Callbacks on Entity Classes
You can have an entity bean instance register for a callback on any of these life cycle events by annotating a public, private, protected, or package-protected method on the bean class. This method must return void
, throw no checked exceptions, and have no arguments.
@Entity
public class Cabin {
...
@PostPersist void afterInsert( ) {
...
}
@PostLoad void afterLoading( ) {
...
}
}
When an event is triggered on a particular managed entity instance, the entity manager will invoke the appropriate annotated method on the xsentity bean class.
If you are annotation-averse, you can hook into these events by using the <pre-persist>, <post-persist>, <pre-update>, <post-update>, <pre-remove>, <post-remove>, and <post-load> subelements of <entity> in the ORM mapping deployment descriptor:
<entity class="com.titan.domain.Cabin">
<post-persist name="afterInsert"/>
<post-load name="afterLoading"/>
</entity>
These subelements have one attribute called name that takes the name of the method you want to invoke when the callback event happens.
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