Re: Commitment Control

[David Gibbs <david@xxxxxxxxxxxx>]

At 03:19 PM 11/1/98 , Brian Stapleton wrote:
>Greetings RPG'ers Acrross the land;

Back atcha sir!

>Can anyone give me a brief overview of commitment control?  
>Our files are already journaled, I just need to know how to code this
>in my RPG program.

Caveat: My information is meerly theoretical... I've never actually used
commitment control (although I suspect getting married is the ultimate form :).

The key opcodes in committment control are "COMIT" and "ROLLBACK"... when a
transaction is complete (transaction = update's / writes to ALL necessary
files), you execute a COMIT operation to say "These records are good...
bless them".  If, for some reason, your program decides the records are NOT
good... you execute a ROLLBACK... this causes all updates SINCE the last
COMIT to be removed as if they never were... "These records are evil,
exorsize them".

If your program abends for some reason, the system does an AUTOMATIC
rollback (I'm unsure if you need to do a "STRCMTCTL"... check out
http://publib.boulder.ibm.com/cgi-bin/bookmgr/BOOKS/QB3AUP00/3.1.1185 for
more information.

david


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