Transactional CDI bean: How to force transaction rollback

Question

I have a @RequestScoped, @Transactional CDI bean injected in my REST interface:

@RequestScoped
@Transactional
public class myRestCall
{
    @Inject
    EntityHandlerService    ehs;        // contains @PersistenceContext

    try
    {
       // execute business logic, access DB via ehs (JPA / Hibernate)
    }
    catch(Throwable t)
    {
        // log exception
        // -> rollback transaction
    }
}

Now I like to have a try / catch around the call of the business logic that I can log the exception properly. But I need to rollback the transaction manually, unless I throw the exception again what I do not like. So how can I force the transasction rollback here? I know how to do it, if it would be a EJB: We could do

@Resource
private SessionContext ctx;

and then

ctx.setRollbackOnly();

in the catch close.

However, it is not an EJB and I cannot make an EJB out of it due to resource limits.

AndrewSchmidt AndrewSchmidt · Accepted Answer · 2019-03-27T16:00:06

In case anyone is still looking for an answer, you can add the @Resource TransactionSynchronizationRegistry and then call setRollbackOnly();

@RequestScoped
class MyBean {
    @Resource
    private TransactionSynchronizationRegistry reg;

    @Transactional
    void yourmethod()
    {
        try {
             // do stuff

        } catch (Exception e) {
             reg.setRollbackOnly();       
        }

    }
}

If you can't use @Resource, you can lookup the trx resgistry with jndi:

java:comp/TransactionSynchronizationRegistry

Transactional CDI bean: How to force transaction rollback

2 Answers