Express Boostrapping

app.js

var express = require('express')
  , path = require('path');

process.on('uncaughtException', function (err) {
  console.log('uncaught exception:--------------------------------------------- ' );
  console.log( err + err.stack);
});

mainServer = module.exports = express.createServer(); 
mainServer.set('path', __dirname);

exports.boot = function (app, next) {

  var lib_path = path.join(app.settings.path, 'lib'); 

  require( path.join(lib_path, 'settings') ).bootConfiguration(app)
                                          .bootErrorConfig(app);

  require( path.join(lib_path, 'models') ).bootModels(app, function (err) {

    if (!err) {

      require( path.join(lib_path, 'controllers') ).bootControllers(app, function(err){

        if (!err) {

            next();

        } else {

          console.log('Exception either loading controllers files' );

        }
                                                                   
      });

    } else {

      console.log('Exception either loading model files or mongo connection' );
    }

  });

}

if (!module.parent) { 

  exports.boot(mainServer, function(  ) {
    mainServer.listen(process.env.PORT || 3000);
    console.log("Express server listening on port %d in %s mode", mainServer.address().port, mainServer.settings.env);
  });

}