bundles/org.simantics.db.procore/src/fi/vtt/simantics/procore/internal/SessionImplSocket.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2018 Association for Decentralized Information Management
   3  * in Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package fi.vtt.simantics.procore.internal;
  13
  14 import java.io.File;
  15 import java.io.IOException;
  16 import java.io.InputStream;
  17 import java.nio.charset.Charset;
  18 import java.nio.file.FileVisitResult;
  19 import java.nio.file.Files;
  20 import java.nio.file.Path;
  21 import java.nio.file.SimpleFileVisitor;
  22 import java.nio.file.attribute.BasicFileAttributes;
  23 import java.util.ArrayList;
  24 import java.util.Collection;
  25 import java.util.HashSet;
  26 import java.util.TreeMap;
  27 import java.util.concurrent.CopyOnWriteArrayList;
  28 import java.util.concurrent.Semaphore;
  29 import java.util.concurrent.atomic.AtomicInteger;
  30 import java.util.function.Consumer;
  31
  32 import org.eclipse.core.runtime.Platform;
  33 import org.simantics.databoard.Bindings;
  34 import org.simantics.db.AsyncReadGraph;
  35 import org.simantics.db.ChangeSet;
  36 import org.simantics.db.DevelopmentKeys;
  37 import org.simantics.db.Disposable;
  38 import org.simantics.db.ExternalValueSupport;
  39 import org.simantics.db.Metadata;
  40 import org.simantics.db.MonitorContext;
  41 import org.simantics.db.MonitorHandler;
  42 import org.simantics.db.ReadGraph;
  43 import org.simantics.db.Resource;
  44 import org.simantics.db.ResourceSerializer;
  45 import org.simantics.db.Session;
  46 import org.simantics.db.SessionManager;
  47 import org.simantics.db.SessionVariables;
  48 import org.simantics.db.VirtualGraph;
  49 import org.simantics.db.WriteGraph;
  50 import org.simantics.db.authentication.UserAuthenticationAgent;
  51 import org.simantics.db.authentication.UserAuthenticator;
  52 import org.simantics.db.common.Indexing;
  53 import org.simantics.db.common.TransactionPolicyRelease;
  54 import org.simantics.db.common.procedure.adapter.AsyncMultiProcedureAdapter;
  55 import org.simantics.db.common.procedure.adapter.ProcedureAdapter;
  56 import org.simantics.db.common.procedure.adapter.SyncMultiProcedureAdapter;
  57 import org.simantics.db.common.procedure.wrapper.NoneToAsyncListener;
  58 import org.simantics.db.common.procedure.wrapper.NoneToAsyncMultiListener;
  59 import org.simantics.db.common.procedure.wrapper.NoneToAsyncMultiProcedure;
  60 import org.simantics.db.common.procedure.wrapper.NoneToAsyncProcedure;
  61 import org.simantics.db.common.procedure.wrapper.NoneToSyncMultiListener;
  62 import org.simantics.db.common.procedure.wrapper.NoneToSyncMultiProcedure;
  63 import org.simantics.db.common.procedure.wrapper.SyncToAsyncListener;
  64 import org.simantics.db.common.procedure.wrapper.SyncToAsyncMultiListener;
  65 import org.simantics.db.common.procedure.wrapper.SyncToAsyncMultiProcedure;
  66 import org.simantics.db.common.procedure.wrapper.SyncToAsyncProcedure;
  67 import org.simantics.db.common.service.ServiceActivityMonitorImpl;
  68 import org.simantics.db.common.service.ServiceActivityUpdaterForWriteTransactions;
  69 import org.simantics.db.common.utils.Logger;
  70 import org.simantics.db.event.ChangeEvent;
  71 import org.simantics.db.event.ChangeListener;
  72 import org.simantics.db.event.SessionEventListener;
  73 import org.simantics.db.exception.CancelTransactionException;
  74 import org.simantics.db.exception.ClusterSetExistException;
  75 import org.simantics.db.exception.DatabaseException;
  76 import org.simantics.db.exception.ImmutableException;
  77 import org.simantics.db.exception.InvalidResourceReferenceException;
  78 import org.simantics.db.exception.ResourceNotFoundException;
  79 import org.simantics.db.exception.RuntimeDatabaseException;
  80 import org.simantics.db.exception.ServiceException;
  81 import org.simantics.db.exception.ServiceNotFoundException;
  82 import org.simantics.db.impl.BlockingAsyncProcedure;
  83 import org.simantics.db.impl.ClusterBase;
  84 import org.simantics.db.impl.ClusterI;
  85 import org.simantics.db.impl.ClusterTraitsBase;
  86 import org.simantics.db.impl.ClusterTranslator;
  87 import org.simantics.db.impl.ResourceImpl;
  88 import org.simantics.db.impl.TransientGraph;
  89 import org.simantics.db.impl.VirtualGraphImpl;
  90 import org.simantics.db.impl.graph.DelayedWriteGraph;
  91 import org.simantics.db.impl.graph.ReadGraphImpl;
  92 import org.simantics.db.impl.graph.WriteGraphImpl;
  93 import org.simantics.db.impl.graph.WriteSupport;
  94 import org.simantics.db.impl.internal.RandomAccessValueSupport;
  95 import org.simantics.db.impl.procedure.ResultCallWrappedQueryProcedure4;
  96 import org.simantics.db.impl.procedure.ResultCallWrappedSyncQueryProcedure;
  97 import org.simantics.db.impl.query.QueryCache;
  98 import org.simantics.db.impl.query.QueryCacheBase;
  99 import org.simantics.db.impl.query.QueryProcessor;
 100 import org.simantics.db.impl.query.QueryProcessor.SessionRead;
 101 import org.simantics.db.impl.query.QueryProcessor.SessionTask;
 102 import org.simantics.db.impl.service.QueryDebug;
 103 import org.simantics.db.impl.support.VirtualGraphServerSupport;
 104 import org.simantics.db.impl.support.WriteRequestScheduleSupport;
 105 import org.simantics.db.procedure.AsyncListener;
 106 import org.simantics.db.procedure.AsyncMultiListener;
 107 import org.simantics.db.procedure.AsyncMultiProcedure;
 108 import org.simantics.db.procedure.AsyncProcedure;
 109 import org.simantics.db.procedure.Listener;
 110 import org.simantics.db.procedure.ListenerBase;
 111 import org.simantics.db.procedure.MultiListener;
 112 import org.simantics.db.procedure.MultiProcedure;
 113 import org.simantics.db.procedure.Procedure;
 114 import org.simantics.db.procedure.SyncListener;
 115 import org.simantics.db.procedure.SyncMultiListener;
 116 import org.simantics.db.procedure.SyncMultiProcedure;
 117 import org.simantics.db.procedure.SyncProcedure;
 118 import org.simantics.db.procore.cluster.ClusterImpl;
 119 import org.simantics.db.procore.cluster.ClusterTraits;
 120 import org.simantics.db.procore.protocol.Constants;
 121 import org.simantics.db.procore.protocol.DebugPolicy;
 122 import org.simantics.db.request.AsyncMultiRead;
 123 import org.simantics.db.request.AsyncRead;
 124 import org.simantics.db.request.DelayedWrite;
 125 import org.simantics.db.request.DelayedWriteResult;
 126 import org.simantics.db.request.ExternalRead;
 127 import org.simantics.db.request.MultiRead;
 128 import org.simantics.db.request.Read;
 129 import org.simantics.db.request.ReadInterface;
 130 import org.simantics.db.request.Write;
 131 import org.simantics.db.request.WriteInterface;
 132 import org.simantics.db.request.WriteOnly;
 133 import org.simantics.db.request.WriteOnlyResult;
 134 import org.simantics.db.request.WriteResult;
 135 import org.simantics.db.request.WriteTraits;
 136 import org.simantics.db.service.ByteReader;
 137 import org.simantics.db.service.ClusterBuilder;
 138 import org.simantics.db.service.ClusterBuilderFactory;
 139 import org.simantics.db.service.ClusterControl;
 140 import org.simantics.db.service.ClusterSetsSupport;
 141 import org.simantics.db.service.ClusterUID;
 142 import org.simantics.db.service.ClusteringSupport;
 143 import org.simantics.db.service.CollectionSupport;
 144 import org.simantics.db.service.DebugSupport;
 145 import org.simantics.db.service.DirectQuerySupport;
 146 import org.simantics.db.service.GraphChangeListenerSupport;
 147 import org.simantics.db.service.InitSupport;
 148 import org.simantics.db.service.LifecycleSupport;
 149 import org.simantics.db.service.ManagementSupport;
 150 import org.simantics.db.service.QueryControl;
 151 import org.simantics.db.service.SerialisationSupport;
 152 import org.simantics.db.service.ServerInformation;
 153 import org.simantics.db.service.ServiceActivityMonitor;
 154 import org.simantics.db.service.SessionEventSupport;
 155 import org.simantics.db.service.SessionMonitorSupport;
 156 import org.simantics.db.service.SessionUserSupport;
 157 import org.simantics.db.service.StatementSupport;
 158 import org.simantics.db.service.TransactionPolicySupport;
 159 import org.simantics.db.service.TransactionSupport;
 160 import org.simantics.db.service.TransferableGraphSupport;
 161 import org.simantics.db.service.UndoRedoSupport;
 162 import org.simantics.db.service.VirtualGraphSupport;
 163 import org.simantics.db.service.XSupport;
 164 import org.simantics.layer0.Layer0;
 165 import org.simantics.utils.DataContainer;
 166 import org.simantics.utils.Development;
 167 import org.simantics.utils.threads.logger.ITask;
 168 import org.simantics.utils.threads.logger.ThreadLogger;
 169
 170 import gnu.trove.procedure.TLongProcedure;
 171 import gnu.trove.set.hash.TLongHashSet;
 172
 173
 174 public abstract class SessionImplSocket implements Session, WriteRequestScheduleSupport {
 175
 176     protected static final boolean DEBUG        = false;
 177
 178     private static final boolean DIAGNOSTICS       = false;
 179
 180     private TransactionPolicySupport transactionPolicy;
 181
 182     final private ClusterControl clusterControl;
 183
 184     final protected BuiltinSupportImpl builtinSupport;
 185     final protected VirtualGraphServerSupportImpl virtualGraphServerSupport;
 186     final protected ClusterSetsSupport clusterSetsSupport;
 187     final protected LifecycleSupportImpl lifecycleSupport;
 188
 189     protected QuerySupportImpl querySupport;
 190     protected ResourceSupportImpl resourceSupport;
 191     protected WriteSupport writeSupport;
 192     public ClusterTranslator clusterTranslator;
 193
 194     boolean dirtyPrimitives = false;
 195
 196     public static final int SERVICE_MODE_CREATE = 2;
 197     public static final int SERVICE_MODE_ALLOW = 1;
 198     public int serviceMode = 0;
 199     public boolean createdImmutableClusters = false;
 200     public TLongHashSet createdClusters = new TLongHashSet();
 201
 202     private Layer0 L0;
 203
 204     /**
 205      * The service locator maintained by the workbench. These services are
 206      * initialized during workbench during the <code>init</code> method.
 207      */
 208     final protected ServiceLocatorImpl                           serviceLocator     = new ServiceLocatorImpl();
 209
 210     final public ResourceSerializerImpl                       resourceSerializer = new ResourceSerializerImpl();
 211
 212     final CopyOnWriteArrayList<ChangeListener>         changeListeners2   = new CopyOnWriteArrayList<ChangeListener>();
 213
 214     final CopyOnWriteArrayList<ChangeListener>         metadataListeners   = new CopyOnWriteArrayList<ChangeListener>();
 215
 216     final CopyOnWriteArrayList<SessionEventListener>   eventListeners     = new CopyOnWriteArrayList<SessionEventListener>();
 217
 218     final HashSet<Thread>                              sessionThreads     = new HashSet<Thread>();
 219
 220     final BijectionMap<MonitorContext, MonitorHandler> monitorContexts    = new BijectionMap<MonitorContext, MonitorHandler>();
 221
 222     final protected State                                        state              = new State();
 223
 224     protected GraphSession                                       graphSession       = null;
 225
 226     protected SessionManager                                     sessionManagerImpl = null;
 227
 228     protected UserAuthenticationAgent                            authAgent          = null;
 229
 230     protected UserAuthenticator                                  authenticator      = null;
 231
 232     protected Resource                                           user               = null;
 233
 234     protected ClusterStream                                      clusterStream      = null;
 235
 236     protected SessionRequestManager                         requestManager = null;
 237
 238     public ClusterTable                                       clusterTable       = null;
 239
 240     public QueryProcessor                                     queryProvider2 = null;
 241
 242     ClientChangesImpl                                  clientChanges      = null;
 243
 244     MonitorHandler[]                                   monitorHandlers    = new MonitorHandler[0];
 245
 246 //    protected long                                               newClusterId       = Constants.NullClusterId;
 247
 248     protected int                                                flushCounter       = 0;
 249
 250     protected boolean                                            writeOnly          = false;
 251
 252     WriteState<?>                                                writeState = null;
 253     WriteStateBase<?>                                            delayedWriteState = null;
 254     protected Resource defaultClusterSet = null; // If not null then used for newResource().
 255
 256     public SessionImplSocket(SessionManager sessionManagerImpl, UserAuthenticationAgent authAgent) {
 257
 258 //        if (authAgent == null)
 259 //            throw new IllegalArgumentException("null authentication agent");
 260
 261         File t = StaticSessionProperties.virtualGraphStoragePath;
 262         if (null == t)
 263             t = new File(".");
 264         this.clusterTable = new ClusterTable(this, t);
 265         this.builtinSupport = new BuiltinSupportImpl(this);
 266         this.sessionManagerImpl = sessionManagerImpl;
 267         this.user = null;
 268 //        this.authAgent = authAgent;
 269
 270         serviceLocator.registerService(Session.class, this);
 271         serviceLocator.registerService(InitSupport.class, new InitSupportImpl(this));
 272         serviceLocator.registerService(ManagementSupport.class, new ManagementSupportImpl(this));
 273         serviceLocator.registerService(QueryControl.class, new QueryControlImpl(this));
 274         serviceLocator.registerService(SessionUserSupport.class, new SessionUserSupportImpl(this));
 275         serviceLocator.registerService(GraphChangeListenerSupport.class, new GraphChangeListenerSupportImpl(this));
 276         serviceLocator.registerService(SessionEventSupport.class, new SessionEventSupportImpl(this));
 277         serviceLocator.registerService(SerialisationSupport.class, new SerialisationSupportImpl(this));
 278         serviceLocator.registerService(UndoRedoSupport.class, new UndoRedoSupportImpl(this));
 279         serviceLocator.registerService(ClusteringSupport.class, new ClusteringSupportImpl(this));
 280         serviceLocator.registerService(TransactionSupport.class, new TransactionSupportImpl(this));
 281         serviceLocator.registerService(SessionMonitorSupport.class, new SessionMonitorSupportImpl(this));
 282         serviceLocator.registerService(TransferableGraphSupport.class, new TransferableGraphSupportImpl(this));
 283         serviceLocator.registerService(QueryDebug.class, new QueryDebugImpl(this));
 284         serviceLocator.registerService(CollectionSupport.class, new CollectionSupportImpl(this));
 285         serviceLocator.registerService(StatementSupport.class, new StatementSupportImpl(this));
 286         serviceLocator.registerService(DirectQuerySupport.class, new DirectQuerySupportImpl(this));
 287         serviceLocator.registerService(XSupport.class, new XSupportImpl(this));
 288         serviceLocator.registerService(DebugSupport.class, new DebugSupportImpl());
 289         serviceLocator.registerService(ExternalValueSupport.class, new ExternalValueSupportImpl(this));
 290         serviceLocator.registerService(RandomAccessValueSupport.class, new RandomAccessValueSupportImpl());
 291         serviceLocator.registerService(ServiceActivityMonitor.class, new ServiceActivityMonitorImpl());
 292         ServiceActivityUpdaterForWriteTransactions.register(this);
 293
 294         this.virtualGraphServerSupport = new VirtualGraphServerSupportImpl(this, t);
 295         serviceLocator.registerService(VirtualGraphSupport.class, virtualGraphServerSupport);
 296         serviceLocator.registerService(VirtualGraphServerSupport.class, virtualGraphServerSupport);
 297         this.lifecycleSupport = new LifecycleSupportImpl(this);
 298         serviceLocator.registerService(LifecycleSupport.class, lifecycleSupport);
 299         this.transactionPolicy = new TransactionPolicyRelease();
 300         serviceLocator.registerService(TransactionPolicySupport.class, transactionPolicy);
 301         this.clusterControl = new ClusterControlImpl(this);
 302         serviceLocator.registerService(ClusterControl.class, clusterControl);
 303         this.clusterSetsSupport = new ClusterSetsSupportImpl2(); // Using same path as virtual graphs.
 304         this.clusterSetsSupport.setReadDirectory(t.toPath());
 305         this.clusterSetsSupport.updateWriteDirectory(t.toPath());
 306         serviceLocator.registerService(ClusterSetsSupport.class, clusterSetsSupport);
 307     }
 308
 309     /*
 310      *
 311      * Session interface
 312      */
 313
 314
 315     @Override
 316     public Resource getRootLibrary() {
 317         return queryProvider2.getRootLibraryResource();
 318     }
 319
 320     void refresh(int thread, ClusterUID[] clusterUID, long csid) throws DatabaseException {
 321         if (!graphSession.dbSession.refreshEnabled())
 322             return;
 323         try {
 324             getClusterTable().refresh(csid, this, clusterUID);
 325         } catch (Throwable t) {
 326             Logger.defaultLogError("Refesh failed.", t);
 327         }
 328     }
 329
 330     static final class TaskHelper {
 331         private final String name;
 332         private Object result;
 333         final Semaphore sema = new Semaphore(0);
 334         private Throwable throwable = null;
 335         final Consumer<DatabaseException> callback = e -> {
 336             synchronized (TaskHelper.this) {
 337                 throwable = e;
 338             }
 339         };
 340         final Procedure<Object> proc = new Procedure<Object>() {
 341             @Override
 342             public void execute(Object result) {
 343                 callback.accept(null);
 344             }
 345             @Override
 346             public void exception(Throwable t) {
 347                 if (t instanceof DatabaseException)
 348                     callback.accept((DatabaseException)t);
 349                 else
 350                     callback.accept(new DatabaseException("" + name + "operation failed.", t));
 351             }
 352         };
 353         final WriteTraits writeTraits = new WriteTraits() {};
 354         TaskHelper(String name) {
 355             this.name = name;
 356         }
 357         @SuppressWarnings("unchecked")
 358         <T> T getResult() {
 359             return (T)result;
 360         }
 361         void setResult(Object result) {
 362             this.result = result;
 363         }
 364 //        Throwable throwableGet() {
 365 //            return throwable;
 366 //        }
 367         synchronized void throwableSet(Throwable t) {
 368             throwable = t;
 369         }
 370 //        void throwableSet(String t) {
 371 //            throwable = new InternalException("" + name + " operation failed. " + t);
 372 //        }
 373         synchronized void throwableCheck()
 374         throws DatabaseException {
 375             if (null != throwable)
 376                 if (throwable instanceof DatabaseException)
 377                     throw (DatabaseException)throwable;
 378                 else
 379                     throw new DatabaseException("Undo operation failed.", throwable);
 380         }
 381         void throw_(String message)
 382         throws DatabaseException {
 383             throw new DatabaseException("" + name + " operation failed. " + message);
 384         }
 385     }
 386
 387
 388
 389     private ListenerBase getListenerBase(Object procedure) {
 390         if (procedure instanceof ListenerBase)
 391             return (ListenerBase) procedure;
 392         else
 393             return null;
 394     }
 395
 396     public <T> void scheduleRequest(final Write request, final Consumer<DatabaseException> callback, final Semaphore notify) {
 397         scheduleRequest(request, callback, notify, null);
 398     }
 399
 400     /* (non-Javadoc)
 401      * @see fi.vtt.simantics.procore.internal.WriteRequestScheduler#scheduleRequest(org.simantics.db.request.Write, org.simantics.utils.datastructures.Callback, java.util.concurrent.Semaphore, java.lang.Boolean)
 402      */
 403     @Override
 404     public <T> void scheduleRequest(final Write request, final Consumer<DatabaseException> callback, final Semaphore notify, Boolean combine) {
 405
 406         assert (request != null);
 407
 408         if(Development.DEVELOPMENT) {
 409             try {
 410             if(Development.<Boolean>getProperty(DevelopmentKeys.SESSION_LOG_WRITES, Bindings.BOOLEAN))
 411                 System.err.println("schedule write '" + request + "'");
 412             } catch (Throwable t) {
 413                 Logger.defaultLogError(t);
 414             }
 415         }
 416
 417         int thread = request.hashCode() & queryProvider2.THREAD_MASK;
 418
 419         requestManager.scheduleWrite(new SessionTask(true) {
 420
 421             @Override
 422             public void run(int thread) {
 423
 424                 if(Development.DEVELOPMENT) {
 425                     try {
 426                     if(Development.<Boolean>getProperty(DevelopmentKeys.SESSION_LOG_WRITES, Bindings.BOOLEAN))
 427                         System.err.println("perform write '" + request + "'");
 428                     } catch (Throwable t) {
 429                         Logger.defaultLogError(t);
 430                     }
 431                 }
 432
 433                 ITask task = ThreadLogger.getInstance().begin("WriteRequest " + request);
 434
 435                 fireSessionVariableChange(SessionVariables.QUEUED_WRITES);
 436
 437                 try {
 438
 439                     flushCounter = 0;
 440                     Disposable.safeDispose(clientChanges);
 441                     clientChanges = new ClientChangesImpl(SessionImplSocket.this);
 442
 443                     VirtualGraph vg = getProvider(request.getProvider());
 444
 445                     WriteGraphImpl writer = WriteGraphImpl.create(getQueryProvider2(), writeSupport, vg);
 446                     writeState = new WriteState<Object>(writer, request, notify, new Procedure<Object>() {
 447
 448                         @Override
 449                         public void execute(Object result) {
 450                             if(callback != null) callback.accept(null);
 451                         }
 452
 453                         @Override
 454                         public void exception(Throwable t) {
 455                             if(callback != null) callback.accept((DatabaseException)t);
 456                         }
 457
 458                     });
 459
 460                     assert (null != writer);
 461 //                    writer.state.barrier.inc();
 462
 463                     try {
 464                         request.perform(writer);
 465                         assert (null != writer);
 466                     } catch (Throwable t) {
 467                         if (!(t instanceof CancelTransactionException))
 468                             Logger.defaultLogError("Write transaction caused an unexpected error, see exception.", t);
 469                         writeState.except(t);
 470                     } finally {
 471 //                        writer.state.barrier.dec();
 472 //                        writer.waitAsync(request);
 473                     }
 474
 475
 476                     assert(!queryProvider2.cache.dirty);
 477
 478                 } catch (Throwable e) {
 479
 480                     // Log it first, just to be safe that the error is always logged.
 481                     if (!(e instanceof CancelTransactionException))
 482                     Logger.defaultLogError("Write transaction caused an unexpected error, see exception.", e);
 483
 484 //                    writeState.getGraph().state.barrier.dec();
 485 //                    writeState.getGraph().waitAsync(request);
 486
 487                     writeState.except(e);
 488
 489 //                    try {
 490 //                        // Callback is client code, we have to be prepared for it to throw unexpected exceptions.
 491 //                        // All we can do here is to log those, can't really pass them anywhere.
 492 //                        if (callback != null) {
 493 //                            if(e instanceof DatabaseException) callback.run((DatabaseException)e);
 494 //                            else callback.run(new DatabaseException(e));
 495 //                        }
 496 //                    } catch (Throwable e2) {
 497 //                        Logger.defaultLogError("Write request callback caused an unexpected error, see exception.", e2);
 498 //                    }
 499 //                    boolean empty = clusterStream.reallyFlush();
 500 //                    int callerThread = -1;
 501 //                    ClientChangesImpl cs = new ClientChangesImpl(SessionImplSocket.this);
 502 //                    SynchronizeContext context = new SynchronizeContext(callerThread, SessionImplSocket.this, cs, 1);
 503 //                    try {
 504 //                        // Send all local changes to server so it can calculate correct reverse change set.
 505 //                        // This will call clusterStream.accept().
 506 //                        state.cancelCommit(context, clusterStream);
 507 //                        if (!empty) {
 508 //                            if (!context.isOk()) // this is a blocking operation
 509 //                                throw new InternalException("Cancel failed. This should never happen. Contact application support.");
 510 //                            getQueryProvider2().performDirtyUpdates(writeState.getGraph());
 511 //                        }
 512 //                        state.cancelCommit2(context, clusterStream);
 513 //                    } catch (DatabaseException e3) {
 514 //                        Logger.defaultLogError("Write request cancel caused an unexpected error.", e3);
 515 //                    } finally {
 516 //                        clusterStream.setOff(false);
 517 //                        clientChanges = new ClientChangesImpl(SessionImplSocket.this);
 518 //                    }
 519
 520                 } finally {
 521
 522                     fireSessionVariableChange(SessionVariables.QUEUED_WRITES);
 523
 524                 }
 525
 526                 task.finish();
 527
 528                 if(Development.DEVELOPMENT) {
 529                     try {
 530                     if(Development.<Boolean>getProperty(DevelopmentKeys.SESSION_LOG_WRITES, Bindings.BOOLEAN))
 531                         System.err.println("finish write '" + request + "'");
 532                     } catch (Throwable t) {
 533                         Logger.defaultLogError(t);
 534                     }
 535                 }
 536
 537             }
 538
 539         }, combine);
 540
 541     }
 542
 543     public <T> void scheduleRequest(final WriteResult<T> request, final Procedure<T> procedure, final Semaphore notify) {
 544         scheduleRequest(request, procedure, notify, null);
 545     }
 546
 547     /* (non-Javadoc)
 548      * @see fi.vtt.simantics.procore.internal.WriteRequestScheduler#scheduleRequest(org.simantics.db.request.WriteResult, org.simantics.db.procedure.Procedure, java.util.concurrent.Semaphore, java.lang.Boolean)
 549      */
 550     @Override
 551     public <T> void scheduleRequest(final WriteResult<T> request, final Procedure<T> procedure, final Semaphore notify, Boolean combine) {
 552
 553         assert (request != null);
 554
 555         int thread = request.hashCode() & queryProvider2.THREAD_MASK;
 556
 557         requestManager.scheduleWrite(new SessionTask(true) {
 558
 559             @Override
 560             public void run(int thread) {
 561
 562                 ITask task = ThreadLogger.getInstance().begin("WriteRequest " + request);
 563
 564                 fireSessionVariableChange(SessionVariables.QUEUED_WRITES);
 565
 566                 flushCounter = 0;
 567                 Disposable.safeDispose(clientChanges);
 568                 clientChanges = new ClientChangesImpl(SessionImplSocket.this);
 569
 570                 VirtualGraph vg = getProvider(request.getProvider());
 571                 WriteGraphImpl writer = WriteGraphImpl.create(getQueryProvider2(), writeSupport, vg);
 572
 573                 try {
 574                     WriteState<T> writeStateT = new WriteState<T>(writer, request, notify, procedure);
 575                     writeState = writeStateT;
 576
 577                     assert (null != writer);
 578 //                    writer.state.barrier.inc();
 579                     writeStateT.setResult(request.perform(writer));
 580                     assert (null != writer);
 581
 582 //                    writer.state.barrier.dec();
 583 //                    writer.waitAsync(null);
 584
 585                 } catch (Throwable e) {
 586
 587 //                    writer.state.barrier.dec();
 588 //                    writer.waitAsync(null);
 589
 590                     writeState.except(e);
 591
 592 //                  state.stopWriteTransaction(clusterStream);
 593 //
 594 //              } catch (Throwable e) {
 595 //                  // Log it first, just to be safe that the error is always logged.
 596 //                  Logger.defaultLogError("Write transaction caused an unexpected error, see exception.", e);
 597 //
 598 //                  try {
 599 //                      // Callback is client code, we have to be prepared for it to throw unexpected exceptions.
 600 //                      // All we can do here is to log those, can't really pass them anywhere.
 601 //                      if (procedure != null) {
 602 //                          if(e instanceof DatabaseException) procedure.exception((DatabaseException)e);
 603 //                          else procedure.exception(new DatabaseException(e));
 604 //                      }
 605 //                  } catch (Throwable e2) {
 606 //                      Logger.defaultLogError("Write request callback caused an unexpected error, see exception.", e2);
 607 //                  }
 608 //
 609 //                  clientChanges = new ClientChangesImpl(SessionImplSocket.this);
 610 //
 611 //                  state.stopWriteTransaction(clusterStream);
 612
 613                 } finally {
 614                     fireSessionVariableChange(SessionVariables.QUEUED_WRITES);
 615                 }
 616
 617 //              if(notify != null) notify.release();
 618
 619                 task.finish();
 620
 621             }
 622
 623         }, combine);
 624
 625     }
 626
 627     public <T> void scheduleRequest(final DelayedWrite request, final Consumer<DatabaseException> callback, final Semaphore notify) {
 628         scheduleRequest(request, callback, notify, null);
 629     }
 630
 631     /* (non-Javadoc)
 632      * @see fi.vtt.simantics.procore.internal.WriteRequestScheduler#scheduleRequest(org.simantics.db.request.DelayedWrite, org.simantics.utils.datastructures.Callback, java.util.concurrent.Semaphore, java.lang.Boolean)
 633      */
 634     @Override
 635     public <T> void scheduleRequest(final DelayedWrite request, final Consumer<DatabaseException> callback, final Semaphore notify, Boolean combine) {
 636
 637         final ITask total = ThreadLogger.getInstance().begin("ScheduleDelayedWrite");
 638
 639         assert (request != null);
 640
 641         int thread = request.hashCode() & queryProvider2.THREAD_MASK;
 642
 643         requestManager.scheduleWrite(new SessionTask(true) {
 644
 645             @Override
 646             public void run(int thread) {
 647                 fireSessionVariableChange(SessionVariables.QUEUED_READS);
 648
 649                 Procedure<Object> stateProcedure = new Procedure<Object>() {
 650                     @Override
 651                     public void execute(Object result) {
 652                         if (callback != null)
 653                             callback.accept(null);
 654                     }
 655                     @Override
 656                     public void exception(Throwable t) {
 657                         if (callback != null) {
 658                             if (t instanceof DatabaseException) callback.accept((DatabaseException) t);
 659                             else callback.accept(new DatabaseException(t));
 660                         } else
 661                             Logger.defaultLogError("Unhandled exception", t);
 662                     }
 663                 };
 664
 665                 final ReadGraphImpl newGraph = ReadGraphImpl.create(getQueryProvider2());
 666                 delayedWriteState = new WriteStateBase<Object>(request, notify, stateProcedure);
 667                 DelayedWriteGraph dwg = null;
 668 //                newGraph.state.barrier.inc();
 669
 670                 try {
 671                     dwg = new DelayedWriteGraph(newGraph);
 672                     request.perform(dwg);
 673                 } catch (Throwable e) {
 674                     delayedWriteState.except(e);
 675                     total.finish();
 676                     dwg.close();
 677                     return;
 678                 } finally {
 679 //                    newGraph.state.barrier.dec();
 680 //                    newGraph.waitAsync(request);
 681                     fireSessionVariableChange(SessionVariables.QUEUED_READS);
 682                 }
 683
 684                 delayedWriteState = null;
 685
 686                 ITask task2 = ThreadLogger.getInstance().begin("DelayedWriteCommit");
 687                 fireSessionVariableChange(SessionVariables.QUEUED_WRITES);
 688
 689                 flushCounter = 0;
 690                 Disposable.safeDispose(clientChanges);
 691                 clientChanges = new ClientChangesImpl(SessionImplSocket.this);
 692
 693                 acquireWriteOnly();
 694
 695                 VirtualGraph vg = getProvider(request.getProvider());
 696                 WriteSupport writeSupport = vg != null ? new VirtualWriteOnlySupport() : new WriteOnlySupport();
 697
 698                 WriteGraphImpl writer = WriteGraphImpl.create(getQueryProvider2(), writeSupport, vg);
 699
 700                 writeState = new WriteState<Object>(writer, request, notify, stateProcedure);
 701
 702                 assert (null != writer);
 703 //                writer.state.barrier.inc();
 704
 705                 try {
 706                     // Cannot cancel
 707                     dwg.commit(writer, request);
 708
 709                         if(defaultClusterSet != null) {
 710                                 XSupport xs = getService(XSupport.class);
 711                                 defaultClusterSet = xs.convertDelayedResourceToResource(defaultClusterSet);
 712                                 ClusteringSupport cs = getService(ClusteringSupport.class);
 713                                 clusterSetsSupport.put(defaultClusterSet.getResourceId(), cs.getCluster(defaultClusterSet));
 714                         }
 715
 716                     // This makes clusters available from server
 717                     clusterStream.reallyFlush();
 718
 719                     releaseWriteOnly(writer);
 720                     handleUpdatesAndMetadata(writer);
 721
 722                 } catch (ServiceException e) {
 723 //                    writer.state.barrier.dec();
 724 //                    writer.waitAsync(null);
 725
 726                     // These shall be requested from server
 727                     clusterTable.removeWriteOnlyClusters();
 728                     // This makes clusters available from server
 729                     clusterStream.reallyFlush();
 730
 731                     releaseWriteOnly(writer);
 732                     writeState.except(e);
 733                 } finally {
 734                     // Debugging & Profiling
 735                     fireSessionVariableChange(SessionVariables.QUEUED_WRITES);
 736                     task2.finish();
 737                     total.finish();
 738                 }
 739             }
 740
 741         }, combine);
 742
 743     }
 744
 745     public <T> void scheduleRequest(final DelayedWriteResult<T> request, final Procedure<T> procedure, final Semaphore notify) {
 746         scheduleRequest(request, procedure, notify, null);
 747     }
 748
 749     /* (non-Javadoc)
 750      * @see fi.vtt.simantics.procore.internal.WriteRequestScheduler#scheduleRequest(org.simantics.db.request.DelayedWriteResult, org.simantics.db.procedure.Procedure, java.util.concurrent.Semaphore, java.lang.Boolean)
 751      */
 752     @Override
 753     public <T> void scheduleRequest(final DelayedWriteResult<T> request, final Procedure<T> procedure, final Semaphore notify, Boolean combine) {
 754         throw new Error("Not implemented");
 755     }
 756
 757     protected ClusterImpl getNewResourceCluster() throws DatabaseException {
 758         ClusterImpl cluster = clusterTable.getNewResourceCluster(clusterTranslator, graphSession, writeOnly);
 759         if((serviceMode & SERVICE_MODE_CREATE) > 0) {
 760             createdClusters.add(cluster.clusterId);
 761         }
 762         return cluster;
 763     }
 764
 765     class WriteOnlySupport implements WriteSupport {
 766
 767         ClusterStream stream;
 768         ClusterImpl currentCluster;
 769
 770         public WriteOnlySupport() {
 771             this.stream = clusterStream;
 772         }
 773
 774         @Override
 775         public void claim(VirtualGraph provider, Resource subject, Resource predicate, Resource object) throws ServiceException {
 776             claim(provider, ((ResourceImpl)subject).id, ((ResourceImpl)predicate).id, ((ResourceImpl)object).id );
 777         }
 778
 779         @Override
 780         public void claim(VirtualGraph provider, int s, int p, int o) throws ServiceException {
 781
 782             ClusterImpl cluster = clusterTable.getClusterByResourceKey(s);
 783
 784             if (cluster.getImmutable() && (serviceMode & SessionImplSocket.SERVICE_MODE_ALLOW) == 0)
 785                 if(s != queryProvider2.getRootLibrary())
 786                     throw new ImmutableException("Trying to modify immutable resource key=" + s);
 787
 788             try {
 789                 maintainCluster(cluster, cluster.addRelation(s, p, o, clusterTranslator));
 790             } catch (DatabaseException e) {
 791                 Logger.defaultLogError(e);
 792                 //throw e;
 793             }
 794
 795             clientChanges.invalidate(s);
 796
 797             if (cluster.isWriteOnly())
 798                 return;
 799             queryProvider2.updateStatements(s, p);
 800
 801         }
 802
 803         @Override
 804         public void claimValue(VirtualGraph provider, Resource resource, byte[] value) throws DatabaseException {
 805             claimValue(provider, ((ResourceImpl)resource).id, value, value.length);
 806         }
 807
 808         @Override
 809         public void claimValue(VirtualGraph provider, int rid, byte[] value, int length) {
 810
 811             ClusterImpl cluster = clusterTable.getClusterByResourceKey(rid);
 812             try {
 813                 maintainCluster(cluster, cluster.setValue(rid, value, length, clusterTranslator));
 814             } catch (DatabaseException e) {
 815                 Logger.defaultLogError(e);
 816             }
 817
 818             clientChanges.invalidate(rid);
 819
 820             if (cluster.isWriteOnly())
 821                 return;
 822             queryProvider2.updateValue(rid);
 823
 824         }
 825
 826         @Override
 827         public void claimValue(VirtualGraph provider, Resource resource, ByteReader reader, int amount) throws DatabaseException {
 828
 829             if(amount < 65536) {
 830                 claimValue(provider,resource, reader.readBytes(null, amount));
 831                 return;
 832             }
 833
 834             byte[] bytes = new byte[65536];
 835
 836             int rid = ((ResourceImpl)resource).id;
 837             ClusterImpl cluster = clusterTable.getClusterByResourceKey(rid);
 838             try {
 839                 int left = amount;
 840                 while(left > 0) {
 841                     int block = Math.min(left, 65536);
 842                     reader.readBytes(bytes, block);
 843                     maintainCluster(cluster, cluster.modiValueEx(rid, amount-left, block, bytes, 0, clusterTranslator));
 844                     left -= block;
 845                 }
 846             } catch (DatabaseException e) {
 847                 Logger.defaultLogError(e);
 848             }
 849
 850             clientChanges.invalidate(rid);
 851
 852             if (cluster.isWriteOnly())
 853                 return;
 854             queryProvider2.updateValue(rid);
 855
 856         }
 857
 858         private void maintainCluster(ClusterImpl before, ClusterI after_) {
 859             if(after_ != null && after_ != before) {
 860                 ClusterImpl after = (ClusterImpl)after_;
 861                 if(currentCluster == before) {
 862                     currentCluster = after;
 863                 }
 864                 clusterTable.replaceCluster(after);
 865             }
 866         }
 867
 868         public int createResourceKey(int foreignCounter) throws DatabaseException {
 869             if(currentCluster == null) {
 870                 currentCluster = getNewResourceCluster();
 871             }
 872             if(currentCluster.getNumberOfResources(clusterTranslator) == ClusterTable.CLUSTER_FILL_SIZE) {
 873                 ClusterWriteOnly newCluster = (ClusterWriteOnly)getNewResourceCluster();
 874                 newCluster.foreignLookup = new byte[foreignCounter];
 875                 currentCluster = newCluster;
 876                 if (DEBUG)
 877                     System.err.println("foreignLookup " + currentCluster + " " + foreignCounter);
 878             }
 879             return currentCluster.createResource(clusterTranslator);
 880         }
 881
 882         @Override
 883         public Resource createResource(VirtualGraph provider) throws DatabaseException {
 884             if(currentCluster == null) {
 885                 if (null != defaultClusterSet) {
 886                         ResourceImpl result = getNewResource(defaultClusterSet);
 887                     currentCluster = clusterTable.getClusterByResourceKey(result.id);
 888                     return result;
 889                 } else {
 890                     currentCluster = getNewResourceCluster();
 891                 }
 892             }
 893             if(currentCluster.getNumberOfResources(clusterTranslator) >= ClusterTable.CLUSTER_FILL_SIZE) {
 894                 if (null != defaultClusterSet) {
 895                         ResourceImpl result = getNewResource(defaultClusterSet);
 896                     currentCluster = clusterTable.getClusterByResourceKey(result.id);
 897                     return result;
 898                 } else {
 899                     currentCluster = getNewResourceCluster();
 900                 }
 901             }
 902             return new ResourceImpl(resourceSupport, currentCluster.createResource(clusterTranslator));
 903         }
 904
 905         @Override
 906         public Resource createResource(VirtualGraph provider, long clusterId)
 907         throws DatabaseException {
 908             return getNewResource(clusterId);
 909         }
 910
 911         @Override
 912         public Resource createResource(VirtualGraph provider, Resource clusterSet)
 913         throws DatabaseException {
 914             return getNewResource(clusterSet);
 915         }
 916
 917         @Override
 918         public void createClusterSet(VirtualGraph provider, Resource clusterSet)
 919                 throws DatabaseException {
 920             getNewClusterSet(clusterSet);
 921         }
 922
 923         @Override
 924         public boolean hasClusterSet(VirtualGraph dummy, Resource clusterSet)
 925         throws ServiceException {
 926             return containsClusterSet(clusterSet);
 927         }
 928
 929         public void selectCluster(long cluster) {
 930                 currentCluster = clusterTable.getClusterByClusterId(cluster);
 931                 long setResourceId = clusterSetsSupport.getSet(cluster);
 932                 clusterSetsSupport.put(setResourceId, cluster);
 933         }
 934
 935         @Override
 936         public Resource setDefaultClusterSet(Resource clusterSet)
 937         throws ServiceException {
 938                 Resource result = setDefaultClusterSet4NewResource(clusterSet);
 939                 if(clusterSet != null) {
 940                         long id = clusterSetsSupport.get(clusterSet.getResourceId());
 941                         currentCluster = clusterTable.getClusterByClusterId(id);
 942                         return result;
 943                 } else {
 944                         currentCluster = null;
 945                         return null;
 946                 }
 947         }
 948
 949         @Override
 950         public void denyValue(VirtualGraph provider, Resource resource) throws ServiceException {
 951
 952                  provider = getProvider(provider);
 953              if (null == provider) {
 954                  int key = ((ResourceImpl)resource).id;
 955
 956
 957
 958                  ClusterI cluster = clusterTable.getClusterProxyByResourceKey(key);
 959 //                 if (cluster.getImmutable() && (serviceMode & SessionImplSocket.SERVICE_MODE_ALLOW) == 0)
 960 //                      if(key != queryProvider2.getRootLibrary())
 961 //                              throw new ImmutableException("Trying to modify immutable resource key=" + key);
 962
 963 //                 try {
 964 //                     cluster.removeValue(key, clusterTranslator);
 965 //                 } catch (DatabaseException e) {
 966 //                     Logger.defaultLogError(e);
 967 //                     return;
 968 //                 }
 969
 970                  clusterTable.writeOnlyInvalidate(cluster);
 971
 972                  try {
 973                          int sResourceKey = ClusterTraits.getResourceIndexFromResourceKey(key);
 974                          clusterTranslator.addStatementIndex(cluster, sResourceKey, cluster.getClusterUID(), ClusterChange.DELETE_OPERATION);
 975                          clusterTranslator.removeValue(cluster);
 976                  } catch (DatabaseException e) {
 977                          Logger.defaultLogError(e);
 978                  }
 979
 980                  queryProvider2.invalidateResource(key);
 981                  clientChanges.invalidate(key);
 982
 983              } else {
 984                  ((VirtualGraphImpl)provider).denyValue(((ResourceImpl) resource).id);
 985                  queryProvider2.updateValue(querySupport.getId(resource));
 986                  clientChanges.claimValue(resource);
 987              }
 988
 989
 990         }
 991
 992         @Override
 993         public void flush(boolean intermediate) {
 994             throw new UnsupportedOperationException();
 995         }
 996
 997         @Override
 998         public void flushCluster() {
 999             clusterTable.flushCluster(graphSession);
1000             if(defaultClusterSet != null) {
1001                 clusterSetsSupport.put(defaultClusterSet.getResourceId(), Constants.NewClusterId);
1002             }
1003             currentCluster = null;
1004         }
1005
1006         @Override
1007         public void flushCluster(Resource r) {
1008             throw new UnsupportedOperationException("flushCluster resource " + r);
1009         }
1010
1011         @Override
1012         public void gc() {
1013         }
1014
1015         @Override
1016         public boolean removeStatement(VirtualGraph provider, Resource subject, Resource predicate,
1017                 Resource object) {
1018
1019                 int s = ((ResourceImpl)subject).id;
1020                 int p = ((ResourceImpl)predicate).id;
1021                 int o = ((ResourceImpl)object).id;
1022
1023                 provider = getProvider(provider);
1024                 if (null == provider) {
1025
1026                         ClusterI cluster = clusterTable.getClusterProxyByResourceKey(s);
1027                         clusterTable.writeOnlyInvalidate(cluster);
1028
1029                         try {
1030
1031                                 int sResourceKey = ClusterTraits.getResourceIndexFromResourceKey(s);
1032
1033                                 ClusterI pc = clusterTable.getClusterProxyByResourceKey(p);
1034                                 ClusterI oc = clusterTable.getClusterProxyByResourceKey(o);
1035
1036                                 clusterTranslator.addStatementIndex(cluster, sResourceKey, cluster.getClusterUID(), ClusterChange.REMOVE_OPERATION);
1037                                 clusterTranslator.addStatementIndex(cluster, p, pc.getClusterUID(), ClusterStream.NULL_OPERATION);
1038                                 clusterTranslator.addStatementIndex(cluster, o, oc.getClusterUID(), ClusterStream.NULL_OPERATION);
1039                                 clusterTranslator.removeStatement(cluster);
1040
1041                                 queryProvider2.invalidateResource(s);
1042                                 clientChanges.invalidate(s);
1043
1044                         } catch (DatabaseException e) {
1045
1046                                 Logger.defaultLogError(e);
1047
1048                         }
1049
1050                         return true;
1051
1052                 } else {
1053
1054                         ((VirtualGraphImpl)provider).deny(s, p, o);
1055                         queryProvider2.invalidateResource(s);
1056                         clientChanges.invalidate(s);
1057
1058                         return true;
1059
1060                 }
1061
1062         }
1063
1064         @Override
1065         public void setValue(VirtualGraph provider, Resource resource, byte[] value) {
1066             throw new UnsupportedOperationException();
1067         }
1068
1069         @Override
1070         public boolean writeOnly() {
1071             return true;
1072         }
1073
1074         @Override
1075         public void performWriteRequest(WriteGraph graph, Write request) throws DatabaseException {
1076             writeSupport.performWriteRequest(graph, request);
1077         }
1078
1079         @Override
1080         public <T> T performWriteRequest(WriteGraph graph, WriteResult<T> request) throws DatabaseException {
1081             throw new UnsupportedOperationException();
1082         }
1083
1084         @Override
1085         public void performWriteRequest(WriteGraph graph, WriteOnly request) throws DatabaseException {
1086             throw new UnsupportedOperationException();
1087         }
1088
1089         @Override
1090         public <T> void addMetadata(Metadata data) throws ServiceException {
1091             writeSupport.addMetadata(data);
1092         }
1093
1094         @Override
1095         public <T extends Metadata> T getMetadata(Class<T> clazz) throws ServiceException {
1096             return writeSupport.getMetadata(clazz);
1097         }
1098
1099         @Override
1100         public TreeMap<String, byte[]> getMetadata() {
1101             return writeSupport.getMetadata();
1102         }
1103
1104         @Override
1105         public void commitDone(WriteTraits writeTraits, long csid) {
1106             writeSupport.commitDone(writeTraits, csid);
1107         }
1108
1109         @Override
1110         public void clearUndoList(WriteTraits writeTraits) {
1111             writeSupport.clearUndoList(writeTraits);
1112         }
1113         @Override
1114         public int clearMetadata() {
1115             return writeSupport.clearMetadata();
1116         }
1117
1118                 @Override
1119                 public void startUndo() {
1120                         writeSupport.startUndo();
1121                 }
1122     }
1123
1124     class VirtualWriteOnlySupport implements WriteSupport {
1125
1126 //        @Override
1127 //        public void addStatement(VirtualGraph provider, Resource subject, Resource predicate,
1128 //                Resource object) {
1129 //            throw new UnsupportedOperationException();
1130 //        }
1131
1132         @Override
1133         public void claim(VirtualGraph provider, Resource subject, Resource predicate, Resource object) {
1134
1135             TransientGraph impl = (TransientGraph)provider;
1136             impl.claim(querySupport.getId(subject), querySupport.getId(predicate), querySupport.getId(object));
1137             getQueryProvider2().updateStatements(querySupport.getId(subject), querySupport.getId(predicate));
1138             clientChanges.claim(subject, predicate, object);
1139
1140         }
1141
1142         @Override
1143         public void claim(VirtualGraph provider, int subject, int predicate, int object) {
1144
1145             TransientGraph impl = (TransientGraph)provider;
1146             impl.claim(subject, predicate, object);
1147             getQueryProvider2().updateStatements(subject, predicate);
1148             clientChanges.claim(subject, predicate, object);
1149
1150         }
1151
1152         @Override
1153         public void claimValue(VirtualGraph provider, Resource resource, byte[] value) throws DatabaseException {
1154             claimValue(provider, ((ResourceImpl)resource).id, value, value.length);
1155         }
1156
1157         @Override
1158         public void claimValue(VirtualGraph provider, int resource, byte[] value, int length) {
1159             ((VirtualGraphImpl)provider).claimValue(resource, value, length);
1160             getQueryProvider2().updateValue(resource);
1161             clientChanges.claimValue(resource);
1162         }
1163
1164         @Override
1165         public void claimValue(VirtualGraph provider, Resource resource, ByteReader reader, int amount) throws DatabaseException {
1166             byte[] value = reader.readBytes(null, amount);
1167             claimValue(provider, resource, value);
1168         }
1169
1170         @Override
1171         public Resource createResource(VirtualGraph provider) {
1172             TransientGraph impl = (TransientGraph)provider;
1173             return impl.getResource(impl.newResource(false));
1174         }
1175
1176         @Override
1177         public Resource createResource(VirtualGraph provider, long clusterId) {
1178             throw new UnsupportedOperationException();
1179         }
1180
1181         @Override
1182         public Resource createResource(VirtualGraph provider, Resource clusterSet)
1183         throws DatabaseException {
1184             throw new UnsupportedOperationException();
1185         }
1186
1187         @Override
1188         public void createClusterSet(VirtualGraph provider, Resource clusterSet)
1189         throws DatabaseException {
1190             throw new UnsupportedOperationException();
1191         }
1192
1193         @Override
1194         public boolean hasClusterSet(VirtualGraph provider, Resource clusterSet)
1195         throws ServiceException {
1196             throw new UnsupportedOperationException();
1197         }
1198
1199         @Override
1200         public Resource setDefaultClusterSet(Resource clusterSet)
1201         throws ServiceException {
1202                 return null;
1203         }
1204
1205         @Override
1206         public void denyValue(VirtualGraph provider, Resource resource) {
1207             ((VirtualGraphImpl)provider).denyValue(((ResourceImpl) resource).id);
1208             getQueryProvider2().updateValue(querySupport.getId(resource));
1209             // NOTE: this only keeps track of value changes by-resource.
1210             clientChanges.claimValue(resource);
1211         }
1212
1213         @Override
1214         public void flush(boolean intermediate) {
1215             throw new UnsupportedOperationException();
1216         }
1217
1218         @Override
1219         public void flushCluster() {
1220             throw new UnsupportedOperationException();
1221         }
1222
1223         @Override
1224         public void flushCluster(Resource r) {
1225             throw new UnsupportedOperationException("Resource " + r);
1226         }
1227
1228         @Override
1229         public void gc() {
1230         }
1231
1232         @Override
1233         public boolean removeStatement(VirtualGraph provider, Resource subject, Resource predicate, Resource object) {
1234             TransientGraph impl = (TransientGraph) provider;
1235             impl.deny(querySupport.getId(subject), querySupport.getId(predicate), querySupport.getId(object));
1236             getQueryProvider2().updateStatements(querySupport.getId(subject), querySupport.getId(predicate));
1237             clientChanges.deny(subject, predicate, object);
1238             return true;
1239         }
1240
1241         @Override
1242         public void setValue(VirtualGraph provider, Resource resource, byte[] value) {
1243             throw new UnsupportedOperationException();
1244         }
1245
1246         @Override
1247         public boolean writeOnly() {
1248             return true;
1249         }
1250
1251         @Override
1252         public void performWriteRequest(WriteGraph graph, Write request) throws DatabaseException {
1253             throw new UnsupportedOperationException();
1254         }
1255
1256         @Override
1257         public <T> T performWriteRequest(WriteGraph graph, WriteResult<T> request) throws DatabaseException {
1258             throw new UnsupportedOperationException();
1259         }
1260
1261         @Override
1262         public void performWriteRequest(WriteGraph graph, WriteOnly request) throws DatabaseException {
1263             throw new UnsupportedOperationException();
1264         }
1265
1266         @Override
1267         public <T> void addMetadata(Metadata data) throws ServiceException {
1268             throw new UnsupportedOperationException();
1269         }
1270
1271         @Override
1272         public <T extends Metadata> T getMetadata(Class<T> clazz) throws ServiceException {
1273             throw new UnsupportedOperationException();
1274         }
1275
1276         @Override
1277         public TreeMap<String, byte[]> getMetadata() {
1278             throw new UnsupportedOperationException();
1279         }
1280
1281         @Override
1282         public void commitDone(WriteTraits writeTraits, long csid) {
1283         }
1284
1285         @Override
1286         public void clearUndoList(WriteTraits writeTraits) {
1287         }
1288
1289         @Override
1290         public int clearMetadata() {
1291             return 0;
1292         }
1293
1294                 @Override
1295                 public void startUndo() {
1296                 }
1297     }
1298
1299     private <T> void performWriteOnly(WriteOnlyResult<T> request, Semaphore notify, Procedure<T> callback) {
1300
1301         try {
1302
1303             //int thread = request.hashCode() & queryProvider2.THREAD_MASK;
1304
1305             fireSessionVariableChange(SessionVariables.QUEUED_WRITES);
1306
1307             flushCounter = 0;
1308             Disposable.safeDispose(clientChanges);
1309             clientChanges = new ClientChangesImpl(SessionImplSocket.this);
1310
1311             acquireWriteOnly();
1312
1313             WriteSupport writeSupport = request.getProvider() != null ? new VirtualWriteOnlySupport() : new WriteOnlySupport();
1314
1315             WriteGraphImpl writer = WriteGraphImpl.create(getQueryProvider2(), writeSupport, request.getProvider());
1316
1317             WriteState<T> writeStateT = new WriteState<T>(writer, request, notify, callback);
1318             writeState = writeStateT;
1319
1320             assert (null != writer);
1321 //            writer.state.barrier.inc();
1322             long start = System.nanoTime();
1323             T result = request.perform(writer);
1324             long duration = System.nanoTime() - start;
1325             if (DEBUG) {
1326                 System.err.println("################");
1327                 System.err.println("WriteOnly duration " + 1e-9*duration);
1328             }
1329             writeStateT.setResult(result);
1330
1331             // This makes clusters available from server
1332             clusterStream.reallyFlush();
1333
1334             // This will trigger query updates
1335             releaseWriteOnly(writer);
1336             assert (null != writer);
1337
1338             handleUpdatesAndMetadata(writer);
1339
1340         } catch (CancelTransactionException e) {
1341
1342             releaseWriteOnly(writeState.getGraph());
1343
1344             clusterTable.removeWriteOnlyClusters();
1345             state.stopWriteTransaction(clusterStream);
1346
1347         } catch (Throwable e) {
1348
1349             e.printStackTrace();
1350
1351             releaseWriteOnly(writeState.getGraph());
1352
1353             clusterTable.removeWriteOnlyClusters();
1354
1355             if (callback != null)
1356                 callback.exception(new DatabaseException(e));
1357
1358             state.stopWriteTransaction(clusterStream);
1359             Logger.defaultLogError("Write transaction caused an unexpected error, see exception.", e);
1360
1361         } finally  {
1362
1363             fireSessionVariableChange(SessionVariables.QUEUED_WRITES);
1364
1365         }
1366
1367     }
1368
1369     public <T> void scheduleRequest(final WriteOnly request, final Consumer<DatabaseException> callback, final Semaphore notify) {
1370         scheduleRequest(request, callback, notify, null);
1371     }
1372
1373     @Override
1374     public <T> void scheduleRequest(final WriteOnly request, final Consumer<DatabaseException> callback, final Semaphore notify, Boolean combine) {
1375
1376         assertAlive();
1377
1378         assert (request != null);
1379
1380         int thread = request.hashCode() & queryProvider2.THREAD_MASK;
1381
1382         requestManager.scheduleWrite(new SessionTask(true) {
1383
1384             @Override
1385             public void run(int thread) {
1386
1387                 ITask task = ThreadLogger.getInstance().begin("WriteRequest " + request);
1388
1389                     try {
1390
1391                         fireSessionVariableChange(SessionVariables.QUEUED_WRITES);
1392
1393                         flushCounter = 0;
1394                         Disposable.safeDispose(clientChanges);
1395                         clientChanges = new ClientChangesImpl(SessionImplSocket.this);
1396
1397                         acquireWriteOnly();
1398
1399                         VirtualGraph vg = getProvider(request.getProvider());
1400                         WriteSupport writeSupport = vg != null ? new VirtualWriteOnlySupport() : new WriteOnlySupport();
1401
1402                         WriteGraphImpl writer = WriteGraphImpl.create(getQueryProvider2(), writeSupport, vg);
1403
1404                         writeState = new WriteState<Object>(writer, request, notify, new Procedure<Object>() {
1405
1406                             @Override
1407                             public void execute(Object result) {
1408                                 if(callback != null) callback.accept(null);
1409                             }
1410
1411                             @Override
1412                             public void exception(Throwable t) {
1413                                 if(callback != null) callback.accept((DatabaseException)t);
1414                             }
1415
1416                         });
1417
1418                         assert (null != writer);
1419 //                        writer.state.barrier.inc();
1420
1421                         try {
1422
1423                             request.perform(writer);
1424
1425                         } catch (Throwable e) {
1426
1427 //                            writer.state.barrier.dec();
1428 //                            writer.waitAsync(null);
1429
1430                             releaseWriteOnly(writer);
1431
1432                             clusterTable.removeWriteOnlyClusters();
1433
1434                             if(!(e instanceof CancelTransactionException)) {
1435                                 if (callback != null)
1436                                     callback.accept(new DatabaseException(e));
1437                             }
1438
1439                             writeState.except(e);
1440
1441                             return;
1442
1443                         }
1444
1445                         // This makes clusters available from server
1446                         boolean empty = clusterStream.reallyFlush();
1447                         // This was needed to make WO requests call metadata listeners.
1448                         // NOTE: the calling event does not contain clientChanges information.
1449                         if (!empty && clientChanges.isEmpty())
1450                             clientChanges.setNotEmpty(true);
1451                         releaseWriteOnly(writer);
1452                         assert (null != writer);
1453                     } finally  {
1454
1455                         fireSessionVariableChange(SessionVariables.QUEUED_WRITES);
1456
1457                     }
1458
1459
1460                 task.finish();
1461
1462             }
1463
1464         }, combine);
1465
1466     }
1467
1468     public <T> void scheduleRequest(final WriteOnlyResult<T> request, final Procedure<T> callback, final Semaphore notify) {
1469         scheduleRequest(request, callback, notify, null);
1470     }
1471
1472     /* (non-Javadoc)
1473      * @see org.simantics.db.impl.support.WriteRequestScheduleSupport#scheduleRequest(org.simantics.db.request.WriteOnlyResult, org.simantics.db.procedure.Procedure, java.util.concurrent.Semaphore, java.lang.Boolean)
1474      */
1475     @Override
1476     public <T> void scheduleRequest(final WriteOnlyResult<T> request, final Procedure<T> callback, final Semaphore notify, Boolean combine) {
1477
1478         assert (request != null);
1479
1480         int thread = request.hashCode() & queryProvider2.THREAD_MASK;
1481
1482         requestManager.scheduleWrite(new SessionTask(true) {
1483
1484             @Override
1485             public void run(int thread) {
1486
1487                 ITask task = ThreadLogger.getInstance().begin("WriteRequest " + request);
1488
1489                 performWriteOnly(request, notify, callback);
1490
1491                 task.finish();
1492
1493             }
1494
1495         }, combine);
1496
1497     }
1498
1499     public <T> void scheduleRequest(final Read<T> request, final AsyncProcedure<T> procedure, final Semaphore notify, final DataContainer<Throwable> throwable, final DataContainer<T> result) {
1500
1501         assert (request != null);
1502         assert (procedure != null);
1503
1504         //int thread = request.hashCode() & queryProvider2.THREAD_MASK;
1505
1506         requestManager.scheduleRead(new SessionRead(throwable, notify) {
1507
1508             @Override
1509             public void run(int thread) {
1510
1511                 fireSessionVariableChange(SessionVariables.QUEUED_READS);
1512
1513                 ListenerBase listener = getListenerBase(procedure);
1514
1515                 final ReadGraphImpl newGraph = ReadGraphImpl.create(getQueryProvider2());
1516
1517                 try {
1518
1519                     if (listener != null) {
1520
1521                         try {
1522
1523                                 AsyncProcedure ap = new AsyncProcedure<T>() {
1524
1525                                         @Override
1526                                         public void exception(AsyncReadGraph graph, Throwable t) {
1527                                                 procedure.exception(graph, t);
1528                                                 if(throwable != null) {
1529                                                         throwable.set(t);
1530                                                 } else {
1531                                                         //                                    ErrorLogger.defaultLogError("Unhandled exception", t);
1532                                                 }
1533                                         }
1534
1535                                         @Override
1536                                         public void execute(AsyncReadGraph graph, T t) {
1537                                                 if(result != null) result.set(t);
1538                                                 procedure.execute(graph, t);
1539                                         }
1540
1541                                 };
1542
1543                                 QueryCache.runnerReadEntry(newGraph, request, null, listener, ap, true);
1544
1545                         } catch (Throwable t) {
1546                             // This is handled by the AsyncProcedure
1547                                 //Logger.defaultLogError("Internal error", t);
1548                         }
1549
1550                     } else {
1551
1552                         try {
1553
1554 //                            newGraph.state.barrier.inc();
1555
1556                             T t = request.perform(newGraph);
1557
1558                             try {
1559
1560                                 if(result != null) result.set(t);
1561                                 procedure.execute(newGraph, t);
1562
1563                             } catch (Throwable th) {
1564
1565                                 if(throwable != null) {
1566                                     throwable.set(th);
1567                                 } else {
1568                                     Logger.defaultLogError("Unhandled exception", th);
1569                                 }
1570
1571                             }
1572
1573                         } catch (Throwable t) {
1574
1575                             if (DEBUG)
1576                                 t.printStackTrace();
1577
1578                             if(throwable != null) {
1579                                 throwable.set(t);
1580                             } else {
1581                                 Logger.defaultLogError("Unhandled exception", t);
1582                             }
1583
1584                             try {
1585
1586                                 procedure.exception(newGraph, t);
1587
1588                             } catch (Throwable t2) {
1589
1590                                 if(throwable != null) {
1591                                     throwable.set(t2);
1592                                 } else {
1593                                     Logger.defaultLogError("Unhandled exception", t2);
1594                                 }
1595
1596                             }
1597
1598                         }
1599
1600 //                        newGraph.state.barrier.dec();
1601 //                        newGraph.waitAsync(request);
1602
1603                     }
1604
1605                 } finally {
1606
1607                     fireSessionVariableChange(SessionVariables.QUEUED_READS);
1608
1609                 }
1610
1611             }
1612
1613         });
1614
1615     }
1616
1617     public <T> void scheduleRequest(final AsyncRead<T> request, final AsyncProcedure<T> procedure, final ListenerBase listener, final Semaphore notify) {
1618
1619         assert (request != null);
1620         assert (procedure != null);
1621
1622         int thread = request.hashCode() & queryProvider2.THREAD_MASK;
1623
1624         requestManager.scheduleRead(new SessionRead(null, notify) {
1625
1626             @Override
1627             public void run(int thread) {
1628
1629                 fireSessionVariableChange(SessionVariables.QUEUED_READS);
1630
1631                 final ReadGraphImpl newGraph = ReadGraphImpl.create(getQueryProvider2());
1632
1633                 try {
1634
1635                     if (listener != null) {
1636
1637                         try {
1638                                 QueryCacheBase.resultAsyncReadEntry(newGraph, request, null, listener, procedure);
1639                                 //QueryCache.runnerAsyncReadEntry(newGraph, request, null, listener, procedure, true);
1640                                                         //newGraph.processor.query(newGraph, request, null, procedure, listener);
1641                                                 } catch (DatabaseException e) {
1642                                                         Logger.defaultLogError(e);
1643                                                 }
1644
1645                     } else {
1646
1647 //                        final ResultCallWrappedSingleQueryProcedure4<T> wrapper = new ResultCallWrappedSingleQueryProcedure4<T>(
1648 //                                procedure, "request");
1649
1650                         BlockingAsyncProcedure<T> wrap = new BlockingAsyncProcedure<T>(newGraph, procedure, request);
1651
1652                         try {
1653
1654                             request.perform(newGraph, wrap);
1655                             wrap.get();
1656
1657                         } catch (DatabaseException e) {
1658
1659                                                         Logger.defaultLogError(e);
1660
1661                         }
1662
1663                     }
1664
1665                 } finally {
1666
1667                     fireSessionVariableChange(SessionVariables.QUEUED_READS);
1668
1669                 }
1670
1671             }
1672
1673         });
1674
1675     }
1676
1677     public <T> void scheduleRequest(final MultiRead<T> request, final SyncMultiProcedure<T> procedure, final Semaphore notify) {
1678
1679         assert (request != null);
1680         assert (procedure != null);
1681
1682         int thread = request.hashCode() & queryProvider2.THREAD_MASK;
1683
1684         int sync = notify != null ? thread : -1;
1685
1686         requestManager.scheduleRead(new SessionRead(null, notify) {
1687
1688             @Override
1689             public void run(int thread) {
1690
1691                 fireSessionVariableChange(SessionVariables.QUEUED_READS);
1692
1693                 ListenerBase listener = getListenerBase(procedure);
1694
1695                 final ReadGraphImpl newGraph = ReadGraphImpl.create(getQueryProvider2());
1696
1697                 try {
1698
1699                     if (listener != null) {
1700
1701                         newGraph.processor.query(newGraph, request, null, procedure, listener);
1702
1703 //                        newGraph.waitAsync(request);
1704
1705                     } else {
1706
1707                         final ResultCallWrappedSyncQueryProcedure<T> wrapper = new ResultCallWrappedSyncQueryProcedure<T>(procedure);
1708
1709                         try {
1710
1711                             request.perform(newGraph, wrapper);
1712
1713                         } catch (Throwable t) {
1714
1715                             t.printStackTrace();
1716
1717                         }
1718
1719                     }
1720
1721                 } finally {
1722
1723                     fireSessionVariableChange(SessionVariables.QUEUED_READS);
1724
1725                 }
1726
1727             }
1728
1729         });
1730
1731     }
1732
1733     public <T> void scheduleRequest(final AsyncMultiRead<T> request, final AsyncMultiProcedure<T> procedure, final Semaphore notify) {
1734
1735         assert (request != null);
1736         assert (procedure != null);
1737
1738         int thread = request.hashCode() & queryProvider2.THREAD_MASK;
1739
1740         int sync = notify != null ? thread : -1;
1741
1742         requestManager.scheduleRead(new SessionRead(null, notify) {
1743
1744             @Override
1745             public void run(int thread) {
1746
1747                 fireSessionVariableChange(SessionVariables.QUEUED_READS);
1748
1749                 ListenerBase listener = getListenerBase(procedure);
1750
1751                 final ReadGraphImpl newGraph = ReadGraphImpl.create(getQueryProvider2());
1752
1753                 try {
1754
1755                     if (listener != null) {
1756
1757                         newGraph.processor.query(newGraph, request, null, procedure, listener);
1758
1759 //                        newGraph.waitAsync(request);
1760
1761                     } else {
1762
1763                         final ResultCallWrappedQueryProcedure4<T> wrapper = new ResultCallWrappedQueryProcedure4<T>(procedure);
1764
1765                         try {
1766
1767                             request.perform(newGraph, wrapper);
1768
1769                         } catch (Throwable t) {
1770
1771                             t.printStackTrace();
1772
1773                         }
1774
1775                     }
1776
1777                 } finally {
1778
1779                     fireSessionVariableChange(SessionVariables.QUEUED_READS);
1780
1781                 }
1782
1783             }
1784
1785         });
1786
1787     }
1788
1789     public <T> void scheduleRequest(final ExternalRead<T> request, final Procedure<T> procedure, final Semaphore notify, final DataContainer<Throwable> throwable, final DataContainer<T> result) {
1790
1791         assert (request != null);
1792         assert (procedure != null);
1793
1794         int thread = request.hashCode() & queryProvider2.THREAD_MASK;
1795
1796         requestManager.scheduleRead(new SessionRead(throwable, notify) {
1797
1798             @Override
1799             public void run(int thread) {
1800
1801                 fireSessionVariableChange(SessionVariables.QUEUED_READS);
1802
1803                 ListenerBase listener = getListenerBase(procedure);
1804
1805                 final ReadGraphImpl newGraph = ReadGraphImpl.create(getQueryProvider2());
1806
1807                 try {
1808
1809                     if (listener != null) {
1810
1811                         try {
1812                             QueryCacheBase.resultExternalReadEntry(newGraph, request, null, listener, procedure);
1813                         } catch (DatabaseException e) {
1814                             Logger.defaultLogError(e);
1815                         }
1816
1817                     } else {
1818
1819 //                        newGraph.state.barrier.inc();
1820
1821                         request.register(newGraph, new Listener<T>() {
1822
1823                             @Override
1824                             public void exception(Throwable t) {
1825                                 if(throwable != null) throwable.set(t);
1826                                 procedure.exception(t);
1827 //                                newGraph.state.barrier.dec();
1828                             }
1829
1830                             @Override
1831                             public void execute(T t) {
1832                                 if(result != null) result.set(t);
1833                                 procedure.execute(t);
1834 //                                newGraph.state.barrier.dec();
1835                             }
1836
1837                             @Override
1838                             public boolean isDisposed() {
1839                                 return true;
1840                             }
1841
1842                         });
1843
1844 //                        newGraph.waitAsync(request);
1845
1846                     }
1847
1848                 } finally {
1849
1850                     fireSessionVariableChange(SessionVariables.QUEUED_READS);
1851
1852                 }
1853
1854             }
1855
1856         });
1857
1858     }
1859
1860
1861     @Override
1862     public <T> void asyncRequest(final Read<T> request, final AsyncProcedure<T> procedure) {
1863
1864         scheduleRequest(request, procedure, null, null, null);
1865
1866     }
1867
1868     @Override
1869     public <T> T syncRequest(Read<T> request, AsyncProcedure<T> procedure) throws DatabaseException {
1870         assertNotSession();
1871         Semaphore notify = new Semaphore(0);
1872         DataContainer<Throwable> container = new DataContainer<Throwable>();
1873         DataContainer<T> result = new DataContainer<T>();
1874         scheduleRequest(request, procedure, notify, container, result);
1875         acquire(notify, request);
1876         Throwable throwable = container.get();
1877         if(throwable != null) {
1878             if(throwable instanceof DatabaseException) throw (DatabaseException)throwable;
1879             else throw new DatabaseException("Unexpected exception", throwable);
1880         }
1881         return result.get();
1882     }
1883
1884     @Override
1885     public <T> T syncRequest(AsyncRead<T> request, final AsyncProcedure<T> procedure) throws DatabaseException {
1886         assertNotSession();
1887         Semaphore notify = new Semaphore(0);
1888         final DataContainer<Throwable> exceptionContainer = new DataContainer<Throwable>();
1889         final DataContainer<T> resultContainer = new DataContainer<T>();
1890         scheduleRequest(request, new AsyncProcedure<T>() {
1891             @Override
1892             public void exception(AsyncReadGraph graph, Throwable throwable) {
1893                 exceptionContainer.set(throwable);
1894                 procedure.exception(graph, throwable);
1895             }
1896             @Override
1897             public void execute(AsyncReadGraph graph, T result) {
1898                 resultContainer.set(result);
1899                 procedure.execute(graph, result);
1900             }
1901         }, getListenerBase(procedure), notify);
1902         acquire(notify, request, procedure);
1903         Throwable throwable = exceptionContainer.get();
1904         if (throwable != null) {
1905             if(throwable instanceof DatabaseException) throw (DatabaseException)throwable;
1906             else throw new DatabaseException("Unexpected exception", throwable);
1907         }
1908         return resultContainer.get();
1909     }
1910
1911
1912     @Override
1913     public <T> Collection<T> syncRequest(AsyncMultiRead<T> request, final AsyncMultiProcedure<T> procedure) throws DatabaseException {
1914         assertNotSession();
1915         Semaphore notify = new Semaphore(0);
1916         final DataContainer<Throwable> exceptionContainer = new DataContainer<Throwable>();
1917         scheduleRequest(request, new AsyncMultiProcedure<T>() {
1918             @Override
1919             public void exception(AsyncReadGraph graph, Throwable throwable) {
1920                 exceptionContainer.set(throwable);
1921                 procedure.exception(graph, throwable);
1922             }
1923             @Override
1924             public void execute(AsyncReadGraph graph, T result) {
1925                 procedure.execute(graph, result);
1926             }
1927             @Override
1928             public void finished(AsyncReadGraph graph) {
1929                 procedure.finished(graph);
1930             }
1931         }, notify);
1932         acquire(notify, request, procedure);
1933         Throwable throwable = exceptionContainer.get();
1934         if (throwable != null) {
1935             if(throwable instanceof DatabaseException) throw (DatabaseException)throwable;
1936             else throw new DatabaseException("Unexpected exception", throwable);
1937         }
1938         // TODO: implement return value
1939         System.err.println("TODO: implement return value for syncRequest(AsyncMultiRead, AsyncMultiProcedure)");
1940         return null;
1941     }
1942
1943     @Override
1944     public <T> T syncRequest(final ExternalRead<T> request) throws DatabaseException {
1945         return syncRequest(request, new ProcedureAdapter<T>());
1946
1947
1948 //        assert(request != null);
1949 //
1950 //        final DataContainer<T> result = new DataContainer<T>();
1951 //        final DataContainer<Throwable> exception = new DataContainer<Throwable>();
1952 //
1953 //        syncRequest(request, new Procedure<T>() {
1954 //
1955 //            @Override
1956 //            public void execute(T t) {
1957 //                result.set(t);
1958 //            }
1959 //
1960 //            @Override
1961 //            public void exception(Throwable t) {
1962 //                exception.set(t);
1963 //            }
1964 //
1965 //        });
1966 //
1967 //        Throwable t = exception.get();
1968 //        if(t != null) {
1969 //            if(t instanceof DatabaseException) throw (DatabaseException)t;
1970 //            else throw new DatabaseException("Unexpected exception in ReadGraph.syncRequest(PrimitiveRead)", t);
1971 //        }
1972 //
1973 //        return result.get();
1974
1975     }
1976
1977     @Override
1978     public <T> T syncRequest(ExternalRead<T> request, final Listener<T> procedure) throws DatabaseException {
1979         return syncRequest(request, (Procedure<T>)procedure);
1980     }
1981
1982
1983 //    @Override
1984 //    public <T> T syncRequest(Read<T> request, AsyncProcedure<T> procedure) throws DatabaseException {
1985 //        assertNotSession();
1986 //        Semaphore notify = new Semaphore(0);
1987 //        DataContainer<Throwable> container = new DataContainer<Throwable>();
1988 //        DataContainer<T> result = new DataContainer<T>();
1989 //        scheduleRequest(request, procedure, notify, container, result);
1990 //        acquire(notify, request);
1991 //        Throwable throwable = container.get();
1992 //        if(throwable != null) {
1993 //            if(throwable instanceof DatabaseException) throw (DatabaseException)throwable;
1994 //            else throw new DatabaseException("Unexpected exception", throwable);
1995 //        }
1996 //        return result.get();
1997 //    }
1998
1999
2000     @Override
2001     public <T> T syncRequest(ExternalRead<T> request, final Procedure<T> procedure) throws DatabaseException {
2002         assertNotSession();
2003         Semaphore notify = new Semaphore(0);
2004         final DataContainer<Throwable> container = new DataContainer<Throwable>();
2005         final DataContainer<T> result = new DataContainer<T>();
2006         scheduleRequest(request, procedure, notify, container, result);
2007         acquire(notify, request);
2008         Throwable throwable = container.get();
2009         if (throwable != null) {
2010             if(throwable instanceof DatabaseException) throw (DatabaseException)throwable;
2011             else throw new DatabaseException("Unexpected exception", throwable);
2012         }
2013         return result.get();
2014     }
2015
2016     @Override
2017     public void syncRequest(Write request) throws DatabaseException  {
2018         assertNotSession();
2019         assertAlive();
2020         Semaphore notify = new Semaphore(0);
2021         final DataContainer<DatabaseException> exception = new DataContainer<DatabaseException>();
2022         scheduleRequest(request, e -> exception.set(e), notify);
2023         acquire(notify, request);
2024         if(exception.get() != null) throw exception.get();
2025     }
2026
2027     @Override
2028     public <T> T syncRequest(WriteResult<T> request) throws DatabaseException  {
2029         assertNotSession();
2030         Semaphore notify = new Semaphore(0);
2031         final DataContainer<Throwable> exception = new DataContainer<Throwable>();
2032         final DataContainer<T> result = new DataContainer<T>();
2033         scheduleRequest(request, new Procedure<T>() {
2034
2035             @Override
2036             public void exception(Throwable t) {
2037               exception.set(t);
2038             }
2039
2040             @Override
2041             public void execute(T t) {
2042               result.set(t);
2043             }
2044
2045         }, notify);
2046         acquire(notify, request);
2047         if(exception.get() != null) {
2048             Throwable t = exception.get();
2049             if(t instanceof DatabaseException) throw (DatabaseException)t;
2050             else throw new DatabaseException(t);
2051         }
2052         return result.get();
2053     }
2054
2055     @Override
2056     public <T> T syncRequest(WriteOnlyResult<T> request) throws DatabaseException  {
2057         assertNotSession();
2058         Semaphore notify = new Semaphore(0);
2059         final DataContainer<Throwable> exception = new DataContainer<Throwable>();
2060         final DataContainer<T> result = new DataContainer<T>();
2061         scheduleRequest(request, new Procedure<T>() {
2062
2063             @Override
2064             public void exception(Throwable t) {
2065               exception.set(t);
2066             }
2067
2068             @Override
2069             public void execute(T t) {
2070               result.set(t);
2071             }
2072
2073         }, notify);
2074         acquire(notify, request);
2075         if(exception.get() != null) {
2076             Throwable t = exception.get();
2077             if(t instanceof DatabaseException) throw (DatabaseException)t;
2078             else throw new DatabaseException(t);
2079         }
2080         return result.get();
2081     }
2082
2083     @Override
2084     public <T> T syncRequest(DelayedWriteResult<T> request) throws DatabaseException  {
2085         assertNotSession();
2086         Semaphore notify = new Semaphore(0);
2087         final DataContainer<Throwable> exception = new DataContainer<Throwable>();
2088         final DataContainer<T> result = new DataContainer<T>();
2089         scheduleRequest(request, new Procedure<T>() {
2090
2091             @Override
2092             public void exception(Throwable t) {
2093               exception.set(t);
2094             }
2095
2096             @Override
2097             public void execute(T t) {
2098               result.set(t);
2099             }
2100
2101         }, notify);
2102         acquire(notify, request);
2103         if(exception.get() != null) {
2104             Throwable t = exception.get();
2105             if(t instanceof DatabaseException) throw (DatabaseException)t;
2106             else throw new DatabaseException(t);
2107         }
2108         return result.get();
2109     }
2110
2111     @Override
2112     public void syncRequest(DelayedWrite request) throws DatabaseException  {
2113         assertNotSession();
2114         Semaphore notify = new Semaphore(0);
2115         final DataContainer<DatabaseException> exception = new DataContainer<DatabaseException>();
2116         scheduleRequest(request, e -> exception.set(e), notify);
2117         acquire(notify, request);
2118         if(exception.get() != null) throw exception.get();
2119     }
2120
2121     @Override
2122     public void syncRequest(WriteOnly request) throws DatabaseException  {
2123         assertNotSession();
2124         assertAlive();
2125         Semaphore notify = new Semaphore(0);
2126         final DataContainer<DatabaseException> exception = new DataContainer<DatabaseException>();
2127         scheduleRequest(request, e -> exception.set(e), notify);
2128         acquire(notify, request);
2129         if(exception.get() != null) throw exception.get();
2130     }
2131
2132     /*
2133      *
2134      * GraphRequestProcessor interface
2135      */
2136
2137     @Override
2138     public <T> void asyncRequest(final AsyncRead<T> request, final AsyncProcedure<T> procedure) {
2139
2140         scheduleRequest(request, procedure, null, null);
2141
2142     }
2143
2144     @Override
2145     public <T> void asyncRequest(final AsyncMultiRead<T> request, final AsyncMultiProcedure<T> procedure) {
2146
2147         scheduleRequest(request, procedure, null);
2148
2149     }
2150
2151     @Override
2152     public <T> void asyncRequest(final ExternalRead<T> request, final Procedure<T> procedure) {
2153
2154         scheduleRequest(request, procedure, null, null, null);
2155
2156     }
2157
2158     @Override
2159     public void asyncRequest(final Write request, final Consumer<DatabaseException> callback) {
2160
2161         scheduleRequest(request, callback, null);
2162
2163     }
2164
2165     @Override
2166     public <T> void asyncRequest(final WriteResult<T> request, final Procedure<T> procedure) {
2167
2168         scheduleRequest(request, procedure, null);
2169
2170     }
2171
2172     @Override
2173     public <T> void asyncRequest(final WriteOnlyResult<T> request, final Procedure<T> procedure) {
2174
2175         scheduleRequest(request, procedure, null);
2176
2177     }
2178
2179     @Override
2180     public <T> void asyncRequest(final DelayedWriteResult<T> request, final Procedure<T> procedure) {
2181
2182         scheduleRequest(request, procedure, null);
2183
2184     }
2185
2186     @Override
2187     public void asyncRequest(final DelayedWrite request, final Consumer<DatabaseException> callback) {
2188
2189         scheduleRequest(request, callback, null);
2190
2191     }
2192
2193     @Override
2194     public void asyncRequest(final Write r) {
2195         asyncRequest(r, null);
2196     }
2197
2198     @Override
2199     public void asyncRequest(final DelayedWrite r) {
2200         asyncRequest(r, null);
2201     }
2202
2203     @Override
2204     public void asyncRequest(final WriteOnly request, final Consumer<DatabaseException> callback) {
2205
2206         scheduleRequest(request, callback, null);
2207
2208     }
2209
2210     @Override
2211     public void asyncRequest(final WriteOnly request) {
2212
2213         asyncRequest(request, null);
2214
2215     }
2216
2217     @Override
2218     public <T> void async(ReadInterface<T> r, AsyncProcedure<T> procedure) {
2219         r.request(this, procedure);
2220     }
2221
2222     @Override
2223     public <T> void async(ReadInterface<T> r, Procedure<T> procedure) {
2224         r.request(this, procedure);
2225     }
2226
2227     @Override
2228     public <T> void async(ReadInterface<T> r, SyncProcedure<T> procedure) {
2229         r.request(this, procedure);
2230     }
2231
2232     @Override
2233     public <T> void async(ReadInterface<T> r, AsyncListener<T> procedure) {
2234         r.request(this, procedure);
2235     }
2236
2237     @Override
2238     public <T> void async(ReadInterface<T> r, Listener<T> procedure) {
2239         r.request(this, procedure);
2240     }
2241
2242     @Override
2243     public <T> void async(ReadInterface<T> r, SyncListener<T> procedure) {
2244         r.request(this, procedure);
2245     }
2246
2247     @Override
2248     public <T> T sync(ReadInterface<T> r) throws DatabaseException {
2249         return r.request(this);
2250     }
2251
2252     @Override
2253     public <T> T sync(WriteInterface<T> r) throws DatabaseException {
2254         return r.request(this);
2255     }
2256
2257     @Override
2258     public <T> void async(WriteInterface<T> r, Procedure<T> procedure) {
2259         r.request(this, procedure);
2260     }
2261
2262     @Override
2263     public <T> void async(WriteInterface<T> r) {
2264         r.request(this, new ProcedureAdapter<T>());
2265     }
2266
2267     //@Override
2268     public void incAsync() {
2269         state.incAsync();
2270     }
2271
2272     //@Override
2273     public void decAsync() {
2274         state.decAsync();
2275     }
2276
2277     public long getCluster(ResourceImpl resource) {
2278         ClusterI cluster = clusterTable.getClusterByResourceKey(resource.id);
2279         return cluster.getClusterId();
2280     }
2281
2282     public long getCluster(int id) {
2283         if (clusterTable == null)
2284             System.out.println("SessionImplSocket.getCluster() clusterTable == null !!!!! how come");
2285         return clusterTable.getClusterIdByResourceKeyNoThrow(id);
2286     }
2287
2288     public ResourceImpl getResource(int id) {
2289         return new ResourceImpl(resourceSupport, id);
2290     }
2291
2292     public ResourceImpl getResource(int resourceIndex, long clusterId) {
2293         assert (!ClusterTraitsBase.isIllegalResourceIndex(resourceIndex));
2294         ClusterI proxy = clusterTable.getClusterByClusterId(clusterId);
2295         int key = proxy.getClusterKey();
2296         int resourceKey = ClusterTraitsBase.createResourceKeyNoThrow(key, resourceIndex);
2297         return new ResourceImpl(resourceSupport, resourceKey);
2298     }
2299
2300     public ResourceImpl getResource2(int id) {
2301         assert (id != 0);
2302         return new ResourceImpl(resourceSupport, id);
2303     }
2304
2305     final public int getId(ResourceImpl impl) {
2306         return impl.id;
2307     }
2308
2309     public static final Charset UTF8 = Charset.forName("utf-8");
2310
2311
2312
2313
2314     static boolean areVirtualStatementsLoaded(final VirtualGraphServerSupportImpl support, int subject) {
2315         for(TransientGraph g : support.providers) {
2316             if(g.isPending(subject)) return false;
2317         }
2318         return true;
2319     }
2320
2321     static boolean areVirtualStatementsLoaded(final VirtualGraphServerSupportImpl support, int subject, int predicate) {
2322         for(TransientGraph g : support.providers) {
2323             if(g.isPending(subject, predicate)) return false;
2324         }
2325         return true;
2326     }
2327
2328     static void loadVirtualStatements(final VirtualGraphServerSupportImpl support, ReadGraphImpl graph, int subject, final Consumer<ReadGraphImpl> runnable) {
2329
2330         Consumer<ReadGraphImpl> composite = new Consumer<ReadGraphImpl>() {
2331
2332             AtomicInteger ready = new AtomicInteger(support.providers.size() + 1);
2333
2334             @Override
2335             public void accept(ReadGraphImpl graph) {
2336                 if(ready.decrementAndGet() == 0) {
2337                     runnable.accept(graph);
2338                 }
2339             }
2340
2341         };
2342
2343         for(TransientGraph g : support.providers) {
2344             if(g.isPending(subject)) {
2345                 try {
2346                     g.load(graph, subject, composite);
2347                 } catch (DatabaseException e) {
2348                     e.printStackTrace();
2349                 }
2350             } else {
2351                 composite.accept(graph);
2352             }
2353         }
2354
2355         composite.accept(graph);
2356
2357     }
2358
2359     static  void loadVirtualStatements(final VirtualGraphServerSupportImpl support, ReadGraphImpl graph, int subject, int predicate, final Consumer<ReadGraphImpl> runnable) {
2360
2361         Consumer<ReadGraphImpl> composite = new Consumer<ReadGraphImpl>() {
2362
2363             AtomicInteger ready = new AtomicInteger(support.providers.size() + 1);
2364
2365             @Override
2366             public void accept(ReadGraphImpl graph) {
2367                 if(ready.decrementAndGet() == 0) {
2368                     runnable.accept(graph);
2369                 }
2370             }
2371
2372         };
2373
2374         for(TransientGraph g : support.providers) {
2375             if(g.isPending(subject, predicate)) {
2376                 try {
2377                     g.load(graph, subject, predicate, composite);
2378                 } catch (DatabaseException e) {
2379                     e.printStackTrace();
2380                 }
2381             } else {
2382                 composite.accept(graph);
2383             }
2384         }
2385
2386         composite.accept(graph);
2387
2388     }
2389
2390 //    void dumpHeap() {
2391 //
2392 //        try {
2393 //            ManagementFactory.newPlatformMXBeanProxy(ManagementFactory.getPlatformMBeanServer(),
2394 //                    "com.sun.management:type=HotSpotDiagnostic", HotSpotDiagnosticMXBean.class).dumpHeap(
2395 //                    "d:/heap" + flushCounter + ".txt", true);
2396 //        } catch (IOException e) {
2397 //            e.printStackTrace();
2398 //        }
2399 //
2400 //    }
2401
2402     void fireReactionsToSynchronize(ChangeSet cs) {
2403
2404         // Do not fire empty events
2405         if (cs.isEmpty())
2406             return;
2407
2408         ReadGraphImpl g = ReadGraphImpl.create(getQueryProvider2());
2409 //        g.state.barrier.inc();
2410
2411         try {
2412
2413             if (!cs.isEmpty()) {
2414                 ChangeEvent e2 = new ChangeEvent(g.getSession(), g, null, cs);
2415                 for (ChangeListener l : changeListeners2) {
2416                     try {
2417                         l.graphChanged(e2);
2418                     } catch (Exception ex) {
2419                         ex.printStackTrace();
2420                     }
2421                 }
2422             }
2423
2424         } finally {
2425
2426 //            g.state.barrier.dec();
2427 //            g.waitAsync(null);
2428
2429         }
2430
2431     }
2432
2433     void fireReactionsToCommit(ReadGraphImpl graph, ChangeSet cs2) {
2434         try {
2435
2436             // Do not fire empty events
2437             if (cs2.isEmpty())
2438                 return;
2439
2440 //            graph.restart();
2441 //            graph.state.barrier.inc();
2442
2443             try {
2444
2445                 if (!cs2.isEmpty()) {
2446
2447                     ChangeEvent e2 = new ChangeEvent(graph.getSession(), graph, null, cs2);
2448                     for (ChangeListener l : changeListeners2) {
2449                         try {
2450                             l.graphChanged(e2);
2451 //                            System.out.println("changelistener " + l);
2452                         } catch (Exception ex) {
2453                             ex.printStackTrace();
2454                         }
2455                     }
2456
2457                 }
2458
2459             } finally {
2460
2461 //                graph.state.barrier.dec();
2462 //                graph.waitAsync(null);
2463
2464             }
2465         } catch (Throwable t) {
2466             t.printStackTrace();
2467
2468         }
2469     }
2470     void fireMetadataListeners(WriteGraphImpl graph, ChangeSet cs2) {
2471
2472         try {
2473
2474             // Do not fire empty events
2475             if (cs2.isEmpty())
2476                 return;
2477
2478             // Do not fire on virtual requests
2479             if(graph.getProvider() != null)
2480                 return;
2481
2482             WriteGraphImpl reactionGraph = WriteGraphImpl.create(graph.processor, writeSupport, null);
2483
2484             try {
2485
2486                 ChangeEvent e2 = new ChangeEvent(graph.getSession(), reactionGraph, graph, cs2);
2487                 for (ChangeListener l : metadataListeners) {
2488                     try {
2489                         l.graphChanged(e2);
2490                     } catch (Throwable ex) {
2491                         ex.printStackTrace();
2492                     }
2493                 }
2494
2495             } finally {
2496
2497             }
2498
2499         } catch (Throwable t) {
2500             t.printStackTrace();
2501         }
2502
2503     }
2504
2505
2506     /*
2507      * (non-Javadoc)
2508      *
2509      * @see org.simantics.db.ServiceLocator#getService(java.lang.Class)
2510      */
2511     @Override
2512     public <T> T getService(Class<T> api) {
2513         T t = peekService(api);
2514         if (t == null) {
2515             if (state.isClosed())
2516                 throw new ServiceNotFoundException(this, api, "Session has been shut down");
2517             throw new ServiceNotFoundException(this, api);
2518         }
2519         return t;
2520     }
2521
2522     /**
2523      * @return
2524      */
2525     protected abstract ServerInformation getCachedServerInformation();
2526
2527         private Class<?> serviceKey1 = null;
2528         private Class<?> serviceKey2 = null;
2529         private Object service1 = null;
2530         private Object service2 = null;
2531
2532     /*
2533      * (non-Javadoc)
2534      *
2535      * @see
2536      * fi.vtt.simantics.db.connection.ServiceLocator#peekService(java.lang.Class)
2537      */
2538     @SuppressWarnings("unchecked")
2539     @Override
2540     public synchronized <T> T peekService(Class<T> api) {
2541
2542                 if(serviceKey1 == api) {
2543                         return (T)service1;
2544                 } else if (serviceKey2 == api) {
2545                         // Promote this key
2546                         Object result = service2;
2547                         service2 = service1;
2548                         serviceKey2 = serviceKey1;
2549                         service1 = result;
2550                         serviceKey1 = api;
2551                         return (T)result;
2552                 }
2553
2554         if (Layer0.class == api)
2555                 return (T) L0;
2556         if (ServerInformation.class == api)
2557             return (T) getCachedServerInformation();
2558         else if (WriteGraphImpl.class == api)
2559             return (T) writeState.getGraph();
2560         else if (ClusterBuilder.class == api)
2561             return (T)new ClusterBuilderImpl(this, (WriteOnlySupport)writeState.getGraph().writeSupport);
2562         else if (ClusterBuilderFactory.class == api)
2563             return (T)new ClusterBuilderFactoryImpl(this);
2564
2565                 service2 = service1;
2566                 serviceKey2 = serviceKey1;
2567
2568         service1 = serviceLocator.peekService(api);
2569         serviceKey1 = api;
2570
2571         return (T)service1;
2572
2573     }
2574
2575     /*
2576      * (non-Javadoc)
2577      *
2578      * @see
2579      * fi.vtt.simantics.db.connection.ServiceLocator#hasService(java.lang.Class)
2580      */
2581     @Override
2582     public boolean hasService(Class<?> api) {
2583         return serviceLocator.hasService(api);
2584     }
2585
2586     /**
2587      * @param api the api that must be implemented by the specified service
2588      * @param service the service implementation
2589      */
2590     @Override
2591     public <T> void registerService(Class<T> api, T service) {
2592         if(Layer0.class == api) {
2593                 L0 = (Layer0)service;
2594                 return;
2595         }
2596         serviceLocator.registerService(api, service);
2597         if (TransactionPolicySupport.class == api) {
2598             transactionPolicy = (TransactionPolicySupport)service;
2599             state.resetTransactionPolicy();
2600         }
2601         if (api == serviceKey1)
2602                 service1 = service;
2603         else if (api == serviceKey2)
2604                 service2 = service;
2605     }
2606
2607     // ----------------
2608     // SessionMonitor
2609     // ----------------
2610
2611     void fireSessionVariableChange(String variable) {
2612         for (MonitorHandler h : monitorHandlers) {
2613             MonitorContext ctx = monitorContexts.getLeft(h);
2614             assert ctx != null;
2615             // SafeRunner functionality repeated here to avoid dependency.
2616             try {
2617                 h.valuesChanged(ctx);
2618             } catch (Exception e) {
2619                 Logger.defaultLogError("monitor handler notification produced the following exception", e);
2620             } catch (LinkageError e) {
2621                 Logger.defaultLogError("monitor handler notification produced a linkage error", e);
2622             }
2623         }
2624     }
2625
2626
2627     class ResourceSerializerImpl implements ResourceSerializer {
2628
2629         public long createRandomAccessId(int id) throws DatabaseException {
2630             if(id < 0)
2631                 return id;
2632             int index = ClusterTraitsBase.getResourceIndexFromResourceKey(id);
2633             long cluster = getCluster(id);
2634             if (0 == cluster)
2635                 return 0; // Better to return 0 then invalid id.
2636             long result = ClusterTraitsBase.createResourceId(cluster, index);
2637             return result;
2638         }
2639
2640         @Override
2641         public long getRandomAccessId(Resource resource) throws DatabaseException {
2642
2643             ResourceImpl resourceImpl = (ResourceImpl) resource;
2644             return createRandomAccessId(resourceImpl.id);
2645
2646         }
2647
2648         @Override
2649         public int getTransientId(Resource resource) throws DatabaseException {
2650
2651             ResourceImpl resourceImpl = (ResourceImpl) resource;
2652             return resourceImpl.id;
2653
2654         }
2655
2656         @Override
2657         public String createRandomAccessId(Resource resource)
2658         throws InvalidResourceReferenceException {
2659
2660             if(resource == null) throw new IllegalArgumentException();
2661
2662             ResourceImpl resourceImpl = (ResourceImpl) resource;
2663
2664             if (resourceImpl.id < 0) return String.valueOf(resourceImpl.id) + "_0";
2665
2666             int r;
2667             try {
2668                 r = ClusterTraits.getResourceIndexFromResourceKey(resourceImpl.id);
2669             } catch (DatabaseException e1) {
2670                 throw new InvalidResourceReferenceException(e1);
2671             }
2672             try {
2673                 // Serialize as '<resource index>_<cluster id>'
2674                 return "" + r + "_" + getCluster(resourceImpl);
2675             } catch (Throwable e) {
2676                 e.printStackTrace();
2677                 throw new InvalidResourceReferenceException(e);
2678             } finally {
2679             }
2680         }
2681
2682         public int getTransientId(long serialized) throws DatabaseException {
2683             if (serialized <= 0)
2684                 return (int)serialized;
2685             int index = ClusterTraitsBase.getResourceIndexFromResourceId(serialized);
2686             long c = ClusterTraitsBase.getClusterIdFromResourceId(serialized);
2687             ClusterI cluster = clusterTranslator.getClusterByClusterId(c);
2688             if (cluster == null)
2689                 throw new DatabaseException("Couldn't load cluster for id " + c + " for resource id " + serialized);
2690             int key = ClusterTraits.createResourceKey(cluster.getClusterKey(), index);
2691             return key;
2692         }
2693
2694         @Override
2695         public Resource getResource(long randomAccessId) throws DatabaseException {
2696             return getResourceByKey(getTransientId(randomAccessId));
2697         }
2698
2699         @Override
2700         public Resource getResource(int transientId) throws DatabaseException {
2701             return getResourceByKey(transientId);
2702         }
2703
2704         @Override
2705         public Resource getResource(String randomAccessId)
2706         throws InvalidResourceReferenceException {
2707             try {
2708                 int i = randomAccessId.indexOf('_');
2709                 if (i == -1)
2710                     throw new InvalidResourceReferenceException("Could not parse resource id + cluster id from '"
2711                             + randomAccessId + "'");
2712                 int r = Integer.parseInt(randomAccessId.substring(0, i));
2713                 if(r < 0) return getResourceByKey(r);
2714                 long c = Long.parseLong(randomAccessId.substring(i + 1));
2715                 ClusterI cluster = clusterTranslator.getClusterByClusterId(c);
2716                 int key = ClusterTraits.createResourceKey(cluster.getClusterKey(), r);
2717                 if (cluster.hasResource(key, clusterTranslator))
2718                     return getResourceByKey(key);
2719             } catch (InvalidResourceReferenceException e) {
2720                 throw e;
2721             } catch (NumberFormatException e) {
2722                 throw new InvalidResourceReferenceException(e);
2723             } catch (Throwable e) {
2724                 e.printStackTrace();
2725                 throw new InvalidResourceReferenceException(e);
2726             } finally {
2727             }
2728             throw new InvalidResourceReferenceException("Resource does not exist " + randomAccessId);
2729         }
2730
2731         @Override
2732         public boolean disposeRandomAccessId(String randomAccessId) throws InvalidResourceReferenceException {
2733             try {
2734                 return true;
2735             } catch (Throwable e) {
2736                 e.printStackTrace();
2737                 throw new InvalidResourceReferenceException(e);
2738             } finally {
2739             }
2740         }
2741     }
2742
2743     // Copied from old SessionImpl
2744
2745     void check() {
2746         if (state.isClosed())
2747             throw new Error("Session closed.");
2748     }
2749
2750
2751
2752     public ResourceImpl getNewResource(long clusterId) {
2753         ClusterI cluster = clusterTable.getClusterByClusterIdOrThrow(clusterId);
2754         int newId;
2755         try {
2756             newId = cluster.createResource(clusterTranslator);
2757         } catch (DatabaseException e) {
2758             Logger.defaultLogError(e);
2759             return null;
2760         }
2761         return new ResourceImpl(resourceSupport, newId);
2762     }
2763
2764     public ResourceImpl getNewResource(Resource clusterSet)
2765     throws DatabaseException {
2766         long resourceId = clusterSet.getResourceId();
2767         Long clusterId = clusterSetsSupport.get(resourceId);
2768         if (null == clusterId)
2769             throw new ClusterSetExistException("Cluster set does not exist. Resource=" + clusterSet);
2770         if (Constants.NewClusterId == clusterId) {
2771             clusterId = getService(ClusteringSupport.class).createCluster();
2772             if ((serviceMode & SERVICE_MODE_CREATE) > 0)
2773                 createdClusters.add(clusterId);
2774             clusterSetsSupport.put(resourceId, clusterId);
2775             return getNewResource(clusterId);
2776         } else {
2777             ClusterBase cb = clusterTranslator.getClusterByClusterId(clusterId);
2778             ResourceImpl result;
2779             if (cb.getNumberOfResources(clusterTranslator) >= ClusterTable.CLUSTER_FILL_SIZE) {
2780                 clusterId = getService(ClusteringSupport.class).createCluster();
2781                 if ((serviceMode & SERVICE_MODE_CREATE) > 0)
2782                     createdClusters.add(clusterId);
2783                 clusterSetsSupport.put(resourceId, clusterId);
2784                 return getNewResource(clusterId);
2785             } else {
2786                 result = getNewResource(clusterId);
2787                 int resultKey = querySupport.getId(result);
2788                 long resultCluster = querySupport.getClusterId(resultKey);
2789                 if (clusterId != resultCluster)
2790                     clusterSetsSupport.put(resourceId, resultCluster);
2791                 return result;
2792             }
2793         }
2794     }
2795
2796     public void getNewClusterSet(Resource clusterSet)
2797     throws DatabaseException {
2798         if (DEBUG)
2799             System.out.println("new cluster set=" + clusterSet);
2800         long resourceId = clusterSet.getResourceId();
2801         if (clusterSetsSupport.containsKey(resourceId))
2802             throw new ClusterSetExistException("Cluster set exist already. Resource=" + clusterSet);
2803         clusterSetsSupport.put(resourceId, Constants.NewClusterId);
2804     }
2805     public boolean containsClusterSet(Resource clusterSet)
2806     throws ServiceException {
2807         long resourceId = clusterSet.getResourceId();
2808         return clusterSetsSupport.containsKey(resourceId);
2809     }
2810     public Resource setDefaultClusterSet4NewResource(Resource clusterSet) {
2811         Resource r = defaultClusterSet;
2812         defaultClusterSet = clusterSet;
2813         return r;
2814     }
2815     void printDiagnostics() {
2816
2817         if (DIAGNOSTICS) {
2818
2819             final DataContainer<Long> totalMem = new DataContainer<Long>(0L);
2820             final DataContainer<Long> residentClusters = new DataContainer<Long>(0L);
2821             for(ClusterI cluster : clusterTable.getClusters()) {
2822                 try {
2823                     if (cluster.isLoaded() && !cluster.isEmpty()) {
2824                         residentClusters.set(residentClusters.get() + 1);
2825                         totalMem.set(totalMem.get() + cluster.getUsedSpace());
2826                     }
2827                 } catch (DatabaseException e) {
2828                     Logger.defaultLogError(e);
2829                 }
2830             }
2831
2832             System.out.println("--------------------------------");
2833             System.out.println("Cluster information:");
2834             System.out.println("-amount of resident clusters=" + residentClusters.get());
2835             System.out.println("-total memory usage=" + totalMem.get() / 1024 + "kB");
2836
2837             for(ClusterI cluster : clusterTable.getClusters()) {
2838                 System.out.print("Cluster " + cluster.getClusterId() + " [");
2839                 try {
2840                     if (!cluster.isLoaded())
2841                         System.out.println("not loaded]");
2842                     else if (cluster.isEmpty())
2843                         System.out.println("is empty]");
2844                     else {
2845                         System.out.print("resources=" + cluster.getNumberOfResources(clusterTranslator));
2846                         System.out.print(",references=" + cluster.getReferenceCount());
2847                         System.out.println(",memory=" + cluster.getUsedSpace() / 1024 + "kB]");
2848                     }
2849                 } catch (DatabaseException e) {
2850                     Logger.defaultLogError(e);
2851                     System.out.println("is corrupted]");
2852                 }
2853             }
2854
2855             queryProvider2.printDiagnostics();
2856             System.out.println("--------------------------------");
2857         }
2858
2859     }
2860
2861     public void fireStartReadTransaction() {
2862
2863         if (DIAGNOSTICS)
2864             System.out.println("StartReadTransaction");
2865
2866         for (SessionEventListener listener : eventListeners) {
2867             try {
2868                 listener.readTransactionStarted();
2869             } catch (Throwable t) {
2870                 t.printStackTrace();
2871             }
2872         }
2873
2874     }
2875
2876     public void fireFinishReadTransaction() {
2877
2878         if (DIAGNOSTICS)
2879             System.out.println("FinishReadTransaction");
2880
2881         for (SessionEventListener listener : eventListeners) {
2882             try {
2883                 listener.readTransactionFinished();
2884             } catch (Throwable t) {
2885                 t.printStackTrace();
2886             }
2887         }
2888
2889     }
2890
2891     public void fireStartWriteTransaction() {
2892
2893         if (DIAGNOSTICS)
2894             System.out.println("StartWriteTransaction");
2895
2896         for (SessionEventListener listener : eventListeners) {
2897             try {
2898                 listener.writeTransactionStarted();
2899             } catch (Throwable t) {
2900                 t.printStackTrace();
2901             }
2902         }
2903
2904     }
2905
2906     public void fireFinishWriteTransaction() {
2907
2908         if (DIAGNOSTICS)
2909             System.out.println("FinishWriteTransaction");
2910
2911         for (SessionEventListener listener : eventListeners) {
2912             try {
2913                 listener.writeTransactionFinished();
2914             } catch (Throwable t) {
2915                 t.printStackTrace();
2916             }
2917         }
2918
2919         Indexing.resetDependenciesIndexingDisabled();
2920
2921     }
2922
2923     Resource deserialize(final long resourceId, final long clusterId) throws IOException {
2924         throw new Error("Not supported at the moment.");
2925     }
2926
2927     State getState() {
2928         return state;
2929     }
2930
2931     ClusterTable getClusterTable() {
2932         return clusterTable;
2933     }
2934
2935     public GraphSession getGraphSession() {
2936         return graphSession;
2937     }
2938
2939     public QueryProcessor getQueryProvider2() {
2940         return queryProvider2;
2941     }
2942
2943     ClientChangesImpl getClientChanges() {
2944         return clientChanges;
2945     }
2946
2947     boolean getWriteOnly() {
2948         return writeOnly;
2949     }
2950
2951     static int counter = 0;
2952
2953     public void onClusterLoaded(long clusterId) {
2954
2955         clusterTable.updateSize();
2956
2957     }
2958
2959
2960
2961
2962     /*
2963      * Implementation of the interface RequestProcessor
2964      */
2965
2966     @Override
2967     public <T> T syncRequest(final Read<T> request) throws DatabaseException {
2968
2969         assertNotSession();
2970         assertAlive();
2971
2972         assert(request != null);
2973
2974         final DataContainer<T> result = new DataContainer<T>();
2975         final DataContainer<Throwable> exception = new DataContainer<Throwable>();
2976
2977         syncRequest(request, new AsyncProcedure<T>() {
2978
2979             @Override
2980             public void execute(AsyncReadGraph graph, T t) {
2981                 result.set(t);
2982             }
2983
2984             @Override
2985             public void exception(AsyncReadGraph graph, Throwable t) {
2986                 exception.set(t);
2987             }
2988
2989         });
2990
2991         Throwable t = exception.get();
2992         if(t != null) {
2993             if(t instanceof DatabaseException) throw (DatabaseException)t;
2994             else throw new DatabaseException("Unexpected exception in ReadGraph.syncRequest(Read)", t);
2995         }
2996
2997         return result.get();
2998
2999     }
3000
3001 //    @Override
3002 //    public <T> T syncRequest(Read<T> request, AsyncListener<T> procedure) throws DatabaseException {
3003 //        assertNotSession();
3004 //        return syncRequest(request, (AsyncProcedure<T>)procedure);
3005 //    }
3006
3007     @Override
3008     public <T> T syncRequest(Read<T> request, SyncListener<T> procedure) throws DatabaseException {
3009         assertNotSession();
3010         return syncRequest(request, new SyncToAsyncListener<T>(procedure));
3011     }
3012
3013     @Override
3014     public <T> T syncRequest(Read<T> request, final Listener<T> procedure) throws DatabaseException {
3015         assertNotSession();
3016         return syncRequest(request, new NoneToAsyncListener<T>(procedure));
3017     }
3018
3019     @Override
3020     public <T> T syncRequest(final Read<T> request, final SyncProcedure<T> procedure) throws DatabaseException {
3021         assertNotSession();
3022         return syncRequest(request, new SyncToAsyncProcedure<T>(procedure));
3023     }
3024
3025     @Override
3026     public <T> T syncRequest(Read<T> request, Procedure<T> procedure) throws DatabaseException {
3027         assertNotSession();
3028         return syncRequest(request, new NoneToAsyncProcedure<T>(procedure));
3029     }
3030
3031     @Override
3032     public <T> T syncRequest(final AsyncRead<T> request) throws DatabaseException {
3033
3034         assertNotSession();
3035
3036         assert(request != null);
3037
3038         final DataContainer<T> result = new DataContainer<T>();
3039         final DataContainer<Throwable> exception = new DataContainer<Throwable>();
3040
3041         syncRequest(request, new AsyncProcedure<T>() {
3042
3043             @Override
3044             public void execute(AsyncReadGraph graph, T t) {
3045                 result.set(t);
3046             }
3047
3048             @Override
3049             public void exception(AsyncReadGraph graph, Throwable t) {
3050                 exception.set(t);
3051             }
3052
3053         });
3054
3055         Throwable t = exception.get();
3056         if(t != null) {
3057             if(t instanceof DatabaseException) throw (DatabaseException)t;
3058             else throw new DatabaseException("Unexpected exception in ReadGraph.syncRequest(Read)", t);
3059         }
3060
3061         return result.get();
3062
3063     }
3064
3065     @Override
3066     public <T> T syncRequest(AsyncRead<T> request, AsyncListener<T> procedure) throws DatabaseException {
3067         assertNotSession();
3068         return syncRequest(request, (AsyncProcedure<T>)procedure);
3069     }
3070
3071     @Override
3072     public <T> T syncRequest(AsyncRead<T> request, SyncListener<T> procedure) throws DatabaseException {
3073         assertNotSession();
3074         return syncRequest(request, new SyncToAsyncListener<T>(procedure));
3075     }
3076
3077     @Override
3078     public <T> T syncRequest(AsyncRead<T> request, Listener<T> procedure) throws DatabaseException {
3079         assertNotSession();
3080         return syncRequest(request, new NoneToAsyncListener<T>(procedure));
3081     }
3082
3083     @Override
3084     public <T> T syncRequest(AsyncRead<T> request, final SyncProcedure<T> procedure) throws DatabaseException {
3085         assertNotSession();
3086         return syncRequest(request, new SyncToAsyncProcedure<T>(procedure));
3087     }
3088
3089     @Override
3090     final public <T> T syncRequest(final AsyncRead<T> request, final Procedure<T> procedure) throws DatabaseException {
3091         assertNotSession();
3092         return syncRequest(request, new NoneToAsyncProcedure<T>(procedure));
3093     }
3094
3095     @Override
3096     public <T> Collection<T> syncRequest(MultiRead<T> request) throws DatabaseException {
3097
3098         assertNotSession();
3099
3100         assert(request != null);
3101
3102         final ArrayList<T> result = new ArrayList<T>();
3103         final DataContainer<Throwable> exception = new DataContainer<Throwable>();
3104
3105         syncRequest(request, new SyncMultiProcedure<T>() {
3106
3107             @Override
3108             public void execute(ReadGraph graph, T t) {
3109                 synchronized(result) {
3110                     result.add(t);
3111                 }
3112             }
3113
3114             @Override
3115             public void finished(ReadGraph graph) {
3116             }
3117
3118             @Override
3119             public void exception(ReadGraph graph, Throwable t) {
3120                 exception.set(t);
3121             }
3122
3123
3124         });
3125
3126         Throwable t = exception.get();
3127         if(t != null) {
3128             if(t instanceof DatabaseException) throw (DatabaseException)t;
3129             else throw new DatabaseException("Unexpected exception in ReadGraph.syncRequest(Read)", t);
3130         }
3131
3132         return result;
3133
3134     }
3135
3136     @Override
3137     public <T> Collection<T> syncRequest(MultiRead<T> arg0, SyncMultiProcedure<T> arg1) throws DatabaseException {
3138         assertNotSession();
3139         throw new Error("Not implemented!");
3140     }
3141
3142     @Override
3143     public <T> Collection<T> syncRequest(MultiRead<T> request, SyncMultiListener<T> procedure) throws DatabaseException {
3144         assertNotSession();
3145         return syncRequest(request, (SyncMultiProcedure<T>)procedure);
3146     }
3147
3148     @Override
3149     public <T> Collection<T> syncRequest(MultiRead<T> request, MultiListener<T> procedure) throws DatabaseException {
3150         assertNotSession();
3151         return syncRequest(request, new NoneToSyncMultiListener<T>(procedure));
3152     }
3153
3154     @Override
3155     public <T> Collection<T> syncRequest(MultiRead<T> request, MultiProcedure<T> procedure) throws DatabaseException {
3156         assertNotSession();
3157         return syncRequest(request, new NoneToSyncMultiProcedure<T>(procedure));
3158     }
3159
3160     @Override
3161     final public <T> Collection<T> syncRequest(final AsyncMultiRead<T> request) throws DatabaseException {
3162
3163         assertNotSession();
3164
3165         assert(request != null);
3166
3167         final ArrayList<T> result = new ArrayList<T>();
3168         final DataContainer<Throwable> exception = new DataContainer<Throwable>();
3169
3170         syncRequest(request, new AsyncMultiProcedure<T>() {
3171
3172             @Override
3173             public void execute(AsyncReadGraph graph, T t) {
3174                 synchronized(result) {
3175                     result.add(t);
3176                 }
3177             }
3178
3179             @Override
3180             public void finished(AsyncReadGraph graph) {
3181             }
3182
3183             @Override
3184             public void exception(AsyncReadGraph graph, Throwable t) {
3185                 exception.set(t);
3186             }
3187
3188
3189         });
3190
3191         Throwable t = exception.get();
3192         if(t != null) {
3193             if(t instanceof DatabaseException) throw (DatabaseException)t;
3194             else throw new DatabaseException("Unexpected exception in ReadGraph.syncRequest(Read)", t);
3195         }
3196
3197         return result;
3198
3199     }
3200
3201     @Override
3202     public <T> Collection<T> syncRequest(AsyncMultiRead<T> request, AsyncMultiListener<T> procedure) throws DatabaseException {
3203         assertNotSession();
3204         return syncRequest(request, (AsyncMultiProcedure<T>)procedure);
3205     }
3206
3207     @Override
3208     public <T> Collection<T> syncRequest(AsyncMultiRead<T> request, SyncMultiListener<T> procedure) throws DatabaseException {
3209         assertNotSession();
3210         return syncRequest(request, new SyncToAsyncMultiListener<T>(procedure));
3211     }
3212
3213     @Override
3214     public <T> Collection<T> syncRequest(AsyncMultiRead<T> request, MultiListener<T> procedure) throws DatabaseException {
3215         assertNotSession();
3216        return syncRequest(request, new NoneToAsyncMultiListener<T>(procedure));
3217     }
3218
3219     @Override
3220     public <T> Collection<T> syncRequest(AsyncMultiRead<T> request, final SyncMultiProcedure<T> procedure) throws DatabaseException {
3221         assertNotSession();
3222         return syncRequest(request, new SyncToAsyncMultiProcedure<T>(procedure));
3223     }
3224
3225     @Override
3226     final public <T> Collection<T> syncRequest(final AsyncMultiRead<T> request, final MultiProcedure<T> procedure) throws DatabaseException {
3227         assertNotSession();
3228         return syncRequest(request, new NoneToAsyncMultiProcedure<T>(procedure));
3229     }
3230
3231
3232     @Override
3233     public <T> void asyncRequest(Read<T> request) {
3234
3235         asyncRequest(request, new ProcedureAdapter<T>() {
3236             @Override
3237             public void exception(Throwable t) {
3238                 t.printStackTrace();
3239             }
3240         });
3241
3242     }
3243
3244     @Override
3245     public <T> void asyncRequest(Read<T> request, AsyncListener<T> procedure) {
3246         asyncRequest(request, (AsyncProcedure<T>)procedure);
3247     }
3248
3249     @Override
3250     public <T> void asyncRequest(Read<T> request, final SyncListener<T> procedure) {
3251         asyncRequest(request, new SyncToAsyncListener<T>(procedure));
3252     }
3253
3254     @Override
3255     public <T> void asyncRequest(Read<T> request, final Listener<T> procedure) {
3256         asyncRequest(request, new NoneToAsyncListener<T>(procedure));
3257     }
3258
3259     @Override
3260     public <T> void asyncRequest(Read<T> request, SyncProcedure<T> procedure) {
3261         asyncRequest(request, new SyncToAsyncProcedure<T>(procedure));
3262     }
3263
3264     @Override
3265     public <T> void asyncRequest(Read<T> request, final Procedure<T> procedure) {
3266         asyncRequest(request, new NoneToAsyncProcedure<T>(procedure));
3267     }
3268
3269     @Override
3270     final public <T> void asyncRequest(final AsyncRead<T> request) {
3271
3272         assert(request != null);
3273
3274         asyncRequest(request, new ProcedureAdapter<T>() {
3275             @Override
3276             public void exception(Throwable t) {
3277                 t.printStackTrace();
3278             }
3279         });
3280
3281     }
3282
3283     @Override
3284     public <T> void asyncRequest(AsyncRead<T> request, AsyncListener<T> procedure) {
3285         scheduleRequest(request, procedure, procedure, null);
3286     }
3287
3288     @Override
3289     public <T> void asyncRequest(AsyncRead<T> request, final SyncListener<T> procedure) {
3290         asyncRequest(request, new SyncToAsyncListener<T>(procedure));
3291     }
3292
3293     @Override
3294     public <T> void asyncRequest(AsyncRead<T> request, final Listener<T> procedure) {
3295         asyncRequest(request, new NoneToAsyncListener<T>(procedure));
3296     }
3297
3298     @Override
3299     public <T> void asyncRequest(AsyncRead<T> request, SyncProcedure<T> procedure) {
3300         asyncRequest(request, new SyncToAsyncProcedure<T>(procedure));
3301     }
3302
3303     @Override
3304     final public <T> void asyncRequest(final AsyncRead<T> request, final Procedure<T> procedure) {
3305         asyncRequest(request, new NoneToAsyncProcedure<T>(procedure));
3306     }
3307
3308     @Override
3309     public <T> void asyncRequest(MultiRead<T> request) {
3310
3311         assert(request != null);
3312
3313         asyncRequest(request, new SyncMultiProcedureAdapter<T>() {
3314             @Override
3315             public void exception(ReadGraph graph, Throwable t) {
3316                 t.printStackTrace();
3317             }
3318         });
3319
3320     }
3321
3322     @Override
3323     public <T> void asyncRequest(MultiRead<T> request, SyncMultiListener<T> procedure) {
3324         asyncRequest(request, (SyncMultiProcedure<T>)procedure);
3325     }
3326
3327     @Override
3328     public <T> void asyncRequest(MultiRead<T> request, MultiListener<T> procedure) {
3329         asyncRequest(request, new NoneToSyncMultiListener<T>(procedure));
3330     }
3331
3332     @Override
3333     public <T> void asyncRequest(MultiRead<T> request, SyncMultiProcedure<T> procedure) {
3334         scheduleRequest(request, procedure, null);
3335     }
3336
3337     @Override
3338     public <T> void asyncRequest(MultiRead<T> request, MultiProcedure<T> procedure) {
3339         asyncRequest(request, new NoneToSyncMultiProcedure<T>(procedure));
3340     }
3341
3342     @Override
3343     final public <T> void asyncRequest(AsyncMultiRead<T> request) {
3344
3345         assert(request != null);
3346
3347         asyncRequest(request, new AsyncMultiProcedureAdapter<T>() {
3348             @Override
3349             public void exception(AsyncReadGraph graph, Throwable t) {
3350                 t.printStackTrace();
3351             }
3352         });
3353
3354     }
3355
3356     @Override
3357     public <T> void asyncRequest(AsyncMultiRead<T> request, AsyncMultiListener<T> procedure) {
3358         asyncRequest(request, (AsyncMultiProcedure<T>)procedure);
3359     }
3360
3361     @Override
3362     public <T> void asyncRequest(AsyncMultiRead<T> request, SyncMultiListener<T> procedure) {
3363         asyncRequest(request, new SyncToAsyncMultiListener<T>(procedure));
3364     }
3365
3366     @Override
3367     public <T> void asyncRequest(AsyncMultiRead<T> request, MultiListener<T> procedure) {
3368         asyncRequest(request, new NoneToAsyncMultiListener<T>(procedure));
3369     }
3370
3371     @Override
3372     public <T> void asyncRequest(AsyncMultiRead<T> request, SyncMultiProcedure<T> procedure) {
3373         asyncRequest(request, new SyncToAsyncMultiProcedure<T>(procedure));
3374     }
3375
3376     @Override
3377     final public <T> void asyncRequest(AsyncMultiRead<T> request, final MultiProcedure<T> procedure) {
3378         asyncRequest(request, new NoneToAsyncMultiProcedure<T>(procedure));
3379     }
3380
3381     @Override
3382     final public <T> void asyncRequest(final ExternalRead<T> request) {
3383
3384         assert(request != null);
3385
3386         asyncRequest(request, new ProcedureAdapter<T>() {
3387             @Override
3388             public void exception(Throwable t) {
3389                 t.printStackTrace();
3390             }
3391         });
3392
3393     }
3394
3395     @Override
3396     public <T> void asyncRequest(ExternalRead<T> request, final Listener<T> procedure) {
3397         asyncRequest(request, (Procedure<T>)procedure);
3398     }
3399
3400
3401
3402     void check(Throwable t) throws DatabaseException {
3403         if(t != null) {
3404             if(t instanceof DatabaseException) throw (DatabaseException)t;
3405             else throw new DatabaseException("Unexpected exception", t);
3406         }
3407     }
3408
3409     void check(DataContainer<Throwable> container) throws DatabaseException {
3410         Throwable t = container.get();
3411         if(t != null) {
3412             if(t instanceof DatabaseException) throw (DatabaseException)t;
3413             else throw new DatabaseException("Unexpected exception", t);
3414         }
3415     }
3416
3417
3418
3419
3420
3421
3422     boolean sameProvider(Write request) {
3423         if(writeState.getGraph().provider != null) {
3424             return writeState.getGraph().provider.equals(request.getProvider());
3425         } else {
3426             return request.getProvider() == null;
3427         }
3428     }
3429
3430     boolean plainWrite(WriteGraphImpl graph) {
3431         if(graph == null) return false;
3432         if(graph.writeSupport.writeOnly()) return false;
3433         return true;
3434     }
3435
3436
3437     public static final ThreadGroup SessionThreadGroup = new ThreadGroup("Session Thread Group");
3438     private void assertNotSession() throws DatabaseException {
3439         Thread current = Thread.currentThread();
3440         if(sessionThreads.contains(current)) throw new DatabaseException("Caller is already inside a transaction.");
3441     }
3442
3443     void assertAlive() {
3444         if (!state.isAlive())
3445             throw new RuntimeDatabaseException("Session has been shut down.");
3446     }
3447
3448     public InputStream getValueStream(ReadGraphImpl graph, Resource resource) {
3449         return querySupport.getValueStream(graph, querySupport.getId(resource));
3450     }
3451
3452     public byte[] getValue(ReadGraphImpl graph, Resource resource) {
3453         return querySupport.getValue(graph, querySupport.getId(resource));
3454     }
3455
3456     <T> void acquire(Semaphore semaphore, T request) throws DatabaseException {
3457         acquire(semaphore, request, null);
3458     }
3459
3460     private <T,P> void acquire(Semaphore semaphore, T request, P procedure) throws DatabaseException {
3461         assertAlive();
3462         try {
3463             long tryCount = 0;
3464             // Loop until the semaphore is acquired reporting requests that take a long time.
3465             while (true) {
3466
3467                 if (semaphore.tryAcquire(DebugPolicy.LONG_EXECUTION_REPORT_PERIOD, DebugPolicy.LONG_EXECUTION_REPORT_PERIOD_UNIT)) {
3468                     // Acquired OK.
3469                     return;
3470                 } else {
3471                     if (DebugPolicy.REPORT_TIME_CONSUMING_REQUESTS) {
3472                         ++tryCount;
3473                         long waitTime = DebugPolicy.LONG_EXECUTION_REPORT_PERIOD_UNIT
3474                                 .toMillis(DebugPolicy.LONG_EXECUTION_REPORT_PERIOD)
3475                                 * tryCount;
3476                         System.err.println("DB client request '" + request + "' is taking long to execute, so far "
3477                                 + (waitTime) + " ms. (procedure=" + procedure + ")");
3478                     }
3479                 }
3480
3481                 assertAlive();
3482
3483             }
3484         } catch (InterruptedException e) {
3485             e.printStackTrace();
3486             // FIXME: Should perhaps do something else in this case ??
3487         }
3488     }
3489
3490
3491
3492 //    @Override
3493 //    public boolean holdOnToTransactionAfterCancel() {
3494 //        return transactionPolicy.holdOnToTransactionAfterCancel();
3495 //    }
3496 //
3497 //    @Override
3498 //    public boolean holdOnToTransactionAfterCommit() {
3499 //        return transactionPolicy.holdOnToTransactionAfterCommit();
3500 //    }
3501 //
3502 //    @Override
3503 //    public boolean holdOnToTransactionAfterRead() {
3504 //        return transactionPolicy.holdOnToTransactionAfterRead();
3505 //    }
3506 //
3507 //    @Override
3508 //    public void onRelinquish() {
3509 //        transactionPolicy.onRelinquish();
3510 //    }
3511 //
3512 //    @Override
3513 //    public void onRelinquishDone() {
3514 //        transactionPolicy.onRelinquishDone();
3515 //    }
3516 //
3517 //    @Override
3518 //    public void onRelinquishError() {
3519 //        transactionPolicy.onRelinquishError();
3520 //    }
3521
3522
3523     @Override
3524     public Session getSession() {
3525         return this;
3526     }
3527
3528
3529     protected abstract VirtualGraph getProvider(VirtualGraph virtualGraph);
3530     protected abstract ResourceImpl getNewResource() throws DatabaseException;
3531
3532     public void ceased(int thread) {
3533
3534         requestManager.ceased(thread);
3535
3536     }
3537
3538     public int getAmountOfQueryThreads() {
3539         // This must be a power of two
3540         return 1;
3541 //        return Integer.highestOneBit(Runtime.getRuntime().availableProcessors());
3542     }
3543
3544     public Resource getResourceByKey(int key) throws ResourceNotFoundException {
3545
3546         return new ResourceImpl(resourceSupport, key);
3547
3548     }
3549
3550     public void acquireWriteOnly() {
3551         writeOnly = true;
3552     }
3553
3554     public void releaseWriteOnly(ReadGraphImpl graph) {
3555         writeOnly = false;
3556         queryProvider2.releaseWrite(graph);
3557     }
3558
3559     public void handleUpdatesAndMetadata(WriteGraphImpl writer) {
3560
3561         long start = System.nanoTime();
3562
3563         while(dirtyPrimitives) {
3564             dirtyPrimitives = false;
3565             getQueryProvider2().performDirtyUpdates(writer);
3566             getQueryProvider2().performScheduledUpdates(writer);
3567         }
3568
3569         fireMetadataListeners(writer, clientChanges);
3570
3571         if(DebugPolicy.PERFORMANCE_DATA) {
3572             long end = System.nanoTime();
3573             System.err.println("handleUpdatesAndMetadata " + 1e-9*(end-start));
3574         }
3575
3576     }
3577
3578     void removeTemporaryData() {
3579         File platform = Platform.getLocation().toFile();
3580         File tempFiles = new File(platform, "tempFiles");
3581         File temp = new File(tempFiles, "db");
3582         if(!temp.exists())
3583             return;
3584         try {
3585             Files.walkFileTree(temp.toPath(), new SimpleFileVisitor<Path>() {
3586                 @Override
3587                 public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) {
3588                     try {
3589                         Files.delete(file);
3590                     } catch (IOException e) {
3591                         Logger.defaultLogError(e);
3592                     }
3593                     return FileVisitResult.CONTINUE;
3594                 }
3595             });
3596         } catch (IOException e) {
3597             Logger.defaultLogError(e);
3598         }
3599     }
3600
3601     public void handleCreatedClusters() {
3602         if ((serviceMode & SERVICE_MODE_CREATE) > 0) {
3603             createdClusters.forEach(new TLongProcedure() {
3604
3605                 @Override
3606                 public boolean execute(long value) {
3607                     ClusterImpl cluster = clusterTable.getClusterByClusterId(value);
3608                     cluster.setImmutable(true, clusterTranslator);
3609                     return true;
3610                 }
3611             });
3612         }
3613         createdClusters.clear();
3614     }
3615
3616     @Override
3617     public Object getModificationCounter() {
3618         return queryProvider2.modificationCounter;
3619     }
3620
3621     @Override
3622     public void markUndoPoint() {
3623         state.setCombine(false);
3624     }
3625
3626 }