How to restrict number of active logins/sessions to one per user

["Edmon Begoli" <ebegoli (at) gmail.com>]

Hi,

Can someone please suggest an effective way to restrict number of
sessions/logins allowed per user.

This is a security requirement imposed by the client I currently deal witt.

I would like for some Tomcat specialists to suggest some intelligent
solution for this.

Thanks in advance!

Thank you,
Edmon