; iter < MAX_ROUTE_LEVELS ; iter ++ ){ |
| 535 | cellName = destCore.getCellName() ; |
| 536 | domainName = destCore.getCellDomainName() ; |
| 537 | say( "sendMessage : next hop at "+iter+" : "+cellName+"@"+domainName ) ; |
| 538 | |
| 539 | // |
| 540 | // now we try to find the destination cell in our domain |
| 541 | // |
| 542 | CellNucleus destNucleus = _cellList.get( cellName ) ; |
| 543 | if( domainName.equals( _cellDomainName ) ){ |
| 544 | if( cellName.equals("*") ){ |
| 545 | say( "sendMessagex : * detected ; skipping destination" ); |
| 546 | destination.next() ; |
| 547 | destCore = destination.getCurrent() ; |
| 548 | continue ; |
| 549 | } |
| 550 | // |
| 551 | // the domain name was specified ( other then 'local' ) |
| 552 | // and points to our domain. |
| 553 | // |
| 554 | if( destNucleus == null ){ |
| 555 | // say( "sendMessage : Not found : "+destination ) ; |
| 556 | if( firstSend ){ |
| 557 | throw new |
| 558 | NoRouteToCellException( |
| 559 | transponder.getUOID(), |
| 560 | destination, |
| 561 | "Initial Send"); |
| 562 | }else{ |
| 563 | sendException( nucleus , transponder , destination , cellName ) ; |
| 564 | return ; |
| 565 | } |
| 566 | } |
| 567 | if( iter == 0 ){ |
| 568 | // |
| 569 | // here we really found the destination cell ( no router ) |
| 570 | // |
| 571 | // say( "sendMessage : message "+transponder.getUOID()+ |
| 572 | // " addToEventQueue of "+cellName ) ; |
| 573 | destNucleus.addToEventQueue( new MessageEvent( transponder ) ) ; |
| 574 | }else{ |
| 575 | // |
| 576 | // this is a router, so we have to prepare the message for |
| 577 | // routing |
| 578 | // |
| 579 | // destNucleus.addToEventQueue( new RoutedMessageEvent( transponder ) ) ; |
| 580 | transponder.isRouted( true ) ; |
| 581 | transponder.addSourceAddress( |
| 582 | new CellAddressCore( "*" , _cellDomainName ) ) ; |
| 583 | // say( "sendMessage : message "+transponder.getUOID()+ |
| 584 | // " forwarded addToEventQueue of "+cellName ) ; |
| 585 | destNucleus.addToEventQueue( new RoutedMessageEvent( transponder ) ) ; |
| 586 | } |
| 587 | return ; |
| 588 | }else if( domainName.equals( "local" ) && |
| 589 | ( resolveLocally || ( iter != 0 ) ) ){ |
| 590 | // |
| 591 | // the domain name was 'local' AND |
| 592 | // ( we are assumed to deliver locally || |
| 593 | // we are already in the routing part ) |
| 594 | // |
| 595 | if( destNucleus != null ){ |
| 596 | // say( "sendMessage : locally delivered : "+destination ) ; |
| 597 | if( iter == 0 ){ |
| 598 | // say( "sendMessage : message "+transponder.getUOID()+ |
| 599 | // " addToEventQueue of "+cellName ) ; |
| 600 | destNucleus.addToEventQueue( new MessageEvent( transponder ) ) ; |
| 601 | }else{ |
| 602 | transponder.isRouted( true ) ; |
| 603 | transponder.addSourceAddress( |
| 604 | new CellAddressCore( "*" , _cellDomainName ) ) ; |
| 605 | // say( "sendMessage : message "+transponder.getUOID()+ |
| 606 | // " forwarded addToEventQueue of "+cellName ) ; |
| 607 | destNucleus.addToEventQueue( new RoutedMessageEvent( transponder ) ) ; |
| 608 | } |
| 609 | return ; |
| 610 | }else if( iter == MAX_ROUTE_LEVELS ){ |
| 611 | say( "sendMessage : max route iteration reached : "+destination ) ; |
| 612 | if( firstSend ){ |
| 613 | throw new |
| 614 | NoRouteToCellException( |
| 615 | transponder.getUOID(), |
| 616 | destination , |
| 617 | "Initial Send"); |
| 618 | }else{ |
| 619 | sendException( nucleus , transponder , destination , cellName ) ; |
| 620 | return ; |
| 621 | } |
| 622 | } |
| 623 | // |
| 624 | // destNuclues == null , is no problem in our case because |
| 625 | // 'wellknowncells' also use local as keyword. |
| 626 | // |
| 627 | }else if( domainName.equals( "local" ) && |
| 628 | ( ! resolveRemotely ) && |
| 629 | ( iter == 0 ) ){ |
| 630 | // |
| 631 | // the domain is specified AND |
| 632 | // we are assumed not to deliver remotely AND |
| 633 | // we are not yet in the routing part |
| 634 | // |
| 635 | throw new |
| 636 | NoRouteToCellException( |
| 637 | transponder.getUOID(), |
| 638 | destination, |
| 639 | " ! resolve remotely : "+destCore); |
| 640 | |
| 641 | } |
| 642 | // |
| 643 | // so, the destination cell wasn't found locally. |
| 644 | // let's consult the routes |
| 645 | // |
| 646 | CellRoute route = _routingTable.find( destCore ) ; |
| 647 | if( ( route == null ) || ( iter == MAX_ROUTE_LEVELS )){ |
| 648 | say( "sendMessage : no route destination for : "+destCore ) ; |
| 649 | if( firstSend ){ |
| 650 | throw new |
| 651 | NoRouteToCellException( |
| 652 | transponder.getUOID(), |
| 653 | destination, |
| 654 | "Missing routing entry for "+destCore); |
| 655 | }else{ |
| 656 | sendException( nucleus , transponder , destination , destCore.toString() ) ; |
| 657 | return ; |
| 658 | } |
| 659 | } |
| 660 | say( "sendMessage : using route : "+route ) ; |
| 661 | destCore = route.getTarget() ; |
| 662 | if( route.getRouteType() == CellRoute.ALIAS ) |
| 663 | destination.replaceCurrent( destCore ) ; |
| 664 | } |
| 665 | // end of big iteration loop |
| 666 | |
| 667 | } |
| 668 | private void sendException( CellNucleus nucleus , |
| 669 | CellMessage msg , |
| 670 | CellPath destination , |
| 671 | String routeTarget ) |
| 672 | throws SerializationException, |
| 673 | NoRouteToCellException { |
| 674 | // |
| 675 | // here we try to inform the last sender that we are |
| 676 | // not able to deliver the packet. |
| 677 | // |
| 678 | say( "sendMessage : Route target Not found : "+routeTarget ) ; |
| 679 | NoRouteToCellException exception = |
| 680 | new NoRouteToCellException( |
| 681 | msg.getUOID() , |
| 682 | destination , |
| 683 | "Tunnel cell >"+routeTarget+ |
| 684 | "< not found at >"+_cellDomainName+"<" ) ; |
| 685 | CellPath retAddr = (CellPath)msg.getSourcePath().clone() ; |
| 686 | retAddr.revert() ; |
| 687 | CellExceptionMessage ret = |
| 688 | new CellExceptionMessage( retAddr , exception ) ; |
| 689 | esay( "Sending CellException to "+retAddr ) ; |
| 690 | ret.setLastUOID( msg.getUOID() ) ; |
| 691 | sendMessage( nucleus , ret ) ; |
| 692 | |
| 693 | } |
| 694 | |
| 695 | void addCellEventListener(CellNucleus nucleus, CellEventListener listener) |
| 696 | { |
| 697 | List<CellEventListener> v; |
| 698 | if ((v = _cellEventListener.get(nucleus.getCellName())) == null) { |
| 699 | v = CollectionFactory.newCopyOnWriteArrayList(); |
| 700 | _cellEventListener.put(nucleus.getCellName(), v); |
| 701 | } |
| 702 | v.add(listener); |
| 703 | } |
| 704 | |
| 705 | @Override |
| 706 | public String toString(){ return _cellDomainName ; } |
| 707 | |
| 708 | } |