code: protected Map<URI, AttributeValue> getEnvironment(HttpServletRequest request) {
          Map<URI, AttributeValue> envAttr = new HashMap<URI, AttributeValue>();
          String ip = request.getRemoteAddr();
  
          if (ip != null && !ip.isEmpty()) {
              envAttr.put(Constants.HTTP_REQUEST.CLIENT_IP_ADDRESS.getURI(),
                      new StringAttribute(ip));
          }
  
          return envAttr;
      }
docs: Returns a map of environment attributes.
  
  @param request
  the servlet request from which to obtain the attributes
  @return a list of environment attributes