Package org.keycloak.models.map.storage.jpa.hibernate.listeners

Class JpaEntityVersionListener

java.lang.Object

org.keycloak.models.map.storage.jpa.hibernate.listeners.JpaEntityVersionListener

All Implemented Interfaces:

org.hibernate.event.spi.PreDeleteEventListener, org.hibernate.event.spi.PreInsertEventListener, org.hibernate.event.spi.PreUpdateEventListener

public class JpaEntityVersionListener
extends Object
implements org.hibernate.event.spi.PreInsertEventListener, org.hibernate.event.spi.PreDeleteEventListener, org.hibernate.event.spi.PreUpdateEventListener

Listen on changes on child- and root entities and updates the current entity version of the root. This support a multiple level parent-child relationship, where all parents needs the entity version to be updated in case it was effectively changed. The traversing is stopped at that point when it is detected that parent entity version is the same one. It is based on an assumption that it may happen that one parent entity could be extracted into "parent A -> parent B -> child" format. Then the change (insertion, deletion or update) of the child should bump the entity version of both parent B and parent A.

Field Summary

Fields

Modifier and Type	Field	Description
static final JpaEntityVersionListener	INSTANCE

Constructor Summary

Constructors

Constructor	Description
JpaEntityVersionListener()

Method Summary

Modifier and Type	Method	Description
boolean	onPreDelete(org.hibernate.event.spi.PreDeleteEvent event)
boolean	onPreInsert(org.hibernate.event.spi.PreInsertEvent event)
boolean	onPreUpdate(org.hibernate.event.spi.PreUpdateEvent event)
void	updateEntityVersion(Object entity)	Traverse from current entity through its parent tree and update the entity version of it.

Methods inherited from class java.lang.Object

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

Field Details

INSTANCE

public static final JpaEntityVersionListener INSTANCE

Constructor Details

JpaEntityVersionListener

public JpaEntityVersionListener()

Method Details

updateEntityVersion

public void updateEntityVersion(Object entity)
                         throws org.hibernate.HibernateException

Traverse from current entity through its parent tree and update the entity version of it. Stop if non-changed parent is found.

Throws:

org.hibernate.HibernateException

onPreInsert

public boolean onPreInsert(org.hibernate.event.spi.PreInsertEvent event)

Specified by:

onPreInsert in interface org.hibernate.event.spi.PreInsertEventListener

onPreDelete

public boolean onPreDelete(org.hibernate.event.spi.PreDeleteEvent event)

Specified by:

onPreDelete in interface org.hibernate.event.spi.PreDeleteEventListener

onPreUpdate

public boolean onPreUpdate(org.hibernate.event.spi.PreUpdateEvent event)

Specified by:

onPreUpdate in interface org.hibernate.event.spi.PreUpdateEventListener