public void doFilter(final ServletRequest request, final ServletResponse response, final FilterChain chain) throws IOException, ServletException {
    final HttpServletRequest httpRequest = (HttpServletRequest) request;
    HttpServletRequestWrapper wrapper = new HttpServletRequestWrapper(httpRequest) {

        @Override
        public Enumeration getHeaders(String name) {
            Enumeration headers = super.getHeaders(name);
            if( isUseFilter() && Constants.REMOTE_USER.equalsIgnoreCase(name) ){
                String user = super.getHeader(name);
                headers = enumeration(asList(isEmpty(user)? getDebuggingUserId() :user));
            }
            return headers;
        }
    };
    chain.doFilter(wrapper, response);
}