Re: EJB versus RPG/COBOL

In addition,
we have, for example, ONE costomized JTable that allow more an more as a SFL 
can,
and this in only in one place.

Just my cent, I have many year RPG backgound an many year of OOP,
I think generally that the development/maintenance effort is 80% reduced on OOP.

But if you want iSeries, go away with RPG and all the maintenance problems 
(like LevelCheck...). 

On Thu, 11 Mar 2004 21:28:50 +0100, Dieter Bender wrote:

>Hi Evan,

>in an object oriented language, using a good composed design, the complete 
>paging and selection logic would be one component for all the subfile stuff. 
>The whole world outside the rpg ghetto would be LOFLOL if they would read the 
>theories about application design by mixing up rpg and java and the examples 
>for great performance in the subsecond region per transaction, doing nothing.

>Dieter


>On Donnerstag, 11. März 2004 20:20, Evan Harris wrote:
>> Hi Dieter
>>
>> this is not a forum I usually speak in :) but I was motivated to respond to
>> your comment regarding "thousands of subfile programs doing all the same
>> stuff".
>>
>> I my view the subfile capability provided by the AS/400 could more fairly
>> be compared to a VB data grid or a higher level tool than a straight
>> language issue. There are thousands of subfile applications because there
>> are thousands of different business.
>>
>> The real insight into what OS/400 buys you, and by extension in this
>> discussion what RPG buys you, is that those thousands of subfile programs
>> didn't also need to have all the supporting logic surrounding paging, item
>> positioning, item selection etc etc built in each of the applications, it
>> was provided by the OS.
>>
>> There would be a ton of additional logic required to code this level of
>> presentation in any other language without the use of the components that
>> you claim provide Java's advantage so your comparison is somewhat unfair,
>> IMHO. :)
>>
>> Regards
>> Evan Harris
>>
>> >One of the points for writing java applications is the existence of quite
>> > a lot of opensource components making it easy and eficcient to write
>> > business applications in java. If I have a look to rpg applications, the
>> > wheel is reinvented over and over, thousends of subfile programms doing
>> > all the same stuff. In a well designed Java app, you have STRUTS for
>> > example, and some JSPs doing all this, you have a persistence layer done
>> > by OJB for instance, with or without Entity Beans.
>>
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>-- 
>mfG

>Dieter Bender


>DV-Beratung Dieter Bender
>Wetzlarerstr. 25
>35435 Wettenberg
>Tel. +49 641 9805855
>Fax +49 641 9805856
>www.bender-dv.de
>eMail dieter.bender@xxxxxxxxxxxx

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