I've tried what you are suggesting but I don't believe it is
available.
I've used the "hidden" APIs and I am only seeing the data
source set up in ColdFusion, not JRUN.
<cfscript>
factory = createObject("java",
"coldfusion.server.ServiceFactory");
</cfscript>
<cfset ds=factory.getDataSourceService()>
<cfdump var="#ds.getNames()#">