Hi Charles, I'm afraid that I had to return to the UK on Tuesday after doing my lab on Monday due to scheduling conflicts, so I'm no longer at Devoxx, but hopefully I can answer all your questions via the email lists.
The main changes you need to make to use container managed JPA are as follows: 1. Change the <jpa:unit unitname="camel" ... tag to be a <jpa:context ... tag. 2. Change the type of your setter to be an EntityManager, and remove any lifecycle management code (e.g. emf.createEntityManager(), em.joinTransaction(), em.close() etc) 3. If you were previously passing your EntityManager between objects then consider injecting them with a managed persistence context instead. There is no need to pass around the "current" EntityManager, as the container will ensure the correct one is used. The changes shouldn't be too complicated to make, and should make your application code a bit shorter and more business focussed. Regards, Tim ---------------------------------------- > Date: Thu, 18 Nov 2010 17:37:40 +0100 > From: [email protected] > To: [email protected] > Subject: Re: How to translate Spring JPA into Aries JPA > > Hi Timothy, > > I'm at the DevoXX. So maybe we can discuss a little bit tomorrow. We > have a stand (FuseSource). > > How can I configure the container-manager JPA as you tell me that I > configure it like Application-Manager JPA ? > > Regards, > > Charles > > On 08/11/10 15:17, Timothy Ward wrote: >> Hi, >> >> It looks like you're trying to do Application-Managed JPA rather than >> container-managed JPA with this example (i.e. you want to have an >> EntityManagerFactory and manage the EntityManager lifecycle yourself). >> >> In this case you can just inject the persistence unit directly into the bean >> that wants it with e.g. >> >> >> >> >> >> This encompasses all of the integration with global transactions as well as >> the JPA injection via the setEntityManagerFactory method. >> >> >> >> Managed transactions can be configured using the transactions namespace e.g. >> >> >> >> >> >> This bean will have a "Required" transaction attribute for all public >> methods invoked from outside the bean. >> >> >> >> These two concepts are often used together with container-managed >> persistence contexts (i.e you let the container manage the EntityManager >> lifecycle). There are examples of this in the Blog sample. >> >> >> >> >> >> >> >> >> I hope this helps. If you'd like to put any of your experiences together it >> would be great to start building some better documentation for the Aries JPA >> component. >> >> Regards, >> >> Tim >> >> ---------------------------------------- >>> Hi, >>> >>> Do we have an example showing what we define like this in spring >>> >>> >>> class="org.springframework.transaction.support.TransactionTemplate"> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> class="org.springframework.orm.jpa.LocalEntityManagerFactoryBean"> >>> >>> >>> >>> but using Aries JPA and Aries Transaction now ? >>> >>> Regards, >>> >>> Charles M. >>> Apache ServiceMix, Camel and Karaf committer
