Examples with KernelException org.neo4j.exceptions.KernelException used on opensource projects

Example 56 with KernelException

use of org.neo4j.exceptions.KernelException in project neo4j by neo4j.

the class RelationshipEntity method removeProperty.

@Override
public Object removeProperty(String key) {
    KernelTransaction transaction = internalTransaction.kernelTransaction();
    int propertyKeyId;
    try {
        propertyKeyId = transaction.tokenWrite().propertyKeyGetOrCreateForName(key);
    } catch (IllegalTokenNameException e) {
        throw new IllegalArgumentException(format("Invalid property key '%s'.", key), e);
    } catch (KernelException e) {
        throw new TransactionFailureException("Unknown error trying to get property key token", e);
    }
    try {
        return transaction.dataWrite().relationshipRemoveProperty(id, propertyKeyId).asObjectCopy();
    } catch (InvalidTransactionTypeKernelException e) {
        throw new ConstraintViolationException(e.getMessage(), e);
    } catch (EntityNotFoundException e) {
        throw new NotFoundException(e);
    }
}

Example 57 with KernelException

use of org.neo4j.exceptions.KernelException in project neo4j by neo4j.

the class TransactionImpl method allNodesWithLabel.

private ResourceIterator<Node> allNodesWithLabel(final Label myLabel) {
    KernelTransaction ktx = kernelTransaction();
    int labelId = ktx.tokenRead().nodeLabel(myLabel.name());
    if (labelId == TokenRead.NO_TOKEN) {
        return emptyResourceIterator();
    }
    var index = findUsableMatchingIndex(ktx, SchemaDescriptor.forAnyEntityTokens(EntityType.NODE));
    if (index != IndexDescriptor.NO_INDEX) {
        try {
            var session = ktx.dataRead().tokenReadSession(index);
            var cursor = ktx.cursors().allocateNodeLabelIndexCursor(ktx.cursorContext());
            ktx.dataRead().nodeLabelScan(session, cursor, unconstrained(), new TokenPredicate(labelId));
            return new CursorIterator<>(cursor, NodeIndexCursor::nodeReference, c -> newNodeEntity(c.nodeReference()), coreApiResourceTracker);
        } catch (KernelException e) {
        // ignore, fallback to all node scan
        }
    }
    return allNodesByLabelWithoutIndex(ktx, labelId);
}

Example 58 with KernelException

use of org.neo4j.exceptions.KernelException in project neo4j by neo4j.

the class IndexWriterStep method createIndex.

private IndexDescriptor createIndex(EntityType entityType, IndexConfig config, SchemaRuleAccess schemaRule, SchemaStore schemaStore, MemoryTracker memoryTracker, CursorContext cursorContext) {
    try {
        IndexProviderDescriptor providerDescriptor = new IndexProviderDescriptor("token-lookup", "1.0");
        IndexPrototype prototype = forSchema(forAnyEntityTokens(entityType)).withIndexType(LOOKUP).withIndexProvider(providerDescriptor);
        String name = defaultIfEmpty(config.indexName(entityType), generateName(prototype, new String[] {}, new String[] {}));
        IndexDescriptor descriptor = prototype.withName(name).materialise(schemaStore.nextId(cursorContext));
        schemaRule.writeSchemaRule(descriptor, cursorContext, memoryTracker);
        return descriptor;
    } catch (KernelException e) {
        throw new RuntimeException("Error preparing indexes", e);
    }
}