Comments on: Co-existence with Hibernate, JPA, and EJB3 http://bill.burkecentral.com/2007/07/06/co-existence-with-hibernate-jpa-and-ejb3/ Software plumbing using middleware wrenches Thu, 09 Feb 2012 19:51:59 +0000 hourly 1 http://wordpress.com/ By: seetharam http://bill.burkecentral.com/2007/07/06/co-existence-with-hibernate-jpa-and-ejb3/#comment-4490 Tue, 06 Dec 2011 17:03:17 +0000 http://billburke.wordpress.com/2007/07/06/co-existence-with-hibernate-jpa-and-ejb3/#comment-4490 hi… greetings…
its good.. about .. EJB and Hibernate….
but.. you dint give… any… Exaple… on that.. for better.. understanding….

]]> By: ara http://bill.burkecentral.com/2007/07/06/co-existence-with-hibernate-jpa-and-ejb3/#comment-3788 Thu, 28 Oct 2010 20:02:07 +0000 http://billburke.wordpress.com/2007/07/06/co-existence-with-hibernate-jpa-and-ejb3/#comment-3788 can i mix jpa and seesion calls within a single transaction?

]]> By: Carlos Rafael Ramirez http://bill.burkecentral.com/2007/07/06/co-existence-with-hibernate-jpa-and-ejb3/#comment-3771 Mon, 25 Oct 2010 21:45:52 +0000 http://billburke.wordpress.com/2007/07/06/co-existence-with-hibernate-jpa-and-ejb3/#comment-3771 Mmm good point I will read about it, but it does make sense. Thanks!

]]> By: Ondrej Medek http://bill.burkecentral.com/2007/07/06/co-existence-with-hibernate-jpa-and-ejb3/#comment-3763 Mon, 20 Sep 2010 11:29:31 +0000 http://billburke.wordpress.com/2007/07/06/co-existence-with-hibernate-jpa-and-ejb3/#comment-3763 Hi Carlos,
I am interested in the same matter. The section 13.6.5 of ejb-3_0-fr-spec-ejbcore.pdf says, that the behaviour is not specified by JEE spec and left to the the implementation. So I guess, the EntityManager is implemented to tread each call as a separate transaction. While Hibernate session may behave more “common Hibernate way”.

]]> By: Carlos Rafael Ramirez http://bill.burkecentral.com/2007/07/06/co-existence-with-hibernate-jpa-and-ejb3/#comment-3597 Mon, 03 May 2010 21:05:48 +0000 http://billburke.wordpress.com/2007/07/06/co-existence-with-hibernate-jpa-and-ejb3/#comment-3597 Bill Very good post thanks,

One question for you.

If I use a JTA transaction either Entityanager or Hibernate session behave in same way.

But if I annotate the method using:

@TransactionAttribute(TransactionAttributeType.NOT_SUPPORTED) (I don’t want to use transactions)

the entityManager.find method and session.get method with same parameters behave different due to, the object returned by find method throws Lazy exceptions in collections (in the same method in session bean) and the object obtained via get method behaves without problem.

Any explanation for this strange behaviour?

Regards,
Carlos

]]> By: Michael Chang http://bill.burkecentral.com/2007/07/06/co-existence-with-hibernate-jpa-and-ejb3/#comment-3400 Tue, 23 Mar 2010 18:19:06 +0000 http://billburke.wordpress.com/2007/07/06/co-existence-with-hibernate-jpa-and-ejb3/#comment-3400 Bill,

Nice post, thanks. It was exactly what I was looking for: a way to mix and match JPA and pure Hibernate. JPA is fine, and I’m using it exclusively in an application right now. However, I’ve recently seen the power of the Hibernate Criteria API as well as the Hibernate JPA extensions, and it’s inspired me to attempt to mix the two together, especially in my service layer where I do all of my CRUD. Hibernate is an old player in the ORM world, and it’s got tricks up its sleeves that JPA can’t match.

]]> By: Sylvie http://bill.burkecentral.com/2007/07/06/co-existence-with-hibernate-jpa-and-ejb3/#comment-2851 Mon, 13 Jul 2009 08:01:26 +0000 http://billburke.wordpress.com/2007/07/06/co-existence-with-hibernate-jpa-and-ejb3/#comment-2851 Thanks.

I try to make a basic web application based on JAVA , JSP , Servlet , EJB3.0 , hibernate … using Eclipse Ganymede AS5.0 , and so on …and I found this is quite complicated to get the information I need .

So many thanks to make thinks clearer.

]]> By: Alessandro Ilardo http://bill.burkecentral.com/2007/07/06/co-existence-with-hibernate-jpa-and-ejb3/#comment-2847 Sun, 28 Jun 2009 12:17:35 +0000 http://billburke.wordpress.com/2007/07/06/co-existence-with-hibernate-jpa-and-ejb3/#comment-2847 Someone pointed out that the following method is not portable across different application servers using Hibernate.
What’s your consideration? Which approach would you suggest if we want to obtain such object from the entity manager.
BTW, great article.

org.hibernate.Session session = (Session)manager.getDelegate();

]]> By: Jing http://bill.burkecentral.com/2007/07/06/co-existence-with-hibernate-jpa-and-ejb3/#comment-2829 Mon, 15 Jun 2009 08:03:53 +0000 http://billburke.wordpress.com/2007/07/06/co-existence-with-hibernate-jpa-and-ejb3/#comment-2829 Bill, thanks for the post, it’s quite helpful! I am wonder if Jboss has a way to support multiple persist unit WITHOUT Seam? such as has multiple data source in oracle-ds.xml, and map to persistence.xml as multiple , I guess need , and use EntityManager em = (EntityManager) context.lookup(MyEntityManger);

I tried that, but only got the first manager in the list, do I have to use Seam and component.xml?
Can you post the implementation if there is a way?

Thanks

]]> By: Ray http://bill.burkecentral.com/2007/07/06/co-existence-with-hibernate-jpa-and-ejb3/#comment-1835 Sun, 16 Mar 2008 11:28:43 +0000 http://billburke.wordpress.com/2007/07/06/co-existence-with-hibernate-jpa-and-ejb3/#comment-1835 Thanks for that info Bill, I’m liking Hibernate over JPA already :o )

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