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Date: Tue, 30 Apr 2013 20:08:28 +0530
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Subject: Re: Is it possible to override the default openjpa persistence
 provider
From: Subash Chaturanga <subashsdm@gmail.com>
To: users@openjpa.apache.org
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On Tue, Apr 30, 2013 at 6:56 PM, Rick Curtis <curtisr7@gmail.com> wrote:

> Is there a compelling reason that you're trying to extend OpenJPA? What
> container are you running in? The reason I ask is that I see that
> org.apache
> .openjpa.osgi.OSGiPersistenceProviderImpl is a valid provider. If you are
> running in an OSGI environment, that will complicate things.
>

Hi Rick
Thank you very much for the response.

The reason is I want to override the EntityManager. In fact the
EntityManager.persist() method (way I could intercept a set of JPA calls
without touching any others like Entity classes ). Thus I wanted to have my
own provider which will be like MyProvider extends
org.apache.openjpa.presist.PersistenceProviderImpl and provide my own
entity manager factory and then I can provide my EntityManager which will
again will (hoping) to extend default openjpa EntityManager classes.

Please find my persistence.xml file [1]
So I had come configuration issues and now I am getting this. Can you
please provide any solution for this.

org.apache.openjpa.persistence.ArgumentException: A JDBC Driver or
DataSource class name must be specified in the ConnectionDriverName
property. Available properties in configuration are
"org.apache.openjpa.jdbc.conf.JDBCConfigurationImpl@442ce698". at
org.apache.openjpa.jdbc.schema.DataSourceFactory.newDataSource(DataSourceFactory.java:72)
at
org.apache.openjpa.jdbc.conf.JDBCConfigurationImpl.createConnectionFactory(JDBCConfigurationImpl.java:844)
at
org.apache.openjpa.jdbc.conf.JDBCConfigurationImpl.getDBDictionaryInstance(JDBCConfigurationImpl.java:602)
at
org.apache.openjpa.jdbc.meta.MappingRepository.endConfiguration(MappingRepository.java:1510)
at
org.apache.openjpa.lib.conf.Configurations.configureInstance(Configurations.java:518)
at
org.apache.openjpa.lib.conf.Configurations.configureInstance(Configurations.java:443)
at
org.apache.openjpa.lib.conf.PluginValue.instantiate(PluginValue.java:104)
at
org.apache.openjpa.conf.MetaDataRepositoryValue.instantiate(MetaDataRepositoryValue.java:68)
at org.apache.openjpa.lib.conf.ObjectValue.instantiate(ObjectValue.java:83)
at
org.apache.openjpa.conf.OpenJPAConfigurationImpl.newMetaDataRepositoryInstance(OpenJPAConfigurationImpl.java:968)
at
org.apache.openjpa.conf.OpenJPAConfigurationImpl.getMetaDataRepositoryInstance(OpenJPAConfigurationImpl.java:959)
at
org.apache.openjpa.kernel.AbstractBrokerFactory.makeReadOnly(AbstractBrokerFactory.java:638)
at
org.apache.openjpa.kernel.AbstractBrokerFactory.newBroker(AbstractBrokerFactory.java:203)
at
org.apache.openjpa.kernel.DelegatingBrokerFactory.newBroker(DelegatingBrokerFactory.java:156)
at
org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:227)
at
org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:154)
at
org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:60)
at
org.apache.juddi.config.PersistenceManager.getEntityManager(PersistenceManager.java:45)
at
org.apache.juddi.config.AppConfig.getPersistentConfiguration(AppConfig.java:109)
at org.apache.juddi.config.AppConfig.loadConfiguration(AppConfig.java:95)
at org.apache.juddi.config.AppConfig.(AppConfig.java:62) at
org.apache.juddi.config.AppConfig.getInstance(AppConfig.java:183) at
org.apache.juddi.config.AppConfig.getConfiguration(AppConfig.java:205) at
org.apache.juddi.Registry.start(Registry.java:55)


[1] - http://pastebin.com/download.php?i=3MJtE1cZ


>
>
> On Tue, Apr 30, 2013 at 1:00 AM, Subash Chaturanga <subashsdm@gmail.com
> >wrote:
>
> > Any idea on this please ? Please find my question posted in SO [1] . This
> > is regarding openjpa 2.2.0. And I think a custom provider class
> recognizes
> > as unknown.
> >
> > Here is the code I found, this method evaluates to false for a custom
> > provider class as for example public class MyProviderImpl implements
> > PersistenceProvider, ProviderUtil
> >
> >
> >     private static boolean
> > *isOpenJPAPersistenceProvider*(PersistenceUnitInfo
> > pinfo, ClassLoader loader) {
> >         String provider = pinfo.getPersistenceProviderClassName();
> >         if (StringUtils.isEmpty(provider) ||
> > PersistenceProviderImpl.class.getName().equals(provider))
> >             return true;
> >
> >         if (loader == null)
> >             loader =
> >
> >
> AccessController.doPrivileged(J2DoPrivHelper.getContextClassLoaderAction());
> >         try {
> >             if
> > (PersistenceProviderImpl.class.isAssignableFrom(Class.forName(provider,
> > false, loader)))
> >                 return true;
> >         } catch (Throwable t) {
> >             log(_loc.get("unloadable-provider", provider,
> t).getMessage());
> >             return false;
> >         }
> >         return false;
> >     }
> >
> >
> > [1]-
> >
> >
> http://stackoverflow.com/questions/16293136/openjpa-2-2-0-cannot-add-a-custom-persistence-provider-class-openjpa-recogniz
> >
> > On Mon, Apr 29, 2013 at 11:18 PM, Subash Chaturanga <subashsdm@gmail.com
> > >wrote:
> >
> > > Hi
> > > I wrote a MyProvider
> > > extends org.apache.openjpa.persistence.PersistenceProviderImpl. And
> added
> > > MyProvider as the provider in the persistence.xml.
> > > Why I did this was to override the EntityManager.persist() method.  But
> > > seems still the default provider class get picked up. Am i missing
> > > something ?
> > >
> > > --
> > > Subash Chaturanga
> > > Sri Lanka
> > >
> > > Blog -  http://subashsdm.blogspot.com/
> > > Twitter - http://twitter.com/subash89
> > >
> > >
> >
> >
> >
> > --
> > Subash Chaturanga
> > Department of Computer Science & Engineering
> > University of Moratuwa
> > Sri Lanka
> >
> > Blog -  http://subashsdm.blogspot.com/
> > Twitter - http://twitter.com/subash89
> >
>
>
>
> --
> *Rick Curtis*
>


-- 
Subash Chaturanga
Department of Computer Science & Engineering
University of Moratuwa
Sri Lanka

Blog -  http://subashsdm.blogspot.com/
Twitter - http://twitter.com/subash89

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