If Apple is providing the XML file for third party developer use, but
they don't provide any way to monitor changes, does that mean that
their intention is for third party apps to regularly refresh from the
XML file? Isn't this an extremely expensive operation? Particularly
when moving data across a network?
How about interjecting a Core Data app, running on the machine that
maintains the XML file? That machine could monitor the XML file with
FSEvents and maintain a CD DB that mirrors the XML file, adding new
objects or fetching, updating and then saving changes, as
appropriate. On the context's WillSaveNotification, it could alert
its clients, sending just the updated information.
If this works, the question is, would it be better to maintain
mirrored CD DB's on each of the clients (clients will be a mix of Macs
and iPhones), and update those databases when changes occur? Or,
should they query the server when they need information? The client
UI's would be much more responsive if the clients each maintained
their own databases, particularly if I wanted to get cover art to the
clients, but maintenance gets more complicated.
On Jul 27, 2009, at 10:48 AM, Kyle Sluder wrote:
On Jul 27, 2009, at 10:38 AM, Brad Gibbs <bradgi...@mac.com> wrote:
Are there change notifications for the iTunes database? I'd like
to have an iTunes client on a different machine on the local
network be notified of changes, rather than having to poll and
reload the database regularly.
Nope. No public ones, anyway. You could watch the iTunes DB files
with FSEvents or kqueue and refresh over Apple events when you
detect a change.
File a Radar, too.
--Kyle Sluder
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