I was probably injecting the EM at that point, but I've since switch to
inject an EMF due to threading issues.
--
Jason Lee
Programmer/Analyst
-----Original Message-----
From: Marina.Vatkina_at_Sun.COM [mailto:Marina.Vatkina_at_Sun.COM]
Sent: Tuesday, June 06, 2006 6:49 PM
To: users_at_glassfish.dev.java.net
Subject: Re: createQuery() NPE
Jason,
EntityManagerWrapper means that you either injecting or looking up an
EM, not creating it from EMF. Is this the case?
thanks,
-marina
Jason Lee wrote:
> By "package" I meant archive. It's in the META-INF/ directory of the
> same archive (.war) that holds the classes in question.
>
> Unfortunately, as far as the NPE goes, I don't have much to go on.
> Here's all I have from the server logs :
>
> [#|2006-06-06T15:14:33.110-0500|INFO|sun-appserver-pe9.0|javax.enterpr
> is
> e.system.stream.out|_ThreadID=14;_ThreadName=httpWorkerThread-8080-0;|
> java.lang.NullPointerException
> at
> com.sun.enterprise.util.EntityManagerWrapper.createQuery(EntityManager
> Wr
> apper.java:525)
> at
> com.iecokc.chronos.model.dao.impl.ChronosDaoJpaImpl.getJobs(ChronosDao
> Jp
> aImpl.java:28)
> at com.iecokc.chronos.test.TestBean.getJobs(TestBean.java:26)
>
> I can't use NetBeans, as Eclipse is the corporate standard.
>
> I have Googled, but not found anything of value. Of course, it's
> likely that my choice of keywords isn't correct, so I continue to try
> slightly different searches, but I'm not having any success thus far.
>
> I had forgotten about the verifier, which pointed out some issues it
> had with my persistence.xml, which I though was spec compliant, but I
> made the changes anyway, just to be sure. The errors still persisted
> until I moved the entity beans, the DAO, and META-INF/persistence.xml
> to a separate jar file in the root of the ear, at which point things
> started working. I'm confused as to why that would have made a
> difference. It is my understanding that it ought to work, but either
> my understanding is flawed, or I was missing something fundamental. :|
>
> At any rate, I got it working. Why it works I'll leave to another
day.
> ;)
>
> Thanks for your help.
>
> --
> Jason Lee
> Programmer/Analyst
>
>
> ________________________________
>
> From: Ludovic.Champenois_at_Sun.COM [mailto:Ludovic.Champenois_at_Sun.COM]
> Sent: Tuesday, June 06, 2006 3:16 PM
> To: users_at_glassfish.dev.java.net
> Subject: Re: createQuery() NPE
>
>
> Jason Lee wrote:
>
> Well, I thought I could whip this one on my own, but I'm just
not
> having a very good day so far. :P I have the EM now injected
> correctly, but when I call em.createQuery("select j from Job j"); i
> get a NPE. Job is an annotated class (@Entity, @Table, @Id and
> Serializable, fwiw) in the same package as the PU file, which also
> references the class explicitly. em.isOpen() returns true, but any
> other call on the object results in an NPE. It has to be something
> subtle I'm missing, as some working code we have looks extremely
> similar.
>
>
> Obviously, for such 'subtil' issues, we need much more than 'I get a
> NPE' description...
> Maybe you could 'google' this exception to see if it is mentioned
> somewhere.
> Using tools like NetBeans 5.5 can also avoid many common mistakes.
> You can also run the verifier tool to track advanced errors
> (.../bin/verifier(.bat/.sh) archivename). The verifier tool is also
> in NetBeans 5.5.
>
> I am not sure why you say 'same package as the PU file...' The PU file
> should not be in a package, but in in a META-INF dir.
>
> Ludo
>
>
>
> I'm just having trouble tracking it down. Anyone have any
quick
> hints off the top of their head? Thanks!
>
> --
> Jason Lee
> Programmer/Analyst
>
>
>
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