「PlayFramework関西ビギナーズ in OsakanSpace 第1回」 http://atnd.org/events/33666 Play frameworkの概要と今後についてゆるく説明して、 Playとそのコミュニティを雰囲気を知っていただこうという趣旨で発表しました。 参加された方の半数がPHPユーザだったので、冒頭でPHPユーザの方向けの説明を特別に入れたりして工夫しています。

1. > play new

2. Do you know
Web Application
Framework?

3. Do you know
Play!> framework?

4. Do you know
Scala?
’’’

5. [Start]
Playing!
@mumoshu

6. # of atnders
php
java
scala
js
python
perl
0 5 10 15

7. PHP vs Play
PHP Symfony
Symfony
naked?
Slim CakePHP
CakePHP
<- thin rich ->
Play!>

8. Play is
• A web application framework
• Ease common tasks in web dev

9. Play basics
•Easy start
•Simple development
•Scala

10. Play basics
•Easy start
•Simple development
•Scala

11. How to start
•Download
•Unzip
•play new

12. Play basics
•Easy start
•Simple development
•Scala

13. How you develop
•play run
•Repeat:
•Write code!
•F5!

14. Play basics
•Easy start
•Simple development
•Scala

15. Scala
’’’
• Run on JVM
• A lot of Java libraries
• Hybrid language
• Imperative programming
• Object oriented programming
• Functional programming

16. Whats happy with FP
• Concurrency
• Scalability

17. Imperative vs
Functional
• Imperative Programming
do A -> state++,
do B -> state++, ...
• Functional programming
in1 -> f(x) -> out1
in2 -> g(x) -> out2

18. + concurrency

19. Easy concurrency
• Imperative programming
do A -> state <- do B
> sudden conflict!!! <
• Functional programming
in1 -> f(x) -> out1, in2 -> g(x) -> out2
> no conflict!!! <

20. Easy scalability
• Single Play
req -> acion1(x) -> result
req -> acion2(x) -> result
...
• Multiple Play’s
req -> play1 -> result
req -> play2 -> result
...

21. Play basics
•Easy start
•Simple development
•Scala

22. Play basics
•Easy start
•SimpleHopeful!
development
•Scala

23. break
1/3
ビースト★ハーレム
∼野獣の甘噛み∼
http://pf.gree.jp/56616

24. Play specifics
• Documented
• Translated
• Pluggable
• Statically Typed

25. Documented
• 0ver 100 pages
• http://playframework.org/

26. Play specifics
• Documented
• Translated
• Pluggable
• Statically Typed

27. Translated
• Over 100 pages
• http://playdocja.appspot.com/

28. Play specifics
• Documented
• Translated
• Pluggable
• Statically Typed

29. Pluggable
• 27 plugins
• http://www.playframework.org/
documentation/2.0.4/Modules

30. Plugins
• LESS • Redis
• SASS • MongoDB
• CoffeeScript • etc.
• TypeScript <- Me
modern web dev with
a lot of plugins
• Velocity <- FuRyu
• Memcached <- Me

31. Play specifics
• Documented
• Translated
• Pluggable
• Statically Typed

32. Statically Typed
• Can be freed from
• null/NULL
• Free from
• ReferenceError
• TypeError
• ‘Call to undefined function’

33. Statically Typed
vs Not ~ ?
• What we GET
if its NOT statically typed

34. You see
• careless mistakes
• typos
on runtime

35. NullPointerException

36. ReferenceError

37. TypeError

38. Call to undefined
function

39. Play specifics
• Documented
• Translated
• Pluggable
• Typed

40. Play specifics
• Documented
• Translated
Productive!
• Pluggable
• Typed

41. break
2/3
WEB+DB vol.71

42. Play 2.x
• We have Play 1.x, 2.0
• Play 2.1 is coming

43. Play 1.x
• Written in Java
• Supports Java and Scala
• Since 2009
• Stable

44. Play 2.0
• Written in Scala
• Supports Scala and Java
• Since 2012
• More scalability
• Typesafe Stack & Typesafe, Inc.

45. Play 2.1
• Features
• Improvements
• Changes

46. Play 2.1
Features
• Scala 2.10
• Scala’s Promise API
• Better JSON API
• Project templates & Scaffolding

47. Play 2.1
Improvements
• Run tests in Forked JVM
• Out of memory: PermGen Space
• Faster compile
• thanks to Scala 2.10 & SBT 0.12

48. Play 2.1
Changes
• Anorm to Slick(ScalaQuery)

49. Play 2.x is
•Active!

50. Recommendation
• Do you want to:
• write web apps in Java/Scala?
• try modern tech?

51. > play new

52. > play new

53. > play run

54. [Start]
Playing!
@mumoshu

55. Thank you!