[thelist] Querying a legacy app
Hassan Schroeder
hassan at webtuitive.com
Thu Aug 28 15:52:40 CDT 2003
Les Lytollis wrote:
> I am implementing a .NET B2B web-based ordering system which will get
> its data from a Progress DB on AIX fronted by a bespoke SOP system. For
> a number of reasons, we want to let the SOP system query the Progress DB
> rather than let the web app query it directly, so the web app will make
> a request to the SOP system.
>
> The suppliers of the SOP system are prepared to make some sort of
> listener to accept message requests, but what I can't get my head around
> is how I get the message to and from the SOP system. Do I need to create
> some sort of server or listener on the web app that can accept
> responses? Is this a Web Service? A message queue? SOAP?
Uhhhhh -- depends. :-)
Your web app is the requester, the SOP system is the responder.
Will there always be *one* requester and *one* responder? Or maybe
one-to-many, many-to-one, or many-to-many?
And what is the time requirement on the response? An "immediate"
response like a Web server or "sometime later", batch system style?
The answers to those will influence whether you use a direct SOAP
over HTTP request or an asynchronous message queue.
FWIW!
--
Hassan Schroeder ----------------------------- hassan at webtuitive.com
Webtuitive Design === (+1) 408-938-0567 === http://webtuitive.com
dream. code.
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