Parsing result from Node Oracledb

I have used oracledb for node as my database and I am fetching data from the dB in the following manner -

config.js

module.exports = {
  user          : "user",
  password      : "password",
  connectString : "*connstring*"  ,
  deliveredQuery: " SELECT COUNT (DISTINCT order_num) AS Cnt from orders where department = 'HR'
};

query2.js

module.exports = function(callback) {//pass callback function and return with this
  var oracledb = require('oracledb');
  var dbConfig = require('./config.js');

  this.queryDB = function(query,callback) {
    oracledb.getConnection({
      user: dbConfig.user,
      password: dbConfig.password,
      connectString: dbConfig.connectString,
      deliveredQuery: dbConfig.deliveredQuery    
    }, function(err, connection) {
      if (err) {
        console.error(err.message);
        return callback(err);
      }
      connection.execute(query, function(err, result) {
        if (err) {
          console.error(err.message);
          doRelease(connection);
          return;
        }
        //console.log(result.metaData);
        //console.log(JSON.parse(result.rows[0][0]));
        doRelease(connection);
        return callback(null, JSON.parse(result.rows[0][0]))
      });
    });

    function doRelease(connection) {
      connection.release(function(err) {
        if (err) {
          console.error(err.message);
          return callback(err);
        }
      });
    }
  };
};

serve_ontime.js

var dbConfig = require('./config.js');
var res = require('./query2.js')();
var onTime_query = dbConfig.onTime_query;

module.exports = queryDB(onTime_query, function(err, callback){  });

index.js

var res = require('./serv_ontime.js');
console.log("The result is= "+  res);

When I am doing - node index.js from my cmd then I am getting the output as undefined. I suppose it is because the call is happening asynchronously. But if you see in the file query2.js , I am returning the value after parsing(using JSON.parse) but still the value I am getting in the index.js file is not the parsed one. How can I get the value returned from the db and not as undefined??

via Dalton2