Hi! Comments below marked as jph:
Cheer's <Juha> >-----Original Message----- >From: [EMAIL PROTECTED] >[mailto:[EMAIL PROTECTED] On Behalf Of ext Peter Saint-Andre >Sent: 06 March, 2008 06:36 >To: XMPP Extension Discussion List >Subject: Re: [Standards] Proposed XMPP Extension: Roster Versioning > >[EMAIL PROTECTED] wrote: >> Hi! >> >> I readed the latest version 0.0.3 and I'm little bit confused of >> statement (or I have missed something): >> >> --- clip --- >> The "roster diff" can be understood as follows: >> >> 1. Imagine that the client had an active presence session for the >> entire time between its cached roster version (in this case, >305) and >> the new roster version (317). >> 2. During that time, the client would have received roster pushes >> related to roster versions 306, 307, 308, 309, 310, 311, 312, 313, >> 314, 315, 316, and 317. >> 3. However, some of those roster pushes might have contained >> intermediate updates to the same roster item (e.g., changes in the >> subscription state for [EMAIL PROTECTED] from "none" to "to" and >> from "to" to "both"). >> 4. The roster result would not include all of the intermediate >> steps, only the final result of all changes applied while the client >> was in fact offline. >> >> --- clip --- >> >> Q: How many roster version have to server remember? In the xep 0.0.3 >> there is clear spec for client site implementation, but >server site is >> missing "server site requirements". If I keep changing the >roster add, >> remove few times ("on/off relationship") --> how many roster >versions >> have to be server must remember backwads 1...n? > >I suppose that's up to the implementation. But if the server >doesn't remember back to the version cached by the client then >we need to specify the server's behavior (probably it would >return the latest version of the entire roster, just as it does today). > jph: Yes, the "server's behavior" must be define. I agree "probably it would >return the latest version of the entire roster, just as it does today" is excellent and simplest approach and it will work. > >Peter > >-- >Peter Saint-Andre >https://stpeter.im/ > >
