Play Framework

Intro to Play Framework &

Modern Java Web App Development

Josh Padnick

Desert Code Camp 2013.2

November 9, 2013

Todays Talk

Java Web App Development Today

Modern Web App Development

Meet Play Framework

Build Stuff!

Founder & Chief Innovation Officer at Omedix

10+ years of web app development

Special interest in scalable, enterprise, web-based applications using Java & open source

Josh Padnick

Java Web App

Development Today

Challenges of^

Lots of Time Waiting for Server Redeploys

SOURCE FOR INSIGHT: The Play Framework at LinkedIn: Productivity and Performance at Scale by Yevjeniy Brikman http://www.youtube.com/watch?v=8z3h4Uv9YbE

!SOURCE FOR GRAPHIC: http://zeroturnaround.com/rebellabs/java-ee-productivity-report-2011/#redeploy_times

Long, Ugly Error Messages

SOURCE: FOR INSIGHT: The Play Framework at LinkedIn: Productivity and Performance at Scale by Yevjeniy Brikman http://www.youtube.com/watch?v=8z3h4Uv9YbE

!SOURCE FOR GRAPHIC: http://ptrthomas.wordpress.com/2006/06/06/java-call-stack-from-http-upto-jdbc-as-a-picture/

!

MVC Action

AOP TX Proxy

Business Logic

DAO

Spring-Hibernate

Hibernate

JDBC

Spring WebFlow

Acegi

Spring MVC

Tomcat / JBoss

! mvc org.springframework.web.servlet.DispatcherServlet contextClass org.springframework.web.context.support.AnnotationConfigWebApplicationContext ! contextConfigLocation com.zt.helloWeb.init.WebappConfig ! 1 ! ! mvc / ! / ! DefaultServletHandler

Crazy XML Configuration

SOURCE FOR INSIGHT: The Play Framework at LinkedIn: Productivity and Performance at Scale by Yevjeniy Brikman http://www.youtube.com/watch?v=8z3h4Uv9YbE

Bean Failuresorg.omg.CORBA.OBJECT_NOT_EXIST

SOURCE FOR GRAPHIC: Beginning Java EE 6 Platform with Glassfish 3 by Antonio Goncalves, Page 5.

X

Clunky Road to

RESTful URLs

WEB.XML springmvc /rest/* !CONTROLLER.JAVA @Controller @RequestMapping("/people") public class PeopleController { ! @RequestMapping(entrypoint/{collectionName}, method=RequestMethod.GET) public @ResponseBody String getPeople() { return GsonFactory.getInstance().toJson(LookupDao.getInstance().getPeople()); } ! @RequestMapping(value="{id}", method=RequestMethod.GET) public @ResponseBody String getPerson(@PathVariable String id) { return GsonFactory.getInstance().toJson(LookupDao.getInstance().getPerson(id)); } }

A Lot of Complexity!

I just want to write working software!

Is this the architecture we would create today?

The root of the problem

Impedance Mismatch between

HTTP and Java EE!

RESTful URLs vs. Java Servlets SpecImpedance Mismatch

Stateless HTTP vs. Stateful EJBs

SOURCE: http://cscie12.dce.harvard.edu/lecture_notes/2011/20110504/handout.html

SOURCE: Beginning Java EE 6 Platform with Glassfish 3 by Antonio Goncalves, Page 206.

Impedance Mismatch

Impedance Mismatch

Code & Refresh vs. WAR Deployment

Modern Web App Development

Buzzwords! HTML5 & Javascript

MVVM Frameworks

Mobile

NoSQL

Real-Time

Big Data

Asynchronous

Immutability

Connected Devices

Reactive Softwarehttp://www.ReactiveManifesto.org/

The Reactive ManifestoUp to now the usual way to describe this type of application has been to use a mix of technical and business buzzwords; asynchronous, non-blocking, real-time, highly-available, loosely coupled, scalable, fault-tolerant, concurrent, reactive, event-driven, push instead of pull, distributed, low latency, high throughput, etc. This does not help communication, quite the contrary, it greatly hinders it.

SOURCE: http://typesafe.com/blog/why_do_we_need_a_reactive_manifesto

Jonas Bonr

Reactive Software

SOURCE: http://www.ReactiveManifesto.org/

Meet Play Framework

Goal: Performance + Productivity

Performance

Prod

ucti

vity

SOURCE: http://typesafe.com/blog/webinar-a-java-developers-primer-to-the-typesafe-platform

No More JEE Container

SOURCE: Play for Java by Nicolas Leroux and Sietse de Kaper

Focused on Developer Productivity Live code changes when you refresh the browser

More friendly error messages directly in browser

Type safety in the templates

Cool console & build tools

Designed for the Modern Web RESTful by default

Auto-compile LESS and CoffeeScript files

JSON is a first-class citizen

Websockets, other HTTP Streaming Support

Stateless and Built for Scale Forces every aspect of your app to be stateless

Non-Blocking I/O

Well-suited for real-time

What exactly is it, though?

SOURCE: Play for Java by Nicolas Leroux and Sietse de Kaper

What exactly is it, though?Integrated HTTP Server

JBoss Netty (Non-Blocking IO)

Concurrent, Distributed, Fault-Tolerant

Background Processing

Akka

Build System &

Console

SBT

Java Virtual Machine

Template Engine, HTTP Request/Response Processing, Integrated Cache, RESTful Routing Engine, Asset Compilation,

Internationalization, Testing Tools

Play Framework

eBean / Anorm BoneCP

H2 Database Lots of libraries

Of course, nothings perfect1. You can mostly avoid Scala, but not completely

(of course, Scala itself is pretty cool)

2. For advanced build logic, SBT has a steep learning curve

3. Template system works well, but sometimes the functional paradigm can feel awkward

Lets around!

Intro Stuff1. Download and install

2. Play Console

3. Controllers

4. URL Routing

5. Templates

Lets Build Something

in the Time Remaining

So what did you like best today? Well take some votes and show the results real-time

Learning Play Framework I preferred the books to the documentation

For official documentation, best formatting is on playframework.com. Latest content is on github(https://github.com/playframework/playframework/tree/master/documentation/manual)

Community itself is pretty great

Google Group is great

Lots of questions on Stack Overflow

Check Out TypeSafe Activator

Play Framework

Documents

Transcript of Play Framework