Kraken js at paypal

In the Enterprise
By Lenny Markus
@LennyMarkus

 Teams stopped waterfall process
 Started agile with Lean UX
 Quick iterations; experience design
early
White
Board
CodeUsers
PayPal: Circa 2012

 Using CSS, JavaScript and Templates
(in the wrong way…)
(Written in Java…)
Embracing the right technologies

 Replaced JSP with dust.js
templating
 Node.js for mock applications
Speeding up the process

Speeding up the process…
Idea  Prototype in hours
This combo was fast!

“Node.js is not enterprise”
 It’s a toy language
 Not scalable
 Insecure
 Slow
 Blah
 Blah
 Blah
 Blah

Project Kraken
 Bringing Node.Js into PayPal
 Focused on Web/Mobile Applications
 Emphasize developer velocity
 Replace our Java UI technology stack

If you're having
trouble getting
sign-off on new
technology, then
try to pilot it vs.
the old.
Pilot projects are harmless

• Identify Project
• Begin integrating Node with
infrastructure
January
• Initial infrastructure
offering ready
• Started development
on pilot
March
• Node Pilot surpassed Java
• Java put on hold
June
The pilot timeline

Pilot Results – Lines of Code
Node Java
7,403
18,68
3

Pilot Results – Files
Node Java
84 255

/**
If you’re reading this,
that means you have been
put in charge of my
previous project.
I am so, so sorry for
you. God speed.
*/
// Houston,
// we have a problem
// TODO: make this work
// Magic. Do not touch.
//Catching exceptions
// is for communists
/* ALL YOUR BASE ARE
BELONG TO US */
Pilot Results – Comments
Node Java
626
10,31
0

Pilot Results – Developers
Node Java
2 12

Node frameworks at scale
Needed to support thousands of
devs

Node frameworks at scale
190+ Countries

Kraken.js
Lusca
Kappa
Localizr
Internationalization
Application Framework
Application Security
NPM Proxy
Generator-Kraken
Yeoman Generator
Meddleware
Config driven
middleware

Kraken.js – A node.JS web application framework

Kraken.js
express + + +
 PayPal’s Home-grown Node.JS
framework
 Supports for globalization
 Out-of-the-box security
 Robust configuration
 Scalable

Generator-kraken
A yeoman
generator that
allows you to
quickly create
scaffolding for
kraken
applications.• `yo kraken`
• Application
• Pages
• Controllers
• Content Bundles
• Tests
• Models
$ yo kraken myApp
,'""`.
hh / _ _
|(@)(@)| Release the Kraken!
) __ (
/,'))((`.
(( (( )) ))
` `)(' /'
Tell me a bit about your application:
? Description: A test application
? Author: @LennyMarkus
? Template library? Dust
? Front end package manager ? Bower
? CSS preprocessor library? LESS
? JavaScript library? RequireJS

Nothing but express.
var express = require(‘express’),
kraken = require(‘kraken-js’);
var app = module.exports = express();
app.use(kraken());
app.on('start', function () {
console.log('Application ready to serve requests.');
});
Kraken.js

Clean, maintainable layout.
index
Content
Kraken.js

var dbHost;
if (process.env.NODE_ENV === ‘production’) {
dbHost = “myinstance.12.us-1.rds.amazonaws.com”;
}
else {
dbHost = “localhost”;
}
db.connect(dbHost);

{
"port":80,
"express":{
"views":"path:./myViews"
}
}
{
"port":8080,
"express":{
"views":"path:./experimentation"
}
}
NODE_ENV=production
Environment-aware configuration
Kraken.js
NODE_ENV=development

{
“port”:80,
“foo”:”bar”,
“color”:”red”,
“db”:{
“host”:”localhost”,
“port”:”3306”
}
}
config.json
{
“port”:80,
“foo”:”bar”,
“color”:”red”,
“db”:{
“host”:”myinstance.12.us-1.rds.amazonaws.com”,
“port”:”3306”
}
}
development.json
{
“db”:{
“host”:”localhost”,
}
}

var dbHost = config.get(“db:host”);
db.connect(dbHost);

Config driven middleware
 Middleware setup is not hardcoded
 External to codebase!
 Can be toggled / ordered / configured.

“middleware”: {
“authentication”:{
"enabled": false
}
config.json
“middleware”: {
“authentication”:{
"priority": 100,
"enabled": true,
"module": {
"name": “passport"
}
}
development.json

Lusca
• Enables Platform for Privacy Preferences Project (P3P)
headers.
• Enables X-FRAME-OPTIONS headers to help prevent
Clickjacking.
• Enables Content Security Policy (CSP) headers.
• Enables Cross Site Request Forgery (CSRF) headers.
Enables out-of-the-box security according to industry (and
PayPal's ) best practices. This is done as middleware, so that
all your requests/responses are automatically secured.

Localizr– Internationalization
(i18n)
• Load content bundles
from a specific
location
• Can localize
templates on-the-fly
• Content stored in
properties files
An extension for dust.js templates that enables localization /
internationalization data to be loaded, and decorated on top of a
template.

Localizr– Internationalization
(i18n)
index.title=PayPal for Merchants
index.callToAction=Enroll now!
index.greeting=Welcome {user}
# A list
index.ccList[0]=Visa
index.ccList[1]=Mastercard
index.ccList[2]=Discover
# A map
index.states[AL]=Alabama
index.states[AK]=Alaska
index.states[AZ]=Arizona
index.states[CA]=California
index.title=PayPal pour commerçants
index.callToAction= Inscrivez-vous!
index.greeting=Bonjour {user}
# A list
index.ccList[0]=Visa
index.ccList[1]=CIBC
# A map
index.states[ON]=Ontario
index.states[AB]=Alberta
index.states[MB]=Manitoba
index.states[QC]=Quebec
locales/US/en/index.properties locales/CA/fr/index.properties

Kappa– Your very own NPM
NPMJS.or
g
npm.intranet
.company.co
m
{
"dependencies": {
"express": "~3.4.0",
“privateMod”: “1.0.0”
}
}

Custom Infrastructure
We all have
some.
Always aim to use
standard
conventions in your
Node.js code.

Culture Clash – OSS vs. Closed
 Stop "not written here" syndrome
 Versions often times aren't >= 1.0
 Collect knowledge from
community
 GitHub exposes sacred code

Hiccups found along the way…

KrakenJS. Released!
@LennyMarkus
lmarkus@paypal.com

Kraken js at paypal

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Editor's Notes