2 Java

@basav

Agenda

• Introduction to Play 2 Java framework

• Live Coding

• Deployment to Cloud

• QA

Who am I?

Software ArchitectEntrepreneur

Web 2.0 JavaScript

WE ARE STARTING A NEW PROJECT !YAY!

I AM READY TO CODE IT UP!!

STACK? What about POLYGLOT? DILEMMA !!!

SON !! TRUST ME!JAVA IS THE SAFE CHOICE! Many come back (think

Twitter)

But there is a curse…

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

CAN YOU HAVE YOUR CAKE AND EAT IT TOO?

YES !!

Who is using Play?

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

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

Philosophy• Build for Asynchronous

Programming

• Focused on Type Safety

• Native support for Java and Scala

• Powerful Build System

• Datastore and Model Integration

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

Twelve-Factor Manifesto1. 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/

Lets CODE

Pre-Requisites

• Download (typesafe-activator - Play 2.4.2) from

• https://playframework.com/download

• Add activator your PATH

• activator new

IDE & JDK Support

• Play 2.4.2 is only supported JDK 8 onwards

• IntelliJ IDE

• Import as an SBT project

• Eclipse

• activator eclipse

Basic Demo

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 TestFunctional Test

Integration TestUnit Test

GithubService

findUser():User

Unit Test

save(User)

Coding..

Heroku Deployment• Install the Heroku Toolbelt

• Write a Procfile

• $ git init

• $ git add .

• $ git commit -m “init"

• heroku create

• git push heroku master

Code on Github

https://github.com/basav/MyApp

or ask back laterbnagur@gmail.com

Thank You!

@basav