DDD + Clean Architecture + UCDOM Essence版

by Yoshitaka Okuda

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DDD + Clean Architecture ʴϢʔεέʔεۦಈ։ൃͷྑ͍ͱ͜ΖΛऔΓೖΕΑ͏ 2016/03/16 @yoskhdia DDD+CQRS+EventSourcing࣮૷͢Δձ

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About me • ԞాՂڗʢYoshitaka Okudaʣ • גࣜձࣾSocketʢKDDI Syn.ϗʔϧσΟϯάεάϧʔϓʣ  ΞʔΩςΫτ • Twitter @yoskhdia • interested in DDD/Scala/C#/Reactive System/  Architect/System Thinking/Team Building/  Agile/ܦӦ৘ใֶ/On-Road Bike

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Agenda • υϝΠϯۦಈઃܭʢDDDʣ͓͞Β͍ • Clean Architectureͱ͸Կ͔ • DDD + Clean Architectureମݧஊ • Ϣʔεέʔεۦಈ։ൃʢICONIXϓϩηεʣʹ ग़ձͬͨ࿩

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ཹҙࣄ߲ • ͜ͷൃද͸ࢲݸਓͷݟղʹدΔ΋ͷͰ͢ɻ • ॻ੶ʮυϝΠϯۦಈઃܭʯ΋ਖ਼ࣜʹ͸ʮΤϦοΫɾΤϰΝϯ εͷʯͱ෇͘Α͏ʹɺDDD͸ϕετϓϥΫςΟεΛ·ͱΊͨ ஌ࣝମܥͰ͋Γɺઈରͷਖ਼ղͷ͋Δ΋ͷͰ͸͋Γ·ͤΜɻ • ࠾༻͢ΔϓϩμΫτͷੑ֨ʹΑͬͯɺ۩ମతͳํ๏͸มΘΓ ·͢ɻʢࠓճ͸UIΛ࣋ͨͳ͍APIͰߟ͍͑ͯ·͢ɻʣ • ͦͷͨΊɺ͜͏͍͏෩ʹద༻͍ͯ͠Δਓ΋͍ΔΜͩͳɺͱ͍ ͏Թ͔͍৺Ͱ͓ئ͍͍ͨ͠·͢...

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υϝΠϯۦಈઃܭʢDDDʣ ͓͞Β͍ ίΞυϝΠϯ ϢϏΩλεݴޠ ϞσϧΛ୳ٻ

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ͬ͘͟ΓDDD • υϝΠϯۦಈઃܭ͸ݴ༿Λେ੾ʹ͢Δ։ൃख๏ • ΤΫετϦʔϜϓϩάϥϛϯάʢXPʣΛϕʔ εʹϞσϧۦಈઃܭΞϓϩʔνΛద༻͍ͯ͠Δ • νʔϜͷڌΓॴͱͳΓಘΔ • ໎ͬͨΒಡΉ

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ݴ༿ͷఆٛʢݪଇʣ • υϝΠϯʢDomainʣ • Ϗδωεશମͷ໰୊ྖҬͦͷ΋ͷͷ͜ͱɻιϑτ΢ΣΞͰղܾ͢Δͷ͸ɺ͜ͷҰ෦ɻ • υϝΠϯϞσϧʢDomain Modelʣ • υϝΠϯʹରͯ͠ɺͦͷղܾࡦʢιϦϡʔγϣϯʣΛϞσϧԽͨ͠΋ͷɻ • υϝΠϯΤΩεύʔτʢDomain Expertʣ • υϝΠϯʹਫ਼௨͍ͯ͠ΔਓɻҰਓͰ͋Δ͜ͱ΋͋Ε͹ෳ਺ਓͰ͋Δ͜ͱ΋͋Δɻ • ίΞυϝΠϯʢCore Domainʣ • υϝΠϯ͸͍͔ͭ͘ͷྖҬʹ෼ׂ͢Δ͜ͱ͕ଟ͍ɻ͜ͷ࣌ɺҰ൪ϏδωεՁ஋ͷߴ͍ྖ ҬΛίΞυϝΠϯͱ͍͏ɻ࣌ؒ΍ਓ͸༗ݶͳͷͰίΞυϝΠϯΛݟ͚ͭͯɺͦ͜ʹ஫ྗ ͢Δ͜ͱ͕ॏཁɻ

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ݴ༿ͷఆٛʢݪଇʣ • ϢϏΩλεݴޠʢUbiquitous Languageʣ • ίʔυΛॻ͍͍ͯΔͱΦϨΦϨ໋໊Λ͕ͪ͠ɻ͢ΔͱɺυϝΠϯΤΩεύʔτ ͱ࿩Λ͢Δͱ͖ʹݴ༿ͷ຋༁͕ൃੜ͢Δɻ͜͏ͳΔͱɺυϝΠϯΤΩεύʔτ ͷඳ͘Ϟσϧͱίʔυ͕ဃ཭͍ͯͬͯ͠͠·͏ͷͰɺυϝΠϯΤΩεύʔτΛ ؚΉνʔϜશମͰಉ͡ݴ༿Λ࢖͏Α͏ʹ߹ҙ͢Δɻ • ڥք͚ͮΒΕͨίϯςΩετʢBounded Contextʣ • จ຺ʢίϯςΩετʣʹΑͬͯɺಉ͡ݴ༿ͳͷʹҟͳΔҙຯʹͳΔ͜ͱ͕͋Δɻ υϝΠϯϞσϧ͸େ͖͘ͳΓ͕ͪͳͷͰɺҰ؏ੑΛอͬͨ··εέʔϧ͢Δʹ ͸ɺίϯςΩετͷڥքΛϋοΩϦͤͯ͞ҙຯͷมΘΒͳ͍৔ॴΛ࡞Δɻίϯ ςΩετϚοϓͱ͍͏πʔϧΛ࢖ͬͨΓ͢Δɻ  InfoQʮίϯςΩετϚοϐϯάʹΑΔઓུతυϝΠϯۦಈઃܭʯΛࢀর

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υϝΠϯͱίϯςΩετͷؔ܎ υϝΠϯ ίϯςΩετ αϒυϝΠϯ ίΞυϝΠϯ • ఺ઢɿ  υϝΠϯڥք • ੺࣮ઢɿ  ίϯςΩετڥք • ίϯςΩετ͸͍ ͔ͭ͘ͷυϝΠϯ ڥքʹލΔ͜ͱ͕ ͋Δ • ཧ૝͸αϒυϝΠ ϯͱίϯςΩετ ͕1ର1 αϒυϝΠϯ

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ଓ͖͸ࢀߟࢿྉͰ

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DDDΛ΍Δҙٛ • υϝΠϯϞσϧ͕ચ࿅͞Ε͍ͯ͘͜ͱͰɺ • ʮۀ຿஌ࣝʯ-ʮݴ༿ʯ-ʮίʔυʯ͕࿈ಈ • ֎͔ΒͷมԽʹదԠ͠΍͘͢ • ։ൃΛਐΊΔ͜ͱʹΑͬͯൃݟ͞ΕΔ৽ͨͳ ஌ݟΛϏδωε΁ؐݩ

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–Jim HighsmithࢯʮWhat is Agility?ʯ “ΞδϟΠϧ͞ͱ͸ɺܹม͢ΔϏδωε؀ ڥʹ͓͍ͯརӹΛੜΈग़ͨ͢ΊʹɺมԽ ʹରԠ͢Δͱಉ࣌ʹɺมԽΛ࡞Γग़͢ೳ ྗͰ͋Δɻ”

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ͦΕΛ࣮ફ͢ΔͨΊͷDDD υϝΠϯϞσϦϯάΛ௨ͯ͡ ։ൃऀ͕Ϗδωεʹد༩͢Δ

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Clean Architectureͱ͸Կ͔ γεςϜʹߏ଄Λ༩͑ ґଘؔ܎نଇΛఆٛ͢Δ

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ଞͷΞʔΩςΫνϟ -BZFSFE"SDIJUFDUVSF ૚Ͱ෼཭ Πϯϑϥʹґଘ )FYBHPOBM"SDIJUFDUVSF ΠϯϑϥΛ֎෦Խ "EBQUFSͰܨ͙ 0OJPO"SDIJUFDUVSF "QQMJDBUJPO Λ૚Խ

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͍ͣΕ΋ ιϑτ΢ΣΞΛ෼ׂ͠ ߏ଄Λ໌֬ʹ͢Δ ͭ·Γɺؔ৺ࣄͷ෼཭

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Clean Architecture ΋ͦͷҰ೿

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CMPHUIMJHIUDPNVODMFCPCUIF DMFBOBSDIJUFDUVSFIUNM

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Hexagonal΍Onionͱૂ͍͸ಉ͡ • ϑϨʔϜϫʔΫͱ͍͏੍໿ʹγεςϜΛ٧ΊࠐΉͷ Ͱ͸ͳ͘ɺγεςϜʹϑϨʔϜϫʔΫΛ౰ͯ͸ΊΔ • ϑϨʔϜϫʔΫ͔Βಠཱ͢Δ ㅟ ㅟ ㅟ ㅟ • UI͔Βಠཱ͢Δ ㅟ ㅟ ㅟ ㅟ • σʔλϕʔε͔Βಠཱ͢Δ ㅟ ㅟ ㅟ ㅟ • ೚ҙͷ֎෦ϦιʔεɺαʔϏε͔Βಠཱ͢Δ ㅟ ㅟ ㅟ ㅟ

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%PNBJO૚ اۀશମͷϏδωεϧʔϧ ΛΧϓηϧԽ 6TF$BTF૚ ΞϓϦέʔγϣϯͷ ϏδωεϧʔϧΛΧϓηϧԽ "EBQUFS૚ ಺ͱ֎ͷσʔλͷม׵͕ओ 'SBNFXPSL%SJWFS૚ ۩ମతͳπʔϧ

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ཁࢫ • ඇৗʹγϯϓϧͳϧʔϧͳͷͰ෼͔Γ΍͍͢ • ૚Ͱ෼཭ • େ੾ͳ΋ͷΛ಺ଆʹஔ͘ • ґଘؔ܎نଇʢ಺ଆʹͷΈґଘʣΛकΔ • ಠཱੑ͸ςετͷ༰қੑʹ΋ߩݙ͢Δ • ٕज़͕ݹ͘ͳͬͨΒ࠷খݶͷखؒͰަ׵Ͱ͖Δ • ϑϨʔϜϫʔΫΛަ׵͢Δ͜ͱ͸͋ͬͯ΋ɺυϝΠϯ஌ࣝΛަ׵ ͢Δͱ͍͏ͷ͸͋Γಘͳ͍

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ઃܭͷϙΠϯτɿڥքͷԣஅ • ԁͷํʹ໨͕ߦ͖͕͚ͪͩΕͲɺઃܭͷ͏ ͑Ͱ͸͕ͬͪ͜ॏཁ • ௨ৗɺController͔Βೖ͖ͬͯͯPresenter ʹग़ͯߦ͘ྲྀΕ • UseCase͸֎૚Λ஌Βͳ͍ͷͰɺग़ྗΛฦ ͢ʹ͸ґଘؔ܎ٯసͷݪଇΛ࢖͍ͬͯΔ  ʢDependency Inversion Principleʣ • ૚ͷڥքΛอͪͳ͕ΒॲཧϑϩʔΛ࣮ݱ ৄࡉ͸ޙ΄Ͳ

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DDD + Clean Architecture ମݧஊ Clean Architecture͸෼͔Γ΍͍͢ DDDͷ࣮ફ͸νʔϜͰόϥϯεΛߟ͑Δ

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࣮૷αϯϓϧ  github.com/yoskhdia/ cleanArchSample

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ύοέʔδߏ੒ • Domain(Entities)૚ • Contract૚ • Domain૚ͱͷڮ౉͠  ʢDIΛ࢖͏ͷͰΠϯλϑΣʔε͸ผʹ͍ͯ͠Δʣ • UseCase૚ • Adapter૚ • Repositoryͷ࣮૷Ϋϥε΋͜͜ • ʢExternal૚ʣ • ϑϨʔϜϫʔΫ΍ϥΠϒϥϦͷ૚ͱ͍͏Ґஔ͚ͮ ̐૚Ͱͳͯ͘΋0,

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Domain(Entities)૚ • POSO(Plain Old Scala Object)͕جຊ • ϑϨʔϜϫʔΫ΁ͷґଘ͚ͩͰͳ͘ɺϥΠϒ ϥϦ΁ͷґଘ΋ۃྗগͳ͘ • ࠓͷͱ͜ΖJoda-TimeͷΈʢJava8 Date and Time API΁ͷҠߦ͸ݕ౼தʣ

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Contract/UseCase૚ *OQVU1PSUͷ࣮૷͸ 6TF$BTF͕ߦ͏ ґଘؔ܎ٯసͷݪଇͰ6TF$BTF ͸0VUQVU1PSUʹग़ྗΛ౉͚ͩ͢ ʹ૚͕ด͡ΒΕΔ 0VUQVU1PSUͷ࣮૷͸ 1SFTFOUFS͕ߦ͏

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Use Case import scala.concurrent.{ExecutionContext, Future}    trait UseCase {  type In    type Out    protected def call(arg: In)(implicit ec: ExecutionContext): Future[Out]  } "EBQUFS૚ͱͷ࿈ܞ͸1PSUʹҕৡ

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Input Port import scala.concurrent.ExecutionContext  import scala.util.{Failure, Success}  trait PushPort[Arg, Result] {  self: UseCase =>    override final type In = Arg    override final type Out = Result    def execute[T <: Callback[Result]](arg: Arg)(callback: T)  (implicit ec: ExecutionContext): Unit = {  call(arg).onComplete {  case Success(result) =>  callback.onSuccess(result)  case Failure(t) =>  callback.onFailure(t)  }  }  } "EBQUFS૚͔ΒͲ͏໯͏͔ ԿΛฦ͔͢Λఆٛ *OQVU1PSUͷ໾ׂ͸ ड͚औΔ͜ͱ·ͰͳͷͰ 6OJUΛฦ͢

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Output Port trait Callback[Result] {    def onSuccess(result: Result): Unit    def onFailure(t: Throwable): Unit  } ΞϓϦέʔγϣϯϩδοΫͷΤϥʔ΋ ಛผͳ&YDFQUJPOΛ༻ҙͯ͠ฦ͢Α͏ʹ͍ͯ͠Δ ʢ+BWBͷ׳शʹ͍ۙʣ ※Callback vs Promise(Future)͸Full൛Ͱิ଍

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Clean ArchitectureΛ ద༻͢ΔͨΊͷิॿ͸͜Ε͚ͩ

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Use Caseͷఆٛ package contract.usecase    import contract.{PushPort, UseCase}  import domain.{GroupId, UserId}    trait PickLeaderUseCase extends UseCase with PushPort[GroupId, UserId] ࣮͸αϘ͍ͬͯΔ 6TF$BTF૚Ͱѻ͍΍͍͢ ΦϒδΣΫτ %50 ʹ͢Δ

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Use Caseͷ࣮૷ package usecase    import javax.inject.Inject  import contract.usecase.PickLeaderUseCase  import domain.UserRepository    import scala.concurrent.{ExecutionContext, Future}    class PickLeaderUseCaseImpl @Inject()(userRepository: UserRepository) extends PickLeaderUseCase {    override protected def call(groupId: In) (implicit ec: ExecutionContext): Future[Out] = {  userRepository.findBy(groupId).map { board =>  board.pickLeader // ୭ΛͲ͏Ϧʔμʹ͢Δ͔͸υϝΠϯ஌ࣝ  }  }  } ΠϯλϑΣʔεΛ࢖͏ %*ͰґଘΛ୯ํ޲ʹ

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Adapter૚ 3FQPTJUPSZͷ࣮૷Ϋϥε΋ ͜ͷ૚ͷத 42-ఆٛͳͲ ֎͔ΒͷೖྗΛ ಺ଆͷΦϒδΣΫτʹม׵ ྫɿ1045͞Εͨσʔλ ಺͔Βͷग़ྗΛ ֎ଆͷσʔλʹม׵ ྫɿ+40/

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Controller import contract.usecase.PickLeaderUseCase  import domain.GroupId  import play.api.data._  import play.api.libs.concurrent.Execution.Implicits.defaultContext  import play.api.mvc.{Action, Controller}    class GroupController @Inject() (useCase: PickLeaderUseCase, presenter: PickedLeaderPresenter) extends Controller {   val form: Form[GroupId] = ??? // ׂѪ  def pickLeader = Action.async { implicit request =>  form.bindFromRequest.fold(_ => Future.successful(BadRequest("…")), (groupId: GroupId) =>  presenter.response(useCase.execute(groupId))  )  }  } ͜ͷॻ͖ํʹ͍ͭͯ͸'VMM൛Ͱิ଍ ೖྗσʔλ͔Βͷม׵͕੹຿

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Presenter import contract.callback.PickedLeaderCallback  import domain.UserId  import play.api.libs.json.Json  import scala.concurrent.{ExecutionContext, Future, Promise}    class PickedLeaderPresenter extends Presenter[PickedLeaderCallback] {    implicit val writer = Json.writes[UserId]    override def response(call: UseCaseExecutor) (implicit ec: ExecutionContext): Future[Rendered] = {  val callback = new CallbackImpl  call(callback)  callback.promise.future.map { userId =>  Ok(Json.toJson(userId))  }  }  } ग़ྗσʔλ΁ͷม׵͕੹຿

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ControllerͰPresenterͷ໾ׂΛ ݉೚ͯ͠΋ྑ͍ͷͰ͸ʁ • ࠓճͷΑ͏ͳখن໛ͳ΋ͷͩͱɺͻͱͭͷΫϥ εʹશ෦ॻ͍ͯ͠·͍ͨ͘ͳΔ • ໾ׂͷҟͳΔ΋ͷΛҰͭͷΫϥεʹೖΕΔͷ ͸୯Ұ੹೚ͷݪଇʹ൓͢Δ • Controller͸ೖྗͷม׵ɺPresenter͸ग़ྗͷ ม׵ʹઐ೦͢Δ͜ͱͰංେԽ͕๷͛Δʢίʔ υ͸੒௕͢Δʣ

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ϓϩμΫτͰͷऔΓ૊Έ

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୊ࡐ֓ཁ • ϑϩϯτͱAjaxͰ΍ΓऔΓ͢ΔAPIαʔϏε • ݱߦͰ͸RailsͰ࡞ΒΕ͍ͯͯɺࠓճ͸ϦϓϨʔε • ࢓༷͸ݱߦ౿ऻ • Ϟσϧ͸ActiveRecord͔Β୤٫ • Scala + Play! Framework • ߴෛՙ • ग़དྷΔݶΓ1౓ͷϦΫΤετʹ͓͞Ί͍ͨ • σʔλετΞͳͲ֎෦Ϧιʔε΁ͷΞΫηε͕ूத @@'MJQEFTL@@

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DDD + Clean ArchitectureͰ σʔλΞΫηεΛίϯτϩʔϧ༰қʹ • DDDʹै͏ͱRepositoryΛ࢖͏ݸॴ͸ΞϓϦέʔγϣ ϯαʔϏεʢUseCaseʣ͔υϝΠϯαʔϏεʹݶఆ͞ Ε͍ͯ͘ • ू໿(Aggregate)͕ϥΠϑαΠΫϧ·Ͱ୲͏ͱ੹຿ ͕େ͖͘ͳΓ͗͢ΔʢIDDD p.254ʣ • ࣗવͱσʔλΞΫηεݸॴ͕෼͔Γ΍͘͢ ※υϝΠϯαʔϏεɿෳ਺ͷΤϯςΟςΟʹ·͕ͨΔৼΔ෣͍ͳͲɺΤϯςΟςΟ͕ ࣋ͭʹ͸ద͞ͳ͍ৼΔ෣͍Λఆٛͨ͠υϝΠϯΦϒδΣΫτ

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DDD + Clean ArchitectureͰ σʔλΞΫηεΛίϯτϩʔϧ༰қʹ • ࠓͷͱ͜ΖυϝΠϯαʔϏεͰRepositoryΛ࢖͍͍ͨέʔε͸ग़͍ͯ ͳ͍ͷͰɺUseCaseͰͷΈRepositoryΛ࢖͑ΔΑ͏ʹͯ͠ࢼ͍ͯ͠Δ • ҙਤͤͣԿ౓΋ݺͼग़ͯ͠͠·͏Մೳੑ͕͋Δˍ࢖͑Δঢ়ଶͩͱ࢖ ͍ͨ͘ͳΔͷ͕ਓ৘ͳͷͰActiveRecordͷೋͷ෣͍ʹͳΒͳ͍Α͏ ஫ҙΛ෷͍ͬͯΔ • ґଘؔ܎نଇʹΑͬͯ૚͕ด͡ΒΕ͍ͯΔͷͰɺͲ͜ͰσʔλΞΫ ηε͍ͯ͠Δ͔෼͔Γ΍͘͢ͳͬͨ • σʔλετΞ͕Ұ൪֎ͳͷͰަ׵͕͠΍͘͢ͳͬͨɻElasticsearch ൛ͱDynamo൛ͰύϑΥʔϚϯεൺֱ͔ͯ͠Β࠾༻ΛܾΊΔ౳Մೳ

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೉͍͠఺ • υϝΠϯΦϒδΣΫτΛUseCaseͰ༻ҙͯ͠ࢦࣔΛग़͢ ඞཁ͕͋ΔͷͰɺจ຺ͱͯࣗ͠વͳͷ͔ɺೲಘͰ͖Δ͔ Λ܁Γฦ͠ߟ͑Δඞཁ͕͋Δɻ • υϝΠϯαʔϏεࣗମ͕ͦ΋ͦ΋ۃྗ࢖Θͳ͍ํ͕ྑ ͍΋ͷͰ͸͋Δ͚ΕͲɺෳ਺ͷΤϯςΟςΟʹؔ܎͢ ΔΑ͏ͳৼΔ෣͍͸υϝΠϯαʔϏεͷํ͕ࣗવɻ • ៉ྷͳDDDͱγϏΞͳύϑΥʔϚϯεཁ݅ͷόϥϯεΛ ৗʹߟ͑Δ

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τϥϯβΫγϣϯʹ͍ͭͯ • "ू໿ʢAggregateʣ͸τϥϯβΫγϣϯ੔߹ੑͷڥքͱಉٛ" ʢIDDD p.340ʣͳͷͰɺҰͭͷू໿Λѻ͍ͬͯΔؒ͸Repositoryͷ தʹด͡Δ͜ͱ͕Ͱ͖Δɻ • ໰୊͸ɺෳ਺ͷू໿ͷߋ৽Λ୯ҰͷτϥϯβΫγϣϯ಺ͰߦΘͳ͚ Ε͹͍͚ͳ͍࣌ 1. ݁Ռ੔߹ੑͰे෼Ͱ͸ͳ͍͔Λݕ౼͢Δ  ˠτϥϯβΫγϣϯͷແ͍ੈք΁ʢႈ౳ͳૢ࡞͸ඞཁʣ 2. ৽͍͠ू໿ͱͯ͠ఆٛ͢Δ  ˠ͜ΕΛ܁Γฦ͢ͱڊେͳू໿ʹͳͬͯ͠·͏ͷͰ஫ҙ

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ίωΫγϣϯʹ͍ͭͯ • RepositoryΛUseCase૚ʹݶఆ͍ͯ͠ΔͷͰίωΫγϣ ϯΦϒδΣΫτ͕ݱΕΔͷ͸͜͜·ͰͰࡁΜͰ͍Δ… • ΋͠ɺυϝΠϯαʔϏεͰ΋RepositoryʹΞΫηεͨ͠ ͍৔߹͸ίωΫγϣϯΛ౉͞ͳ͚Ε͹͍͚ͳ͍͕ɺ͜Ε ͸υϝΠϯͷؔ৺Ͱ͸ͳ͍఺ʹ્·ΕΔ • implicitͰݱΕΔ෼ʹ͸ڐ༰͢Δʁ • ϨΠϠεʔύʔλΠϓʢجఈΫϥεʣʹӅṭ͢Δʁ

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Ϣʔεέʔεۦಈ։ൃʹ ग़ձͬͨ࿩ ઃܭͷલʹ༧උઃܭΛͯ͠ ᐆດੑΛഉআ͢Δ

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͍͟DDDΛ࣮ફ͠Α͏ͱ͢Δͱ • Կ͔Β࢝Ίͯྑ͍͔෼͔Βͳ͍ • υϝΠϯΤΩεύʔτͱͲ͏࿩ͤ͹ྑ͍͔෼͔Βͳ͍ • UIແ͠ͰυϝΠϯ͚ͩΛ࿩ͯ͠΋্ख͘఻ΘΒͳ͍ • ࠷ॳ͔ΒৄࡉͳΫϥεਤΛॻ͜͏ͱͯ͠͠·͏ • ࢼ͠ʹϞσϧ͚ͩͰ΋ॻ͍ͯΈΔͱࢥ͍ͷ֎ϘϦϡʔϛΟ • υϝΠϯϞσϧʢΫϥεਤʣ͔Β࢓༷ΛಡΈऔΔͷ͕ࠔ೉ • ૝૾ͯ͠ಡΈऔΖ͏ͱ͢Δͱᐆດ͞ʹ௚໘͢Δ ㅟ ㅟ ㅟ ※ฐࣾࣄྫ͚ͩͰͳ͘ໝ૝΋ؚ·Ε·͢

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υϝΠϯϞσϧ͚ͩʹ ண໨͍ͯ͠Δͱ ྲྀΕ͕Θ͔Βͳ͘ͳΔ

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IUUQCMPHUIMJHIUDPNVODMFCPC UIFDMFBOBSDIJUFDUVSFIUNM ͲͪΒ΋Ϗδωεϧʔϧ 6TF$BTF͸ ΞϓϦέʔγϣϯݻ༗ͷ Ϗδωεϧʔϧ

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Ϣʔεέʔεʢ΍ετʔϦʔʣ ʹΑͬͯυϝΠϯϞσϧ͸ ࢖ΘΕΔ

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ϑ Υ ϩ ʔ

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Ϣʔεέʔε೉ຽ

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ॻ੶ ʮϢʔεέʔεۦಈ։ൃ࣮ફΨΠυʯ • Use Case Driven Object Modeling with UML • ICONIXϓϩηεͷղઆຊ • ඇৗʹܰշͳޠΓޱʢ͏ͻΌʔͱ͔ग़ͯ͘Δʣ • एׯXP൱ఆʢߟ͑ࣗମ͸XPΑΓલ͔Β͋Δʣ • ͍͖ͳΓઃܭʹೖΔͷͰ͸ͳͯ͘ɺ·ͣ͸෼ੳΛͪΌΜͱ͠Α͏ɻ • ಛʹʮՄೳͳݶΓ؆୯ʹ(DTSTTCPW)ʯͱʮͦΜͳ΋ͷ͸ඞཁͳ͍ (YAGNI)ʯΛཧ༝ʹ୅ସίʔεʢΤϥʔέʔεʣΛߟྀʹؚΊͳ͍ ͜ͱ͸ഁ໓΁ͷಓͱ͍ͯ͠Δɻ

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·࣮ͩફஈ֊Ͱ͸ͳ͍ͷͰ ࠓճ͸঺հ͚ͩɾɾɾ

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ICONIXϓϩηε͕໨ࢦ͢τίϩ • ᐆດ͞Λഉআ͢Δ͜ͱ͕ୈҰ • Ͳ͔ͪΒͱ͍͏ͱυΩϡϝϯτେࣄ࿦ௐ • ͱݴͬͯ΋ɺʢίʔυϑΝʔετͰ͸ͳ͍ͩ ͚Ͱʣ໨తΛୡ੒͢Δ͜ͱʹ஫ྗͯ͠ɺମࡋ ΍༨෼ͳ΋ͷΛ࡟͗མͱͨܰ͠ྔͳυΩϡ ϝϯτΛਪ঑͍ͯ͠Δɻ

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ICONIXϓϩηε͸DDDͷ࣮ફ ࣮͸͔͜͜Β ࢝·Δ υϝΠϯϞσϧΛҭͯΔͨΊʹɺ ϢʔεέʔεΛ࢖ͬͯۦಈ͍ͯ͠Δ ϢʔεέʔεϞσϧ͸ ίϯςΩετͷൃݟʹ ΋໾ཱͭ ಈతͳϫʔΫϑϩʔͱ ੩తͳϫʔΫϑϩʔ͕ ͋Δ ϩόετωε෼ੳ౳Λ͠ͳ͕Β υϝΠϯϞσϧΛߋ৽

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DDDͰ͍͏࣮ફతϞσϥ ΛϓϩηεԽͨ͠΋ͷ͕ICONIX ʢͱߟ͑Δͱ෼͔Γ΍͍͢ʣ

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–ʮϢʔεέʔεۦಈ։ൃ࣮ફΨΠυʯ1ষத “௨ৗɺԿΒ͔ͷઃܭ࡞ۀΛߦΘͳ͍ݶ Γɺࣗ෼͕औΓѻ͏ཁٻΛਖ਼͘͠ཧղ͢ Δ͜ͱ͸Ͱ͖ͳ͍ɻ”

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શͯͷϢʔεέʔεΛ෼ੳ͠ͳ ͚Ε͹͍͚ͳ͍ʁ • ͍͖ͳΓશͯͷϢʔεέʔεΛ෼ੳ͢Δඞཁ͸ ͳ͍ɻICONIXϓϩηε͸1ͭͷϢʔεέʔε ͕͋Ε͹ۦಈͤ͞Δ͜ͱ͕Ͱ͖Δɻͱ͸͍ ͑ɺͨͬͨ̍ͭͷখ͞ͳϢʔεέʔεͰࡁΉι ϑτ΢ΣΞͷํ͕ك • Ͳ͏΍ͬͯείʔϓΛߜ͍͔ͬͯ͘ʹͭ ͍ͯ͸ɺϢʔβʔετʔϦʔϚοϐϯά ͕ࢀߟʹͳΓ·͢ɻ

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Clean Architectureͱͷ਌࿨ੑ • "UseCase૚"ͱͦͷ·Μ·ͷ૚͕͋ΔͷͰؔ܎͕෼͔Γ΍͍͢ʢ"ΞϓϦέʔ γϣϯαʔϏε"ͱ͍͏ݴ༿ΑΓ͸ྑ͍ͱࢥ͏ɻϢʔεέʔεͱ͍͏ݴ༿Ͱͳ͍ ͷ͸ɺʢICONIXͳͲΛ࢖Θͳ͍ͱʣৄࡉͳٕज़ཁૉΛೖΕͯ͠·͍΍͍͔͢Β Ͱ͸ʁʣ • ۩ମతͳϑϨʔϜϫʔΫ΍DB͕ܾ·͍ͬͯͳͯ͘΋։ൃΛਐΊΔ͜ͱ͕Ͱ͖Δ • ICONIXϓϩηε͸UseCase૚ͱDomain૚ͷؔ৺ࣄʹ͍ͭͯѻ͏ • Clean Architecture͸ΞϓϦέʔγϣϯʢUseCase&DomainʣͱΠϯϑϥΛ ෼཭͢Δ • Hexagonal΍OnionͰ΋ಉ༷

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ద༻΁ͷߟ࡯̍ ਖ਼ࣜͳυΩϡϝϯτʹ͠ͳ͍ • ސ٬ͱʮԿΛͭ͘Δͷ͔ʯΛᐆດ͞Λղফͯ͠߹ҙ͢Δ͜ͱ͕େࣄ • ICONIXϓϩηεͰ͸ʮ࡞੒͢ΔυΩϡϝϯτ͸͜ΕͰɺͦΕΛϨ Ϗϡʔ͢Δػձ͸͍ͭʯΛ໌֬ʹఆ͍ٛͯ͠Δɻ • ਖ਼֬ʹॻ͘͜ͱ͸ਪ঑͍ͯ͠ͳ͍ʢॏްͳυΩϡϝϯτ͸଍ ᐫʣɻUML࢓༷ʹ४ڌ͢Δඞཁ͸ͳ͍ɻۃ୺ͳ࿩ɺϗϫΠτ Ϙʔυͷམॻ͖Ͱ΋ྑ͍ʢͱࢥ͏ʣɻ • ॻ੶தͰ͸πʔϧΛ࢖͏͜ͱΛલఏʹɺίʔυͱઃܭΛಉظ͢ Δ͜ͱ͸ڧ͘ਪ঑͞Ε͍ͯΔɻࢴͱԖච͕Ұ൪ڧ͍͔΋͠Εͳ ͍ɻʮΊ΋Ͱ͘͢ʯͱ͔ࢼͯ͠Έ͍ͨɻ

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ద༻΁ͷߟ࡯̎ ੔߹ੑཁٻͷݕ౼ • ސ٬͕ࢀՃ͢ΔϨϏϡʔ͸༧උઃܭϨϏϡʔ·ͰʢγʔέϯεਤҎ ߱͸ٕज़త͗͢ΔʣɻؾΛ͚ͭͳ͍ͱϩόετωε෼ੳͷஈ֊Ͱ ͸੔߹ੑཁٻͷදݱ·Ͱٴ͹ͳ͍ؾ͕͢Δɻ • શͯʹτϥϯβΫγϣϯ͕ඞཁͱ͸ݶΒͣɺ݁Ռ੔߹ੑͰे෼ ͳέʔε΋ଟ͍͸ͣɻ • ༧උઃܭϨϏϡʔͷஈ֊·Ͱʹ੔߹ੑͷཁٻʢϨϕϧʣʹ͍ͭ ͯݕ౼ͨ͠ํ͕ྑ͍ͱࢥ͏ɻ • "τϥϯβΫγϣϯͷ෼ੳΛ͔ͯ͠ΒͰͳ͍ͱɺू໿ͷઃܭͷྑ ͠ѱ͠Λਖ਼͘͠൑அ͢Δ͜ͱ͸Ͱ͖ͳ͍"ʢIDDD p.340-344ʣ

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։ൃϓϩηεͷ มߋ͸೉͍͠ɾɾɾ νʔϜͷܾ·Γʁ ձࣾͰنఆ͞Ε͍ͯΔʁ ސ٬͔Βࢦఆ͞Ε͍ͯΔʁ

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–Team Geek ʮ5.6 ر๬͸࢒͞Ε͍ͯΔʯΑΓ “࠷ॳʹ΍Βͳ͚Ε͹͍͚ͳ͍ͷ͸ɺ࢓ࣄ Λୡ੒͢ΔͨΊʹԿ͔Λม͑Δ͜ͱͩɻ”

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ͦΕͰ΋ਏ͘ͳͬͨΒɾɾɾ

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XXXXBOUFEMZDPNQSPKFDUT ΠϠʔ΢ϚΫπφΨολφʔ

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·ͱΊ • DDD  + Clean Architecture  + Use Case Driven Object Modeling(ICONIX)  ͷηοτ͸૬ੑ͕ྑͦ͞͏ • ICONIX͸ܰྔͱ͸͍͑ɺͦͷதͰ΋Ͳ͜·ͰΛ࣮ࢪ͢Δ͔ ސ٬΍νʔϜͱςʔϥϦϯάͨ͠ํ͕ྑ͍͔΋ • ֖Λ։͚Ε͹஌͍ͬͯΔਓʹ͸౰ͨΓલ…  ૣ͘஌Γ͔ͨͬͨ  ʢଞͷ࣮ફख๏΋͝ଘ஌ͷํ͕͍Βͬ͠ΌΕ͹ޙͰڭ͍͑ͯͩ͘͞ʣ

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Q & A

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ࢀߟɿDDDฤ • ॻ੶ʮΤϦοΫɾΤϰΝϯεͷυϝΠϯۦಈઃܭʯʢᠳӭࣾʣ • ॻ੶ʮ࣮ફυϝΠϯۦಈઃܭʯʢᠳӭࣾʣ • ਿຊ ܒ ࢯʮυϝΠϯۦಈઃܭ at DDD.rb #5ʯ • ਿຊ ܒ ࢯʮ2ͭͷυϝΠϯϞσϧʕDDDͷؚҙʯ • ૿ా ږ ࢯʮ3ि࿈ଓDDDͦͷ1 υϝΠϯۦಈઃܭͷجຊΛཧղ͢Δʯ • ૿ా ږ ࢯʮ3ि࿈ଓDDDͦͷ2 ਂ͍Ϟσϧͷ୳ٻ(υϝΠϯۦಈઃܭ ୈ̏෦) ʯ • ૿ా ږ ࢯʮ3ि࿈ଓDDDͦͷ3 υϝΠϯۦಈઃܭ ઓུతઃܭ ʯ • InfoQʮυϝΠϯۦಈઃܭɾ։ൃͷ࣮ફʯ • InfoQʮίϯςΩετϚοϐϯάʹΑΔઓུతυϝΠϯۦಈઃܭʯ • InfoQʮShane HastieࢯɺϏδωε՝୊ʹର͢ΔΞδϟΠϧϚΠϯυηοτͷద༻ʹ͍ͭͯޠΔʯ

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ࢀߟɿClean Architectureฤ • ετϥςδοΫνϣΠεʮϨΠϠʔυΞʔΩςΫνϟʯ • Alistair Cockburn ࢯʮHexagonal Architectureʯʢ຋༁ɿ෢౻ ࢯʣ • Jeffrey Palermo ࢯʮThe Onion Architectureʯ • Robert Martin ࢯʮThe Clean Architectureʯʢ຋༁ɿ෢౻ ࢯʣ • Thomas PIERRAIN ࢯʮA zoom on the hexagonal/clean/onion architectureʯ • InfoQʮυϝΠϯۦಈઃܭͱΦχΦϯΞʔΩςΫνϟʯ • InfoQʮΞʔΩςΫνϟͷ໨త͸ҙਤͰ͋ΓɺϑϨʔϜϫʔΫͰ͸ͳ͍ʯ • James Coglan ࢯʮ໋ྩܕͷίʔϧόοΫɺؔ਺ܕͷϓϩϛε: Node ͕ҳͨ͠࠷େͷػձʯ(຋༁ɿԬຊ ࢯ) • Togetter·ͱΊʮ”໋ྩܕͷίʔϧόοΫɺؔ਺ܕͷϓϩϛε”΁ͷ൓Ԡʢͱͦͷޙʣʯ • _kondeiࢯʮ࣋ଓՄೳͳ։ൃΛ໨ࢦ͢ ~ υϝΠϯɾϢʔεέʔεۦಈʢΫϦʔϯΞʔΩςΫνϟʣ + ୯ํ޲ʹ੍ݶͨ͠ॲཧ + FRPʯ • ૿ా ږ ࢯʮυϝΠϯϞσϧத৺ͷΞʔΩςΫνϟʯ

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ࢀߟɿϢʔεέʔεۦಈ։ൃฤ • ॻ੶ʮϢʔεέʔεۦಈ։ൃ࣮ફΨΠυʯʢᠳӭࣾʣ • ॻ੶ʮΤΫετϦʔϜϓϩάϥϛϯάୈ2൛৽༁ʯʢΦʔϜࣾʣ • ॻ੶ʮϢʔβʔετʔϦʔϚοϐϯάʯʢΦϥΠϦʔδϟύϯʣ • ૿ా ږ ࢯʮ࣮ફ ICONIXϓϩηεɿγʔέϯεਤͱΫϥεਤʯ • ૿ా ږ ࢯʮ࣮ફ ICONIXϓϩηεɿυϝΠϯۦಈʯ • WikipediaʮICONIXϓϩηεʯ • EZʮϏδωεཁٻͷٸܹͳมԽʹରԠ͢Δ։ൃϓϩηεͱ͸ʁʯ