Used by
ExceptionTranslationFilter to commence an authentication
scheme.
author: Ben Alex version: $Id: AuthenticationEntryPoint.java 1784 2007-02-24 21:00:24Z luke_t $
SecurityEnforcementFilter will populate the
HttpSession attribute named
AuthenticationProcessingFilter.ACEGI_SECURITY_TARGET_URL_KEY with the requested target URL before
calling this method.
Implementations should modify the headers on the ServletResponse as necessary to
commence the authentication process.
Parameters: request - that resulted in an AuthenticationException Parameters: response - so that the user agent can begin authentication Parameters: authException - that caused the invocation throws: IOException - DOCUMENT ME! throws: ServletException - DOCUMENT ME!