Non-SAP JPA implementation

Question

Hello, experts!
  I have an WD application that uses EJB model. All works fine, but I want to change SAP JPA implementation to Hibernate JPA implementation.
  This is my persistence.xml
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="1.0" 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">
     <persistence-unit name="test" transaction-type="JTA">
     <provider>org.hibernate.ejb.HibernatePersistence</provider>
     <jta-data-source>msDS</jta-data-source>
     <properties>
          <property name="hibernate.dialect" value="org.hibernate.dialect.SQLServerDialect"/>
     </properties>
     </persistence-unit>
</persistence>
  I have got this exception after substituting JPA implementations : org.hibernate.HibernateException: The chosen transaction strategy requires access to the JTA TransactionManager
  I have read on different forums that this exception means that container cant get a transaction. But I want to use "transaction-type="JTA", not "manual" transactions.
  Thanks for any reply.

Answer 1

Are you sure that your DB (dialect) is SQL Server?
If yes, then try adding the following property to your persistence.xml
<property name="hibernate.transaction.manager_lookup_class"   
value="test.persistence.SAPCETransactionManagerLookup"/>
where SAPCETransactionManagerLookup is
package test.persistence;
import org.hibernate.transaction.JNDITransactionManagerLookup;
public class SAPCETransactionManagerLookup extends
                JNDITransactionManagerLookup {
        @Override
        protected String getName() {
                return "TransactionManager";
        public String getUserTransactionName() {
                return "UserTransaction";
You may also try adding another property along with the above one, if the aforementioned property doesn't work.
<property name="hibernate.transaction.factory_class"         
value="org.hibernate.transaction.JTATransactionFactory"/>