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faisal · Beginner Joined: 05 Dec 2002 Posts: 8 Topics: 1

Hi,
I have a rexx, running in batch Ispf. What it does is it runs forever (do forever loop). It sleeps for a few minutes, then does some processing, this goes on. Is there any simple way of sending an instruction to the rexx in the jcl, from a tso session; to change the processing.. for example make it stop, or pass some parameters to it. Currently i stop the job by cancelling it when i don't need it. I wouldn't like a very complicated solution, because i'll be probably too lazy to attempt it.

I have thought of a crude but quick way of doing it (haven't tried it yet). I keep a file where i store commands. Everytime the rexx goes to sleep, it frees the file. In that time I edit the file and code some instructions, basically set variables. When the rexx starts processing again, it reads in the file and uses "Interpret" to run the code written to the file.

Thanks

Faisal

Cogito-Ergo-Sum · Posted: Sun Dec 22, 2002 1:42 am Post subject:

Faisal,
I think we need a bit more background.

If I understand your query, you have a job that executes a REXX code. And, you want some parameters to be passed on to it via JCL. This should not be very difficult. BTW, I do not quite understand,

faisal · Beginner Joined: 05 Dec 2002 Posts: 8 Topics: 1

Okay.. I can pass paramaters via the jcl. But I want to pass parameters while the job is running. I'll give an example.. I have the time interval for the sleep function set to 180 seconds intially. Now if I want to change that, i have to stop the job, change the parameter and submit it again. I'd like to do that even as the rexx is executing.

faisal

Dibakar · Posted: Wed Jun 18, 2003 11:43 pm Post subject:

If you are still interested in a reply then you can put the sleep parameter in an input file and change it whenever and from wherever required.

dorkhead · Posted: Thu Jun 19, 2003 9:15 am Post subject:

I suspect you want to have some commands/jobs executed at
some predefined times (I do the same to submit bckp jobs after testing day)
am I right ?
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Dorkhead

dorkhead · Posted: Thu Jun 19, 2003 9:17 am Post subject:

and what I would do is have my main code read an instruction file free it
do some process go back to sleep

the instruct file would be free so u can write to it (add commands)
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Dorkhead

dorkhead · Posted: Thu Jun 19, 2003 9:18 am Post subject:

BTW do u have access to JES2 automatic commands ?

they may help here
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Dorkhead

Mike · Posted: Thu Jun 19, 2003 8:38 pm Post subject:

You could have it read a dataset which could have the parameters put in them via edit. You'd have to have it dynamically allocated and de-allocated to allow someone to edit the dataset.
Another method could be an ISPF table in which data is added in foreground but read by the batch process, again you'd have to be a little careful to circumvent in-use failures.

Another possibility could just be the creation of datasets that the Rexx could detect, this might get complicated if there's a lot of different parameters. Say, for example you wanted to change the time to 60 from 180, you could create a dataset called MY.PARMPASS.DATASET.60. The program could, via the command LISTCAT LEVEL(MY.PARMPASS.DATASET) detect that this datasets exists, extract the lowest level qualifier and adjust the time accordingly. Obviously you'd then delete the triggering dataset.
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Regards,
Mike.