RE: Suggestions

rpg400-l-request@xxxxxxxxxxxx wrote:

>   6. RE: Suggestions (Bob Cozzi)
>
>A more complicated method is as follows:
>
>Create a user space that contains the next available number. You could also
>use a single-record database file, but programmers have a much easier time
>access database than a user space so the number would be a little safer in
>the user space.

An aspect of user spaces that _can_ be useful is that changes can be detected 
(practically) immediately in any other program that has an address resolved to 
the same space. If PgmA updates the field and PgmB is running in a different 
job but is referencing the same space, PgmB sees the changed value as soon as 
it happens.

Obviously, some secondary locking mechanism needs to included in order to avoid 
concurrent updates; but the result is handy in the right situations.

Tom Liotta

-- 
Tom Liotta
The PowerTech Group, Inc.
19426 68th Avenue South
Kent, WA 98032
Phone  253-872-7788 x313
Fax    253-872-7904
http://www.powertech.com


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