example express app without connection pooling (calls mongoclient in each function)

bad.js

var express = require('express');
var mongodb = require('mongodb');
var app = express();

var MONGODB_URI = 'mongo-uri';

app.get('/', function(req, res) { 
  
  // BAD! Creates a new connection pool for every request
  
  mongodb.MongoClient.connect(MONGODB_URI, function(err, db) {
  if(err) throw err;
  
  var coll = db.collection('test');

    coll.find({}, function(err, docs) {
      docs.each(function(err, doc) {
        if(doc) {
          res.write(JSON.stringify(doc) + "\n");
        }
        else {
          res.end();
        }
      });
    });
  });  
});

// App may initialize before DB connection is ready

app.listen(3000);
console.log('Listening on port 3000');

I'm just trying to get this working with a Heroku node.js app. But I'm not familiar with ./logger ? can you send an example without?

Hi @surfjedi,

you can just remove line 3 and { server: { logger: logger(MONGODB_URI) } } from the connect() and it will work properly! Please note that this example is what you DON'T want to do. You can find my example of the proper way to connection pool here: https://gist.github.com/chrischang12/6757209

Feel free to email me anytime if you have questions