@Override
    protected void service(HttpServletRequest req, HttpServletResponse resp)
            throws ServletException, IOException {
        String method = req.getMethod();
        doAction(req, resp, method);
    }
@see javax.servlet.http.HttpServlet#service(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
gateway/platforms/servlet/src/main/java/io/apiman/gateway/platforms/servlet/GatewayServlet.java