Actions that want to be aware of the application Map object should implement this interface.
Actions implementing the CookiesAware interface will receive a Map of filtered cookies via the setCookiesMap method.
This interface gives actions an alternative way of receiving input parameters.
Actions that want access to the Principal information from HttpServletRequest object should implement this interface.
For components that have a dependence on the Servlet context.
All Actions that want to have access to the servlet request object must implement this interface.
All Actions that want to have access to the servlet response object must implement this interface.
Actions that want access to the user's HTTP session attributes should implement this interface.
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