nodejs pubsub

var events = require('events');
var eventEmitter = new events.EventEmitter();

function mainLoop () {
    console.log('starting application');
    eventEmitter.emit('ApplicationStart');
    console.log('Running application');
    eventEmitter.emit('ApplicationRun');
    console.log('Stooping application');
    eventEmitter.emit('ApplicationStop');
}
function onApplicationStart() {
    console.log('Handling Application Start Event');
}
function onApplicationRun () {
    console.log('Handling Application Run Event');
}
function onApplicationStop () {
    console.log('Handling Application Stop Event');
}
eventEmitter.on('ApplicationStart', onApplicationStart);
eventEmitter.on('ApplicationRun', onApplicationRun);
eventEmitter.on('ApplicationStop', onApplicationStop);