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SpringBootͱKtorΛ
ࡶʹൺֱͯ͠ΈΔ
ͳ͕ͷJava #1
2020.03.25
@chichi1091
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SpringBootͱKtorΛ
ࡶʹൺֱͯ͠ΈΔ
ͳ͕ͷJava #1
2020.03.25
@chichi1091
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ࣗݾհ
• ࣉౢઍʗͯͬ͠ʔʢ@chichi1091ʣ
• גࣜձࣾHolmes
• αʔόαΠυΤϯδχΞ
• SpringBoot(Java,Kotlin),Groovy
https://chichi1091.hatenablog.jp/
https://github.com/chichi1091
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© Holmes,inc. All right reserved.
ܖϚωδϝϯτγεςϜ
ʮϗʔϜζΫϥυʯ
ܖʹɺ
Ϛωδϝϯτͷ
ࢹΛɻ
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© Holmes,inc. All right reserved.
։ൃڥ
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։ൃʹؔΘΔશ৬छੵۃ࠾༻தͰ͢ʂ
– ϓϩμΫτϚωʔδϟ
– UI/UXσβΠφʔ
– webϑϩϯτΤϯυΤϯδχΞ
– αʔόαΠυΤϯδχΞ
– SRE
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Ktorͱʁ
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Ktorͱʁ
• KotlinΛ։ൃ͍ͯ͠ΔJetBrains͕ࣾ։ൃͨܰ͠ྔ
WebϑϨʔϜϫʔΫ
• featureΛՃ͢Δ͜ͱͰ֦ுػೳͷར༻͕Մೳ
• ςϯϓϨʔτΤϯδϯ
• ೝূػೳ
• DI
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SpringBootͱൺֱ
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SpringBootͱൺֱ
• ීஈ͍ͬͯΔSpringBootͱൺֱ͢Δ͜ͱͰཧղ
ΛਂΊ͔ͨͬͨ
• 100%KotlinͷϑϨʔϜϫʔΫʹڵຯ͕͋ͬͨ
• ӡ༻ʹ͑ΒΕΔ͔ௐ͔ͨͬͨ
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ΈࠐΈAPαʔό
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ΈࠐΈAPαʔόʢSpringBootʣ
• Buildπʔϧʹspring-boot-starter-xxxΛΈࠐΉ
͜ͱͰΓସ͕͑Մೳ
• tomcat
• jetty
• undertow
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ΈࠐΈAPαʔόʢKtorʣ
• Buildπʔϧʹktor-server-xxxΛΈࠐΉ͜ͱͰ
Γସ͕͑Մೳ
• Netty
• jetty
• tomcat
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BootRun
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BootRun
@SpringBootApplication
@Controller
class Application {
@GetMapping("/")
fun index(): String = "Hello, Kotlin"
}
fun main(args: Array) {
runApplication(*args)
}
class Application
fun main(args: Array) {
val server = embeddedServer(Netty, 8080) {
routing {
get("/") {
call.respond(HttpStatusCode.OK,"Hello, Kotlin")
}
}
}
server.start()
}
4QSJOH#PPU
,UPS
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ςϯϓϨʔτΤϯδϯ
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ςϯϓϨʔτΤϯδϯ
• SpringBoot
• Thymeleaf
• Freemarker
• Groovy Template
• Ktor
• Thymeleaf
• Freemarker
• Velocity
• Mustache
• Kotlin DSLͰHTMLCSSΛॻ͘͜ͱՄೳ
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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$44Λੜɾग़ྗ
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ςϯϓϨʔτΤϯδϯʢKotlin DSLʣ
get("/") {
call.respondHtml {
head {
link(rel = "stylesheet", href = "/styles.css", type = "text/css")
}
body{
h1 {
id = "title"
+"ͳ͕ͷJava"
}
p("myclass") {
+"myclass"
}
ul {
for(n in 1..10) {
li {
onClick = "alert($n)"
+"$n"
}
}
}
}
}
}
w ,PUMJOίʔυͰ)5.-Λੜɾग़ྗ
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Controller
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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"
}
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ControllerʢKtorʣ
fun main(args: Array) {
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
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ྫ֎ϋϯυϥʔ
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ControllerʢSpringBootʣ
class ExceptionHandler: ResponseEntityExceptionHandler() {
@ExceptionHandler(Exception::class)
fun handleException(ex: Exception, headers: HttpHeaders, request: WebRequest):
ResponseEntity {
return super.handleExceptionInternal(ex, "handleException", headers
, HttpStatus.INTERNAL_SERVER_ERROR, request)
}
}
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ControllerʢKtorʣ
fun main() {
val server = embeddedServer(Netty, port = 8082) {
install(StatusPages) {
exception{ cause ->
call.respond(HttpStatusCode.InternalServerError)
}
exception{ cause ->
call.respond(HttpStatusCode.Forbidden)
}
}
routing {
userController()
}
}
server.start()
}
class XxxException: RuntimeException()
class AuthorizationException: RuntimeException()
w ྫ֎ʹΑͬͯฦ͢εςʔλείʔυΛ
ఆٛ
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Session
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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
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SessionʢKtorʣ
fun main() {
val server = embeddedServer(Netty, port = 8082) {
install(Sessions) {
cookie("MY_SESSION") {
cookie.extensions["SameSite"] = "lax"
}
}
routing {
get() {
val session: MySession = call.sessions.get()
?: 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
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DBଓ
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DBଓʢSpringBootʣ
@Entity
data class Users (
@Id
@GeneratedValue(strategy=GenerationType.IDENTITY)
val id: Long,
val name: String,
val birthday: Date
)
@Repository
interface UsersRepository: JpaRepository {}
@RestController
class UsersController(
private val usersRepository: UsersRepository
) {
@GetMapping(value = ["/"])
@ResponseStatus(HttpStatus.OK)
fun index(): List = usersRepository.findAll()
}
• ORϚούʔJPA
• τϥϯβΫγϣϯAOPͰ੍ޚ
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DBଓʢKtorʣ
• ORϚούʔExposed
• ͪΖΜKotlin
• JetBrains͕ࣾ։ൃ
• BootRun࣌ʹH2ଓ
fun main(args: Array) {
// DBଓ
Database.connect("jdbc:h2:mem:ktor_db;DB_CLOSE_DELAY=-1", "org.h2.Driver")
val server = embeddedServer(Netty, 8080) {
routing {
userController()
}
}
server.start()
}
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DBଓʢKtorʣ
// Dao
object Users : LongIdTable() {
val name: Column = varchar("name", 50)
val birthday: Column = date("birthday")
}
// Entity
class User(id: EntityID): LongEntity(id) {
companion object : LongEntityClass(Users)
var name by Users.name
var birthday by Users.birthday
}
fun Route.userController() {
val service by inject()
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 = listOf()
transaction {
result = User.all().sortedByDescending{ it.birthday }
}
call.respondText { "users routing ${service.getName()}" }
}
}
}
w 42-ൃߦ࣌USBOTBDUJPOඞਢ
w ݕࡧଞʹ
val user: SizedIterable =
User.find { Users.id eq 1 }
val user: User? = User.findById(1L)
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JSON
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JSONʢSpringBootʣ
@RestController
@RequestMapping("/users")
class UsersApplication{
@GetMapping("/")
fun list(request: HttpServletRequest): ResponseEntity {
val json = Json(1,"Kotlin")
return ResponseEntity.of(Optional.of(json))
}
}
data class Json(
private val id: Int,
private val name: String
)
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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
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DI
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DIʢSpringBootʣ
@Service
class UserService {
fun getName(): String {
return "Kotlin"
}
}
@RestController
class UserController(
private val userService: UserService
) {
@GetMapping("/")
fun index(): String {
return "Hello, ${userService.getName()}"
}
}
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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()
}
class UserService {
fun getName(): String{
return "Kotlin"
}
}
fun Route.userController() {
val service by inject()
route("/users") {
get() {
call.respondText { "users routing ${service.getName()}" }
}
}
}
w JOTUBMM ,PJO
Ͱ%*ίϯςφొ
w γϯάϧτϯͰ6TFS4FSWJDFΛొ
w JOKFDUͰऔಘ
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·ͱΊ
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·ͱΊ
• SpringBootͱಉͷfeature͕ἧ͍ͬͯΔΑ͏ʹ
ײͨ͡
• υΩϡϝϯτΘ͔Γ͍͢(https://ktor.io/)
• Githubͷߋ৽׆ൃ
• featureͲΜͲΜ૿͑ͦ͏ʁ
• SpringBootΑΓKotlinͬΆ͍ίʔυ͕ॻ͚Δ
• ຊ൪ར༻͑ΒΕͦ͏