SessionInvalidate for JEE Sessions

The builtin CFML function sessionInvalidate() works great for invalidating or clearing a ColdFusion session (CFID/CFTOKEN). But it doesn't invalidate the underlying J2EE / JEE session (the JSESSIONID).

You can dip down into the underlying JEE API and invoke the invalidate() function on the javax.servlet.http.HttpSession object. Here's how you can do this in CFML:

if (!isNull(getPageContext().getSession())) {
    getPageContext().getSession().invalidate();
}

We are getting the Java HttpSession object from the PageContext object (which we can obtain from the CFML builtin function getPageContext()). It is possible that getSession() could return null if there is no JEE session associated with the current request.