@Singleton
@LocalBean
@Startup
public class Tester {

    @PersistenceContext
    private EntityManager em;

    @PostConstruct
    void init(){

        StoredProcedureQuery query = em.createNamedStoredProcedureQuery("FindStudentByBatch");
        query.setParameter("BATCH_NO", 2012);

        List<Student> students = query.getResultList();

        System.out.println("Executing Stored Procedure Query ................");
        for(Student student : students){
            System.out.println("Student : " + student.getFname() +" "+ student.getLname());
        }

    }
}