proud to be polyglot - riviera dev 2015

Proud to be Polyglot!Tugdual Grall @tgrall

June 11, 2015

Modern Applications• Modern Applications Must

• Manage any type of data • Scale • Be fault tolerant • Adapt to change

Current Architecture• Mono-Technology

• Single “language/architecture” • Single Database : RDBMS

• One size fits all approach

JSP/JSFServices

MessagingJTA

DAO/JPA

Is it good for me?• Many Files

• XML, Sources, Configuration, … • Does Hibernate/JPA is good for all?

• Impedance mismatch • Need to scale

• From 0 to 50 millions users in 6 weeks • 1Tb of data each day

• How easy is to add new features? • Changing code, updating data structure, … • And all this for yesterday !

One size does NOT fit all!

Let’s look at our data…

Big Data

Big Users

http://www.theconnectivist.com/ & Cisco

. . .App Server

Application

Scale out Add more “Web” servers

Scale Up Get bigger server

Stay up!…. and Scale

Scaling out RDBMS• Run many RDBMS Servers

• Data could be partitioned • Done by the application code

• Caching Layer

. . .App Server

. . .Memcached

. . .MySQL

NoSQL to Scale Out!

App Server

Application

Scale out Add more “Web” servers

Scale Out Add more servers

Operational vs Analytics Databases

Warehouse, AnalyticsApplications, Interactions

Polyglot Persistence

Big Data/Analysis NoSQL RDBMS

• Log Capture• Recommendations• Predictions• Ad Campaign

• Products• User Profiles• Game Actions• Sessions• Shopping Cart

• Financial Data• Reporting

Data Service Layer• Wrap data call in Services

– loosely coupled

. . .App Server

Use Case : Personalization

WebSite / Application

Personalization Database

Data Processing

Application

Use Case : Mobile / API

PIM Database

• Legacy Application

• Product Information

• REST API

• Product Data

• Additional Metadata

Now What? Now What?

Why multiple languages?• Sometimes we have no choice

• HTML/CSS/JavaScript + Server Side • Mobile Native Applications

• Java/.Net are slow movers • Java EE 5.0 is still mainstream (2006!!)

• Many languages and frameworks • Scala, Clojure, Groovy, Dart, Go, Ruby, Python, F#, Erlang,

Node.js, Rails, Play!, Grails, ...

Examples• Realtime interaction with WebSockets :

• Wait for Java EE 7 to supported by your IT? • Hack your app server and application with Continuation ? • Use Node.js and Socket.io ?

• Data Collection and Treatment? • Find a library? • Create your library? • Use Java 8 and Lambdas? • Use Scala?

Examples• Simple CRUD Application

• Use the JavaEE stack with JPA and JSF? • Use Spring ? • Use tools like Play!, Grails, Rails, MEAN ?

How to chose?• Maturity/Supportability • Features Set • Learning Curve • Productivity

Use Case : Second Screen Experience

. . .Node.js + Socket IO

Play! ApplicationPython Scripts

Use Case : Recommendation

WebSite / Application

Machine Learning / Recommendation

Data Processing

User Activity Application

Demonstration

Conclusion• Use the good tool for the good task

• Do not try to “hack” something when you have a simpler solution

• Think about your users first... so deliver and get feedback • Learning is part of our job !

• And this will help you and your project • What about maintenance?

• Do you think it is easier to maintain complex old code?

Questions

Proud to be Polyglot!Tugdual Grall @tgrall

June 11, 2015

proud to be polyglot - riviera dev 2015

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