This is a pure JPA thing:

public EntityManagerFactory createEMF() {

   return Persistence.createEntityManagerFactory("<PU_NAME>");

}

e.g.

* https://github.com/capedwarf/capedwarf-blue/blob/master/testsuite/src/test/java/org/jboss/test/capedwarf/testsuite/jpa/test/JPATestBase.java

Support it how?

JDO support for GAE API only comes in the form of DataNucleus.

And we do try to support DataNucleus.

As I understand it, JPA is RDBMS only and therefore not applicable to Infinispan...

 

Is this not correct?

JPA with GAE's DataNucleus plugin can work off GAE API (its DatastoreService), hence it's not just RDBMS.