org.ovirt.engine.core.bll.context

Class DefaultCompensationContext

java.lang.Object

org.ovirt.engine.core.bll.context.DefaultCompensationContext

All Implemented Interfaces:

CompensationContext

public class DefaultCompensationContext
extends Object
implements CompensationContext

Default context used to track entities that are changing during a command's execution and save the changes at each state change to the DB.

Constructor Summary

Constructors

Constructor and Description
DefaultCompensationContext()

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	setBusinessEntitySnapshotDAO(BusinessEntitySnapshotDAO businessEntitySnapshotDAO)
void	setCommandId(Guid commandId)
void	setCommandType(String commandType)
void	setSnapshotSerializer(Serializer snapshotSerializer)
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

DefaultCompensationContext

public DefaultCompensationContext()

Method Detail

setSnapshotSerializer

public void setSnapshotSerializer(Serializer snapshotSerializer)

Parameters:

snapshotSerializer - the snapshotSerializer to set

setBusinessEntitySnapshotDAO

public void setBusinessEntitySnapshotDAO(BusinessEntitySnapshotDAO businessEntitySnapshotDAO)

Parameters:

businessEntitySnapshotDAO - the businessEntitySnapshotDAO to set

setCommandId

public void setCommandId(Guid commandId)

Parameters:

commandId - the commandId to set

setCommandType

public void setCommandType(String commandType)

Parameters:

commandType - the commandType to set

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