app.js

/**
 * Module dependencies.
 */

var express = require('express')
    , http = require('http')
    , path = require('path')
    , cluster = require('cluster')
    , numCPUs = require('os').cpus().length;

if (cluster.isMaster) {
    // Fork workers.
    for (var i = 0; i < numCPUs; i++) {
        cluster.fork();
    }

    cluster.on('fork', function (worker) {
        console.log("New worker is being created " + worker.id);
    });

    cluster.on('listening', function (worker, address) {
        console.log("New worker is listening " + worker.id);
    });

    cluster.on('exit', function (worker, code, signal) {
        console.log("worker is exiting " + worker.id);
        cluster.fork();
    });

    cluster.on('online', function (worker) {
        console.log("Yay, the worker responded after it was forked");
    });

} else {


    var app = express();

    app.configure(function () {
        app.set('port', process.env.PORT || 3000);
        app.use(express.bodyParser());
        app.use(app.router);
    });

    app.configure('production', function () {
        app.use(express.errorHandler());
    });

    app.configure('development', function () {
        app.use(express.errorHandler());
    });

    app.get('/', function (request, response) {
        response.send("Hello World");
    });

    app.get("/mu-ae97bc8c-43c68105-588f9d9f-2fe027bd", function (req, res) {
        res.send("42");
    });

    http.createServer(app).listen(app.get('port'), function () {
        console.log("Express server listening on port " + app.get('port'));
    });

}