Re: [lemonade] About draft-gulbrandsen-imap-notify-02

[Randall Gellens <randy at qualcomm.com>]

At 10:11 AM +0800 2/10/07, Lingyan Wu wrote:

>  BTW. What I think is based upon the precondition that "while client 
> is connected only inband notifications shall take place".

This requires that the notification engine can determine if the user 
(not any particular client of the user) is logged in.  It also opens 
one timing hole during login when connected clients will get two 
notifications, one inband and the other outband.  This is probably 
not a problem, as the client should be able to handle this.  It also 
opens a second timing hole during disconnection when the client will 
not get any notifications.  It also opens the issue of client versus 
user: the server knows users, but it may be clients that care about 
specific notifications.

There was a discussion of these issues at a recent lemonade meeting 
(maybe DFW?) where there seemed to be some consensus that it is 
better for outband notifications to always be sent, regardless of 
connection state.  If the client happens to be connected, it can then 
easily resynchronize.  I think the extra cost is duplicate inband 
notifications, but only for the SELECTED mailbox.
--
Randall Gellens
Opinions are personal;    facts are suspect;    I speak for myself only
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Americans can always be counted on to do the right thing, after they
have exhausted all other possibilities. -- Winston Churchill

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