[jdev] s2s implementation

[pablo platt]

server1 has 100 online users
server2 has 100 online users
the servers are disconnected.

Now the servers connect.
The online users won't send probes so they won't know about users on the
other server
until they sign out and login again.

It might be acceptable but it's not completely in sync unless the server
send probe on behalf of already online users.

On Sun, Oct 31, 2010 at 3:00 AM, Matthew Wild <mwild1 at gmail.com> wrote:

> On 30 October 2010 19:23, pablo platt <pablo.platt at gmail.com> wrote:
> > There is still an uncovered point
> > where both servers have online users and they connect.
> >
>
> XMPP isn't IRC :)
>
> Don't think in terms of servers, think it terms of users and
> subscriptions. If there is a subscription then the user's server will
> do everything necessary to notify the contacts' servers of their
> presence, and vice versa. If the contact's server is offline, that
> presence isn't of any use anyway - the contact is offline. When the
> server is online again, and the contact signs in, the contact's server
> sends probes out to discover the status of our user. This way
> everything stays in sync.
>
> Regards,
> Matthew
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