Re: OO benefits? (was Re: Fast400 Value to iSeries community is less than zero )

>I'm not at all convinced this is true. I add layers over and above coding
in, say, MI when I >program using OO tools, but I don't think that's
necessarily bad. If you truly thought it was >bad, I suspect you'd avoid
c++. There are tradeoffs certainly; it always comes down to >cost/benefit.
>Tom Liotta

Tom,

I did not express myself well when I was using the terms "layers" and
"complexity".

Complexity = Sum of distinct steps the pgmr needs to be knowledgeable of to
perfom a task.

So I am suspicious of client/server increasing complexity because their are
more steps the pgmr needs to know about in a cs tran than a pgm call tran.

Client Server:  1. fill the msg data structure  ( set the tran code, dcl the
data struct subflds for the specific transaction )      2. call the enqueue
function with the correct parameters.   3. call the dequeue function with
parms to wait for the response from the server.   4. code the server to call
the dequeue function to rcv the client request.   5. code the server to
parse the received msg and branch to the tran processing code.  6. execute
the server transaction business logic.   7. Code the server to enqueue the
response back to the client.

Pgm call model:     1. maybe fill a data structure with parms   2.  call the
business logic module with its specific parameters    3. in the
server/business logic pgm, code the entry parameters.   4. in the
server/blp, execute the business logic.

Client server via dtaq is more complex that the pgm call because the pgmr
must be knowledgable of 7 steps compared to 4 in the common module pgm call
approach.

Steve Richter


----- Original Message -----
From: <thomas@inorbit.com>
To: <midrange-l@midrange.com>
Sent: Monday, November 12, 2001 10:41 PM
Subject: OO benefits? (was Re: Fast400 Value to iSeries community is less
than zero )


Steve:

On Sat, 10 November 2001, "Steve Richter" wrote:

> From: <thomas@inorbit.com>
>
> >If you mean that the full 1000CPW will be required as interactive, this
is
> only true if the >application is written to do so. It's perfectly possible
> to break the interactive presentation l>ayer out and run the rest in batch
> as server functions.
>
> Tom,
>
>  When you add a layer ( in
> this case many layers ) to any software, you increase its complexity. That
> is bad.

I'm not at all convinced this is true. I add layers over and above coding
in, say, MI when I program using OO tools, but I don't think that's
necessarily bad. If you truly thought it was bad, I suspect you'd avoid c++.
There are tradeoffs certainly; it always comes down to cost/benefit.

Tom Liotta

--
Tom Liotta
The PowerTech Group, Inc.
19426 68th Avenue South
Kent, WA 98032
Phone  253-872-7788
Fax  253-872-7904
http://www.400Security.com


___________________________________________________
The ALL NEW CS2000 from CompuServe
 Better!  Faster! More Powerful!
 250 FREE hours! Sign-on Now!
 http://www.compuserve.com/trycsrv/cs2000/webmail/




_______________________________________________
This is the Midrange Systems Technical Discussion (MIDRANGE-L) mailing list
To post a message email: MIDRANGE-L@midrange.com
To subscribe, unsubscribe, or change list options,
visit: http://lists.midrange.com/cgi-bin/listinfo/midrange-l
or email: MIDRANGE-L-request@midrange.com
Before posting, please take a moment to review the archives
at http://archive.midrange.com/midrange-l.