private static void AssertOnNodeCounts(int expectedTotalNodes, int expectedLabelledNodes, Label label, HighlyAvailableGraphDatabase db)
{
using (Transaction ignored = Db.beginTx())
{
KernelTransaction transaction = KernelTransaction(db);
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final int labelId = transaction.tokenRead().nodeLabel(label.name());
int labelId = transaction.TokenRead().nodeLabel(label.Name());
assertEquals(expectedTotalNodes, transaction.DataRead().countsForNode(-1));
assertEquals(expectedLabelledNodes, transaction.DataRead().countsForNode(labelId));
}
}
/// <param name="start"> the label of the start node of relationships to get the number of, or {@code null} for "any". </param>
/// <param name="type"> the type of the relationships to get the number of, or {@code null} for "any". </param>
/// <param name="end"> the label of the end node of relationships to get the number of, or {@code null} for "any". </param>
private long CountsForRelationship(Label start, RelationshipType type, Label end)
{
KernelTransaction ktx = _ktxSupplier.get();
using (Statement ignore = ktx.AcquireStatement())
{
TokenRead tokenRead = ktx.TokenRead();
int startId;
int typeId;
int endId;
// start
if (start == null)
{
startId = [email protected]_Fields.ANY_LABEL;
}
else
{
if ([email protected]_Fields.NO_TOKEN == (startId = tokenRead.NodeLabel(start.Name())))
{
return(0);
}
}
// type
if (type == null)
{
typeId = [email protected]_Fields.ANY_RELATIONSHIP_TYPE;
}
else
{
if ([email protected]_Fields.NO_TOKEN == (typeId = tokenRead.RelationshipType(type.Name())))
{
return(0);
}
}
// end
if (end == null)
{
endId = [email protected]_Fields.ANY_LABEL;
}
else
{
if ([email protected]_Fields.NO_TOKEN == (endId = tokenRead.NodeLabel(end.Name())))
{
return(0);
}
}
return(ktx.DataRead().countsForRelationship(startId, typeId, endId));
}
}
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
//ORIGINAL LINE: private static void lockNodeUsingUniqueIndexSeek(org.neo4j.kernel.internal.GraphDatabaseAPI database, org.neo4j.graphdb.Label label, String nameProperty) throws org.neo4j.internal.kernel.api.exceptions.KernelException
private static void LockNodeUsingUniqueIndexSeek(GraphDatabaseAPI database, Label label, string nameProperty)
{
using (Transaction transaction = database.BeginTx())
{
ThreadToStatementContextBridge contextBridge = database.DependencyResolver.resolveDependency(typeof(ThreadToStatementContextBridge));
KernelTransaction kernelTransaction = contextBridge.GetKernelTransactionBoundToThisThread(true);
TokenRead tokenRead = kernelTransaction.TokenRead();
Read dataRead = kernelTransaction.DataRead();
int labelId = tokenRead.NodeLabel(label.Name());
int propertyId = tokenRead.PropertyKey(nameProperty);
IndexReference indexReference = kernelTransaction.SchemaRead().index(labelId, propertyId);
dataRead.LockingNodeUniqueIndexSeek(indexReference, IndexQuery.ExactPredicate.exact(propertyId, "value"));
transaction.Success();
}
}
/// <param name="label"> the label to get the number of nodes of, or {@code null} to get the total number of nodes. </param>
private long CountsForNode(Label label)
{
KernelTransaction transaction = _transactionSupplier.get();
Read read = transaction.DataRead();
int labelId;
if (label == null)
{
labelId = StatementConstants.ANY_LABEL;
}
else
{
if ([email protected]_Fields.NO_TOKEN == (labelId = transaction.TokenRead().nodeLabel(label.Name())))
{
return(0);
}
}
return(read.CountsForNode(labelId));
}
//JAVA TO C# CONVERTER TODO TASK: Most Java annotations will not have direct .NET equivalent attributes:
//ORIGINAL LINE: @Test public void shouldNotAllowConcurrentViolationOfConstraint() throws Exception
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
public virtual void ShouldNotAllowConcurrentViolationOfConstraint()
{
// Given
GraphDatabaseAPI graphDb = Db.GraphDatabaseAPI;
System.Func <KernelTransaction> ktxSupplier = () => graphDb.DependencyResolver.resolveDependency(typeof(ThreadToStatementContextBridge)).getKernelTransactionBoundToThisThread(true);
Label label = label("Foo");
string propertyKey = "bar";
string conflictingValue = "baz";
// a constraint
using (Transaction tx = graphDb.BeginTx())
{
graphDb.Schema().constraintFor(label).assertPropertyIsUnique(propertyKey).create();
tx.Success();
}
// When
using (Transaction tx = graphDb.BeginTx())
{
KernelTransaction ktx = ktxSupplier();
int labelId = ktx.TokenRead().nodeLabel(label.Name());
int propertyKeyId = ktx.TokenRead().propertyKey(propertyKey);
IndexDescriptor index = TestIndexDescriptorFactory.uniqueForLabel(labelId, propertyKeyId);
Read read = ktx.DataRead();
using (NodeValueIndexCursor cursor = ktx.Cursors().allocateNodeValueIndexCursor())
{
read.NodeIndexSeek(ktx.SchemaRead().index(labelId, propertyKeyId), cursor, IndexOrder.NONE, false, IndexQuery.exact(index.Schema().PropertyId, "The value is irrelevant, we just want to perform some sort of lookup against this " + "index"));
}
// then let another thread come in and create a node
Threads.execute(Db =>
{
using (Transaction transaction = Db.beginTx())
{
Db.createNode(label).setProperty(propertyKey, conflictingValue);
transaction.success();
}
return(null);
}, graphDb).get();
// before we create a node with the same property ourselves - using the same statement that we have
// already used for lookup against that very same index
long node = ktx.DataWrite().nodeCreate();
ktx.DataWrite().nodeAddLabel(node, labelId);
try
{
ktx.DataWrite().nodeSetProperty(node, propertyKeyId, Values.of(conflictingValue));
fail("exception expected");
}
// Then
catch (UniquePropertyValueValidationException e)
{
assertEquals(ConstraintDescriptorFactory.uniqueForLabel(labelId, propertyKeyId), e.Constraint());
IndexEntryConflictException conflict = Iterators.single(e.Conflicts().GetEnumerator());
assertEquals(Values.stringValue(conflictingValue), conflict.SinglePropertyValue);
}
tx.Success();
}
}
