Is it a good idea to program in a non-event driven way in nodejs?
<p>In order to separate the business logic and data access layer , I have separated the files and folders in a non-event driven way. Here is an example of the User signup process I have taken , Here is my Business logic layer file.</p>

<pre><code>var userDA = require('./../DataAccess/UserDA');
module.exports = {
  signUpUser: function(userGiven)
  {
    //Some bookeeping
    userGiven.userType = "admin";

    return userDA.save(tutorGiven);
   }
}
</code></pre>

<p>and here is my data access file</p>

<pre><code>"use strict";
var mongoose = require('mongoose');
if(!mongoose.connection)
    mongoose.connect('mongodb://localhost/test');
var User = require('./../models/User');

module.exports ={

    save : function(UserGiven){
    var pass = true;

    var user = new User(UserGiven);
    user.save(function (err) {
        if(err) {
            console.log(err);
            pass = false;
        }
    });
    return pass;
},

getUser: function (email) {
    var user = null;

    user.findOne({email:email},function(err,foundUser){
        if(err)
            console.log(err);
        else
            user = foundUser;
    });
    return user;

   }
}
</code></pre>

<p>This a for a real project of medium-large size , and as a newcomer in nodejs I was wondering and in need of an expert advice if It would be any problem if I take this kind of designing approach?</p>