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SpringBootとKtorを雑に比較してみる
てっしー
March 25, 2020
Programming
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SpringBootとKtorを雑に比較してみる
てっしー
March 25, 2020
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Transcript
SpringBootͱKtorΛ ࡶʹൺֱͯ͠ΈΔ ͳ͕ͷJava #1 2020.03.25 @chichi1091
SpringBootͱKtorΛ ࡶʹൺֱͯ͠ΈΔ ͳ͕ͷJava #1 2020.03.25 @chichi1091
ࣗݾհ • ࣉౢઍʗͯͬ͠ʔʢ@chichi1091ʣ • גࣜձࣾHolmes • αʔόαΠυΤϯδχΞ • SpringBoot(Java,Kotlin),Groovy https://chichi1091.hatenablog.jp/
https://github.com/chichi1091
© Holmes,inc. All right reserved. ܖϚωδϝϯτγεςϜ ʮϗʔϜζΫϥυʯ ܖʹɺ Ϛωδϝϯτͷ ࢹΛɻ
© Holmes,inc. All right reserved. ։ൃڥ
։ൃʹؔΘΔશ৬छੵۃ࠾༻தͰ͢ʂ – ϓϩμΫτϚωʔδϟ – UI/UXσβΠφʔ – webϑϩϯτΤϯυΤϯδχΞ – αʔόαΠυΤϯδχΞ –
SRE
Ktorͱʁ
Ktorͱʁ • KotlinΛ։ൃ͍ͯ͠ΔJetBrains͕ࣾ։ൃͨܰ͠ྔ WebϑϨʔϜϫʔΫ • featureΛՃ͢Δ͜ͱͰ֦ுػೳͷར༻͕Մೳ • ςϯϓϨʔτΤϯδϯ • ೝূػೳ
• DI
SpringBootͱൺֱ
SpringBootͱൺֱ • ීஈ͍ͬͯΔSpringBootͱൺֱ͢Δ͜ͱͰཧղ ΛਂΊ͔ͨͬͨ • 100%KotlinͷϑϨʔϜϫʔΫʹڵຯ͕͋ͬͨ • ӡ༻ʹ͑ΒΕΔ͔ௐ͔ͨͬͨ
ΈࠐΈAPαʔό
ΈࠐΈAPαʔόʢSpringBootʣ • Buildπʔϧʹspring-boot-starter-xxxΛΈࠐΉ ͜ͱͰΓସ͕͑Մೳ • tomcat • jetty • undertow
ΈࠐΈAPαʔόʢKtorʣ • Buildπʔϧʹktor-server-xxxΛΈࠐΉ͜ͱͰ Γସ͕͑Մೳ • Netty • jetty • tomcat
BootRun
BootRun @SpringBootApplication @Controller class Application { @GetMapping("/") fun index(): String
= "Hello, Kotlin" } fun main(args: Array<String>) { runApplication<BlogApplication>(*args) } class Application fun main(args: Array<String>) { val server = embeddedServer(Netty, 8080) { routing { get("/") { call.respond(HttpStatusCode.OK,"Hello, Kotlin") } } } server.start() } 4QSJOH#PPU ,UPS
ςϯϓϨʔτΤϯδϯ
ςϯϓϨʔτΤϯδϯ • SpringBoot • Thymeleaf • Freemarker • Groovy Template
• Ktor • Thymeleaf • Freemarker • Velocity • Mustache • Kotlin DSLͰHTMLCSSΛॻ͘͜ͱՄೳ
ςϯϓϨʔτΤϯδϯʢKotlin DSLʣ get("/styles.css") { call.respondCss { body { backgroundColor =
Color.red } p { fontSize = 2.em } rule("p.myclass") { color = Color.blue } } } suspend inline fun ApplicationCall.respondCss(builder: CSSBuilder.() -> Unit) { this.respondText(CSSBuilder().apply(builder).toString(), ContentType.Text.CSS) } w ,PUMJOίʔυͰ$44Λੜɾग़ྗ
ςϯϓϨʔτΤϯδϯʢKotlin DSLʣ get("/") { call.respondHtml { head { link(rel =
"stylesheet", href = "/styles.css", type = "text/css") } body{ h1 { id = "title" +"ͳ͕ͷJava" } p("myclass") { +"myclass" } ul { for(n in 1..10) { li { onClick = "alert($n)" +"$n" } } } } } } w ,PUMJOίʔυͰ)5.-Λੜɾग़ྗ
Controller
ControllerʢSpringBootʣ @Controller //@RestController @RequestMapping("/users") class UsersApplication{ @GetMapping("/") fun list(): String
= "users routing ok" @GetMapping("/{id}") fun index(@PathVariable(“id") id: String): String = "user $id routing ok" }
ControllerʢKtorʣ fun main(args: Array<String>) { val server = embeddedServer(Netty, 8080)
{ routing { userController() } } server.start() } fun Route.userController() { route("/users") { get() { call.respondText { "users routing ok" } } get("/{id}") { val id = call.parameters["id"] call.respond(HttpStatusCode.OK, "user $id routing ok") } } } w SPVUFͰΤϯυϙΠϯτΛࢦఆ w ͦͷதʹϧʔςΟϯάઃఆ͠ΞΫγϣ ϯΛࢦఆ͢Δ
ྫ֎ϋϯυϥʔ
ControllerʢSpringBootʣ class ExceptionHandler: ResponseEntityExceptionHandler() { @ExceptionHandler(Exception::class) fun handleException(ex: Exception, headers:
HttpHeaders, request: WebRequest): ResponseEntity<Any> { return super.handleExceptionInternal(ex, "handleException", headers , HttpStatus.INTERNAL_SERVER_ERROR, request) } }
ControllerʢKtorʣ fun main() { val server = embeddedServer(Netty, port =
8082) { install(StatusPages) { exception<XxxException>{ cause -> call.respond(HttpStatusCode.InternalServerError) } exception<AuthorizationException>{ cause -> call.respond(HttpStatusCode.Forbidden) } } routing { userController() } } server.start() } class XxxException: RuntimeException() class AuthorizationException: RuntimeException() w ྫ֎ʹΑͬͯฦ͢εςʔλείʔυΛ ఆٛ
Session
SessionʢSpringBootʣ @Controller //@RestController @RequestMapping("/users") class UsersApplication{ @GetMapping("/") fun list(request: HttpServletRequest):
String { val session = request.session session.setAttribute("key", "name") val name = session.getAttribute("key") return "users routing ok" } } w Լهͷྫ4FTTJPOΛར༻͢Δํ๏ w ଞʹ w !4FTTJPO"UUSJCVUFT w !4DPQF ηογϣϯείʔϓ
SessionʢKtorʣ fun main() { val server = embeddedServer(Netty, port =
8082) { install(Sessions) { cookie<MySession>("MY_SESSION") { cookie.extensions["SameSite"] = "lax" } } routing { get() { val session: MySession = call.sessions.get<MySession>() ?: MySession("1") call.sessions.set("MY_SESSION", session.copy("2")) call.respondText { "users routing ${session.id}" } } } } server.start() } data class MySession ( val id: String ) w ʮ.:@4&44*0/ʯ͕$PPLJF໊
DBଓ
DBଓʢSpringBootʣ @Entity data class Users ( @Id @GeneratedValue(strategy=GenerationType.IDENTITY) val id:
Long, val name: String, val birthday: Date ) @Repository interface UsersRepository: JpaRepository<Users, Long> {} @RestController class UsersController( private val usersRepository: UsersRepository ) { @GetMapping(value = ["/"]) @ResponseStatus(HttpStatus.OK) fun index(): List<Users> = usersRepository.findAll() } • ORϚούʔJPA • τϥϯβΫγϣϯAOPͰ੍ޚ
DBଓʢKtorʣ • ORϚούʔExposed • ͪΖΜKotlin • JetBrains͕ࣾ։ൃ • BootRun࣌ʹH2ଓ fun
main(args: Array<String>) { // DBଓ Database.connect("jdbc:h2:mem:ktor_db;DB_CLOSE_DELAY=-1", "org.h2.Driver") val server = embeddedServer(Netty, 8080) { routing { userController() } } server.start() }
DBଓʢKtorʣ // Dao object Users : LongIdTable() { val name:
Column<String> = varchar("name", 50) val birthday: Column<DateTime> = date("birthday") } // Entity class User(id: EntityID<Long>): LongEntity(id) { companion object : LongEntityClass<User>(Users) var name by Users.name var birthday by Users.birthday } fun Route.userController() { val service by inject<UserService>() route("/users") { post() { SchemaUtils.create(Users) // ϚΠάϨʔγϣϯ val cal = Calendar.getInstance() cal.set(Calendar.YEAR, 2020) cal.set(Calendar.MONTH, 3 -1) cal.set(Calendar.DAY_OF_MONTH, 25) val today = DateTime(Calendar.getInstance().timeInMillis) transaction { User.new { name = "kotlin ktor" birthday = DateTime(today) } } call.respondText { "users insert" } } put() { transaction { Users.update ({ Users.id eq 1 }) { it[Users.name] = "kotlin OExposed" } } call.respondText { "users update" } } delete() { transaction { Users.deleteWhere { Users.id eq 1 } } call.respondText { "users delete" } } get() { var result: List<User> = listOf() transaction { result = User.all().sortedByDescending{ it.birthday } } call.respondText { "users routing ${service.getName()}" } } } } w 42-ൃߦ࣌USBOTBDUJPOඞਢ w ݕࡧଞʹ val user: SizedIterable<User> = User.find { Users.id eq 1 } val user: User? = User.findById(1L)
JSON
JSONʢSpringBootʣ @RestController @RequestMapping("/users") class UsersApplication{ @GetMapping("/") fun list(request: HttpServletRequest): ResponseEntity<Json>
{ val json = Json(1,"Kotlin") return ResponseEntity.of(Optional.of(json)) } } data class Json( private val id: Int, private val name: String )
JSONʢKtorʣ fun main() { val server = embeddedServer(Netty, port =
8082) { install(ContentNegotiation) { jackson { configure(SerializationFeature.INDENT_OUTPUT, true) } } routing { get() { call.respond(Json(1, "Ktor")) } } } server.start() } data class Json( private val id: Int, private val name: String ) w JOTUBMMͰ+BDLTPOͷઃఆ w ฦ٫͞ΕΔ+40/Λܗ
DI
DIʢSpringBootʣ @Service class UserService { fun getName(): String { return
"Kotlin" } } @RestController class UserController( private val userService: UserService ) { @GetMapping("/") fun index(): String { return "Hello, ${userService.getName()}" } }
DIʢKtorʣ • KtorͰDI͢ΔʹʮKodeinʯ͔ʮKoinʯΛ͏ • ࠓճKoin fun main() { val server
= embeddedServer(Netty, port = 8082) { install(Koin) { modules(module) } routing { userController() } } server.start() } val module = module(createdAtStart = true) { singleBy<UserService, UserService>() } class UserService { fun getName(): String{ return "Kotlin" } } fun Route.userController() { val service by inject<UserService>() route("/users") { get() { call.respondText { "users routing ${service.getName()}" } } } } w JOTUBMM ,PJO Ͱ%*ίϯςφొ w γϯάϧτϯͰ6TFS4FSWJDFΛొ w JOKFDUͰऔಘ
·ͱΊ
·ͱΊ • SpringBootͱಉͷfeature͕ἧ͍ͬͯΔΑ͏ʹ ײͨ͡ • υΩϡϝϯτΘ͔Γ͍͢(https://ktor.io/) • Githubͷߋ৽׆ൃ • featureͲΜͲΜ૿͑ͦ͏ʁ
• SpringBootΑΓKotlinͬΆ͍ίʔυ͕ॻ͚Δ • ຊ൪ར༻͑ΒΕͦ͏