Problems with Hibernate/JPA in our current Netweaver project

Question

Hi together,
currently we are trying to migrate our Glassfish project to run under Netweaver. Til now, we have used Hibernate as the JPA Implementation.
If we are trying to deploy our EAR, we get the failure that the EntityManager (Persistance Unit) can not be created.
Here is our persistence-context.xml
     <persistence-unit name="soiPersistenceUnit" transaction-type="JTA">
          <provider>org.hibernate.ejb.HibernatePersistence</provider>
          <jta-data-source>SOI_DB</jta-data-source>
          <class>de.hr.ec.hai.ejb.entity.Project</class>
          <properties>
               <property name="hibernate.dialect" value="org.hibernate.dialect.SAPDBDialect" />
               <property name="hibernate.hbm2ddl.auto" value="update" />
               <property name="hibernate.show_sql" value="true" />
               <property name="hibernate.query.substitutions" value="true '1', false '0'" />
               <property name="hibernate.current_session_context_class" value="jta" />
               <property name="hibernate.transaction.manager_lookup_class" value="de.hr.ec.hai.ejb.service.SAPWebASTransactionManagerLookup" />
               <property name="hibernate.jdbc.batch.size" value="1" />
          </properties>
     </persistence-unit>
Has anyone an good hint to solve the problem?

Answer 1

Hi,
In SAP NetWeaver, you should use the persistence.xml file to configure the persistence unit.
More information: http://help.sap.com/saphelp_nwce711/helpdata/en/46/96ec3c33621e5ce10000000a1553f6/frameset.htm
Moreover, the properties you have are Hibernate-specific, which is perhaps one of the basic reasons for the problems you experience.
The SAP JPA platform supports all standard JPA properties (as per the EJB 3.0 specification) + the SAP-specific properties.
More information: http://help.sap.com/saphelp_nwce711/helpdata/en/77/fe0955fde340b3ab5220182d62b203/frameset.htm
Not least, you may need to consider the overall Java persistence infrastructure @ SAP.
More information: http://help.sap.com/saphelp_nwce711/helpdata/en/2d/23b32e8c0152469edf07909703fe03/frameset.htm
I hope that helps.
Best,
Yordan
P.S. I assume you want to migrate your application to SAP enhancement package 1 for SAP NetWeaver CE 7.1.