This week's book giveaway is in the Mac OS forum. We're giving away four copies of a choice of "Take Control of Upgrading to Yosemite" or "Take Control of Automating Your Mac" and have Joe Kissell on-line! See this thread for details.
The original idea was that a HttpSessionContext would let you get at all sessions in an application. The ids would be the unique session ids. Sun decided this represented a security risk and deprecated the whole class as of servlet API 2.1 (the previous API) Bill