server.js

var express = require('express'),
  app = express(),
	favicon = require('serve-favicon'),
	bodyParser = require('body-parser'),
	compress = require('compression'),
	logger = require('morgan'),
	serveStatic = require('serve-static'),
	ejs = require('ejs'),
	path = require('path'),
	config = require('./server/conf/config'),
	mappings = require('./server/conf/mappings'),
  authentication = require('./server/conf/authentication'),
  bootstrap = require('./server/conf/bootstrap'),
  datasource = require('./server/conf/datasource')
;

// CONFIGURE APP
////////////////////////////////

app.disable('x-powered-by');
app.set('port', config.port);
app.set('views', __dirname + config.staticFilesDir);
app.engine('.html', ejs.__express);
app.set('view engine', 'html');
app.use(favicon( path.join( __dirname, config.staticFilesDir, 'favicon.ico'), { maxAge: config.expires.year } ));
if(app.get('env') === 'development' || app.get('env') === 'test'){
  app.use(logger('dev'));
} else if(app.get('env') === 'production') {
  app.use(logger('combined', {
    // remove status codes below 400 from log
    skip: function (req, res) { return res.statusCode < 400 }
  }));
}
// compress response with zlib if required
app.use(compress());
// accept request with json payloads
app.use(bodyParser.json());
// handle static files TODO: switch to nginx in production
app.use( serveStatic( path.join(__dirname, config.staticFilesDir), { maxAge: config.expires.year } ));

// Set up globals for views
////////////////////////////////////////////////////////

app.locals.user = {};
app.locals.errors = [];
app.locals.oauthTwitter = !!config.oauth.twitter.key;
app.locals.oauthGitHub = !!config.oauth.github.key;
app.locals.oauthFacebook = !!config.oauth.facebook.key;
app.locals.oauthGoogle = !!config.oauth.google.key;
app.locals.target = '';

///////////////////

// attach datasource instance
app.db = datasource;

authentication.init(app);

// Setup routes
mappings.init(app);

// Run bootstrap
bootstrap.init(app).done( function(){

  // Finally run the app
  app.listen(app.get('port'), function () {
    'use strict';
    console.log('\n');
    console.log('+--------------------------');
    console.log(' Environment', app.get('env'));
    console.log(' PID %d', process.pid);
    console.log(' Listening on port', app.get('port'));
    console.log('+--------------------------');
  });
});

function exitHandler(options, err) {

  if (err) {
    console.log(err.stack);
  }

  if (options.cleanup && app.db){
    app.db.disconnect(function(){
      console.log('datasource disconnected');
    });
  }

  if (options.exit) {
    if(app.db){
      app.db.disconnect(function(){
        console.log('datasource disconnected');
        process.exit(0);
      });
    } else {
      process.exit(0);
    }
  }
}

// do something when app is closing
process.on('exit', exitHandler.bind(null,{cleanup:true}));

// catches ctrl+c event
process.on('SIGINT', exitHandler.bind(null, {exit:true}));

// catches uncaught exceptions
process.on('uncaughtException', exitHandler.bind(null, {exit:true}));