Hi Yuri, I went through similar issues trying to get GWT to work with JPA.
I would imagine that Jetty does *not* support JPA - I'm using Glassfish Enterprise Server with my GWT app for JEE / JPA support. Glassfish is open source and commercial support can be purchased if that's needed. I've been able to use injection using annotations (@PersistenceContext etc). My GWT and JEE code are in the same project - when I had them in separate projects I had problems getting them to talk. Have lots of battle scars from this one, so let me know if you have any other questions =) Cheers, Jin On Oct 4, 6:14 pm, Y2i <[email protected]> wrote: > I read through Java Persistence API spec and finally was able to make > a resource-local entity manager work. persistence.xml went to WEB-INF/ > classes/META-INF. > > I'd like to able to use a container-managed entity manager through > injection, but I'm not sure if it is possible at all using a plain web > container (Jetty). It looks as if I need to add some sort of an EE > container on top of Jetty, but I'm not sure where to start from. My > persistence unit already uses JTA-aware data source > (com.atomikos.jdbc.AtomikosDataSourceBean + > org.postgresql.xa.PGXADataSource), but when I try to use > @PersistenceContext or @PersistenceUnit, injection does not happen. I > would really appreciate it if someone could please help me understand > where I should look next. > > Thanks in advance! > Yuri > > On Sep 30, 11:52 pm, Y2i <[email protected]> wrote: > > > > > 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 <[email protected]> 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 <[email protected]> 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 <[email protected]> wrote: > > > > > > persistence.xml should be located in /war/META-INF > > > > > > On Sep 30, 4:28 pm, Y2i <[email protected]> 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 -- You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
