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at Go 1.10 Release Party in Tokyo
more expressive gRPC client
Evans
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XIPBNJ
!cJE
LUS@
ձେֶֶ෦
ιϥϛπגࣜձࣾαʔόΤϯδχΞ
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at Go 1.10 Release Party in Tokyo
more expressive gRPC client
Evans
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No content
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ΞδΣϯμ
w H31$ͱΫϥΠΞϯτπʔϧ܈
w &WBOTͱ&WBOT͕ࢦͨ͠ͷ
w &WBOTͷΞʔΩςΫνϟͱ࣮
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H31$
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gRPC
DMJFOUTFSWFSؒͰಁաతʹ௨৴Ͱ͖ΔγεςϜΛ
ߏங͢ΔͨΊͷ31$ϑϨʔϜϫʔΫ
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gRPC
*%-Ͱ"1*εΩʔϚΛఆٛ͢Δ
ΫϥΠΞϯταʔόͷίʔυΛੜ͢Δ
αʔόͷϩδοΫΛ࣮͢Δ
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H31$3FNPUF1SPDFEVSF$BMMT
PGDPVSTF
IUUQTHSQDJPGBR
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No content
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gRPC ͷྑ͍ͱ͜Ζ
w"1*༷ͱ࣮ͷဃΛ͙͜ͱ͕Ͱ͖Δ
wΫϥΠΞϯταʔόؒͷ*'͕ഊ͠ͳ͍
w4USFBNJOH31$
wFUD
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gRPC ͷͭΒ͍ͱ͜Ζ
w)551͔͠αϙʔτ͍ͯ͠ͳ͍
wπʔϧɾϛυϧΣΞ܈͕ॆ࣮͍ͯ͠ͳ͍
w"1*ͷσόοά͕ͮ͠Β͍
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gRPC ͷͭΒ͍ͱ͜Ζ
w)551͔͠αϙʔτ͍ͯ͠ͳ͍
wπʔϧɾϛυϧΣΞ܈͕ॆ࣮͍ͯ͠ͳ͍
w"1*ͷσόοά͕ͮ͠Β͍
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API ͷσόοά͕ͮ͠Β͍
wH31$σʔλΛγϦΞϥΠζͯ͠ΓͱΓ͢Δ
wDVSMXHFUͰςετͰ͖ͳ͍
wΫϥΠΞϯτίʔυΛ࣮͢ΔPSπʔϧͷར༻
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grpc-ecosystem / polyglot
w "'"*,
࠷ߴػೳͳΫϥΠΞϯτ
w+BWB
wͨ͘͞ΜͷΦϓγϣϯΛίϚϯυϥΠϯͰࢦఆ͢
Δඞཁ͕͋ͬͯࡶ
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grpc-ecosystem / polyglot
1 $ echo | java -jar polyglot.jar \
2 --command=call \
3 --endpoint=: \
4 --full_method= \
5 --proto_discovery_root=
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njpatel / grpcc
w/PEFKT
w3&1-PS$-*Ͱͷ࣮ߦ͕Մೳ
w3&1-Ͱ+BWB4DSJQUΛॻ͘ඞཁ͕͋Δ
wิ͕ͳ͍
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njpatel / grpcc
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͍·͍ͪͬ͘͠Γ͜ͳ͍
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ސ٬
͕ຊʹཉ͔ͬͨ͠ͷ
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ސ٬
͕ຊʹཉ͔ͬͨ͠ͷ
ָʹςετͰ͖ΔΫϥΠΞϯτ
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Ұ͔Βͭ͘Δͧ
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LUSFWBOT
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ktr0731 / evans
w(P
wָʹ͔ͭ͑ΔΫϥΠΞϯτ
w1SPUPDPM#V⒎FST
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Ϣʔεέʔε
wσόοά
ɺςετ
wγΣϧεΫϦϓτͷΈࠐΈ
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σόοάɺςετ
wجຊతʹखಈͰ"1*Λୟ͘
wͰ͖Δ͚ͩλΠϓͨ͘͠ͳ͍
w๛ͳิ͕ཉ͍͠
wෳͷ"1*Λୟ͖͍ͨ߹͋Δ
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γΣϧεΫϦϓτͷΈࠐΈ
wTUEJOPSpMFTUEPVU
wΈࠐΈ͍͢ΠϯλʔϑΣʔε͕ඞཁ
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Ϣʔεέʔε
wσόοά
ɺςετ
3&1-Ϟʔυ
wγΣϧεΫϦϓτͷΈࠐΈ
ίϚϯυϥΠϯϞʔυ
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EFNP
LUSFWBOTEFNP
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No content
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No content
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Evans Internal
w εΩʔϚͷϩʔυ
w &WBOTͷϞσϧͷม
w 31$ͷൃߦ $-*Ϟʔυ
PS
3&1-ͷىಈ 3&1-Ϟʔυ
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DBTF3&1-31$DBMM
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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 }
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wHPMBOHQSPUPCVGEFTDSJQUPS
wHPMBOHQSPUPCVGQSPUP
εΩʔϚͷϩʔυ
1 code, _ := runProtoc(args)
2 ds := descriptor.FileDescriptorSet{}
3 proto.Unmarshal(code, &ds)
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Ϟσϧͷม
wΞϓϦέʔγϣϯ͔Βѻ͍͘͢͢ΔͨΊ
wKIVNQQSPUPSFqFDUͷґଘΛͳͨ͘͢Ί ޙड़
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REPL: read
wDCBUBHPQSPNQU
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REPL: read / eval
wϑΟʔϧυΛ࠶ؼతʹḷΔ
wϓϦϛςΟϒܕͰ͋ΕΛೖྗͤ͞Δ
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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
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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
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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 }
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ϓϦϛςΟϒܕͷೖྗ
wೖྗΛड͚͚ͭΔ DCBUBHPQSPNQU
wରԠ͢Δܕม
wϑΟʔϧυʹΛηοτ͢Δ KIVNQQSPUPSFqFDU
wೖྗରͷϝοηʔδಈతʹܾఆ͞ΕΔ
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ϝοηʔδͷಈతͳߏங
wKIVNQQSPUPSFqFDUEZOBNJD.FTTBHF
wQSPUP.BSTIBMFS࣮Λ࣋ͭ
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ϝοηʔδͷಈతͳߏங
֤ϑΟʔϧυΛEZOBNJD.FTTBHF͕อ࣋
#V⒎FS.BSTIBMQSPUP.FTTBHFͱͯ͠͞ΕΔ
.BSTIBM͕QSPUP.BSTIBMFSͷ࣮ΛݺͿ
EZOBNJD.FTTBHF.BSTIBMʹΑΓγϦΞϥΠζ
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QSPUP.FTTBHF
QSPUP.BSTIBMFS
EZOBNJD.FTTBHF
Marshal() ([]byte, error)
CVG
WBMVFT
encode
marshal each field values
ϝοηʔδͷಈతͳߏங
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ΞʔΩςΫνϟ
w $MFBO"SDIJUFDUVSF
w )FYBHPOBM"SDIJUFDUVSF
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ͳͥ CA / HA ͔ʁ
w ࠜװΛࢧ͑ΔϥΠϒϥϦ͕ະख़
w $-*Ϟʔυɺ3&1-Ϟʔυ͕͋Δ
w ίϯϙʔωϯτ͕ଟ͍
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JOQVUUFS*'
3&1-
1SPNQU*OQVUUFS
DCBUBHPQSPNQU
$-*
+40/JOQVUUFS
FODPEJOHKTPO
Entity layer
Adapter layer UseCase layer
EFTDSJQUPST
KIVNQQSPUPSFqFDU
pFMET
NFTTBHF
TFSWJDF*'
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TODOs
w ετϦʔϜछ
w 5-4ରԠ
w ϦϑϨΫγϣϯαʔόରԠ
w FUD
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TODOs
w ετϦʔϜछ
w 5-4ରԠ
w ϦϑϨΫγϣϯαʔόରԠ
w FUD
1VMM3FRVFTUT*TTVFT
XFMDPNF
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·ͱΊ
w ݸਓతʹ
ָʹ͔ͭ͑ΔΫϥΠΞϯτ͕Ͱ͖ͨ
w ڊਓͷݞʹ͍ͬͯΔ͓͔͛Ͱ͢
w ͱ͍͑50%0·ͩଟ͍
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·ͱΊ
w ݸਓతʹ
ָʹ͔ͭ͑ΔΫϥΠΞϯτ͕Ͱ͖ͨ
w ڊਓͷݞʹ͍ͬͯΔ͓͔͛Ͱ͢
w ͱ͍͑50%0·ͩଟ͍
͍ͬͯͧ͘ʂʂ