Thursday, September 30, 2010

Re: Minimalistic JPA in GWT 2.1.0.M3

persistence.xml has <persistence-unit name="Domain">.
I tried @PersistenceContext, @PersistenceUnit and
Persistence.createEntityManagerFactory() without any result.
The problem is it does not matter what I type in persistence.xml,
jetty does not see the file.
I'm doing something fundamentally wrong, I'll try this again tomorrow
with a fresh head.
Thanks for sticking with me!


On Sep 30, 11:33 pm, lineman78 <linema...@gmail.com> wrote:
> Does your persistence.xml have the following:
>
>  <persistence-unit name="Domain">
>
> and using the following in your session bean:
>
> @PersistenceContext(unitName="Domain")
>   EntityManager em;
>
> On Sep 30, 11:08 pm, Y2i <yur...@gmail.com> wrote:
>
>
>
> > Thanks for the reply.  I'm doing something wrong because I'm getting
> > the same error even when I place persistence.xml to /war/META-INF.
> > javax.persistence.PersistenceException: No Persistence provider for
> > EntityManager named Domain
>
> > The exception is thrown in both hosted and stand-alone mode.  I'll try
> > to configure JTA transactions first before doing anything else with
> > the JPA.
>
> > On Sep 30, 6:15 pm, lineman78 <linema...@gmail.com> wrote:
>
> > > persistence.xml should be located in /war/META-INF
>
> > > On Sep 30, 4:28 pm, Y2i <yur...@gmail.com> wrote:
>
> > > > Client's requests go the server through RequestFactoryServlet.
> > > > My service objects (those annotated with
> > > > @Service(SomeDomainClass.class) on the client side are being called
> > > > fine.
> > > > When a service method explicitly creates an entity and returns it to
> > > > the client, the request returns without problems.
>
> > > > The problem occurs as soon as I start using JPA
> > > > I use EclipseLink 2.1.0.  The transaction type is Resource Local for
> > > > now
>
> > > > When I try to eject EntityManager using @PersistenceContext, it is
> > > > always null.
> > > > When I try to get the factory using
> > > > Persistence.createEntityManagerFactory("Domain"), the call would throw
> > > > javax.persistence.PersistenceException: No Persistence provider for
> > > > EntityManager named Domain
>
> > > > It seems that nether GWT hosted server nor deployment server
> > > > (jetty-6.1.23, same as hosted server) see persistence.xml file.  It
> > > > does not matter what I type inside persistence.xml - the error is the
> > > > same, as though it is not picked up by the server at all.
>
> > > > Any help, especially where to place persistance.xml for a GWT project,
> > > > would be greatly appreciated.  Thanks in advance.
> > > > Yuri

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