Evans: more expressive gRPC client

Transcript

1. at Go 1.10 Release Party in Tokyo more expressive gRPC

   client Evans

2. 
   XIPBNJ !cJE LUS@ 
   ձ௡େֶ
   ֶ෦
   
   ೥
   ιϥϛπגࣜձࣾ
   αʔόΤϯδχΞ

3. at Go 1.10 Release Party in Tokyo more expressive gRPC

   client Evans
4. None

5. ΞδΣϯμ w H31$
   ͱΫϥΠΞϯτπʔϧ܈
   w &WBOT
   ͱ
   &WBOT
   ͕໨ࢦͨ͠΋ͷ
   w &WBOT
   ͷΞʔΩςΫνϟͱ࣮૷

6. H31$

7. gRPC DMJFOU
   
   TFSWFS
   ؒͰಁաతʹ௨৴Ͱ͖ΔγεςϜΛ ߏங͢ΔͨΊͷ
   31$
   ϑϨʔϜϫʔΫ
   

8. gRPC 
   *%-
   Ͱ
   "1*
   εΩʔϚΛఆٛ͢Δ
   
   ΫϥΠΞϯτ
   
   αʔόͷίʔυΛੜ੒͢Δ
   
   αʔόͷϩδοΫΛ࣮૷͢Δ

9. H31$
   3FNPUF
   1SPDFEVSF
   $BMMT
   PG
   DPVSTF IUUQTHSQDJPGBR

10. None

11. gRPC ͷྑ͍ͱ͜Ζ w
    "1*
    ࢓༷ͱ࣮૷ͷဃ཭Λ๷͙͜ͱ͕Ͱ͖Δ
    w
    ΫϥΠΞϯτ
    
    αʔόؒͷ
    *
    
    '͕෗ഊ͠ͳ͍
    w
    4USFBNJOH
    31$
    w
    FUD

12. gRPC ͷͭΒ͍ͱ͜Ζ w
    )551
    ͔͠αϙʔτ͍ͯ͠ͳ͍
    w
    πʔϧɾϛυϧ΢ΣΞ܈͕ॆ࣮͍ͯ͠ͳ͍
    w
    "1*
    ͷσόοά͕ͮ͠Β͍

13. gRPC ͷͭΒ͍ͱ͜Ζ w
    )551
    ͔͠αϙʔτ͍ͯ͠ͳ͍
    w
    πʔϧɾϛυϧ΢ΣΞ܈͕ॆ࣮͍ͯ͠ͳ͍
    w
    "1*
    ͷσόοά͕ͮ͠Β͍

14. API ͷσόοά͕ͮ͠Β͍ w
    H31$
    ͸σʔλΛγϦΞϥΠζͯ͠΍ΓͱΓ͢Δ
    w
    DVSM
    ΍
    XHFU
    ౳ͰςετͰ͖ͳ͍
    w
    ΫϥΠΞϯτίʔυΛ࣮૷͢Δ
    PS
    πʔϧͷར༻

15. grpc-ecosystem / polyglot w
    "'"*,
    ࠷΋ߴػೳͳΫϥΠΞϯτ
    w
    +BWB
    ੡
    w
    ͨ͘͞ΜͷΦϓγϣϯΛίϚϯυϥΠϯͰࢦఆ͢ Δඞཁ͕͋ͬͯ൥ࡶ

16. grpc-ecosystem / polyglot 1 $ echo <json-request> | java -jar

    polyglot.jar \ 2 --command=call \ 3 --endpoint=<host>:<port> \ 4 --full_method=<some.package.Service/doSomething> \ 5 --proto_discovery_root=<path>

17. njpatel / grpcc w
    /PEFKT
    ੡
    w
    3&1-
    PS
    $-*
    Ͱͷ࣮ߦ͕Մೳ
    w
    3&1-
    Ͱ
    +BWB4DSJQU
    Λॻ͘ඞཁ͕͋Δ
    w
    ิ׬͕ͳ͍

18. njpatel / grpcc

19. ͍·͍ͪͬ͘͠Γ͜ͳ͍
    

20. ސ٬
    
    ͕ຊ౰ʹཉ͔ͬͨ͠΋ͷ

21. ސ٬
    
    ͕ຊ౰ʹཉ͔ͬͨ͠΋ͷ ָʹςετͰ͖ΔΫϥΠΞϯτ

22. Ұ͔Βͭ͘Δͧ
    
    

23. LUS
    
    FWBOT

24. ktr0731 / evans w
    (P
    ੡
    w
    ָʹ͔ͭ͑ΔΫϥΠΞϯτ
    w
    1SPUPDPM
    #V⒎FST
    

25. Ϣʔεέʔε w
    σόοά ɺςετ
    w
    γΣϧεΫϦϓτ΁ͷ૊ΈࠐΈ

26. σόοάɺςετ w
    جຊతʹखಈͰ
    "1*
    Λୟ͘
    w
    Ͱ͖Δ͚ͩλΠϓͨ͘͠ͳ͍
    w
    ๛෋ͳิ׬͕ཉ͍͠
    w
    ෳ਺ͷ
    "1*
    Λୟ͖͍ͨ৔߹΋͋Δ

27. γΣϧεΫϦϓτ΁ͷ૊ΈࠐΈ w
    TUEJO
    PS
    pMF
    
    TUEPVU
    w
    ૊ΈࠐΈ΍͍͢ΠϯλʔϑΣʔε͕ඞཁ

28. Ϣʔεέʔε w
    σόοά ɺςετ
    
    
    3&1-
    Ϟʔυ
    w
    γΣϧεΫϦϓτ΁ͷ૊ΈࠐΈ
    
    
    ίϚϯυϥΠϯϞʔυ

29. EFNP
    LUS
    
    FWBOTEFNP

30. None
31. None

32. Evans Internal w εΩʔϚͷϩʔυ
    w &WBOT
    ͷϞσϧ΁ͷม׵
    w 31$
    ͷൃߦ
    $-*
    Ϟʔυ
    PS
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    

    3&1-
    ͷىಈ
    3&1-
    Ϟʔυ

33. DBTF
    3&1-
    
    31$
    DBMM

34. εΩʔϚͷϩʔυ 1 func runProtoc(args []string) ([]byte, error) { 2 buf,

    errBuf := new(bytes.Buffer), new(bytes.Buffer) 3 4 // with "--descriptor_set_out=/dev/stdout" 5 cmd := exec.Command("protoc", args...) 6 cmd.Stdout = buf 7 cmd.Stderr = errBuf 8 if err := cmd.Run(); err != nil { 9 if errBuf.Len() != 0 { 10 return nil, errors.New(errBuf.String()) 11 } 12 return nil, err 13 } 14 return buf.Bytes(), nil 15 }

35. w
    HPMBOHQSPUPCVGEFTDSJQUPS
    w
    HPMBOHQSPUPCVGQSPUP εΩʔϚͷϩʔυ 1 code, _ := runProtoc(args) 2 ds

    := descriptor.FileDescriptorSet{} 3 proto.Unmarshal(code, &ds)

36. Ϟσϧ΁ͷม׵ w
    ΞϓϦέʔγϣϯ͔Βѻ͍΍͘͢͢ΔͨΊ
    w
    KIVNQQSPUPSFqFDU
    ΁ͷґଘΛͳͨ͘͢Ί
    ޙड़

37. REPL: read w
    DCBUBHPQSPNQU

38. REPL: read / eval w
    ϑΟʔϧυΛ࠶ؼతʹḷΔ
    w
    ϓϦϛςΟϒܕͰ͋Ε͹஋Λೖྗͤ͞Δ

39. 1 message User { 2 string first_name = 1; 3

    string last_name = 2; 4 Gender gender = 3; 5 } 6 7 message RegisterUsersRequest { 8 repeated User users = 1; 9 } type = "double" | "float" | "int32" | "int64" | "uint32" | "uint64" | "sint32" | "sint64" | "fixed32" | "fixed64" | "sfixed32" | "sfixed64" | "bool" | "string" | "bytes" | messageType | enumType

40. 1 message User { 2 string first_name = 1; 3

    string last_name = 2; 4 Gender gender = 3; 5 } 6 7 message RegisterUsersRequest { 8 repeated User users = 1; 9 } type = "double" | "float" | "int32" | "int64" | "uint32" | "uint64" | "sint32" | "sint64" | "fixed32" | "fixed64" | "sfixed32" | "sfixed64" | "bool" | "string" | "bytes" | messageType | enumType

41. type = "double" | "float" | "int32" | "int64" |

    "uint32" | "uint64" | "sint32" | "sint64" | "fixed32" | "fixed64" | "sfixed32" | "sfixed64" | "bool" | "string" | "bytes" | messageType | enumType 1 message User { 2 string first_name = 1; 3 string last_name = 2; 4 Gender gender = 3; 5 } 6 7 message RegisterUsersRequest { 8 repeated User users = 1; 9 }

42. ϓϦϛςΟϒܕͷೖྗ w
    ೖྗΛड͚͚ͭΔ
    DCBUBHPQSPNQU
    w
    ରԠ͢Δܕ΁ม׵
    w
    ϑΟʔϧυʹ஋Ληοτ͢Δ
    KIVNQQSPUPSFqFDU
    w
    ೖྗର৅ͷϝοηʔδ͸ಈతʹܾఆ͞ΕΔ

43. ϝοηʔδͷಈతͳߏங w
    KIVNQQSPUPSFqFDUEZOBNJD.FTTBHF
    w
    QSPUP.BSTIBMFS
    ࣮૷Λ࣋ͭ

44. ϝοηʔδͷಈతͳߏங 
    ֤ϑΟʔϧυ஋Λ
    EZOBNJD.FTTBHF
    ͕อ࣋
    
    #V⒎FS.BSTIBM
    ΁
    QSPUP.FTTBHF
    ͱͯ͠౉͞ΕΔ
    
    .BSTIBM
    ͕
    QSPUP.BSTIBMFS
    ͷ࣮૷ΛݺͿ
    
    EZOBNJD.FTTBHF.BSTIBM
    ʹΑΓγϦΞϥΠζ

45. QSPUP.FTTBHF
    QSPUP.BSTIBMFS EZOBNJD.FTTBHF Marshal() ([]byte, error) CVG WBMVFT encode marshal

    each field values ϝοηʔδͷಈతͳߏங

46. ΞʔΩςΫνϟ w $MFBO
    "SDIJUFDUVSF
    w )FYBHPOBM
    "SDIJUFDUVSF

47. ͳͥ CA / HA ͔ʁ w ࠜװΛࢧ͑ΔϥΠϒϥϦ͕ະ੒ख़
    w $-*
    Ϟʔυɺ3&1-
    Ϟʔυ͕͋Δ
    w

    ίϯϙʔωϯτ͕ଟ͍

48. JOQVUUFS
    *' 3&1-
    1SPNQU
    *OQVUUFS
    DCBUBHPQSPNQU $-*
    +40/
    JOQVUUFS
    FODPEJOHKTPO Entity layer Adapter

    layer UseCase layer EFTDSJQUPST
    KIVNQQSPUPSFqFDU pFMET
    NFTTBHF
    TFSWJDF
    *'

49. TODOs w ετϦʔϜ
    
    छ
    
    w 5-4
    ରԠ
    w ϦϑϨΫγϣϯαʔόରԠ
    w FUD

50. TODOs w ετϦʔϜ
    
    छ
    
    w 5-4
    ରԠ
    w ϦϑϨΫγϣϯαʔόରԠ
    w FUD 1VMM
    3FRVFTUT
    
    *TTVFT
    

    XFMDPNF

51. ·ͱΊ w ݸਓతʹ͸
    ָʹ͔ͭ͑ΔΫϥΠΞϯτ͕Ͱ͖ͨ
    w ڊਓͷݞʹ৐͍ͬͯΔ͓͔͛Ͱ͢
    
    w ͱ͸͍͑
    50%0
    ͸·ͩଟ͍

52. ·ͱΊ w ݸਓతʹ͸
    ָʹ͔ͭ͑ΔΫϥΠΞϯτ͕Ͱ͖ͨ
    w ڊਓͷݞʹ৐͍ͬͯΔ͓͔͛Ͱ͢
    
    w ͱ͸͍͑
    50%0
    ͸·ͩଟ͍ ΍͍ͬͯͧ͘ʂʂ