[pmwiki-users] Wikifarm question

V.Krishn webmaster at insteps.net
Mon Sep 11 11:47:41 CDT 2006

On Monday 11 September 2006 18:33, Patrick R. Michaud wrote:
> On Mon, Sep 11, 2006 at 11:38:01AM +1200, John Rankin wrote:
> > On Saturday, 9 September 2006 4:49 AM, Patrick R. Michaud 
<pmichaud at pobox.com> wrote:
> > >On Fri, Sep 08, 2006 at 05:06:42PM +1200, John Rankin wrote:
> > >> We do ths by temporarily resetting $WikiDir to point to
> > >> the appropriate field's wiki.d.

Things could be simplified by not creating cache for extenal field includes. 
But I am not sure on the expense side.

> > >
> > >As a quick aside: Something about this approach is causing
> > >alarm bells to ring in my head, but I can't put my finger
> > >on exactly why.  For now let me just note that the idea of
> > >swapping $WikiDir in the middle of processing is *way* outside
> > >of my mental design spec, so I can't be certain that something
> > >won't break later on.
> >
> > I understand the alarm bells; I hear them too. The reason we
> > have ignored them for the time being is:
> > - we couldn't see another way to implement this feature and
> >   administering an entire farm from a single Site.WikiFarm
> >   page is very tidy
> How about a custom LinkFieldPage() function that works just like
> LinkPage() but checks for page existence in another field?
> Instead of using PageExists(), one can do $fielddir->exists($pagename) .
> > - we are actually more worried about having to reset $WorkDir
> >   to the selected field's wiki.d when we detect a request to
> >   browse or edit a page in a given field, as we are changing
> >   where pmwiki writes its lock file -- we are pretty sure this
> >   is OK, but could be wrong
> There's a potential conflict here if two people attempt to
> simultaneously edit the same page from different fields where
> different lockfiles are being used.

hmmm.. I don't quite understand this. If there is a link for browse or edit 
the link should take to the respective field with action=edit and not start 
edit from the calling field itself.

> One simple way to avoid this is to have PmWiki use the same
> lockfile for every field, then it doesn't matter.  Just set
>     $LockFile = '/path/to/common/.flock';
> Make sure that PmWiki has write permission to whatever directory
> contains the .flock file (/path/to/common/ above).
> Pm
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