Question

I am trying to create a web app using JSF and EJB 3.0.

I am using plain JSF, Glassfish Server, Hibernate as my persistance provider. My database is apache derby.

Here my Stateless Session bean as follows:

  @Stateless
  @TransactionManagement(TransactionManagementType.CONTAINER)
  public class StudentServiceBean implements StudentService{


    @PersistenceContext(unitName="forPractise")
    private EntityManager entityMgr;

    @Resource
    private SessionContext sessionContext;

    @Override
    public List<StudentVO> fetchStudentListOrderByStudentId(boolean flag){
        List<StudentEntity> studentList = null;
        TypedQuery<StudentEntity> studentQuery = null; 
        List<StudentVO> studentVOList = null;
        String queryDesc = "select s from StudentEntity s order by s.studentId desc";
        String query = "select s from StudentEntity s order by s.studentId";
        try{

            if(!flag){
                studentQuery = entityMgr.createQuery(query,StudentEntity.class);
            }else{
                studentQuery = entityMgr.createQuery(queryDesc,StudentEntity.class);
            }           

            studentList = studentQuery.getResultList();
            studentVOList = new ArrayList<StudentVO>();
            for(StudentEntity studentE : studentList){              
                studentVOList.add(new StudentVO(String.valueOf(studentE.getStudentId()),studentE.getStudentName(),studentE.getContactNumber()));
            }

        }catch(Exception e){
            System.out.println(" EXCEPTION IN "+this.getClass().getName()+" in method fetchStudentListOrderByStudentId "+e);
        }
        return studentVOList;
    }

And this is my persistence.xml:

 <?xml version="1.0" encoding="UTF-8"?>
 <persistence 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_2_0.xsd"
              version="2.0">
    <persistence-unit name="forPractise" transaction-type="JTA">
        <provider>org.hibernate.ejb.HibernatePersistence</provider>
        <jta-data-source>jdbc/app</jta-data-source>
        <class>com.entity.StudentEntity</class>
        <properties>
                <property name="hibernate.dialect"  value="org.hibernate.dialect.DerbyDialect"  />
                <property name="hibernate.show_sql" value="true" />
                <property name="hibernate.format_sql" value="true" />               
                <property name="hibernate.transaction.manager_lookup_class" value="org.hibernate.transaction.SunONETransactionManagerLookup" />             
        </properties>
    </persistence-unit>
 </persistence>

What happens is on load of the JSP page, the getter method of StudentList is called –
inside the getter method I have written logic that if studentList is empty then call the studentService.fetchStudentListOrderByStudentId(true);.

But when I do this I get an exception:

EXCEPTION IN com.bb.StudentServiceBean in method
fetchStudentListOrderByStudentId
org.hibernate.service.UnknownServiceException: Unknown service
requested
[org.hibernate.service.jdbc.connections.spi.ConnectionProvider]

Can you please tell me what I am missing, or where I am going wrong?

Thanks.

Answer 1

You indicate that you are using Hibernate 4.x, but the class you mentioned afaik is only valid for JPA 1.0 and Hibernate 3.x. Try removing the following line from your configuration:

<property name="hibernate.transaction.manager_lookup_class" value="org.hibernate.transaction.SunONETransactionManagerLookup" />