websphere 7 and (application based) open-jpa 2

Question

I want to not use the built in Websphere 7 jpa plugin, instead use an application WEB-INF/lib/open-jpa 2 and a proprietary persistence provider. I cannot install the OSGI a

Answer 1

Without installing the feature pack, you're fighting a losing battle. While it is possible to plug in your own JPA implementation, it is not possible to do that with JPA API — so WAS 7 ties you to the 1.0 version of JPA (see, for example, here how this is done — no class loader policy juggling will change that, though it seems tempting at first).