This document provides an overview of the Play 2 Java framework, including: - A brief introduction to Play and how it allows building web apps with Java and Scala in a lightweight, scalable way based on Akka - A live coding demo showing building a basic app that retrieves user data from GitHub's API - Discussion of deploying the demo app to Heroku cloud platform - Recommendation to ask further questions later via email

1. 2 Java
@basav

2. Agenda
• Introduction to Play 2 Java framework
• Live Coding
• Deployment to Cloud
• QA

3. Who am I?
Software Architect
Entrepreneur
Web 2.0 JavaScript

4. WE ARE STARTING A NEW
PROJECT !YAY!

5. I AM READY TO CODE IT UP!!

6. STACK? What about POLYGLOT?
DILEMMA !!!

7. SON !! TRUST ME!
JAVA IS THE SAFE CHOICE!
Many come back (think
Twitter)
But there is a curse…

8. The risk of dying - waiting for server
start, complex tooling, redeployment,
maintaining XML, HTTPSession ..etc

9. CAN YOU HAVE YOUR CAKE AND
EAT IT TOO?

10. YES !!

11. Who is using Play?

12. What is Play?
• Easy to build web applications with Java & Scala.
• Based on a lightweight, stateless, web-friendly
architecture.
• Built on Akka, Play provides predictable and
minimal resource consumption (CPU, memory,
threads) for highly-scalable applications

13. History
• Play 1 Created By
Guillaume Bort at
Zengularity SA in 2007
• Play 2 release in 2012 by
Typesafe (rewrite using
Scala)
• Part of Typesafe Activator

14. Philosophy
• Build for Asynchronous
Programming
• Focused on Type Safety
• Native support for Java and
Scala
• Powerful Build System
• Datastore and Model
Integration

15. Full Stack Framework
• HTTP Server (Netty)
• Routing
• Body Parsers
• Action composition
• Security
• Caching
• Database
• i18n
• Dependency Injection
• Template engine (HTML,
XML...)
• HTTP forms (bindings,
validation)
• JSON, XML
• Javascript Closure Compiler
• Coffeescript, Less

16. Twelve-Factor Manifesto
1. Codebase
2. Dependencies
3. Config
4. Backing Services
5. Build, release, run
6. Processes
7. Port binding
8. Concurrency
9. Disposability
10. Dev/prod parity
11. Logs
12. Admin processes
http://12factor.net/

17. Lets CODE

18. Pre-Requisites
• Download (typesafe-activator - Play 2.4.2) from
• https://playframework.com/download
• Add activator your PATH
• activator new

19. IDE & JDK Support
• Play 2.4.2 is only supported JDK 8 onwards
• IntelliJ IDE
• Import as an SBT project
• Eclipse
• activator eclipse

20. Basic Demo

21. Whats the Usecase?
User
Service
GET /github/:username
User
Controller
GITHUB
User
Repository
GET /users/list/
https://api.github.com
create(User)
update(User)
getAllUsers
allUsers():List<User>
Route Test
Functional Test
Integration Test
Unit Test
Github
Service
findUser():User
Unit Test
save(User)

22. Coding..

23. Heroku Deployment
• Install the Heroku Toolbelt
• Write a Procfile
• $ git init
• $ git add .
• $ git commit -m “init"
• heroku create
• git push heroku master

24. Code on Github
https://github.com/basav/MyApp

25. or ask back later
bnagur@gmail.com

26. Thank You!
@basav