Thanks for the tips! -Lon
On Thu, Jul 9, 2009 at 12:34 PM, Chuck Hill<[email protected]> wrote: > > On Jul 9, 2009, at 12:26 PM, Lon Varscsak wrote: > >> Thanks. I figured there was nothing built to do exactly what I >> needed, but I figured I would ask. >> >> Do you know if there is much overhead if I implemented this in my EO >> superclass even if there were no observers? > > EOF makes heavy use of notification. I would not expect there to be much > overhead. You will probably want to qualify the notification with the EC > (depending on what it is you are trying to do) to limit the number of > observers. And then keep the method receiving the notification fast. The > notifications are synchronous, so you don't want anything slow in this > method. > > > Chuck > > > >> >> -Lon >> >> On Thu, Jul 9, 2009 at 11:50 AM, Simon McLean<[email protected]> wrote: >>> >>> also, if you are using wonder, check out >>> hasKeyChangedFromCommittedSnapshot in ERXGenericRecord. maybe listen >>> for the notification mentioned by chuck, then use >>> hasKeyChangedFromCommittedSnapshot to check the particular key you are >>> looking at. >>> >>> simon >>> >>> 2009/7/9 Chuck Hill <[email protected]>: >>>> >>>> On Jul 9, 2009, at 10:24 AM, Lon Varscsak wrote: >>>> >>>>> Is there a way for a controller object to listen for changes to an EO >>>>> (and a specific key)? >>>>> >>>>> Thanks, >>>>> >>>>> Lon >>>> >>>> EOEditingContext has ObjectsChangedInEditingContextNotification, but it >>>> is >>>> on an object by object basis, not a key by key one. >>>> >>>> You could implement this in your EO super class. >>>> >>>> >>>> Chuck >>>> >>>> -- >>>> Chuck Hill Senior Consultant / VP Development >>>> >>>> Practical WebObjects - for developers who want to increase their overall >>>> knowledge of WebObjects or who are trying to solve specific problems. >>>> http://www.global-village.net/products/practical_webobjects >>>> >>>> >>>> >>>> >>>> >>>> >>>> _______________________________________________ >>>> Do not post admin requests to the list. They will be ignored. >>>> Webobjects-dev mailing list ([email protected]) >>>> Help/Unsubscribe/Update your Subscription: >>>> >>>> http://lists.apple.com/mailman/options/webobjects-dev/simon%40potwells.co.uk >>>> >>>> This email sent to [email protected] >>>> >>> >> > > -- > Chuck Hill Senior Consultant / VP Development > > Practical WebObjects - for developers who want to increase their overall > knowledge of WebObjects or who are trying to solve specific problems. > http://www.global-village.net/products/practical_webobjects > > > > > > > _______________________________________________ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list ([email protected]) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to [email protected]
