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Play Framework 2.5
Ͱͭ͘Δ Web ΞϓϦέʔγϣϯ
Tsuyoshi Yoshizawa
@ussy00
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No content
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Play + Scala ܦݧྺ
● Java Λத৺ʹडୗҊ݅
● ओʹ Seasar2 ϑϨʔϜϫʔΫ
● Play 2.0 ͔Βຊ֨తʹ Scala Λ৮Δ
● ͍͍ͩͨ 4 ͙Β͍
● αʔϏεΛͭ͘Δͱ͖ʹબఆ
● ຊӡ༻ظؒ 2
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Play + Scala ΛબΜͩཧ༝
● Java 8 ·ͩͳ͘ Scala ʹڵຯ
● ίϨΫγϣϯ API ͕ศརͩͬͨ
● Option ͕ॳΊ͔ΒΈࠐ·Ε͍ͯͨ
● ؆ܿͳίʔυʹͰ͖Δ
● Java ࢿ࢈ʢϥΠϒϥϦʣ͕ར༻Ͱ͖Δ
● ॻ͍ͯΈָ͔ͯͬͨ͠
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Play Framework makes it easy to build web
applications with Java & Scala.
Play is based on a lightweight, stateless,
web-friendly architecture.
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RESTful
GET /users/:id controllers.UserController.find(id: Long)
class UserController extends Controller {
def find(id: Long) = Action { implicit request =>
User.findById(id).map { user =>
Ok(Json.obj(
“id” -> user.id,
“name” -> user.name
))
}.getOrElse {
NotFound(Json.obj(
“message” -> “User not found”
))
}
}
}
routes
UserController.scala
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εςʔτϨε
● ηογϣϯใ ΫϥΠΞϯταΠυ
(Cookie) ʹจࣈྻΛอ࣋
● ΩʔΛݩʹ DB/Ehcache/Redis ͳͲʹ
อଘ͢Δ
● HMAC-SHA1 ʹΑΔॺ໊
● play.crypto.secret ҉߸伴ͷΩʔ
(application.conf)
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ϦόʔεϧʔςΟϯά
GET /users/:id controllers.UserController.find(id: Long)
POST /users/create controllers.UserController.create
class UserController extends Controller {
def create = Action { implicit request =>
// ࡞ॲཧ
val user = ???
Redirect(routes.UserController.find(user.id))
}
}
● ίϯύΠϧνΣοΫʹΑΔ҆৺ײ
● ύϥϝʔλʔɺ URL มߋͷࣗಈਵ
@user.name
view
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ςϯϓϨʔτΤϯδϯ (twirl)
@(customer: Customer, orders: List[Order])
Welcome @customer.name!
-
@for(order <- orders) {
- @order.title }
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HTTP ϦΫΤετϋϯυϦϯά
case class UserData(name: String, age: Int)
val userForm = Form(
mapping(
"name" -> nonEmptyText,
"age" -> number(min = 0, max = 100)
)(UserData.apply)(UserData.unapply)
)
● ύϥϝʔλʔͷܕ߹ΘͤίϯύΠϧνΣοΫ
● content-type ʹΑΔϋϯυϦϯάରԠ
● application/x-www-form-urlencoded
● application/json
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Play ଐϥΠϒϥϦ
● Web ΞϓϦΛ࡞͢Δ্Ͱ࠷ݶͷ
ϥΠϒϥϦ͕ଐ͍ͯ͠Δ
● Play JSON
● Play WS
● HTTP client
● OAuth client
● Play Filters (CSRF, CORS …)
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Dependency Injection
● JSR 330 ඪ४༷ʹ४ڌ
● ίϯετϥΫλΠϯδΣΫγϣϯਪ
● Play 2.4 ͔Βಋೖ
import javax.inject.Inject
import play.api.libs.ws._
class MyComponent @Inject()(wsClient: WSClient) {
def request(url: String) = {
wsClient.url(url).get()
…
}
}
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࣮Γସ͑ྫ
● trait (interface) ʹΑΔ։ൃڥ/ຊ൪
ڥͷ࣮Γସ͑ίʔυͰදݱ
class MyModule(environment: Environment, configuration: Configuration)
extends AbstractModule {
override def configure() = {
configuration.getString("storage.type") match {
case Some(t) if t == "local" =>
bind(classOf[StorageService]).to(classOf[LocalStorageService])
case Some(t) if t == "s3" =>
bind(classOf[StorageService]).to(classOf[S3StorageService])
case t =>
sys.error(s"The storage type is not supported: $t")
}
}
}
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ࠃࡍԽରԠ (i18n)
● ϝοηʔδϦιʔε conf/messages
ϑΝΠϧʹ key=value ܗࣜͰهड़
● ϩέʔϧΛ֦ுࢠʹՃͯ͠ෳݴޠ
ରԠ
● conf/messages.ja-JP
● conf/messages.fr
play.i18n.langs=[“en-US”,"ja-JP", “fr”]
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ࠃࡍԽରԠྫ
import javax.inject.Inject
import play.api.i18n.I18nSupport
class UserController @Inject()(val messagesApi: MessagesApi)
extends Controller with I18nSupport {
def hello = Action { implicit request =>
Ok(Json.obj(
“text” -> Messages(“hello”)
))
}
}
hello=Hello Scala!
hello=͜Μʹͪ Scala!
messages.ja-JP
messages
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ࠃࡍԽରԠϫϯϙΠϯτ
● ݴޠͷద༻ΫϥΠΞϯτใ͔Β
1. Cookie (PLAY_LANG)
2. AcceptLanguage (HTTP Header)
● MessagesApi#setLang Ͱ Cookie ʹө
Lang(Locale.JAPAN)
Lang.get(“ja-JP”).getOrElse(Lang.defaultLang)
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͕͍͍͜͜Α
Play Framework
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Hot reloading
● ίϯςφ࠶ىಈͳ͠ʹίʔυө
● sbt ʹΑΔࠩίϯύΠϧ
● Ϋϥεϩʔμʔࠩ͠ସ͑
● ։ൃϞʔυͰσϑΥϧτͰ༗ޮ
● dev/prod/test Ϟʔυ
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Evolutions
● SQL ͰϑΝΠϧʹΞοϓάϨʔυ/μ
ϯάϨʔυΛهड़
● Scala ͰϩδοΫهड़Ͱ͖ͳ͍
● HTTP ϦΫΤετ࣌ʹݕ
● ։ൃऀͷ DB Λࣗಈతʹ౷ҰͰ͖Δ
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ϚΠάϨʔγϣϯ࣮ߦྫ
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ϚΠάϨʔγϣϯϒϥϯνઓུ
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ϚΠάϨʔγϣϯϝϦοτ
● ϑΟʔνϟʔϒϥϯν։ൃͱ૬ੑ͕Α͍
● ϒϥϯνؒͷҠಈ͕͍͢͠
● try&error ͕͍͢͠
● ϑΝΠϧ໊࿈൪Ͱཧ (n.sql)
● Ϛʔδ͢Δͱ͖ʹίϯϑϦΫτΛى͜
ͤ͞ɺϚΠάϨʔγϣϯॱΛݻఆ
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ϚΠάϨʔγϣϯຊ൪ڥྫ
● ຊ൪ڥͰແޮʹ͍ͯ͠Δ
● खಈͰΦϯϥΠϯεΩʔϚมߋରԠ͢
ΔͨΊׂ࣮ͯ͠ߦ͢Δέʔε͋Γ
● σʔλ݅ɺϩοΫͷҧ͍ʹҙ
play.evolutions.enabled=false
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ଞͷϚΠάϨʔγϣϯπʔϧ
● Play Evolutions ͕ഽʹ߹Θͳ͍
● ίϚϯυϥΠϯ͔Βద༻͍ͨ͠
● Java(Scala) ͰϚΠάϨʔγϣϯ͍ͨ͠
● Flyway ͕͓͢͢Ί
● https://github.com/flyway/flyway-
play
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Typesafe config
db {
default {
driver = org.postgresql.Driver
}
}
● Java ϥΠϒϥϦ Scala ϥούʔ
● HOCON ܗࣜ (JSON Superset)
● ઃఆϑΝΠϧΛ include Ͱ͖Δʢ্ॻ͖ʣ
● application.conf -> prod.conf -> beta.conf
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͕͍͍͜͜Α Play ·ͱΊ
● RESTful ϑϨʔϜϫʔΫ
● εέʔϧΞτ͍͢͠
● աͳ·Ͱͷܕ҆શ
● Ξϊςʔγϣϯ΄΅ͳ͘ॻ͍ͯ͋Δ
ͱ͓Γʹಈ҆͘৺ײ
● ࢼ͠ͳ͕Β։ൃΛਐΊ͍͚ͯΔ
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͕͜͜ϋϚΔΑ
Play Framework
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Scala ඇಉظॲཧ
import scala.concurrent.ExecutionContext.Implicits.global
Future {
// Some blocking or expensive code here
}
● Future Λ͏͜ͱͰɺॲཧΛඇಉظԽ
͢Δ͜ͱ͕Ͱ͖Δ
● CPU ίΞಉ࣌ʹॲཧ
● Java8 CompletableFuture తͳͷ
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Play Scala ඇಉظॲཧ
import play.api.libs.concurrent.Execution.Implicits._
● Future Λ͏
● import ઌΛมߋ͢Δ͜ͱ
● Play σϑΥϧτ 24 ݸ·ͰͷϦΫΤε
τΛฒྻͰड͚औΔ
● Thread Pool ͕ރׇ͢Δͱ৽نϦΫΤε
τ͕ͪঢ়ଶʹͳΔ
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σϑΥϧτεϨουϓʔϧௐ
akka {
actor {
default-dispatcher = {
fork-join-executor {
parallelism-min = 100
parallelism-max = 100
}
}
}
}
● ϦϦʔεલʹඞͣνϡʔχϯά
● DB ࠷େଓΛ֬ೝ
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Netty Play
Request
Default
thread pool
Other
thread pool
Play
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ผεϨουϓʔϧ࡞
contexts {
http {
fork-join-executor {
parallelism-factor = 20.0
parallelism-max = 200
}
}
}
val executionContext =
akkaSystem.dispatchers.lookup(“contexts.http”)
Future {
// Some blocking or expensive code here
}(executionContext)
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● దʹεϨουϓʔϧΛఆٛ͠ύϑΥʔ
Ϛϯενϡʔχϯά
● DB ࠷େଓ֬ೝ
● εϨουΛա৴͗ͣ͢͠ SQS ͳͲͷ
ϝοηʔδΩϡʔߟྀ
Play εϨουϓʔϧ·ͱΊ
https://www.playframework.com/documentation/
2.5.x/ThreadPools
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ORM
● Slick
● Lightbender ࣾʹΑΔ ORM
● Slick 3.0 ͔ΒඇಉظΞΫηεΛਪ
● ScalikeJDBC
● ૉʹ͔͚ͯେ͖ͳϋϚϦͳ͠
● جຊతʹ SQL Ͱهड़͢Δ։ൃʹ
● νϡʔχϯά͍͔ͨ͠Β
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ϦόʔεϓϩΩγ
play {
http {
forwarded.trustedProxies=[“10.0.0.0/8”, "::1",
“127.0.0.1"]
}
}
● Nginx ͳͲϦόʔεϓϩΩγΛஔ͍ͯ IP
ΞυϨεΛऔಘ͍ͨ͠
● ৴པ͢Δ Private ωοτϫʔΫΛࢦఆ
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Assets ύϑΥʔϚϯε
● ϦΫΤετ͝ͱʹεϨουফඅ
● ϦϦʔεϏϧυ࣌ʹ S3 (cloudfront) ʹ
Ξοϓϩʔυ͢ΔεΫϦϓτࣗ࡞
● CDN Λར༻͠ϦΫΤετΛࡹ͔ͳ͍
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Play ใपΓ
● Stackoverflow ͕ୈೋͷυΩϡϝϯτ
● ຊޠपΓ
● Blog ݹ͘ͳΓ͕ͪ
● ༗ࢤͷํʑʹΑΔຊՈ༁
● https://gitter.im/scalajp/public
● @scalajp_gitter (twitter)
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͕͜͜ବͩΑ
Play Framework
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ίϯύΠϧ
● Scala ͓ଋ
● View/Routing ͕ଟ͘ͳΔͱίϯύΠ
ϧ͕͘ͳͬͯ͘Δ
● αϒϓϩδΣΫτߟྀ͢Δ
● API αʔόʔͱͯ͠ͷར༻ݕ౼
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ίϯύΠϧྫ
0 50 100
67s
90s
MBA 11-inch Mid 2012 (2.0 GHz intel Core i7)
MBP Retina 15-inch Early 2013 (2.7 GHz Intel Core i7)
։ൃ࣌ຖճΫϦʔϯίϯ
ύΠϧ͢ΔΘ͚Ͱͳ͘ɺ
sbt ͕ࠩίϯύΠϧͯ͘͠
ΕΔ
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ίϯύΠϧվળ
sources in (Compile, doc) := Nil,
publishArtifact in (Compile, packageDoc) := false
build.sbt
● υΩϡϝϯτϑΝΠϧੜ͠ͳ͍
● ϑΝΠϧमਖ਼ޙʹࣗಈίϯύΠϧ
$ sbt ~run # activator ~run
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ޓੑ
● Play όʔδϣϯޓੑ
● ։ൃ͕͍ʢϝϦοτͰ͋Δʣ
● Ҡߦظؒ͘ΕΔ͕ഁյత
● Scala όʔδϣϯޓੑ
● ϚΠφʔόʔδϣϯ͝ͱʹόΠφϦޓ
ੑ͕ͳ͍
● ϥΠϒϥϦʹ PR ૹͬͨΓ fork ͨ͠Γ
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sbt-web
● grunt/gulp ͷΑ͏ͳϏϧυγεςϜ
● ΤίγεςϜʹΔͨΊར༻͍ͯ͠ͳ
͍
● JS ք۾ͷར༻ਓ/ϥΠϒϥϦͷࠩ
● όʔδϣϯΞοϓ
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Build front-end with sbt
● ։ൃ࣌ sbt ʹλεΫΛՃͯࣗ͠ಈ
Ͱ gulp (npm) Λ࣮ߦ
● https://www.playframework.com/
documentation/2.5.x/SBTCookbook
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ϑϩϯτΤϯυ
● JavaScript/CSS मਖ਼ύοέʔδϯά
● Scala ίϯύΠϧ
● ΤϯυϢʔβʔࠓࠔͬͯΔ
● ࠩ͠͠Λ؆୯ʹͰ͖ΔΑ͏ʹ͢Δ
● API αʔόʔͱͯ͠ͷར༻ݕ౼
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͕͜͜ବͩΑ Play ·ͱΊ
● ϓϩδΣΫτ͕େ͖͘ͳΔͱίϯύΠϧ
࣌ؒ૿Ճ
● ഁյతͳΞοϓάϨʔυ
● อकతͳϓϩδΣΫτͰޙʑͭΒ͘
ͳΔ
● Play ʹґଘ͗͢͠ͳ͍
● γεςϜʹݟ߹ͬͨߏΛߟ͑Δ
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Play Framework ·ͱΊ
● Lightbend ࣾʹΑΔ Scala Web
Framework ͷσϑΝΫτ
● τϨϯυΛऔΓೖΕͯ։ൃ͕׆ൃ
● গͳ͘ͱ ̐ ܧଓ͓ͯ͠Γɺ
2.6/3.0 ʹ͚ͯ։ൃத
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Play Framework ·ͱΊ
● ܕʹकΒΕͳ͕Βָ͘͠ Web ։ൃ
● খ͍͞ϓϩδΣΫτɺࣾπʔϧͰ࢝
ΊΔ͕Φεεϝ
● Scala ͷػೳΛ͍֮͑ͯ͘ػձʹ
● API αʔόʔͱͯͬͯ͠ΈΔ