How to get old entity value in @HandleBeforeSave event to determine if a property is changed or not?

Question

I\'m trying to get the old entity in a @HandleBeforeSave event.

@Component
@RepositoryEventHandler(Customer.class)
public class CustomerEventHan         


        

Answer 1

The following worked for me. Without starting a new thread the hibernate session will provide the already updated version. Starting another thread is a way to have a separate JPA session.

@PreUpdate

Thread.start {
    if (entity instanceof MyEntity) {
        entity.previous = myEntityCrudRepository.findById(entity?.id).get()
    }
}.join()

Just let me know if anybody would like more context.