Errest should be using some new method on the rest delegate probably, whose default impl is to check for that interface on the object and then fall back to something hashcodey
Sent from my iPhone On May 25, 2011, at 2:14 PM, Pascal Robert <prob...@macti.ca> wrote: > Ah, ERCStamped is fantastic for generating the Last-Modified header! Some > day, I will have two weeks off just to look at all the stuff in Wonder... > >> there's not a direct simple way to do it ... probably grab the snapshot off >> the EO and compute a hash of the values (you can ignore the keys because >> they're fixed). it might be something where you can make a new interface in >> ERX that your EO's could implement to provide a more optimal impl (like >> ERCStamped could use its lastModified as a basis). >> >> ms >> >> On May 25, 2011, at 1:55 PM, Pascal Robert wrote: >> >>> I'm trying to find a way to generate a HTTP ETag for EOs so that caching >>> can be done for REST services. What I want to do is to have the same ETag >>> value for each representation of the EO, so when one of the values change, >>> the ETag value will also change, but if the EO have the same value, it will >>> generate the same ETag as another request got. >>> >>> Problem is: I don't know what to use. I tried with myEO.hashCode() but I >>> did some tests and every time I fetch the EO, the hashcode is different >>> even if the data didn't change. I'm thinking of doing a MD5 digest of part >>> of the EO, but I was wondering if another way exist? I could use a "last >>> modified" date and generate a MD5 of that too, but that date is a better >>> option for the Last-Modified header. >>> >>> -- >>> Pascal Robert >>> prob...@macti.ca >>> >>> WOWODC 2011 : July 1-2-3, Montreal. wowodc.com >>> >>> AIM/iChat : MacTICanada >>> LinkedIn : http://www.linkedin.com/in/macti >>> Twitter : pascal_robert >>> >>> >>> >>> _______________________________________________ >>> Do not post admin requests to the list. They will be ignored. >>> Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) >>> Help/Unsubscribe/Update your Subscription: >>> http://lists.apple.com/mailman/options/webobjects-dev/mschrag%40pobox.com >>> >>> This email sent to msch...@pobox.com >> > _______________________________________________ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
