Hi all,
I have a problem with using JPA & Google App engine
Here is my entity:
@Entity
public class UserEntity {
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public Timestamp getTimestamp() {
return timestamp;
}
public void setTimestamp(Timestamp timestamp) {
this.timestamp = timestamp;
}
private String userName;
private Timestamp timestamp;
/**
*
*/
public UserEntity() {
// TODO Auto-generated constructor stub
}
public void setID(Long iD) {
ID = iD;
}
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
public Long getID() {
return ID;
}
private Long ID;
}
I then perform inside the code:
UserEntity entity = new UserEntity();
entity.setTimestamp(new Timestamp(System.currentTimeMillis
()));
entity.setUserName(user.getNickname());
try
{
em.getTransaction().begin();
em.persist(entity);
em.getTransaction().commit();
}
catch (Exception ex)
{
String msg = "Error in persisting user";
log.severe(msg);
writer.print(msg);
ex.printStackTrace();
return;
}
finally
{
if (em.getTransaction().isActive())
{
em.getTransaction().rollback();
}
}
And in order to select the entities , I did:
StringBuilder sb = new StringBuilder();
sb.append("select u from ");
sb.append(UserEntity.class.getSimpleName());
sb.append(" u ");
Query q = em.createQuery(sb.toString());
q.setMaxResults(5);
List<UserEntity> alreadyLoggedInUsers = (List<UserEntity>)
q.getResultList();
Turns out that java.sql.Timestamp is not a supported type, in contrast
to JPA with hibernate implementation (I'm using JBoss 3.2.1 GA as J2EE
server, and I can persist entities with timestamps)
What are the supported types?
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