Re: Dtaq/ UsrQ Monitor

[Scott Klement <midrange-l@xxxxxxxxxxxxxxxx>]

Hi Bob,

> The problem here is that I'm not sure what I mean. I have not done anywork
> with the datq or usrq before. The program is calling another progran that is
> used to start the queue. I don't want to start the queue if it is already
> there and active. How do I know if the queue is there and active?

Do you mean you have a ("never-ending") program in a batch job that sits 
and waits for entries on the queue?  And you only want to start THAT JOB 
if it's not already running?

If so, I suggest that you use object locking.  Create a data area.  Have 
the background job do an ALCOBJ on that data area.  As long as the job 
is running, it will hold the lock.

Then the program that needs to check if it's running will first try to 
ALCOBJ on that data area with a timeout of 1 second.  If the allocation 
fails, you know the batch job is running, and you don't try to start 
another one...

Note that this question really has nothing to do with data queues or 
user queues.  It's just a basic "how to see if a background job is 
already running" type of question.