Accessing the Web Context
The context in which web components execute is an object that implements the ServletContext interface. You retrieve the web context by using the getServletContext method. The web context provides methods for accessing
Resources associated with the web context
The counter’s access methods are synchronized to prevent incompatible operations by servlets that are running concurrently. A filter retrieves the counter object by using the context’s getAttribute method. The incremented value of the counter is recorded in the log.