ΠϝʔδͰཧղ͢Δ

ࠓ೔ͷΰʔϧ ɾH31$ͬͯͳʹʁ ɾ31$ͬͯͳʹʁ ɾͲ͏΍࣮ͬͯ૷͢Δͷʁ

ͬͯͳʹʁ

H31$ (PPHMF͕࡞ͬͨ31$ϑϨʔϜϫʔΫ

31$ͬͯͳʹʁ

31$ 3FNPUF1SPDFEVSF$BMM

31$ DMJFOU͕ࣗ਎ͷϝιουΛ࣮ߦ͢Δײ֮Ͱ TFSWFS্ͷϝιουΛ࣮ߦͰ͖Δ͘͠Έ

ͭ·ΓɺͲ͏͍͏͜ͱʁ

DMJFOUͱTFSWFSʹಉ໊ϝιου͕͋ͬͯ IUUQTJDPOTDPNJDPOTTFUTFSWFS DMJFOU TFSWFS Find() Find()

DMJFOU͕ϝιουΛ࣮ߦ͢Δͱ DMJFOU TFSWFS Find() Find() IUUQTJDPOTDPNJDPOTTFUTFSWFS

TFSWFSଆͷಉ໊ϝιου͕࣮ߦ͞Ε DMJFOU TFSWFS Find() Find() SFRVFTU IUUQTJDPOTDPNJDPOTTFUTFSWFS

ͦͷฦΓ஋͕DMJFOUଆͷฦΓ஋ʹͳΔ DMJFOU TFSWFS Find() Find() SFRVFTU SFTQPOTF IUUQTJDPOTDPNJDPOTTFUTFSWFS

H31$͸͜ͷؒΛ͏·͘΍ͬͯ͘ΕΔ DMJFOU TFSWFS Find() Find() SFRVFTU SFTQPOTF IUUQTJDPOTDPNJDPOTTFUTFSWFS

const res = axios.get("/api/v1/users/1") js req := FindRequest({ID: 1}) res, err = user.Find(req) go 3&45 31$ ͜Μͳ࢖͍ํ͕Ͱ͖·͢

Ͳ͏΍࣮ͬͯ૷͢Δͷʁ

31$Λ࣮ݱ͢Δʹ͸ SFRVFTU DMJFOU TFSWFS SFTQPOTF IUUQTJDPOTDPNJDPOTTFUTFSWFS

ڞ௨ೝ͕ࣝඞཁ SFRVFTU DMJFOU TFSWFS SFTQPOTF ϝιουͷ໊લ ϦΫΤετͷܗࣜ Ϩεϙϯεͷܗࣜ IUUQTJDPOTDPNJDPOTTFUTFSWFS

ͦΕ͕ɺQSPUPϑΝΠϧ SFRVFTU DMJFOU TFSWFS SFTQPOTF QSPUP IUUQTJDPOTDPNJDPOTTFUTFSWFS

QSPUPϑΝΠϧͷྫ service User { rpc Find(FindRequest) returns (FindResponse) {} } message FindRequest { int32 id = 1; } message FindResponse { string name = 1; } user_service.proto

QSPUPϑΝΠϧͷྫ user_service.proto ϦΫΤετͷܗࣜ Ϩεϙϯεͷܗࣜ service User { rpc Find(FindRequest) returns (FindResponse) {} } message FindRequest { int32 id = 1; } message FindResponse { string name = 1; }

service User { rpc Find(FindRequest) returns (FindResponse) {} } message FindRequest { int32 id = 1; } message FindResponse { string name = 1; } QSPUPϑΝΠϧͷྫ user_service.proto ˢϝιουͷఆٛ

QSPUP QCHP ࣍ʹɺΠϯλʔϑΣʔεΛੜ੒͢Δ QSPUPD QSPUPDΠϯλʔϑΣʔεΛੜ੒͢ΔͨΊͷίϚϯυ

QSPUP QCHP ࣍ʹɺΠϯλʔϑΣʔεΛੜ੒͢Δ QSPUPD ͍ΖΜͳJOUFSGBDF΍GVOD͕ࣗಈੜ੒ ͞ΕΔɽਓ͸Ұ੾͍͡Βͳ͍

ॏཁͳ෦෼͚ͩϐοΫΞοϓ type UserServer interface { Find( context.Context, *FindRequest ) (*FindResponse, error) } user_service.pb.go αʔόଆͷΠϯλʔϑΣʔε αʔόଆ͸͜Εʹ߹ΘͤͯϝιουΛ࣮૷͢Δ

ॏཁͳ෦෼͚ͩϐοΫΞοϓ type UserClient interface { Find( ctx context.Context, in *FindRequest, opts ...grpc.CallOption ) (*FindResponse, error) } ΫϥΠΞϯτଆͷΠϯλʔϑΣʔε ΫϥΠΞϯτଆ͸͜Εʹ߹ΘͤͯϝιουΛ࢖͏ user_service.pb.go

ॏཁͳ෦෼͚ͩϐοΫΞοϓ func (c *userClient) Find( ctx context.Context, in *FindRequest, opts ...grpc.CallOption ) (*FindResponse, error) { out := new(FindResponse) err := c.cc.Invoke( ctx, "/user_service.User/Find", in, out, opts... ) if err != nil { return nil, err } return out, nil } ΫϥΠΞϯτଆͷϝιου ΫϥΠΞϯτଆ͕ݺͼग़͢ϝιου͸࣮૷ࡁΈ user_service.pb.go

QSPUP QCHP ͪͳΈʹɺෳ਺ݴޠʹରԠ͍ͯ͠Δ SC KBWB

αʔόଆͷ࢖͍ํ ؆ུ൛ import pb "path/to/pb.go" type server struct{} func (s *server) Find( ctx context.Context, in *pb.FindRequest ) (*pb.FindResponse, error) { user := db.Find(&user) out := &pb.FindResponse{name: user.name} return out, nil } s := grpc.NewServer() pb.RegisterUserServer(s, &server{}) s.Serve(lis) server/main.go

import pb "path/to/pb.go" type server struct{} func (s *server) Find( ctx context.Context, in *pb.FindRequest ) (*pb.FindResponse, error) { user := db.Find(&user) out := &pb.FindResponse{name: user.name} return out, nil } s := grpc.NewServer() pb.RegisterUserServer(s, &server{}) s.Serve(lis) αʔόଆͷ࢖͍ํ ؆ུ൛ server/main.go %#͔Β஋Λ औಘͯ͠ฦ͢ αʔόͷ্ཱͪ͛

ΫϥΠΞϯτଆͷ࢖͍ํ ؆ུ൛ import pb "path/to/pb.go" c := pb.NewUserClient(conn) req := &pb.FindRequest{ id: 1, } resp, err := c.Find(context.Background(), req) if err != nil { log.Fatal(err) } log.Println("Name: ", resp.name) // #=> Name: alice client/main.go

ΫϥΠΞϯτଆͷ࢖͍ํ ؆ུ൛ import pb "path/to/pb.go" c := pb.NewUserClient(conn) req := &pb.FindRequest{ Name: "alice", } resp, err := c.Find(context.Background(), req) if err != nil { log.Fatal(err) } log.Println("Name: ", resp.name) // #=> Name: alice client/main.go αʔόଆͷFind()ͷฦΓ஋

ࠓ೔ͷ·ͱΊ H31$ͬͯͳʹʁ ˠ(PPHMF͕࡞ͬͨ31$ϑϨʔϜϫʔΫ 31$ͬͯͳʹʁ ˠΫϥΠΞϯτ͔ΒαʔόͷϝιουΛݺͿ H31$Λ࢖͏ʹ͸ʁ ˠQSPUPϑΝΠϧΛॻ͍ͯΠϯλʔϑΣʔεΛ ɹੜ੒͢Δ ˠੜ੒͞ΕͨΠϯλʔϑΣʔεΛ࢖࣮ͬͯ૷͢Δ