![Actions
def r: Result = Action { Ok("Hello World!") }
Action { Ok("Hello World!").withHeaders(
CACHE_CONTROL -> "max-age=3600", ETAG -> "xx" )}
Action.Async {
future.map(i => Ok("Hello World!" + i))}
Action (parse.json) { implicit request: =>
Ok("Request: " + request)
}
WebSocket.using[String] { request: =>
val in = Iteratee.foreach[String]
val out = Enumerator("Hello!")
(in, out)
}](https://image.slidesharecdn.com/scalaforplay-131015082759-phpapp02/85/Scala-for-play-34-320.jpg)
![Request
def i = Action { implicit req =>
Ok("Request: [" + req + "]")
}](https://image.slidesharecdn.com/scalaforplay-131015082759-phpapp02/85/Scala-for-play-35-320.jpg)
![Request
def i = Action { implicit req: [
Ok("Request: [" + req + "]")
}
] =>](https://image.slidesharecdn.com/scalaforplay-131015082759-phpapp02/85/Scala-for-play-36-320.jpg)
![Request
def i = Action { implicit req: AnyContent =>
Ok("Request: [" + req + "]")
}](https://image.slidesharecdn.com/scalaforplay-131015082759-phpapp02/85/Scala-for-play-37-320.jpg)
![Request
def j = Action(parse.json) { implicit req =>
Ok("Request: [" + req + "]")
}](https://image.slidesharecdn.com/scalaforplay-131015082759-phpapp02/85/Scala-for-play-38-320.jpg)
![Request
def j = Action(parse.json) { implicit req: [
Ok("Request: [" + req + "]")
}
] =>](https://image.slidesharecdn.com/scalaforplay-131015082759-phpapp02/85/Scala-for-play-39-320.jpg)
![Request
def j = Action(parse.json) { implicit req: JsValue =>
Ok("Request: [" + req + "]")
}](https://image.slidesharecdn.com/scalaforplay-131015082759-phpapp02/85/Scala-for-play-40-320.jpg)
![Scala for Play
플레이를 공부하면서 가장 많이 나온 주제를 정
리했습니다 .
Template
implicit keyword
Form
Option[T] type](https://image.slidesharecdn.com/scalaforplay-131015082759-phpapp02/85/Scala-for-play-41-320.jpg)
![Template
@(title: String, articles: List[article])
@import helper._
<table>
@main(title){
@articles.map{ article =>
<li> @article.title </li>}}
</table>](https://image.slidesharecdn.com/scalaforplay-131015082759-phpapp02/85/Scala-for-play-45-320.jpg)
![Implicit
val db: DB = application.getDatabase()
def query(str: String)(db: DB): List[User]
val users = query("""SELECT * FROM USER""")(db)
val posts = query("""SELECT * FROM POST WHERE ...""")(db)
val pets = getPost("""SELECT * FROM PET""")(db)](https://image.slidesharecdn.com/scalaforplay-131015082759-phpapp02/85/Scala-for-play-48-320.jpg)
![Implicit
val db: DB = application.getDatabase()
def query(str: String)(db: DB): List[User]
val users = query("""SELECT * FROM USER""")(db)
val posts = query("""SELECT * FROM POST WHERE ...""")(db)
val pets = getPost("""SELECT * FROM PET""")(db)](https://image.slidesharecdn.com/scalaforplay-131015082759-phpapp02/85/Scala-for-play-49-320.jpg)
![Implicit
implicit val db: DB = application.getDatabase()
def query(str: String)(implicit db: DB): List[User]
val users = query("""SELECT * FROM USER""")(db)
val posts = query("""SELECT * FROM POST WHERE ...""")(db)
val pets = getPost("""SELECT * FROM PET""")(db)](https://image.slidesharecdn.com/scalaforplay-131015082759-phpapp02/85/Scala-for-play-50-320.jpg)
![Implicit
implicit val db: DB = application.getDatabase()
def query(str: String)(implicit db: DB): List[User]
val users = query("""SELECT * FROM USER""")
val posts = query("""SELECT * FROM POST WHERE ...""")
val pets = getPost("""SELECT * FROM PET""")](https://image.slidesharecdn.com/scalaforplay-131015082759-phpapp02/85/Scala-for-play-51-320.jpg)
![Implicit
import play.api.Play.current
def getAll: List[Product] = DB.withConnection {
implicit connection =>
sql().map ( row =>
Product(row[Long]("id"), row[String]("name")
).toList}](https://image.slidesharecdn.com/scalaforplay-131015082759-phpapp02/85/Scala-for-play-52-320.jpg)
![Implicit
import play.api.Play.current
def getAll: List[Product] = DB.withConnection {
implicit connection =>
sql().map ( row =>
Product(row[Long]("id"), row[String]("name")
).toList}
Play.api.Play.scala
implicit def current: Application = maybeApplication...](https://image.slidesharecdn.com/scalaforplay-131015082759-phpapp02/85/Scala-for-play-53-320.jpg)
: Option[A] = if (x == null) None else Some(x)
// mothods
flatMap, Flatten, map, foreach, idDefined, isEmpty...](https://image.slidesharecdn.com/scalaforplay-131015082759-phpapp02/85/Scala-for-play-54-320.jpg)
Scala for play
- 2. Play 는 모르셔도 되지만 , 스칼라는 조금 아셔야 합니다 .
- 4. 프레임워크를 찾아서 ... ● 모바일 테스트 서버가 필요해 ... ● 웹 프론트 개발을 위한 베이스 ... ● 무엇보다 만들고 싶은게 많았음 ...
- 5. 프레임워크 선택 기준 ... ● ● Quick and Dirty 확장 가능성 ● Testablity & TDD able ● 뚜렷한 지향점 ● JAVA ● ● JVM 투명성
- 6. 웹 프레임워크 ...
- 7. History - Play 1.x
- 8. History - Play 1.x
- 9. History - Play 1.x SBT Akka Template
- 10. History - Play 2
- 11. 고민 스칼라를 배워야 하나 ?
- 12. 결정 ! 목숨걸고 한 3 개월 하면 되겠지 ?
- 13. 잃어버린 2013
- 14. Play framework Simple Great Testing Support URL Routing JPA/Ebean Support (Java only) Class Reloading NIO Server(Netty) Share-Nothing Asset Compiler Java & Scala Support i18n Compile time checking Instant deply on Heroku, Cloud bees
- 15. Simple
- 16. Servlet Play
- 17. Simple > All in One
- 18. Simple > Code Restful Routes GET /index controllers.App.index Straitforward Controllers Action { Request → Response } Easy Template <h1> @name </h1>
- 19. Simple > Web Spec HTTP/1.1(rfc2616) HTML5 / CSS
- 20. Simple > Http Result Result.scala def SeeOther(url: String): SimpleResult = Redirect(url, 303) val BadRequest = new Status(400) val NotFound = new Status(404) val InternalServerError = new Status(500) val NoContent = SimpleResult( header = ResponseHeader(204), body = Enumerator.empty, connection = HttpConnection.KeepAlive) } 응답코드에 따른 행동은 플레이가 알아서 ~
- 21. Simple > Test Integration Test browser.goTo("http://localhost:" + port) browser.pageSource must contain("Hello") Unit Test val home = route(FakeRequest(GET, "/")).get status(home) must equalTo(OK) contentType(home) must beSome.which("text/html") contentAsString(home) must contain ("Hello")
- 22. Simple > Deploy on Heroku Procfile 개발 / 배포 설정도 플레이가 알아서 ! web: target/start -Dhttp.port=${PORT} -DapplyEvolutions.default=true -Ddb.default.url=${DATABASE_URL} -Ddb.default.driver=org.postgresql.Driver Deploy! $ git push heroku master
- 23. Simple > Deploy on CloudBees
- 24. Simple > I18n conf/messages error.notfound = Post not found error.required = Mandatory field is empty user.confirmPassword = Confirm Password validation.duplicated = Already exists! validation.required = Required! conf/messages.ko error.notfound = 페이지를 찾을 수 없습니다 . error.required = 필수로 입력 되어야 합니다 . user.confirmPassword = 패스워드를 확인해주세요 . validation.duplicated = 이미 존재합니다 ! validation.required = 필수입니다 .
- 25. Simple > Too Simple 하위 호환성은 기대하지 않는게 좋습니다 .
- 26. Case Study
- 27. Play inside
- 28. Project 1 프로젝트 생성 $ play new myApp 2 콘솔 진입 $ play 3 실행 > run IDE 프로젝트 생성시 소스를 포함하여 빌드 > Idea with-source = true > eclipse with-source=true
- 29. Structure app └ assets └ controllers └ models └ views conf └ application.conf └ routes public project test LESS CSS, CoffeeScript Application controllers Application business layer Templates Configurations files Main configuration file Routes definition Image, CSS, JavaScript Build, Plugins Setting Unit and Integration Test
- 30. Play framework Routes Routes ... ... ... ... request request Client dispatch Controller 1 2 Controller Controller 1 2 Controller response response View View Model
- 31. Routes Http method Uri Body (scala code) GET / controllers.App.index GET /add controllers.App.blank POST /article controllers.App.insert GET /article/$num<d{9}> controllers.App.details(num: Long) POST /article/:id controllers.App.update(id: Long) POST /article/:id/delete controllers.App.delete(id: Long) GET /assets/*file controllers.Assets.at(path="/public", file)
- 32. Routes Http method Uri Body (scala code) GET / controllers.App.index GET /add controllers.App.blank POST /article controllers.App.insert GET /article/$num<d{9}> controllers.App.details(num: Long) POST /article/:id controllers.App.update(id: Long) POST /article/:id/delete controllers.App.delete(id: Long) GET /assets/*file controllers.Assets.at(path="/public", file)
- 33. Controller POST /article/:id controllers.App.detail(id: Long) object App extends Controller { def detail(num: Long) = Action{ OK(Item.find(num)...) } def join = WebSocket{ ... } }
- 34. Actions def r: Result = Action { Ok("Hello World!") } Action { Ok("Hello World!").withHeaders( CACHE_CONTROL -> "max-age=3600", ETAG -> "xx" )} Action.Async { future.map(i => Ok("Hello World!" + i))} Action (parse.json) { implicit request: => Ok("Request: " + request) } WebSocket.using[String] { request: => val in = Iteratee.foreach[String] val out = Enumerator("Hello!") (in, out) }
- 35. Request def i = Action { implicit req => Ok("Request: [" + req + "]") }
- 36. Request def i = Action { implicit req: [ Ok("Request: [" + req + "]") } ] =>
- 37. Request def i = Action { implicit req: AnyContent => Ok("Request: [" + req + "]") }
- 38. Request def j = Action(parse.json) { implicit req => Ok("Request: [" + req + "]") }
- 39. Request def j = Action(parse.json) { implicit req: [ Ok("Request: [" + req + "]") } ] =>
- 40. Request def j = Action(parse.json) { implicit req: JsValue => Ok("Request: [" + req + "]") }
- 41. Scala for Play 플레이를 공부하면서 가장 많이 나온 주제를 정 리했습니다 . Template implicit keyword Form Option[T] type
- 43. Template 어느날 제자가 스승에게 물었다 . 스승님 바람에 나뭇가지가 흔들리는 것은 나뭇가지가 흔들리는 것입니까 바람이 흔들리는 것 입니까 ? 그러자 스승이 답했다 . 흔들리는 것은 나뭇가지도 아니고 바람도 아니다 . 바로 너의 마음이다 .
- 44. Template Header.scala.html @(title: String) <h1>@title</h1> convert Header.template.scala def apply(title: String) = { format.raw( "<h1>" + title + "</h1>" ) }
- 45. Template @(title: String, articles: List[article]) @import helper._ <table> @main(title){ @articles.map{ article => <li> @article.title </li>}} </table>
- 46. Template composition Header main (header) (side)(content) side Content
- 48. Implicit val db: DB = application.getDatabase() def query(str: String)(db: DB): List[User] val users = query("""SELECT * FROM USER""")(db) val posts = query("""SELECT * FROM POST WHERE ...""")(db) val pets = getPost("""SELECT * FROM PET""")(db)
- 49. Implicit val db: DB = application.getDatabase() def query(str: String)(db: DB): List[User] val users = query("""SELECT * FROM USER""")(db) val posts = query("""SELECT * FROM POST WHERE ...""")(db) val pets = getPost("""SELECT * FROM PET""")(db)
- 50. Implicit implicit val db: DB = application.getDatabase() def query(str: String)(implicit db: DB): List[User] val users = query("""SELECT * FROM USER""")(db) val posts = query("""SELECT * FROM POST WHERE ...""")(db) val pets = getPost("""SELECT * FROM PET""")(db)
- 51. Implicit implicit val db: DB = application.getDatabase() def query(str: String)(implicit db: DB): List[User] val users = query("""SELECT * FROM USER""") val posts = query("""SELECT * FROM POST WHERE ...""") val pets = getPost("""SELECT * FROM PET""")
- 52. Implicit import play.api.Play.current def getAll: List[Product] = DB.withConnection { implicit connection => sql().map ( row => Product(row[Long]("id"), row[String]("name") ).toList}
- 53. Implicit import play.api.Play.current def getAll: List[Product] = DB.withConnection { implicit connection => sql().map ( row => Product(row[Long]("id"), row[String]("name") ).toList} Play.api.Play.scala implicit def current: Application = maybeApplication...
- 54. Option Type List 와 함께 가장 중요한 타입입니다 . 처음부터 잘 살펴 보세요 >_< 스칼라 코드에서 여러분이 null 을 보실 일은 거의 없습니다 . 가능한 null 체크를 사용하지 않도록 노력 해보세요 ~ (null object pattern) Scala.Option.scala def apply[A](x: A): Option[A] = if (x == null) None else Some(x) // mothods flatMap, Flatten, map, foreach, idDefined, isEmpty...
- 55. Form (hide nothing) 1 Client GET /signup 2 Signup.html 3 Validate Fail su /index 5 Redirect cc es s 4 Create
- 56. 마무리 Pros & Cons ( 순전히 개인적인 )
- 57. Pros 단점 빼고 다 좋습니다 !
- 58. Pros 단점 빼고 다 좋습니다 ! 라고 하면 ...
- 59. Pros ● Simple ● Type Safe everywhere ● Java ↔ Scala
- 61. 2.3 Roadmap ● ● ● ● ● 브라우저 내에서의 개발환경 구성 WebJar - Jquery, require.js, ecc JSUnit test Bootstrap 탬플릿 향상 JSON API → Form 매핑 Java ● JDK8 Compat Library ● Java 8 – template
- 62. 질문 여러분은 무엇을 만들고 싶으세요 ?
- 63. 이렇게 시작해서 ...
- 64. 이렇게 시작해서 ...
- 65. 언젠가는 ... 발표에 사용된 예제 코드 : https://github.com/organizations/ScalaPlayers
- 66. 감사합니다 ! 라 스칼라 코딩단 GoogleGroups/ScalaKorea https://groups.google.com/forum/#!forum/scala-korea 발표에 사용된 샘플 코드 (2013-11-01 이후 업로드 ) github.com/ScalaPlayers/SpringCampWithScala2013 최정열 SNS: facebook.com/choijeongyeol Email: myeesan@gmail.com
- 67. Scala "Scala is deep where other languages are broad."