Session object pool

Hello!

I'm writing a server application which acts as a communicator between it's clients. Each of my sessions needs to know about other active sessions, so what I'd like to know is if there is a way to access the session object pool directly, or should I maintain my own list of running sessions?

Also, a question about "doing it the right way". I transfer data chunks (not more than several Kbytes) to/from clients using RPC calls (initiated by clients), and I use Signal_transmitter objects to notify clients about data & other stuff. Is that normal? ;)

Thanks!

A.D.