Do we have any control on Tomcat threads?

[Agarwal, Naresh]

Hi
 
Web apps in tomcat run in threads spawned by Tomcat. Do we have any control on these 
threads?
 
I want to perform some Init and UnInit operations at the time creation and destruction 
of these threads. Is it possible to do with Tomcat threads?
 
thanks & regards,
Naresh Agarwal