OpenShift Restify NodeJS server module

server.js

#!/bin/env node
//  OpenShift NodeJS Restify Server
var restify = require('restify');

/**
 *  Define the basic server.
 */
exports = (function() {

    //  Scope.
    var self = this;


    /*  ================================================================  */
    /*  Helper functions.                                                 */
    /*  ================================================================  */

    /**
     *  Set up server IP address and port # using env variables/defaults.
     */
    self.setupVariables = function() {
        //  Set the environment variables we need.
        self.ipaddress = process.env.OPENSHIFT_INTERNAL_IP;
        self.port      = process.env.OPENSHIFT_INTERNAL_PORT || 8080;

        if (typeof self.ipaddress === "undefined") {
            //  Log errors on OpenShift but continue w/ 127.0.0.1 - this
            //  allows us to run/test the app locally.
            console.warn('No OPENSHIFT_INTERNAL_IP var, using 127.0.0.1');
            self.ipaddress = "127.0.0.1";
        };
    };

    /**
     *  terminator === the termination handler
     *  Terminate server on receipt of the specified signal.
     *  @param {string} sig  Signal to terminate on.
     */
    self.terminator = function(sig){
        if (typeof sig === "string") {
           console.log('%s: Received %s - terminating sample app ...',
                       Date(Date.now()), sig);
           process.exit(1);
        }
        console.log('%s: Node server stopped.', Date(Date.now()) );
    };

    /**
     *  Setup termination handlers (for exit and a list of signals).
     */
    self.setupTerminationHandlers = function(){
        //  Process on exit and signals.
        process.on('exit', function() { self.terminator(); });

        // Removed 'SIGPIPE' from the list - bugz 852598.
        ['SIGHUP', 'SIGINT', 'SIGQUIT', 'SIGILL', 'SIGTRAP', 'SIGABRT',
         'SIGBUS', 'SIGFPE', 'SIGUSR1', 'SIGSEGV', 'SIGUSR2', 'SIGTERM'
        ].forEach(function(element, index, array) {
            process.on(element, function() { self.terminator(element); });
        });
    };

    self.setup = function() {
        self.setupVariables();
        self.setupTerminationHandlers();
        self.ready = true;
    }

    return {
        setup: self.setup,
        server: function(){
            if(arguments.length>0 || !self.server){
                !self.ready && self.setup();
                self.server = restify.createServer(arguments);
            }
            return self.server;
        },
        start: function() {
            !self.server && module.exports.server();
            //  Start the app on the specific interface (and port).
            self.server.listen(self.port, self.ipaddress, function() {
                console.log('%s: Node server started on %s:%d ...',
                Date(Date.now() ), self.ipaddress, self.port);
            });
        }
    };
})()