Hello,
I am running app engine plugin 2.0 RC2 and having the following problem:
The following code runs and returns null but...
PersistenceManager pm = PMF.get().getPersistenceManager();
try {
Extent<XZStore> storeExtent = pm.getExtent(XZStore.class);
if (storeExtent == null) return null; // should not be null but check
just in case
storeExtent.closeAll();
return null;
} finally {
pm.close();
}
but iterating over the extent instance throws a NullPointerException
even with an empty loop body:
PersistenceManager pm = PMF.get().getPersistenceManager();
try {
Extent<XZStore> storeExtent = pm.getExtent(XZStore.class);
if (storeExtent == null) return null; // should not be null but check
just in case
for (XZStore store : storeExtent) {
}
storeExtent.closeAll(); // line 223 where null pointer exception is
thrown
return null;
} finally {
pm.close();
}
---------------------------------------------------------------------------------
import com.google.appengine.api.datastore.Key;
@PersistenceCapable(detachable="true")
class XZStore {
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private Key key;
// ...
}
There are no instances of XZStore in the datastore so I don't know why
this is happening, I would have thought the loop would simply be skipped
without a problem.
java.lang.NullPointerException
at
com.google.appengine.datanucleus.query.StreamingQueryResult.cacheQueryResults(StreamingQueryResult.java:101)
at
com.google.appengine.datanucleus.query.StreamingQueryResult.closeResults(StreamingQueryResult.java:94)
at
org.datanucleus.store.query.AbstractQueryResult.close(AbstractQueryResult.java:137)
at org.datanucleus.store.query.Query.close(Query.java:2126)
at org.datanucleus.store.query.Query.closeAll(Query.java:2141)
at
org.datanucleus.store.DefaultCandidateExtent.closeAll(DefaultCandidateExtent.java:102)
at org.datanucleus.api.jdo.JDOExtent.closeAll(JDOExtent.java:66)
at com.foobar.foo.Data.getStoreByEmail(Data.java:223)
I was not having this problem prior to upgrading to 2.0 RC2. Any ideas of
why this behavior?
Is this a bug or am I doing something wrong?
Thanks,
JG
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