イメージで理解するgRPC

Transcript

1. ΠϝʔδͰཧղ͢Δ
2. ࠓ೔ͷΰʔϧ ɾH31$ͬͯͳʹʁ ɾ31$ͬͯͳʹʁ ɾͲ͏΍࣮ͬͯ૷͢Δͷʁ
3. 
   
   
   
   
   
   
   
   
   
   
   ͬͯͳʹʁ 
4. H31$
   (PPHMF͕࡞ͬͨ31$ϑϨʔϜϫʔΫ
5. 31$ͬͯͳʹʁ
6. 31$
   3FNPUF
   1SPDFEVSF
   $BMM
7. 31$
   DMJFOU͕ࣗ਎ͷϝιουΛ࣮ߦ͢Δײ֮Ͱ TFSWFS্ͷϝιουΛ࣮ߦͰ͖Δ͘͠Έ
8. ͭ·ΓɺͲ͏͍͏͜ͱʁ
9. DMJFOUͱTFSWFSʹಉ໊ϝιου͕͋ͬͯ IUUQTJDPOTDPNJDPOTTFUTFSWFS DMJFOU TFSWFS Find() Find()
10. DMJFOU͕ϝιουΛ࣮ߦ͢Δͱ DMJFOU TFSWFS Find() Find() IUUQTJDPOTDPNJDPOTTFUTFSWFS
11. TFSWFSଆͷಉ໊ϝιου͕࣮ߦ͞Ε DMJFOU TFSWFS Find() Find() SFRVFTU IUUQTJDPOTDPNJDPOTTFUTFSWFS
12. ͦͷฦΓ஋͕DMJFOUଆͷฦΓ஋ʹͳΔ DMJFOU TFSWFS Find() Find() SFRVFTU SFTQPOTF IUUQTJDPOTDPNJDPOTTFUTFSWFS
13. H31$͸͜ͷؒΛ͏·͘΍ͬͯ͘ΕΔ DMJFOU TFSWFS Find() Find() SFRVFTU SFTQPOTF IUUQTJDPOTDPNJDPOTTFUTFSWFS
14. const res = axios.get("/api/v1/users/1") js req := FindRequest({ID: 1}) res, err = user.Find(req) go 3&45 31$ ͜Μͳ࢖͍ํ͕Ͱ͖·͢
15. Ͳ͏΍࣮ͬͯ૷͢Δͷʁ 
16. 31$Λ࣮ݱ͢Δʹ͸ SFRVFTU DMJFOU TFSWFS SFTQPOTF IUUQTJDPOTDPNJDPOTTFUTFSWFS
17. ڞ௨ೝ͕ࣝඞཁ SFRVFTU DMJFOU TFSWFS SFTQPOTF ϝιουͷ໊લ
    ϦΫΤετͷܗࣜ
    Ϩεϙϯεͷܗࣜ IUUQTJDPOTDPNJDPOTTFUTFSWFS
18. ͦΕ͕ɺQSPUPϑΝΠϧ SFRVFTU DMJFOU TFSWFS SFTQPOTF QSPUP IUUQTJDPOTDPNJDPOTTFUTFSWFS
19. QSPUPϑΝΠϧͷྫ service User { rpc Find(FindRequest) returns (FindResponse) {} } message FindRequest { int32 id = 1; } message FindResponse { string name = 1; } user_service.proto
20. QSPUPϑΝΠϧͷྫ user_service.proto ϦΫΤετͷܗࣜ Ϩεϙϯεͷܗࣜ service User { rpc Find(FindRequest) returns (FindResponse) {} } message FindRequest { int32 id = 1; } message FindResponse { string name = 1; }
21. service User { rpc Find(FindRequest) returns (FindResponse) {} } message FindRequest { int32 id = 1; } message FindResponse { string name = 1; } QSPUPϑΝΠϧͷྫ user_service.proto ˢϝιουͷఆٛ
22. QSPUP QCHP ࣍ʹɺΠϯλʔϑΣʔεΛੜ੒͢Δ QSPUPD QSPUPD
    ΠϯλʔϑΣʔεΛੜ੒͢ΔͨΊͷίϚϯυ
23. QSPUP QCHP ࣍ʹɺΠϯλʔϑΣʔεΛੜ੒͢Δ QSPUPD ͍ΖΜͳJOUFSGBDF΍GVOD͕ࣗಈੜ੒ ͞ΕΔɽਓ͸Ұ੾͍͡Βͳ͍
24. ॏཁͳ෦෼͚ͩϐοΫΞοϓ type UserServer interface { Find( context.Context, *FindRequest ) (*FindResponse, error) } user_service.pb.go 
    αʔόଆͷΠϯλʔϑΣʔε αʔόଆ͸͜Εʹ߹ΘͤͯϝιουΛ࣮૷͢Δ
25. ॏཁͳ෦෼͚ͩϐοΫΞοϓ type UserClient interface { Find( ctx context.Context, in *FindRequest, opts ...grpc.CallOption ) (*FindResponse, error) } 
    ΫϥΠΞϯτଆͷΠϯλʔϑΣʔε ΫϥΠΞϯτଆ͸͜Εʹ߹ΘͤͯϝιουΛ࢖͏ user_service.pb.go
26. ॏ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
27. QSPUP QCHP ͪͳΈʹɺෳ਺ݴޠʹରԠ͍ͯ͠Δ SC KBWB
28. 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
29. 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
30. 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
31. 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஋
32. ࠓ೔ͷ·ͱΊ H31$ͬͯͳʹʁ
    ˠ
    (PPHMF͕࡞ͬͨ31$ϑϨʔϜϫʔΫ 31$ͬͯͳʹʁ
    ˠΫϥΠΞϯτ͔ΒαʔόͷϝιουΛݺͿ H31$Λ࢖͏ʹ͸ʁ
    ˠ
    QSPUPϑΝΠϧΛॻ͍ͯΠϯλʔϑΣʔεΛ
    ɹ
    ੜ੒͢Δ
    ˠ
    ੜ੒͞ΕͨΠϯλʔϑΣʔεΛ࢖࣮ͬͯ૷͢Δ