Micronaut で始める Server Side Kotlin

JJUG CCC Dall 2019 での登壇資料です。

1. Micronaut Ͱ࢝ΊΔ Server Side Kotlin @bulbulpaul #jjug_ccc #ccc_i4 2019/11/23 JJUG CCC Fall 2019
2. #jjug #ccc_i4 Yahoo!カレンダー
 Server Side Engineer @bulbulpaul Fav. Python, Kotlin Kansai.kt Organizer ポール
4. using
5. #jjug #ccc_i4 Agenda [࿩͢͜ͱ] • Server Side Kotlin ͷ࠷ۙͷಈ޲ • ͳͥKotlin, Micronaut ͳͷ͔ • Kotlin, Micronaut Λ࢖ͬͯΞϓϦέʔγϣϯΛ࡞Δ [࿩͞ͳ͍͜ͱ] • Kotlinͷࡉ͔ͳݴޠ࢓༷
6. #jjug #ccc_i4 Disclaimer 2019/11/23 ࣌఺Ͱͷ࠷৽൛͕ϕʔεͰ͢ɻ • Kotlin : 1.3.60 • micronaut : 1.2.5
7. Kotlin
8. Έͳ͞Μʹ࣭໰Ͱ͢
9. Kotlin࢖ͬͯ·͔͢ʁ
10. #jjug #ccc_i4 ੩తܕ෇͚ͷΦϒδΣΫτࢦ޲ϓϩάϥϛϯάݴޠ Kotlin͸OSS, Kotlin Foundation (JetBrains, Googleʣ͕؅ཧ ࣮ߦ؀ڥ͸ҎԼͷ4ͭ • JVM • Android • Native(iOS, MacOS, Android, Windows, Linux, WebAssembly) • JavaScript ࢀߟ: Kotlin Foundation https://kotlinlang.org/foundation/kotlin-foundation.html
11. #jjug #ccc_i4 Kotlin Β͠͞ͱ͸ Kotlin͸࣮༻ੑΛॏཁࢹ͍ͯ͠ΔݴޠͰ͢ɻ • ؆ܿ͞ < Մಡੑ • දݱͷ๛͔͞ < ࠶ར༻ੑ • ಠࣗੑ < ૬ޓӡ༻ੑ • ݈શੑ < ҆શੑ Ҿ༻ݩ: Kotlin Conf 2018 Keynote P21
12. αʔόʔαΠυؔ࿈͸
 Ͳ͏͍ͬͨঢ়گͳͷ͔
13. #jjug #ccc_i4 Serverside Frameworks and more…
14. #jjug #ccc_i4 Server Side Frameworks جຊతʹJavaͷFramework͸ͦͷ··࢖͑·͢ɻ େ͖ͳҧ͍ͱͯ͠͸”KotlinΒ͍͠”ίʔυ͕
 ॻ͚Δ͔Ͳ͏͔ɻe.g. NullSafe, DSL౳ Kotlin࠾༻ࣄྫͱͯ͠͸ެࣜʹαϙʔτΛ͍ͯ͠Δ
 SpringɺJetBrains੡ͷKtor͕ଟ͍ɻ
 ࠓճͷMicronaut ΋ެࣜʹKotlinαϙʔτʂ
15. #jjug #ccc_i4 Test Frameworks ͪ͜Β΋جຊతʹJUnit౳͕ͦͷ··࢖͑·͢ɻ Pure KotlinͳςετϥΠϒϥϦͩͱҎԼ͕༗໊ॴ • KotlinTest • Spek kotlintest: https://github.com/kotlintest/kotlintest Spek: https://www.spekframework.org/
16. #jjug #ccc_i4 ORM ͪ͜Β΋جຊతʹJavaͷ౳͕ͦͷ··࢖͑·͢ɻ Pure KotlinͳORM͸Exposed, etc.. JavaͷϥΠϒϥϦͰKotlin αϙʔτ͍ͯ͠Δ෺ͩͱ • Doma • JOOQ • etc…
17. #jjug #ccc_i4 Other tools ։ൃΛ͢Δ্Ͱඞཁͳπʔϧྨ͸Ұ௨Γἧ͍ͬͯ·͢ɻ
 Pure KotlinͰ͸ͳ͍ϥΠϒϥϦ΋গ͠Ͱ͸͋Δ͕Kotlinαϙʔτ͕ ૿͖͑ͯͯ͸͍Δɻe.g. Doma, Jooby, VERT.X Kotlin੡ͷϥΠϒϥϦ͸ҎԼΛࢀর͢Δͱྑ͍Ͱ͢ɻ Awsome Kotlin
 https://github.com/KotlinBy/awesome-kotlin Kotlinؔ࿈ͷϥΠϒϥϦ΍ٕज़৘ใͷLinkू
 https://kotlin.link/
18. ͳͥࠓճ͸
 Micronaut ͷ࿩ʁ
19. #jjug #ccc_i4 ࠷ۙͷτϨϯυ • ϞϊϦε͔ΒϚΠΫϩαʔϏε • ίϯςφԽ΍Ϋϥ΢υωΠςΟϒԽ • k8s, FaaS, PaaS, etc.. • ͦΕʹΑΔӡ༻΍։ൃʹ
 ඞཁʹͳͬͯ͘Δٕज़΋มΘΔ
20. #jjug #ccc_i4 Kotlin x SpringͰͷྫ • SpringBoot x Kotlin • ؆୯ʹॻ͚ͯศརʂ • ެࣜʹKotlin Support΋͍ͯ͠Δ҆͠શʹॻ͖΍͍͢ • ҰํͰFWͷಛੑ্ͷ՝୊ͱͯ͠ • ىಈ͕஗͍ʢىಈ࣌ͷScan΍DI, AOPͷղܾʣ • ϝϞϦͷϑοτϓϦϯτ͕େ͖͘ͳΓ͕ͪ
21. #jjug #ccc_i4 Kotlin x SpringͰͷྫ • SpringBoot x Kotlin • ؆୯ʹॻ͚ͯศརʂ • ެࣜʹKotlin Support΋͍ͯ͠Δ҆͠શʹॻ͖΍͍͢ • ҰํͰFWͷಛੑ্ͷ՝୊ͱͯ͠ • ىಈ͕஗͍ʢىಈ࣌ͷScan΍DI, AOPͷղܾʣ • ϝϞϦͷϑοτϓϦϯτ͕େ͖͘ͳΓ͕ͪ
22. #jjug #ccc_i4 Kotlin x SpringͰͷྫ • ىಈ͕஗͍ • Φʔτεέʔϧ࣌౳ʹ΋ىಈ͕஗͍ͷ͸ࠔΔ • ͱ͸͍͑DI, AOP΋ศར͔ͩΒ࢖͍͍ͨ • ศར͚ͩͲখ͞ͳػೳ࣌ʹFaaS౳΁Ҡ؅ͣ͠Β͍ • ϝϞϦͷϑοτϓϦϯτ͕େ͖͘ͳΓ͕ͪ • ݸʑʹׂΓ౰ͯΔϦιʔε͕େ͖͘ͳΔ
23. ͋Δఔ౓ىಈ΋ૣͯ͘ DI, AOP౳΋࢖͑ͯ KotlinͰ࣮༻ϨϕϧͷFW?
24. Micronaut
25. #jjug #ccc_i4 Ҿ༻: https://micronaut.io/
26. #jjug #ccc_i4 Micronaut JVMϕʔεͷϑϧελοΫͳFrameworkʢҎԼ, FWʣ OSS, ϥΠηϯε͸(Apache License 2.0) ։ൃݩ͸Object Computing(OCI) OCIͷGrails։ൃνʔϜ͕։ൃͨ͠৽͍͠FW ϚΠΫϩαʔϏεͳΞϓϦέʔγϣϯΛૣ͘
 ༰қʹ։ൃ͠΍͘͢͢ΔFW
27. #jjug #ccc_i4 Micronaut ͷಛ௃ • ίϯύΠϧ࣌ͷDI, AOP
 →ىಈ࣌ͷεΩϟϯ΍ղܾෆཁͳҝɺىಈ͕ૣ͍ • Reactive ProgramingͷϑΝʔετΫϥεαϙʔτ(Reactor, RxJava) • GraalVMͰͷωΠςΟϒίϯύΠϧ΋αϙʔτ • GraphQL,gRPC,Swagger/OpenAPI,Security,kafka,flyway,etc.. • CLI͕ఏڙ͞Ε͍ͯͯɺ৽ن࡞੒࣌͸CLIΛ࢖͏
 sdk man, homebrew ౳ͰΠϯετʔϧՄೳ
28. #jjug #ccc_i4 APIͷίʔυྫ @Controller("/hello") class HelloController { @Get("/") fun index(): String { return "Hello World"; } } ࢀߟݩ: https://micronaut.io/
29. #jjug #ccc_i4 DIͷίʔυྫ interface Engine { val cylinders: Int fun start(): String } @Singleton class V8Engine : Engine { override var cylinders = 8 override fun start(): String { return "Starting V8" } } Ҿ༻: https://docs.micronaut.io/ JSR 303ͷAnnotationΛαϙʔτ @Singleton class Vehicle(
 private val engine: Engine) { fun start(): String { return engine.start() } }
30. #jjug #ccc_i4 ςετίʔυྫʢSpekʣ Ҿ༻: https://docs.micronaut.io/ object HelloControllerSpec : Spek({ describe("HelloController Suite") { var embeddedServer: EmbeddedServer = ApplicationContext.run(EmbeddedServer::class.java) var client: HttpClient = HttpClient.create(embeddedServer.url) it("test /hello responds Hello World") { var rsp: String = client.toBlocking().retrieve("/hello") assertEquals("Hello World", rsp) } afterGroup { client.close() embeddedServer.close() } } })
31. First Step. Install & Create App and IDE Setting
32. #jjug #ccc_i4 Install Micronaut # sdk man $ sdk install micronaut # homebrew $ brew install micronaut
33. #jjug #ccc_i4 Create project # mn create-app {pkgname.appname} —lang kotlin $ mn create-app \ com.merrylab.example.jjugccc2019\ —lang kotlin | Generating Kotlin project... | Application created at /Users/bulbulpaul/ dev/example-code/jjugccc2019
34. #jjug #ccc_i4 IDE Settings • Project ΛImport
 Preferences -> Build -> 
 Compiler -> Annotation Processors • “Enable annotation processing” Λ༗ޮԽ
35. ͜Μͳײ͡ͰMicronautͱ KotlinͰ։ൃͷ४උ͕ Ͱ͖·͢
36. Ͱ͸࣮ࡍʹ ؆୯ͳAPIΛ ࡞ͬͯΈ·͠ΐ͏
37. Demo
38. Ͱ΋…
39. ΋ͬͱ
 KotlinΒ͘͠ ॻ͚ΔͷͰ͸ʁ
40. Micronaut Ͱ΋ એݴతʹॻ͚ͳ͍͔ͳʁ
41. ͨͱ͑͹…
 RoutingΛ Annotation͔Β DSLͱ͔
42. Micronaut with Ktor
43. #jjug #ccc_i4 Ktor • JetBrains੡ͷͱͯ΋ܰྔͳϑϨʔϜϫʔΫ • DI, ϩΪϯά, ςϯϓϨʔτΤϯδϯ, ORM౳͸ແ͍ • ಺෦తʹ Netty, Jetty, Tomcat Λಈ͔ͤΔ • ಛ௃తͳ࢓૊Έͱͯ͠ pipeline • Kotlin ͷ Coroutine ʹ΋ରԠ
44. #jjug #ccc_i4 Ktor ͷDSL ͳRouting routing { get("/") { call.respondText("Hello World!") } get("/demo") { call.respondText("HELLO WORLD!") } } Ҿ༻ݩ: https://ktor.io/
45. #jjug #ccc_i4 routing { get("/") { call.respondText("Hello World!") } get("/demo") { call.respondText("HELLO WORLD!") } } Ktor ͷDSL ͳRouting Ҿ༻ݩ: https://ktor.io/ એݴతʹ͔͚ͯ෼͔Γ΍͍͢ 3PVUJOH͔Β࣮૷Λ௥͍΍͍͢
46. #jjug #ccc_i4 Micronaut x Ktor • Micronaut͸૊ΈࠐΈαʔόʔͱͯ͠
 Netty౳ͷΞϓϦέʔγϣϯαʔόʔΛ࢖͏ • ͦͷؒʹKtorͷ࢓૊ΈΛೖΕͯಈ͔͢ • ݱࡏ͸v1.0.0-M2
47. #jjug #ccc_i4 ಈ࡞Πϝʔδ • Micronautͷ૊ΈࠐΈαʔόʔͷ෦෼ͷؒʹ
 KtorΛೖΕࠐΉܗ
48. #jjug #ccc_i4 ಈ࡞Πϝʔδ • Micronautͷ૊ΈࠐΈαʔόʔͷ෦෼ͷؒʹ
 KtorΛೖΕࠐΉܗ
49. #jjug #ccc_i4 ಈ࡞Πϝʔδ • Micronautͷ૊ΈࠐΈαʔόʔͷ෦෼ͷؒʹ
 KtorΛೖΕࠐΉܗ ϦΫΤετͷϥΠϑαΠΫϧ͸
    ,UPS͕ѻ͏
50. Second Step. Apply Ktor support
51. #jjug #ccc_i4 micronaut-ktor Λ௥Ճ // apply Kotlin Runtime Support implementation("io.micronaut.kotlin:micronaut- kotlin-runtime:1.0.0.M2") implementation("io.micronaut.kotlin:micronaut- ktor:1.0.0.M2") val ktorVersion: String by project implementation("io.ktor:ktor-server-netty: $ktorVersion") implementation("io.ktor:ktor-jackson: $ktorVersion") Ҿ༻ݩ: https://ktor.io/
52. #jjug #ccc_i4 Ktor ͷDSL ͳRouting @Singleton class Route(private val eventListService: EventListService) : KtorRoutingBuilder( { get("/") { call.respond("Hello. JJUG CCC Fall 2019!") } get("/eventlist") { val eventList = eventListService.eventList() call.respond(ApiRespoonse(Status.SUCESS, eventList)) } })
53. Demo
54. ·ͱΊ
55. #jjug #ccc_i4 ·ͱΊ • ͦΕͧΕͷϝϦοτΛ׆͔͠ͳ͕Β
 Server Side KotlinΛ͢Δ͜ͱ͕Ͱ͖·͢ɻ • ΋ͪΖΜ૊ΈࠐΈαʔόʔͷKtorΛ࢖Θͣʹ
 MicronautͷΈͰे෼ʹ։ൃ͸ՄೳͰ͢ɻ • બ୒ࢶ͕͋Δ͜ͱ͕ඇৗʹॏཁͰ
 ݱ৔΍νʔϜͷঢ়گʹ߹ΘͤͯબͿͱྑ͍Ͱ͢ɻ
56. ͋Γ͕ͱ͏͍͟͝·ͨ͠