Proper Hibernate nested transactions handling

Question

I am sure that I am missing something, but I don't know exactly what...

Giving the following snippet:

@Service
public class MyClass {
    private MyClass self;
    private UserRepository userRepository;
    private ApplicationContext applicationContext;

    @PostConstruct
    private void init() {
        self = applicationContext.getBean(MyClass.class);
    }

    @Transactional
    public void doA(User user) {
        ...
        if (condition) {
            self.doB(user);
            throw new SecurityException();
        }
        user.setRandomField("x");
        userRepository.save(user);
    }

    @Transactional(value = Transactional.TxType.REQUIRES_NEW)
    public void doB(User user) {
        ...
        userRepository.save(user);
    }
}

What do I know about @Transactional is that if it is used, is redundant to call repository.save(entity).

What I am trying to do, is to process an entity from a transactional method, and if there is a breaking condition, call a new method (annotated with REQUIRES_NEW) that will update some fields of the entity and save it. The root method (doA) then throws an exception. FYI: the @Transactional(dontRollbackOn = SecurityException.class) is not an option in this situation.

For using this commiting mechanism, instead of creating a new bean just with one method I just injected the current bean into a variable just called self, therefore I can use the bean proxy for transaction management.

The odd thing is that if I am removing from doB the save call, when doA transaction is rollbacked because of the SecurityException, the changes performed by doB are rollbacked as well. But if I let it in there, this is working as expected.

Am I doing something wrong or am I missing something?

Thanks!

Answer 1

Try to do not pass User instance in the doB(). Pass an Id instead and read the User from the repo internally. I am not sure how the attached entity is handled between the different sessions.