Package com.qfs.multiversion

Interface ITransactionalMultiVersion

All Superinterfaces:

IMultiVersion, IMultiVersionOperations

All Known Subinterfaces:

IAsyncTransactionalMultiVersion, IMultiVersionActivePivot, IMultiVersionAggregateProvider, IMultiVersionAggregateProviderHolder, IMultiVersionAxisHierarchy, IMultiVersionConcreteReference, IMultiVersionCube, IMultiVersionDataActivePivot, IMultiVersionDistributedActivePivot, IMultiVersionDistributedAxisHierarchy, IMultiVersionDistributedHierarchy, IMultiVersionDistributedMeasureHierarchy, IMultiVersionGlobalAggregateProvider, IMultiVersionHierarchy, IMultiVersionIndex, IMultiVersionIntegerArray, IMultiVersionLongArray, IMultiVersionMeasureHierarchy, IMultiVersionRecordIndex, IMultiVersionRecordSet, IMultiVersionSecondaryRecordIndex, IMultiVersionStore, IMultiVersionStorePartition, IMultiVersionUniqueRecordIndex

All Known Implementing Classes:

AAnalysisHierarchy, AAnalysisHierarchyV2, AAsyncTransactionalMultiVersion, ABucketHierarchy, AMultiVersionAggregateProvider, AMultiVersionAnalysisHierarchy, AMultiVersionAxisHierarchy, AMultiVersionConcreteReference, AMultiVersionGlobalAggregateProvider, AMultiVersionIndexedAggregateProvider, AMultiVersionPartitionedAggregateProvider, AMultiVersionPartitionedIndexedAggregateProvider, AMultiVersionSecondaryRecordIndex, AMultiVersionUniqueRecordIndex, ATransactionalMultiVersion, CalculatedMemberTrivialAnalysisHierarchy, DistributedAggregateProvider, DistributedMultiVersionAggregateProviderHolder, DummyAggregateProvider, MultiVersionActivePivot, MultiVersionAggregateProviderHolder, MultiVersionAxisHierarchy, MultiVersionBitmapAggregateProvider, MultiVersionColumnarRecordSet, MultiVersionCompositeSecondaryRecordIndex, MultiVersionCompositeUniqueRecordIndex, MultiVersionCube, MultiVersionDataActivePivot, MultiVersionDistributedActivePivot, MultiVersionDistributedAxisHierarchy, MultiVersionDistributedMeasureHierarchy, MultiVersionIntegerArray, MultiVersionLazyDeleteLinkedIndex, MultiVersionLeafAggregateProvider, MultiVersionLongArray, MultiVersionMeasureHierarchy, MultiVersionNoIndexConcreteReference, MultiVersionPartitionedBitmapAggregateProvider, MultiVersionPartitionedLeafAggregateProvider, MultiVersionSecondaryConcreteReference, MultiVersionSecondaryRecordIndex, MultiVersionStore, MultiVersionStorePartition, MultiVersionUniqueConcreteReference, MultiVersionUniqueRecordIndex, TimeBucketHierarchy

public interface ITransactionalMultiVersion
extends IMultiVersion, IMultiVersionOperations

Interface of a multiversion component.

Exposes and maintains several concurrent versions of one underlying component, each of those versions is uniquely associated to the epoch that created it.

Multiversion components may allow modifications of the underlying component, those modifications are considered pending and invisible until they are committed. When the changes are committed, a new version of the underlying component is created.

Author:

ActiveViam

Method Summary

Modifier and Type	Method	Description
ITransaction	getOrCreateTransaction()	Returns the current transaction. The result is never null contrary to getTransaction().
ITransaction	getTransaction()	Returns the current transaction.
void	rollback()	Rolls back the changes that have been written in the transient state.

Methods inherited from interface com.qfs.multiversion.IMultiVersion

getMostRecentVersion

Methods inherited from interface com.qfs.multiversion.IMultiVersionOperations

commit

Method Details

getTransaction

ITransaction getTransaction()

Returns the current transaction.

Returns:

the current transaction or null when there is no transaction

See Also:

• getOrCreateTransaction()

getOrCreateTransaction

ITransaction getOrCreateTransaction()

Returns the current transaction.
The result is never null contrary to getTransaction().

THIS METHOD SHOULD BE CALLED ONLY IF IMultiVersionOperations.commit(IEpoch) (or rollback()) IS GUARANTEED TO BE CALLED otherwise this could cause a memory leak if the transaction holds a version (because the multiversion will keep the transaction).

Returns:

the current transaction

See Also:

• getTransaction()

rollback

void rollback()

Rolls back the changes that have been written in the transient state.

Thread-safety: unless specific otherwise by the implementing class, it is not thread-safe to call IMultiVersionOperations.commit(IEpoch) and IMultiVersionOperations.rollback() concurrently.

After this call getTransaction(), should return null.

Specified by:

rollback in interface IMultiVersionOperations

See Also:

• getOrCreateTransaction()