Alasdair wrote: 

> I just thought why don't we just increase the service ranking by
> adding 1000 to the existing one? If no ranking is set it defaults to 0
> and that means we would get the wrapped DataSource in preference.

This seems neatest - and easiest, which is a bonus. :) 

It still has the advantage that we'll obliterate short-form JNDI lookup of 
the original javax.sql.XADatasource, but long-form lookup will still be 
available. It's also hard to imagine many use cases in which users will be 
looking up the datasource using JNDI and expecting a 
javax.sql.XADatasource to come back. 

Holly






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