On Thu, 27 Mar 2003, Balaji wrote:
> Date: Thu, 27 Mar 2003 11:07:40 +0530 > From: Balaji <[EMAIL PROTECTED]> > Reply-To: Tomcat Users List <[EMAIL PROTECTED]> > To: Tomcat Users List <[EMAIL PROTECTED]> > Subject: Architecture Details > > Hi, > Can anyone tell me where to find the overall component architecture of > Catalina ? > Note: it is considered impolite to hijack someone else's message thread to ask an unrelated question. if you want to ask a new question, you should really post a new message rather than replying to an existing one. Your best starting point is to peruse the Catalina Javadocs that are in the "tomcat-docs" webapp included with Tomcat -- also available online (although not necessarily up to date for you particular version of Tomcat): http://jakarta.apache.org/tomcat/tomcat-4.1-doc/ For the question you posted on TOMCAT-DEV about how to get the current number of active sessions (which is really more relevant here), neither interceptors (Tomcat 3.3) or valves (Tomcat 4/5) are the right way to approach to figuring that out. The reason for this is that interceptors and valves are focused on what happens to each individual request -- and sessions can be created and destroyed at times that are totally independent of when a request comes in. For any Servlet 2.3 or later container (including Tomcat 4.x or Tomcat 5.x) you should investigate using a javax.servlet.http.HttpSessionListener to detect when new sessions are created, and existing sessions are destroyed. If you store the current count in some globally accessible location, then you can use it however you like. For a Servlet 2.2 container (such as Tomcat 3.3), HttpSessionListener did not exist, so you will have to figure out how to hand-modify the container source code. And, of course, you will be tying yourself to a particular version (3.3) of a particular container (Tomcat) now and forever. You should think twice before making that sort of decision -- especially when you are looking at tying yourself to a version of Tomcat that will soon (when Tomcat 5 final is released) will be two major version numbers out of date. > TIA > Bala > Craig McClanahan --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
