how does entirex java clients be defined to WAS ?

We are replacing NEON Shadow by EntireX. Developed java clients can be simple entirex java clients ,servlet or EJB. There are some explanations only for EJB in the doc.
The aim is to prevent recompiling when migrating from dev/test to production.WAS provides this facility if entirex can be defined as resource adapter , for instance.
So the question is how java clients performing RPC CALL to Natural servers be defined as resource adapter or any other way to achieve this facility ?
NEON was defined as JDBC adapter for instance.
EXX734,Java Clients are in Windows and Natural Servers are in z/OS
thanks in advance