> play new

Do you knowWeb Application Framework?

Do you knowPlay!> framework?

Do you knowScala?

’’’

[Start]Playing!

@mumoshu

php

java

scala

js

python

perl

0 5 10 15

# of atnders

PHP vs Play

CakePHP

Symfony

Slim

Play!>

PHP

<- thin rich ->

CakePHPCakePHPCakePHP

Play!>Play!>

Symfony

CakePHP

Play!>

Symfony

CakePHP

Play!>

Symfony

CakePHP

Play!>

Symfony

CakePHP

Play!>

Symfony

CakePHP

Play!>

naked?

Play is

• A web application framework

• Ease common tasks in web dev

Play basics

•Easy start•Simple development•Scala

Play basics

•Easy start•Simple development•Scala

How to start

•Download•Unzip•play new

Play basics

•Easy start•Simple development•Scala

How you develop

•play run•Repeat:•Write code!•F5!

Play basics

•Easy start•Simple development•Scala

Scala

• Run on JVM

• A lot of Java libraries

• Hybrid language

• Imperative programming

• Object oriented programming

• Functional programming

’’’

Whats happy with FP

• Concurrency

• Scalability

Imperative vs Functional

• Imperative Programming

do A -> state++,

do B -> state++, ...

• Functional programming

in1 -> f(x) -> out1in2 -> g(x) -> out2

+ concurrency

Easy concurrency

• Imperative programming

do A -> state <- do B

> sudden conflict!!! <

• Functional programming

in1 -> f(x) -> out1, in2 -> g(x) -> out2 > no conflict!!! <

Easy scalability

• Single Playreq -> acion1(x) -> result

req -> acion2(x) -> result...

• Multiple Play’sreq -> play1 -> result

req -> play2 -> result...

Play basics

•Easy start•Simple development•Scala

Play basics

•Easy start•Simple development•Scala

Hopeful!

break1/3

http://pf.gree.jp/56616

　ビースト★ハーレム～野獣の甘噛み～

Play specifics

•Documented•Translated•Pluggable•Statically Typed

Documented

• 0ver 100 pages

• http://playframework.org/

Play specifics

•Documented•Translated•Pluggable•Statically Typed

Translated

• Over 100 pages

• http://playdocja.appspot.com/

Play specifics

•Documented•Translated•Pluggable•Statically Typed

Pluggable

• 27 plugins

• http://www.playframework.org/documentation/2.0.4/Modules

Plugins

• LESS

• SASS

• CoffeeScript

• TypeScript <- Me

• Velocity <- FuRyu

• Memcached <- Me

• Redis

• MongoDB

• etc.

modern web dev with a lot of plugins

Play specifics

•Documented•Translated•Pluggable•Statically Typed

Statically Typed

• Can be freed from

• null/NULL

• Free from

• ReferenceError

• TypeError

• ‘Call to undefined function’

Statically Typedvs Not ~ ?

• What we GET

if its NOT statically typed

• careless mistakes

• typos

on runtime

You see

NullPointerException

ReferenceError

TypeError

Call to undefined function

Play specifics

•Documented•Translated•Pluggable•Typed

Play specifics

•Documented•Translated•Pluggable•Typed

Productive!

break2/3

WEB+DB vol.71

Play 2.x

• We have Play 1.x, 2.0

• Play 2.1 is coming

Play 1.x

• Written in Java

• Supports Java and Scala

• Since 2009

• Stable

Play 2.0

• Written in Scala

• Supports Scala and Java

• Since 2012

• More scalability

• Typesafe Stack & Typesafe, Inc.

Play 2.1

• Features

• Improvements

• Changes

Play 2.1Features

• Scala 2.10

• Scala’s Promise API

• Better JSON API

• Project templates & Scaffolding

Play 2.1 Improvements

• Run tests in Forked JVM

• Out of memory: PermGen Space

• Faster compile

• thanks to Scala 2.10 & SBT 0.12

Play 2.1Changes

• Anorm to Slick(ScalaQuery)

Play 2.x is

•Active!

Recommendation

• Do you want to:

• write web apps in Java/Scala?

• try modern tech?

> play new

> play new

> play run

[Start]Playing!

@mumoshu

Thank you!