bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/genericrelation/DependenciesRelation.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 org.simantics.db.layer0.genericrelation;
  13
  14 import java.util.ArrayList;
  15 import java.util.Arrays;
  16 import java.util.Collection;
  17 import java.util.Collections;
  18 import java.util.HashSet;
  19 import java.util.List;
  20 import java.util.Map;
  21 import java.util.UUID;
  22
  23 import org.simantics.databoard.Bindings;
  24 import org.simantics.databoard.util.ObjectUtils;
  25 import org.simantics.datatypes.literal.GUID;
  26 import org.simantics.db.AsyncReadGraph;
  27 import org.simantics.db.ChangeSet;
  28 import org.simantics.db.ChangeSet.StatementChange;
  29 import org.simantics.db.MetadataI;
  30 import org.simantics.db.ReadGraph;
  31 import org.simantics.db.RequestProcessor;
  32 import org.simantics.db.Resource;
  33 import org.simantics.db.Session;
  34 import org.simantics.db.Statement;
  35 import org.simantics.db.WriteGraph;
  36 import org.simantics.db.common.Indexing;
  37 import org.simantics.db.common.changeset.GenericChangeListener;
  38 import org.simantics.db.common.request.IndexRoot;
  39 import org.simantics.db.common.request.ReadRequest;
  40 import org.simantics.db.common.request.SuperTypeString;
  41 import org.simantics.db.common.request.TypeString;
  42 import org.simantics.db.common.request.UnaryRead;
  43 import org.simantics.db.common.utils.Logger;
  44 import org.simantics.db.common.utils.NameUtils;
  45 import org.simantics.db.event.ChangeListener;
  46 import org.simantics.db.exception.DatabaseException;
  47 import org.simantics.db.layer0.adapter.GenericRelation;
  48 import org.simantics.db.layer0.adapter.GenericRelationIndex;
  49 import org.simantics.db.layer0.genericrelation.DependencyChanges.Change;
  50 import org.simantics.db.layer0.genericrelation.DependencyChanges.ComponentAddition;
  51 import org.simantics.db.layer0.genericrelation.DependencyChanges.ComponentModification;
  52 import org.simantics.db.layer0.genericrelation.DependencyChanges.ComponentRemoval;
  53 import org.simantics.db.layer0.genericrelation.DependencyChanges.LinkChange;
  54 import org.simantics.db.procedure.AsyncContextMultiProcedure;
  55 import org.simantics.db.procedure.AsyncContextProcedure;
  56 import org.simantics.db.service.CollectionSupport;
  57 import org.simantics.db.service.DirectQuerySupport;
  58 import org.simantics.db.service.GraphChangeListenerSupport;
  59 import org.simantics.db.service.ManagementSupport;
  60 import org.simantics.db.service.SerialisationSupport;
  61 import org.simantics.layer0.Layer0;
  62 import org.simantics.operation.Layer0X;
  63 import org.simantics.utils.datastructures.Pair;
  64 import org.simantics.utils.logging.TimeLogger;
  65
  66 public class DependenciesRelation extends UnsupportedRelation implements GenericRelationIndex {
  67
  68         private static final boolean DEBUG = false;
  69         static final boolean DEBUG_LISTENERS = false;
  70         private static final boolean PROFILE = false;
  71
  72         @SuppressWarnings("unchecked")
  73         private final static Pair<String, String>[] fields = new Pair[] {
  74                 Pair.make(Dependencies.FIELD_MODEL, "Long"),
  75                 Pair.make(Dependencies.FIELD_PARENT, "Long"),
  76                 Pair.make(Dependencies.FIELD_RESOURCE, "Long"),
  77                 Pair.make(Dependencies.FIELD_NAME, "String"),
  78                 Pair.make(Dependencies.FIELD_TYPES, "Text"),
  79                 Pair.make(Dependencies.FIELD_GUID, "Text")
  80         };
  81
  82         final Resource resource;
  83
  84         public DependenciesRelation(ReadGraph graph, Resource resource) {
  85                 this.resource = resource;
  86                 synchronized(this) {
  87                         Session session = graph.getSession();
  88                         DependenciesListenerStore store = session.peekService(DependenciesListenerStore.class);
  89                         if(store == null) session.registerService(DependenciesListenerStore.class, new DependenciesListenerStore());
  90                 }
  91         }
  92
  93         class Process {
  94
  95                 final ArrayList<Entry> result = new ArrayList<Entry>();
  96                 final AsyncContextMultiProcedure<Resource, Resource> structure;
  97                 final AsyncContextProcedure<Entry, String> names;
  98                 final AsyncContextProcedure<Entry, Resource> type;
  99
 100                 Process(ReadGraph graph, final Resource resource) throws DatabaseException {
 101
 102                         final Layer0 L0 = Layer0.getInstance(graph);
 103                         final DirectQuerySupport dqs = graph.getService(DirectQuerySupport.class);
 104                         final CollectionSupport cs = graph.getService(CollectionSupport.class);
 105
 106                         names = dqs.compilePossibleRelatedValue(graph, L0.HasName, new AsyncContextProcedure<Entry, String>() {
 107
 108                                 @Override
 109                                 public void execute(AsyncReadGraph graph, Entry entry, String name) {
 110                                         entry.name = name;
 111                                 }
 112
 113                                 @Override
 114                                 public void exception(AsyncReadGraph graph, Throwable throwable) {
 115                                         Logger.defaultLogError(throwable);
 116                                 }
 117
 118                         });
 119
 120                         type = new AsyncContextProcedure<Entry, Resource>() {
 121
 122                                 @Override
 123                                 public void execute(AsyncReadGraph graph, Entry entry, Resource type) {
 124                                         entry.principalType = type;
 125                                 }
 126
 127                                 @Override
 128                                 public void exception(AsyncReadGraph graph, Throwable throwable) {
 129                                         Logger.defaultLogError(throwable);
 130                                 }
 131
 132                         };
 133
 134                         structure = dqs.compileForEachObject(graph, L0.ConsistsOf, new AsyncContextMultiProcedure<Resource, Resource>() {
 135
 136                                 @Override
 137                                 public void execute(AsyncReadGraph graph, Resource parent, Resource child) {
 138                                         // WORKAROUND: don't browse virtual child resources
 139                                         if(!child.isPersistent()) return;
 140                                         Entry entry = new Entry(parent, child, "", "", "");
 141                                         result.add(entry);
 142                                         dqs.forEachObjectCompiled(graph, child, child, structure);
 143                                         dqs.forPossibleRelatedValueCompiled(graph, child, entry, names);
 144                                         dqs.forPossibleDirectType(graph, child, entry, type);
 145                                 }
 146
 147                                 @Override
 148                                 public void finished(AsyncReadGraph graph) {
 149                                 }
 150
 151                                 @Override
 152                                 public void exception(AsyncReadGraph graph, Throwable throwable) {
 153                                         Logger.defaultLogError(throwable);
 154                                 }
 155
 156                         });
 157
 158                         graph.syncRequest(new ReadRequest() {
 159
 160                                 @Override
 161                                 public void run(ReadGraph graph) throws DatabaseException {
 162                                         dqs.forEachObjectCompiled(graph, resource, resource, structure);
 163                                 }
 164
 165                         });
 166
 167             Map<Resource, String> typeStrings = cs.createMap(String.class);
 168                         for(Entry e : result) {
 169                                 if(e.principalType != null) {
 170                                     String typeString = typeStrings.get(e.principalType);
 171                                     if(typeString == null) {
 172                                         typeString = graph.syncRequest(new SuperTypeString(e.principalType));
 173                                         if (typeString.isEmpty()) {
 174                                             Logger.defaultLogError(new DatabaseException("No name for type " + NameUtils.getURIOrSafeNameInternal(graph, e.resource) + " (" + e.resource + ")"));
 175                                         }
 176                                         typeStrings.put(e.principalType, typeString);
 177                                     }
 178                                     e.types = typeString;
 179                                 } else {
 180                                     e.types = graph.syncRequest(new TypeString(L0, graph.getTypes(e.resource)));
 181                                 }
 182                                 GUID id = graph.getPossibleRelatedValue(e.resource, L0.identifier, GUID.BINDING);
 183                                 if(id != null)
 184                                         e.id = id.indexString();
 185                                 else
 186                                         e.id = "";
 187                         }
 188
 189                         //SessionGarbageCollection.gc(null, graph.getSession(), false, null);
 190
 191                 }
 192
 193         }
 194
 195         public ArrayList<Entry> find(ReadGraph graph, final Resource model) throws DatabaseException {
 196                 return new Process(graph, model).result;
 197         }
 198
 199         @Override
 200         public GenericRelation select(String bindingPattern, Object[] constants) {
 201                 checkSelectionArguments(bindingPattern, constants, new String[] { Dependencies.getBindingPattern() });
 202                 final long subjectId = (Long)constants[0];
 203                 return new UnsupportedRelation() {
 204
 205                         @Override
 206                         public boolean isRealizable() {
 207                                 return true;
 208                         }
 209
 210                         @Override
 211                         final public List<Object[]> realize(ReadGraph graph) throws DatabaseException {
 212
 213                                 long time = System.nanoTime();
 214
 215                 SerialisationSupport ss = graph.getService(SerialisationSupport.class);
 216
 217                                 Resource subject = ss.getResource(subjectId);
 218
 219                                 Collection<Entry> entries = find(graph, subject);
 220
 221                                 long time2 = System.nanoTime();
 222
 223                                 if (PROFILE)
 224                                         System.out.println("Found " + entries.size() + " dependencies in " + 1e-6 * (time2 - time) + "ms for " + graph.getPossibleURI(subject) + ".");
 225
 226                                 ArrayList<Object[]> result = new ArrayList<Object[]>();
 227                                 for (Entry entry : entries) {
 228                                         result.add(new Object[] { ss.getRandomAccessId(entry.parent), ss.getRandomAccessId(entry.resource), entry.name, entry.types, entry.id });
 229                                 }
 230                                 return result;
 231
 232                         }
 233
 234                 };
 235         }
 236
 237         @Override
 238         public Pair<String, String>[] getFields() {
 239                 return fields;
 240         }
 241
 242         @Override
 243         public List<Map<String, Object>> query(RequestProcessor session, String search, String bindingPattern, Object[] constants, int maxResultCount) {
 244                 if(!Dependencies.getBindingPattern().equals(bindingPattern)) throw new IllegalArgumentException("DependenciesRelation supports indexing only with 'bfffff'");
 245                 IndexedRelations indexer = session.getService(IndexedRelations.class);
 246                 return indexer.query(null, search, session, resource, (Resource)constants[0], maxResultCount);
 247         }
 248
 249         @Override
 250         public List<Resource> queryResources(RequestProcessor session, String search, String bindingPattern, Object[] constants, int maxResultCount) {
 251                 if(!Dependencies.getBindingPattern().equals(bindingPattern)) throw new IllegalArgumentException("DependenciesRelation supports indexing only with 'bfffff'");
 252                 IndexedRelations indexer = session.getService(IndexedRelations.class);
 253                 return indexer.queryResources(null, search, session, resource, (Resource)constants[0], maxResultCount);
 254         }
 255
 256         @Override
 257         public List<Map<String, Object>> list(RequestProcessor session, String bindingPattern, Object[] constants, int maxResultCount) {
 258                 if(!Dependencies.getBindingPattern().equals(bindingPattern)) throw new IllegalArgumentException("DependenciesRelation supports indexing only with 'bfffff'");
 259                 IndexedRelations indexer = session.getService(IndexedRelations.class);
 260                 return indexer.query(null, null, session, resource, (Resource)constants[0], maxResultCount);
 261         }
 262
 263         public static class DependencyChangesRequest extends UnaryRead<ChangeSet, DependencyChanges> {
 264
 265                 @SuppressWarnings("unused")
 266                 final private static boolean LOG = false;
 267
 268                 public DependencyChangesRequest(ChangeSet parameter) {
 269                         super(parameter);
 270                 }
 271
 272                 @Override
 273                 public DependencyChanges perform(ReadGraph graph) throws DatabaseException {
 274
 275                         DependencyChangesWriter w = new DependencyChangesWriter(graph);
 276                         Layer0 l0 = w.l0;
 277                         Resource changeInformation = graph.getPossibleResource("http://www.simantics.org/Modeling-1.2/changeInformation/Inverse");
 278
 279                         for (Resource value : parameter.changedValues()) {
 280                                 Statement modifiedComponent = graph.getPossibleStatement(value, l0.PropertyOf);
 281                                 if (modifiedComponent == null
 282                                                 || modifiedComponent.getPredicate().equals(changeInformation))
 283                                         continue;
 284                                 //System.err.println("+comp modi " + NameUtils.getSafeName(graph, renamedComponent, true));
 285                                 w.addComponentModification(modifiedComponent.getObject());
 286                         }
 287                         for (Resource value : parameter.changedResources()) {
 288                                 // No more info => need to check further
 289                                 if(!graph.isImmutable(value))
 290                                         w.addComponentModification(value);
 291                         }
 292                         for (StatementChange change : parameter.changedStatements()) {
 293                                 //System.err.println("-stm " + NameUtils.getSafeName(graph, change.getSubject(), true) + " " + NameUtils.getSafeName(graph, change.getPredicate(), true) + " " + NameUtils.getSafeName(graph, change.getObject(), true));
 294                                 Resource subject = change.getSubject();
 295                                 Resource predicate = change.getPredicate();
 296                                 Resource object = change.getObject();
 297                                 if(!object.isPersistent()) continue;
 298                                 if (predicate.equals(l0.ConsistsOf)) {
 299                                         if (change.isClaim())
 300                                                 w.addComponentAddition(subject, object);
 301                                         else
 302                                                 w.addComponentRemoval(subject, object);
 303                                 } else if (predicate.equals(l0.IsLinkedTo)) {
 304                                         w.addLinkChange(subject);
 305                                 } else /*if (graph.isSubrelationOf(predicate, l0.DependsOn))*/ {
 306                                         //System.err.println("-modi " + NameUtils.getSafeName(graph, subject, true));
 307                                         w.addComponentModification(subject);
 308                                 }
 309                         }
 310                         return w.getResult();
 311                 }
 312
 313         };
 314
 315         private static int trackers = 0;
 316
 317         private static ChangeListener listener;
 318
 319         public static void assertFinishedTracking() {
 320             if(trackers != 0) throw new IllegalStateException("Trackers should be 0 (was " + trackers + ")");
 321         }
 322
 323         @Override
 324         public synchronized void untrack(RequestProcessor processor, final Resource model) {
 325
 326             trackers--;
 327
 328             if(trackers < 0) throw new IllegalStateException("Dependency tracking reference count is broken");
 329
 330             if(trackers == 0) {
 331
 332                 if(listener == null) throw new IllegalStateException("Dependency tracking was not active");
 333
 334                 GraphChangeListenerSupport changeSupport = processor.getService(GraphChangeListenerSupport.class);
 335                 changeSupport.removeMetadataListener(listener);
 336                 listener = null;
 337
 338             }
 339
 340         }
 341
 342         @Override
 343         public synchronized void trackAndIndex(RequestProcessor processor, Resource model__) {
 344
 345             if(trackers == 0) {
 346
 347                 if(listener != null) throw new IllegalStateException("Dependency tracking was active");
 348
 349                 listener = new GenericChangeListener<DependencyChangesRequest, DependencyChanges>() {
 350
 351                     @Override
 352                     public boolean preEventRequest() {
 353                         return !Indexing.isDependenciesIndexingDisabled();
 354                     }
 355
 356                     @Override
 357                     public void onEvent(ReadGraph graph, MetadataI metadata, DependencyChanges event) throws DatabaseException {
 358
 359                         TimeLogger.log(DependenciesRelation.class, "trackAndIndex.onEvent: starting index update processing");
 360
 361                         if(DEBUG)
 362                             System.err.println("Adding metadata " + event + " in revision " + graph.getService(ManagementSupport.class).getHeadRevisionId());
 363
 364                         WriteGraph w = (WriteGraph)graph;
 365                         if(!event.isEmpty())
 366                                 w.addMetadata(event);
 367
 368                         final Session session = graph.getSession();
 369                         final IndexedRelations indexer = session.getService(IndexedRelations.class);
 370                         Layer0 L0 = Layer0.getInstance(graph);
 371                         SerialisationSupport ss = graph.getService(SerialisationSupport.class);
 372
 373                         for(Map.Entry<Resource, Change[]>  modelEntry : event.get().entrySet()) {
 374
 375                             final Resource model = modelEntry.getKey();
 376                             final Change[] changes = modelEntry.getValue();
 377
 378                             boolean linkChange = false;
 379
 380                             Collection<Object[]> _additions = Collections.emptyList();
 381                             Collection<Object> _removals = Collections.emptyList();
 382                             Collection<Object> _replacementKeys = Collections.emptyList();
 383                             Collection<Object[]> _replacementObjects = Collections.emptyList();
 384                             Collection<Pair<String, String>> _typeChanges = Collections.emptyList();
 385
 386                             if(DEBUG) System.out.println("MODEL: " + NameUtils.getSafeLabel(graph, model));
 387                             //                final Change[] changes = event.get(model);
 388                             if(DEBUG) System.out.println("  CHANGES: " + Arrays.toString(changes));
 389                             if (changes != null) {
 390                                 _additions = new ArrayList<Object[]>();
 391                                 _removals = new ArrayList<Object>();
 392                                 _replacementKeys = new ArrayList<Object>();
 393                                 _replacementObjects = new ArrayList<Object[]>();
 394                                 _typeChanges = new HashSet<Pair<String, String>>();
 395
 396                                 for (Change _entry : changes) {
 397                                     if (_entry instanceof ComponentAddition) {
 398                                         ComponentAddition entry = (ComponentAddition)_entry;
 399                                         final String name = graph.getPossibleRelatedValue(entry.component, L0.HasName, Bindings.STRING);
 400                                         final GUID id = graph.getPossibleRelatedValue(entry.component, L0.identifier, GUID.BINDING);
 401                                         final String types = graph.syncRequest(new TypeString(L0, graph.getTypes(entry.component)));
 402                                         if (name != null && types != null) {
 403                                                 if(!entry.isValid(graph)) continue;
 404                                             Resource parent = graph.getPossibleObject(entry.component, L0.PartOf);
 405                                             if (parent != null) {
 406                                                 _additions.add(new Object[] { ss.getRandomAccessId(parent), ss.getRandomAccessId(entry.component), name, types, id != null ? id.indexString() : "" });
 407                                             } else {
 408                                                     //System.err.println("resource " + entry.component + ": no parent for entry " + name + " " + types);
 409                                             }
 410                                         } else {
 411                                             //System.err.println("resource " + entry.component + ": " + name + " " + types);
 412                                         }
 413                                     } else if(_entry instanceof ComponentModification) {
 414                                         ComponentModification entry = (ComponentModification)_entry;
 415                                         final String name = graph.getPossibleRelatedValue(entry.component, L0.HasName, Bindings.STRING);
 416                                         final GUID id = graph.getPossibleRelatedValue(entry.component, L0.identifier, GUID.BINDING);
 417                                         if(graph.isInstanceOf(entry.component, L0.Type)) {
 418                                             SerialisationSupport support = session.getService(SerialisationSupport.class);
 419                                             _typeChanges.add(new Pair<String, String>(name, String.valueOf(support.getRandomAccessId((Resource) entry.component))));
 420                                         } else {
 421                                             final String types = graph.syncRequest(new TypeString(L0, graph.getTypes(entry.component)));
 422                                             if (name != null && types != null) {
 423                                                 Resource part = graph.getPossibleObject(entry.component, L0.PartOf);
 424                                                 if(part != null) {
 425                                                     _replacementKeys.add(ss.getRandomAccessId(entry.component));
 426                                                     _replacementObjects.add(new Object[] { ss.getRandomAccessId(part),
 427                                                             ss.getRandomAccessId(entry.component), name, types, id != null ? id.indexString() : "" });
 428                                                 }
 429                                             }
 430                                         }
 431                                     } else if (_entry instanceof ComponentRemoval) {
 432                                         ComponentRemoval entry = (ComponentRemoval)_entry;
 433                                         if(!entry.isValid(graph)) continue;
 434                                         _removals.add(ss.getRandomAccessId(((ComponentRemoval)_entry).component));
 435                                     } else if (_entry instanceof LinkChange) {
 436                                         linkChange = true;
 437                                     }
 438                                 }
 439                             }
 440
 441                             final boolean reset = linkChange || event.hasUnresolved;
 442                             //System.err.println("dependencies(" + NameUtils.getSafeLabel(graph, model) + "): reset=" + reset + " linkChange=" + linkChange + " unresolved=" + event.hasUnresolved );
 443
 444                             if (reset || !_additions.isEmpty() || !_removals.isEmpty() || !_replacementKeys.isEmpty() || !_typeChanges.isEmpty()) {
 445
 446                                 TimeLogger.log(DependenciesRelation.class, "trackAndIndex.onEvent: starting index update");
 447
 448                                 final Collection<Object[]> additions = _additions;
 449                                 final Collection<Object> removals = _removals;
 450                                 final Collection<Object> replacementKeys = _replacementKeys;
 451                                 final Collection<Object[]> replacementObjects = _replacementObjects;
 452                                 final boolean typeNameChanges = typeNameChanges(graph, indexer, model, _typeChanges);
 453
 454                             final UUID pending = Indexing.makeIndexPending();
 455
 456                             {
 457                                 {
 458                                         try {
 459                                             boolean didChange = false;
 460                                             // Unresolved and linkChanges are not relevant any more
 461                                             boolean doReset = typeNameChanges;
 462
 463                                             if (doReset) {
 464
 465                                             if(DEBUG) {
 466                                                 System.err.println("resetIndex " + reset + " " + typeNameChanges);
 467                                             }
 468
 469                                                 indexer.removeAll(null, graph, DependenciesRelation.this, resource, model);
 470                                                 didChange = true;
 471
 472                                             } else {
 473
 474                                                 if (!replacementKeys.isEmpty() && (replacementKeys.size() == replacementObjects.size())) {
 475                                                     if(DEBUG) {
 476                                                         System.out.println(replacementKeys.size() + " index replacements: " + replacementKeys);
 477                                                     }
 478                                                     didChange |= indexer.replace(null, graph, DependenciesRelation.this, resource, model, Dependencies.FIELD_RESOURCE, replacementKeys, replacementObjects);
 479                                                 }
 480                                                 if (!removals.isEmpty()) {
 481                                                     if(DEBUG) {
 482                                                         System.out.println(removals.size() + " index removals: " + removals);
 483                                                     }
 484                                                     indexer.remove(null, graph, DependenciesRelation.this, resource, model, Dependencies.FIELD_RESOURCE, removals);
 485                                                     didChange = true;
 486                                                 }
 487                                                 if (!additions.isEmpty()) {
 488                                                     if(DEBUG) {
 489                                                         for(Object[] os : additions) System.err.println("Adding to index " + model + ": " + Arrays.toString(os));
 490                                                     }
 491                                                     //System.out.println(additions.size() + " index insertions");
 492                                                     indexer.insert(null, graph, DependenciesRelation.this, resource, model, additions);
 493                                                     didChange = true;
 494                                                 }
 495
 496                                             }
 497
 498                                             if (didChange)
 499                                                 // TODO: because this data is ran with
 500                                                 // ThreadUtils.getBlockingWorkExecutor()
 501                                                 // fireListeners needs to use peekService,
 502                                                 // not getService since there is no
 503                                                 // guarantee that the session isn't being
 504                                                 // disposed while this method is executing.
 505                                                 fireListeners(graph, model);
 506
 507                                         } catch (Throwable t) {
 508                                             // Just to know if something unexpected happens here.
 509                                             Logger.defaultLogError("Dependencies index update failed for model "
 510                                                     + model + " and relation " + resource + ".", t);
 511                                             t.printStackTrace();
 512
 513                                             // NOTE: Last resort: failure to update index
 514                                             // properly results in removal of the whole index.
 515                                             // This is the only thing that can be done
 516                                             // at this point to ensure that the index will
 517                                             // return correct results in the future, through
 518                                             // complete reinitialization.
 519                                             //indexer.removeAll(null, session, DependenciesRelation.this, resource, model);
 520                                         } finally {
 521                                             Indexing.releaseIndexPending(pending);
 522                                             Indexing.clearCaches(model);
 523                                         }
 524                                 }
 525                             }
 526
 527                                 TimeLogger.log(DependenciesRelation.class, "trackAndIndex.onEvent: index update done");
 528                             }
 529                         }
 530
 531                     }
 532
 533                 };
 534
 535                 GraphChangeListenerSupport changeSupport = processor.getService(GraphChangeListenerSupport.class);
 536                 changeSupport.addMetadataListener(listener);
 537
 538             }
 539
 540             trackers++;
 541
 542         }
 543
 544         private boolean typeNameChanges(ReadGraph graph, IndexedRelations indexer,
 545                         Resource model, final Collection<Pair<String, String>> typeChanges)
 546                         throws DatabaseException {
 547                 if (typeChanges.isEmpty())
 548                         return false;
 549
 550                 for (Pair<String, String> nr : typeChanges) {
 551                         String query = Dependencies.FIELD_RESOURCE + ":[" + nr.second + " TO " + nr.second + "]";
 552                         //System.out.println("query: " + query);
 553                         List<Map<String, Object>> results = indexer.query(null, query, graph, resource, model, Integer.MAX_VALUE);
 554                         if (results.size() != 1) {
 555                                 return true;
 556                         } else {
 557                                 Map<String, Object> result = results.get(0);
 558                                 if (!ObjectUtils.objectEquals(result.get(Dependencies.FIELD_NAME), nr.first)) {
 559                                         return true;
 560                                 }
 561                         }
 562 //                      System.err.println("Type " + nr.first + " was unchanged.");
 563                 }
 564                 return false;
 565         }
 566
 567         @Override
 568         public void addListener(RequestProcessor processor, Resource model, Runnable observer) {
 569                 DependenciesListenerStore store = processor.getSession().getService(DependenciesListenerStore.class);
 570                 store.addListener(model, observer);
 571         }
 572
 573         @Override
 574         public void removeListener(RequestProcessor processor, Resource model, Runnable observer) {
 575                 DependenciesListenerStore store = processor.getSession().getService(DependenciesListenerStore.class);
 576                 store.removeListener(model, observer);
 577         }
 578
 579         void fireListeners(RequestProcessor processor, Resource model) {
 580                 DependenciesListenerStore store = processor.getSession().peekService(DependenciesListenerStore.class);
 581                 if (store != null)
 582                         store.fireListeners(model);
 583         }
 584
 585         @Override
 586         public void reset(RequestProcessor processor, Resource input) {
 587                 if (DEBUG) {
 588                         System.out.println("DependenciesRelation.reset: " + input);
 589                         new Exception("DependenciesRelation.reset(" + listener + ")").printStackTrace(System.out);
 590                 }
 591                 DependenciesListenerStore store = processor.getSession().getService(DependenciesListenerStore.class);
 592                 store.fireListeners(input);
 593         }
 594
 595         public static void addSubtree(ReadGraph graph, Resource root) throws DatabaseException {
 596
 597                 Resource indexRoot = graph.syncRequest(new IndexRoot(root));
 598                 addSubtree(graph, indexRoot, root);
 599
 600         }
 601
 602         public static void addSubtree(ReadGraph graph, Resource indexRoot, Resource subtreeRoot) throws DatabaseException {
 603
 604                 DependenciesRelation dr = new DependenciesRelation(graph, indexRoot);
 605         SerialisationSupport ss = graph.getService(SerialisationSupport.class);
 606
 607         ArrayList<Entry> entries = dr.find(graph, subtreeRoot);
 608         entries.add(new Entry(graph, subtreeRoot));
 609
 610                 ArrayList<Object[]> result = new ArrayList<Object[]>(entries.size());
 611                 for (Entry entry : entries) {
 612                         result.add(new Object[] { ss.getRandomAccessId(entry.parent), ss.getRandomAccessId(entry.resource), entry.name, entry.types, entry.id });
 613                 }
 614
 615                 Layer0X L0X = Layer0X.getInstance(graph);
 616         IndexedRelations indexer = graph.getService(IndexedRelations.class);
 617         indexer.insert(null, graph, dr, L0X.DependenciesRelation, indexRoot, result);
 618
 619         }
 620
 621 }