Go/GAEで作る金融システム / Finance system made with Go and GAE

https://logmitechlive.connpass.com/event/100619/

Transcript

1. Go/GAEͰ࡞Δ ۚ༥γεςϜ גࣜձࣾωΫετΧϨϯγʔ
2. Agenda • ձࣾʹ͍ͭͯ • 4ͭͷʮ͍͍ͧʯ - Google App Engine(GAE)͸͍͍ͧ - Stackdriver Logging͸͍͍ͧ - Protocol Buffers͸͍͍ͧ - Golang͸͍͍ͧ
3. ձࣾʹ͍ͭͯ
4. גࣜձࣾ ωΫετΧϨϯγʔ
6. Ӷҙ੡࡞தʂ
7. Ծ૝௨՟ަ׵ۀ
8. ϒϩοΫνΣʔϯ
10. ۚ༥
11. ͓٬༷ͷ͓ۚΛ ͓༬͔Γ͢Δ
12. ߴ͍҆શੑ
13. ۀքͷྲྀΕ͸ૣ͍
14. ߴ଎ͳ։ൃ͕ ٻΊΒΕΔ
15. Server Side CONCEPT
16. Environment is Easy Code is Simple
17. ؀ڥ͸؆୯ʹ ίʔυ͸୯७ʹ
18. ࢖༻ٕज़ • Google Cloud Platform - Google App Engine - Cloud SQL - Datastore - Cloud Functions • Golang - ϝΠϯͱͳΔϩδοΫ • Node.js - Cloud FunctionsͰͷϩάૢ࡞
19. ࢖༻ٕज़ • Google Cloud Platform - Google App Engine - Cloud SQL - Datastore - Cloud Functions • Golang - ϝΠϯͱͳΔϩδοΫ • Node.js - Cloud FunctionsͰͷϩάૢ࡞
20. ࢖༻ٕज़ • Google Cloud Platform - Google App Engine - Cloud SQL - Datastore - Cloud Functions • Golang - ϝΠϯͱͳΔϩδοΫ • Node.js - Cloud FunctionsͰͷϩάૢ࡞ &BTZ
21. ࢖༻ٕज़ • Google Cloud Platform - Google App Engine - Cloud SQL - Datastore - Cloud Functions • Golang - ϝΠϯͱͳΔϩδοΫ • Node.js - Cloud FunctionsͰͷϩάૢ࡞
22. ࢖༻ٕज़ • Google Cloud Platform - Google App Engine - Cloud SQL - Datastore - Cloud Functions • Golang - ϝΠϯͱͳΔϩδοΫ • Node.js - Cloud FunctionsͰͷϩάૢ࡞ 4JNQMF
23. ։ൃதʹൃݟͨ͠
24. ʮ˓˓͸͍͍ͧʯ
25. 4ͭͷʮ͍͍ͧʯ • Google App Engine(GAE)͸͍͍ͧ • Stackdriver Logging͸͍͍ͧ • Protocol Buffers͸͍͍ͧ • Golang͸͍͍ͧ
26. Google App Engine(GAE)͸ ͍͍ͧ
27. Google App Engine • Google͕ఏڙ͍ͯ͠ΔPaaS • Python, Java, Node.js, PHP, Goʹඪ४ͰରԠ • ඇৗʹߴ͍Մ༻ੑ
28. What is “͍͍ͧ”?
29. ָ
30. ΠϯϑϥߏஙͰͷ՝୊ • Blue/GreenσϓϩΠ͕࣮ݱͰ͖Δ͔ • ద੾ʹεέʔϧΞ΢τͰ͖Δ͔ • ηΩϡϦςΟʹ໰୊͕ͳ͍͔
31. ΠϯϑϥߏஙͰͷ՝୊ • Blue/GreenσϓϩΠ͕࣮ݱͰ͖Δ͔ - GAEΛ࢖͏ͱղܾ • ద੾ʹεέʔϧΞ΢τͰ͖Δ͔ - GAEΛ࢖͏ͱղܾ • ηΩϡϦςΟʹ໰୊͕ͳ͍͔ - GAEΛ࢖͏ͱ෦෼తʹղܾ
32. GAEͷߏ଄ ("&
33. GAEͷߏ଄ ("& ϓϩδΣΫτʹͭ
34. GAEͷߏ଄ ("& "1* ʮ4FSWJDFʯͱ͍͏୯Ґ
35. GAEͷߏ଄ ("& "1* runtime: go api_version: go1.9 service: api handlers: - url: /.* secure: always script: _go_app
36. GAEͷߏ଄ ("& "1* ໾ׂ͝ͱʹ෼ׂ
37. GAEͷߏ଄ ("& "1* "ENJO
38. GAEͷߏ଄ ("& "1* "ENJO #BUDI
39. GAEͷߏ଄ ("& "1* ࣗಈͰ63-͕ৼΒΕΔ api-dot-project.appspot.com
40. GAEͷߏ଄ ("& "1* ࣗ෼Ͱ63-Λ
    ৼΔ͜ͱ΋Ͱ͖Δ
41. GAEͷߏ଄ ("& "1* WFSTJPO ʮ7FSTJPOʯͱ͍͏୯Ґ
    ͜ͷ୯ҐͰσϓϩΠ͢Δ
    
42. GAEͷߏ଄ ("& "1* WFSTJPO WFSTJPO αʔϏεͷதʹ
    ෳ਺ͷόʔδϣϯ͕͋Δ
43. GAEͷߏ଄ ("& "1* WFSTJPO WFSTJPO ࣗಈͰ63-͕ৼΒΕΔ version1-dot-api-dot- project.appspot.com
44. GAEͷߏ଄ ("& "1* WFSTJPO WFSTJPO 7FSTJPOຖʹ
 τϥϑΟοΫΛ੍ޚ͢Δ
45. GAEͷߏ଄ ("& "1* WFSTJPO WFSTJPO τϥϑΟοΫ
46. GAEͷߏ଄ ("& "1* WFSTJPO WFSTJPO τϥϑΟοΫ
47. GAEͷߏ଄ ("& "1* WFSTJPO WFSTJPO τϥϑΟοΫ
48. GAEͷߏ଄ ("& "1* WFSTJPO WFSTJPO ʮ*OTUBODFʯͱ͍͏୯Ґ
    ͜ͷ୯ҐͰॲཧ͞ΕΔ
49. GAEͷߏ଄ ("& "1* WFSTJPO WFSTJPO
50. GAEͷߏ଄ ("& "1* WFSTJPO WFSTJPO େ͖͍τϥϑΟοΫ
51. GAEͷߏ଄ ("& "1* WFSTJPO WFSTJPO େ͖͍τϥϑΟοΫ
52. GAEͷߏ଄ ("& "1* WFSTJPO WFSTJPO খ͍͞τϥϑΟοΫ
53. ΠϯϑϥߏஙͰͷ՝୊ • Blue/GreenσϓϩΠ͕࣮ݱͰ͖Δ͔ - GAEΛ࢖͏ͱղܾ • ద੾ʹεέʔϧΞ΢τͰ͖Δ͔ - GAEΛ࢖͏ͱղܾ • ηΩϡϦςΟʹ໰୊͕ͳ͍͔ - GAEΛ࢖͏ͱ෦෼తʹղܾ
54. Blue/GreenσϓϩΠ • GAEͷόʔδϣϯͷػೳͰղܾ • τϥϑΟοΫͷ੾Γସ͑͸Graceful • ϝϯς༻όʔδϣϯࣄલʹσϓϩΠ͓͚ͯ͠͹
 ϝϯς੾Γସ͑΋Easy
55. εέʔϧΠϯ/Ξ΢τ • ઃఆ͓͚͑ͯ͞͠͹উखʹ΍ͬͯ͘ΕΔ - Goͷ৔߹্ཱ͕ͪΓʹ਺ेϛϦඵ • εέʔϧΞ΢τ΋2छྨ͋Δ - େྔͷϦΫΤετͷͨΊͷAutomatic - όον౳௕͍ॲཧͷͨΊͷBasic
56. ηΩϡϦςΟ • Πϯελϯε΁ͷ৵ೖ͸جຊతʹ͸ෆՄೳ • DDoS΋͋Δఔ౓·Ͱ͸GAEͰ΍ͬͯ͘ΕΔ • ϛυϧ΢ΣΞͷ੬ऑੑ໰୊͕ѹ౗తʹগͳ͍ - Google͕উखʹରԠͯ͘͠ΕΔ • ίʔυͷηΩϡϦςΟ͸ผ
57. ΠϯϑϥߏஙͰ ೰·ͳ͍͍ͯ͘ʂ
58. Google App Engine(GAE)͸ ͍͍ͧ
59. Stackdriver Logging͸͍͍ͧ
60. Stackdriver Logging • ϑϧϚωʔδυͳϩΪϯάαʔϏε • GCPͰग़ྗ͞ΕΔϩά͕શͯू໿͞ΕΔ • Pub/Sub(Queue)ʹ؆୯ʹྲྀͤΔ - Ճ޻΍௨஌ָ͕ • ϑΟϧλػೳ • GCPͰग़ྗ͞ΕΔϩά͕
 શͯू໿͞ΕΔ
61. What is “͍͍ͧ”?
62. GCPͰग़ྗ͞ΕΔ ϩά͕શͯू໿ ͞ΕΔ(3ճ໨)
63. (ࣗ෼͕GCPΛ ৮ͬͯҰ൪ײಈͨ͠ αʔϏε)
70. Կ΋ͯ͠ͳ͍ʂʂʂ
82. ϩάऩूΛ ߟ͑ͳ͍͍ͯ͘ʂʂ
83. Stackdriver Logging͸͍͍ͧ
84. Protocol Buffers͸ ͍͍ͧ
85. ಥવͰ͕࣭͢໰Ͱ͢
86. APIυΩϡϝϯτ Ͳ͏ͯ͠·͔͢ʁ
87. ࣾ಺Wiki
88. Swagger Blueprint
89. JSON Schema
90. ϓϩδΣΫτͷ README
91. ΋͏1࣭ͭ໰Ͱ͢
92. ϝϯςφϯε ͞Εͯ·͔͢……?
93. APIυΩϡϝϯτͷ ՝୊
94. ࣮૷ͱͷဃ཭
95. ࣮૷ͱͷဃ཭ • υΩϡϝϯτΛॻ͔ͳͯ͘΋࣮૷͕Ͱ͖Δ • ࣮૷ͷมߋʹυΩϡϝϯτ͕௥ै͠ͳ͍ • υΩϡϝϯτΛهड़͢Δπʔϧͷशಘίετ • ࣮ࡍʹΫϥΠΞϯτͱαʔό͕΍ΓऔΓΛ
 ͠ͳ͍ͱҧ͍ʹؾ͚ͮͳ͍
96. Protocol Buffers
97. Protocol Buffers • Google͕։ൃΛ͍ͯ͠Δ
 ΠϯλʔϑΣʔεఆٛݴޠ(IDL) • γϯϓϧͰߴ଎ • ओཁͳݴޠʹରԠ͍ͯ͠Δ - Golang - Java - Swfit - Javascript(TypeScript)
98. gRPC ≠ Protocol Buffers
99. gRPC HTTP TCP HTTP2 Protocol Buffers JSON XML
100. Protocol Buffers on HTTP
101. 4FSWFS $MJFOU {“msg”: “message”} +40/ )551
102. 4FSWFS $MJFOU 010100101001… #JOBSZ )551
103. Protocol Buffers ͷ ߏ଄
104. syntax = "proto3"; package echo; option go_package = "pb"; option java_package = ""; option swift_prefix = ""; message EchoRequest { string msg = 1; } message EchoResponse { string echo_msg = 1; } service EchoService { rpc Echo(EchoRequest) returns (EchoResponse) {} } echo.proto
105. syntax = "proto3"; package echo; option go_package = "pb"; option java_package = ""; option swift_prefix = ""; message EchoRequest { string msg = 1; } message EchoResponse { string echo_msg = 1; } service EchoService { rpc Echo(EchoRequest) returns (EchoResponse) {} } echo.proto
106. syntax = "proto3"; package echo; option go_package = "pb"; option java_package = ""; option swift_prefix = ""; message EchoRequest { string msg = 1; } message EchoResponse { string echo_msg = 1; } service EchoService { rpc Echo(EchoRequest) returns (EchoResponse) {} } echo.proto
107. syntax = "proto3"; package echo; option go_package = "pb"; option java_package = ""; option swift_prefix = ""; message EchoRequest { string msg = 1; } message EchoResponse { string echo_msg = 1; } service EchoService { rpc Echo(EchoRequest) returns (EchoResponse) {} } echo.proto
108. syntax = "proto3"; package echo; option go_package = "pb"; option java_package = ""; option swift_prefix = ""; message EchoRequest { string msg = 1; } message EchoResponse { string echo_msg = 1; } service EchoService { rpc Echo(EchoRequest) returns (EchoResponse) {} } echo.proto
109. $ protoc \ —go_out=plugins=grpc:.\ *.proto
110. type EchoRequest struct { Msg string `protobuf:"bytes,1,opt,name=msg" json:"msg,omitempty"` XXX_NoUnkeyedLiteral struct{} `json:"-"` XXX_unrecognized []byte `json:"-"` XXX_sizecache int32 `json:"-"` } type EchoServiceServer interface { Echo(context.Context, *EchoRequest) (*EchoResponse, error) } echo.pb.go
111. type EchoRequest struct { Msg string `protobuf:"bytes,1,opt,name=msg" json:"msg,omitempty"` XXX_NoUnkeyedLiteral struct{} `json:"-"` XXX_unrecognized []byte `json:"-"` XXX_sizecache int32 `json:"-"` } type EchoServiceServer interface { Echo(context.Context, *EchoRequest) (*EchoResponse, error) } echo.pb.go
112. type EchoRequest struct { Msg string `protobuf:"bytes,1,opt,name=msg" json:"msg,omitempty"` XXX_NoUnkeyedLiteral struct{} `json:"-"` XXX_unrecognized []byte `json:"-"` XXX_sizecache int32 `json:"-"` } type EchoServiceServer interface { Echo(context.Context, *EchoRequest) (*EchoResponse, error) } echo.pb.go
113. type EchoRequest struct { Msg string `protobuf:"bytes,1,opt,name=msg" json:"msg,omitempty"` XXX_NoUnkeyedLiteral struct{} `json:"-"` XXX_unrecognized []byte `json:"-"` XXX_sizecache int32 `json:"-"` } type EchoServiceServer interface { Echo(context.Context, *EchoRequest) (*EchoResponse, error) } echo.pb.go
114. public final class Echo { private Echo() {} public static final class EchoRequest extends com.google.protobuf.GeneratedMessageV3 implements { // @@protoc_insertion_point(message_implements:echo.EchoRequest) private EchoRequest() { msg_ = ""; } public static final int MSG_FIELD_NUMBER = 1; private volatile java.lang.Object msg_; public java.lang.String getMsg() { } } } Echo.java
115. public final class Echo { private Echo() {} public static final class EchoRequest extends com.google.protobuf.GeneratedMessageV3 implements { // @@protoc_insertion_point(message_implements:echo.EchoRequest) private EchoRequest() { msg_ = ""; } public static final int MSG_FIELD_NUMBER = 1; private volatile java.lang.Object msg_; public java.lang.String getMsg() { } } } Echo.java
116. public final class Echo { private Echo() {} public static final class EchoRequest extends com.google.protobuf.GeneratedMessageV3 implements { // @@protoc_insertion_point(message_implements:echo.EchoRequest) private EchoRequest() { msg_ = ""; } public static final int MSG_FIELD_NUMBER = 1; private volatile java.lang.Object msg_; public java.lang.String getMsg() { } } } Echo.java
117. ͜ΕΛ֤ݴޠͷ ϥΠϒϥϦΛ௨ͯ͠ Binaryʹ͢Δ
118. What is “͍͍ͧ”?
119. υΩϡϝϯτʹ࣮૷
120. Protocol Buffers • ه๏͕Θ͔Γ΍͍͢ • σʔλͷදݱํ๏͕๛͔ - int, double, repeated(Array), Map… • ֤ݴޠͷίʔυͦͷ΋ͷΛੜ੒ͯ͠࢖͏ - มߋ͕͋ͬͨ৔߹Ϗϧυ࣌ʹؾ͚ͮΔ
121. syntax = "proto3"; package echo; option go_package = "pb"; option java_package = ""; option swift_prefix = ""; message EchoRequest { string msg = 1; } message EchoResponse { string echo_msg = 1; } service EchoService { rpc Echo(EchoRequest) returns (EchoResponse) {} } echo.proto
122. syntax = "proto3"; package echo; option go_package = "pb"; option java_package = ""; option swift_prefix = ""; message EchoRequest { string msg = 1; } message EchoResponse { string echo_msg = 1; } service EchoService { rpc Echo(EchoRequest) returns (EchoResponse) {} } echo.proto
123. syntax = "proto3"; package echo; option go_package = "pb"; option java_package = ""; option swift_prefix = ""; message EchoRequest { string msg = 1; } message EchoResponse { string echo_msg = 1; } service EchoService { rpc Echo(EchoRequest) returns (EchoResponse) {} } echo.proto
124. type EchoRequest struct { Msg string `protobuf:"bytes,1,opt,name=msg" json:"msg,omitempty"` XXX_NoUnkeyedLiteral struct{} `json:"-"` XXX_unrecognized []byte `json:"-"` XXX_sizecache int32 `json:"-"` } type EchoServiceServer interface { Echo(context.Context, *EchoRequest) (*EchoResponse, error) } echo.pb.go
125. type EchoRequest struct { Msg string `protobuf:"bytes,1,opt,name=msg" json:"msg,omitempty"` XXX_NoUnkeyedLiteral struct{} `json:"-"` XXX_unrecognized []byte `json:"-"` XXX_sizecache int32 `json:"-"` } type EchoServiceServer interface { Echo(context.Context, *EchoRequest) (*EchoResponse, error) } echo.pb.go
126. type EchoRequest struct { Msg string `protobuf:"bytes,1,opt,name=msg" json:"msg,omitempty"` XXX_NoUnkeyedLiteral struct{} `json:"-"` XXX_unrecognized []byte `json:"-"` XXX_sizecache int32 `json:"-"` } type EchoServiceServer interface { Echo(context.Context, *EchoRequest) (*EchoResponse, error) } echo.pb.go
127. APIυΩϡϝϯτΛ Protocol Buffersʹ دͤΒΕΔʂʂ
128. APIυΩϡϝϯτͱ ࣮૷ͷဃ཭Λ ؾʹ͠ͳ͍͍ͯ͘ʂ
129. Protocol Buffers͸ ͍͍ͧ
130. Golang͸͍͍ͧ
131. What is “͍͍ͧ”?
132. γϯϓϧ
133. γϯϓϧͷ͍͍ͱ͜Ζ • ݴޠ࢓༷ͷཧղ͕༰қ • ฒߦॲཧͷѻ͍ - goroutine - channel • γϯϓϧͰ͋Δ͕Ώ͑ͷϏϧυ࣌ؒͷ୹͞
134. ͑ʁ
135. ฉ͖๞͖ͨʁ
136. ۩ମతͳൺֱ
137. func f(li []int) []int { ret := make([]int, 0) for _, n := range li { if n%2 == 0 { ret = append(ret, n) } } for i := range ret { ret[i] = ret[i] * 2 } return ret } Golang li.filter(n => n % 2 === 0) .map(n => n * 2) Javascript
138. func f(li []int) []int { ret := make([]int, 0) for _, n := range li { if n%2 == 0 { ret = append(ret, n) } } for i := range ret { ret[i] = ret[i] * 2 } return ret } Golang li.filter(n => n % 2 === 0) .map(n => n * 2) Javascript ಡΈ΍͍͢ͷ͸Ͳͬͪʁ
139. func f(li []int) []int { ret := make([]int, 0) for _, n := range li { if n%2 == 0 { ret = append(ret, n) } } for i := range ret { ret[i] = ret[i] * 2 } return ret } Golang li.filter(n => n % 2 === 0) .map(n => n * 2) Javascript ੜ࢈ੑ͕ߴ͍ͷ͸ʁ
140. func f(li []int) []int { ret := make([]int, 0) for _, n := range li { if n%2 == 0 { ret = append(ret, n) } } for i := range ret { ret[i] = ret[i] * 2 } return ret } Golang li.filter(n => n % 2 === 0) .map(n => n * 2) Javascript ࣮ߦͷޮ཰͕͍͍ͷ͸ʁ
141. func f(li []int) []int { ret := make([]int, 0) for _, n := range li { if n%2 == 0 { ret = append(ret, n) } } for i := range ret { ret[i] = ret[i] * 2 } return ret } Golang li.filter(n => n % 2 === 0) .map(n => n * 2) Javascript ίϯύΠϥ͕ղऍ͠΍͍͢ͷ͸ʁ
142. ݴ͍͍ͨ͜ͱ
143. ͲͬͪͰ΋͍͍
144. ίʔυʹ͸ ”ҙਤ”Λ දݱ͢Δ΂͖
145. ίʔυͷҙਤ • ͲΜͳه๏Ͱ͋ͬͯ΋ҙਤ͕ॏཁ • intͷ഑ྻͷۮ਺ͷ஋Λ2ഒʹ͢Δҙਤ͸Կ͔ʁ - ͨͩͷ਺஋ܭࢉ - UserͷεςʔλεͷભҠ - ళฮͷStarͷഒ཰
146. func f(li []int) []int { ret := make([]int, 0) for _, n := range li { if n%2 == 0 { ret = append(ret, n) } } for i := range ret { ret[i] = ret[i] * 2 } return ret } Golang li.filter(n => n % 2 === 0) .map(n => n * 2) Javascript
147. func f(li []int) []int { ret := make([]int, 0) for _, n := range li { if n%2 == 0 { ret = append(ret, n) } } for i := range ret { ret[i] = ret[i] * 2 } return ret } Golang li.filter(n => n % 2 === 0) .map(n => n * 2) Javascript ͲͪΒ΋ҙਤ͕ͳ͍
148. func f(li []int) []int { ret := make([]int, 0) for _, n := range li { if n%2 == 0 { ret = append(ret, n) } } for i := range ret { ret[i] = ret[i] * 2 } return ret } Golang li.filter(n => n % 2 === 0) .map(n => n * 2) Javascript ͲͬͪͰ΋͍͍
149. ͡Ό͋ͳΜͰ Golang?
150. ϏδωεϩδοΫʹ ूத͠΍͍͢
151. Javascript • ഑ྻͷཁૉΛಛఆͷ৚݅ͰߜΓ͍ͨʂ - filter͕͋ΔΑʂ • ഑ྻͷཁૉશͯΛૢ࡞Λ͍ͨ͠ʂ - map͕͋ΔΑʂ • ഑ྻͷཁૉ͢΂ͯΛ࢖ͬͯ݁ՌΛ࡞Γ͍ͨʂ - reduce͕͋ΔΑʂ
152. Javascript • ഑ྻͷཁૉΛಛఆͷ৚݅ͰߜΓ͍ͨʂ - filter͕͋ΔΑʂ • ഑ྻͷཁૉશͯΛૢ࡞Λ͍ͨ͠ʂ - map͕͋ΔΑʂ • ഑ྻͷཁૉ͢΂ͯΛ࢖ͬͯ݁ՌΛ࡞Γ͍ͨʂ - reduce͕͋ΔΑʂ Ͱ΋શ෦GPSϧʔϓͰ΋࣮ݱͰ͖ΔΑʂ
153. Golang • ഑ྻͷཁૉΛಛఆͷ৚݅ͰߜΓ͍ͨʂ - forͱifΛ࢖͓͏ • ഑ྻͷཁૉશͯΛૢ࡞Λ͍ͨ͠ʂ - forΛ࢖͓͏ • ഑ྻͷཁૉ͢΂ͯΛ࢖ͬͯ݁ՌΛ࡞Γ͍ͨʂ - forΛ࢖͓͏
154. ۚ༥γεςϜ • ۚ༥ۀքಛ༗ͷυϝΠϯ஌͕ࣝ๲େ • ΤϯδχΞ͸ۚ༥ͷઐ໳ՈͰ͸ͳ͍ • υϝΠϯ஌ࣝͷͨΊʹ࠷େݶ࣌ؒΛ࢖͍͍ͨ - ۚ༥ͷ஌ࣝͷΠϯϓοτ - υϝΠϯΤΩεύʔτͱͷ
 ίϛϡχέʔγϣϯ
155. ΞϓϦέʔγϣϯΛ ॻ͘͜ͱʹ ूதͰ͖Δʂ
156. Golang͸͍͍ͧ
157. 4ͭͷʮ͍͍ͧʯ • Google App Engine(GAE)͸͍͍ͧ • Stackdriver Logging͸͍͍ͧ • Protocol Buffers͸͍͍ͧ • Golang͸͍͍ͧ
158. ࠙਌ձͰ ͓࿩͠·͠ΐ͏ʂ
159. Ұॹʹಇ͍ͯ ͘ΕΔਓ ืूதʂʂʂ