Examples with IndexDescriptor org.neo4j.internal.schema.IndexDescriptor used on opensource projects

Example 21 with IndexDescriptor

use of org.neo4j.internal.schema.IndexDescriptor in project neo4j by neo4j.

the class Operations method enforceNodeKeyConstraint.

private void enforceNodeKeyConstraint(SchemaDescriptor schema) throws KernelException {
    IndexDescriptor index = allStoreHolder.findUsableTokenIndex(NODE);
    if (index != IndexDescriptor.NO_INDEX) {
        try (var cursor = cursors.allocateFullAccessNodeLabelIndexCursor(ktx.cursorContext())) {
            var session = allStoreHolder.tokenReadSession(index);
            allStoreHolder.nodeLabelScan(session, cursor, unconstrained(), new TokenPredicate(schema.getLabelId()));
            constraintSemantics.validateNodeKeyConstraint(cursor, nodeCursor, propertyCursor, schema.asLabelSchemaDescriptor(), token);
        }
    } else {
        try (var cursor = cursors.allocateFullAccessNodeCursor(ktx.cursorContext())) {
            allStoreHolder.allNodesScan(cursor);
            constraintSemantics.validateNodeKeyConstraint(new FilteringNodeCursorWrapper(cursor, CursorPredicates.hasLabel(schema.getLabelId())), propertyCursor, schema.asLabelSchemaDescriptor(), token);
        }
    }
}

Example 22 with IndexDescriptor

use of org.neo4j.internal.schema.IndexDescriptor in project neo4j by neo4j.

the class Operations method validateNoExistingNodeWithExactValues.

/**
 * Check so that there is not an existing node with the exact match of label and property
 */
private void validateNoExistingNodeWithExactValues(IndexBackedConstraintDescriptor constraint, PropertyIndexQuery.ExactPredicate[] propertyValues, long modifiedNode) throws UniquePropertyValueValidationException, UnableToValidateConstraintException {
    IndexDescriptor index = allStoreHolder.indexGetForName(constraint.getName());
    try (FullAccessNodeValueIndexCursor valueCursor = cursors.allocateFullAccessNodeValueIndexCursor(ktx.cursorContext(), memoryTracker);
        IndexReaders indexReaders = new IndexReaders(index, allStoreHolder)) {
        assertIndexOnline(index);
        SchemaDescriptor schema = index.schema();
        long[] labelIds = schema.lockingKeys();
        if (labelIds.length != 1) {
            throw new UnableToValidateConstraintException(constraint, new AssertionError(format("Constraint indexes are not expected to be multi-token indexes, " + "but the constraint %s was referencing an index with the following schema: %s.", constraint.userDescription(token), schema.userDescription(token))), token);
        }
        // Take a big fat lock, and check for existing node in index
        ktx.lockClient().acquireExclusive(ktx.lockTracer(), INDEX_ENTRY, indexEntryResourceId(labelIds[0], propertyValues));
        allStoreHolder.nodeIndexSeekWithFreshIndexReader(valueCursor, indexReaders.createReader(), propertyValues);
        if (valueCursor.next() && valueCursor.nodeReference() != modifiedNode) {
            throw new UniquePropertyValueValidationException(constraint, VALIDATION, new IndexEntryConflictException(valueCursor.nodeReference(), NO_SUCH_NODE, PropertyIndexQuery.asValueTuple(propertyValues)), token);
        }
    } catch (IndexNotFoundKernelException | IndexBrokenKernelException | IndexNotApplicableKernelException e) {
        throw new UnableToValidateConstraintException(constraint, e, token);
    }
}

Example 23 with IndexDescriptor

use of org.neo4j.internal.schema.IndexDescriptor in project neo4j by neo4j.

the class Operations method constraintDrop.

@Override
public void constraintDrop(ConstraintDescriptor constraint) throws SchemaKernelException {
    // Lock
    SchemaDescriptor schema = constraint.schema();
    exclusiveLock(schema.keyType(), schema.lockingKeys());
    exclusiveSchemaNameLock(constraint.getName());
    ktx.assertOpen();
    // verify data integrity
    try {
        assertConstraintExists(constraint);
    } catch (NoSuchConstraintException e) {
        throw new DropConstraintFailureException(constraint, e);
    }
    // Drop it like it's hot
    TransactionState txState = ktx.txState();
    txState.constraintDoDrop(constraint);
    if (constraint.enforcesUniqueness()) {
        IndexDescriptor index = allStoreHolder.indexGetForName(constraint.getName());
        if (index != IndexDescriptor.NO_INDEX) {
            txState.indexDoDrop(index);
        }
    }
}

Example 24 with IndexDescriptor

use of org.neo4j.internal.schema.IndexDescriptor in project neo4j by neo4j.

the class Read method nodeLabelScan.

@Override
public final Scan<NodeLabelIndexCursor> nodeLabelScan(int label) {
    ktx.assertOpen();
    CursorContext cursorContext = ktx.cursorContext();
    TokenScan tokenScan;
    try {
        Iterator<IndexDescriptor> index = index(SchemaDescriptor.forAnyEntityTokens(EntityType.NODE));
        if (!index.hasNext()) {
            throw new IndexNotFoundKernelException("There is no index that can back a node label scan.");
        }
        IndexDescriptor nliDescriptor = index.next();
        DefaultTokenReadSession session = (DefaultTokenReadSession) tokenReadSession(nliDescriptor);
        tokenScan = session.reader.entityTokenScan(label, cursorContext);
    } catch (IndexNotFoundKernelException e) {
        throw new RuntimeException(e);
    }
    return new NodeLabelIndexCursorScan(this, label, tokenScan, cursorContext);
}

Example 25 with IndexDescriptor

use of org.neo4j.internal.schema.IndexDescriptor in project neo4j by neo4j.

the class OnlineIndexUpdates method eagerlyGatherTokenIndexUpdates.

private void eagerlyGatherTokenIndexUpdates(EntityUpdates entityUpdates, EntityType entityType, long txId) {
    IndexDescriptor relatedToken = schemaCache.getTokenIndex(entityType);
    entityUpdates.tokenUpdateForIndexKey(relatedToken, txId).ifPresent(updates::add);
}