Writing changes to DB while still at transaction - how?

[alex_krasov]

Hi.

I've got a problem that I still can't solve while putting too much effort for it, so may be you can help :)

My component have 3 methods: start(), proceed() and finish();

start() annotated as @Begin, finish() annotated as @End. Both are @Transactional
They do stuff with JPA such as creating a new entities and updating existing ones.
Changes are actually written to DB on transaction commit, i.e. when finish() ends.
Till now everything good.

Now I have a requirement that in some case while at proceed(), my entity will be immediately persisted to db no matter what when running entityManager.persist
How can I do it? Manually executing entityManager.flush() doesn't helps at all, playing with its FlushMode doesn't helps either.
Is it possible to begin some kind of nested isolated transaction before persisting and commit it after persisting?

Thanks a lot,
Alex.

[swd847]

Are you in a ejb environment? If so the easiest way is to the work that you need to commit immediatly in a ejb3 SLSB with a method annotatated @TransactionAttribute(REQUIRES_NEW)

[alex_krasov]

I'm in JBOSS5. Using seam managed session factory. Should it still work?

10x.

[alex_krasov]

BTW: I've tried to put this annotation on my saving method, it doesn't makes any difference.
I'd also mention that my component is not a slsb, it's defined as a @Scope(ScopeType.APPLICATION) for what it matters...

Isn't there a seam way to perform nested transaction?

[gonorrhea]

Have you looked at using BMT?  Handling the begin/commit of the tx yourself but not sure if it's possible w/o EJB unless you use Hibernate API...