[development] Google Gears

[Kieran Lal]

On 6/1/07, Scott Trudeau <strudeau at umich.edu> wrote:
>
> Right.  But what happens when a user on the live site adds a new node
> at the same time I add a new node on the local copy and the node id
> conflicts?  What happens if a user edits a node on the live site that
> I also edit on the local copy?  And that's without getting in to more
> comples site configuration syncing issues ...
>
> Not impossible, but trickier than it might seem.
>
> And on this same thread, a quick proof-of-concept by a Wordpress
> developer for syncing Wordpress content offline using Google Gears:
>
>
> http://blog.assembleron.com/2007/05/31/google-gears-caching-of-wordpress-in-php/



I attended Google Developer day and sat through most of the Google Data API,
Mash-up sessions.  They resolve conflicts using Optimistic Concurrency.
Their API is completely REST so it's something we could also implement in
Drupal.

http://code.google.com/apis/gdata/reference.html#Optimistic-concurrency

I assume that Gears makes use of this data API to resolve these issues.

Cheers,
Kieran



Scott
>
> On 6/1/07, Xavier Bestel <xavier.bestel at free.fr> wrote:
> > On Fri, 2007-06-01 at 10:37 -0400, Scott Trudeau wrote:
> > > Theoretically, a way to "sync" Drupal site instances (Google Gears
> > > aside) would be awesome.  Practically, it is a very hard problem to
> > > solve since most Drupal sites are in constant flux "in the wild" and
> > > therefor, once you "copy" a local version of the site and make
> > > changes, you have two separate branches with many potential
> > > opportunities for collision.  You can handle some sync collisions
> > > intelligently but there will always be weird cases.  Also, I can't
> > > even begin to imagine how much more effort it would take to build
> > > modules that can handle a sync framework.
> >
> > And then ? It's the same thing when you take your time to add or edit a
> > node on a busy site: you've got a "temporarily offline" reference in
> > your web browser which is "synced back" to the database when you press
> > "save".
> >
> >
> >
>



-- 
To strive, to seek, to find, and not to yield.
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