UserFacade.java

package fi.insomnia.bortal.facade;

import javax.ejb.LocalBean;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.TypedQuery;

import fi.insomnia.bortal.model.User;

@Stateless
@LocalBean
public class UserFacade extends IntegerPkGenericFacade<User> {

    public static final String DEFAULT_USER_LOGIN = "default";

    @PersistenceContext
    private EntityManager em;

    public UserFacade() {
        super(User.class);
    }

    protected EntityManager getEm() {
        return em;
    }

    public User findByLogin(String login) {
        TypedQuery<User> q = em.createNamedQuery("User.findByLogin", User.class);
        q.setParameter("login", login);
        return q.getSingleResult();
    }

    public User getOrCreateDefaultUser() {
        User defaultUser = findByLogin(DEFAULT_USER_LOGIN);

        // Create if doesn't exist yet
        if (defaultUser == null)
            defaultUser = createDefaultUser();

        return defaultUser;
    }

    private User createDefaultUser() {
        User user = new User();
        user.setLogin(DEFAULT_USER_LOGIN);
        em.persist(user);
        return user;
    }

}