I'm using JDO now. Everythings ok On Nov 3, 2:04 pm, Patrick <[email protected]> wrote: > So I'm trying to set up a REST server and I want to use JPA for > persistence. > > But when I my app I get this error: > > javax.persistence.PersistenceException: Provider error. Provider: > org.datanucleus.store.appengine.jpa.DatastorePersistenceProvider > at javax.persistence.Persistence.createFactory(Persistence.java:176) > at > javax.persistence.Persistence.createEntityManagerFactory(Persistence.java: > 112) > at > javax.persistence.Persistence.createEntityManagerFactory(Persistence.java: > 66) > > Caused by: javax.jdo.JDOFatalUserException: 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 checked and double checked the web-inf/lib and follow everything > I saw in > :http://code.google.com/intl/fr-FR/appengine/docs/java/datastore/using... > > Anyone know what probably cause this issue?
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