org.ovirt.engine.core.bll.context

Class NoOpCompensationContext

java.lang.Object

org.ovirt.engine.core.bll.context.NoOpCompensationContext

All Implemented Interfaces:

CompensationContext

public class NoOpCompensationContext
extends Object
implements CompensationContext

An implementation of COmpensation Context that does nothing - will be used by commands that do not implement compensation.

Constructor Summary

Constructors

Constructor and Description
NoOpCompensationContext()

Method Summary

Methods

Modifier and Type	Method and Description
void	resetCompensation() Signify that the command does not need the compensation data which has been recorded up to this point, and if an error occurs after this point then compensation will handle only the entities which were snapshot after this point.
void	snapshotEntity(BusinessEntity<?> entity) Save a snapshot of the entire entity before it is changed/deleted in the DB, so that it can be restored later on in case of compensation.
void	snapshotEntityStatus(BusinessEntity<?> entity, Enum<?> status) Snapshot the entity status only, so that in case of compensation for the entity, the status will be updated to it's original value.
void	snapshotNewEntity(BusinessEntity<?> entity) Save a snapshot of a new entity that was added to the DB, so that if there's need for compensation it will be deleted from the DB.
void	stateChanged() Signify that the command state had changed and the transaction is about to end, so that the snapshots can be saved to the DB (in order to reduce lock time on the compensations table).

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

NoOpCompensationContext

public NoOpCompensationContext()

Method Detail

snapshotEntity

public void snapshotEntity(BusinessEntity<?> entity)

Description copied from interface: CompensationContext

Save a snapshot of the entire entity before it is changed/deleted in the DB, so that it can be restored later on in case of compensation.

Specified by:

snapshotEntity in interface CompensationContext

Parameters:

entity - The entity state before the change.

snapshotNewEntity

public void snapshotNewEntity(BusinessEntity<?> entity)

Description copied from interface: CompensationContext

Save a snapshot of a new entity that was added to the DB, so that if there's need for compensation it will be deleted from the DB.

Specified by:

snapshotNewEntity in interface CompensationContext

Parameters:

entity - The new entity which was added.

snapshotEntityStatus

public void snapshotEntityStatus(BusinessEntity<?> entity,
                        Enum<?> status)

Description copied from interface: CompensationContext

Snapshot the entity status only, so that in case of compensation for the entity, the status will be updated to it's original value.

Specified by:

snapshotEntityStatus in interface CompensationContext

Parameters:

entity - The entity for which to save the status snapshot.

status - The status to snapshot.

stateChanged

public void stateChanged()

Description copied from interface: CompensationContext

Signify that the command state had changed and the transaction is about to end, so that the snapshots can be saved to the DB (in order to reduce lock time on the compensations table).

Specified by:

stateChanged in interface CompensationContext

resetCompensation

public void resetCompensation()

Description copied from interface: CompensationContext

Signify that the command does not need the compensation data which has been recorded up to this point, and if an error occurs after this point then compensation will handle only the entities which were snapshot after this point.

Specified by:

resetCompensation in interface CompensationContext