Class JpaOptimisticLockingListener

  • All Implemented Interfaces:
    Serializable, org.hibernate.event.spi.PreDeleteEventListener, org.hibernate.event.spi.PreInsertEventListener, org.hibernate.event.spi.PreUpdateEventListener

    public class JpaOptimisticLockingListener
    extends Object
    implements org.hibernate.event.spi.PreInsertEventListener, org.hibernate.event.spi.PreDeleteEventListener, org.hibernate.event.spi.PreUpdateEventListener
    Listen on changes on child entities and forces an optimistic locking increment on the closest parent aka root. The assumption is that any parent of a child entity is root entity. Optimistic locking is enforced on child entity which is not the child entity at the same time. This prevents OptimisticLockExceptions when different children in the same parent are being manipulated at the same time by different threads. This support a multiple level parent-child relationship, where only the closest parent is locked.
    See Also:
    Serialized Form
    • Constructor Detail

      • JpaOptimisticLockingListener

        public JpaOptimisticLockingListener()
    • Method Detail

      • lockRootEntity

        public void lockRootEntity​(org.hibernate.Session session,
                                   Object entity)
                            throws org.hibernate.HibernateException
        Check if the entity is a child with a parent and force optimistic locking increment on the parent aka root.
      • 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