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 (Throwable t) {
1658
1659                                 wrap.exception(newGraph, t);
1660
1661 //                            wrapper.exception(newGraph, t);
1662 //                            newGraph.waitAsync(request);
1663
1664
1665                         }
1666
1667                     }
1668
1669                 } finally {
1670
1671                     fireSessionVariableChange(SessionVariables.QUEUED_READS);
1672
1673                 }
1674
1675             }
1676
1677         });
1678
1679     }
1680
1681     public <T> void scheduleRequest(final MultiRead<T> request, final SyncMultiProcedure<T> procedure, final Semaphore notify) {
1682
1683         assert (request != null);
1684         assert (procedure != null);
1685
1686         int thread = request.hashCode() & queryProvider2.THREAD_MASK;
1687
1688         int sync = notify != null ? thread : -1;
1689
1690         requestManager.scheduleRead(new SessionRead(null, notify) {
1691
1692             @Override
1693             public void run(int thread) {
1694
1695                 fireSessionVariableChange(SessionVariables.QUEUED_READS);
1696
1697                 ListenerBase listener = getListenerBase(procedure);
1698
1699                 final ReadGraphImpl newGraph = ReadGraphImpl.create(getQueryProvider2());
1700
1701                 try {
1702
1703                     if (listener != null) {
1704
1705                         newGraph.processor.query(newGraph, request, null, procedure, listener);
1706
1707 //                        newGraph.waitAsync(request);
1708
1709                     } else {
1710
1711                         final ResultCallWrappedSyncQueryProcedure<T> wrapper = new ResultCallWrappedSyncQueryProcedure<T>(procedure);
1712
1713                         try {
1714
1715                             request.perform(newGraph, wrapper);
1716
1717                         } catch (Throwable t) {
1718
1719                             t.printStackTrace();
1720
1721                         }
1722
1723                     }
1724
1725                 } finally {
1726
1727                     fireSessionVariableChange(SessionVariables.QUEUED_READS);
1728
1729                 }
1730
1731             }
1732
1733         });
1734
1735     }
1736
1737     public <T> void scheduleRequest(final AsyncMultiRead<T> request, final AsyncMultiProcedure<T> procedure, final Semaphore notify) {
1738
1739         assert (request != null);
1740         assert (procedure != null);
1741
1742         int thread = request.hashCode() & queryProvider2.THREAD_MASK;
1743
1744         int sync = notify != null ? thread : -1;
1745
1746         requestManager.scheduleRead(new SessionRead(null, notify) {
1747
1748             @Override
1749             public void run(int thread) {
1750
1751                 fireSessionVariableChange(SessionVariables.QUEUED_READS);
1752
1753                 ListenerBase listener = getListenerBase(procedure);
1754
1755                 final ReadGraphImpl newGraph = ReadGraphImpl.create(getQueryProvider2());
1756
1757                 try {
1758
1759                     if (listener != null) {
1760
1761                         newGraph.processor.query(newGraph, request, null, procedure, listener);
1762
1763 //                        newGraph.waitAsync(request);
1764
1765                     } else {
1766
1767                         final ResultCallWrappedQueryProcedure4<T> wrapper = new ResultCallWrappedQueryProcedure4<T>(procedure);
1768
1769                         try {
1770
1771                             request.perform(newGraph, wrapper);
1772
1773                         } catch (Throwable t) {
1774
1775                             t.printStackTrace();
1776
1777                         }
1778
1779                     }
1780
1781                 } finally {
1782
1783                     fireSessionVariableChange(SessionVariables.QUEUED_READS);
1784
1785                 }
1786
1787             }
1788
1789         });
1790
1791     }
1792
1793     public <T> void scheduleRequest(final ExternalRead<T> request, final Procedure<T> procedure, final Semaphore notify, final DataContainer<Throwable> throwable, final DataContainer<T> result) {
1794
1795         assert (request != null);
1796         assert (procedure != null);
1797
1798         int thread = request.hashCode() & queryProvider2.THREAD_MASK;
1799
1800         requestManager.scheduleRead(new SessionRead(throwable, notify) {
1801
1802             @Override
1803             public void run(int thread) {
1804
1805                 fireSessionVariableChange(SessionVariables.QUEUED_READS);
1806
1807                 ListenerBase listener = getListenerBase(procedure);
1808
1809                 final ReadGraphImpl newGraph = ReadGraphImpl.create(getQueryProvider2());
1810
1811                 try {
1812
1813                     if (listener != null) {
1814
1815                         try {
1816                             QueryCacheBase.resultExternalReadEntry(newGraph, request, null, listener, procedure);
1817                         } catch (DatabaseException e) {
1818                             Logger.defaultLogError(e);
1819                         }
1820
1821
1822 //                        newGraph.processor.query(newGraph, request, null, new Procedure<T>() {
1823 //
1824 //                            @Override
1825 //                            public void exception(Throwable t) {
1826 //                                procedure.exception(t);
1827 //                                if(throwable != null) {
1828 //                                    throwable.set(t);
1829 //                                }
1830 //                            }
1831 //
1832 //                            @Override
1833 //                            public void execute(T t) {
1834 //                                if(result != null) result.set(t);
1835 //                                procedure.execute(t);
1836 //                            }
1837 //
1838 //                        }, listener);
1839
1840 //                        newGraph.waitAsync(request);
1841
1842                     } else {
1843
1844 //                        newGraph.state.barrier.inc();
1845
1846                         request.register(newGraph, new Listener<T>() {
1847
1848                             @Override
1849                             public void exception(Throwable t) {
1850                                 if(throwable != null) throwable.set(t);
1851                                 procedure.exception(t);
1852 //                                newGraph.state.barrier.dec();
1853                             }
1854
1855                             @Override
1856                             public void execute(T t) {
1857                                 if(result != null) result.set(t);
1858                                 procedure.execute(t);
1859 //                                newGraph.state.barrier.dec();
1860                             }
1861
1862                             @Override
1863                             public boolean isDisposed() {
1864                                 return true;
1865                             }
1866
1867                         });
1868
1869 //                        newGraph.waitAsync(request);
1870
1871                     }
1872
1873                 } finally {
1874
1875                     fireSessionVariableChange(SessionVariables.QUEUED_READS);
1876
1877                 }
1878
1879             }
1880
1881         });
1882
1883     }
1884
1885
1886     @Override
1887     public <T> void asyncRequest(final Read<T> request, final AsyncProcedure<T> procedure) {
1888
1889         scheduleRequest(request, procedure, null, null, null);
1890
1891     }
1892
1893     @Override
1894     public <T> T syncRequest(Read<T> request, AsyncProcedure<T> procedure) throws DatabaseException {
1895         assertNotSession();
1896         Semaphore notify = new Semaphore(0);
1897         DataContainer<Throwable> container = new DataContainer<Throwable>();
1898         DataContainer<T> result = new DataContainer<T>();
1899         scheduleRequest(request, procedure, notify, container, result);
1900         acquire(notify, request);
1901         Throwable throwable = container.get();
1902         if(throwable != null) {
1903             if(throwable instanceof DatabaseException) throw (DatabaseException)throwable;
1904             else throw new DatabaseException("Unexpected exception", throwable);
1905         }
1906         return result.get();
1907     }
1908
1909     @Override
1910     public <T> T syncRequest(AsyncRead<T> request, final AsyncProcedure<T> procedure) throws DatabaseException {
1911         assertNotSession();
1912         Semaphore notify = new Semaphore(0);
1913         final DataContainer<Throwable> exceptionContainer = new DataContainer<Throwable>();
1914         final DataContainer<T> resultContainer = new DataContainer<T>();
1915         scheduleRequest(request, new AsyncProcedure<T>() {
1916             @Override
1917             public void exception(AsyncReadGraph graph, Throwable throwable) {
1918                 exceptionContainer.set(throwable);
1919                 procedure.exception(graph, throwable);
1920             }
1921             @Override
1922             public void execute(AsyncReadGraph graph, T result) {
1923                 resultContainer.set(result);
1924                 procedure.execute(graph, result);
1925             }
1926         }, getListenerBase(procedure), notify);
1927         acquire(notify, request, procedure);
1928         Throwable throwable = exceptionContainer.get();
1929         if (throwable != null) {
1930             if(throwable instanceof DatabaseException) throw (DatabaseException)throwable;
1931             else throw new DatabaseException("Unexpected exception", throwable);
1932         }
1933         return resultContainer.get();
1934     }
1935
1936
1937     @Override
1938     public <T> Collection<T> syncRequest(AsyncMultiRead<T> request, final AsyncMultiProcedure<T> procedure) throws DatabaseException {
1939         assertNotSession();
1940         Semaphore notify = new Semaphore(0);
1941         final DataContainer<Throwable> exceptionContainer = new DataContainer<Throwable>();
1942         scheduleRequest(request, new AsyncMultiProcedure<T>() {
1943             @Override
1944             public void exception(AsyncReadGraph graph, Throwable throwable) {
1945                 exceptionContainer.set(throwable);
1946                 procedure.exception(graph, throwable);
1947             }
1948             @Override
1949             public void execute(AsyncReadGraph graph, T result) {
1950                 procedure.execute(graph, result);
1951             }
1952             @Override
1953             public void finished(AsyncReadGraph graph) {
1954                 procedure.finished(graph);
1955             }
1956         }, notify);
1957         acquire(notify, request, procedure);
1958         Throwable throwable = exceptionContainer.get();
1959         if (throwable != null) {
1960             if(throwable instanceof DatabaseException) throw (DatabaseException)throwable;
1961             else throw new DatabaseException("Unexpected exception", throwable);
1962         }
1963         // TODO: implement return value
1964         System.err.println("TODO: implement return value for syncRequest(AsyncMultiRead, AsyncMultiProcedure)");
1965         return null;
1966     }
1967
1968     @Override
1969     public <T> T syncRequest(final ExternalRead<T> request) throws DatabaseException {
1970         return syncRequest(request, new ProcedureAdapter<T>());
1971
1972
1973 //        assert(request != null);
1974 //
1975 //        final DataContainer<T> result = new DataContainer<T>();
1976 //        final DataContainer<Throwable> exception = new DataContainer<Throwable>();
1977 //
1978 //        syncRequest(request, new Procedure<T>() {
1979 //
1980 //            @Override
1981 //            public void execute(T t) {
1982 //                result.set(t);
1983 //            }
1984 //
1985 //            @Override
1986 //            public void exception(Throwable t) {
1987 //                exception.set(t);
1988 //            }
1989 //
1990 //        });
1991 //
1992 //        Throwable t = exception.get();
1993 //        if(t != null) {
1994 //            if(t instanceof DatabaseException) throw (DatabaseException)t;
1995 //            else throw new DatabaseException("Unexpected exception in ReadGraph.syncRequest(PrimitiveRead)", t);
1996 //        }
1997 //
1998 //        return result.get();
1999
2000     }
2001
2002     @Override
2003     public <T> T syncRequest(ExternalRead<T> request, final Listener<T> procedure) throws DatabaseException {
2004         return syncRequest(request, (Procedure<T>)procedure);
2005     }
2006
2007
2008 //    @Override
2009 //    public <T> T syncRequest(Read<T> request, AsyncProcedure<T> procedure) throws DatabaseException {
2010 //        assertNotSession();
2011 //        Semaphore notify = new Semaphore(0);
2012 //        DataContainer<Throwable> container = new DataContainer<Throwable>();
2013 //        DataContainer<T> result = new DataContainer<T>();
2014 //        scheduleRequest(request, procedure, notify, container, result);
2015 //        acquire(notify, request);
2016 //        Throwable throwable = container.get();
2017 //        if(throwable != null) {
2018 //            if(throwable instanceof DatabaseException) throw (DatabaseException)throwable;
2019 //            else throw new DatabaseException("Unexpected exception", throwable);
2020 //        }
2021 //        return result.get();
2022 //    }
2023
2024
2025     @Override
2026     public <T> T syncRequest(ExternalRead<T> request, final Procedure<T> procedure) throws DatabaseException {
2027         assertNotSession();
2028         Semaphore notify = new Semaphore(0);
2029         final DataContainer<Throwable> container = new DataContainer<Throwable>();
2030         final DataContainer<T> result = new DataContainer<T>();
2031         scheduleRequest(request, procedure, notify, container, result);
2032         acquire(notify, request);
2033         Throwable throwable = container.get();
2034         if (throwable != null) {
2035             if(throwable instanceof DatabaseException) throw (DatabaseException)throwable;
2036             else throw new DatabaseException("Unexpected exception", throwable);
2037         }
2038         return result.get();
2039     }
2040
2041     @Override
2042     public void syncRequest(Write request) throws DatabaseException  {
2043         assertNotSession();
2044         assertAlive();
2045         Semaphore notify = new Semaphore(0);
2046         final DataContainer<DatabaseException> exception = new DataContainer<DatabaseException>();
2047         scheduleRequest(request, e -> exception.set(e), notify);
2048         acquire(notify, request);
2049         if(exception.get() != null) throw exception.get();
2050     }
2051
2052     @Override
2053     public <T> T syncRequest(WriteResult<T> request) throws DatabaseException  {
2054         assertNotSession();
2055         Semaphore notify = new Semaphore(0);
2056         final DataContainer<Throwable> exception = new DataContainer<Throwable>();
2057         final DataContainer<T> result = new DataContainer<T>();
2058         scheduleRequest(request, new Procedure<T>() {
2059
2060             @Override
2061             public void exception(Throwable t) {
2062               exception.set(t);
2063             }
2064
2065             @Override
2066             public void execute(T t) {
2067               result.set(t);
2068             }
2069
2070         }, notify);
2071         acquire(notify, request);
2072         if(exception.get() != null) {
2073             Throwable t = exception.get();
2074             if(t instanceof DatabaseException) throw (DatabaseException)t;
2075             else throw new DatabaseException(t);
2076         }
2077         return result.get();
2078     }
2079
2080     @Override
2081     public <T> T syncRequest(WriteOnlyResult<T> request) throws DatabaseException  {
2082         assertNotSession();
2083         Semaphore notify = new Semaphore(0);
2084         final DataContainer<Throwable> exception = new DataContainer<Throwable>();
2085         final DataContainer<T> result = new DataContainer<T>();
2086         scheduleRequest(request, new Procedure<T>() {
2087
2088             @Override
2089             public void exception(Throwable t) {
2090               exception.set(t);
2091             }
2092
2093             @Override
2094             public void execute(T t) {
2095               result.set(t);
2096             }
2097
2098         }, notify);
2099         acquire(notify, request);
2100         if(exception.get() != null) {
2101             Throwable t = exception.get();
2102             if(t instanceof DatabaseException) throw (DatabaseException)t;
2103             else throw new DatabaseException(t);
2104         }
2105         return result.get();
2106     }
2107
2108     @Override
2109     public <T> T syncRequest(DelayedWriteResult<T> request) throws DatabaseException  {
2110         assertNotSession();
2111         Semaphore notify = new Semaphore(0);
2112         final DataContainer<Throwable> exception = new DataContainer<Throwable>();
2113         final DataContainer<T> result = new DataContainer<T>();
2114         scheduleRequest(request, new Procedure<T>() {
2115
2116             @Override
2117             public void exception(Throwable t) {
2118               exception.set(t);
2119             }
2120
2121             @Override
2122             public void execute(T t) {
2123               result.set(t);
2124             }
2125
2126         }, notify);
2127         acquire(notify, request);
2128         if(exception.get() != null) {
2129             Throwable t = exception.get();
2130             if(t instanceof DatabaseException) throw (DatabaseException)t;
2131             else throw new DatabaseException(t);
2132         }
2133         return result.get();
2134     }
2135
2136     @Override
2137     public void syncRequest(DelayedWrite request) throws DatabaseException  {
2138         assertNotSession();
2139         Semaphore notify = new Semaphore(0);
2140         final DataContainer<DatabaseException> exception = new DataContainer<DatabaseException>();
2141         scheduleRequest(request, e -> exception.set(e), notify);
2142         acquire(notify, request);
2143         if(exception.get() != null) throw exception.get();
2144     }
2145
2146     @Override
2147     public void syncRequest(WriteOnly request) throws DatabaseException  {
2148         assertNotSession();
2149         assertAlive();
2150         Semaphore notify = new Semaphore(0);
2151         final DataContainer<DatabaseException> exception = new DataContainer<DatabaseException>();
2152         scheduleRequest(request, e -> exception.set(e), notify);
2153         acquire(notify, request);
2154         if(exception.get() != null) throw exception.get();
2155     }
2156
2157     /*
2158      *
2159      * GraphRequestProcessor interface
2160      */
2161
2162     @Override
2163     public <T> void asyncRequest(final AsyncRead<T> request, final AsyncProcedure<T> procedure) {
2164
2165         scheduleRequest(request, procedure, null, null);
2166
2167     }
2168
2169     @Override
2170     public <T> void asyncRequest(final AsyncMultiRead<T> request, final AsyncMultiProcedure<T> procedure) {
2171
2172         scheduleRequest(request, procedure, null);
2173
2174     }
2175
2176     @Override
2177     public <T> void asyncRequest(final ExternalRead<T> request, final Procedure<T> procedure) {
2178
2179         scheduleRequest(request, procedure, null, null, null);
2180
2181     }
2182
2183     @Override
2184     public void asyncRequest(final Write request, final Consumer<DatabaseException> callback) {
2185
2186         scheduleRequest(request, callback, null);
2187
2188     }
2189
2190     @Override
2191     public <T> void asyncRequest(final WriteResult<T> request, final Procedure<T> procedure) {
2192
2193         scheduleRequest(request, procedure, null);
2194
2195     }
2196
2197     @Override
2198     public <T> void asyncRequest(final WriteOnlyResult<T> request, final Procedure<T> procedure) {
2199
2200         scheduleRequest(request, procedure, null);
2201
2202     }
2203
2204     @Override
2205     public <T> void asyncRequest(final DelayedWriteResult<T> request, final Procedure<T> procedure) {
2206
2207         scheduleRequest(request, procedure, null);
2208
2209     }
2210
2211     @Override
2212     public void asyncRequest(final DelayedWrite request, final Consumer<DatabaseException> callback) {
2213
2214         scheduleRequest(request, callback, null);
2215
2216     }
2217
2218     @Override
2219     public void asyncRequest(final Write r) {
2220         asyncRequest(r, null);
2221     }
2222
2223     @Override
2224     public void asyncRequest(final DelayedWrite r) {
2225         asyncRequest(r, null);
2226     }
2227
2228     @Override
2229     public void asyncRequest(final WriteOnly request, final Consumer<DatabaseException> callback) {
2230
2231         scheduleRequest(request, callback, null);
2232
2233     }
2234
2235     @Override
2236     public void asyncRequest(final WriteOnly request) {
2237
2238         asyncRequest(request, null);
2239
2240     }
2241
2242     @Override
2243     public <T> void async(ReadInterface<T> r, AsyncProcedure<T> procedure) {
2244         r.request(this, procedure);
2245     }
2246
2247     @Override
2248     public <T> void async(ReadInterface<T> r, Procedure<T> procedure) {
2249         r.request(this, procedure);
2250     }
2251
2252     @Override
2253     public <T> void async(ReadInterface<T> r, SyncProcedure<T> procedure) {
2254         r.request(this, procedure);
2255     }
2256
2257     @Override
2258     public <T> void async(ReadInterface<T> r, AsyncListener<T> procedure) {
2259         r.request(this, procedure);
2260     }
2261
2262     @Override
2263     public <T> void async(ReadInterface<T> r, Listener<T> procedure) {
2264         r.request(this, procedure);
2265     }
2266
2267     @Override
2268     public <T> void async(ReadInterface<T> r, SyncListener<T> procedure) {
2269         r.request(this, procedure);
2270     }
2271
2272     @Override
2273     public <T> T sync(ReadInterface<T> r) throws DatabaseException {
2274         return r.request(this);
2275     }
2276
2277     @Override
2278     public <T> T sync(WriteInterface<T> r) throws DatabaseException {
2279         return r.request(this);
2280     }
2281
2282     @Override
2283     public <T> void async(WriteInterface<T> r, Procedure<T> procedure) {
2284         r.request(this, procedure);
2285     }
2286
2287     @Override
2288     public <T> void async(WriteInterface<T> r) {
2289         r.request(this, new ProcedureAdapter<T>());
2290     }
2291
2292     //@Override
2293     public void incAsync() {
2294         state.incAsync();
2295     }
2296
2297     //@Override
2298     public void decAsync() {
2299         state.decAsync();
2300     }
2301
2302     public long getCluster(ResourceImpl resource) {
2303         ClusterI cluster = clusterTable.getClusterByResourceKey(resource.id);
2304         return cluster.getClusterId();
2305     }
2306
2307     public long getCluster(int id) {
2308         if (clusterTable == null)
2309             System.out.println("SessionImplSocket.getCluster() clusterTable == null !!!!! how come");
2310         return clusterTable.getClusterIdByResourceKeyNoThrow(id);
2311     }
2312
2313     public ResourceImpl getResource(int id) {
2314         return new ResourceImpl(resourceSupport, id);
2315     }
2316
2317     public ResourceImpl getResource(int resourceIndex, long clusterId) {
2318         assert (!ClusterTraitsBase.isIllegalResourceIndex(resourceIndex));
2319         ClusterI proxy = clusterTable.getClusterByClusterId(clusterId);
2320         int key = proxy.getClusterKey();
2321         int resourceKey = ClusterTraitsBase.createResourceKeyNoThrow(key, resourceIndex);
2322         return new ResourceImpl(resourceSupport, resourceKey);
2323     }
2324
2325     public ResourceImpl getResource2(int id) {
2326         assert (id != 0);
2327         return new ResourceImpl(resourceSupport, id);
2328     }
2329
2330     final public int getId(ResourceImpl impl) {
2331         return impl.id;
2332     }
2333
2334     public static final Charset UTF8 = Charset.forName("utf-8");
2335
2336
2337
2338
2339     static boolean areVirtualStatementsLoaded(final VirtualGraphServerSupportImpl support, int subject) {
2340         for(TransientGraph g : support.providers) {
2341             if(g.isPending(subject)) return false;
2342         }
2343         return true;
2344     }
2345
2346     static boolean areVirtualStatementsLoaded(final VirtualGraphServerSupportImpl support, int subject, int predicate) {
2347         for(TransientGraph g : support.providers) {
2348             if(g.isPending(subject, predicate)) return false;
2349         }
2350         return true;
2351     }
2352
2353     static void loadVirtualStatements(final VirtualGraphServerSupportImpl support, ReadGraphImpl graph, int subject, final Consumer<ReadGraphImpl> runnable) {
2354
2355         Consumer<ReadGraphImpl> composite = new Consumer<ReadGraphImpl>() {
2356
2357             AtomicInteger ready = new AtomicInteger(support.providers.size() + 1);
2358
2359             @Override
2360             public void accept(ReadGraphImpl graph) {
2361                 if(ready.decrementAndGet() == 0) {
2362                     runnable.accept(graph);
2363                 }
2364             }
2365
2366         };
2367
2368         for(TransientGraph g : support.providers) {
2369             if(g.isPending(subject)) {
2370                 try {
2371                     g.load(graph, subject, composite);
2372                 } catch (DatabaseException e) {
2373                     e.printStackTrace();
2374                 }
2375             } else {
2376                 composite.accept(graph);
2377             }
2378         }
2379
2380         composite.accept(graph);
2381
2382     }
2383
2384     static  void loadVirtualStatements(final VirtualGraphServerSupportImpl support, ReadGraphImpl graph, int subject, int predicate, final Consumer<ReadGraphImpl> runnable) {
2385
2386         Consumer<ReadGraphImpl> composite = new Consumer<ReadGraphImpl>() {
2387
2388             AtomicInteger ready = new AtomicInteger(support.providers.size() + 1);
2389
2390             @Override
2391             public void accept(ReadGraphImpl graph) {
2392                 if(ready.decrementAndGet() == 0) {
2393                     runnable.accept(graph);
2394                 }
2395             }
2396
2397         };
2398
2399         for(TransientGraph g : support.providers) {
2400             if(g.isPending(subject, predicate)) {
2401                 try {
2402                     g.load(graph, subject, predicate, composite);
2403                 } catch (DatabaseException e) {
2404                     e.printStackTrace();
2405                 }
2406             } else {
2407                 composite.accept(graph);
2408             }
2409         }
2410
2411         composite.accept(graph);
2412
2413     }
2414
2415 //    void dumpHeap() {
2416 //
2417 //        try {
2418 //            ManagementFactory.newPlatformMXBeanProxy(ManagementFactory.getPlatformMBeanServer(),
2419 //                    "com.sun.management:type=HotSpotDiagnostic", HotSpotDiagnosticMXBean.class).dumpHeap(
2420 //                    "d:/heap" + flushCounter + ".txt", true);
2421 //        } catch (IOException e) {
2422 //            e.printStackTrace();
2423 //        }
2424 //
2425 //    }
2426
2427     void fireReactionsToSynchronize(ChangeSet cs) {
2428
2429         // Do not fire empty events
2430         if (cs.isEmpty())
2431             return;
2432
2433         ReadGraphImpl g = ReadGraphImpl.create(getQueryProvider2());
2434 //        g.state.barrier.inc();
2435
2436         try {
2437
2438             if (!cs.isEmpty()) {
2439                 ChangeEvent e2 = new ChangeEvent(g.getSession(), g, null, cs);
2440                 for (ChangeListener l : changeListeners2) {
2441                     try {
2442                         l.graphChanged(e2);
2443                     } catch (Exception ex) {
2444                         ex.printStackTrace();
2445                     }
2446                 }
2447             }
2448
2449         } finally {
2450
2451 //            g.state.barrier.dec();
2452 //            g.waitAsync(null);
2453
2454         }
2455
2456     }
2457
2458     void fireReactionsToCommit(ReadGraphImpl graph, ChangeSet cs2) {
2459         try {
2460
2461             // Do not fire empty events
2462             if (cs2.isEmpty())
2463                 return;
2464
2465 //            graph.restart();
2466 //            graph.state.barrier.inc();
2467
2468             try {
2469
2470                 if (!cs2.isEmpty()) {
2471
2472                     ChangeEvent e2 = new ChangeEvent(graph.getSession(), graph, null, cs2);
2473                     for (ChangeListener l : changeListeners2) {
2474                         try {
2475                             l.graphChanged(e2);
2476 //                            System.out.println("changelistener " + l);
2477                         } catch (Exception ex) {
2478                             ex.printStackTrace();
2479                         }
2480                     }
2481
2482                 }
2483
2484             } finally {
2485
2486 //                graph.state.barrier.dec();
2487 //                graph.waitAsync(null);
2488
2489             }
2490         } catch (Throwable t) {
2491             t.printStackTrace();
2492
2493         }
2494     }
2495     void fireMetadataListeners(WriteGraphImpl graph, ChangeSet cs2) {
2496
2497         try {
2498
2499             // Do not fire empty events
2500             if (cs2.isEmpty())
2501                 return;
2502
2503             // Do not fire on virtual requests
2504             if(graph.getProvider() != null)
2505                 return;
2506
2507             WriteGraphImpl reactionGraph = WriteGraphImpl.create(graph.processor, writeSupport, null);
2508
2509             try {
2510
2511                 ChangeEvent e2 = new ChangeEvent(graph.getSession(), reactionGraph, graph, cs2);
2512                 for (ChangeListener l : metadataListeners) {
2513                     try {
2514                         l.graphChanged(e2);
2515                     } catch (Throwable ex) {
2516                         ex.printStackTrace();
2517                     }
2518                 }
2519
2520             } finally {
2521
2522             }
2523
2524         } catch (Throwable t) {
2525             t.printStackTrace();
2526         }
2527
2528     }
2529
2530
2531     /*
2532      * (non-Javadoc)
2533      *
2534      * @see org.simantics.db.ServiceLocator#getService(java.lang.Class)
2535      */
2536     @Override
2537     public <T> T getService(Class<T> api) {
2538         T t = peekService(api);
2539         if (t == null) {
2540             if (state.isClosed())
2541                 throw new ServiceNotFoundException(this, api, "Session has been shut down");
2542             throw new ServiceNotFoundException(this, api);
2543         }
2544         return t;
2545     }
2546
2547     /**
2548      * @return
2549      */
2550     protected abstract ServerInformation getCachedServerInformation();
2551
2552         private Class<?> serviceKey1 = null;
2553         private Class<?> serviceKey2 = null;
2554         private Object service1 = null;
2555         private Object service2 = null;
2556
2557     /*
2558      * (non-Javadoc)
2559      *
2560      * @see
2561      * fi.vtt.simantics.db.connection.ServiceLocator#peekService(java.lang.Class)
2562      */
2563     @SuppressWarnings("unchecked")
2564     @Override
2565     public synchronized <T> T peekService(Class<T> api) {
2566
2567                 if(serviceKey1 == api) {
2568                         return (T)service1;
2569                 } else if (serviceKey2 == api) {
2570                         // Promote this key
2571                         Object result = service2;
2572                         service2 = service1;
2573                         serviceKey2 = serviceKey1;
2574                         service1 = result;
2575                         serviceKey1 = api;
2576                         return (T)result;
2577                 }
2578
2579         if (Layer0.class == api)
2580                 return (T) L0;
2581         if (ServerInformation.class == api)
2582             return (T) getCachedServerInformation();
2583         else if (WriteGraphImpl.class == api)
2584             return (T) writeState.getGraph();
2585         else if (ClusterBuilder.class == api)
2586             return (T)new ClusterBuilderImpl(this, (WriteOnlySupport)writeState.getGraph().writeSupport);
2587         else if (ClusterBuilderFactory.class == api)
2588             return (T)new ClusterBuilderFactoryImpl(this);
2589
2590                 service2 = service1;
2591                 serviceKey2 = serviceKey1;
2592
2593         service1 = serviceLocator.peekService(api);
2594         serviceKey1 = api;
2595
2596         return (T)service1;
2597
2598     }
2599
2600     /*
2601      * (non-Javadoc)
2602      *
2603      * @see
2604      * fi.vtt.simantics.db.connection.ServiceLocator#hasService(java.lang.Class)
2605      */
2606     @Override
2607     public boolean hasService(Class<?> api) {
2608         return serviceLocator.hasService(api);
2609     }
2610
2611     /**
2612      * @param api the api that must be implemented by the specified service
2613      * @param service the service implementation
2614      */
2615     @Override
2616     public <T> void registerService(Class<T> api, T service) {
2617         if(Layer0.class == api) {
2618                 L0 = (Layer0)service;
2619                 return;
2620         }
2621         serviceLocator.registerService(api, service);
2622         if (TransactionPolicySupport.class == api) {
2623             transactionPolicy = (TransactionPolicySupport)service;
2624             state.resetTransactionPolicy();
2625         }
2626         if (api == serviceKey1)
2627                 service1 = service;
2628         else if (api == serviceKey2)
2629                 service2 = service;
2630     }
2631
2632     // ----------------
2633     // SessionMonitor
2634     // ----------------
2635
2636     void fireSessionVariableChange(String variable) {
2637         for (MonitorHandler h : monitorHandlers) {
2638             MonitorContext ctx = monitorContexts.getLeft(h);
2639             assert ctx != null;
2640             // SafeRunner functionality repeated here to avoid dependency.
2641             try {
2642                 h.valuesChanged(ctx);
2643             } catch (Exception e) {
2644                 Logger.defaultLogError("monitor handler notification produced the following exception", e);
2645             } catch (LinkageError e) {
2646                 Logger.defaultLogError("monitor handler notification produced a linkage error", e);
2647             }
2648         }
2649     }
2650
2651
2652     class ResourceSerializerImpl implements ResourceSerializer {
2653
2654         public long createRandomAccessId(int id) throws DatabaseException {
2655             if(id < 0)
2656                 return id;
2657             int index = ClusterTraitsBase.getResourceIndexFromResourceKey(id);
2658             long cluster = getCluster(id);
2659             if (0 == cluster)
2660                 return 0; // Better to return 0 then invalid id.
2661             long result = ClusterTraitsBase.createResourceId(cluster, index);
2662             return result;
2663         }
2664
2665         @Override
2666         public long getRandomAccessId(Resource resource) throws DatabaseException {
2667
2668             ResourceImpl resourceImpl = (ResourceImpl) resource;
2669             return createRandomAccessId(resourceImpl.id);
2670
2671         }
2672
2673         @Override
2674         public int getTransientId(Resource resource) throws DatabaseException {
2675
2676             ResourceImpl resourceImpl = (ResourceImpl) resource;
2677             return resourceImpl.id;
2678
2679         }
2680
2681         @Override
2682         public String createRandomAccessId(Resource resource)
2683         throws InvalidResourceReferenceException {
2684
2685             if(resource == null) throw new IllegalArgumentException();
2686
2687             ResourceImpl resourceImpl = (ResourceImpl) resource;
2688
2689             if (resourceImpl.id < 0) return String.valueOf(resourceImpl.id) + "_0";
2690
2691             int r;
2692             try {
2693                 r = ClusterTraits.getResourceIndexFromResourceKey(resourceImpl.id);
2694             } catch (DatabaseException e1) {
2695                 throw new InvalidResourceReferenceException(e1);
2696             }
2697             try {
2698                 // Serialize as '<resource index>_<cluster id>'
2699                 return "" + r + "_" + getCluster(resourceImpl);
2700             } catch (Throwable e) {
2701                 e.printStackTrace();
2702                 throw new InvalidResourceReferenceException(e);
2703             } finally {
2704             }
2705         }
2706
2707         public int getTransientId(long serialized) throws DatabaseException {
2708             if (serialized <= 0)
2709                 return (int)serialized;
2710             int index = ClusterTraitsBase.getResourceIndexFromResourceId(serialized);
2711             long c = ClusterTraitsBase.getClusterIdFromResourceId(serialized);
2712             ClusterI cluster = clusterTranslator.getClusterByClusterId(c);
2713             if (cluster == null)
2714                 throw new DatabaseException("Couldn't load cluster for id " + c + " for resource id " + serialized);
2715             int key = ClusterTraits.createResourceKey(cluster.getClusterKey(), index);
2716             return key;
2717         }
2718
2719         @Override
2720         public Resource getResource(long randomAccessId) throws DatabaseException {
2721             return getResourceByKey(getTransientId(randomAccessId));
2722         }
2723
2724         @Override
2725         public Resource getResource(int transientId) throws DatabaseException {
2726             return getResourceByKey(transientId);
2727         }
2728
2729         @Override
2730         public Resource getResource(String randomAccessId)
2731         throws InvalidResourceReferenceException {
2732             try {
2733                 int i = randomAccessId.indexOf('_');
2734                 if (i == -1)
2735                     throw new InvalidResourceReferenceException("Could not parse resource id + cluster id from '"
2736                             + randomAccessId + "'");
2737                 int r = Integer.parseInt(randomAccessId.substring(0, i));
2738                 if(r < 0) return getResourceByKey(r);
2739                 long c = Long.parseLong(randomAccessId.substring(i + 1));
2740                 ClusterI cluster = clusterTranslator.getClusterByClusterId(c);
2741                 int key = ClusterTraits.createResourceKey(cluster.getClusterKey(), r);
2742                 if (cluster.hasResource(key, clusterTranslator))
2743                     return getResourceByKey(key);
2744             } catch (InvalidResourceReferenceException e) {
2745                 throw e;
2746             } catch (NumberFormatException e) {
2747                 throw new InvalidResourceReferenceException(e);
2748             } catch (Throwable e) {
2749                 e.printStackTrace();
2750                 throw new InvalidResourceReferenceException(e);
2751             } finally {
2752             }
2753             throw new InvalidResourceReferenceException("Resource does not exist " + randomAccessId);
2754         }
2755
2756         @Override
2757         public boolean disposeRandomAccessId(String randomAccessId) throws InvalidResourceReferenceException {
2758             try {
2759                 return true;
2760             } catch (Throwable e) {
2761                 e.printStackTrace();
2762                 throw new InvalidResourceReferenceException(e);
2763             } finally {
2764             }
2765         }
2766     }
2767
2768     // Copied from old SessionImpl
2769
2770     void check() {
2771         if (state.isClosed())
2772             throw new Error("Session closed.");
2773     }
2774
2775
2776
2777     public ResourceImpl getNewResource(long clusterId) {
2778         ClusterI cluster = clusterTable.getClusterByClusterIdOrThrow(clusterId);
2779         int newId;
2780         try {
2781             newId = cluster.createResource(clusterTranslator);
2782         } catch (DatabaseException e) {
2783             Logger.defaultLogError(e);
2784             return null;
2785         }
2786         return new ResourceImpl(resourceSupport, newId);
2787     }
2788
2789     public ResourceImpl getNewResource(Resource clusterSet)
2790     throws DatabaseException {
2791         long resourceId = clusterSet.getResourceId();
2792         Long clusterId = clusterSetsSupport.get(resourceId);
2793         if (null == clusterId)
2794             throw new ClusterSetExistException("Cluster set does not exist. Resource=" + clusterSet);
2795         if (Constants.NewClusterId == clusterId) {
2796             clusterId = getService(ClusteringSupport.class).createCluster();
2797             if ((serviceMode & SERVICE_MODE_CREATE) > 0)
2798                 createdClusters.add(clusterId);
2799             clusterSetsSupport.put(resourceId, clusterId);
2800             return getNewResource(clusterId);
2801         } else {
2802             ClusterBase cb = clusterTranslator.getClusterByClusterId(clusterId);
2803             ResourceImpl result;
2804             if (cb.getNumberOfResources(clusterTranslator) >= ClusterTable.CLUSTER_FILL_SIZE) {
2805                 clusterId = getService(ClusteringSupport.class).createCluster();
2806                 if ((serviceMode & SERVICE_MODE_CREATE) > 0)
2807                     createdClusters.add(clusterId);
2808                 clusterSetsSupport.put(resourceId, clusterId);
2809                 return getNewResource(clusterId);
2810             } else {
2811                 result = getNewResource(clusterId);
2812                 int resultKey = querySupport.getId(result);
2813                 long resultCluster = querySupport.getClusterId(resultKey);
2814                 if (clusterId != resultCluster)
2815                     clusterSetsSupport.put(resourceId, resultCluster);
2816                 return result;
2817             }
2818         }
2819     }
2820
2821     public void getNewClusterSet(Resource clusterSet)
2822     throws DatabaseException {
2823         if (DEBUG)
2824             System.out.println("new cluster set=" + clusterSet);
2825         long resourceId = clusterSet.getResourceId();
2826         if (clusterSetsSupport.containsKey(resourceId))
2827             throw new ClusterSetExistException("Cluster set exist already. Resource=" + clusterSet);
2828         clusterSetsSupport.put(resourceId, Constants.NewClusterId);
2829     }
2830     public boolean containsClusterSet(Resource clusterSet)
2831     throws ServiceException {
2832         long resourceId = clusterSet.getResourceId();
2833         return clusterSetsSupport.containsKey(resourceId);
2834     }
2835     public Resource setDefaultClusterSet4NewResource(Resource clusterSet) {
2836         Resource r = defaultClusterSet;
2837         defaultClusterSet = clusterSet;
2838         return r;
2839     }
2840     void printDiagnostics() {
2841
2842         if (DIAGNOSTICS) {
2843
2844             final DataContainer<Long> totalMem = new DataContainer<Long>(0L);
2845             final DataContainer<Long> residentClusters = new DataContainer<Long>(0L);
2846             for(ClusterI cluster : clusterTable.getClusters()) {
2847                 try {
2848                     if (cluster.isLoaded() && !cluster.isEmpty()) {
2849                         residentClusters.set(residentClusters.get() + 1);
2850                         totalMem.set(totalMem.get() + cluster.getUsedSpace());
2851                     }
2852                 } catch (DatabaseException e) {
2853                     Logger.defaultLogError(e);
2854                 }
2855             }
2856
2857             System.out.println("--------------------------------");
2858             System.out.println("Cluster information:");
2859             System.out.println("-amount of resident clusters=" + residentClusters.get());
2860             System.out.println("-total memory usage=" + totalMem.get() / 1024 + "kB");
2861
2862             for(ClusterI cluster : clusterTable.getClusters()) {
2863                 System.out.print("Cluster " + cluster.getClusterId() + " [");
2864                 try {
2865                     if (!cluster.isLoaded())
2866                         System.out.println("not loaded]");
2867                     else if (cluster.isEmpty())
2868                         System.out.println("is empty]");
2869                     else {
2870                         System.out.print("resources=" + cluster.getNumberOfResources(clusterTranslator));
2871                         System.out.print(",references=" + cluster.getReferenceCount());
2872                         System.out.println(",memory=" + cluster.getUsedSpace() / 1024 + "kB]");
2873                     }
2874                 } catch (DatabaseException e) {
2875                     Logger.defaultLogError(e);
2876                     System.out.println("is corrupted]");
2877                 }
2878             }
2879
2880             queryProvider2.printDiagnostics();
2881             System.out.println("--------------------------------");
2882         }
2883
2884     }
2885
2886     public void fireStartReadTransaction() {
2887
2888         if (DIAGNOSTICS)
2889             System.out.println("StartReadTransaction");
2890
2891         for (SessionEventListener listener : eventListeners) {
2892             try {
2893                 listener.readTransactionStarted();
2894             } catch (Throwable t) {
2895                 t.printStackTrace();
2896             }
2897         }
2898
2899     }
2900
2901     public void fireFinishReadTransaction() {
2902
2903         if (DIAGNOSTICS)
2904             System.out.println("FinishReadTransaction");
2905
2906         for (SessionEventListener listener : eventListeners) {
2907             try {
2908                 listener.readTransactionFinished();
2909             } catch (Throwable t) {
2910                 t.printStackTrace();
2911             }
2912         }
2913
2914     }
2915
2916     public void fireStartWriteTransaction() {
2917
2918         if (DIAGNOSTICS)
2919             System.out.println("StartWriteTransaction");
2920
2921         for (SessionEventListener listener : eventListeners) {
2922             try {
2923                 listener.writeTransactionStarted();
2924             } catch (Throwable t) {
2925                 t.printStackTrace();
2926             }
2927         }
2928
2929     }
2930
2931     public void fireFinishWriteTransaction() {
2932
2933         if (DIAGNOSTICS)
2934             System.out.println("FinishWriteTransaction");
2935
2936         for (SessionEventListener listener : eventListeners) {
2937             try {
2938                 listener.writeTransactionFinished();
2939             } catch (Throwable t) {
2940                 t.printStackTrace();
2941             }
2942         }
2943
2944         Indexing.resetDependenciesIndexingDisabled();
2945
2946     }
2947
2948     Resource deserialize(final long resourceId, final long clusterId) throws IOException {
2949         throw new Error("Not supported at the moment.");
2950     }
2951
2952     State getState() {
2953         return state;
2954     }
2955
2956     ClusterTable getClusterTable() {
2957         return clusterTable;
2958     }
2959
2960     public GraphSession getGraphSession() {
2961         return graphSession;
2962     }
2963
2964     public QueryProcessor getQueryProvider2() {
2965         return queryProvider2;
2966     }
2967
2968     ClientChangesImpl getClientChanges() {
2969         return clientChanges;
2970     }
2971
2972     boolean getWriteOnly() {
2973         return writeOnly;
2974     }
2975
2976     static int counter = 0;
2977
2978     public void onClusterLoaded(long clusterId) {
2979
2980         clusterTable.updateSize();
2981
2982     }
2983
2984
2985
2986
2987     /*
2988      * Implementation of the interface RequestProcessor
2989      */
2990
2991     @Override
2992     public <T> T syncRequest(final Read<T> request) throws DatabaseException {
2993
2994         assertNotSession();
2995         assertAlive();
2996
2997         assert(request != null);
2998
2999         final DataContainer<T> result = new DataContainer<T>();
3000         final DataContainer<Throwable> exception = new DataContainer<Throwable>();
3001
3002         syncRequest(request, new AsyncProcedure<T>() {
3003
3004             @Override
3005             public void execute(AsyncReadGraph graph, T t) {
3006                 result.set(t);
3007             }
3008
3009             @Override
3010             public void exception(AsyncReadGraph graph, Throwable t) {
3011                 exception.set(t);
3012             }
3013
3014         });
3015
3016         Throwable t = exception.get();
3017         if(t != null) {
3018             if(t instanceof DatabaseException) throw (DatabaseException)t;
3019             else throw new DatabaseException("Unexpected exception in ReadGraph.syncRequest(Read)", t);
3020         }
3021
3022         return result.get();
3023
3024     }
3025
3026 //    @Override
3027 //    public <T> T syncRequest(Read<T> request, AsyncListener<T> procedure) throws DatabaseException {
3028 //        assertNotSession();
3029 //        return syncRequest(request, (AsyncProcedure<T>)procedure);
3030 //    }
3031
3032     @Override
3033     public <T> T syncRequest(Read<T> request, SyncListener<T> procedure) throws DatabaseException {
3034         assertNotSession();
3035         return syncRequest(request, new SyncToAsyncListener<T>(procedure));
3036     }
3037
3038     @Override
3039     public <T> T syncRequest(Read<T> request, final Listener<T> procedure) throws DatabaseException {
3040         assertNotSession();
3041         return syncRequest(request, new NoneToAsyncListener<T>(procedure));
3042     }
3043
3044     @Override
3045     public <T> T syncRequest(final Read<T> request, final SyncProcedure<T> procedure) throws DatabaseException {
3046         assertNotSession();
3047         return syncRequest(request, new SyncToAsyncProcedure<T>(procedure));
3048     }
3049
3050     @Override
3051     public <T> T syncRequest(Read<T> request, Procedure<T> procedure) throws DatabaseException {
3052         assertNotSession();
3053         return syncRequest(request, new NoneToAsyncProcedure<T>(procedure));
3054     }
3055
3056     @Override
3057     public <T> T syncRequest(final AsyncRead<T> request) throws DatabaseException {
3058
3059         assertNotSession();
3060
3061         assert(request != null);
3062
3063         final DataContainer<T> result = new DataContainer<T>();
3064         final DataContainer<Throwable> exception = new DataContainer<Throwable>();
3065
3066         syncRequest(request, new AsyncProcedure<T>() {
3067
3068             @Override
3069             public void execute(AsyncReadGraph graph, T t) {
3070                 result.set(t);
3071             }
3072
3073             @Override
3074             public void exception(AsyncReadGraph graph, Throwable t) {
3075                 exception.set(t);
3076             }
3077
3078         });
3079
3080         Throwable t = exception.get();
3081         if(t != null) {
3082             if(t instanceof DatabaseException) throw (DatabaseException)t;
3083             else throw new DatabaseException("Unexpected exception in ReadGraph.syncRequest(Read)", t);
3084         }
3085
3086         return result.get();
3087
3088     }
3089
3090     @Override
3091     public <T> T syncRequest(AsyncRead<T> request, AsyncListener<T> procedure) throws DatabaseException {
3092         assertNotSession();
3093         return syncRequest(request, (AsyncProcedure<T>)procedure);
3094     }
3095
3096     @Override
3097     public <T> T syncRequest(AsyncRead<T> request, SyncListener<T> procedure) throws DatabaseException {
3098         assertNotSession();
3099         return syncRequest(request, new SyncToAsyncListener<T>(procedure));
3100     }
3101
3102     @Override
3103     public <T> T syncRequest(AsyncRead<T> request, Listener<T> procedure) throws DatabaseException {
3104         assertNotSession();
3105         return syncRequest(request, new NoneToAsyncListener<T>(procedure));
3106     }
3107
3108     @Override
3109     public <T> T syncRequest(AsyncRead<T> request, final SyncProcedure<T> procedure) throws DatabaseException {
3110         assertNotSession();
3111         return syncRequest(request, new SyncToAsyncProcedure<T>(procedure));
3112     }
3113
3114     @Override
3115     final public <T> T syncRequest(final AsyncRead<T> request, final Procedure<T> procedure) throws DatabaseException {
3116         assertNotSession();
3117         return syncRequest(request, new NoneToAsyncProcedure<T>(procedure));
3118     }
3119
3120     @Override
3121     public <T> Collection<T> syncRequest(MultiRead<T> request) throws DatabaseException {
3122
3123         assertNotSession();
3124
3125         assert(request != null);
3126
3127         final ArrayList<T> result = new ArrayList<T>();
3128         final DataContainer<Throwable> exception = new DataContainer<Throwable>();
3129
3130         syncRequest(request, new SyncMultiProcedure<T>() {
3131
3132             @Override
3133             public void execute(ReadGraph graph, T t) {
3134                 synchronized(result) {
3135                     result.add(t);
3136                 }
3137             }
3138
3139             @Override
3140             public void finished(ReadGraph graph) {
3141             }
3142
3143             @Override
3144             public void exception(ReadGraph graph, Throwable t) {
3145                 exception.set(t);
3146             }
3147
3148
3149         });
3150
3151         Throwable t = exception.get();
3152         if(t != null) {
3153             if(t instanceof DatabaseException) throw (DatabaseException)t;
3154             else throw new DatabaseException("Unexpected exception in ReadGraph.syncRequest(Read)", t);
3155         }
3156
3157         return result;
3158
3159     }
3160
3161     @Override
3162     public <T> Collection<T> syncRequest(MultiRead<T> arg0, SyncMultiProcedure<T> arg1) throws DatabaseException {
3163         assertNotSession();
3164         throw new Error("Not implemented!");
3165     }
3166
3167     @Override
3168     public <T> Collection<T> syncRequest(MultiRead<T> request, SyncMultiListener<T> procedure) throws DatabaseException {
3169         assertNotSession();
3170         return syncRequest(request, (SyncMultiProcedure<T>)procedure);
3171     }
3172
3173     @Override
3174     public <T> Collection<T> syncRequest(MultiRead<T> request, MultiListener<T> procedure) throws DatabaseException {
3175         assertNotSession();
3176         return syncRequest(request, new NoneToSyncMultiListener<T>(procedure));
3177     }
3178
3179     @Override
3180     public <T> Collection<T> syncRequest(MultiRead<T> request, MultiProcedure<T> procedure) throws DatabaseException {
3181         assertNotSession();
3182         return syncRequest(request, new NoneToSyncMultiProcedure<T>(procedure));
3183     }
3184
3185     @Override
3186     final public <T> Collection<T> syncRequest(final AsyncMultiRead<T> request) throws DatabaseException {
3187
3188         assertNotSession();
3189
3190         assert(request != null);
3191
3192         final ArrayList<T> result = new ArrayList<T>();
3193         final DataContainer<Throwable> exception = new DataContainer<Throwable>();
3194
3195         syncRequest(request, new AsyncMultiProcedure<T>() {
3196
3197             @Override
3198             public void execute(AsyncReadGraph graph, T t) {
3199                 synchronized(result) {
3200                     result.add(t);
3201                 }
3202             }
3203
3204             @Override
3205             public void finished(AsyncReadGraph graph) {
3206             }
3207
3208             @Override
3209             public void exception(AsyncReadGraph graph, Throwable t) {
3210                 exception.set(t);
3211             }
3212
3213
3214         });
3215
3216         Throwable t = exception.get();
3217         if(t != null) {
3218             if(t instanceof DatabaseException) throw (DatabaseException)t;
3219             else throw new DatabaseException("Unexpected exception in ReadGraph.syncRequest(Read)", t);
3220         }
3221
3222         return result;
3223
3224     }
3225
3226     @Override
3227     public <T> Collection<T> syncRequest(AsyncMultiRead<T> request, AsyncMultiListener<T> procedure) throws DatabaseException {
3228         assertNotSession();
3229         return syncRequest(request, (AsyncMultiProcedure<T>)procedure);
3230     }
3231
3232     @Override
3233     public <T> Collection<T> syncRequest(AsyncMultiRead<T> request, SyncMultiListener<T> procedure) throws DatabaseException {
3234         assertNotSession();
3235         return syncRequest(request, new SyncToAsyncMultiListener<T>(procedure));
3236     }
3237
3238     @Override
3239     public <T> Collection<T> syncRequest(AsyncMultiRead<T> request, MultiListener<T> procedure) throws DatabaseException {
3240         assertNotSession();
3241        return syncRequest(request, new NoneToAsyncMultiListener<T>(procedure));
3242     }
3243
3244     @Override
3245     public <T> Collection<T> syncRequest(AsyncMultiRead<T> request, final SyncMultiProcedure<T> procedure) throws DatabaseException {
3246         assertNotSession();
3247         return syncRequest(request, new SyncToAsyncMultiProcedure<T>(procedure));
3248     }
3249
3250     @Override
3251     final public <T> Collection<T> syncRequest(final AsyncMultiRead<T> request, final MultiProcedure<T> procedure) throws DatabaseException {
3252         assertNotSession();
3253         return syncRequest(request, new NoneToAsyncMultiProcedure<T>(procedure));
3254     }
3255
3256
3257     @Override
3258     public <T> void asyncRequest(Read<T> request) {
3259
3260         asyncRequest(request, new ProcedureAdapter<T>() {
3261             @Override
3262             public void exception(Throwable t) {
3263                 t.printStackTrace();
3264             }
3265         });
3266
3267     }
3268
3269     @Override
3270     public <T> void asyncRequest(Read<T> request, AsyncListener<T> procedure) {
3271         asyncRequest(request, (AsyncProcedure<T>)procedure);
3272     }
3273
3274     @Override
3275     public <T> void asyncRequest(Read<T> request, final SyncListener<T> procedure) {
3276         asyncRequest(request, new SyncToAsyncListener<T>(procedure));
3277     }
3278
3279     @Override
3280     public <T> void asyncRequest(Read<T> request, final Listener<T> procedure) {
3281         asyncRequest(request, new NoneToAsyncListener<T>(procedure));
3282     }
3283
3284     @Override
3285     public <T> void asyncRequest(Read<T> request, SyncProcedure<T> procedure) {
3286         asyncRequest(request, new SyncToAsyncProcedure<T>(procedure));
3287     }
3288
3289     @Override
3290     public <T> void asyncRequest(Read<T> request, final Procedure<T> procedure) {
3291         asyncRequest(request, new NoneToAsyncProcedure<T>(procedure));
3292     }
3293
3294     @Override
3295     final public <T> void asyncRequest(final AsyncRead<T> request) {
3296
3297         assert(request != null);
3298
3299         asyncRequest(request, new ProcedureAdapter<T>() {
3300             @Override
3301             public void exception(Throwable t) {
3302                 t.printStackTrace();
3303             }
3304         });
3305
3306     }
3307
3308     @Override
3309     public <T> void asyncRequest(AsyncRead<T> request, AsyncListener<T> procedure) {
3310         scheduleRequest(request, procedure, procedure, null);
3311     }
3312
3313     @Override
3314     public <T> void asyncRequest(AsyncRead<T> request, final SyncListener<T> procedure) {
3315         asyncRequest(request, new SyncToAsyncListener<T>(procedure));
3316     }
3317
3318     @Override
3319     public <T> void asyncRequest(AsyncRead<T> request, final Listener<T> procedure) {
3320         asyncRequest(request, new NoneToAsyncListener<T>(procedure));
3321     }
3322
3323     @Override
3324     public <T> void asyncRequest(AsyncRead<T> request, SyncProcedure<T> procedure) {
3325         asyncRequest(request, new SyncToAsyncProcedure<T>(procedure));
3326     }
3327
3328     @Override
3329     final public <T> void asyncRequest(final AsyncRead<T> request, final Procedure<T> procedure) {
3330         asyncRequest(request, new NoneToAsyncProcedure<T>(procedure));
3331     }
3332
3333     @Override
3334     public <T> void asyncRequest(MultiRead<T> request) {
3335
3336         assert(request != null);
3337
3338         asyncRequest(request, new SyncMultiProcedureAdapter<T>() {
3339             @Override
3340             public void exception(ReadGraph graph, Throwable t) {
3341                 t.printStackTrace();
3342             }
3343         });
3344
3345     }
3346
3347     @Override
3348     public <T> void asyncRequest(MultiRead<T> request, SyncMultiListener<T> procedure) {
3349         asyncRequest(request, (SyncMultiProcedure<T>)procedure);
3350     }
3351
3352     @Override
3353     public <T> void asyncRequest(MultiRead<T> request, MultiListener<T> procedure) {
3354         asyncRequest(request, new NoneToSyncMultiListener<T>(procedure));
3355     }
3356
3357     @Override
3358     public <T> void asyncRequest(MultiRead<T> request, SyncMultiProcedure<T> procedure) {
3359         scheduleRequest(request, procedure, null);
3360     }
3361
3362     @Override
3363     public <T> void asyncRequest(MultiRead<T> request, MultiProcedure<T> procedure) {
3364         asyncRequest(request, new NoneToSyncMultiProcedure<T>(procedure));
3365     }
3366
3367     @Override
3368     final public <T> void asyncRequest(AsyncMultiRead<T> request) {
3369
3370         assert(request != null);
3371
3372         asyncRequest(request, new AsyncMultiProcedureAdapter<T>() {
3373             @Override
3374             public void exception(AsyncReadGraph graph, Throwable t) {
3375                 t.printStackTrace();
3376             }
3377         });
3378
3379     }
3380
3381     @Override
3382     public <T> void asyncRequest(AsyncMultiRead<T> request, AsyncMultiListener<T> procedure) {
3383         asyncRequest(request, (AsyncMultiProcedure<T>)procedure);
3384     }
3385
3386     @Override
3387     public <T> void asyncRequest(AsyncMultiRead<T> request, SyncMultiListener<T> procedure) {
3388         asyncRequest(request, new SyncToAsyncMultiListener<T>(procedure));
3389     }
3390
3391     @Override
3392     public <T> void asyncRequest(AsyncMultiRead<T> request, MultiListener<T> procedure) {
3393         asyncRequest(request, new NoneToAsyncMultiListener<T>(procedure));
3394     }
3395
3396     @Override
3397     public <T> void asyncRequest(AsyncMultiRead<T> request, SyncMultiProcedure<T> procedure) {
3398         asyncRequest(request, new SyncToAsyncMultiProcedure<T>(procedure));
3399     }
3400
3401     @Override
3402     final public <T> void asyncRequest(AsyncMultiRead<T> request, final MultiProcedure<T> procedure) {
3403         asyncRequest(request, new NoneToAsyncMultiProcedure<T>(procedure));
3404     }
3405
3406     @Override
3407     final public <T> void asyncRequest(final ExternalRead<T> request) {
3408
3409         assert(request != null);
3410
3411         asyncRequest(request, new ProcedureAdapter<T>() {
3412             @Override
3413             public void exception(Throwable t) {
3414                 t.printStackTrace();
3415             }
3416         });
3417
3418     }
3419
3420     @Override
3421     public <T> void asyncRequest(ExternalRead<T> request, final Listener<T> procedure) {
3422         asyncRequest(request, (Procedure<T>)procedure);
3423     }
3424
3425
3426
3427     void check(Throwable t) throws DatabaseException {
3428         if(t != null) {
3429             if(t instanceof DatabaseException) throw (DatabaseException)t;
3430             else throw new DatabaseException("Unexpected exception", t);
3431         }
3432     }
3433
3434     void check(DataContainer<Throwable> container) throws DatabaseException {
3435         Throwable t = container.get();
3436         if(t != null) {
3437             if(t instanceof DatabaseException) throw (DatabaseException)t;
3438             else throw new DatabaseException("Unexpected exception", t);
3439         }
3440     }
3441
3442
3443
3444
3445
3446
3447     boolean sameProvider(Write request) {
3448         if(writeState.getGraph().provider != null) {
3449             return writeState.getGraph().provider.equals(request.getProvider());
3450         } else {
3451             return request.getProvider() == null;
3452         }
3453     }
3454
3455     boolean plainWrite(WriteGraphImpl graph) {
3456         if(graph == null) return false;
3457         if(graph.writeSupport.writeOnly()) return false;
3458         return true;
3459     }
3460
3461
3462     public static final ThreadGroup SessionThreadGroup = new ThreadGroup("Session Thread Group");
3463     private void assertNotSession() throws DatabaseException {
3464         Thread current = Thread.currentThread();
3465         if(sessionThreads.contains(current)) throw new DatabaseException("Caller is already inside a transaction.");
3466     }
3467
3468     void assertAlive() {
3469         if (!state.isAlive())
3470             throw new RuntimeDatabaseException("Session has been shut down.");
3471     }
3472
3473     public InputStream getValueStream(ReadGraphImpl graph, Resource resource) {
3474         return querySupport.getValueStream(graph, querySupport.getId(resource));
3475     }
3476
3477     public byte[] getValue(ReadGraphImpl graph, Resource resource) {
3478         return querySupport.getValue(graph, querySupport.getId(resource));
3479     }
3480
3481     <T> void acquire(Semaphore semaphore, T request) throws DatabaseException {
3482         acquire(semaphore, request, null);
3483     }
3484
3485     private <T,P> void acquire(Semaphore semaphore, T request, P procedure) throws DatabaseException {
3486         assertAlive();
3487         try {
3488             long tryCount = 0;
3489             // Loop until the semaphore is acquired reporting requests that take a long time.
3490             while (true) {
3491
3492                 if (semaphore.tryAcquire(DebugPolicy.LONG_EXECUTION_REPORT_PERIOD, DebugPolicy.LONG_EXECUTION_REPORT_PERIOD_UNIT)) {
3493                     // Acquired OK.
3494                     return;
3495                 } else {
3496                     if (DebugPolicy.REPORT_TIME_CONSUMING_REQUESTS) {
3497                         ++tryCount;
3498                         long waitTime = DebugPolicy.LONG_EXECUTION_REPORT_PERIOD_UNIT
3499                                 .toMillis(DebugPolicy.LONG_EXECUTION_REPORT_PERIOD)
3500                                 * tryCount;
3501                         System.err.println("DB client request '" + request + "' is taking long to execute, so far "
3502                                 + (waitTime) + " ms. (procedure=" + procedure + ")");
3503                     }
3504                 }
3505
3506                 assertAlive();
3507
3508             }
3509         } catch (InterruptedException e) {
3510             e.printStackTrace();
3511             // FIXME: Should perhaps do something else in this case ??
3512         }
3513     }
3514
3515
3516
3517 //    @Override
3518 //    public boolean holdOnToTransactionAfterCancel() {
3519 //        return transactionPolicy.holdOnToTransactionAfterCancel();
3520 //    }
3521 //
3522 //    @Override
3523 //    public boolean holdOnToTransactionAfterCommit() {
3524 //        return transactionPolicy.holdOnToTransactionAfterCommit();
3525 //    }
3526 //
3527 //    @Override
3528 //    public boolean holdOnToTransactionAfterRead() {
3529 //        return transactionPolicy.holdOnToTransactionAfterRead();
3530 //    }
3531 //
3532 //    @Override
3533 //    public void onRelinquish() {
3534 //        transactionPolicy.onRelinquish();
3535 //    }
3536 //
3537 //    @Override
3538 //    public void onRelinquishDone() {
3539 //        transactionPolicy.onRelinquishDone();
3540 //    }
3541 //
3542 //    @Override
3543 //    public void onRelinquishError() {
3544 //        transactionPolicy.onRelinquishError();
3545 //    }
3546
3547
3548     @Override
3549     public Session getSession() {
3550         return this;
3551     }
3552
3553
3554     protected abstract VirtualGraph getProvider(VirtualGraph virtualGraph);
3555     protected abstract ResourceImpl getNewResource() throws DatabaseException;
3556
3557     public void ceased(int thread) {
3558
3559         requestManager.ceased(thread);
3560
3561     }
3562
3563     public int getAmountOfQueryThreads() {
3564         // This must be a power of two
3565         return 1;
3566 //        return Integer.highestOneBit(Runtime.getRuntime().availableProcessors());
3567     }
3568
3569     public Resource getResourceByKey(int key) throws ResourceNotFoundException {
3570
3571         return new ResourceImpl(resourceSupport, key);
3572
3573     }
3574
3575     public void acquireWriteOnly() {
3576         writeOnly = true;
3577     }
3578
3579     public void releaseWriteOnly(ReadGraphImpl graph) {
3580         writeOnly = false;
3581         queryProvider2.releaseWrite(graph);
3582     }
3583
3584     public void handleUpdatesAndMetadata(WriteGraphImpl writer) {
3585
3586         long start = System.nanoTime();
3587
3588         while(dirtyPrimitives) {
3589             dirtyPrimitives = false;
3590             getQueryProvider2().performDirtyUpdates(writer);
3591             getQueryProvider2().performScheduledUpdates(writer);
3592         }
3593
3594         fireMetadataListeners(writer, clientChanges);
3595
3596         if(DebugPolicy.PERFORMANCE_DATA) {
3597             long end = System.nanoTime();
3598             System.err.println("handleUpdatesAndMetadata " + 1e-9*(end-start));
3599         }
3600
3601     }
3602
3603     void removeTemporaryData() {
3604         File platform = Platform.getLocation().toFile();
3605         File tempFiles = new File(platform, "tempFiles");
3606         File temp = new File(tempFiles, "db");
3607         if(!temp.exists())
3608             return;
3609         try {
3610             Files.walkFileTree(temp.toPath(), new SimpleFileVisitor<Path>() {
3611                 @Override
3612                 public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) {
3613                     try {
3614                         Files.delete(file);
3615                     } catch (IOException e) {
3616                         Logger.defaultLogError(e);
3617                     }
3618                     return FileVisitResult.CONTINUE;
3619                 }
3620             });
3621         } catch (IOException e) {
3622             Logger.defaultLogError(e);
3623         }
3624     }
3625
3626     public void handleCreatedClusters() {
3627         if ((serviceMode & SERVICE_MODE_CREATE) > 0) {
3628             createdClusters.forEach(new TLongProcedure() {
3629
3630                 @Override
3631                 public boolean execute(long value) {
3632                     ClusterImpl cluster = clusterTable.getClusterByClusterId(value);
3633                     cluster.setImmutable(true, clusterTranslator);
3634                     return true;
3635                 }
3636             });
3637         }
3638         createdClusters.clear();
3639     }
3640
3641     @Override
3642     public Object getModificationCounter() {
3643         return queryProvider2.modificationCounter;
3644     }
3645
3646     @Override
3647     public void markUndoPoint() {
3648         state.setCombine(false);
3649     }
3650
3651 }