Override the class destructor destroy() to write log messages or to release resources that have been opened in the servlet's life cycle. Resources should be appropriately closed and dereferenced so that they are recycled or garbage collected. The destroy() method runs just before the servlet itself is deallocated from memory. For more information, see the servlet API specification.
Based on the example for Overriding Initialize, the destroy() method could write a log message like the following:
out.println("myServlet was accessed " + thisMany " times.\n");