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

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2010 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
1818 //                        newGraph.processor.query(newGraph, request, null, new Procedure<T>() {
1819 //
1820 //                            @Override
1821 //                            public void exception(Throwable t) {
1822 //                                procedure.exception(t);
1823 //                                if(throwable != null) {
1824 //                                    throwable.set(t);
1825 //                                }
1826 //                            }
1827 //
1828 //                            @Override
1829 //                            public void execute(T t) {
1830 //                                if(result != null) result.set(t);
1831 //                                procedure.execute(t);
1832 //                            }
1833 //
1834 //                        }, listener);
1835
1836 //                        newGraph.waitAsync(request);
1837
1838                     } else {
1839
1840 //                        newGraph.state.barrier.inc();
1841
1842                         request.register(newGraph, new Listener<T>() {
1843
1844                             @Override
1845                             public void exception(Throwable t) {
1846                                 if(throwable != null) throwable.set(t);
1847                                 procedure.exception(t);
1848 //                                newGraph.state.barrier.dec();
1849                             }
1850
1851                             @Override
1852                             public void execute(T t) {
1853                                 if(result != null) result.set(t);
1854                                 procedure.execute(t);
1855 //                                newGraph.state.barrier.dec();
1856                             }
1857
1858                             @Override
1859                             public boolean isDisposed() {
1860                                 return true;
1861                             }
1862
1863                         });
1864
1865 //                        newGraph.waitAsync(request);
1866
1867                     }
1868
1869                 } finally {
1870
1871                     fireSessionVariableChange(SessionVariables.QUEUED_READS);
1872
1873                 }
1874
1875             }
1876
1877         });
1878
1879     }
1880
1881
1882     @Override
1883     public <T> void asyncRequest(final Read<T> request, final AsyncProcedure<T> procedure) {
1884
1885         scheduleRequest(request, procedure, null, null, null);
1886
1887     }
1888
1889     @Override
1890     public <T> T syncRequest(Read<T> request, AsyncProcedure<T> procedure) throws DatabaseException {
1891         assertNotSession();
1892         Semaphore notify = new Semaphore(0);
1893         DataContainer<Throwable> container = new DataContainer<Throwable>();
1894         DataContainer<T> result = new DataContainer<T>();
1895         scheduleRequest(request, procedure, notify, container, result);
1896         acquire(notify, request);
1897         Throwable throwable = container.get();
1898         if(throwable != null) {
1899             if(throwable instanceof DatabaseException) throw (DatabaseException)throwable;
1900             else throw new DatabaseException("Unexpected exception", throwable);
1901         }
1902         return result.get();
1903     }
1904
1905     @Override
1906     public <T> T syncRequest(AsyncRead<T> request, final AsyncProcedure<T> procedure) throws DatabaseException {
1907         assertNotSession();
1908         Semaphore notify = new Semaphore(0);
1909         final DataContainer<Throwable> exceptionContainer = new DataContainer<Throwable>();
1910         final DataContainer<T> resultContainer = new DataContainer<T>();
1911         scheduleRequest(request, new AsyncProcedure<T>() {
1912             @Override
1913             public void exception(AsyncReadGraph graph, Throwable throwable) {
1914                 exceptionContainer.set(throwable);
1915                 procedure.exception(graph, throwable);
1916             }
1917             @Override
1918             public void execute(AsyncReadGraph graph, T result) {
1919                 resultContainer.set(result);
1920                 procedure.execute(graph, result);
1921             }
1922         }, getListenerBase(procedure), notify);
1923         acquire(notify, request, procedure);
1924         Throwable throwable = exceptionContainer.get();
1925         if (throwable != null) {
1926             if(throwable instanceof DatabaseException) throw (DatabaseException)throwable;
1927             else throw new DatabaseException("Unexpected exception", throwable);
1928         }
1929         return resultContainer.get();
1930     }
1931
1932
1933     @Override
1934     public <T> Collection<T> syncRequest(AsyncMultiRead<T> request, final AsyncMultiProcedure<T> procedure) throws DatabaseException {
1935         assertNotSession();
1936         Semaphore notify = new Semaphore(0);
1937         final DataContainer<Throwable> exceptionContainer = new DataContainer<Throwable>();
1938         scheduleRequest(request, new AsyncMultiProcedure<T>() {
1939             @Override
1940             public void exception(AsyncReadGraph graph, Throwable throwable) {
1941                 exceptionContainer.set(throwable);
1942                 procedure.exception(graph, throwable);
1943             }
1944             @Override
1945             public void execute(AsyncReadGraph graph, T result) {
1946                 procedure.execute(graph, result);
1947             }
1948             @Override
1949             public void finished(AsyncReadGraph graph) {
1950                 procedure.finished(graph);
1951             }
1952         }, notify);
1953         acquire(notify, request, procedure);
1954         Throwable throwable = exceptionContainer.get();
1955         if (throwable != null) {
1956             if(throwable instanceof DatabaseException) throw (DatabaseException)throwable;
1957             else throw new DatabaseException("Unexpected exception", throwable);
1958         }
1959         // TODO: implement return value
1960         System.err.println("TODO: implement return value for syncRequest(AsyncMultiRead, AsyncMultiProcedure)");
1961         return null;
1962     }
1963
1964     @Override
1965     public <T> T syncRequest(final ExternalRead<T> request) throws DatabaseException {
1966         return syncRequest(request, new ProcedureAdapter<T>());
1967
1968
1969 //        assert(request != null);
1970 //
1971 //        final DataContainer<T> result = new DataContainer<T>();
1972 //        final DataContainer<Throwable> exception = new DataContainer<Throwable>();
1973 //
1974 //        syncRequest(request, new Procedure<T>() {
1975 //
1976 //            @Override
1977 //            public void execute(T t) {
1978 //                result.set(t);
1979 //            }
1980 //
1981 //            @Override
1982 //            public void exception(Throwable t) {
1983 //                exception.set(t);
1984 //            }
1985 //
1986 //        });
1987 //
1988 //        Throwable t = exception.get();
1989 //        if(t != null) {
1990 //            if(t instanceof DatabaseException) throw (DatabaseException)t;
1991 //            else throw new DatabaseException("Unexpected exception in ReadGraph.syncRequest(PrimitiveRead)", t);
1992 //        }
1993 //
1994 //        return result.get();
1995
1996     }
1997
1998     @Override
1999     public <T> T syncRequest(ExternalRead<T> request, final Listener<T> procedure) throws DatabaseException {
2000         return syncRequest(request, (Procedure<T>)procedure);
2001     }
2002
2003
2004 //    @Override
2005 //    public <T> T syncRequest(Read<T> request, AsyncProcedure<T> procedure) throws DatabaseException {
2006 //        assertNotSession();
2007 //        Semaphore notify = new Semaphore(0);
2008 //        DataContainer<Throwable> container = new DataContainer<Throwable>();
2009 //        DataContainer<T> result = new DataContainer<T>();
2010 //        scheduleRequest(request, procedure, notify, container, result);
2011 //        acquire(notify, request);
2012 //        Throwable throwable = container.get();
2013 //        if(throwable != null) {
2014 //            if(throwable instanceof DatabaseException) throw (DatabaseException)throwable;
2015 //            else throw new DatabaseException("Unexpected exception", throwable);
2016 //        }
2017 //        return result.get();
2018 //    }
2019
2020
2021     @Override
2022     public <T> T syncRequest(ExternalRead<T> request, final Procedure<T> procedure) throws DatabaseException {
2023         assertNotSession();
2024         Semaphore notify = new Semaphore(0);
2025         final DataContainer<Throwable> container = new DataContainer<Throwable>();
2026         final DataContainer<T> result = new DataContainer<T>();
2027         scheduleRequest(request, procedure, notify, container, result);
2028         acquire(notify, request);
2029         Throwable throwable = container.get();
2030         if (throwable != null) {
2031             if(throwable instanceof DatabaseException) throw (DatabaseException)throwable;
2032             else throw new DatabaseException("Unexpected exception", throwable);
2033         }
2034         return result.get();
2035     }
2036
2037     @Override
2038     public void syncRequest(Write request) throws DatabaseException  {
2039         assertNotSession();
2040         assertAlive();
2041         Semaphore notify = new Semaphore(0);
2042         final DataContainer<DatabaseException> exception = new DataContainer<DatabaseException>();
2043         scheduleRequest(request, e -> exception.set(e), notify);
2044         acquire(notify, request);
2045         if(exception.get() != null) throw exception.get();
2046     }
2047
2048     @Override
2049     public <T> T syncRequest(WriteResult<T> request) throws DatabaseException  {
2050         assertNotSession();
2051         Semaphore notify = new Semaphore(0);
2052         final DataContainer<Throwable> exception = new DataContainer<Throwable>();
2053         final DataContainer<T> result = new DataContainer<T>();
2054         scheduleRequest(request, new Procedure<T>() {
2055
2056             @Override
2057             public void exception(Throwable t) {
2058               exception.set(t);
2059             }
2060
2061             @Override
2062             public void execute(T t) {
2063               result.set(t);
2064             }
2065
2066         }, notify);
2067         acquire(notify, request);
2068         if(exception.get() != null) {
2069             Throwable t = exception.get();
2070             if(t instanceof DatabaseException) throw (DatabaseException)t;
2071             else throw new DatabaseException(t);
2072         }
2073         return result.get();
2074     }
2075
2076     @Override
2077     public <T> T syncRequest(WriteOnlyResult<T> request) throws DatabaseException  {
2078         assertNotSession();
2079         Semaphore notify = new Semaphore(0);
2080         final DataContainer<Throwable> exception = new DataContainer<Throwable>();
2081         final DataContainer<T> result = new DataContainer<T>();
2082         scheduleRequest(request, new Procedure<T>() {
2083
2084             @Override
2085             public void exception(Throwable t) {
2086               exception.set(t);
2087             }
2088
2089             @Override
2090             public void execute(T t) {
2091               result.set(t);
2092             }
2093
2094         }, notify);
2095         acquire(notify, request);
2096         if(exception.get() != null) {
2097             Throwable t = exception.get();
2098             if(t instanceof DatabaseException) throw (DatabaseException)t;
2099             else throw new DatabaseException(t);
2100         }
2101         return result.get();
2102     }
2103
2104     @Override
2105     public <T> T syncRequest(DelayedWriteResult<T> request) throws DatabaseException  {
2106         assertNotSession();
2107         Semaphore notify = new Semaphore(0);
2108         final DataContainer<Throwable> exception = new DataContainer<Throwable>();
2109         final DataContainer<T> result = new DataContainer<T>();
2110         scheduleRequest(request, new Procedure<T>() {
2111
2112             @Override
2113             public void exception(Throwable t) {
2114               exception.set(t);
2115             }
2116
2117             @Override
2118             public void execute(T t) {
2119               result.set(t);
2120             }
2121
2122         }, notify);
2123         acquire(notify, request);
2124         if(exception.get() != null) {
2125             Throwable t = exception.get();
2126             if(t instanceof DatabaseException) throw (DatabaseException)t;
2127             else throw new DatabaseException(t);
2128         }
2129         return result.get();
2130     }
2131
2132     @Override
2133     public void syncRequest(DelayedWrite request) throws DatabaseException  {
2134         assertNotSession();
2135         Semaphore notify = new Semaphore(0);
2136         final DataContainer<DatabaseException> exception = new DataContainer<DatabaseException>();
2137         scheduleRequest(request, e -> exception.set(e), notify);
2138         acquire(notify, request);
2139         if(exception.get() != null) throw exception.get();
2140     }
2141
2142     @Override
2143     public void syncRequest(WriteOnly request) throws DatabaseException  {
2144         assertNotSession();
2145         assertAlive();
2146         Semaphore notify = new Semaphore(0);
2147         final DataContainer<DatabaseException> exception = new DataContainer<DatabaseException>();
2148         scheduleRequest(request, e -> exception.set(e), notify);
2149         acquire(notify, request);
2150         if(exception.get() != null) throw exception.get();
2151     }
2152
2153     /*
2154      *
2155      * GraphRequestProcessor interface
2156      */
2157
2158     @Override
2159     public <T> void asyncRequest(final AsyncRead<T> request, final AsyncProcedure<T> procedure) {
2160
2161         scheduleRequest(request, procedure, null, null);
2162
2163     }
2164
2165     @Override
2166     public <T> void asyncRequest(final AsyncMultiRead<T> request, final AsyncMultiProcedure<T> procedure) {
2167
2168         scheduleRequest(request, procedure, null);
2169
2170     }
2171
2172     @Override
2173     public <T> void asyncRequest(final ExternalRead<T> request, final Procedure<T> procedure) {
2174
2175         scheduleRequest(request, procedure, null, null, null);
2176
2177     }
2178
2179     @Override
2180     public void asyncRequest(final Write request, final Consumer<DatabaseException> callback) {
2181
2182         scheduleRequest(request, callback, null);
2183
2184     }
2185
2186     @Override
2187     public <T> void asyncRequest(final WriteResult<T> request, final Procedure<T> procedure) {
2188
2189         scheduleRequest(request, procedure, null);
2190
2191     }
2192
2193     @Override
2194     public <T> void asyncRequest(final WriteOnlyResult<T> request, final Procedure<T> procedure) {
2195
2196         scheduleRequest(request, procedure, null);
2197
2198     }
2199
2200     @Override
2201     public <T> void asyncRequest(final DelayedWriteResult<T> request, final Procedure<T> procedure) {
2202
2203         scheduleRequest(request, procedure, null);
2204
2205     }
2206
2207     @Override
2208     public void asyncRequest(final DelayedWrite request, final Consumer<DatabaseException> callback) {
2209
2210         scheduleRequest(request, callback, null);
2211
2212     }
2213
2214     @Override
2215     public void asyncRequest(final Write r) {
2216         asyncRequest(r, null);
2217     }
2218
2219     @Override
2220     public void asyncRequest(final DelayedWrite r) {
2221         asyncRequest(r, null);
2222     }
2223
2224     @Override
2225     public void asyncRequest(final WriteOnly request, final Consumer<DatabaseException> callback) {
2226
2227         scheduleRequest(request, callback, null);
2228
2229     }
2230
2231     @Override
2232     public void asyncRequest(final WriteOnly request) {
2233
2234         asyncRequest(request, null);
2235
2236     }
2237
2238     @Override
2239     public <T> void async(ReadInterface<T> r, AsyncProcedure<T> procedure) {
2240         r.request(this, procedure);
2241     }
2242
2243     @Override
2244     public <T> void async(ReadInterface<T> r, Procedure<T> procedure) {
2245         r.request(this, procedure);
2246     }
2247
2248     @Override
2249     public <T> void async(ReadInterface<T> r, SyncProcedure<T> procedure) {
2250         r.request(this, procedure);
2251     }
2252
2253     @Override
2254     public <T> void async(ReadInterface<T> r, AsyncListener<T> procedure) {
2255         r.request(this, procedure);
2256     }
2257
2258     @Override
2259     public <T> void async(ReadInterface<T> r, Listener<T> procedure) {
2260         r.request(this, procedure);
2261     }
2262
2263     @Override
2264     public <T> void async(ReadInterface<T> r, SyncListener<T> procedure) {
2265         r.request(this, procedure);
2266     }
2267
2268     @Override
2269     public <T> T sync(ReadInterface<T> r) throws DatabaseException {
2270         return r.request(this);
2271     }
2272
2273     @Override
2274     public <T> T sync(WriteInterface<T> r) throws DatabaseException {
2275         return r.request(this);
2276     }
2277
2278     @Override
2279     public <T> void async(WriteInterface<T> r, Procedure<T> procedure) {
2280         r.request(this, procedure);
2281     }
2282
2283     @Override
2284     public <T> void async(WriteInterface<T> r) {
2285         r.request(this, new ProcedureAdapter<T>());
2286     }
2287
2288     //@Override
2289     public void incAsync() {
2290         state.incAsync();
2291     }
2292
2293     //@Override
2294     public void decAsync() {
2295         state.decAsync();
2296     }
2297
2298     public long getCluster(ResourceImpl resource) {
2299         ClusterI cluster = clusterTable.getClusterByResourceKey(resource.id);
2300         return cluster.getClusterId();
2301     }
2302
2303     public long getCluster(int id) {
2304         if (clusterTable == null)
2305             System.out.println("SessionImplSocket.getCluster() clusterTable == null !!!!! how come");
2306         return clusterTable.getClusterIdByResourceKeyNoThrow(id);
2307     }
2308
2309     public ResourceImpl getResource(int id) {
2310         return new ResourceImpl(resourceSupport, id);
2311     }
2312
2313     public ResourceImpl getResource(int resourceIndex, long clusterId) {
2314         assert (!ClusterTraitsBase.isIllegalResourceIndex(resourceIndex));
2315         ClusterI proxy = clusterTable.getClusterByClusterId(clusterId);
2316         int key = proxy.getClusterKey();
2317         int resourceKey = ClusterTraitsBase.createResourceKeyNoThrow(key, resourceIndex);
2318         return new ResourceImpl(resourceSupport, resourceKey);
2319     }
2320
2321     public ResourceImpl getResource2(int id) {
2322         assert (id != 0);
2323         return new ResourceImpl(resourceSupport, id);
2324     }
2325
2326     final public int getId(ResourceImpl impl) {
2327         return impl.id;
2328     }
2329
2330     public static final Charset UTF8 = Charset.forName("utf-8");
2331
2332
2333
2334
2335     static boolean areVirtualStatementsLoaded(final VirtualGraphServerSupportImpl support, int subject) {
2336         for(TransientGraph g : support.providers) {
2337             if(g.isPending(subject)) return false;
2338         }
2339         return true;
2340     }
2341
2342     static boolean areVirtualStatementsLoaded(final VirtualGraphServerSupportImpl support, int subject, int predicate) {
2343         for(TransientGraph g : support.providers) {
2344             if(g.isPending(subject, predicate)) return false;
2345         }
2346         return true;
2347     }
2348
2349     static void loadVirtualStatements(final VirtualGraphServerSupportImpl support, ReadGraphImpl graph, int subject, final Consumer<ReadGraphImpl> runnable) {
2350
2351         Consumer<ReadGraphImpl> composite = new Consumer<ReadGraphImpl>() {
2352
2353             AtomicInteger ready = new AtomicInteger(support.providers.size() + 1);
2354
2355             @Override
2356             public void accept(ReadGraphImpl graph) {
2357                 if(ready.decrementAndGet() == 0) {
2358                     runnable.accept(graph);
2359                 }
2360             }
2361
2362         };
2363
2364         for(TransientGraph g : support.providers) {
2365             if(g.isPending(subject)) {
2366                 try {
2367                     g.load(graph, subject, composite);
2368                 } catch (DatabaseException e) {
2369                     e.printStackTrace();
2370                 }
2371             } else {
2372                 composite.accept(graph);
2373             }
2374         }
2375
2376         composite.accept(graph);
2377
2378     }
2379
2380     static  void loadVirtualStatements(final VirtualGraphServerSupportImpl support, ReadGraphImpl graph, int subject, int predicate, final Consumer<ReadGraphImpl> runnable) {
2381
2382         Consumer<ReadGraphImpl> composite = new Consumer<ReadGraphImpl>() {
2383
2384             AtomicInteger ready = new AtomicInteger(support.providers.size() + 1);
2385
2386             @Override
2387             public void accept(ReadGraphImpl graph) {
2388                 if(ready.decrementAndGet() == 0) {
2389                     runnable.accept(graph);
2390                 }
2391             }
2392
2393         };
2394
2395         for(TransientGraph g : support.providers) {
2396             if(g.isPending(subject, predicate)) {
2397                 try {
2398                     g.load(graph, subject, predicate, composite);
2399                 } catch (DatabaseException e) {
2400                     e.printStackTrace();
2401                 }
2402             } else {
2403                 composite.accept(graph);
2404             }
2405         }
2406
2407         composite.accept(graph);
2408
2409     }
2410
2411 //    void dumpHeap() {
2412 //
2413 //        try {
2414 //            ManagementFactory.newPlatformMXBeanProxy(ManagementFactory.getPlatformMBeanServer(),
2415 //                    "com.sun.management:type=HotSpotDiagnostic", HotSpotDiagnosticMXBean.class).dumpHeap(
2416 //                    "d:/heap" + flushCounter + ".txt", true);
2417 //        } catch (IOException e) {
2418 //            e.printStackTrace();
2419 //        }
2420 //
2421 //    }
2422
2423     void fireReactionsToSynchronize(ChangeSet cs) {
2424
2425         // Do not fire empty events
2426         if (cs.isEmpty())
2427             return;
2428
2429         ReadGraphImpl g = ReadGraphImpl.create(getQueryProvider2());
2430 //        g.state.barrier.inc();
2431
2432         try {
2433
2434             if (!cs.isEmpty()) {
2435                 ChangeEvent e2 = new ChangeEvent(g.getSession(), g, null, cs);
2436                 for (ChangeListener l : changeListeners2) {
2437                     try {
2438                         l.graphChanged(e2);
2439                     } catch (Exception ex) {
2440                         ex.printStackTrace();
2441                     }
2442                 }
2443             }
2444
2445         } finally {
2446
2447 //            g.state.barrier.dec();
2448 //            g.waitAsync(null);
2449
2450         }
2451
2452     }
2453
2454     void fireReactionsToCommit(ReadGraphImpl graph, ChangeSet cs2) {
2455         try {
2456
2457             // Do not fire empty events
2458             if (cs2.isEmpty())
2459                 return;
2460
2461 //            graph.restart();
2462 //            graph.state.barrier.inc();
2463
2464             try {
2465
2466                 if (!cs2.isEmpty()) {
2467
2468                     ChangeEvent e2 = new ChangeEvent(graph.getSession(), graph, null, cs2);
2469                     for (ChangeListener l : changeListeners2) {
2470                         try {
2471                             l.graphChanged(e2);
2472 //                            System.out.println("changelistener " + l);
2473                         } catch (Exception ex) {
2474                             ex.printStackTrace();
2475                         }
2476                     }
2477
2478                 }
2479
2480             } finally {
2481
2482 //                graph.state.barrier.dec();
2483 //                graph.waitAsync(null);
2484
2485             }
2486         } catch (Throwable t) {
2487             t.printStackTrace();
2488
2489         }
2490     }
2491     void fireMetadataListeners(WriteGraphImpl graph, ChangeSet cs2) {
2492
2493         try {
2494
2495             // Do not fire empty events
2496             if (cs2.isEmpty())
2497                 return;
2498
2499             // Do not fire on virtual requests
2500             if(graph.getProvider() != null)
2501                 return;
2502
2503             WriteGraphImpl reactionGraph = WriteGraphImpl.create(graph.processor, writeSupport, null);
2504
2505             try {
2506
2507                 ChangeEvent e2 = new ChangeEvent(graph.getSession(), reactionGraph, graph, cs2);
2508                 for (ChangeListener l : metadataListeners) {
2509                     try {
2510                         l.graphChanged(e2);
2511                     } catch (Throwable ex) {
2512                         ex.printStackTrace();
2513                     }
2514                 }
2515
2516             } finally {
2517
2518             }
2519
2520         } catch (Throwable t) {
2521             t.printStackTrace();
2522         }
2523
2524     }
2525
2526
2527     /*
2528      * (non-Javadoc)
2529      *
2530      * @see org.simantics.db.ServiceLocator#getService(java.lang.Class)
2531      */
2532     @Override
2533     public <T> T getService(Class<T> api) {
2534         T t = peekService(api);
2535         if (t == null) {
2536             if (state.isClosed())
2537                 throw new ServiceNotFoundException(this, api, "Session has been shut down");
2538             throw new ServiceNotFoundException(this, api);
2539         }
2540         return t;
2541     }
2542
2543     /**
2544      * @return
2545      */
2546     protected abstract ServerInformation getCachedServerInformation();
2547
2548         private Class<?> serviceKey1 = null;
2549         private Class<?> serviceKey2 = null;
2550         private Object service1 = null;
2551         private Object service2 = null;
2552
2553     /*
2554      * (non-Javadoc)
2555      *
2556      * @see
2557      * fi.vtt.simantics.db.connection.ServiceLocator#peekService(java.lang.Class)
2558      */
2559     @SuppressWarnings("unchecked")
2560     @Override
2561     public synchronized <T> T peekService(Class<T> api) {
2562
2563                 if(serviceKey1 == api) {
2564                         return (T)service1;
2565                 } else if (serviceKey2 == api) {
2566                         // Promote this key
2567                         Object result = service2;
2568                         service2 = service1;
2569                         serviceKey2 = serviceKey1;
2570                         service1 = result;
2571                         serviceKey1 = api;
2572                         return (T)result;
2573                 }
2574
2575         if (Layer0.class == api)
2576                 return (T) L0;
2577         if (ServerInformation.class == api)
2578             return (T) getCachedServerInformation();
2579         else if (WriteGraphImpl.class == api)
2580             return (T) writeState.getGraph();
2581         else if (ClusterBuilder.class == api)
2582             return (T)new ClusterBuilderImpl(this, (WriteOnlySupport)writeState.getGraph().writeSupport);
2583         else if (ClusterBuilderFactory.class == api)
2584             return (T)new ClusterBuilderFactoryImpl(this);
2585
2586                 service2 = service1;
2587                 serviceKey2 = serviceKey1;
2588
2589         service1 = serviceLocator.peekService(api);
2590         serviceKey1 = api;
2591
2592         return (T)service1;
2593
2594     }
2595
2596     /*
2597      * (non-Javadoc)
2598      *
2599      * @see
2600      * fi.vtt.simantics.db.connection.ServiceLocator#hasService(java.lang.Class)
2601      */
2602     @Override
2603     public boolean hasService(Class<?> api) {
2604         return serviceLocator.hasService(api);
2605     }
2606
2607     /**
2608      * @param api the api that must be implemented by the specified service
2609      * @param service the service implementation
2610      */
2611     @Override
2612     public <T> void registerService(Class<T> api, T service) {
2613         if(Layer0.class == api) {
2614                 L0 = (Layer0)service;
2615                 return;
2616         }
2617         serviceLocator.registerService(api, service);
2618         if (TransactionPolicySupport.class == api) {
2619             transactionPolicy = (TransactionPolicySupport)service;
2620             state.resetTransactionPolicy();
2621         }
2622         if (api == serviceKey1)
2623                 service1 = service;
2624         else if (api == serviceKey2)
2625                 service2 = service;
2626     }
2627
2628     // ----------------
2629     // SessionMonitor
2630     // ----------------
2631
2632     void fireSessionVariableChange(String variable) {
2633         for (MonitorHandler h : monitorHandlers) {
2634             MonitorContext ctx = monitorContexts.getLeft(h);
2635             assert ctx != null;
2636             // SafeRunner functionality repeated here to avoid dependency.
2637             try {
2638                 h.valuesChanged(ctx);
2639             } catch (Exception e) {
2640                 Logger.defaultLogError("monitor handler notification produced the following exception", e);
2641             } catch (LinkageError e) {
2642                 Logger.defaultLogError("monitor handler notification produced a linkage error", e);
2643             }
2644         }
2645     }
2646
2647
2648     class ResourceSerializerImpl implements ResourceSerializer {
2649
2650         public long createRandomAccessId(int id) throws DatabaseException {
2651             if(id < 0)
2652                 return id;
2653             int index = ClusterTraitsBase.getResourceIndexFromResourceKey(id);
2654             long cluster = getCluster(id);
2655             if (0 == cluster)
2656                 return 0; // Better to return 0 then invalid id.
2657             long result = ClusterTraitsBase.createResourceId(cluster, index);
2658             return result;
2659         }
2660
2661         @Override
2662         public long getRandomAccessId(Resource resource) throws DatabaseException {
2663
2664             ResourceImpl resourceImpl = (ResourceImpl) resource;
2665             return createRandomAccessId(resourceImpl.id);
2666
2667         }
2668
2669         @Override
2670         public int getTransientId(Resource resource) throws DatabaseException {
2671
2672             ResourceImpl resourceImpl = (ResourceImpl) resource;
2673             return resourceImpl.id;
2674
2675         }
2676
2677         @Override
2678         public String createRandomAccessId(Resource resource)
2679         throws InvalidResourceReferenceException {
2680
2681             if(resource == null) throw new IllegalArgumentException();
2682
2683             ResourceImpl resourceImpl = (ResourceImpl) resource;
2684
2685             if (resourceImpl.id < 0) return String.valueOf(resourceImpl.id) + "_0";
2686
2687             int r;
2688             try {
2689                 r = ClusterTraits.getResourceIndexFromResourceKey(resourceImpl.id);
2690             } catch (DatabaseException e1) {
2691                 throw new InvalidResourceReferenceException(e1);
2692             }
2693             try {
2694                 // Serialize as '<resource index>_<cluster id>'
2695                 return "" + r + "_" + getCluster(resourceImpl);
2696             } catch (Throwable e) {
2697                 e.printStackTrace();
2698                 throw new InvalidResourceReferenceException(e);
2699             } finally {
2700             }
2701         }
2702
2703         public int getTransientId(long serialized) throws DatabaseException {
2704             if (serialized <= 0)
2705                 return (int)serialized;
2706             int index = ClusterTraitsBase.getResourceIndexFromResourceId(serialized);
2707             long c = ClusterTraitsBase.getClusterIdFromResourceId(serialized);
2708             ClusterI cluster = clusterTranslator.getClusterByClusterId(c);
2709             if (cluster == null)
2710                 throw new DatabaseException("Couldn't load cluster for id " + c + " for resource id " + serialized);
2711             int key = ClusterTraits.createResourceKey(cluster.getClusterKey(), index);
2712             return key;
2713         }
2714
2715         @Override
2716         public Resource getResource(long randomAccessId) throws DatabaseException {
2717             return getResourceByKey(getTransientId(randomAccessId));
2718         }
2719
2720         @Override
2721         public Resource getResource(int transientId) throws DatabaseException {
2722             return getResourceByKey(transientId);
2723         }
2724
2725         @Override
2726         public Resource getResource(String randomAccessId)
2727         throws InvalidResourceReferenceException {
2728             try {
2729                 int i = randomAccessId.indexOf('_');
2730                 if (i == -1)
2731                     throw new InvalidResourceReferenceException("Could not parse resource id + cluster id from '"
2732                             + randomAccessId + "'");
2733                 int r = Integer.parseInt(randomAccessId.substring(0, i));
2734                 if(r < 0) return getResourceByKey(r);
2735                 long c = Long.parseLong(randomAccessId.substring(i + 1));
2736                 ClusterI cluster = clusterTranslator.getClusterByClusterId(c);
2737                 int key = ClusterTraits.createResourceKey(cluster.getClusterKey(), r);
2738                 if (cluster.hasResource(key, clusterTranslator))
2739                     return getResourceByKey(key);
2740             } catch (InvalidResourceReferenceException e) {
2741                 throw e;
2742             } catch (NumberFormatException e) {
2743                 throw new InvalidResourceReferenceException(e);
2744             } catch (Throwable e) {
2745                 e.printStackTrace();
2746                 throw new InvalidResourceReferenceException(e);
2747             } finally {
2748             }
2749             throw new InvalidResourceReferenceException("Resource does not exist " + randomAccessId);
2750         }
2751
2752         @Override
2753         public boolean disposeRandomAccessId(String randomAccessId) throws InvalidResourceReferenceException {
2754             try {
2755                 return true;
2756             } catch (Throwable e) {
2757                 e.printStackTrace();
2758                 throw new InvalidResourceReferenceException(e);
2759             } finally {
2760             }
2761         }
2762     }
2763
2764     // Copied from old SessionImpl
2765
2766     void check() {
2767         if (state.isClosed())
2768             throw new Error("Session closed.");
2769     }
2770
2771
2772
2773     public ResourceImpl getNewResource(long clusterId) {
2774         ClusterI cluster = clusterTable.getClusterByClusterIdOrThrow(clusterId);
2775         int newId;
2776         try {
2777             newId = cluster.createResource(clusterTranslator);
2778         } catch (DatabaseException e) {
2779             Logger.defaultLogError(e);
2780             return null;
2781         }
2782         return new ResourceImpl(resourceSupport, newId);
2783     }
2784
2785     public ResourceImpl getNewResource(Resource clusterSet)
2786     throws DatabaseException {
2787         long resourceId = clusterSet.getResourceId();
2788         Long clusterId = clusterSetsSupport.get(resourceId);
2789         if (null == clusterId)
2790             throw new ClusterSetExistException("Cluster set does not exist. Resource=" + clusterSet);
2791         if (Constants.NewClusterId == clusterId) {
2792             clusterId = getService(ClusteringSupport.class).createCluster();
2793             if ((serviceMode & SERVICE_MODE_CREATE) > 0)
2794                 createdClusters.add(clusterId);
2795             clusterSetsSupport.put(resourceId, clusterId);
2796             return getNewResource(clusterId);
2797         } else {
2798             ClusterBase cb = clusterTranslator.getClusterByClusterId(clusterId);
2799             ResourceImpl result;
2800             if (cb.getNumberOfResources(clusterTranslator) >= ClusterTable.CLUSTER_FILL_SIZE) {
2801                 clusterId = getService(ClusteringSupport.class).createCluster();
2802                 if ((serviceMode & SERVICE_MODE_CREATE) > 0)
2803                     createdClusters.add(clusterId);
2804                 clusterSetsSupport.put(resourceId, clusterId);
2805                 return getNewResource(clusterId);
2806             } else {
2807                 result = getNewResource(clusterId);
2808                 int resultKey = querySupport.getId(result);
2809                 long resultCluster = querySupport.getClusterId(resultKey);
2810                 if (clusterId != resultCluster)
2811                     clusterSetsSupport.put(resourceId, resultCluster);
2812                 return result;
2813             }
2814         }
2815     }
2816
2817     public void getNewClusterSet(Resource clusterSet)
2818     throws DatabaseException {
2819         if (DEBUG)
2820             System.out.println("new cluster set=" + clusterSet);
2821         long resourceId = clusterSet.getResourceId();
2822         if (clusterSetsSupport.containsKey(resourceId))
2823             throw new ClusterSetExistException("Cluster set exist already. Resource=" + clusterSet);
2824         clusterSetsSupport.put(resourceId, Constants.NewClusterId);
2825     }
2826     public boolean containsClusterSet(Resource clusterSet)
2827     throws ServiceException {
2828         long resourceId = clusterSet.getResourceId();
2829         return clusterSetsSupport.containsKey(resourceId);
2830     }
2831     public Resource setDefaultClusterSet4NewResource(Resource clusterSet) {
2832         Resource r = defaultClusterSet;
2833         defaultClusterSet = clusterSet;
2834         return r;
2835     }
2836     void printDiagnostics() {
2837
2838         if (DIAGNOSTICS) {
2839
2840             final DataContainer<Long> totalMem = new DataContainer<Long>(0L);
2841             final DataContainer<Long> residentClusters = new DataContainer<Long>(0L);
2842             for(ClusterI cluster : clusterTable.getClusters()) {
2843                 try {
2844                     if (cluster.isLoaded() && !cluster.isEmpty()) {
2845                         residentClusters.set(residentClusters.get() + 1);
2846                         totalMem.set(totalMem.get() + cluster.getUsedSpace());
2847                     }
2848                 } catch (DatabaseException e) {
2849                     Logger.defaultLogError(e);
2850                 }
2851             }
2852
2853             System.out.println("--------------------------------");
2854             System.out.println("Cluster information:");
2855             System.out.println("-amount of resident clusters=" + residentClusters.get());
2856             System.out.println("-total memory usage=" + totalMem.get() / 1024 + "kB");
2857
2858             for(ClusterI cluster : clusterTable.getClusters()) {
2859                 System.out.print("Cluster " + cluster.getClusterId() + " [");
2860                 try {
2861                     if (!cluster.isLoaded())
2862                         System.out.println("not loaded]");
2863                     else if (cluster.isEmpty())
2864                         System.out.println("is empty]");
2865                     else {
2866                         System.out.print("resources=" + cluster.getNumberOfResources(clusterTranslator));
2867                         System.out.print(",references=" + cluster.getReferenceCount());
2868                         System.out.println(",memory=" + cluster.getUsedSpace() / 1024 + "kB]");
2869                     }
2870                 } catch (DatabaseException e) {
2871                     Logger.defaultLogError(e);
2872                     System.out.println("is corrupted]");
2873                 }
2874             }
2875
2876             queryProvider2.printDiagnostics();
2877             System.out.println("--------------------------------");
2878         }
2879
2880     }
2881
2882     public void fireStartReadTransaction() {
2883
2884         if (DIAGNOSTICS)
2885             System.out.println("StartReadTransaction");
2886
2887         for (SessionEventListener listener : eventListeners) {
2888             try {
2889                 listener.readTransactionStarted();
2890             } catch (Throwable t) {
2891                 t.printStackTrace();
2892             }
2893         }
2894
2895     }
2896
2897     public void fireFinishReadTransaction() {
2898
2899         if (DIAGNOSTICS)
2900             System.out.println("FinishReadTransaction");
2901
2902         for (SessionEventListener listener : eventListeners) {
2903             try {
2904                 listener.readTransactionFinished();
2905             } catch (Throwable t) {
2906                 t.printStackTrace();
2907             }
2908         }
2909
2910     }
2911
2912     public void fireStartWriteTransaction() {
2913
2914         if (DIAGNOSTICS)
2915             System.out.println("StartWriteTransaction");
2916
2917         for (SessionEventListener listener : eventListeners) {
2918             try {
2919                 listener.writeTransactionStarted();
2920             } catch (Throwable t) {
2921                 t.printStackTrace();
2922             }
2923         }
2924
2925     }
2926
2927     public void fireFinishWriteTransaction() {
2928
2929         if (DIAGNOSTICS)
2930             System.out.println("FinishWriteTransaction");
2931
2932         for (SessionEventListener listener : eventListeners) {
2933             try {
2934                 listener.writeTransactionFinished();
2935             } catch (Throwable t) {
2936                 t.printStackTrace();
2937             }
2938         }
2939
2940         Indexing.resetDependenciesIndexingDisabled();
2941
2942     }
2943
2944     Resource deserialize(final long resourceId, final long clusterId) throws IOException {
2945         throw new Error("Not supported at the moment.");
2946     }
2947
2948     State getState() {
2949         return state;
2950     }
2951
2952     ClusterTable getClusterTable() {
2953         return clusterTable;
2954     }
2955
2956     public GraphSession getGraphSession() {
2957         return graphSession;
2958     }
2959
2960     public QueryProcessor getQueryProvider2() {
2961         return queryProvider2;
2962     }
2963
2964     ClientChangesImpl getClientChanges() {
2965         return clientChanges;
2966     }
2967
2968     boolean getWriteOnly() {
2969         return writeOnly;
2970     }
2971
2972     static int counter = 0;
2973
2974     public void onClusterLoaded(long clusterId) {
2975
2976         clusterTable.updateSize();
2977
2978     }
2979
2980
2981
2982
2983     /*
2984      * Implementation of the interface RequestProcessor
2985      */
2986
2987     @Override
2988     public <T> T syncRequest(final Read<T> request) throws DatabaseException {
2989
2990         assertNotSession();
2991         assertAlive();
2992
2993         assert(request != null);
2994
2995         final DataContainer<T> result = new DataContainer<T>();
2996         final DataContainer<Throwable> exception = new DataContainer<Throwable>();
2997
2998         syncRequest(request, new AsyncProcedure<T>() {
2999
3000             @Override
3001             public void execute(AsyncReadGraph graph, T t) {
3002                 result.set(t);
3003             }
3004
3005             @Override
3006             public void exception(AsyncReadGraph graph, Throwable t) {
3007                 exception.set(t);
3008             }
3009
3010         });
3011
3012         Throwable t = exception.get();
3013         if(t != null) {
3014             if(t instanceof DatabaseException) throw (DatabaseException)t;
3015             else throw new DatabaseException("Unexpected exception in ReadGraph.syncRequest(Read)", t);
3016         }
3017
3018         return result.get();
3019
3020     }
3021
3022 //    @Override
3023 //    public <T> T syncRequest(Read<T> request, AsyncListener<T> procedure) throws DatabaseException {
3024 //        assertNotSession();
3025 //        return syncRequest(request, (AsyncProcedure<T>)procedure);
3026 //    }
3027
3028     @Override
3029     public <T> T syncRequest(Read<T> request, SyncListener<T> procedure) throws DatabaseException {
3030         assertNotSession();
3031         return syncRequest(request, new SyncToAsyncListener<T>(procedure));
3032     }
3033
3034     @Override
3035     public <T> T syncRequest(Read<T> request, final Listener<T> procedure) throws DatabaseException {
3036         assertNotSession();
3037         return syncRequest(request, new NoneToAsyncListener<T>(procedure));
3038     }
3039
3040     @Override
3041     public <T> T syncRequest(final Read<T> request, final SyncProcedure<T> procedure) throws DatabaseException {
3042         assertNotSession();
3043         return syncRequest(request, new SyncToAsyncProcedure<T>(procedure));
3044     }
3045
3046     @Override
3047     public <T> T syncRequest(Read<T> request, Procedure<T> procedure) throws DatabaseException {
3048         assertNotSession();
3049         return syncRequest(request, new NoneToAsyncProcedure<T>(procedure));
3050     }
3051
3052     @Override
3053     public <T> T syncRequest(final AsyncRead<T> request) throws DatabaseException {
3054
3055         assertNotSession();
3056
3057         assert(request != null);
3058
3059         final DataContainer<T> result = new DataContainer<T>();
3060         final DataContainer<Throwable> exception = new DataContainer<Throwable>();
3061
3062         syncRequest(request, new AsyncProcedure<T>() {
3063
3064             @Override
3065             public void execute(AsyncReadGraph graph, T t) {
3066                 result.set(t);
3067             }
3068
3069             @Override
3070             public void exception(AsyncReadGraph graph, Throwable t) {
3071                 exception.set(t);
3072             }
3073
3074         });
3075
3076         Throwable t = exception.get();
3077         if(t != null) {
3078             if(t instanceof DatabaseException) throw (DatabaseException)t;
3079             else throw new DatabaseException("Unexpected exception in ReadGraph.syncRequest(Read)", t);
3080         }
3081
3082         return result.get();
3083
3084     }
3085
3086     @Override
3087     public <T> T syncRequest(AsyncRead<T> request, AsyncListener<T> procedure) throws DatabaseException {
3088         assertNotSession();
3089         return syncRequest(request, (AsyncProcedure<T>)procedure);
3090     }
3091
3092     @Override
3093     public <T> T syncRequest(AsyncRead<T> request, SyncListener<T> procedure) throws DatabaseException {
3094         assertNotSession();
3095         return syncRequest(request, new SyncToAsyncListener<T>(procedure));
3096     }
3097
3098     @Override
3099     public <T> T syncRequest(AsyncRead<T> request, Listener<T> procedure) throws DatabaseException {
3100         assertNotSession();
3101         return syncRequest(request, new NoneToAsyncListener<T>(procedure));
3102     }
3103
3104     @Override
3105     public <T> T syncRequest(AsyncRead<T> request, final SyncProcedure<T> procedure) throws DatabaseException {
3106         assertNotSession();
3107         return syncRequest(request, new SyncToAsyncProcedure<T>(procedure));
3108     }
3109
3110     @Override
3111     final public <T> T syncRequest(final AsyncRead<T> request, final Procedure<T> procedure) throws DatabaseException {
3112         assertNotSession();
3113         return syncRequest(request, new NoneToAsyncProcedure<T>(procedure));
3114     }
3115
3116     @Override
3117     public <T> Collection<T> syncRequest(MultiRead<T> request) throws DatabaseException {
3118
3119         assertNotSession();
3120
3121         assert(request != null);
3122
3123         final ArrayList<T> result = new ArrayList<T>();
3124         final DataContainer<Throwable> exception = new DataContainer<Throwable>();
3125
3126         syncRequest(request, new SyncMultiProcedure<T>() {
3127
3128             @Override
3129             public void execute(ReadGraph graph, T t) {
3130                 synchronized(result) {
3131                     result.add(t);
3132                 }
3133             }
3134
3135             @Override
3136             public void finished(ReadGraph graph) {
3137             }
3138
3139             @Override
3140             public void exception(ReadGraph graph, Throwable t) {
3141                 exception.set(t);
3142             }
3143
3144
3145         });
3146
3147         Throwable t = exception.get();
3148         if(t != null) {
3149             if(t instanceof DatabaseException) throw (DatabaseException)t;
3150             else throw new DatabaseException("Unexpected exception in ReadGraph.syncRequest(Read)", t);
3151         }
3152
3153         return result;
3154
3155     }
3156
3157     @Override
3158     public <T> Collection<T> syncRequest(MultiRead<T> arg0, SyncMultiProcedure<T> arg1) throws DatabaseException {
3159         assertNotSession();
3160         throw new Error("Not implemented!");
3161     }
3162
3163     @Override
3164     public <T> Collection<T> syncRequest(MultiRead<T> request, SyncMultiListener<T> procedure) throws DatabaseException {
3165         assertNotSession();
3166         return syncRequest(request, (SyncMultiProcedure<T>)procedure);
3167     }
3168
3169     @Override
3170     public <T> Collection<T> syncRequest(MultiRead<T> request, MultiListener<T> procedure) throws DatabaseException {
3171         assertNotSession();
3172         return syncRequest(request, new NoneToSyncMultiListener<T>(procedure));
3173     }
3174
3175     @Override
3176     public <T> Collection<T> syncRequest(MultiRead<T> request, MultiProcedure<T> procedure) throws DatabaseException {
3177         assertNotSession();
3178         return syncRequest(request, new NoneToSyncMultiProcedure<T>(procedure));
3179     }
3180
3181     @Override
3182     final public <T> Collection<T> syncRequest(final AsyncMultiRead<T> request) throws DatabaseException {
3183
3184         assertNotSession();
3185
3186         assert(request != null);
3187
3188         final ArrayList<T> result = new ArrayList<T>();
3189         final DataContainer<Throwable> exception = new DataContainer<Throwable>();
3190
3191         syncRequest(request, new AsyncMultiProcedure<T>() {
3192
3193             @Override
3194             public void execute(AsyncReadGraph graph, T t) {
3195                 synchronized(result) {
3196                     result.add(t);
3197                 }
3198             }
3199
3200             @Override
3201             public void finished(AsyncReadGraph graph) {
3202             }
3203
3204             @Override
3205             public void exception(AsyncReadGraph graph, Throwable t) {
3206                 exception.set(t);
3207             }
3208
3209
3210         });
3211
3212         Throwable t = exception.get();
3213         if(t != null) {
3214             if(t instanceof DatabaseException) throw (DatabaseException)t;
3215             else throw new DatabaseException("Unexpected exception in ReadGraph.syncRequest(Read)", t);
3216         }
3217
3218         return result;
3219
3220     }
3221
3222     @Override
3223     public <T> Collection<T> syncRequest(AsyncMultiRead<T> request, AsyncMultiListener<T> procedure) throws DatabaseException {
3224         assertNotSession();
3225         return syncRequest(request, (AsyncMultiProcedure<T>)procedure);
3226     }
3227
3228     @Override
3229     public <T> Collection<T> syncRequest(AsyncMultiRead<T> request, SyncMultiListener<T> procedure) throws DatabaseException {
3230         assertNotSession();
3231         return syncRequest(request, new SyncToAsyncMultiListener<T>(procedure));
3232     }
3233
3234     @Override
3235     public <T> Collection<T> syncRequest(AsyncMultiRead<T> request, MultiListener<T> procedure) throws DatabaseException {
3236         assertNotSession();
3237        return syncRequest(request, new NoneToAsyncMultiListener<T>(procedure));
3238     }
3239
3240     @Override
3241     public <T> Collection<T> syncRequest(AsyncMultiRead<T> request, final SyncMultiProcedure<T> procedure) throws DatabaseException {
3242         assertNotSession();
3243         return syncRequest(request, new SyncToAsyncMultiProcedure<T>(procedure));
3244     }
3245
3246     @Override
3247     final public <T> Collection<T> syncRequest(final AsyncMultiRead<T> request, final MultiProcedure<T> procedure) throws DatabaseException {
3248         assertNotSession();
3249         return syncRequest(request, new NoneToAsyncMultiProcedure<T>(procedure));
3250     }
3251
3252
3253     @Override
3254     public <T> void asyncRequest(Read<T> request) {
3255
3256         asyncRequest(request, new ProcedureAdapter<T>() {
3257             @Override
3258             public void exception(Throwable t) {
3259                 t.printStackTrace();
3260             }
3261         });
3262
3263     }
3264
3265     @Override
3266     public <T> void asyncRequest(Read<T> request, AsyncListener<T> procedure) {
3267         asyncRequest(request, (AsyncProcedure<T>)procedure);
3268     }
3269
3270     @Override
3271     public <T> void asyncRequest(Read<T> request, final SyncListener<T> procedure) {
3272         asyncRequest(request, new SyncToAsyncListener<T>(procedure));
3273     }
3274
3275     @Override
3276     public <T> void asyncRequest(Read<T> request, final Listener<T> procedure) {
3277         asyncRequest(request, new NoneToAsyncListener<T>(procedure));
3278     }
3279
3280     @Override
3281     public <T> void asyncRequest(Read<T> request, SyncProcedure<T> procedure) {
3282         asyncRequest(request, new SyncToAsyncProcedure<T>(procedure));
3283     }
3284
3285     @Override
3286     public <T> void asyncRequest(Read<T> request, final Procedure<T> procedure) {
3287         asyncRequest(request, new NoneToAsyncProcedure<T>(procedure));
3288     }
3289
3290     @Override
3291     final public <T> void asyncRequest(final AsyncRead<T> request) {
3292
3293         assert(request != null);
3294
3295         asyncRequest(request, new ProcedureAdapter<T>() {
3296             @Override
3297             public void exception(Throwable t) {
3298                 t.printStackTrace();
3299             }
3300         });
3301
3302     }
3303
3304     @Override
3305     public <T> void asyncRequest(AsyncRead<T> request, AsyncListener<T> procedure) {
3306         scheduleRequest(request, procedure, procedure, null);
3307     }
3308
3309     @Override
3310     public <T> void asyncRequest(AsyncRead<T> request, final SyncListener<T> procedure) {
3311         asyncRequest(request, new SyncToAsyncListener<T>(procedure));
3312     }
3313
3314     @Override
3315     public <T> void asyncRequest(AsyncRead<T> request, final Listener<T> procedure) {
3316         asyncRequest(request, new NoneToAsyncListener<T>(procedure));
3317     }
3318
3319     @Override
3320     public <T> void asyncRequest(AsyncRead<T> request, SyncProcedure<T> procedure) {
3321         asyncRequest(request, new SyncToAsyncProcedure<T>(procedure));
3322     }
3323
3324     @Override
3325     final public <T> void asyncRequest(final AsyncRead<T> request, final Procedure<T> procedure) {
3326         asyncRequest(request, new NoneToAsyncProcedure<T>(procedure));
3327     }
3328
3329     @Override
3330     public <T> void asyncRequest(MultiRead<T> request) {
3331
3332         assert(request != null);
3333
3334         asyncRequest(request, new SyncMultiProcedureAdapter<T>() {
3335             @Override
3336             public void exception(ReadGraph graph, Throwable t) {
3337                 t.printStackTrace();
3338             }
3339         });
3340
3341     }
3342
3343     @Override
3344     public <T> void asyncRequest(MultiRead<T> request, SyncMultiListener<T> procedure) {
3345         asyncRequest(request, (SyncMultiProcedure<T>)procedure);
3346     }
3347
3348     @Override
3349     public <T> void asyncRequest(MultiRead<T> request, MultiListener<T> procedure) {
3350         asyncRequest(request, new NoneToSyncMultiListener<T>(procedure));
3351     }
3352
3353     @Override
3354     public <T> void asyncRequest(MultiRead<T> request, SyncMultiProcedure<T> procedure) {
3355         scheduleRequest(request, procedure, null);
3356     }
3357
3358     @Override
3359     public <T> void asyncRequest(MultiRead<T> request, MultiProcedure<T> procedure) {
3360         asyncRequest(request, new NoneToSyncMultiProcedure<T>(procedure));
3361     }
3362
3363     @Override
3364     final public <T> void asyncRequest(AsyncMultiRead<T> request) {
3365
3366         assert(request != null);
3367
3368         asyncRequest(request, new AsyncMultiProcedureAdapter<T>() {
3369             @Override
3370             public void exception(AsyncReadGraph graph, Throwable t) {
3371                 t.printStackTrace();
3372             }
3373         });
3374
3375     }
3376
3377     @Override
3378     public <T> void asyncRequest(AsyncMultiRead<T> request, AsyncMultiListener<T> procedure) {
3379         asyncRequest(request, (AsyncMultiProcedure<T>)procedure);
3380     }
3381
3382     @Override
3383     public <T> void asyncRequest(AsyncMultiRead<T> request, SyncMultiListener<T> procedure) {
3384         asyncRequest(request, new SyncToAsyncMultiListener<T>(procedure));
3385     }
3386
3387     @Override
3388     public <T> void asyncRequest(AsyncMultiRead<T> request, MultiListener<T> procedure) {
3389         asyncRequest(request, new NoneToAsyncMultiListener<T>(procedure));
3390     }
3391
3392     @Override
3393     public <T> void asyncRequest(AsyncMultiRead<T> request, SyncMultiProcedure<T> procedure) {
3394         asyncRequest(request, new SyncToAsyncMultiProcedure<T>(procedure));
3395     }
3396
3397     @Override
3398     final public <T> void asyncRequest(AsyncMultiRead<T> request, final MultiProcedure<T> procedure) {
3399         asyncRequest(request, new NoneToAsyncMultiProcedure<T>(procedure));
3400     }
3401
3402     @Override
3403     final public <T> void asyncRequest(final ExternalRead<T> request) {
3404
3405         assert(request != null);
3406
3407         asyncRequest(request, new ProcedureAdapter<T>() {
3408             @Override
3409             public void exception(Throwable t) {
3410                 t.printStackTrace();
3411             }
3412         });
3413
3414     }
3415
3416     @Override
3417     public <T> void asyncRequest(ExternalRead<T> request, final Listener<T> procedure) {
3418         asyncRequest(request, (Procedure<T>)procedure);
3419     }
3420
3421
3422
3423     void check(Throwable t) throws DatabaseException {
3424         if(t != null) {
3425             if(t instanceof DatabaseException) throw (DatabaseException)t;
3426             else throw new DatabaseException("Unexpected exception", t);
3427         }
3428     }
3429
3430     void check(DataContainer<Throwable> container) throws DatabaseException {
3431         Throwable t = container.get();
3432         if(t != null) {
3433             if(t instanceof DatabaseException) throw (DatabaseException)t;
3434             else throw new DatabaseException("Unexpected exception", t);
3435         }
3436     }
3437
3438
3439
3440
3441
3442
3443     boolean sameProvider(Write request) {
3444         if(writeState.getGraph().provider != null) {
3445             return writeState.getGraph().provider.equals(request.getProvider());
3446         } else {
3447             return request.getProvider() == null;
3448         }
3449     }
3450
3451     boolean plainWrite(WriteGraphImpl graph) {
3452         if(graph == null) return false;
3453         if(graph.writeSupport.writeOnly()) return false;
3454         return true;
3455     }
3456
3457
3458     public static final ThreadGroup SessionThreadGroup = new ThreadGroup("Session Thread Group");
3459     private void assertNotSession() throws DatabaseException {
3460         Thread current = Thread.currentThread();
3461         if(sessionThreads.contains(current)) throw new DatabaseException("Caller is already inside a transaction.");
3462     }
3463
3464     void assertAlive() {
3465         if (!state.isAlive())
3466             throw new RuntimeDatabaseException("Session has been shut down.");
3467     }
3468
3469     public InputStream getValueStream(ReadGraphImpl graph, Resource resource) {
3470         return querySupport.getValueStream(graph, querySupport.getId(resource));
3471     }
3472
3473     public byte[] getValue(ReadGraphImpl graph, Resource resource) {
3474         return querySupport.getValue(graph, querySupport.getId(resource));
3475     }
3476
3477     <T> void acquire(Semaphore semaphore, T request) throws DatabaseException {
3478         acquire(semaphore, request, null);
3479     }
3480
3481     private <T,P> void acquire(Semaphore semaphore, T request, P procedure) throws DatabaseException {
3482         assertAlive();
3483         try {
3484             long tryCount = 0;
3485             // Loop until the semaphore is acquired reporting requests that take a long time.
3486             while (true) {
3487
3488                 if (semaphore.tryAcquire(DebugPolicy.LONG_EXECUTION_REPORT_PERIOD, DebugPolicy.LONG_EXECUTION_REPORT_PERIOD_UNIT)) {
3489                     // Acquired OK.
3490                     return;
3491                 } else {
3492                     if (DebugPolicy.REPORT_TIME_CONSUMING_REQUESTS) {
3493                         ++tryCount;
3494                         long waitTime = DebugPolicy.LONG_EXECUTION_REPORT_PERIOD_UNIT
3495                                 .toMillis(DebugPolicy.LONG_EXECUTION_REPORT_PERIOD)
3496                                 * tryCount;
3497                         System.err.println("DB client request '" + request + "' is taking long to execute, so far "
3498                                 + (waitTime) + " ms. (procedure=" + procedure + ")");
3499                     }
3500                 }
3501
3502                 assertAlive();
3503
3504             }
3505         } catch (InterruptedException e) {
3506             e.printStackTrace();
3507             // FIXME: Should perhaps do something else in this case ??
3508         }
3509     }
3510
3511
3512
3513 //    @Override
3514 //    public boolean holdOnToTransactionAfterCancel() {
3515 //        return transactionPolicy.holdOnToTransactionAfterCancel();
3516 //    }
3517 //
3518 //    @Override
3519 //    public boolean holdOnToTransactionAfterCommit() {
3520 //        return transactionPolicy.holdOnToTransactionAfterCommit();
3521 //    }
3522 //
3523 //    @Override
3524 //    public boolean holdOnToTransactionAfterRead() {
3525 //        return transactionPolicy.holdOnToTransactionAfterRead();
3526 //    }
3527 //
3528 //    @Override
3529 //    public void onRelinquish() {
3530 //        transactionPolicy.onRelinquish();
3531 //    }
3532 //
3533 //    @Override
3534 //    public void onRelinquishDone() {
3535 //        transactionPolicy.onRelinquishDone();
3536 //    }
3537 //
3538 //    @Override
3539 //    public void onRelinquishError() {
3540 //        transactionPolicy.onRelinquishError();
3541 //    }
3542
3543
3544     @Override
3545     public Session getSession() {
3546         return this;
3547     }
3548
3549
3550     protected abstract VirtualGraph getProvider(VirtualGraph virtualGraph);
3551     protected abstract ResourceImpl getNewResource() throws DatabaseException;
3552
3553     public void ceased(int thread) {
3554
3555         requestManager.ceased(thread);
3556
3557     }
3558
3559     public int getAmountOfQueryThreads() {
3560         // This must be a power of two
3561         return 1;
3562 //        return Integer.highestOneBit(Runtime.getRuntime().availableProcessors());
3563     }
3564
3565     public Resource getResourceByKey(int key) throws ResourceNotFoundException {
3566
3567         return new ResourceImpl(resourceSupport, key);
3568
3569     }
3570
3571     public void acquireWriteOnly() {
3572         writeOnly = true;
3573     }
3574
3575     public void releaseWriteOnly(ReadGraphImpl graph) {
3576         writeOnly = false;
3577         queryProvider2.releaseWrite(graph);
3578     }
3579
3580     public void handleUpdatesAndMetadata(WriteGraphImpl writer) {
3581
3582         long start = System.nanoTime();
3583
3584         while(dirtyPrimitives) {
3585             dirtyPrimitives = false;
3586             getQueryProvider2().performDirtyUpdates(writer);
3587             getQueryProvider2().performScheduledUpdates(writer);
3588         }
3589
3590         fireMetadataListeners(writer, clientChanges);
3591
3592         if(DebugPolicy.PERFORMANCE_DATA) {
3593             long end = System.nanoTime();
3594             System.err.println("handleUpdatesAndMetadata " + 1e-9*(end-start));
3595         }
3596
3597     }
3598
3599     void removeTemporaryData() {
3600         File platform = Platform.getLocation().toFile();
3601         File tempFiles = new File(platform, "tempFiles");
3602         File temp = new File(tempFiles, "db");
3603         if(!temp.exists())
3604             return;
3605         try {
3606             Files.walkFileTree(temp.toPath(), new SimpleFileVisitor<Path>() {
3607                 @Override
3608                 public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) {
3609                     try {
3610                         Files.delete(file);
3611                     } catch (IOException e) {
3612                         Logger.defaultLogError(e);
3613                     }
3614                     return FileVisitResult.CONTINUE;
3615                 }
3616             });
3617         } catch (IOException e) {
3618             Logger.defaultLogError(e);
3619         }
3620     }
3621
3622     public void handleCreatedClusters() {
3623         if ((serviceMode & SERVICE_MODE_CREATE) > 0) {
3624             createdClusters.forEach(new TLongProcedure() {
3625
3626                 @Override
3627                 public boolean execute(long value) {
3628                     ClusterImpl cluster = clusterTable.getClusterByClusterId(value);
3629                     cluster.setImmutable(true, clusterTranslator);
3630                     return true;
3631                 }
3632             });
3633         }
3634         createdClusters.clear();
3635     }
3636
3637     @Override
3638     public Object getModificationCounter() {
3639         return queryProvider2.modificationCounter;
3640     }
3641
3642     @Override
3643     public void markUndoPoint() {
3644         state.setCombine(false);
3645     }
3646
3647 }