node.js event listener in another source file
<p>I am trying to design a scenario where on a particular event getting triggered, I wanted a few listeners to perform some task. Trying to also manage S.R.P of code, I want to have the listeners in a different source file. I want to know if this is possible using event Emitter. Does event emitter only work on a single source file?</p>

<pre><code>var events = require('events');
var em = new events.EventEmitter();

exports.saveScheme = function (req, res) {  

var dal = dalFactory.createDAL(constants.SCHEME);
return new Promise.resolve(dal.PromiseSave(req.body))
    .then(function(data){
        var schemeId = data._id;

        em.addListener('FirstEvent', function (data) {
            console.log('First subscriber: ' + data);
        });
        em.emit('FirstEvent', 'Test event emitter');

    }).catch(function(error){
        console.log(error);
    }); 
};
</code></pre>

<p>My other source file is </p>

<pre><code>var emitter = require('events').EventEmitter;
var em = new emitter();

//Subscribe FirstEvent
em.on('FirstEvent', function (data) {
    console.log('First subscriber: ' + data);
});
</code></pre>