@Override
  public void setServletContext(ServletContext servletContext) {
    securityService = (SecurityService) servletContext
        .getAttribute(HttpService.SECURITY_SERVICE_SERVLET_CONTEXT_PARAM);
  }
This is used to pass attributes into the Spring/Jetty environment from the instantiating Geode
environment.
geode-web/src/main/java/org/apache/geode/management/internal/web/controllers/support/LoginHandlerInterceptor.java