获取删除父级后所有已删除实体的ID？

Question

Lets say I have a Parent object that have several children with cascadeType = CascadeType.REMOVE, orphanRemoval = true . Is it possible to collect everything that was deleted when the parent was removed?

If I log all sql queries I could see that multiple deletes is executed. But I no idea how to get all ids back.

Answer 1

You can use @PreRemove which will be called whenever you try to remove an Entity.

I have used this for Audit purpose to keep track of Removed Records.

@Entity
public class Actor extends AbstractBusinessObject{

    @ManyToMany(mappedBy = "cast")
    private Set<Movie> movies;

    // setters and getters

    @PreRemove
    private void removeActorFromMovies() {
        //Executed before the entity manager remove operation is actually 
        // executed or cascaded. This call is synchronous with the remove operation.

    }

}