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From Marina Vatkina <Marina.Vatk...@Sun.COM>
Subject Re: Testing an OpenJPA module
Date Wed, 11 Apr 2007 00:09:48 GMT
It's pretty much defined by the spec that Persistence class just delegates to 
the providers to do the work and has no way to report the errors:

7.2 Bootstrapping in Java SE Environments

The Persistence bootstrap class will locate all of the persistence providers 
<...> and call createEntityManagerFactory() on them in turn until an appropriate
backing provider returns an EntityManagerFactory.
If a provider does not qualify as the provider for the named persistence unit, 
it must return null when createEntityManagerFactory is invoked on it.


Craig L Russell wrote:
> FYI, Persistence is an open source project at Glassfish.
> Anyone, even an OpenJPA contributor, who wants to contribute to the  
> project for example to improve the error messages, is welcome to look  
> at the sources and provide a patch. I know people who will be happy  to 
> commit usability patches. ;-)
> Craig
> On Apr 10, 2007, at 1:54 PM, Pinaki Poddar wrote:
>> The error message could have been more specific in the following way:
>> a) no META-INF/persistence.xml has not been found in classpath
>> b) META-INF/persistence.xml has been found but there is no 'ode-store'
>> unit defined in it.
>> c)  META-INF/persistence.xml has been found but provider can not be
>> loaded/invoked
>> When I first encountered this error, my interpreation was (b) from the
>> way the message was worded.
>> Pinaki Poddar
>> BEA Systems
>> 415.402.7317
>> -----Original Message-----
>> From: [] On Behalf Of Jacek
>> Laskowski
>> Sent: Tuesday, April 10, 2007 2:52 PM
>> To:
>> Subject: Re: Testing an OpenJPA module
>> On 4/10/07, Marc Prud'hommeaux <> wrote:
>>> Glad you got it fixed. It's annoying that
>>> javax.persistence.Persistence doesn't provide more of a clue as to  why
>>> it failed.
>> I wonder what else you'd like to see other than what's already printed
>> out? It tells exactly why it's failed - "No Persistence provider for
>> EntityManager named ode-store" is just a JPA version of
>> "NoClassDefFoundError" in "pure" Java.
>> Jacek
>> -- 
>> Jacek Laskowski
>> Notice:  This email message, together with any attachments, may  
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> Craig Russell
> Architect, Sun Java Enterprise System
> 408 276-5638
> P.S. A good JDO? O, Gasp!

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