実践GraphQL on Scala/Real world GraphQL on Scala

Scala関西サミット2018 「実践GraphQL on Scala」の発表資料

- https://github.com/petitviolet/graphql_on_scala

Transcript

1. ࣮ફ(SBQI2-
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7. ࠓ೔࿩͢͜ͱ w (SBQI2-ͱ͸
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   https://en.wikipedia.org/wiki/GraphQL
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14. (SBQI2-ͱ͸ 14 https://gql.foundation/
15. (SBQI2-ΩςΔ 15
16. (SBQI2-ͱ͸ w ܕγεςϜΛఏڙ͍ͯ͠Δ
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21. ஫ҙ఺ w (SBQI2-͸ศར͕ͩɺۜͷ஄ؙͰ͸ͳ͍
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25. OVMMBCMFOPOOVMM
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26. ࣮ફʁ 26
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28. ͳͥ(SBQI2-Λ࠾༻ͨ͠ͷ͔ w ؅ཧը໘࡞Δ͚ͲɺͲ͏΍ͬͯ࡞Δʁ
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30. 3&45GVM
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    w ΫΤϦͷ੹຿ΛΫϥΠΞϯτ ʹدͤΔ͜ͱ͕ग़དྷΔ w ஌ݟࣄྫ͕ཷ·͍ͬͯͳ͍
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31. 3&45GVM
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    w ϦΫΤετΛ࠷దԽग़དྷΔ
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32. ͳͥ(SBQI2-Λ࠾༻ͨ͠ͷ͔ w ͋ͱ͸λΠϛϯά
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33. (SBQI2-Λ࠾༻ͯ͠Ͳ͏ʁ w "1*ઃܭͰ೰Ή͜ͱ͕গͳͯ͘޾ͤ
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34. 4DBMBͰͷ(SBQI2- 34
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36. implicit val userType: ObjectType[Ctx, User] = ObjectType(name = "User", fields = fields[Ctx, User]( Field("id", IDType, resolve = { ctx => ctx.value.id }), Field("name", StringType, resolve = { ctx: Context[Ctx, User] => ctx.value.name }), Field("status", userStatusType, resolve = { ctx => ctx.value.status }), Field("projects", ListType(projectType), resolve = { ctx => ProjectResolver.byUser(ctx.value) }) ) ) 0CKFDU5ZQF type User { id: ID! name: String! status: UserStatus! projects: [Project!]! } 36 (SBQI2-ͷܕఆٛ 4BOHSJBͰͷఆٛ
37. type User { id: ID! name: String! status: UserStatus! projects: [Project!]! } implicit val userType: ObjectType[Ctx, User] = ObjectType(name = "User", fields = fields[Ctx, User]( Field("id", IDType, resolve = { ctx => ctx.value.id }), Field("name", StringType, resolve = { ctx: Context[Ctx, User] => ctx.value.name }), Field("status", userStatusType, resolve = { ctx => ctx.value.status }), Field("projects", ListType(projectType), resolve = { ctx => ProjectResolver.byUser(ctx.value) }) ) ) 0CKFDU5ZQF 37
38. type User { id: ID! name: String! status: UserStatus! projects: [Project!]! } implicit val userType: ObjectType[Ctx, User] = ObjectType(name = "User", fields = fields[Ctx, User]( Field("id", IDType, resolve = { ctx => ctx.value.id }), Field("name", StringType, resolve = { ctx: Context[Ctx, User] => ctx.value.name }), Field("status", userStatusType, resolve = { ctx => ctx.value.status }), Field("projects", ListType(projectType), resolve = { ctx => ProjectResolver.byUser(ctx.value) }) ) ) 0CKFDU5ZQF 38 0CKFDU5ZQFʹ
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39. type User { id: ID! name: String! status: UserStatus! projects: [Project!]! } implicit val userType: ObjectType[Ctx, User] = ObjectType(name = "User", fields = fields[Ctx, User]( Field("id", IDType, resolve = { ctx => ctx.value.id }), Field("name", StringType, resolve = { ctx: Context[Ctx, User] => ctx.value.name }), Field("status", userStatusType, resolve = { ctx => ctx.value.status }), Field("projects", ListType(projectType), resolve = { ctx => ProjectResolver.byUser(ctx.value) }) ) ) 0CKFDU5ZQF 39 $POUFYU ޙड़
40. type User { id: ID! name: String! status: UserStatus! projects: [Project!]! } implicit val userType: ObjectType[Ctx, User] = ObjectType(name = "User", fields = fields[Ctx, User]( Field("id", IDType, resolve = { ctx => ctx.value.id }), Field("name", StringType, resolve = { ctx: Context[Ctx, User] => ctx.value.name }), Field("status", userStatusType, resolve = { ctx => ctx.value.status }), Field("projects", ListType(projectType), resolve = { ctx => ProjectResolver.byUser(ctx.value) }) ) ) 0CKFDU5ZQF 40 ϑΟʔϧυఆٛ
41. type User { id: ID! name: String! status: UserStatus! projects: [Project!]! } implicit val userType: ObjectType[Ctx, User] = ObjectType(name = "User", fields = fields[Ctx, User]( Field("id", IDType, resolve = { ctx => ctx.value.id }), Field("name", StringType, resolve = { ctx: Context[Ctx, User] => ctx.value.name }), Field("status", userStatusType, resolve = { ctx => ctx.value.status }), Field("projects", ListType(projectType), resolve = { ctx => ProjectResolver.byUser(ctx.value) }) ) ) 0CKFDU5ZQF 41 AOBNFAϑΟʔϧυ
42. type User { id: ID! name: String! status: UserStatus! projects: [Project!]! } implicit val userType: ObjectType[Ctx, User] = ObjectType(name = "User", fields = fields[Ctx, User]( Field("id", IDType, resolve = { ctx => ctx.value.id }), Field("name", StringType, resolve = { ctx: Context[Ctx, User] => ctx.value.name }), Field("status", userStatusType, resolve = { ctx => ctx.value.status }), Field("projects", ListType(projectType), resolve = { ctx => ProjectResolver.byUser(ctx.value) }) ) ) 0CKFDU5ZQF 42 SFTPMWFؔ਺ͷ$POUFYUʹ͸
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43. type User { id: ID! name: String! status: UserStatus! projects: [Project!]! } implicit val userType: ObjectType[Ctx, User] = ObjectType(name = "User", fields = fields[Ctx, User]( Field("id", IDType, resolve = { ctx => ctx.value.id }), Field("name", StringType, resolve = { ctx: Context[Ctx, User] => ctx.value.name }), Field("status", userStatusType, resolve = { ctx => ctx.value.status }), Field("projects", ListType(projectType), resolve = { ctx => ProjectResolver.byUser(ctx.value) }) ) ) 0CKFDU5ZQF 43 $POUFYUWBMVFͰ6TFSܕͷ
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44. implicit val userType: ObjectType[Ctx, User] = ObjectType(name = "User", fields = fields[Ctx, User]( Field("id", IDType, resolve = { ctx => ctx.value.id }), Field("name", StringType, resolve = { ctx: Context[Ctx, User] => ctx.value.name }), Field("status", userStatusType, resolve = { ctx => ctx.value.status }), Field("projects", ListType(projectType), resolve = { ctx => ProjectResolver.byUser(ctx.value) }) ) ) type User { id: ID! name: String! status: UserStatus! projects: [Project!]! } 0CKFDU5ZQF 44 <">Λ-JTU5ZQF "5ZQF Ͱදݱ OPOOVMMͳ1SPKFDUͷ
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45. implicit val userType: ObjectType[Ctx, User] = ObjectType(name = "User", fields = fields[Ctx, User]( Field("id", IDType, resolve = { ctx => ctx.value.id }), Field("name", StringType, resolve = { ctx: Context[Ctx, User] => ctx.value.name }), Field("status", userStatusType, resolve = { ctx => ctx.value.status }), Field("projects", ListType(projectType), resolve = { ctx => ProjectResolver.byUser(ctx.value) }) ) ) type User { id: ID! name: String! status: UserStatus! projects: [Project!]! } 0CKFDU5ZQF 45 SFTPMWFؔ਺ͷதͰ%#ΞΫηεͳͲͯ͠
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46. implicit val userType: ObjectType[Ctx, User] = ObjectType(name = "User", fields = fields[Ctx, User]( Field("id", IDType, resolve = { ctx => ctx.value.id }), Field("name", StringType, resolve = { ctx: Context[Ctx, User] => ctx.value.name }), Field("status", userStatusType, resolve = { ctx => ctx.value.status }), Field("projects", ListType(projectType), resolve = { ctx => ProjectResolver.byUser(ctx.value) }) ) ) 0CKFDU5ZQF 46 6TFSOBNFΛऔಘ͢Δ2VFSZΛॻ͘ͱɺ
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47. implicit val userType: ObjectType[Ctx, User] = ObjectType(name = "User", fields = fields[Ctx, User]( Field("id", IDType, resolve = { ctx => ctx.value.id }), Field("name", StringType, resolve = { ctx: Context[Ctx, User] => ctx.value.name }), Field("status", userStatusType, resolve = { ctx => ctx.value.status }), Field("projects", ListType(projectType), resolve = { ctx => ProjectResolver.byUser(ctx.value) }) ) ) 0CKFDU5ZQF 47 %#ΞΫηε͕ඞཁʹͳΔϑΟʔϧυ͕͋ͬͯ΋
    ͦͷϑΟʔϧυΛऔಘ͠ͳ͍ͳΒSFTPMWFؔ਺͕࣮ߦ͞ Εͣ%#ΞΫηε΋ൃੜ͠ͳ͍
48. 0CKFDU5ZQF w ఆ͕ٛΊΜͲ͍͘͞ʁ 48 implicit val userType: ObjectType[Ctx, User] = ObjectType(name = "User", fields = fields[Ctx, User]( Field("id", IDType, resolve = { ctx => ctx.value.id }), Field("name", StringType, resolve = { ctx: Context[Ctx, User] => ctx.value.name }), Field("status", userStatusType, resolve = { ctx => ctx.value.status }), Field("projects", ListType(projectType), resolve = { ctx => ProjectResolver.byUser(ctx.value) }) ) )
49. 0CKFDU5ZQF w ͦ͜ͰϚΫϩ
    w DBTF
    DMBTTͳΒ͍͍ײ͡ʹղܾͯ͘͠ΕΔ
    w ґଘ͢Δଞͷಠࣗܕ͸JNQMJDJUͰએݴ͓ͯ͘͜͠ͱ
    w ࠓճͳΒQSPKFDU5ZQFͱ͔ import sangria.macros.derive val userType: ObjectType[Ctx, User] = derive.deriveObjectType() 49
50. &OVN5ZQF val userStatusType = EnumType[UserStatus]( "UserStatus", values = List( EnumValue[UserStatus]("Active", value = UserStatus.Active), EnumValue[UserStatus]("Paused", value = UserStatus.Paused) ) ) enum UserStatus { Active Paused } sealed abstract class UserStatus(val value: Int) object UserStatus { case object Active extends UserStatus(1) case object Paused extends UserStatus(2) } 50
51. &OVN5ZQF΋ϚΫϩͰ val userStatusType: EnumType[UserStatus] = derive.deriveEnumType[UserStatus]() enum UserStatus { Active Paused } sealed abstract class UserStatus(val value: Int) object UserStatus { case object Active extends UserStatus(1) case object Paused extends UserStatus(2) } 51
52. w &OVN5ZQF΋ϚΫϩͰಋग़Ͱ͖Δ
    w ATFBMFEAͱAPCKFDUAͷ૊Έ߹Θͤ &OVN5ZQF΋ϚΫϩͰ val userStatusType: EnumType[UserStatus] = derive.deriveEnumType[UserStatus]() sealed abstract class UserStatus(val value: Int) object UserStatus { case object Active extends UserStatus(1) case object Paused extends UserStatus(2) } 52
53. w ީิʹͳΔܕ 0CKFDU5ZQF Λ-JTUͰ༩͑Δ 6OJPO
    5ZQF union Plan = Free | Standard | Enterprise object Plan { case class Free(startDate: ZonedDateTime) case class Standard(startDate: ZonedDateTime) case class Enterprise(userLimit: Int, startDate: ZonedDateTime) } implicit val planType: UnionType[Ctx] = { val free = derive.deriveObjectType[Ctx, Plan.Free]() val standard = derive.deriveObjectType[Ctx, Plan.Standard]() val enterprise = derive.deriveObjectType[Ctx, Plan.Enterprise]() UnionType("Plan", types = free :: standard :: enterprise :: Nil) } 53
54. w ೖྗ஋ͱͯ͠+40/Λड͚औΔͨΊͷ΍ͭ
    w +40/Ͱड͚औͬͯ4DBMBͷΦϒδΣΫτʹม׵ *OQVU0CKFDU5ZQF mutation { UpdateTask(attributes: { taskId: "t1", taskName: "newName" }) { id } } case class UpdateTaskParam(taskId: String, taskName: Option[String], taskDescription: Option[String], assignedTo: Option[String]) 54
55. w ͍ͭ͜΋ϚΫϩͰࣗಈಋग़ग़དྷΔ *OQVU0CKFDU5ZQF case class UpdateTaskParam(taskId: String, taskName: Option[String], taskDescription: Option[String], assignedTo: Option[String]) 55 implicit val paramJson = jsonFormat4(UpdateTaskParam.apply) val param = derive.deriveInputObjectType[UpdateTaskParam]() mutation { UpdateTask(attributes: { taskId: "t1", taskName: "newName" }) { id } }
56. w &YFDVUPSʹεΩʔϚɺ࣮ߦ͍ͨ͠ΫΤϦɺ$POUFYU ͳͲΛ༩͑Δͱ+40/Λฦͯ͘͠ΕΔ (SBQI2-ͷ࣮ߦ val result: Future[JsValue] = Executor.execute[Ctx, Unit, JsObject]( schema, document, context ) 56 w ఆٛͨ͠(SBQI2-εΩʔϚ
    w ϦΫΤετͷ+40/Λύʔεͨ݁͠Ռ
    w ࣮ߦ͢ΔͨΊͷDPOUFYU
57. 4DBMBͰͷ(SBQI2- w 4DBMBͱ૬ੑόπάϯ
    w ڧྗͳܕγεςϜͰ(SBQI2-ͷܕΛදݱ
    w ϚΫϩͰϘΠϥʔϓϨʔτ΋࡟ݮ
    w σϑΥϧτOPOOVMM࠷ߴ
    w 0QUJPOΛ͚ͭͳ͍ͱOVMMBCMFʹͳΒͳ͍
    w +40/ͱͷ૬ޓม׵
    w DBTF
    DMBTT͕͋ΔͷͰࣗಈಋग़Ͱ͖Δ
    w TBOHSJBͷ͓͔͛Ͱे෼ઓ͑Δ 57
58. (SBQI2-ͷ࣮ફ 58
59. (SBQI2-Ͱͷ࣮ફฤ w (SBQI2-Λ4DBMB4BOHSJBͰͲ͏࣮૷͍ͯ͠Δ͔
    w ͋͘·Ͱ͜͏΍࣮ͬͯફ͍ͯ͠Δɺͱ͍͏࿩
    w ͍Ζ͍Ζ೰ΈϙΠϯτ΋ଟ͍
    w (SBQI2-ͳΒͰ͸ͷ೰Έ΋͋Δ
    w খ͍͞΋ͷ͔Βେ͖͍΋ͷ·Ͱ͍Ζ͍Ζ 59
60. (SBQI2-Ͱͷ࣮ફฤ w ΞʔΩςΫνϟ
    w εΩʔϚͷઃܭ
    w $POUFYUΛͲ͏͢Δ͔
    w ೝূɺೝՄΛͲ͏͢Δ͔
    w τϥϯβΫγϣϯ
    w ΤϥʔϋϯυϦϯά
    w / ໰୊
    w FUD 60
61. ΞʔΩςΫνϟ 61
62. ΞʔΩςΫνϟ w ϓϩάϥϛϯάϨϕϧͰͷઃܭ
    w (SBQI2-ʹͲ͜·Ͱ੹຿Λ೚ͤΔ͔
    w ͲΜͳײ͡Ͱ࡞Δͷ͕͍͍ͷ͔ 62
63. ΞʔΩςΫνϟ HTTP GraphQL Business Logic Database Access 63
64. w (SBQI2-͸)551ϨΠϠͱϏδωεϩδοΫͷؒ ΛऔΓ࣋ͭଘࡏͱͯ͠ઃܭ͢Δͷ͕ྑ͍
    w (SBQI2-͸͋͘·Ͱ*'ͱͯ͠ར༻͢Δ ΞʔΩςΫνϟ HTTP GraphQL Business Logic Database Access 64
65. w (SBQI2-࡞ऀͷ-FF
    #ZSPOࢯ΋ݴ͍ͬͯΔ
    w ೝূೝՄɺΩϟογϡ΍%#ΫΤϦͳͲ͸ (SBQI2-ϨΠϠͰ͸ͳͦ͘ͷԼͰ΍Δ΂͖
    w ަ׵Մೳੑ্͕͕ͬͯকདྷ໾ʹཱͭ ΞʔΩςΫνϟ 65 https://www.youtube.com/watch?v=zVNrqo9XGOs
66. w (SBQI2-ͷར఺͸2VFSZʹ͋ΒΘΕΔ
    w ΫϥΠΞϯτͷཁٻʹԠ͑Δॊೈͳ2VFSZ
    w .VUBUJPO͸ਖ਼௚ͦ͜·Ͱʜ ΞʔΩςΫνϟ 66
67. w $234
    w $PNNBOE2VFSZ
    3FTQPOTJCJMJUZ
    4FHSFHBUJPO ΞʔΩςΫνϟ 67 https://docs.microsoft.com/ja-jp/azure/architecture/guide/architecture-styles/cqrs
68. ΞʔΩςΫνϟ HTTP GraphQL Business Logic Database Access 68
69. ΞʔΩςΫνϟ 69 HTTP GraphQL UseCase/Application Database Access(DAO) Query Mutation Domain 3FQPTJUPSZ Resolver
70. w $234Λ؆ུԽͯ͠࠾༻͍ͯ͠Δ
    w ߋ৽ܥ͸%%%Ͱ͖ͬͪΓϞσϦϯά࣮૷
    w ࢀরܥ͸TFMFDUͨ͠σʔλΛՃ޻͢Δ͚ͩ
    w (SBQI2-ͷ2VFSZ͸ͲΜͳσʔλΛඞཁͱ͞ΕΔ ͔ɺݺͼग़͞ΕΔ·ͰΘ͔Βͳ͍
    w %%%
    3FQPTJUPSZ͸ݫ͍͠
    w ఘΊ΋େࣄ
    w %BUB"DDFTT0CKFDUΛ࢖͏ ΞʔΩςΫνϟ 70
71. w ͱ͸͍͑2VFSZܥͷSFTPMWFͰ%"0Λ௚઀ݺͿͱɺ %"0 ЋͳॲཧΛͨ͘͠ͳͬͨ࣌ʹࠔΔ
    w ΩϟογϡೖΕͨΓϖʔδωʔγϣϯͨ͠Γ
    w 3FTPMWFS૚Λ༻ҙ͓ͯ͘͠ͱྑ͍
    w ಺෦Ͱ͸%"0 Ћఔ౓
    w SFTPMWFؔ਺͔Β࢖ΘΕΔ ΞʔΩςΫνϟ 71
72. w 3FTPMWFSͷ࣮૷ྫ ΞʔΩςΫνϟ 72 Field("users", ListType(userType), resolve = { ctx => UserResolver.all()(ctx.ctx) }) object UserResolver { def all()(implicit ctx: GraphQLContext): Future[Seq[User]] = { withCache("user#all") { UserDao.findAll() } } }
73. εΩʔϚ 73
74. εΩʔϚ w ΫϥΠΞϯτʹͲΜͳεΩʔϚΛఏڙ͢Δ͔
    w 3&45GVMͳ"1*ʹ͓͚Δ63-ઃܭʹ͍ۙ
    w ·͞ʹϦιʔεઃܭ
    w εΩʔϚͷେ͖ͳ෼͚ํ
    w ࢀরܥ͸2VFSZ
    w ߋ৽ܥ͸.VUBUJPO 74
75. εΩʔϚ 2VFSZ w SPPUϨϕϧ͸ඇৗʹॏཁ
    w ʮ(SBQI2-͸ΫϥΠΞϯτ͕ඞཁͳσʔλ͚ͩ Λબ୒ͯ͠औಘ͢Δ͜ͱ͕ग़དྷΔʯͷى఺
    w ͔͜͜Βؔ࿈Λ୧͍ͬͯ͘͜ͱʹͳΔ type Query { projects: [Project!]! tasks(status: TaskStatus): [Task!]! users(arg: UserSearchCondition): [User!]! } 75
76. εΩʔϚ 2VFSZ w AWJFXFSA
    w ϦΫΤετ͖ͯͨ͠Ϣʔβࣗ਎ʹඥͮ͘৘ใ
    w ࣗ෼ࣗ਎ΛOPOOVMMͰఏڙͨ͠Γ type Query { projects: [Project!]! tasks: [Task!]! users: [User!]! viewer: ViewerQuery! } type ViewerQuery { self: User! assignedTasks: [Task!]! belongsTo: [Project!]! } 76
77. εΩʔϚ 2VFSZ w AWJFXFSA
    w ϦΫΤετ͖ͯͨ͠Ϣʔβࣗ਎ʹඥͮ͘৘ใ
    w ࣗ෼ࣗ਎ΛOPOOVMMͰఏڙͨ͠Γ
    w (JUIVC
    WΛύΫΔ 77
78. εΩʔϚ .VUBUJPO w શͯSPPUϨϕϧʹฒ΂Δͷ͕Φεεϝ
    w ωετͨ͠.VUBUJPO͸࣮ߦॱং͕อূ͞Εͳ͍ mutation { CreateTask(…) { id } UpdateTask(…) { id } // CreateTaskͷޙʹ࣮ߦ͞ΕΔ } mutation { Task { Create(…) { id } Update(…) { id } // Createͷޙʹ࣮ߦ͞ΕΔอূ͸ͳ͍ } } 78
79. εΩʔϚ .VUBUJPO w "SHVNFOUͱ*OQVU0CKFDU5ZQF͸͓޷ΈͰྑͦ͞͏
    w 63-ύϥϝʔλ
    PS
    +40/ͷΠϝʔδ
    w *OQVU0CKFDU5ZQF͸DBTF
    DMBTTʹύʔεग़དྷͯศར 79 *OQVU0CKFDU5ZQF "SHVNFOU
80. όʔδϣχϯά 80
81. όʔδϣχϯά w Α͋͘Δޡղ
    w ʮ(SBQI2-ͩͱόʔδϣχϯά͠ͳͯ͘Α͍ʯ 81
82. όʔδϣχϯά w "1*ͷύεͱͯ͠όʔδϣχϯά͸ෆཁ
    w WHSBQIRM
    w WHSBQIRM 82 "
83. όʔδϣχϯά w εΩʔϚͷόʔδϣχϯά͸ඞཁ
    w ϑΟʔϧυͷ௥ՃͷΈɺͩͱෆཁ
    w มߋ͸!EFQFSFDBUFE͚ͭͯɺมߋޙͷϑΟʔϧ υผ໊Ͱ௥Ճɺ͠͹Βͨ͘͠ΒมߋલͷΛফ͢
    w ࡟আ͸!EFQFSFDBUFE͚ͭͯ͠͹Βͨ͘͠Βফ͢
    w %#ͷεΩʔϚͱಉ͡Α͏ͳϑϩʔ
    w ϑΟʔϧυ໊͸ඇৗʹॏཁ
    w มߋͮ͠Β͍ɺͱ͍͏ͷΛ೦಄ʹஔ͍͓ͯ͘ 83
84. όʔδϣχϯά w 'JFMEʹAEFQSFDBUFE3FBTPOAΛ༩͑Δ 84 Field("name", StringType, resolve = { ctx => ctx.value.name }), Field("displayName", StringType, deprecationReason = Some("use `name` instead"), resolve = { ctx => ctx.value.name }),
85. (SBQI2-ʹ͓͚Δ
    $POUFYU 85
86. val userType: ObjectType[Ctx, User] = ObjectType[Ctx, User]( "User", fields[Ctx, User]( Field("id", IDType, resolve = { _.value.id }), Field("name", StringType, resolve = { ctx: Context[Ctx, User] => ctx.value.name }), Field("status", userStatusType, resolve = { _.value.status }), Field("projects", ListType(projectType), resolve = { ctx => ProjectResolver.byIds(ctx.value.projectIds)(ctx.ctx) }) ) ) 0CKFDU5ZQF 86
87. (SBQI2-ʹ͓͚Δ$POUFYU w (SBQI2-ͷܕʹ͓͚ΔSFTPMWFΛఆٛ͢Δࡍʹొ৔ ͢Δ$POUFYUʹԿΛ࣋ͨͤΔ͔
    w ʮ$POUFYUʯͱ͍͏໊લ͕೉͍͠
    w DPOUFYUVBMͳ৘ใͬͯԿʁ 87
88. (SBQI2-ʹ͓͚Δ$POUFYU w ྫϩάΠϯதͷϢʔβ΍%#΁ͷΞΫηεΛ࣋ͭ context
    "
    WBMVF
    XIJDI
    JT
    QSPWJEFE
    UP
    FWFSZ
    SFTPMWFS
    BOE
    IPMET
    JNQPSUBOU
    DPOUFYUVBM
    JOGPSNBUJPO
    MJLF
    UIF
    DVSSFOUMZ
    MPHHFE
    JO
    VTFS
    PS
    BDDFTT
    UP
    B
    EBUBCBTF
    IUUQTHSBQIRMPSHMFBSOFYFDVUJPOSPPUpFMETSFTPMWFST 88
89. (SBQI2-ʹ͓͚Δ$POUFYU w %#ΞΫηεՄೳͳ4FSWJDF3FQPTJUPSZͳͲ 89 IUUQTTBOHSJBHSBQIRMPSHMFBSOJOQVUBOEDPOUFYUPCKFDUT
90. (SBQI2-ʹ͓͚Δ$POUFYU w ͳΔ΄Ͳɺ%"0΍4FSWJDF΍3FQPTJUPSZΛ$POUFYU ͔ΒΞΫηεग़དྷΔΑ͏ʹͨ͠Βྑ͍Μͩͳʂ 90
91. (SBQI2-ʹ͓͚Δ$POUFYU w ͳΔ΄Ͳɺ%"0΍4FSWJDF΍3FQPTJUPSZΛ$POUFYU ͔ΒΞΫηεग़དྷΔΑ͏ʹͨ͠Βྑ͍Μͩͳʂ 91 ͓͢͢Ί͠ͳ͍
92. (SBQI2-ʹ͓͚Δ$POUFYU w %"0͕શͯͷϑΟʔϧυ͔Β$POUFYUܦ༝Ͱ޷͖ উखʹΞΫηεग़དྷΔΑ͏ʹͳͬͯ͠·ͬͯϨΠ Ϡʔ͕յΕΔ
    w SFTPMWFؔ਺ͰશͯΛ΍ͬͯ͠·͑Δঢ়ଶʹ
    w ݁Ռͱͯ͠(SBQI2-ϨΠϠ͕ް͘ͳΔ 92
93. (SBQI2-ʹ͓͚Δ$POUFYU w $POUFYU͸ಉҰϦΫΤετ಺Ͱڞ௨ͯ͠ࢀরՄೳ
    w (SBQI2-ΫΤϦͷ࣮ߦ୯Ґ ϦΫΤετ Ͱڞ௨͠ ͯࢀর͍ͨ͠΋ͷΛ࣋ͨͤΔ΂͖
    w ϩάΠϯϢʔβ
    w τϥϯβΫγϣϯ
    w &YFDVUJPO$POUFYU
    w FUD 93
94. w $POUFYUͷ࣮૷ྫ
    w ϩάΠϯϢʔβ
    w τϥϯβΫγϣϯ %#4FTTJPO
    w &YFDVUJPO$POUFYU class GraphQLContext( userOpt: Option[User], session: DBSession, ec: ExecutionContext ) (SBQI2-ʹ͓͚Δ$POUFYU 94
95. ೝূೝՄ 95
96. ೝূೝՄ w 8FCΞϓϦέʔγϣϯͳΒେମ͋Δ΍ͭ
    w ೝূ "VUIFOUJDBUJPO
    w ୭͔Λಛఆ͢Δ
    w ೝՄ "VUIPSJ[BUJPO
    w ݖݶΛ֬ೝ͢Δ
    w (SBQI2-ͱͲ͏૊Έ߹ΘͤΔ΂͖͔ɺͱ͍͏࿩ 96
97. ೝূ w ೝূͨ݁͠Ռ͸શମͰ࢖͍ճ͍ͨ͠
    w ෳ਺ͷ2VFSZ.VUBUJPOΛಉ࣌ʹ࣮ߦ͢Δࡍʹɺ ผʑʹೝূΛ͢Δͷ͸ྲྀੴʹڐ༰Ͱ͖ͳ͍
    w ೝূॲཧͦͷ΋ͷ͸(SBQI2-ͱ͸ؔ܎ͳ͍
    w $PPLJF࢖͓͏͕+85࢖͓͏͕͓޷͖ʹ 97
98. ೝূ w (SBQI2-ͷ$POUFYUΛ࡞੒͢ΔࡍʹೝূΛߦ͏
    w ೝূ݁ՌΛ$POUFYUʹೖΕͯ͠·͑͹ڞ༗ग़དྷΔ 98 object GraphQLContext { def create(userIdOpt: Option[String])( implicit ec: ExecutionContext, s: DBSession): GraphQLContext = { userIdOpt.flatMap { userId => authenticate(userId).map { user => new GraphQLContext(Some(user), ec, s) } } getOrElse { new GraphQLContext(None, ec, s) } } private def authenticate(userId: String): Option[User] = ??? } GBDUPSZͰೝূͭͭ͠ੜ੒
99. ೝূ w ೝূΛඞཁͱ͢Δ2VFSZ.VUBUJPOΛ࣮૷͢Δ
    w ೝূॲཧͦͷ΋ͷ͸(SBQI2-ͱ͸੾Γ཭͢
    w .JEEMFXBSF͕࢖͏ͱڧ੍Ͱ͖ͯศར
    w ΫΤϦ࣮ߦͷCFGPSFBGUFSʹॲཧΛࠩ͠ࠐΊΔ
    w TBOHSJBFYFDVUJPO഑ԼͷΫϥεΛར༻͢Δ
    w 'JFME5BH
    w .JEEMFXBSF.JEEMFXBSF#FGPSF'JFME 99
100. w ೝূඞਢʹ͍ͨ͠pFMEͷఆٛʹUBHΛ෇༩͢Δ
     w &YFDVUPSFYFDVUFʹNJEEMFXBSFͱͯ͠ "VUIFOUJDBUJPO'JMUFSΛ༩͑Ε͹ಈ͘ ೝূ val self: Field[Ctx, User] = Field( "self", userType, tags = Middlewares.RequireAuthentication :: Nil, resolve = { ctx => ctx.ctx.loggedInUser } ) ೝূඞਢͳ͜ͱΛλάͰ໌ࣔ Executor.execute[Ctx, Unit, JsObject]( schema, queryDocument, context, middleware = AuthenticationFilter :: Nil ) 100
101. ೝূ type Ctx = GraphQLContext case object RequireAuthentication extends FieldTag object AuthenticationFilter extends MiddlewareBeforeField[Ctx] { override type QueryVal = Unit override type FieldVal = Unit private type MCtx = MiddlewareQueryContext[Ctx, _, _] override def beforeQuery(context: MCtx) = () override def afterQuery(queryVal: QueryVal, context: MCtx) = () override def beforeField(queryVal: QueryVal, mctx: MCtx, ctx: Context[Ctx, _]) = { if (ctx.field.tags contains RequireAuthentication) { if (!ctx.ctx.isLoggedIn) { throw AuthenticationError("must logged in!") } } continue } } 101
102. type Ctx = GraphQLContext case object RequireAuthentication extends FieldTag object AuthenticationFilter extends MiddlewareBeforeField[Ctx] { override type QueryVal = Unit override type FieldVal = Unit private type MCtx = MiddlewareQueryContext[Ctx, _, _] override def beforeQuery(context: MCtx) = () override def afterQuery(queryVal: QueryVal, context: MCtx) = () override def beforeField(queryVal: QueryVal, mctx: MCtx, ctx: Context[Ctx, _]) = { if (ctx.field.tags contains RequireAuthentication) { if (!ctx.ctx.isLoggedIn) { throw AuthenticationError("must logged in!") } } continue } } ೝূ ೝূඞਢͳϑΟʔϧυʹ෇༩͢Δ5BH 102
103. type Ctx = GraphQLContext case object RequireAuthentication extends FieldTag object AuthenticationFilter extends MiddlewareBeforeField[Ctx] { override type QueryVal = Unit override type FieldVal = Unit private type MCtx = MiddlewareQueryContext[Ctx, _, _] override def beforeQuery(context: MCtx) = () override def afterQuery(queryVal: QueryVal, context: MCtx) = () override def beforeField(queryVal: QueryVal, mctx: MCtx, ctx: Context[Ctx, _]) = { if (ctx.field.tags contains RequireAuthentication) { if (!ctx.ctx.isLoggedIn) { throw AuthenticationError("must logged in!") } } continue } } ೝূ 0CKFDU5ZQF౳ͷpFMEʹࠩ͠ࠐΉॲཧ 103
104. type Ctx = GraphQLContext case object RequireAuthentication extends FieldTag object AuthenticationFilter extends MiddlewareBeforeField[Ctx] { override type QueryVal = Unit override type FieldVal = Unit private type MCtx = MiddlewareQueryContext[Ctx, _, _] override def beforeQuery(context: MCtx) = () override def afterQuery(queryVal: QueryVal, context: MCtx) = () override def beforeField(queryVal: QueryVal, mctx: MCtx, ctx: Context[Ctx, _]) = { if (ctx.field.tags contains RequireAuthentication) { if (!ctx.ctx.isLoggedIn) { throw AuthenticationError("must logged in!") } } continue } } ೝূ 3FRVJSF"VUIFOUJDBUJPOλά͕෇͍ͯΔͷʹ ϩάΠϯͯ͠ͳ͍৔߹͸ྫ֎Λૹग़ 104
105. ೝՄ w ೝՄ͸ΞϓϦέʔγϣϯ૚Ͱߦ͏
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106. %#τϥϯβΫγϣϯ 106
107. %#τϥϯβΫγϣϯ w Ͳͷ୯ҐͰτϥϯβΫγϣϯΛ࣮ߦ͢Δ͔
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108. %#τϥϯβΫγϣϯ w ݁࿦ɺϦΫΤετʹରͯ͠τϥϯβΫγϣϯ
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109. %#τϥϯβΫγϣϯ w τϥϯβΫγϣϯͷ੹຿͕(SBQI2-ϨΠϠʹʜ
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110. ΤϥʔϋϯυϦϯά 110
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     w Τϥʔ͸ϨεϙϯεϘσΟʹೖΕͯฦ٫͞ΕΔ 111
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113. ΤϥʔϋϯυϦϯά w ͍Ζ͍Ζબ୒ࢶ͸͋Δ
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     w SFTPMWFͰྫ֎͕౤͛ΒΕͳ͍Α͏ʹέΞ͕ඞཁ 113
114. ΤϥʔϋϯυϦϯά w ͰɺͲ͏͍ͯ͠Δ͔
     w Ұ෦ͷΤϥʔΛશମͷΤϥʔͱ͍ͯ͠Δ
     w ࣮૷ίετͱͷ݉Ͷ߹͍
     w Ұ෦Ͱ΋ࣦഊ͢ΔͷͬͯԿ͔͕͓͔͍͠
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115. ΤϥʔϋϯυϦϯά w Τϥʔͷछྨ͚ͩΘ͔ΔΑ͏ʹ
     w ϦΫΤετෆਖ਼αʔόΤϥʔೝূΤϥʔ sealed abstract class ErrorType(val value: String) object ErrorType { case object BadRequest extends ErrorType("BadRequest") case object ServerError extends ErrorType("ServerError") case object AuthError extends ErrorType("AuthError") } implicit val error = derive.deriveEnumType[ErrorType]() 115
116. ΤϥʔϋϯυϦϯά w Τϥʔͷछྨ͚ͩΘ͔ΔΑ͏ʹ
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117. ΤϥʔϋϯυϦϯά w Τϥʔͷछྨ͚ͩΘ͔ΔΑ͏ʹ
     w ϦΫΤετෆਖ਼αʔόΤϥʔೝূΤϥʔ sealed abstract class ErrorType(val value: String) object ErrorType { case object BadRequest extends ErrorType("BadRequest") case object ServerError extends ErrorType("ServerError") case object AuthError extends ErrorType("AuthError") } implicit val error = derive.deriveEnumType[ErrorType]() def handleException(m: ResultMarshaller, msg: String, tp: ErrorType) = HandledException( msg, additionalFields = Map("type" -> m.enumNode(tp.value, error.name)), addFieldsInExtensions = false, addFieldsInError = true ) 117
118. ΤϥʔϋϯυϦϯά w ϋϯυϦϯά͢Δ΂͖Τϥʔ͕ଟ͍
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119. ΤϥʔϋϯυϦϯά private val exceptionHandler = { def handleException(m: ResultMarshaller, msg: String, tp: ErrorType) = HandledException( msg, additionalFields = Map("type" -> m.enumNode(tp.value, errorType.name)), addFieldsInExtensions = false, addFieldsInError = true ) val onException: PartialFunction[(ResultMarshaller, Throwable), HandledException] = { case (m, qa: QueryAnalysisError) => logger.warn(s"QueryAnalysisError occurred. msg = ${qa.getMessage}") handleException(m, qa.getMessage, ErrorType.BadRequest) case (m, se: SyntaxError) => logger.info(s"SyntaxError occurred. msg = ${se.getMessage()}") handleException(m, se.getMessage, ErrorType.BadRequest) case (m, ewr: ErrorWithResolver) => logger.error(s"ErrorWithResolver occurred. msg = ${ewr.getMessage}", ewr) handleException(m, ewr.getMessage, ErrorType.ServerError) case (m, AuthenticationError(msg)) => logger.info(s"AuthenticationError occurred. msg = ${msg}") handleException(m, msg, ErrorType.BadRequest) case (m, NotFoundException(msg)) => logger.info(s"NotFoundException occurred. msg = ${msg}") handleException(m, msg, ErrorType.BadRequest) case (m, t: Throwable) => logger.error(s"unknown server error occurred. msg = ${t.getMessage}", t) handleException(m, t.getMessage, ErrorType.ServerError) } val onViolation: PartialFunction[(ResultMarshaller, Violation), HandledException] = { case (m, v) => logger.warn(s"Violation error occurred. msg = ${v.errorMessage}") handleException(m, v.errorMessage, ErrorType.BadRequest) } val onUserFacingError : PartialFunction[(ResultMarshaller, UserFacingError), HandledException] = { case (m, v: WithViolations) => logger.warn(s"WithViolations occurred. msg = ${v.getMessage()}") handleException(m, v.getMessage, ErrorType.BadRequest) case (m, ie: InternalError) => logger.error(s"InternalError occurred. msg = ${ie.getMessage()}", ie) handleException(m, ie.getMessage, ErrorType.ServerError) case (m, ee: ExecutionError) => logger.error(s"ExecutionError occurred. msg = ${ee.getMessage()}", ee) handleException(m, ee.getMessage, ErrorType.ServerError) case (m, ufe) => logger.warn(s"UserFacingError occurred. msg = ${ufe.getMessage()}") handleException(m, ufe.getMessage, ErrorType.BadRequest) } ExceptionHandler(onException, onViolation, onUserFacingError) } Future.fromTry(QueryParser.parse(document)) zip GraphQLContext.create(userIdOpt) flatMap { case (queryDocument: Document, context: GraphQLContext) => val result: Future[JsValue] = Executor.execute[Ctx, Unit, JsObject]( schema, queryDocument, context, exceptionHandler = exceptionHandler, operationName = operation, variables = vars, middleware = Middlewares.value ) result .map { jsValue => OK -> jsValue } .recover { case error: QueryAnalysisError => BadRequest -> error.resolveError case error: ErrorWithResolver => InternalServerError -> error.resolveError } } recover { case v: SyntaxError => BadRequest -> new Exception(v.getMessage()) with ErrorWithResolver with WithViolations { override def exceptionHandler: ExceptionHandler = GraphQLServer.exceptionHandler override def violations: Vector[Violation] = Vector.empty }.resolveError case v: ValidationError => BadRequest -> v.resolveError case NonFatal(t) => InternalServerError -> InternalError(t, GraphQLServer.exceptionHandler).resolveError } 119
120. ΤϥʔϋϯυϦϯά private val exceptionHandler = { def handleException(m: ResultMarshaller, msg: String, tp: ErrorType) = HandledException( msg, additionalFields = Map("type" -> m.enumNode(tp.value, errorType.name)), addFieldsInExtensions = false, addFieldsInError = true ) val onException: PartialFunction[(ResultMarshaller, Throwable), HandledException] = { case (m, qa: QueryAnalysisError) => logger.warn(s"QueryAnalysisError occurred. msg = ${qa.getMessage}") handleException(m, qa.getMessage, ErrorType.BadRequest) case (m, se: SyntaxError) => logger.info(s"SyntaxError occurred. msg = ${se.getMessage()}") handleException(m, se.getMessage, ErrorType.BadRequest) case (m, ewr: ErrorWithResolver) => logger.error(s"ErrorWithResolver occurred. msg = ${ewr.getMessage}", ewr) handleException(m, ewr.getMessage, ErrorType.ServerError) case (m, AuthenticationError(msg)) => logger.info(s"AuthenticationError occurred. msg = ${msg}") handleException(m, msg, ErrorType.BadRequest) case (m, NotFoundException(msg)) => logger.info(s"NotFoundException occurred. msg = ${msg}") handleException(m, msg, ErrorType.BadRequest) case (m, t: Throwable) => logger.error(s"unknown server error occurred. msg = ${t.getMessage}", t) handleException(m, t.getMessage, ErrorType.ServerError) } val onViolation: PartialFunction[(ResultMarshaller, Violation), HandledException] = { case (m, v) => logger.warn(s"Violation error occurred. msg = ${v.errorMessage}") handleException(m, v.errorMessage, ErrorType.BadRequest) } val onUserFacingError : PartialFunction[(ResultMarshaller, UserFacingError), HandledException] = { case (m, v: WithViolations) => logger.warn(s"WithViolations occurred. msg = ${v.getMessage()}") handleException(m, v.getMessage, ErrorType.BadRequest) case (m, ie: InternalError) => logger.error(s"InternalError occurred. msg = ${ie.getMessage()}", ie) handleException(m, ie.getMessage, ErrorType.ServerError) case (m, ee: ExecutionError) => logger.error(s"ExecutionError occurred. msg = ${ee.getMessage()}", ee) handleException(m, ee.getMessage, ErrorType.ServerError) case (m, ufe) => logger.warn(s"UserFacingError occurred. msg = ${ufe.getMessage()}") handleException(m, ufe.getMessage, ErrorType.BadRequest) } ExceptionHandler(onException, onViolation, onUserFacingError) } Future.fromTry(QueryParser.parse(document)) zip GraphQLContext.create(userIdOpt) flatMap { case (queryDocument: Document, context: GraphQLContext) => val result: Future[JsValue] = Executor.execute[Ctx, Unit, JsObject]( schema, queryDocument, context, exceptionHandler = exceptionHandler, operationName = operation, variables = vars, middleware = Middlewares.value ) result .map { jsValue => OK -> jsValue } .recover { case error: QueryAnalysisError => BadRequest -> error.resolveError case error: ErrorWithResolver => InternalServerError -> error.resolveError } } recover { case v: SyntaxError => BadRequest -> new Exception(v.getMessage()) with ErrorWithResolver with WithViolations { override def exceptionHandler: ExceptionHandler = GraphQLServer.exceptionHandler override def violations: Vector[Violation] = Vector.empty }.resolveError case v: ValidationError => BadRequest -> v.resolveError case NonFatal(t) => InternalServerError -> InternalError(t, GraphQLServer.exceptionHandler).resolveError } ΍Δ͔͠ͳ͍ 120
121. / ໰୊ 121
122. / ໰୊ w (SBQI2-Ͱ͸ϦΫΤετΛճʹݻఆͰ͖Δ
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124. / ໰୊ w / Λճආ͢ΔͨΊͷ࢓૊Έ͕ఏڙ͞Ε͍ͯΔ
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125. object UserResolver { private implicit lazy val hasId: HasId[User, UserId] = HasId(_.id) val userFetcher: Fetcher[GraphQLContext, User, User, UserId] = { Fetcher.apply { (ctx: GraphQLContext, ids: Seq[UserId]) => UserDao.findByIds(ids)(ctx.ec) } } def byId(userId: UserId)( implicit ctx: GraphQLContext): DeferredValue[GraphQLContext, User] = { DeferredValue(userFetcher.defer(userId)) } } / ໰୊ 125
126. object UserResolver { private implicit lazy val hasId: HasId[User, UserId] = HasId(_.id) val userFetcher: Fetcher[GraphQLContext, User, User, UserId] = { Fetcher.apply { (ctx: GraphQLContext, ids: Seq[UserId]) => UserDao.findByIds(ids)(ctx.ec) } } def byId(userId: UserId)( implicit ctx: GraphQLContext): DeferredValue[GraphQLContext, User] = { DeferredValue(userFetcher.defer(userId)) } } / ໰୊ 126 4FR<6TFS*E>
     
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127. object UserResolver { private implicit lazy val hasId: HasId[User, UserId] = HasId(_.id) val userFetcher: Fetcher[GraphQLContext, User, User, UserId] = { Fetcher.apply { (ctx: GraphQLContext, ids: Seq[UserId]) => UserDao.findByIds(ids)(ctx.ec) } } def byId(userId: UserId)( implicit ctx: GraphQLContext): DeferredValue[GraphQLContext, User] = { DeferredValue(userFetcher.defer(userId)) } } / ໰୊ 127 4FR<6TFS*E>
     
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128. object UserResolver { private implicit lazy val hasId: HasId[User, UserId] = HasId(_.id) val userFetcher: Fetcher[GraphQLContext, User, User, UserId] = { Fetcher.apply { (ctx: GraphQLContext, ids: Seq[UserId]) => UserDao.findByIds(ids)(ctx.ec) } } def byId(userId: UserId)( implicit ctx: GraphQLContext): DeferredValue[GraphQLContext, User] = { DeferredValue(userFetcher.defer(userId)) } } / ໰୊ 128 'FUDIFSEFGFSͰ*%Λ౉͢ͱ
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129. / ໰୊ 129 w ؔ࿈Λ୧Δ/ Λղফ͢Δͷ΋༻ҙ͞Ε͍ͯΔ object UserResolver { private val usersByProjects: Relation[User, User, ProjectId] = Relation[User, ProjectId]("byProjects", { u: User => u.projectIds }) lazy val userFetcherByProject: Fetcher[GraphQLContext, User, User, UserId] = { Fetcher.relOnly { (ctx: GraphQLContext, rel: RelationIds[User]) => val ids: Seq[ProjectId] = rel.apply(usersByProjects) UserDao.findByProjectIds(ids)(ctx.ec) } } def findByProjectId(projectId: ProjectId)( implicit ctx: GraphQLContext): DeferredValue[GraphQLContext, Seq[User]] = { DeferredValue(userFetcherByProject.deferRelSeq(usersByProjects, projectId)) } }
130. ·ͱΊ 130
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