9:31 a.m.
Hello!
I´m a newbie, but with some direction.
I´m trying to do persistence with EJB3 injected EntityManager by annotation
@PersistenceContext, but appear witch this EntityManager close the session all time that a
call is made in page, because after the first call (all good occurs), in the second call,
this appear:
"org.hibernate.PersistentObjectException: detached entity passed to persist:
br.com.bdh.view.seam.entity.FuncionarioEntity".
I put all code from the registration seam example and the code of EJB appear well simpler
then mine.
My ejb:
| import static org.jboss.seam.ScopeType.EVENT;
| import java.util.List;
|
| import javax.annotation.Resource;
| import javax.ejb.Remove;
| import javax.ejb.SessionContext;
| import javax.ejb.Stateful;
| import javax.persistence.EntityManager;
| import javax.persistence.PersistenceContext;
|
| import org.hibernate.validator.InvalidValue;
| import org.jboss.seam.annotations.Destroy;
| import org.jboss.seam.annotations.Factory;
| import org.jboss.seam.annotations.In;
| import org.jboss.seam.annotations.Logger;
| import org.jboss.seam.annotations.Name;
| import org.jboss.seam.annotations.Out;
| import org.jboss.seam.annotations.Scope;
| import org.jboss.seam.annotations.datamodel.DataModel;
| import org.jboss.seam.annotations.datamodel.DataModelSelection;
| import org.jboss.seam.core.FacesMessages;
| import org.jboss.seam.log.Log;
|
| import br.com.bdh.view.seam.ejb.Funcionario;
| import br.com.bdh.view.seam.entity.FuncionarioEntity;
|
| @Stateful
| @Scope(EVENT)
| @Name("cadastrofuncionario")
| public class FuncionarioBean
| implements Funcionario {
|
| @DataModel
| private List<FuncionarioEntity> listaFuncionarios;
|
| @In(create = true)
| private FuncionarioEntity funcionario;
|
| @Out(required = false)
| @DataModelSelection
| private FuncionarioEntity funcionarioDaLista;
|
| @PersistenceContext
| private EntityManager em;
|
| @In(create=true)
| private transient FacesMessages facesMessages;
|
| @Logger
| private Log log;
|
| private boolean isExists(FuncionarioEntity funcionario) {
| return em.createQuery("from FuncionarioEntity f where f.nome =
:nome")
| .setParameter("nome", funcionario.getNome())
| .getResultList().size() > 0;
| }
|
| public String criar() {
| log.info("Tentativa de input de funcionário.");
| if (em.contains(funcionario)) {
| facesMessages.add("O funcionário #{funcionario.nome} já está
cadastrado");
| return null;
| }
| else {
| try {
| log.info("Funcionário a persistir: " + funcionario);
| if (isExists(funcionario)) {
| facesMessages.add("Este funcionário já existe. Não pode ser
cadastrado novamente");
| }
| else {
| //funcionario = em.merge(funcionario);
| em.persist(funcionario);
| //em.flush();
| log.info("Novo funcionário #{funcionario.nome} cadastrado com
sucesso");
| facesMessages.add("O funcionário #{funcionario.nome} foi
cadastrado com sucesso");
| }
| } catch (org.hibernate.validator.InvalidStateException e) {
| InvalidValue[] vals = e.getInvalidValues();
| String message = "Estados inválidos: ";
| for (InvalidValue val: vals) {
| message += "- " + val + "\n";
| }
| facesMessages.add(message);
| return "/cadastroFuncionario.jsp";
| } catch (RuntimeException e) {
| ctx.setRollbackOnly();
| facesMessages.add("Erro: " + e.getMessage());
| }
| return "/cadastroFuncionario.jsp";
| }
| }
|
| @Factory("listaFuncionarios")
| public void findFuncionarios() {
| listaFuncionarios = em.createQuery("from FuncionarioEntity f order by
f.nome desc")
| .setMaxResults(100)
| .getResultList();
| log.debug("Lista de funcionários obtida: " +
listaFuncionarios.size());
| }
|
| @Destroy @Remove
| public void destroy() {
| listaFuncionarios = null;
| }
|
| }
|
PS.: When i remove the comment of //funcionario = em.merge(funcionario); it´s works
perfectly. But in the examples this was not necessary... I don´t know the reason!!!
PS2.: I try to do @Transient field in entity and when his trying to read field
"diasTrabalhados", the error "org.hibernate.LazyInitializationException:
failed to lazily initialize a collection of role:
br.com.bdh.view.seam.entity.FuncionarioEntity.diasTrabalhados, no session or session was
closed" appear.
The code of entity:
| import static org.jboss.seam.ScopeType.SESSION;
|
| import java.io.Serializable;
| import java.util.List;
|
| import javax.persistence.Column;
| import javax.persistence.Entity;
| import javax.persistence.GeneratedValue;
| import javax.persistence.GenerationType;
| import javax.persistence.Id;
| import javax.persistence.OneToMany;
| import javax.persistence.OrderBy;
| import javax.persistence.Table;
| import javax.persistence.Transient;
|
| import org.hibernate.validator.Length;
| import org.hibernate.validator.NotNull;
| import org.jboss.seam.annotations.Name;
| import org.jboss.seam.annotations.Scope;
|
| @Entity
| @Name("funcionario")
| @Scope(SESSION)
| @Table(name = "FUNCIONARIO")
| public class FuncionarioEntity implements Serializable {
|
| private static final long serialVersionUID = -7360165347366125305L;
|
| @Id
| @GeneratedValue(strategy = GenerationType.SEQUENCE)
| @Column(name="IDFUNCIONARIO")
| private int id;
| @NotNull @Length(min=10, max=100)
| private String nome;
| @OneToMany(mappedBy="funcionario")
| @OrderBy("data desc")
| private List<DiaUtilEntity> diasTrabalhados;
|
| @Transient
| public int getHorasTrabalhadas() {
| if (diasTrabalhados == null) {
| return 0;
| }
| else {
| return diasTrabalhados.size();
| }
| //return 0;
| }
|
| public FuncionarioEntity() {
|
| }
|
| public FuncionarioEntity(int id, String nome) {
| this.id = id;
| this.nome = nome;
| }
|
| public int getId() {
| return id;
| }
|
| public void setId(int id) {
| this.id = id;
| }
|
| public String getNome() {
| return nome;
| }
|
| public void setNome(String nome) {
| this.nome = nome;
| }
|
| public List<DiaUtilEntity> getDiasTrabalhados() {
| return diasTrabalhados;
| }
|
| public void setDiasTrabalhados(List<DiaUtilEntity> diasTrabalhados) {
| this.diasTrabalhados = diasTrabalhados;
| }
|
| public String toString() {
| int noDiasTrabalhados = 0;
| if (getDiasTrabalhados() != null) {
| noDiasTrabalhados = getDiasTrabalhados().size();
| }
| return "Id: " + id + " nome: " + nome + " dias
trabalhados: " + noDiasTrabalhados;
| }
|
| }
|
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