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XML-less JPA in JSE with EclipseLink [message #929652]

Mon, 01 October 2012 12:34

Eclipse User

I've struggled for a couple of days now trying to ascertain whether or not it's possible to create a persistence.xml 'less JPA configuration in a JSE application with EclipseLink.

I've found like solutions for Spring, Hybernate, using Tapestry, etc but not interested in any of them.

Can someone tell me whether it's possible to do so with EclipseLink?

I went so far as to create an implementation of javax.persistence.spi.PersistenceUnitInfo but when I invoke PersistenceProvider().createContainerEntityManagerFactory, I get the following:

java.lang.NullPointerException
at org.eclipse.persistence.exceptions.i18n.ExceptionMessageGenerator.buildMessage(ExceptionMessageGenerator.java:41)
at org.eclipse.persistence.exceptions.EntityManagerSetupException.createContainerEntityManagerFactoryNotSupportedInOSGi(EntityManagerSetupException.java:295)
at org.eclipse.persistence.jpa.osgi.PersistenceProvider.createContainerEntityManagerFactory(PersistenceProvider.java:62)

Thanks.

Re: XML-less JPA in JSE with EclipseLink [message #929772 is a reply to message #929652]

Mon, 01 October 2012 15:00

Eclipse User

Have you looked at the Gemini project? - the reference implementation for the OSGi specifications that provide Java EE functionality

http://www.eclipse.org/gemini/

Gemini JPA provides a standardized way to build EntityManagerFactories in OSGi and is our recommendation.

Re: XML-less JPA in JSE with EclipseLink [message #929880 is a reply to message #929772]

Mon, 01 October 2012 17:15

Eclipse User

My application is not an OSGi app, nor do I aspire to convert it to one. Wink

I'm simply trying to circumnavigate the requirement for a persistence.xml file. The results of my Google searches are indicative that others share the same requirement.

Thanks Tom.

Re: XML-less JPA in JSE with EclipseLink [message #930660 is a reply to message #929880]

Tue, 02 October 2012 10:18

Eclipse User

Try calling,

org.eclipse.persistence.jpa.PersistenceProvider.createContainerEntityManagerFactory()

It does not use a persistence.xml.

Re: XML-less JPA in JSE with EclipseLink [message #939534 is a reply to message #930660]

Wed, 10 October 2012 17:15

Eclipse User

I'm using JPA 2 so no such method. As indicated in my post, there is a createContainerEntityManagerFactory(PersistenceUnitInfo, Map) method but it's invocation resulted in the aforementioned exception.

Is there no way to do this is JSE without using OSGI? If not, moving on.

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