This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
the Filter.init(FilterConfig) is called before any request is for the filter. This does NOT mean that the init method is called at the first request it receives. But it's not developer's concern the time when the init method is invoked.