how to configure the tomcat to automatically update class instances when a class file changed

hi, my class files of beans regularly changes. So,everytime i change a class file, i need to restart the tomcat server. how can i configure Tomcat to watch the changes in the class files of beans? Thanks in Advance, Sangmaeshwar.A

how to intimate the user when his session invalidation occurs in form based authentication

*Scenario :* I have developed a state full web application using form based Container managed security of Tomcat 5.5.20. In this web application state of user is maintained by container itself. My web application consists of only JSP pages grouped into folder each having index.jsp as default p