Keep-alived RPC in Python

[Dody Suria Wijaya]

I'm looking for a RPC library in Python that can keep its TCP connection 
alive for the duration of a user's login session. The reason is, each 
user login to the application server will impose a single dedicated 
database connection, and a TCP disconnect will indiciate application 
server to then destroy the database connection properly.

Thanks.

background:

I currently uses builtin XMLRPC library in Python, but since the 
connection is not being kept-alive, the only way application server know 
that it should destroy databaase connection is via 1) User doing logoff 
which trigger calling RPC logoff, and 2) a user activity timeout using 
monitoring thread.

Problem is, client can't guarantee that it will send logoff RPC (ie: 
killed/reboot), and timeout can not be too short or it will auto-logoff 
too early.

-- 
   dsw