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/usingjpa.html
Anyone know what probably cause this issue?
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