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2.5.3 Servlet filters
Servlets are preprocessed by filter objects when pre-pended at runtime or declaratively. Servlet filters are chained together to perform multiple operations on requests or responses associated with any targeted servlet. Each servlet filter normally has a specific task, such as providing security checks, auditing, or performing some kind of data validation or transformation. For details, see:
http://java.sun.com/blueprints/corej2eepatterns/Patterns/InterceptingFilter.htmlThe WebSphere Web container hooks the inbound request and outbound responses from servlets that you have selected for caching and presents them to DynaCache. The container does not use the servlet filter mechanism but rather uses an internal mechanism to do this.