How do you run RServe on AWS Lambda with NodeJS? - node.js

Question

While this question is quite open-ended, I'm generally trying to follow this excellent post here: https://aws.amazon.com/blogs/compute/analyzing-genomics-data-at-scale-using-r-aws-lambda-and-amazon-api-gateway/ which describes setting up R to run with python. I, on the other hand, am trying to get R to work with NodeJs.
I've packaged up my dependencies, deployed to Lambda, and can run simple Node scripts. However, I am having difficulty connecting to RServe from Node using the npm package Rio (https://www.npmjs.com/package/rio). RServe, on both my localhost and on Heroku, will accept the default connection of 127.0.0.1 and port 6331. No luck with AWS Lambda.
'use strict';
var rio = require('rio');
var Promise = require('bluebird');
var exec = require('child_process').exec;
var whenReady = new Promise(function(resolve){
// require libraries and bootup RServe
exec('Rscript init.R', function(error, stdout, stderr) {
(function check() {
// Attempt to connect to RServe through Rio using my 'up' test function
rio.e({
entrypoint: 'up',
callback: function (err) {
console.log(err);
if (err) return setTimeout(check, 100);
// If no connection error, rserve is running
console.log("Rserve up");
resolve();
}
});
})();
});
});
exports.handler = function(event, context, callback) {
whenReady.then(function () {
// Call hello world
rio.e({
entrypoint: 'hello',
data: {name:'Will'},
callback: function(err, result){
console.log("Error", err);
callback(null, result);
}
});
});
};
This ends with connection refused errors
2017-03-01T22:58:33.210Z 96f69baf-fed2-11e6-9164-e91b9773d645 {
[Error: connect ECONNREFUSED 127.0.0.1:6311] code: 'ECONNREFUSED',
errno: 'ECONNREFUSED', syscall: 'connect', address: '127.0.0.1',
port: 6311 }
Any ideas on how to fix this one? I'm hoping we don't need to get complicated: https://aws.amazon.com/blogs/aws/new-access-resources-in-a-vpc-from-your-lambda-functions/
Thank you in advance!
** Update **
init.R does the following
// Require some libraries
...
require('jsonlite');
up <- function () {
toJSON(TRUE)
}
run.Rserve()
** Last Update **
Gave up and went to the python example as posted in the first link.
Will