Re: run a program when a file changes

[Booth Martin <booth@xxxxxxxxxxxx>]

Yes.   This just might work out after all.  Thank you Dennis & John.


On 9/12/2018 8:00 AM, Denis Robitaille wrote:
> Hello,
>
> Here is how I understand your situation.
>
> -At random time during the day, the file is cleared and is repopulated
> -After the files gets repopulated, you want to call another program that will process the content of the file
> -You need a way to know that the file repopulation has taken place and is finished so you can start to process it.
> -You would prefer to avoid a trigger on the file since you are only interested in knowing when the repopulation process is finished.
>
> If I understood right, the solution is to add a step in the program that uses DDM to populate the file. That step is to "signal" to the system that the file is ready for processing.
> That "signal" can take several form:
> - Create a "flag" file or flag data area
> - Change the content of a data area
> - Put an entry on a data queue
> - ...
> Your program would need to monitor for this flag and start processing when it is received. Personally, I would choose the data queue route.
>
> Hope this help
>
>
> Denis Robitaille
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> -----Message d'origine-----
> De : RPG400-L <rpg400-l-bounces@xxxxxxxxxxxx> De la part de Booth Martin
> Envoyé : 11 septembre 2018 21:44
> À : RPG programming on the IBM i / System i <rpg400-l@xxxxxxxxxxxx>
> Objet : run a program when a file changes
>
> This has to be simpler than I am making it.
>
> Several random times a day a file is cleared and then populated again through DDM .  When that happens I want to automatically run a program that updates another file.
>
> A trigger is on rows, so using a trigger would run the program for every row  -  not a good solution.
>
> I cannot access the original file nor the machine that it is on.
>
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