Eclipselink and Aries JPA [was: OSGi JPA Service: Spec and Implementation Mismatch]

[Harald Wellmann]

Hi Tim,

thanks for your detailed comments. They help to understand the overall 
situation and raise a couple of new questions - I need some time to 
check out the references you've given, and then I'll get back.

For now, just a quick remark on using Eclipselink with Aries JPA: I've 
tried to simply register the Eclipselink PersistenceProvider as an OSGi 
service, and this seems to do the trick both for Eclipselink 2.1.3 and 
2.2.0.

I created a bundle containing nothing but the following Activator as a 
replacement for org.eclipse.persistence.jpa.osgi.

I haven't checked out more advanced things like weaving, but the sample 
project I set up a few months ago with Aries and OpenJPA now also works 
with Eclipselink.

Regards,
Harald

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package com.googlecode.osgienterprise.jpa.eclipselink;

import java.util.Hashtable;

import org.eclipse.persistence.jpa.PersistenceProvider;
import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;

public class Activator implements BundleActivator {

    public static final String PERSISTENCE_PROVIDER = 
"javax.persistence.provider";
    public static final String ECLIPSELINK_OSGI_PROVIDER = 
"org.eclipse.persistence.jpa.PersistenceProvider";
    private static BundleContext context;


    @Override
    public void start(BundleContext context) throws Exception {
        Activator.context = context;
        registerProviderService();
    }

    public void registerProviderService() throws Exception {
        PersistenceProvider providerService = new PersistenceProvider();
        Hashtable<String, String> props = new Hashtable<String, String>();
        props.put(PERSISTENCE_PROVIDER, ECLIPSELINK_OSGI_PROVIDER);

context.registerService("javax.persistence.spi.PersistenceProvider", 
providerService, props);
    }

    @Override
    public void stop(BundleContext context) throws Exception {
    }

}