Kevin, if you missed previous discussions on the list: I am using OpenJPA within a Java2EE 1.4 container - therefore I cannot use container injection unfortunately!
hans > -----Ursprüngliche Nachricht----- > Von: Kevin Sutter [mailto:[EMAIL PROTECTED] > Gesendet: Mittwoch, 21. Februar 2007 12:58 > An: open-jpa-dev@incubator.apache.org > Betreff: Re: Howto integrate JPA within EJB2.1 session beans? > [architecture] > > Hans, > Instead of managing the lifecycle of the EntityManagerFactory and > EntityManager yourself, why not use injection of the EM via > @PersistenceContext? There are several examples of this usage in the JPA > spec and the OpenJPA documentation. > > Kevin > > On 2/21/07, Hans Prueller <[EMAIL PROTECTED]> wrote: > > > > Hi together, > > > > I'm sorry for bothering you with numerous basic questions regarding > > OpenJPA and its usage but I have to migrate existing CMP EJBs to migrate > > within short time to OpenJPA as we're having stability issues with the > > current CMP engine. > > > > One last question I'd like to ask is regarding the recommended > > architecture of using OpenJPA within EJB2.1 Stateless sessino beans: > > > > I need to work with persistence i.e. the EntityManager throughout all > the > > session beans methods so my idea is to: > > > > - create a EntityManagerFactory in the ejbCreate() method of the SLSB > > - and also create the EntityManager itself in the ejbCreeate() method > and > > store it as a member variable of the SLSB > > - this would allow easy access within the SB's methods by just using the > > already initialized entity manager varialbe em.createNamedQuery() .. > etc. > > etc. > > - clean up should be performed in the ejbRemove() method of the SLSB > > > > I think doing so will allow migratino to openJPA with less work than > doing > > the whole lookup procedure in every method separately. > > > > what do you think? are there any pitfalls i've overlooked? > > > > thank you for your ideas! > > > > regards > > Hans > > -- > > "Feel free" - 5 GB Mailbox, 50 FreeSMS/Monat ... > > Jetzt GMX ProMail testen: www.gmx.net/de/go/mailfooter/promail-out > >
