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.Set;
  22 import java.util.UUID;
  23
  24 import org.simantics.databoard.Bindings;
  25 import org.simantics.databoard.util.ObjectUtils;
  26 import org.simantics.datatypes.literal.GUID;
  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.NameUtils;
  44 import org.simantics.db.event.ChangeListener;
  45 import org.simantics.db.exception.DatabaseException;
  46 import org.simantics.db.exception.NoSingleResultException;
  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.SyncContextMultiProcedure;
  55 import org.simantics.db.procedure.SyncContextProcedure;
  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 import org.slf4j.LoggerFactory;
  66
  67 public class DependenciesRelation extends UnsupportedRelation implements GenericRelationIndex {
  68
  69     private static final org.slf4j.Logger LOGGER = LoggerFactory.getLogger(DependenciesRelation.class);
  70         private static final boolean DEBUG = false;
  71         static final boolean DEBUG_LISTENERS = false;
  72         private static final boolean PROFILE = false;
  73
  74         @SuppressWarnings("unchecked")
  75         private final static Pair<String, String>[] fields = new Pair[] {
  76                 Pair.make(Dependencies.FIELD_MODEL, "Long"),
  77                 Pair.make(Dependencies.FIELD_PARENT, "Long"),
  78                 Pair.make(Dependencies.FIELD_RESOURCE, "Long"),
  79                 Pair.make(Dependencies.FIELD_NAME, "String"),
  80                 Pair.make(Dependencies.FIELD_TYPES, "Text"),
  81                 Pair.make(Dependencies.FIELD_GUID, "Text"),
  82                 Pair.make(Dependencies.FIELD_NAME_SEARCH, "Text"),
  83                 Pair.make(Dependencies.FIELD_TYPES_SEARCH, "Text"),
  84                 Pair.make(Dependencies.FIELD_TYPE_RESOURCE, "Text")
  85         };
  86
  87         final Resource resource;
  88
  89         public DependenciesRelation(ReadGraph graph, Resource resource) {
  90                 this.resource = resource;
  91                 synchronized(this) {
  92                         Session session = graph.getSession();
  93                         DependenciesListenerStore store = session.peekService(DependenciesListenerStore.class);
  94                         if(store == null) session.registerService(DependenciesListenerStore.class, new DependenciesListenerStore());
  95                 }
  96         }
  97
  98         class Process {
  99
 100                 final ArrayList<Entry> result = new ArrayList<Entry>();
 101                 final SyncContextMultiProcedure<Resource, Resource> structure;
 102                 final SyncContextProcedure<Entry, String> names;
 103                 final SyncContextProcedure<Entry, Resource> type;
 104
 105                 Process(ReadGraph graph, final Resource resource) throws DatabaseException {
 106
 107                         final Layer0 L0 = Layer0.getInstance(graph);
 108                         final DirectQuerySupport dqs = graph.getService(DirectQuerySupport.class);
 109                         final CollectionSupport cs = graph.getService(CollectionSupport.class);
 110
 111                         names = dqs.compilePossibleRelatedValue(graph, L0.HasName, new SyncContextProcedure<Entry, String>() {
 112
 113                                 @Override
 114                                 public void execute(ReadGraph graph, Entry entry, String name) {
 115                                         entry.name = name;
 116                                 }
 117
 118                                 @Override
 119                                 public void exception(ReadGraph graph, Throwable throwable) {
 120                                         LOGGER.error("Could not compile possible related value for resource {}", resource, throwable);
 121                                 }
 122
 123                         });
 124
 125                         type = new SyncContextProcedure<Entry, Resource>() {
 126
 127                                 @Override
 128                                 public void execute(ReadGraph graph, Entry entry, Resource type) {
 129                                         entry.principalType = type;
 130                                 }
 131
 132                                 @Override
 133                                 public void exception(ReadGraph graph, Throwable throwable) {
 134                                         LOGGER.error("Could not find type for resource {}", resource, throwable);
 135                                 }
 136
 137                         };
 138
 139                         structure = dqs.compileForEachObject(graph, L0.ConsistsOf, new SyncContextMultiProcedure<Resource, Resource>() {
 140
 141                                 @Override
 142                                 public void execute(ReadGraph graph, Resource parent, Resource child) {
 143                                         // WORKAROUND: don't browse virtual child resources
 144                                         if(!child.isPersistent()) return;
 145                                         Entry entry = new Entry(parent, child, "", "", "");
 146                                         result.add(entry);
 147                                         dqs.forEachObjectCompiled(graph, child, child, structure);
 148                                         dqs.forPossibleRelatedValueCompiled(graph, child, entry, names);
 149                                         dqs.forPossibleDirectType(graph, child, entry, type);
 150                                 }
 151
 152                                 @Override
 153                                 public void finished(ReadGraph graph, Resource parent) {
 154                                 }
 155
 156                                 @Override
 157                                 public void exception(ReadGraph graph, Throwable throwable) {
 158                                     if (throwable instanceof NoSingleResultException) {
 159                                         // Ignore
 160                                         if (LOGGER.isDebugEnabled())
 161                                             LOGGER.debug("Could not compile for resource {}", resource, throwable);
 162                                     } else {
 163                                         LOGGER.error("Could not compile for resource {}", resource, throwable);
 164                                     }
 165                                 }
 166
 167                         });
 168
 169                         result.add(new Entry(graph, resource));
 170
 171                         graph.syncRequest(new ReadRequest() {
 172
 173                                 @Override
 174                                 public void run(ReadGraph graph) throws DatabaseException {
 175                                         dqs.forEachObjectCompiled(graph, resource, resource, structure);
 176                                 }
 177
 178                         });
 179
 180                         Map<Resource, Pair<String, String>> typeStrings = cs.createMap(String.class);
 181                         for(Entry e : result) {
 182                                 if(e.principalType != null) {
 183                                         Pair<String, String> typeString = typeStrings.get(e.principalType);
 184                                         if(typeString == null) {
 185                                                 String superTypeString = graph.syncRequest(new SuperTypeString(e.principalType));
 186                                                 if (superTypeString.isEmpty()) {
 187                                                         LOGGER.error("No name for type", new DatabaseException("No name for type " + NameUtils.getURIOrSafeNameInternal(graph, e.resource) + " (" + e.resource + ")"));
 188                                                 }
 189                                                 String superTypeIds = IndexQueries.toResourceIdString(e.principalType, graph.getSupertypes(e.principalType));
 190                                                 typeString = Pair.make(superTypeString, superTypeIds);
 191                                                 typeStrings.put(e.principalType, typeString);
 192                                         }
 193                                         e.types = typeString.first;
 194                                         e.typeId = typeString.second;
 195                                 } else {
 196                                         Set<Resource> typeSet = graph.getTypes(e.resource);
 197                                         e.types = graph.syncRequest(new TypeString(L0, typeSet));
 198                                         e.typeId = IndexQueries.toResourceIdString(typeSet);
 199                                 }
 200                                 e.id = IndexQueries.idFromGUID( graph.getPossibleRelatedValue(e.resource, L0.identifier, GUID.BINDING) );
 201                         }
 202
 203                         //SessionGarbageCollection.gc(null, graph.getSession(), false, null);
 204
 205                 }
 206
 207         }
 208
 209         public ArrayList<Entry> find(ReadGraph graph, final Resource model) throws DatabaseException {
 210                 return new Process(graph, model).result;
 211         }
 212
 213         @Override
 214         public GenericRelation select(String bindingPattern, Object[] constants) {
 215                 checkSelectionArguments(bindingPattern, constants, new String[] { Dependencies.getBindingPattern() });
 216                 final long subjectId = (Long)constants[0];
 217                 return new UnsupportedRelation() {
 218
 219                         @Override
 220                         public boolean isRealizable() {
 221                                 return true;
 222                         }
 223
 224                         @Override
 225                         final public List<Object[]> realize(ReadGraph graph) throws DatabaseException {
 226
 227                                 long time = System.nanoTime();
 228
 229                                 SerialisationSupport ss = graph.getService(SerialisationSupport.class);
 230
 231                                 Resource subject = ss.getResource(subjectId);
 232
 233                                 Collection<Entry> entries = find(graph, subject);
 234
 235                                 long time2 = System.nanoTime();
 236
 237                                 if (PROFILE)
 238                                         LOGGER.info("Found " + entries.size() + " dependencies in " + 1e-6 * (time2 - time) + "ms for " + graph.getPossibleURI(subject) + ".");
 239
 240                                 ArrayList<Object[]> result = new ArrayList<>();
 241                                 for (Entry entry : entries) {
 242                                         if(entry.name == null) continue;
 243                                         result.add(new Object[] { ss.getRandomAccessId(entry.parent), ss.getRandomAccessId(entry.resource), entry.name, entry.types, entry.id, entry.name, entry.types, entry.typeId });
 244                                 }
 245                                 return result;
 246
 247                         }
 248
 249                 };
 250         }
 251
 252         @Override
 253         public Pair<String, String>[] getFields() {
 254                 return fields;
 255         }
 256
 257         @Override
 258         public List<Map<String, Object>> query(RequestProcessor session, String search, String bindingPattern, Object[] constants, int maxResultCount) {
 259                 if(!Dependencies.getBindingPattern().equals(bindingPattern)) throw new IllegalArgumentException("DependenciesRelation supports indexing only with 'bfffffff'");
 260                 IndexedRelations indexer = session.getService(IndexedRelations.class);
 261                 return indexer.query(null, search, session, resource, (Resource)constants[0], maxResultCount);
 262         }
 263
 264         @Override
 265         public List<Resource> queryResources(RequestProcessor session, String search, String bindingPattern, Object[] constants, int maxResultCount) {
 266                 if(!Dependencies.getBindingPattern().equals(bindingPattern)) throw new IllegalArgumentException("DependenciesRelation supports indexing only with 'bfffffff'");
 267                 IndexedRelations indexer = session.getService(IndexedRelations.class);
 268                 return indexer.queryResources(null, search, session, resource, (Resource)constants[0], maxResultCount);
 269         }
 270
 271         @Override
 272         public List<Map<String, Object>> list(RequestProcessor session, String bindingPattern, Object[] constants, int maxResultCount) {
 273                 if(!Dependencies.getBindingPattern().equals(bindingPattern)) throw new IllegalArgumentException("DependenciesRelation supports indexing only with 'bfffffff'");
 274                 IndexedRelations indexer = session.getService(IndexedRelations.class);
 275                 return indexer.query(null, null, session, resource, (Resource)constants[0], maxResultCount);
 276         }
 277
 278         public static class DependencyChangesRequest extends UnaryRead<ChangeSet, DependencyChanges> {
 279
 280                 @SuppressWarnings("unused")
 281                 final private static boolean LOG = false;
 282
 283                 public DependencyChangesRequest(ChangeSet parameter) {
 284                         super(parameter);
 285                 }
 286
 287                 @Override
 288                 public DependencyChanges perform(ReadGraph graph) throws DatabaseException {
 289
 290                         DependencyChangesWriter w = new DependencyChangesWriter(graph);
 291                         Layer0 l0 = w.l0;
 292                         Resource changeInformation = graph.getPossibleResource("http://www.simantics.org/Modeling-1.2/changeInformation/Inverse");
 293
 294                         for (Resource value : parameter.changedValues()) {
 295                                 if(!value.isPersistent()) continue;
 296                                 Statement modifiedComponent = graph.getPossibleStatement(value, l0.PropertyOf);
 297                                 if (modifiedComponent == null
 298                                                 || modifiedComponent.getPredicate().equals(changeInformation))
 299                                         continue;
 300                                 if (DEBUG) {
 301                                     LOGGER.info("+comp modi " + NameUtils.getSafeName(graph, modifiedComponent.getObject(), true));
 302                                     LOGGER.info("    +value " + NameUtils.getSafeName(graph, value, true));
 303                                 }
 304                                 w.addComponentModification(modifiedComponent.getObject());
 305                         }
 306                         for (Resource value : parameter.changedResources()) {
 307                                 // No more info => need to check further
 308                                 if(!graph.isImmutable(value))
 309                                         w.addComponentModification(value);
 310                         }
 311                         for (StatementChange change : parameter.changedStatements()) {
 312                             if (DEBUG)
 313                                 LOGGER.info("-stm " + NameUtils.getSafeName(graph, change.getSubject(), true) + " " + NameUtils.getSafeName(graph, change.getPredicate(), true) + " " + NameUtils.getSafeName(graph, change.getObject(), true));
 314                                 Resource subject = change.getSubject();
 315                                 Resource predicate = change.getPredicate();
 316                                 Resource object = change.getObject();
 317                                 if(!object.isPersistent()) continue;
 318                                 if (predicate.equals(l0.ConsistsOf)) {
 319                                         if (change.isClaim())
 320                                                 w.addComponentAddition(subject, object);
 321                                         else
 322                                                 w.addComponentRemoval(subject, object);
 323                                 } else if (predicate.equals(l0.IsLinkedTo)) {
 324                                         w.addLinkChange(subject);
 325                                 } else /*if (graph.isSubrelationOf(predicate, l0.DependsOn))*/ {
 326                                     if (DEBUG)
 327                                         LOGGER.info("-modi " + NameUtils.getSafeName(graph, subject, true));
 328                                         w.addComponentModification(subject);
 329                                 }
 330                         }
 331                         return w.getResult();
 332                 }
 333
 334         };
 335
 336         private static int trackers = 0;
 337
 338         private static ChangeListener listener;
 339
 340         public static void assertFinishedTracking() {
 341             if(trackers != 0) throw new IllegalStateException("Trackers should be 0 (was " + trackers + ")");
 342         }
 343
 344         @Override
 345         public synchronized void untrack(RequestProcessor processor, final Resource model) {
 346
 347             trackers--;
 348
 349             if(trackers < 0) throw new IllegalStateException("Dependency tracking reference count is broken");
 350
 351             if(trackers == 0) {
 352
 353                 if(listener == null) throw new IllegalStateException("Dependency tracking was not active");
 354
 355                 GraphChangeListenerSupport changeSupport = processor.getService(GraphChangeListenerSupport.class);
 356                 changeSupport.removeMetadataListener(listener);
 357                 listener = null;
 358
 359             }
 360
 361         }
 362
 363         @Override
 364         public synchronized void trackAndIndex(RequestProcessor processor, Resource model__) {
 365
 366                 if(trackers == 0) {
 367
 368                         if(listener != null) throw new IllegalStateException("Dependency tracking was active");
 369
 370                         listener = new GenericChangeListener<DependencyChangesRequest, DependencyChanges>() {
 371
 372                                 @Override
 373                                 public boolean preEventRequest() {
 374                                         return !Indexing.isDependenciesIndexingDisabled();
 375                                 }
 376
 377                                 @Override
 378                                 public void onEvent(ReadGraph graph, MetadataI metadata, DependencyChanges event) throws DatabaseException {
 379
 380                                         TimeLogger.log(DependenciesRelation.class, "trackAndIndex.onEvent: starting index update processing");
 381
 382                                         if(DEBUG)
 383                                                 LOGGER.info("Adding metadata " + event + " in revision " + graph.getService(ManagementSupport.class).getHeadRevisionId());
 384
 385                                         WriteGraph w = (WriteGraph)graph;
 386                                         if(!event.isEmpty())
 387                                                 w.addMetadata(event);
 388
 389                                         final Session session = graph.getSession();
 390                                         final IndexedRelations indexer = session.getService(IndexedRelations.class);
 391                                         Layer0 L0 = Layer0.getInstance(graph);
 392                                         SerialisationSupport ss = graph.getService(SerialisationSupport.class);
 393
 394                                         for(Map.Entry<Resource, Change[]>  modelEntry : event.get().entrySet()) {
 395
 396                                                 final Resource model = modelEntry.getKey();
 397                                                 final Change[] changes = modelEntry.getValue();
 398
 399                                                 boolean linkChange = false;
 400
 401                                                 Collection<Object[]> _additions = Collections.emptyList();
 402                                                 Collection<Object> _removals = Collections.emptyList();
 403                                                 Collection<Object> _replacementKeys = Collections.emptyList();
 404                                                 Collection<Object[]> _replacementObjects = Collections.emptyList();
 405                                                 Collection<Pair<String, String>> _typeChanges = Collections.emptyList();
 406
 407                                                 if(DEBUG) LOGGER.info("MODEL: " + NameUtils.getSafeLabel(graph, model));
 408                                                 if (changes != null) {
 409                                                         if (DEBUG) {
 410                                                                 LOGGER.info("  CHANGE COUNT: " + changes.length);
 411                                                                 for (Change c : changes)
 412                                                                         LOGGER.info("    CHANGE: " + c.toString(graph));
 413                                                         }
 414                                                         _additions = new ArrayList<>();
 415                                                         _removals = new ArrayList<>();
 416                                                         _replacementKeys = new ArrayList<>();
 417                                                         _replacementObjects = new ArrayList<>();
 418                                                         _typeChanges = new HashSet<>();
 419
 420                                                         for (Change _entry : changes) {
 421                                                                 if (_entry instanceof ComponentAddition) {
 422                                                                         ComponentAddition entry = (ComponentAddition)_entry;
 423                                                                         final String name = graph.getPossibleRelatedValue(entry.component, L0.HasName, Bindings.STRING);
 424                                                                         Set<Resource> typeSet = graph.getTypes(entry.component);
 425                                                                         if (name != null && typeSet != null) {
 426                                                                                 if (!entry.isValid(graph))
 427                                                                                         continue;
 428                                                                                 Resource parent = graph.getPossibleObject(entry.component, L0.PartOf);
 429                                                                                 if (parent != null) {
 430                                                                                         final GUID id = graph.getPossibleRelatedValue(entry.component, L0.identifier, GUID.BINDING);
 431                                                                                         final String types = graph.syncRequest(new TypeString(L0, typeSet));
 432                                                                                         final String typeIds = IndexQueries.toResourceIdString(typeSet);
 433                                                                                         _additions.add(new Object[] { ss.getRandomAccessId(parent), ss.getRandomAccessId(entry.component), name, types, IndexQueries.idFromGUID(id), name, types, typeIds});
 434                                                                                 } else {
 435                                                                                         //LOGGER.info("resource " + entry.component + ": no parent for entry " + name + " " + types);
 436                                                                                 }
 437                                                                         } else {
 438                                                                                 //LOGGER.info("resource " + entry.component + ": " + name + " " + types);
 439                                                                         }
 440                                                                 } else if(_entry instanceof ComponentModification) {
 441                                                                         ComponentModification entry = (ComponentModification)_entry;
 442                                                                         final String name = graph.getPossibleRelatedValue(entry.component, L0.HasName, Bindings.STRING);
 443                                                                         if(graph.isInstanceOf(entry.component, L0.Type)) {
 444                                                                                 SerialisationSupport support = session.getService(SerialisationSupport.class);
 445                                                                                 _typeChanges.add(new Pair<String, String>(name, String.valueOf(support.getRandomAccessId((Resource) entry.component))));
 446                                                                         } else {
 447                                                                                 Set<Resource> typeSet = graph.getTypes(entry.component);
 448                                                                                 if (name != null && !typeSet.isEmpty()) {
 449                                                                                         Resource part = graph.getPossibleObject(entry.component, L0.PartOf);
 450                                                                                         if(part != null) {
 451                                                                                                 final GUID id = graph.getPossibleRelatedValue(entry.component, L0.identifier, GUID.BINDING);
 452                                                                                                 final String types = graph.syncRequest(new TypeString(L0, typeSet));
 453                                                                                                 final String typeIds = IndexQueries.toResourceIdString(typeSet);
 454                                                                                                 _replacementKeys.add(ss.getRandomAccessId(entry.component));
 455                                                                                                 _replacementObjects.add(new Object[] { ss.getRandomAccessId(part),
 456                                                                                                                 ss.getRandomAccessId(entry.component), name, types, IndexQueries.idFromGUID(id), name, types, typeIds});
 457                                                                                         }
 458                                                                                 }
 459                                                                         }
 460                                                                 } else if (_entry instanceof ComponentRemoval) {
 461                                                                         ComponentRemoval entry = (ComponentRemoval)_entry;
 462                                                                         if(!entry.isValid(graph)) continue;
 463                                                                         _removals.add(ss.getRandomAccessId(((ComponentRemoval)_entry).component));
 464                                                                 } else if (_entry instanceof LinkChange) {
 465                                                                         linkChange = true;
 466                                                                 }
 467                                                         }
 468                                                 }
 469
 470                                                 final boolean reset = linkChange || event.hasUnresolved;
 471                                                 //LOGGER.info("dependencies(" + NameUtils.getSafeLabel(graph, model) + "): reset=" + reset + " linkChange=" + linkChange + " unresolved=" + event.hasUnresolved );
 472
 473                                                 if (reset || !_additions.isEmpty() || !_removals.isEmpty() || !_replacementKeys.isEmpty() || !_typeChanges.isEmpty()) {
 474
 475                                                         TimeLogger.log(DependenciesRelation.class, "trackAndIndex.onEvent: starting index update");
 476
 477                                                         final Collection<Object[]> additions = _additions;
 478                                                         final Collection<Object> removals = _removals;
 479                                                         final Collection<Object> replacementKeys = _replacementKeys;
 480                                                         final Collection<Object[]> replacementObjects = _replacementObjects;
 481                                                         final boolean typeNameChanges = typeNameChanges(graph, indexer, model, _typeChanges);
 482
 483                                                         final UUID pending = Indexing.makeIndexPending();
 484                                                         try {
 485                                                                 boolean didChange = false;
 486                                                                 // Unresolved and linkChanges are not relevant any more
 487                                                                 boolean doReset = typeNameChanges;
 488
 489                                                                 if (doReset) {
 490
 491                                                                         if(DEBUG) {
 492                                                                                 LOGGER.info("resetIndex " + reset + " " + typeNameChanges);
 493                                                                         }
 494
 495                                                                         indexer.removeAll(null, graph, DependenciesRelation.this, resource, model);
 496                                                                         didChange = true;
 497
 498                                                                 } else {
 499
 500                                                                         if (!replacementKeys.isEmpty() && (replacementKeys.size() == replacementObjects.size())) {
 501                                                                                 if(DEBUG) {
 502                                                                                         LOGGER.info(replacementKeys.size() + " index replacements: " + replacementKeys);
 503                                                                                 }
 504                                                                                 didChange |= indexer.replace(null, graph, DependenciesRelation.this, resource, model, Dependencies.FIELD_RESOURCE, replacementKeys, replacementObjects);
 505                                                                         }
 506                                                                         if (!removals.isEmpty()) {
 507                                                                                 if(DEBUG) {
 508                                                                                         LOGGER.info(removals.size() + " index removals: " + removals);
 509                                                                                 }
 510                                                                                 indexer.remove(null, graph, DependenciesRelation.this, resource, model, Dependencies.FIELD_RESOURCE, removals);
 511                                                                                 didChange = true;
 512                                                                         }
 513                                                                         if (!additions.isEmpty()) {
 514                                                                                 if(DEBUG) {
 515                                                                                         for(Object[] os : additions) LOGGER.info("Adding to index " + model + ": " + Arrays.toString(os));
 516                                                                                 }
 517                                                                                 //LOGGER.info(additions.size() + " index insertions");
 518                                                                                 indexer.insert(null, graph, DependenciesRelation.this, resource, model, additions);
 519                                                                                 didChange = true;
 520                                                                         }
 521
 522                                                                 }
 523
 524                                                                 if (didChange)
 525                                                                         // TODO: because this data is ran with
 526                                                                         // ThreadUtils.getBlockingWorkExecutor()
 527                                                                         // fireListeners needs to use peekService,
 528                                                                         // not getService since there is no
 529                                                                         // guarantee that the session isn't being
 530                                                                         // disposed while this method is executing.
 531                                                                         fireListeners(graph, model);
 532
 533                                                         } catch (Throwable t) {
 534                                                                 // Just to know if something unexpected happens here.
 535                                                                 LOGGER.error("Dependencies index update failed for model "
 536                                                                                 + model + " and relation " + resource + ".", t);
 537
 538                                                                 // NOTE: Last resort: failure to update index
 539                                                                 // properly results in removal of the whole index.
 540                                                                 // This is the only thing that can be done
 541                                                                 // at this point to ensure that the index will
 542                                                                 // return correct results in the future, through
 543                                                                 // complete reinitialization.
 544                                                                 //indexer.removeAll(null, session, DependenciesRelation.this, resource, model);
 545                                                         } finally {
 546                                                                 Indexing.releaseIndexPending(pending);
 547                                                                 Indexing.clearCaches(model);
 548                                                         }
 549
 550                                                         TimeLogger.log(DependenciesRelation.class, "trackAndIndex.onEvent: index update done");
 551                                                 }
 552                                         }
 553
 554                                 }
 555
 556                         };
 557
 558                         GraphChangeListenerSupport changeSupport = processor.getService(GraphChangeListenerSupport.class);
 559                         changeSupport.addMetadataListener(listener);
 560
 561                 }
 562
 563                 trackers++;
 564
 565         }
 566
 567         private boolean typeNameChanges(ReadGraph graph, IndexedRelations indexer,
 568                         Resource model, final Collection<Pair<String, String>> typeChanges)
 569                         throws DatabaseException {
 570                 if (typeChanges.isEmpty())
 571                         return false;
 572
 573                 for (Pair<String, String> nr : typeChanges) {
 574                         String query = Dependencies.FIELD_RESOURCE + ":[" + nr.second + " TO " + nr.second + "]";
 575                         //LOGGER.info("query: " + query);
 576                         List<Map<String, Object>> results = indexer.query(null, query, graph, resource, model, Integer.MAX_VALUE);
 577                         if (results.size() != 1) {
 578                                 return true;
 579                         } else {
 580                                 Map<String, Object> result = results.get(0);
 581                                 if (!ObjectUtils.objectEquals(result.get(Dependencies.FIELD_NAME), nr.first)) {
 582                                         return true;
 583                                 }
 584                         }
 585 //                      LOGGER.info("Type " + nr.first + " was unchanged.");
 586                 }
 587                 return false;
 588         }
 589
 590         @Override
 591         public void addListener(RequestProcessor processor, Resource model, Runnable observer) {
 592                 DependenciesListenerStore store = processor.getSession().getService(DependenciesListenerStore.class);
 593                 store.addListener(model, observer);
 594         }
 595
 596         @Override
 597         public void removeListener(RequestProcessor processor, Resource model, Runnable observer) {
 598                 DependenciesListenerStore store = processor.getSession().getService(DependenciesListenerStore.class);
 599                 store.removeListener(model, observer);
 600         }
 601
 602         void fireListeners(RequestProcessor processor, Resource model) {
 603                 DependenciesListenerStore store = processor.getSession().peekService(DependenciesListenerStore.class);
 604                 if (store != null)
 605                         store.fireListeners(model);
 606         }
 607
 608         @Override
 609         public void reset(RequestProcessor processor, Resource input) {
 610                 if (DEBUG) {
 611                         LOGGER.info("DependenciesRelation.reset: " + input);
 612                         new Exception("DependenciesRelation.reset(" + listener + ")").printStackTrace(System.out);
 613                 }
 614                 DependenciesListenerStore store = processor.getSession().getService(DependenciesListenerStore.class);
 615                 store.fireListeners(input);
 616         }
 617
 618         public static void addSubtree(ReadGraph graph, Resource root) throws DatabaseException {
 619
 620                 Resource indexRoot = graph.syncRequest(new IndexRoot(root));
 621                 addSubtree(graph, indexRoot, root);
 622
 623         }
 624
 625         public static void addSubtree(ReadGraph graph, Resource indexRoot, Resource subtreeRoot) throws DatabaseException {
 626
 627                 DependenciesRelation dr = new DependenciesRelation(graph, indexRoot);
 628                 SerialisationSupport ss = graph.getService(SerialisationSupport.class);
 629
 630                 ArrayList<Entry> entries = dr.find(graph, subtreeRoot);
 631                 entries.add(new Entry(graph, subtreeRoot));
 632
 633                 ArrayList<Object[]> result = new ArrayList<Object[]>(entries.size());
 634                 for (Entry entry : entries) {
 635                         result.add(new Object[] { ss.getRandomAccessId(entry.parent), ss.getRandomAccessId(entry.resource), entry.name, entry.types, entry.id, entry.name, entry.types, entry.typeId });
 636                 }
 637
 638                 Layer0X L0X = Layer0X.getInstance(graph);
 639                 IndexedRelations indexer = graph.getService(IndexedRelations.class);
 640                 indexer.insert(null, graph, dr, L0X.DependenciesRelation, indexRoot, result);
 641
 642         }
 643
 644 }