MySports Admin/src/example/mysports/admin/services/DatasourceRepository.java

package example.mysports.admin.services;

import java.util.List;

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

import example.mysports.admin.model.Datasource;

/**
 * Repository providing the admin application with read and write access for
 * data source definitions.
 * 
 * @author dclarke
 * @since EclipseLInk 2.4
 */
@Stateless
@LocalBean
public class DatasourceRepository {

    @PersistenceContext(unitName = "mysports-admin")
    private EntityManager entityManager;

    public EntityManager getEntityManager() {
        return entityManager;
    }

    public void setEntityManager(EntityManager entityManager) {
        this.entityManager = entityManager;
    }

    // TODO: maintain a list versus query every time?
    public List<Datasource> getDatasources() {
        return getEntityManager().createNamedQuery("Datasource.all", Datasource.class).getResultList();
    }

    public void create(Datasource ds) {
        getEntityManager().persist(ds);
    }

    public void delete(Datasource ds) {
        getEntityManager().remove(getEntityManager().merge(ds));
    }

    public Datasource get(String name) {
        return getEntityManager().find(Datasource.class, name);
    }

    public Datasource update(Datasource datasource) {
        return getEntityManager().merge(datasource);
    }
}