Hiya, you may want to check out my blog entry: http://codetrips.blogspot.com/2009/05/gwt-spring-and-jpa-not-really-friendly.html also remember to check out the comments there, as there are some useful pointers from Yaakov.
I will also be posting a contribution from Yaakov soon as I'm back from the US. But the short answer is, trying to make GWT and JPA play ball, it's gonna be a tough one! On Nov 8, 9:41 pm, Nik <[email protected]> wrote: > Hi, > > I have serious trouble setting up my GWT Project. > I have to use Derby and JPA. > > I installed the eclipselink plugin and tried the following: > > Set up a new GWT Project (with GWT 1.7.1). Didn't touch anything there > yet. > Then converted it into a JPA Project. (Which added persistence.xml and > some Libraries) > Created a annotated class. And changed the standard > GreetingServiceImpl.java which is installed with the new web project > wizard. In it I get a EntityManagerFactory and create a Entity out of > it. > > That's all i want to do for now. > > My persistence.xml looks like that: > > <?xml version="1.0" encoding="UTF-8"?> > <persistence version="1.0" xmlns="http://java.sun.com/xml/ns/ > persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; > xsi:schemaLocation="http://java.sun.com/xml/ns/persistencehttp://java.sun.com/xml/ns/persistence/persistence_1_0.xsd";> > <persistence-unit name="TestProject"> > > <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider> > <class>myproject.TestClass</class> > <properties> > <property name="eclipselink.jdbc.driver" > value="org.apache.derby.jdbc.ClientDriver"/> > <property name="eclipselink.jdbc.url" > value="jdbc:derby://localhost: > 1527/sample;create=true"/> > <property name="eclipselink.jdbc.user" value="app"/> > <property name="eclipselink.jdbc.password" > value="app"/> > <property name="eclipselink.ddl-generation" > value="create-tables"/> > </properties> > </persistence-unit> > </persistence> > > But when i try to run it, i get this Exception: > > Caused by: org.datanucleus.exceptions.NucleusUserException: No > available StoreManager found for the datastore URL key "". Please make > sure you have all relevant plugins in the CLASSPATH (e.g datanucleus- > rdbms?, datanucleus-db4o?), and consider setting the persistence > property "datanucleus.storeManagerType" to the type of store you are > using e.g rdbms, db4o > > I've been looking over the web for a solution the last 12 hours, but > just don't seem to find the right thing. > > Can somebody help me? > > Regards, > Nik --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
