RE: Business Logic Servers ( was: MVC in RPG?)

<snip>
The design of the business logic depends somewhat on your preference for
communcations...
</snip>

It shouldn't. The whole idea behind the business layer is that it is use
agnostic (i.e. same logic can be used from another native program call
for a screen, as a stored procedure, called by a web app, or a web
service). Communications should be handled at a layer above the business
object and this is where you will get into separate programs (perhaps in
several different languages) for each way the server programs are used.

I do agree that error handling is very important and ideally, all of the
individual servers would report errors in the same way.

Matt