V4MD: Multiple opened Projector edit the same local db -> is that safe?

[Marc Schmitt]

Hi Ruslan,

hopefully ;) one very last question:
Let's say a projector opens a db and the projector dies (maybe a crash or something) 
before the projector closes the db via db.close() explicitly. 
What happens to 'db.isopen' property? Will it remain 1 or will it be automatically reset to 0?

Thanks in advance and best regards
Marc
-------- Original-Nachricht --------
> Datum: Tue, 10 Jun 2008 17:09:29 +0300
> Von: Ruslan Zasukhin <sunshine at public.kherson.ua>
> An: "valentina at lists.macserve.net" <valentina at lists.macserve.net>
> Betreff: Re: V4MD: Multiple opened Projector edit the same local db -> is that safe?

> On 6/10/08 4:52 PM, "Marc Schmitt" <Marc_Schmitt at gmx.de> wrote:
> 
> Hi Marc,
> 
> > Are you inferring that:
> > - each Projector has to re-open the db, do its query and then close the
> db on
> > every occasion?
> 
> Yes, this is open/close trick.
> 
> You can find a lots of info about it on this list archive about 2000 -
> 2006
> years
> 
> > - the projector opens the db only if 'db.isOpen' is 0 ?
> 
> Yes.
> 
> Although on MAC OS X you need yet own  .lock file
> Also see lists archives.
> 
> > - and when 'db.isOpen' = 1 then the projector has to wait until
> 'db.isOpen' =
> > 0 again ?
> 
> Yes - 
>  
> > is that alltogether the open/close trick?
> > If not, could you please provide more info on that?
> 
> 
> 
> -- 
> Best regards,
> 
> Ruslan Zasukhin
> VP Engineering and New Technology
> Paradigma Software, Inc
> 
> Valentina - Joining Worlds of Information
> http://www.paradigmasoft.com
> 
> [I feel the need: the need for speed]
> 
> 
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