More Servlets and JavaServer Pages™

10.10. Example: Monitoring Yacht Orders

You’re “promoted” to sales manager. (OK, ok, so that is too horrible a fate to contemplate. All right then, you are asked to help the sales manager.) You want to track buying patterns for a specific item (a yacht, in this case). Of course, you could try to find all servlets and JSP pages that process orders and change each one to record yacht purchases. That’s an awful lot of work for what sounds like a simple request, though. Pretty hard to maintain, anyhow.

A much better option is to create a session attribute listener that monitors the attributes corresponding to order reservations or purchases and that records the information in the log file for later perusal by the sales manager.

The following steps ...