A Servlet Filter can be implemented by creating a Class that implements javax.servlet.Filter In this spike the logic that was on the WebContextServlet.java, has been moved to a WebContextFilter.java.

This way we were able to rely on the urlPatterns of the Filter, that are more flexible than the Servlet allows. And other positive outcome was the fact that this Filter implementation is very similar to Pentaho Server PentahoWebContextFilter.java, enabling a future story to unify this two separate implementations into one