I have a JPA application that works fine with Hibernate as the persistence provider. Now, I'm trying to use the gwt with eclipse to develop an AJAX client for it. I do not intend to marshal my persistent objects to the client but to simply have the client communicate with my server via XML. However, my RemoteServiceServlet runs up against Data Nucleus when I tries to use JPA. Apparently things have been already configured to use Data Nucleus as a JDO provider (and I have no knowledge or experience with either one of these).
When I started reading the Data Nucleus documentation, I was happy to discover it is a JPA provider in addition to a JDO provider. So, my first thought is it just change the configuration to use it as the JPA provider instead of Hibernate. But I'm still struggling to get things configured properly and am wondering if I can just by-pass Data Nucleus altogether and go back to using Hibernate. I have a Postgresql database with the schema already setup. My persistance.xml file is: <?xml version="1.0" encoding="UTF-8" ?> <persistence 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/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd"; version="1.0"> <persistence-unit name="huntingMap"> <provider>org.datanucleus.jpa.PersistenceProviderImpl</provider> <properties> <property name="datanucleus.ConnectionDriverName" value="org.postgresql.Driver"/> <property name="datanucleus.ConnectionURL" value="jdbc:postgresql://localhost:5432/ myapplicationdatabasename"/> <property name="datanucleus.ConnectionUserName" value="myusername"/> <property name="datanucleus.ConnectionPassword" value="myuserpassword"/> </properties> </persistence-unit> </persistence> My servlet gets the following exception: Caused by: org.datanucleus.exceptions.NucleusUserException: No available StoreManager found for the datastore URL key "jdbc". 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 at org.datanucleus.store.FederationManager.initialiseStoreManager (FederationManager.java:197) at org.datanucleus.store.FederationManager.<init> (FederationManager.java:70) at org.datanucleus.ObjectManagerFactoryImpl.initialiseStoreManager (ObjectManagerFactoryImpl.java:153) at org.datanucleus.jdo.JDOPersistenceManagerFactory.freezeConfiguration (JDOPersistenceManagerFactory.java:526) Obviously, Data Nucleus needs more or different configuration than what I have provided but I'm still reading and hacking and failing to figure this out. Any suggestions would be greatly appreciated. Jeremy --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google App Engine for Java" 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-appengine-java?hl=en -~----------~----~----~----~------~----~------~--~---
