URGENT- PLEASE HELP: java.lang.threads and BC4J

Question

Hi,
according to my issue "no def found for view" in the same titled thread I'm wondering how you would implement asynchronous calls of methods that use BC4J to update a couple of data.
To be more precise:
A requirement of our software is to start an update database job, which can take a couple of minutes/hours, from the web browser. Before it will be executed the logged-in user receives a notification that this batch job has been started.
I dont't want to use JMS overhead and MD Beans for this simple requirement, therefore I implemented a class that extends java.lang.Thread and put all the update codings within the run method. After having called the start-method of the thread I get a JBO-25022(No XML file found) error when I try to set a new value for an attribute of the row. The row consists of attributes which belong to four entity objects that mus be updated.
When calling the run method directly, everything works fine.
My questions:
* do you know any workaround how to make the xml files
reachable?
* how would you implement anschronous calls of long time-
consuming jobs?
* is this a bug of BC4J?
Any help, tip, hint is really appreciated.
Stefan

Answer 1

Arno,
many thanks for your reply:
Here is an excerpt of the source code of my thread "Aenderungsdienst":
public class Aenderungsdienst extends java.lang.Thread
private SviAdministrationModuleImpl mSviModul;
// Application module that contains view object
// IKViewImpl
public Aenderungsdienst(SviAdministrationModuleImpl aSviModul)
mSviModul = aSviModul;
public void run()
ausfuehrenAenderungsdienst(mAenderungsdienstNr); <--error within this methode
private int ausfuehrenAenderungsdienst(String aAenderungsdienstNr)
int rAnzahlSaetze = 0;
try
IkViewImpl aenderungen = mSviModul.getIkView();
aenderungen.suchenAenderungssaetze(aAenderungsdienstNr); <-- method within View Object Impl that executes a query with customized where-clauses
if ((rAnzahlSaetze = aenderungen.getRowCount()) > 0)
IkViewRowImpl ik = null;
while (aenderungen.hasNext())
ik = (IkViewRowImpl) aenderungen.next();
ik.setBestandsstatus("B"); <-- error occurs here when setting the status of a current row in my rowset to "B"
mSviModul.getTransaction().postChanges();
mSviModul.getTransaction().commit();
catch (Exception e)
e.printStackTrace();
mSviModul.getTransaction().rollback();
//todo: Verarbeitungsprotokoll erstellen
return rAnzahlSaetze;
This thread will be called by the application module "sviAdministrationModuleImpl":
public void ausfuehrenAenderungsdienst(String
aAenderungsdienstNr)
Aenderungsdienst aenderungsdienst = new
Aenderungsdienst(this);
aenderungsdienst.setAenderungsdienstNr
(aAenderungsdienstNr);
aenderungsdienst.start();
Using the start() method of the thread causes this exception:
[653] No xml file: /hvbg/svi/model/businessobjects/businessobjects.xml, metaobj = hvbg.svi.model.businessobjects.businessobjects
[654] Cannot Load parent Package : hvbg.svi.model.businessobjects.businessobjects
[655] Business Object Browsing may be unavailable
[656] No xml file: /hvbg/svi/model/businessobjects/IK_Inlandsbankverb.xml, metaobj = hvbg.svi.model.businessobjects.IK_Inlandsbankverb
09.03.2004 10:27:41 hvbg.common.businessobjects.HvbgEntityImpl setAttributeInternal
SCHWERWIEGEND: Fehler beim Setzen des Attributs 1 im Entity Objekt: JBO-25002: Definition hvbg.svi.model.businessobjects.IK_Inlandsbankverb vom Typ Entitätszuordnung nicht gefunden.
09.03.2004 10:27:42 hvbg.svi.model.dienste.Aenderungsdienst ausfuehrenAenderungsdienst
SCHWERWIEGEND: Beim Ausführen des Aenderungsdienstes 618 trat während der DB-Aktualisierung ein schwerer Fehler auf:
JBO-25002: Definition hvbg.svi.model.businessobjects.IK_Inlandsbankverb vom Typ Entitätszuordnung nicht gefunden.
oracle.jbo.NoDefException: JBO-25002: Definition hvbg.svi.model.businessobjects.IK_Inlandsbankverb vom Typ Entitätszuordnung nicht gefunden.
     at oracle.jbo.mom.DefinitionManager.findDefinitionObject(DefinitionManager.java:328)
     at oracle.jbo.mom.DefinitionManager.findDefinitionObject(DefinitionManager.java:268)
     at oracle.jbo.server.MetaObjectManager.findMetaObject(MetaObjectManager.java:649)
     at oracle.jbo.server.EntityAssociation.findEntityAssociation(EntityAssociation.java:98)
     at oracle.jbo.server.AssociationDefImpl.resolveEntityAssociation(AssociationDefImpl.java:725)
     at oracle.jbo.server.AssociationDefImpl.getEntityAssociation(AssociationDefImpl.java:135)
     at oracle.jbo.server.AssociationDefImpl.hasContainer(AssociationDefImpl.java:546)
     at oracle.jbo.server.AssociationDefImpl.getContainer(AssociationDefImpl.java:468)
     at oracle.jbo.server.EntityImpl.getContainer(EntityImpl.java:1573)
     at oracle.jbo.server.EntityImpl.setValidated(EntityImpl.java:1649)
     at oracle.jbo.server.EntityImpl.setAttributeValueInternal(EntityImpl.java:2081)
     at oracle.jbo.server.EntityImpl.setAttributeValue(EntityImpl.java:1985)
     at oracle.jbo.server.AttributeDefImpl.set(AttributeDefImpl.java:1700)
     at oracle.jbo.server.EntityImpl.setAttributeInternal(EntityImpl.java:946)
     at hvbg.common.businessobjects.HvbgEntityImpl.setAttributeInternal(HvbgEntityImpl.java:56)
     at hvbg.svi.model.businessobjects.IKImpl.setBestandsstatus(IKImpl.java:174)
     at hvbg.svi.model.businessobjects.IKImpl.setAttrInvokeAccessor(IKImpl.java:770)
     at oracle.jbo.server.EntityImpl.setAttribute(EntityImpl.java:859)
     at oracle.jbo.server.ViewRowStorage.setAttributeValue(ViewRowStorage.java:1108)
     at oracle.jbo.server.ViewRowStorage.setAttributeInternal(ViewRowStorage.java:1019)
     at oracle.jbo.server.ViewRowImpl.setAttributeInternal(ViewRowImpl.java:1047)
     at hvbg.svi.model.dataviews.IkViewRowImpl.setBestandsstatus(IkViewRowImpl.java:264)
     at hvbg.svi.model.dienste.Aenderungsdienst.ausfuehrenAenderungsdienst(Aenderungsdienst.java:337)
     at hvbg.svi.model.dienste.Aenderungsdienst.run(Aenderungsdienst.java:290)
Using run(), everything works perfectly.
The view object IKView consists of four entity objects which are linked by associations. There exists an association between the entity objects ik and inlandbankverb. The xml-file for the association object is named "ik_inlandsbankverb.xml". It seems so that this definition could not be found when calling my thread in asynchronous (via start()-method call) mode.
Is this a bug of JDeveloper?
Thanks in advance,
Stefan