Hi Yuriy,
did you replaced the repository_internal.xml file?
OJB now does check if the autoincrement attribute of
the given object-field was set 'true'.
So class descriptor for DListImpl need this entry.
regards,
Armin
----- Original Message -----
From: "Yuriy Zubarev" <[EMAIL PROTECTED]>
To: "OJB Users List" <[EMAIL PROTECTED]>
Sent: Saturday, December 28, 2002 8:51 AM
Subject: OJB 0.9.8 and DListImpl (and PrefetchedRelationship)
> Hello everyone,
>
> I just upgraded to the latest-greatest and a simple
> piece of code that has never caused any problems
> stopped working:
>
> ...
> tx.begin();
> OQLQuery query = odmg.newOQLQuery();
> query.create("select bel from " + Course.class.getName() + " where id
= " +
> courseID);
> DList dlist = (DList) query.execute();
> ...
>
> OJB complains on the last line with the following message:
>
> [DEFAULT] WARN: Could not found autoincrement attribute for class:
> org.apache.ojb.odmg.collections.DListImpl
> [org.apache.ojb.odmg.collections.DListImpl] ERROR: Generation of new
id
> failed
> null
> java.lang.NullPointerException
> at
>
org.apache.ojb.broker.util.sequence.SequenceManagerHelper.buildSequenceN
ame(
> Unknown Source)
> at
>
org.apache.ojb.broker.util.sequence.SequenceManagerHiLoImpl.getUniqueId(
Unkn
> own Source)
> at
org.apache.ojb.broker.singlevm.PersistenceBrokerImpl.getUniqueId(Unknown
> Source)
> at
>
org.apache.ojb.broker.singlevm.DelegatingPersistenceBroker.getUniqueId(U
nkno
> wn Source)
> at org.apache.ojb.odmg.collections.DListImpl.generateNewId(Unknown
Source)
> at org.apache.ojb.odmg.collections.DListImpl.<init>(Unknown Source)
> at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
Method)
> at
>
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorA
cces
> sorImpl.java:39)
> at
>
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingCons
truc
> torAccessorImpl.java:27)
> at java.lang.reflect.Constructor.newInstance(Constructor.java:274)
> at java.lang.Class.newInstance0(Class.java:306)
> at java.lang.Class.newInstance(Class.java:259)
> at
>
org.apache.ojb.broker.singlevm.PersistenceBrokerImpl.getCollectionByQuer
y(Un
> known Source)
> at
>
org.apache.ojb.broker.singlevm.PersistenceBrokerImpl.getCollectionByQuer
y(Un
> known Source)
> at
>
org.apache.ojb.broker.singlevm.PersistenceBrokerImpl.getCollectionByQuer
y(Un
> known Source)
> at
>
org.apache.ojb.broker.singlevm.DelegatingPersistenceBroker.getCollection
ByQu
> ery(Unknown Source)
> at org.apache.ojb.odmg.oql.OQLQueryImpl.execute(Unknown Source)
>
> I have no clue why there is a need for the new id being generated...
>
> I also went to see OJB.properties and just for "fun" changed
> OqlCollectionClass to
> org.apache.ojb.broker.util.ManageableVector but OJB didn't see that
change
> (everything
> was all right with deployment), the error message I got was still
about
> DListImpl.
>
> I would appreciate any help!
>
> PS: BTW the reason I've crossed over to 0.9.8 was because
> Criteria.addPrefetchedRelationship
> worked sort of at random in version 0.9.7 - it was always correct
database
> queries-wise but in many cases I got null
> result in response. When I took addPrefetchedRelationship out, the
number of
> db queries jumped
> significantly but at least it worked all the time. I don't know if
> PrefetchedRelationship issue
> is fixed in 0.9.8, so far it seems to work fine.
>
> Thanks,
> Yuriy ZUbarev
>
>
>
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