Node.js as a solid pillar of your web/mobile app

Tomasz Banasiak

Node.js - A solid pillar for your web/mobile app.

WHo i am?

Node.js - A solid pillar for your web/mobile app.

NODE.js IN RST

Here we go!

Node.js - A solid pillar for your web/mobile app.

TO BE OR NOT TO BE...

Node.js - A solid pillar for your web/mobile app.

$db = $this->getDatabase();

$query = 'SELECT giant_field, COUNT(field) AS counter
    FROM massive_table mt
    LEFT JOIN even_bigger_table ebt ON mt.field1 = ebt.field2
    WHERE ebt.field3 = \'Zosia\'
    ORDER BY mt.date DESC
    HAVING counter > 1000';

$result = $db->query($query)->fetchAll();

Node.js - A solid pillar for your web/mobile app.

Node.js - A solid pillar for your web/mobile app.

Is this something to really deal about?

Node.js - A solid pillar for your web/mobile app.

What SERVER's CPU is doing

Node.js - A solid pillar for your web/mobile app.

What about THE REST?

Process

request

Query

Database

Fetching

Result

Process

Response

Send 

Response

Node.js - A solid pillar for your web/mobile app.

Server is waiting for the I/O

Node.js - A solid pillar for your web/mobile app.

Node.js - A solid pillar for your web/mobile app.

Node.js - A solid pillar for your web/mobile app.

EVENT LOOP CPU UTILIZATION

• JuSt small gaps for context switching

• One thread, many consequent requests

• Separated IO operations

Node.js - A solid pillar for your web/mobile app.

var mysql = require('mysql');
var db = mysql.connection('user:pass@localhost:3306/nodetest1');

var sql = 'SELECT giant_field, COUNT(field) AS counter
    FROM massive_table mt
    LEFT JOIN even_bigger_table ebt ON mt.field1 = ebt.field2
    WHERE ebt.field3 = \'Zosia\'
    ORDER BY mt.date DESC
    HAVING counter > 1000';

db.query(sql, function(data) {
    response.setData(data);
    response.send();
}

Node.js - A solid pillar for your web/mobile app.

PROBLEM?

Node.js - A solid pillar for your web/mobile app.

app.get('/user/:userId', function(req, res, next) {
    db.get('users', userId, function(err, user) {
        /** code **/
        callbackCounter++;
        locals.user = user;
        if (callbackCounter == 2) {
            res.render('user-profile', locals);
        }
    });
    db.query('posts', {userId: userId}, function(err, posts) {
        /** code **/
        locals.posts = posts;
        callbackCounter++;
        if (callbackCounter == 2) {
            res.render('user-profile', locals);
        }
    });
});

Node.js - A solid pillar for your web/mobile app.

ASYNC.js

Node.js - A solid pillar for your web/mobile app.

app.get('/user/:userId', function(req, res, next) {
  async.parallel([
    function(callback) {
      db.get('users', userId, function(err, user) {
          locals.user = user;
          callback();
        });
    },
    function(callback) {
      db.query('posts', {userId: userId}, function(err, posts) {
         locals.posts = posts;
         callback();
      });
    }
 ], function(err) { 
      if (err) return next(err); 
      res.render('user-profile', locals);
   });
});

NODE.jS VS.  OTHERS

Node.js - A solid pillar for your web/mobile app.

One request memory usage

Source: jsconf.eu/2014

Node.js - A solid pillar for your web/mobile app.

Node.js vs Apache2

Node.js - A solid pillar for your web/mobile app.

Node.js vs Apache2

Node.js - A solid pillar for your web/mobile app.

IS NODE.js PERFECT SOLUTION FOR ALL PROBLEMS?

Node.js - A solid pillar for your web/mobile app.

NODE.js IS PERFECT SOLUTION FOR:

• One-to-many notifications

• Middleware, eg. for socket.io

• SPA application backend

• Lots of short, non CPU-heavy tasks

• Event bus

Node.js - A solid pillar for your web/mobile app.

NODE.js IS Nice SOLUTION FOR:

• Lightweight backend for mobile apps

• embedded software for raspberry pi

• arduino controller backend

• every kind of chat applications

• server processing monitor

• STANDALONE APPS :) 

Node.js - A solid pillar for your web/mobile app.

NODE.js IS WRONG SOLUTION FOR:

• Handle mainly all backend services

• Uplodad/serve large files (but they're about to fix it)

• loadbalanced services

• CDN services

• Computation services

Node.js - A solid pillar for your web/mobile app.

NODE.js IS STILL A REALLY YOUNG TECHNOLOGY

• Created in 2009

• First "usable" release in 2011

Node.js - A solid pillar for your web/mobile app.

NODE.js IS FUTURE TECHNOLOGY

• JAVASCRIPT IS A RISING POWER

• NATIVE OPERATION ON ANY DEVICE

• LOW LEARNING CURVE

Node.js - A solid pillar for your web/mobile app.

NODE.js IS FUTURE TECHNOLOGY

• Java            +4,2%

• C#              +3,4%

• .NET             +10,1%

• PHP              +8,8%

• Node.js/JS +21,6% 

• Android     +12,4%

careers.stackoverflow.com

Node.js - A solid pillar for your web/mobile app.

NODE.js IS FUTURE TECHNOLOGY

http://adambard.com/blog/top-github-languages-2014/

Node.js - A solid pillar for your web/mobile app.

NODE.js SUCCESS STORIES

Node.js - A solid pillar for your web/mobile app.

PayPal

https://www.paypal-engineering.com/2013/11/22/node-js-at-paypal/

• Written in 33% fewer lines of code

• Constructed with 40% fewer files

Node.js - A solid pillar for your web/mobile app.

PayPal

https://www.paypal-engineering.com/2013/11/22/node-js-at-paypal/

Node.js - A solid pillar for your web/mobile app.

PayPal

https://www.paypal-engineering.com/2013/11/22/node-js-at-paypal/

• Double the requests per second vs. the Java application

• 35% decrease in the average response time

• FROM 1 TO 12 Node apps IN six months

Node.js - A solid pillar for your web/mobile app.

PayPal

Node.js - A solid pillar for your web/mobile app.

GROUPON

https://engineering.groupon.com/2014/misc/shopping-cart/

• EASILY HANDLING 50K REQS/MIN WITH HALF OF USED HARDWARE

• 45% decrease in the average response time

• WHOLE SHOPPING PROCESS HANDLED BY Node.js

Node.js - A solid pillar for your web/mobile app.

WALLMART

http://thechangelog.com/116/

• 55% of all traffic  on black friday went to Node.js servers 

• Not a single Node server went down. Zero.

• cpu loads hovered around 1-2%

• Developers were so bored that day :)

Node.js - A solid pillar for your web/mobile app.

STILL NOT CONVINCED?

https://github.com/joyent/node/wiki/Projects,-Applications,-and-Companies-Using-Node

Node.js - A solid pillar for your web/mobile app.

There's an alternative!

Node.js - A solid pillar for your web/mobile app.

There's an alternative!

Node.js - A solid pillar for your web/mobile app.

There's an alternative!

import ( "io/db", "fmt", "http" )
func main() {
    err, user := db.get('users', userId)
    err, posts := db.query('posts', 
        fmt.Concat('user_id = ',userId)
    )
    http.response := render(user, posts)
    http.send()
    http.close()
}
    

Node.js - A solid pillar for your web/mobile app.

There's an alternative!

Python + twisted

RUBY + EVENT MACHINE

ESB WSO2

BUT THIS IS STILL JUST A MIDDLEWARE..

VERTX JVM

Node.js - A solid pillar for your web/mobile app.

ESB WSO2 VS NODE.jS

• Powerful

• Elastic

• Universal

• HEAVY

• java

• DO WE NEED THIS?

• Powerful

• Elastic

• JSON

• LIGHTWEIGHT

• NPM PACKAGES

• MODERN TECHNOLOGY

• BUT IMMATURE

Node.js - A solid pillar for your web/mobile app.

ESB WSO2 VS NODE.jS

Node.js - A solid pillar for your web/mobile app.

Node.js - A solid pillar for your web/mobile app.

Questions?

Thank you!

Tomasz Banasiak

Email:  tomasz.banasiak@rst.com.pl

WEB:     http://banasiak.pro