In node.js how to get the result of the other module function in current module?

I need the result of other module function in my current module.How can i do this.

module1.js 

         var module2=require('./lib/module2');
         module2.getValue();

Now i want that 'true' returned in the getValue method.How can i get here.

In other languages below code will work

var result=module2.getValue();

But in node.js we have to use callback method to get that value.How can i do that.

module2.js

exports.getValue=function(){

   console.log('getValue method called.');
   return true;

};

Finally i changed my module1 code also but i'm not getting that result as true.Below is my updated module1 code

     var module2=require('./lib/module2');
     module2.getValue();

Below is my exact code

server.js

     var express = require('express')
   , http = require('http');

     var app = express();

   app.configure(function(){
    app.use(express.static(__dirname + '/public'));
});

   var server = http.createServer(app);

   var io = require('socket.io').listen(server);

    server.listen(8000);

   var cradle=require('cradle');

     new(cradle.Connection)('https://mydomain.iriscouch.com/', 5984, {
                cache: true,
                raw: false
            });


            cradle.setup({
                host: 'mydomain.iriscouch.com',
                cache: true,
                raw: false
              });


              var c = new(cradle.Connection);
              exports.connObj=c;

                 var notifications=require('./lib/Notifications');
                 var notificationId="89b92aa8256cad446913118601000feb";
                 console.log(notifications.getNotificatiosById(notificationId));

Notifications.js

        var appModule=require('../server');
        var connectionObj=appModule.connObj;
        var db = connectionObj.database('notifications');


        exports.getNotificatiosById=function(notificationId){

        db.get(notificationId, function (err, doc) {
    console.log(doc);//im getting output for this line while running server.js file
        return true;
  });

     };

So you have this method:

exports.getNotificatiosById = function (notificationId) {

  db.get(notificationId, function (err, doc) {
    console.log(doc); //im getting output for this line while running server.js file
    return true;
  });

};

There is and inner callback function. In this case it is impossible for getNotificatiosById to return value from inside of db.get. You should probably read this.

I don't know which database system you use, but maybe in the API there is a synchronous version, i.e. db.getSync. Then we could do something like this:

exports.getNotificatiosById = function (notificationId) {

  return db.getSync(notificationId);

};

But basically in NodeJS we almost always use (and want to use) callback functions because of the non-blocking way of executing script. Regardless of your knowledge about this stuff I recommend Introduction to Node.js video in which creator of node explains alot.