How to control logined user

Hi,

Using JAAS login model is fine for my swing app. But now there is a requirement, such that we need to create a web, by which all logined user can be monitored, and even forced to logout.

Can any one have idea, so

1. how to know who logined?

2. how to login user out?

Thanks

John

[325 byte] By [john_woo_canadaa] at [2007-11-27 11:20:07]