Unable to retrieve EntityManagerFactory
I am receiving an error
Unable to retrieve EntityManagerFactory for unitName nulljava.lang.IllegalStateException: Unable to retrieve EntityManagerFactory for unitName null
from
package session;
import javax.ejb.Remote;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.Query;
import entity.PersonObj;
import session.PersonDAO;
import javax.ejb.EJBException;
@Stateless
public class PersonDAOBean implements PersonDAO
{
@PersistenceContext
private EntityManager em;
public void addPerson(PersonObj person)
{
System.out.println("in the addperson");
try
{
em.persist(person);
System.out.println("after persist");
}catch(Throwable t)
{
System.out.println("EXCEPTION:" + t.getMessage() + t.toString());
}
}
}
this is the persistence.xml file
<?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="book" transaction-type="JTA">
<jta-data-source>jdbc/__personnel</jta-data-source>
</persistence-unit>
</persistence>
The method is being called from a backing bean
package backing;
import entity.*;
import session.PersonDAO;
import javax.ejb.*;
import javax.naming.*;
public class PersonFormImpl extends PersonObj implements PersonForm
{
private PersonObj personobj;
private PersonDAO persondao=null;
public String submit()
{
try
{
InitialContext ic = new InitialContext();
persondao = (PersonDAO) ic.lookup(PersonDAO.class.getName());
personobj=new PersonObj();
personobj.setId(this.getId());
personobj.setFname(this.getFname());
personobj.setLname(this.getLname());
persondao.addPerson(personobj);
return "success";
}catch(Exception e)
{
System.out.println(e.toString());
return "failure";
}
}
}
