io.hypersistence.optimizer.hibernate.event.mapping.association

Class SqlServerForeignKeyLockingEvent

java.lang.Object

io.hypersistence.optimizer.core.event.AbstractEvent

io.hypersistence.optimizer.hibernate.event.mapping.EntityMappingEvent

io.hypersistence.optimizer.hibernate.event.mapping.association.SqlServerForeignKeyLockingEvent

All Implemented Interfaces:

Event, Serializable

public class SqlServerForeignKeyLockingEvent
extends EntityMappingEvent

The SqlServerForeignKeyLockingEvent indicates that an entity contains ManyToOne associations or non-shared OneToOne associations, without the entity being configured to use DynamicUpdate. By default, Hibernate includes all non-id entity columns in the SET clause of an UPDATE statement, and, for this reason, on SQL Server, a shared lock is acquired on the parent table record to ensure that the Foreign Key is not going to reference a non-existing parent row. So, to reduce the likelihood of locking and deadlocks, you are better off setting DynamicUpdate on such entities.

Since:

2.4.0

Author:

Vlad Mihalcea

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface io.hypersistence.optimizer.core.event.Event

Event.Priority

Constructor Summary

Constructors

Constructor and Description
SqlServerForeignKeyLockingEvent(Class entityClass, int manyToOneAssociationCount, int oneToOneAssociationCount) Instantiate the event using the provided parameters.

Method Summary

Modifier and Type	Method and Description
String	getDescription() Get the String description of this Event
int	getManyToOneAssociationCount() Get the number of many-to-one associations that can be affected by the Foreign Key locking issue.
int	getOneToOneAssociationCount() Get the number of one-to-one associations that can be affected by the Foreign Key locking issue.
Event.Priority	getPriority() Get the Event.Priority of this Event

Methods inherited from class io.hypersistence.optimizer.hibernate.event.mapping.EntityMappingEvent

getEntityClass, getEntityName

Methods inherited from class io.hypersistence.optimizer.core.event.AbstractEvent

getInfoUrl

Methods inherited from class java.lang.Object

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

Constructor Detail

SqlServerForeignKeyLockingEvent

public SqlServerForeignKeyLockingEvent(Class entityClass,
                                       int manyToOneAssociationCount,
                                       int oneToOneAssociationCount)

Instantiate the event using the provided parameters.

Parameters:

entityClass - entity class

manyToOneAssociationCount - many-to-one associations that can be affected by the Foreign Key locking issue

oneToOneAssociationCount - one-to-one associations that can be affected by the Foreign Key locking issue

Method Detail

getManyToOneAssociationCount

public int getManyToOneAssociationCount()

Get the number of many-to-one associations that can be affected by the Foreign Key locking issue.

Returns:

the number many-to-one associations that can be affected by the Foreign Key locking issue

getOneToOneAssociationCount

public int getOneToOneAssociationCount()

Get the number of one-to-one associations that can be affected by the Foreign Key locking issue.

Returns:

the number one-to-one associations that can be affected by the Foreign Key locking issue

getPriority

public Event.Priority getPriority()

Get the Event.Priority of this Event

Returns:

the Event.Priority of this Event

getDescription

public String getDescription()

Get the String description of this Event

Returns:

the String description of this Event