app.js

var express = require('express');

var http = require('http');
var path = require('path');

var app = express();

app.set('port', process.env.PORT || 3000);
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');

app.all('*', function(req, res) {
  res.render('index', {msg: 'Welcome to the Practical Node.js!'})
})

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

var server = http.createServer(app);
var boot = function () {
  server.listen(app.get('port'), function(){
    console.info('Express server listening on port ' + app.get('port'));
  });
}
var shutdown = function() {
  server.close();
}
if (require.main === module) {
  boot();
} else {
  console.info('Running app as a module')
  exports.boot = boot;
  exports.shutdown = shutdown;
  exports.port = app.get('port');
}