DuplicateKeyException
I use the create method of EntityBean Avion on the next way:
example:
avionLocalHome = (AvionLocalHome)ctx.lookup("ejb/aero/AvionLocal");
AvionLocal avion1 = avionLocalHome.create("Boeing", "737",189);
AvionLocal avion2 = avionLocalHome.create("McDonnell Douglas", "DC-10", 290);
It creates apropirate AvionLocal objects only when database(MySql) is empty. When it's not, it raises:
javax.ejb.DuplicateKeyException: Entity with primary key [.1.] alredy exists
exception;
primary key is generated with sequence counter:
public AvionPK ejbCreate(String proizvodjac, String model, int kapacitet) throws CreateException {
setAvionId(sequenceSession.getNextValue("Avion"));
setProizvodjac(proizvodjac);
setModel(model);
setKapacitet(kapacitet);
return null;
}
Does anybody know how can i write in the database when it's not empty(how can i generate the apropirate primary key)?
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