Re: [ANN] ChangeNotificationCenter
Re: [ANN] ChangeNotificationCenter
- Subject: Re: [ANN] ChangeNotificationCenter
- From: Pierre Bernard <email@hidden>
- Date: Fri, 4 Feb 2005 00:47:09 +0100
David,
the ERXDefaultEditingContextDelegate indeed has a few interesting
tricks up its sleeve. Guess I should look at WOnder more often.
Now I believe the flushCaches() feature does not do exactly the same
thing as my ChangeNotificationCenter. As I understand it it only clears
caches when changes from another editing context are merged in. It does
not seem to have a way of catching changes made to the EO within the
same EC. ChangeNotificationCenter saves you from having to add cache
invalidation to code to setter methods. Moreover I would have to check
the documentations, as I am not sure the delegate is called when a
snapshot is updated by a refreshing fetch.
Pierre
On Feb 3, 2005, at 10:39 PM, David Teran wrote:
Hi,
I just added another code snippet to my web page. The
ChangeNotificationCenter provides for a way to watch for changes in
EOs. The main use of this would be to be able to safely keep
cached/computed/derived values that get cleared once out of sync.
Grab it at http://homepage.mac.com/I_love_my/code.html
BTW, I have also ever so slightly updated my WebObjects page:
http://homepage.mac.com/I_love_my/webobjects.html
much easier and faster its using
public void flushCaches() {}
from ERXGenericRecord from ProjectWonder. Notifications are expensive
and EOF already sends out enough notifications.
regards, David
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