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Resolved Datawindow SaveAs locking mode

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  1. yakov werde
    yakov werde
  2. PowerBuilder
  3. Thursday, 17 May 2018 13:36 PM UTC

Hello All,

Regarding .SaveAs :: The datawindow engine handles opening, writing and closing the file.  I have yet to find any documentation about fileaccess & filemode

 

I would “guess” fileaccess is Write-only and filemode is lock-write.  But I’m not sure.

Anyone have a clear answer

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Chris Pollach @Appeon
Chris Pollach @Appeon Accepted Answer Pending Moderation
  1. Thursday, 17 May 2018 14:07 PM UTC
  2. PowerBuilder
  3. # 1

Hi Yakov;

   My guess would be file:  Write, Lock, Exclusive.

Is there an issue from your perspective for your Apps?

Regards ... Chris

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yakov werde
  1. yakov werde
  2. Thursday, 17 May 2018 14:16 PM UTC
Thanks Chris



Multi-User /Multi-Process file contention is an  issue.  That's why I'm looking for a definitive answer before conducting an experiment or implementing a unique file naming scheme.  Unlike the saying "My guess is as good as yours

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Chris Pollach @Appeon
  1. Chris Pollach @Appeon
  2. Thursday, 17 May 2018 14:49 PM UTC
Yes, when I do these type of things in my web service framework, I use the IIS session number appended to the file name to get a unique system name so that no contention issues arise.



I'll check with Engineering for you though on this aspect.

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yakov werde
  1. yakov werde
  2. Thursday, 17 May 2018 15:09 PM UTC
Thank you Sir!

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