db.js

function Database(mysql,config){
  this.mysql = mysql;
  this.config = config;
  
  // setup mysql connection based on config
  
}

Database.prototype.get = function(){
  // return an open mysql handle
  // if mysql has re-connected, make sure 
  // you're returning the active connection
}

module.exports.inject = function(di){
  return new Database(di.mysql,di.config);
}

server.js

var di = {};

di.config = require('./config');

// pass in the actual mysql library
di.mysql = require('mysql');

// setup your database
di.database = require('./database').inject(di);

// your app will have a fully connected database
di.app   = require('./app').inject(di);

Looking forward to that blog post :)

@diogogmt I have a draft here

https://gist.github.com/jacobgroundwater/ae7d6a4af43b71fed82a

I would appreciate any feedback you have. I'll publish to my blog later, once I get polish it up.