Also available:
pgm-W copies/creates-fills whatever B/dummy
when done, pgm-W renames B/dummy to B/F
pgm-D only scouts for B/F and does it thing when found
Steve
[EMAIL PROTECTED]
Manuel Vazquez Acosta wrote:
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This seems a synchronization problem. A scenario description could clear
things up so we can help:
Program W (The workflow) copies file F to directory B
Program D (the dog) polls directory B to find is there's any new file F
In this scenario, program D does not know whether F has been fully
copied, but W does.
Solution:
Create a custom lock mechanism. Program W writes a file D/F.lock to
indicate file F is not complete, it's removed when F is fully copied.
I program W crashes in mid-copy both F and F.lock are kept so program D
does not bother to process F. Recovery from the crash in W would another
issue to tackle down.
Best regards,
Manuel.
writeson wrote:
Hi all,
I'm writing some code that monitors a directory for the appearance of
files from a workflow. When those files appear I write a command file
to a device that tells the device how to process the file. The
appearance of the command file triggers the device to grab the
original file. My problem is I don't want to write the command file to
the device until the original file from the workflow has been copied
completely. Since these files are large, my program has a good chance
of scanning the directory while they are mid-copy, so I need to
determine which files are finished being copied and which are still
mid-copy.
I haven't seen anything on Google talking about this, and I don't see
an obvious way of doing this using the os.stat() method on the
filepath. Anyone have any ideas about how I might accomplish this?
Thanks in advance!
Doug
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