node module patterns quandry for server

AnonymousPrototypeInvocation.js

var Server = require('./../AnonymousPrototypeModule.js');
console.log("this server is a "+typeof Server); // returns this server is a function
console.log(Object.getOwnPropertyNames(Server)); // [ 'length', 'name', 'arguments', 'caller', 'prototype' ]

var server = new Server();
console.log("this invoked server is a "+typeof server); // returns this invoked server is a object
console.log(Object.getOwnPropertyNames(server)); // returns []

AnonymousPrototypeModule.js

var Server = function(){};

Server.prototype.commence = function(){
    console.log("starting server");
    Server.server = http.createServer(function(req,res){

        res.writeHead(200,{'Content-Type': 'text/plain'});
        res.end('Hello, world!\n');
    });
}

Server.prototype.listen = function(){
    Server.server.listen.apply(Server.server, arguments);
}

Server.prototype.close = function(callback){
    Server.server.close(callback);
}


module.exports = Server;

NamedFunctionExport.js

function Server(){}

Server.commence = function(){
    console.log("starting server");
    Server.server = http.createServer(function(req,res){

        res.writeHead(200,{'Content-Type': 'text/plain'});
        res.end('Hello, world!\n');
    });
}

Server.listen = function(){
    Server.server.listen.apply(Server.server, arguments);
}

Server.close = function(callback){
    Server.server.close(callback);
}

module.exports = Server;

NamedFunctionInvoke.js

var Server = require('./../NamedFunctionExport.js');
CentrifugeServer.commence();
console.log("this server is a "+typeof CentrifugeServer); // returns this server is a function
console.log(Object.getOwnPropertyNames(CentrifugeServer)); // returns [ 'length','name','arguments','caller','prototype','commence','listen','close','server' ]
CentrifugeServer.listen(8000);