General information
Category:
Coding, syntax & commands
I'd use a semaphore.
something like,
when user requests datasets,
inspect the semaphore file to see what is available,
if dataset available create an audit line with UniqueID (sys(2015)),User,Batch,RecordRange,timestamp.
When user finishes, remove audit line [or move it or mark it ignore].
Then have code that looks for stale audit lines to prevent bogus lockouts.
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