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 > [email protected] > > 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 ([email protected]) > Help/Unsubscribe/Update your Subscription: > http://lists.apple.com/mailman/options/webobjects-dev/mschrag%40pobox.com > > This email sent to [email protected] _______________________________________________ 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]
