howto implement global applications?

[mall]

Hi, I've just recently read the JSP and Servlet specifications and I was wondering if there was a way to implement a global application in tomcat. I want some of my JSP pages to be able to access an object that manages a pool of database-connected-threads. I tried declaring such an object as static but it reloads the object whenever the JSP page gets modified. I've also looked at tomcat's explaination of some of the elements in server.xml file and it mentioned something about using Requestinterceptors to implement global applications but it doesn't say too much after that.