Java Tutorial/EJB3/Entity Update

Update Entity Bean

File: EmployeeBean.java

import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
@Stateless
public class EmployeeBean implements EmployeeServiceLocal, EmployeeServiceRemote {
  @PersistenceContext(unitName="EmployeeService") private EntityManager manager;
  public void doAction(){
    Customer cust = new Customer();
    cust.setFirstName("Joe");
    manager.persist(cust);
    
    System.out.println("Saved");
    
    cust = manager.find(Customer.class,cust.getId());
    
    System.out.println(cust.getFirstName());
    cust.setFirstName("new Name");
    
    manager.merge(cust);
    cust = manager.find(Customer.class,cust.getId());
    
    System.out.println(cust.getFirstName());
  }
}