com.bigdata.gom.om

Interface INativeTransaction

All Known Subinterfaces:

IObjectManager

All Known Implementing Classes:

NanoSparqlObjectManager, ObjectManager, ObjectMgrModel

public interface INativeTransaction

This interface defines a protocol for native transactions. Native transactions may be used to buffering updates and perform an implicit commit when the transaction counter reaches zero. Operations outside of a transaction context are NOT buffered and are immediately committed.

Author:

thompsonbry

Method Summary

Methods

Modifier and Type	Method and Description
int	beginNativeTransaction() Increments the native transaction counter.
int	commitNativeTransaction(int expectedCounter) The native transaction is committed when the counter reaches zero.
int	getNativeTransactionCounter() The current value of the native transaction counter.
void	rollbackNativeTransaction() Rollback all changes since the last time the native transaction counter was zero.

Method Detail

beginNativeTransaction

int beginNativeTransaction()

Increments the native transaction counter. When this counter reaches zero, the transaction will be committed.

Returns:

The new value of the native transaction counter, i.e., after it was incremented.

commitNativeTransaction

int commitNativeTransaction(int expectedCounter)

The native transaction is committed when the counter reaches zero. This method accepts the value returned by beginNativeTransaction() and throws an exception if expectedCounter is not equal to the internal counter. This provides an eager search for un-matched native transactions.

Returns:

The value of the counter after it has been decremented. If the returned value is zero, then the native transaction was committed.

Throws:

if - the expectedCounter is not equal to the internal counter before the latter is decremented.

rollbackNativeTransaction

void rollbackNativeTransaction()

Rollback all changes since the last time the native transaction counter was zero.

getNativeTransactionCounter

int getNativeTransactionCounter()

The current value of the native transaction counter.