express.js single instance

express.js single instance

in express.js

var global_app;
function createApplication(ifglobal) {
	if(ifglobal && global_app){
		return global_app;
	}
  var app = function(req, res, next) {
    app.handle(req, res, next);
  };

  if(!global_app)global_app=app;
  //below not change anything

  mixin(app, EventEmitter.prototype, false);
  mixin(app, proto, false);

  app.request = { __proto__: req, app: app };
  app.response = { __proto__: res, app: app };
  app.init();
  return app;
}


main.js
var express = require('express');
var app = express();

route.js
var express = require('express');
var app = express(true);  //will return the same app ,so you can use it anywhere