Yes. If you use the SQLite store, it automatically uses filesystem locking. 
Indeed, that is how CalendarStore and AddressBook operate under the hood these 
days I believe.

The major caveat is that the locking doesn't work if the file is accessed from 
two different filesystems. i.e. a local file which another machine is also 
trying to access over the network at the same time.

Mike.

On 28 Dec 2009, at 17:50, Robert Monaghan wrote:

> Is it possible to share a DataModel and resulting db file between 2 apps?
> If so, what sort of pitfalls are present?
> 
> I want to create an App that creates the DB file, and a plugin for another 
> App, that reads the database file.
> 
> Thanks!
> 
> bob..
> 
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