active session

[jako]

Hi,
is there any way to detect if a connection from a client is still
active before to add an event in a domain?
I don't want to use timeout detection. I must to integrate a web
services method in the server side and when data arrives from it I
have to check if the connection with the client is still active, do
some operations, and so add the event to relative domain.
I saw UserActivityScheduler but it works only with timeout listener...
Thanks

Jako