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I am new to the use of the Hibernate Framework and so I’m having trouble solving a question.
I’m using a relationship between objects as follows:
@Entity
@Table(name = "PEDIDO")
public class Pedido implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Integer idped;
@OneToMany(mappedBy = "pedido", targetEntity = PedidoItem.class, fetch = FetchType.EAGER)
@Cascade(org.hibernate.annotations.CascadeType.ALL)
private List<PedidoItem> listaItens;
//Getters and Setters...
}
@Entity
@Table(name = "PEDIDO_ITEM")
public class PedidoItem implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Integer idpit;
@ManyToOne
private Pedido pedido;
//Getters and Setters...
}
When I make a select or Insert using these objects, Hibernate is duplicating the data, that is, if I do an Insert, write the same request twice and the same product in the database.
Here is the method of select and Insert:
for (Pedido pedido : lista) {
List<Pedido> ped = pedDAO.verificaPedidoExistente(pedido.getCodrep(), pedido.getIdemp(), pedido.getCodeqp(), pedido.getNupdmb());
if (ped.isEmpty()) {
int idped = pedDAO.gravarPedidoMobile(pedido);
List<PedidoItem> listaItens = pedido.getListaItens();
new PedidoItemDAO().gravarItensPedidoMobile(listaItens, idped);
}
}
public List<Pedido> verificaPedidoExistente(Integer codrep, Integer idemp, String codeqp, Integer nupdmb) {
List<Pedido> pedido = new ArrayList<>();
String hql = "FROM Pedido WHERE codrep = :codrep AND idemp = :idemp AND codeqp = :codeqp AND nupdmb = :nupdmb";
Session session = HibernateUtil.getFactory().openSession();
try {
pedido = session.createQuery(hql)
.setParameter("codrep", codrep)
.setParameter("idemp", idemp)
.setParameter("codeqp", codeqp)
.setParameter("nupdmb", nupdmb)
.list();
} catch (RuntimeException erro) {
System.err.println("Erro = " + erro.getMessage());
throw erro;
} finally {
session.close();
}
return pedido;
}
public Integer novoPedido(Pedido pedido) {
int idped = 0;
Session session = HibernateUtil.getFactory().openSession();
Transaction transaction = null;
System.err.println("Grava novo pedido!");
try {
transaction = session.beginTransaction();
session.save(pedido);
idped = pedido.getIdped();
transaction.commit();
} catch (RuntimeException erro) {
if (transaction != null) {
transaction.rollback();
}
throw erro;
} finally {
session.close();
}
return idped;
}
If I debug the project in Netbeans, duplication does not happen, but in production, duplication happens.
I researched extensively, I found numerous similar situations, but it did not solve my problem.
Please, if anyone can help.
Thank you very much