WAMP as a platform for composite SOA applications and its implementation on Lua

1. WAMP as a platform for composite SOA applications and its implementation on Lua Konstantin Burkalev @KSDaemon

2. Few words about me… 2 • Software architect • 15+ years in IT • Author and host of podcasts: SDCast & RadioJS • Active member of WAMP protocol development group • Author and maintainer of a few WAMP implementations, some of them are written in Lua

3. Talk plan Example of system using WAMP What is WAMP and how it works WAMP as basis for SOA applications Application fields WAMP client in Lua WAMP router in Nginx/Lua 3

4. Task: Smart Home System 4

5. Living room Task: Smart Home System 4

8. Bath room Living room Task: Smart Home System 4

11. Bath room Living room Task: Smart Home System 4 User

13. The temperature sensor detects the temperature raise Bath room Living room Task: Smart Home System 4 User

14. The client is notified Logged in database Bath room Living room Task: Smart Home System 4 User

16. The system turns on air conditioning Bath room Living room Task: Smart Home System 4 User

17. The temperature in the room decreases Bath room Living room Task: Smart Home System 4 User

20. The system turns off the air conditioning Bath room Living room Task: Smart Home System 4 User

21. The system turns off the air conditioning Bath room Living room Task: Smart Home System 4 User

22. The humidity in the bathroom rises Bath room Living room Task: Smart Home System 4 User

25. The system turns on a fan Bath room Living room Task: Smart Home System 4 User

26. The system turns on a fan Bath room Living room Task: Smart Home System 4 User

27. The humidity in the bathroom drops Bath room Living room Task: Smart Home System 4 User

30. The system turns off the fan Bath room Living room Task: Smart Home System 4 User

31. The system turns off the fan Bath room Living room Task: Smart Home System 4 User

32. Bath room Living room Task: Smart Home System 4 User Admin

33. Admin configures threshold values Bath room Living room Task: Smart Home System 4 User Admin

34. Admin searches new devices Bath room Living room Task: Smart Home System 4 User Admin

35. The system informs about found devices Bath room Living room Task: Smart Home System 4 User Admin

36. The system informs about found devices Bath room Living room Task: Smart Home System 4 User Admin

37. Bath room Living room Task: Smart Home System 4 User Admin

38. What is WAMP 5

39. What is WAMP • It stands for "Web Application Messaging Protocol" 5

40. What is WAMP • It stands for "Web Application Messaging Protocol" • Is intended for communication between software components in near real-time 5

41. What is WAMP • It stands for "Web Application Messaging Protocol" • Is intended for communication between software components in near real-time • Provides two mechanisms: • Publish/Subscribe (PubSub) • Remote Procedure Calls (RPC) 5

42. What is WAMP • It stands for "Web Application Messaging Protocol" • Is intended for communication between software components in near real-time • Provides two mechanisms: • Publish/Subscribe (PubSub) • Remote Procedure Calls (RPC) • Bi-directional, ordered 5

43. What is WAMP • It stands for "Web Application Messaging Protocol" • Is intended for communication between software components in near real-time • Provides two mechanisms: • Publish/Subscribe (PubSub) • Remote Procedure Calls (RPC) • Bi-directional, ordered • For communication between clients is required WAMP-router 5

44. Why WAMP? 6

45. Why WAMP? • Open specification 6

46. Why WAMP? • Open specification • Thoughtful Publish / Subscribe 6

47. Why WAMP? • Open specification • Thoughtful Publish / Subscribe • Thoughtful Remote Procedure Calls 6

48. Why WAMP? • Open specification • Thoughtful Publish / Subscribe • Thoughtful Remote Procedure Calls • Message routing 6

49. Why WAMP? • Open specification • Thoughtful Publish / Subscribe • Thoughtful Remote Procedure Calls • Message routing • Cross-platform 6

50. Why WAMP? • Open specification • Thoughtful Publish / Subscribe • Thoughtful Remote Procedure Calls • Message routing • Cross-platform • There are implementations in more than 15 languages 6

51. WAMP alternatives 7 Technology PubSub RPC Routed RPC Web native Cross Language Open Standard WAMP ✔ ✔ ✔ ✔ ✔ ✔ AJAX - ✔ - ✔ ✔ - AMQP ✔ (✔) - - ✔ ✔ Java JMS ✔ - - - - ✔ JSON-RPC - ✔ - ✔ ✔ ✔ MQTT ✔ - - - ✔ ✔ REST - ✔ - ✔ ✔ - SOAP - ✔ - ✔ ✔ ✔ socket.io ✔ - - ✔ - - XMPP ✔ - - ✔ ✔ ✔ ZMQ ✔ - - - ✔ -

52. WAMP: message examples 8

53. WAMP architecture 9

54. WAMP architecture 10 Client. Can provide or consume resources such as subscriptions and RPC.

55. WAMP architecture 11 Router. Deals with authorization and routing messages between clients.

56. WAMP architecture 12 Peer. Can be a client or a router, must have at least one role.

57. WAMP architecture 13 Role. Defines features of the node. There are 4 client roles and 2 roles of the router.

58. WAMP architecture 14 Session. It is necessary for identification and authorization of clients, announce the roles of nodes.

59. WAMP architecture 15 Realm. domain, namespace, single space within which resources and message routing takes place.

60. WAMP architecture 16 Transport. You can use: Websocket, Raw TCP, Unix sockets and even HTTP Long poll.

61. WAMP architecture 17 Serializer. All messages are serialized using JSON/MessagePack/ CBOR. message

62. WAMP architecture 18 Resource identifiers, URI. Required for topics, procedures and errors. For example: Topic: «sensor.events» RPC: «discover.devices» message

63. Basic WAMP concepts 19

64. Basic WAMP concepts • Client. Can provide or consume resources, such as subscriptions and RPC. • Router. Deals with authorization and message routing between clients. • Peer. Can be a client or a router, must have at least one role. • Role. Determines the capabilities of the node. There are 4 client roles and 2 router roles. • Session. It is necessary to identify and authorize clients, announce the role of nodes. • Realm. Domain, namespace, within which messages are routed. • Transport. You can use: WebSockets, Raw TCP, Unix sockets and even HTTP Long poll. • Serializer. Messages are serialized using JSON / MessagePack / CBOR / etc. • Resource identifiers, URIs. Required for topics, procedures and errors. 19

65. WAMP: Features 20

66. WAMP: Features • Basic profile: basic features of RPC and PubSub 20

67. WAMP: Features • Basic profile: basic features of RPC and PubSub • Advanced profile: 20

68. WAMP: Features • Basic profile: basic features of RPC and PubSub • Advanced profile: • Challenge-Response Authentication • Progressive call results, call timeout, call canceling • Publication / call trust levels • Caller / publisher identification • Pattern based registration / subscription • Shared registration, sharded registration / subscription • Event history • Meta API & Procedure / topic reflection 20

69. WAMP: session establishment 21 Client Router Realm

70. WAMP: session establishment 21 HELLO Client Router Realm [1, "homeapp", { "roles": { "publisher": {}, "subscriber": {} } }]

71. WAMP: session establishment 21 HELLO WELCOME Client Router Realm [2, 9129137332, { "roles": { "broker": {} } }]

72. WAMP: session establishment 21 HELLO WELCOME ABORT Client Router Realm [3, {"message": "The realm does not exist."}, "wamp.error.no_such_realm"]

73. WAMP: session establishment 21 HELLO WELCOME GOODBYE (init by client) ABORT Client Router Realm [6, {"message": "The host is shutting down now."}, "wamp.error.system_shutdown"]

74. WAMP: session establishment 21 HELLO WELCOME GOODBYE (init by client) ABORT GOODBYE Client Router Realm [6, {}, "wamp.error.goodbye_and_out"]

75. WAMP: session establishment 21 HELLO WELCOME GOODBYE (init by client) ABORT GOODBYE GOODBYE (init by router) Client Router Realm [6, {}, "wamp.error.close_realm"]

76. WAMP: session establishment 21 HELLO WELCOME GOODBYE (init by client) ABORT GOODBYE GOODBYE GOODBYE (init by router) Client Router Realm [6, {}, "wamp.error.goodbye_and_out"]

77. WAMP: session establishment 21 HELLO WELCOME GOODBYE (init by client) ABORT GOODBYE GOODBYE GOODBYE (init by router) Client Router Realm

78. WAMP: Publish / Subscribe 22 Publisher Broker Subscriber Realm

79. WAMP: Publish / Subscribe 22 SUBSCRIBE Publisher Broker Subscriber Realm [32, 713845233, {}, "sensor.events"]

80. WAMP: Publish / Subscribe 22 SUBSCRIBE SUBSCRIBED Publisher Broker Subscriber Realm [33, 713845233, 5512315355]

81. WAMP: Publish / Subscribe 22 SUBSCRIBE SUBSCRIBED ERROR Publisher Broker Subscriber Realm [8, 32, 713845233, {}, "wamp.error.not_authorized"]

82. WAMP: Publish / Subscribe 22 SUBSCRIBE SUBSCRIBED ERROR PUBLISH Publisher Broker Subscriber Realm [16, 239714735, {}, "sensor.events", [], {"sensorId ": 25, "temp": 27}]

83. WAMP: Publish / Subscribe 22 SUBSCRIBE SUBSCRIBED ERROR PUBLISH PUBLISHED Publisher Broker Subscriber Realm [17, 239714735, 4429313566]

84. WAMP: Publish / Subscribe 22 SUBSCRIBE SUBSCRIBED ERROR PUBLISH PUBLISHED ERROR Publisher Broker Subscriber Realm [8, 16, 239714735, {}, "wamp.error.not_authorized"]

85. WAMP: Publish / Subscribe 22 SUBSCRIBE SUBSCRIBED ERROR PUBLISH PUBLISHED ERROR EVENT Publisher Broker Subscriber Realm [36, 5512315355, 4429313566, {}, [], {"sensorId ": 25, "temp": 27}]

86. WAMP: Publish / Subscribe 22 SUBSCRIBE SUBSCRIBED UNSUBSCRIBE ERROR PUBLISH PUBLISHED ERROR EVENT Publisher Broker Subscriber Realm [34, 85346237, 5512315355]

87. WAMP: Publish / Subscribe 22 SUBSCRIBE SUBSCRIBED UNSUBSCRIBE UNSUBSCRIBED ERROR PUBLISH PUBLISHED ERROR EVENT Publisher Broker Subscriber Realm [35, 85346237]

88. WAMP: Publish / Subscribe 22 SUBSCRIBE SUBSCRIBED UNSUBSCRIBE UNSUBSCRIBED ERROR ERROR PUBLISH PUBLISHED ERROR EVENT Publisher Broker Subscriber Realm [8, 34, 85346237, {}, "wamp.error.no_such_subscription"]

89. WAMP: Publish / Subscribe 22 SUBSCRIBE SUBSCRIBED UNSUBSCRIBE UNSUBSCRIBED ERROR ERROR PUBLISH PUBLISHED ERROR EVENT Publisher Broker Subscriber Realm

90. WAMP: Remote Procedure Calls 23 Caller Dealer Callee Realm

91. WAMP: Remote Procedure Calls 23 Caller Dealer Callee REGISTERRealm [64, 25349185, {}, "dcs.fan.control"]

92. WAMP: Remote Procedure Calls 23 Caller Dealer Callee REGISTER REGISTERED Realm [65, 25349185, 2103333224]

93. WAMP: Remote Procedure Calls 23 Caller Dealer Callee REGISTER REGISTERED ERROR Realm [8, 64, 25349185, {}, "wamp.error.procedure_already_exists"]

94. WAMP: Remote Procedure Calls 23 Caller Dealer Callee REGISTER REGISTERED ERROR CALL Realm [48, 7814135, {}, "dcs.fan.control", [true]]

95. WAMP: Remote Procedure Calls 23 Caller Dealer Callee REGISTER REGISTERED ERROR CALL INVOCATION Realm [68, 6131533, 9823528, {}, [true]]

96. WAMP: Remote Procedure Calls 23 Caller Dealer Callee REGISTER REGISTERED ERROR CALL INVOCATION YIELD Realm [70, 6131533, {}]

97. WAMP: Remote Procedure Calls 23 Caller Dealer Callee REGISTER REGISTERED ERROR CALL RESULT INVOCATION YIELD Realm [50, 7814135, {}]

98. WAMP: Remote Procedure Calls 23 Caller Dealer Callee REGISTER REGISTERED ERROR CALL RESULT INVOCATION YIELD ERROR Realm [8, 68, 6131533, {}, "homeapp.error.hardware_not_found"]

99. WAMP: Remote Procedure Calls 23 Caller Dealer Callee REGISTER REGISTERED ERROR CALL RESULT INVOCATION YIELD ERROR ERROR Realm [8, 48, 7814135, {}, "homeapp.error.hardware_not_found"]

100. WAMP: Remote Procedure Calls 23 Caller Dealer Callee REGISTER REGISTERED UNREGISTER ERROR CALL RESULT INVOCATION YIELD ERROR ERROR Realm [66, 788923562, 2103333224]

101. WAMP: Remote Procedure Calls 23 Caller Dealer Callee REGISTER REGISTERED UNREGISTER UNREGISTERED ERROR CALL RESULT INVOCATION YIELD ERROR ERROR Realm [67, 788923562]

102. WAMP: Remote Procedure Calls 23 Caller Dealer Callee REGISTER REGISTERED UNREGISTER UNREGISTERED ERROR ERROR CALL RESULT INVOCATION YIELD ERROR ERROR Realm [8, 66, 788923562, {}, "wamp.error.no_such_registration"]

103. WAMP: Remote Procedure Calls 23 Caller Dealer Callee REGISTER REGISTERED UNREGISTER UNREGISTERED ERROR ERROR CALL RESULT INVOCATION YIELD ERROR ERROR Realm

104. WAMP as a basis for SOA applications 24

105. WAMP as a basis for SOA applications Distributed architecture 24

106. WAMP as a basis for SOA applications Distributed architecture Loose coupling of components 24

107. WAMP as a basis for SOA applications Distributed architecture Loose coupling of components A simple and intuitive interface for interaction 24

108. WAMP as a basis for SOA applications Distributed architecture Loose coupling of components A simple and intuitive interface for interaction Unified Routing 24

109. WAMP as a basis for SOA applications Distributed architecture Loose coupling of components A simple and intuitive interface for interaction Unified Routing Independence from programming language 24

110. WAMP as a basis for SOA applications Distributed architecture Loose coupling of components A simple and intuitive interface for interaction Unified Routing Independence from programming language Re-usability of components 24

111. WAMP as a basis for SOA applications Distributed architecture Loose coupling of components A simple and intuitive interface for interaction Unified Routing Independence from programming language Re-usability of components WAMP satisfies the requirements of SOA 24

112. WAMP as ESB 25 WAMP Router Service Providers Service Providers Service Providers Service Providers Service Providers Consumers Consumers Consumers Consumers Consumers call RPC Subscribe to topics Register RPC Publish events Subscribe to topics Publish events Сервер Сервер Server

113. WAMP in heterogeneous systems 26 WAMP Router File uploader (python) Web Client (js) Backoffice Client (c#) Video processing (c++) Image processing (go) Logger (ruby) External API Gateway Client REST API (nodejs) Mobile Client (swift) Backoffice REST API (Java) DB Mobile Client (java) Realm Realm Realm Сервер Сервер Server

114. WAMP Application fields 27

115. WAMP Application fields 27 Distributed applications with a large number of services

116. WAMP Application fields 27 Distributed applications with a large number of services Smart homes, Smart cities, Internet of things in General

117. WAMP Application fields 27 Distributed applications with a large number of services Smart homes, Smart cities, Internet of things in General Systems with long-running processes

118. WAMP Application fields 27 Distributed applications with a large number of services Smart homes, Smart cities, Internet of things in General Systems with long-running processes Easy modern alternative to XMPP, XMLRPC

119. WAMP Application fields 27 Distributed applications with a large number of services Smart homes, Smart cities, Internet of things in General Systems with long-running processes Easy modern alternative to XMPP, XMLRPC Network multiplayer games

120. WAMP: real projects 28

121. WAMP: real projects • Kadecot API Server. Sony Computer Science Laboratories 28

122. WAMP: real projects • Kadecot API Server. Sony Computer Science Laboratories • ParaView. Parallel Data Analysis and Visualization Application, Kitware 28

123. WAMP: real projects • Kadecot API Server. Sony Computer Science Laboratories • ParaView. Parallel Data Analysis and Visualization Application, Kitware • Record.Evolution. Data-warehouse and Business Intelligence 28

124. WAMP: real projects • Kadecot API Server. Sony Computer Science Laboratories • ParaView. Parallel Data Analysis and Visualization Application, Kitware • Record.Evolution. Data-warehouse and Business Intelligence • SmartME smart city project. MDS Lab at the University of Messina 28

125. WAMP: real projects • Kadecot API Server. Sony Computer Science Laboratories • ParaView. Parallel Data Analysis and Visualization Application, Kitware • Record.Evolution. Data-warehouse and Business Intelligence • SmartME smart city project. MDS Lab at the University of Messina • ButterflyDNS. Web UI frontend for BIND DLZ • Gollard VISION Server Management Subsystem 28

126. Health monitor Nginx Server Management Subsystem 29 WAMP Router Admin App (c#) Shaman RPC: set.network RPC: get.network Publish: status.change RPC: get.status RPC: get.time RPC: set.time

127. Loowy: WAMP client in Lua 30

128. Loowy: WAMP client in Lua 30 • Works in Lua/Luajit environment on top of lua-ev

129. Loowy: WAMP client in Lua 30 • Works in Lua/Luajit environment on top of lua-ev • Supports JSON and Msgpack serializers

130. Loowy: WAMP client in Lua 30 • Works in Lua/Luajit environment on top of lua-ev • Supports JSON and Msgpack serializers • Supports a number of features from Advanced Profile

131. Loowy: WAMP client in Lua 30 • Works in Lua/Luajit environment on top of lua-ev • Supports JSON and Msgpack serializers • Supports a number of features from Advanced Profile • Automatic reconnection and re-subscription

132. Loowy: WAMP client in Lua 30 • Works in Lua/Luajit environment on top of lua-ev • Supports JSON and Msgpack serializers • Supports a number of features from Advanced Profile • Automatic reconnection and re-subscription • TODO: Raw socket transport • TODO: Meta API • TODO: Challenge-Response Authorization (WAMP-CRA) • TODO: work on the basis of coroutines

133. Loowy: api calls examples 31 client = loowy.new("ws://localhost/ws/", { realm = "gv" }) client:publish('sensor.events', { sensorId = 12, temperature = 27}) client:subscribe('sensor.events', function(event) -- process received event end) client:call('dcs.fan.control', true, { onSuccess = function() -- fan turned on successfully end, onError = function(err) -- error occurred end })

134. Loowy: Technology stack 32

135. Loowy: Technology stack 32 • Lua 5.1+, Luajit 2.0 • lua-websockets (which uses luasocket under the hood) • lua-ev • lua-rapidjson • lua-MessagePack (optional)

136. Wiola: WAMP router in Lua 33

137. Wiola: WAMP router in Lua • Works on top of Nginx/Lua module 33

138. Wiola: WAMP router in Lua • Works on top of Nginx/Lua module • Uses Redis for runtime storage 33

139. Wiola: WAMP router in Lua • Works on top of Nginx/Lua module • Uses Redis for runtime storage • Supports JSON and Msgpack serializers 33

140. Wiola: WAMP router in Lua • Works on top of Nginx/Lua module • Uses Redis for runtime storage • Supports JSON and Msgpack serializers • Supports a number of features from Advanced Profile 33

141. Wiola: WAMP router in Lua • Works on top of Nginx/Lua module • Uses Redis for runtime storage • Supports JSON and Msgpack serializers • Supports a number of features from Advanced Profile • TODO: Raw socket transport • TODO: Meta API • TODO: lua-resty-postgres 33

142. Wiola: Technology stack 34

143. Wiola: Technology stack 34 • Nginx or OpenResty, simply put lua-nginx-module • lua-resty-websocket • lua-resty-redis • Redis Server • lua-rapidjson • lua-resty-hmac (optional, is required for WAMP-CRA) • lua-MessagePack (optional)

144. Wiola: Nginx config 35 location /ws/ { set $wiola_socket_timeout 10; set $wiola_max_payload_len 65535; lua_check_client_abort on; header_filter_by_lua_file /lib/wiola/headers.lua; content_by_lua_file /lib/wiola/handler.lua; }

145. Nginx Wiola: Common scheme 36 Web Client init_by_lua headers_filter_by_lua content_by_lua Redis Server

146. Wiola: JSON caveats and limitations 37

147. Wiola: JSON caveats and limitations • cJSON 37

148. Wiola: JSON caveats and limitations • cJSON • you cannot specify how to serialize empty tables 37

149. Wiola: JSON caveats and limitations • cJSON • you cannot specify how to serialize empty tables • lua-resty-libcjson 37

150. Wiola: JSON caveats and limitations • cJSON • you cannot specify how to serialize empty tables • lua-resty-libcjson • not able to work with large numbers (int > 32bit) 37

151. Wiola: JSON caveats and limitations • cJSON • you cannot specify how to serialize empty tables • lua-resty-libcjson • not able to work with large numbers (int > 32bit) lua-rapidjson 37

152. Wiola: JSON caveats and limitations • cJSON • you cannot specify how to serialize empty tables • lua-resty-libcjson • not able to work with large numbers (int > 32bit) lua-rapidjson • So far, no new problems have been found :) 37

153. Wiola: Runtime storage options 38

154. Wiola: Runtime storage options 38 • Global variables in memory

155. Wiola: Runtime storage options 38 • Global variables in memory • are created every time on request handler

156. Wiola: Runtime storage options 38 • Global variables in memory • are created every time on request handler • problems with concurrent requests

157. Wiola: Runtime storage options 38 • Global variables in memory • are created every time on request handler • problems with concurrent requests • Module variables loaded in init_by_lua

158. Wiola: Runtime storage options 38 • Global variables in memory • are created every time on request handler • problems with concurrent requests • Module variables loaded in init_by_lua • You can read in all workers

159. Wiola: Runtime storage options 38 • Global variables in memory • are created every time on request handler • problems with concurrent requests • Module variables loaded in init_by_lua • You can read in all workers • But the write, thanks to CoW, will create a copy of the module for the VM

160. Wiola: Runtime storage options 38 • Global variables in memory • are created every time on request handler • problems with concurrent requests • Module variables loaded in init_by_lua • You can read in all workers • But the write, thanks to CoW, will create a copy of the module for the VM • ngx.shared.DICT

161. Wiola: Runtime storage options 38 • Global variables in memory • are created every time on request handler • problems with concurrent requests • Module variables loaded in init_by_lua • You can read in all workers • But the write, thanks to CoW, will create a copy of the module for the VM • ngx.shared.DICT • The size of each dictionary is specified in the config file and can not be changed

162. Wiola: Runtime storage options 38 • Global variables in memory • are created every time on request handler • problems with concurrent requests • Module variables loaded in init_by_lua • You can read in all workers • But the write, thanks to CoW, will create a copy of the module for the VM • ngx.shared.DICT • The size of each dictionary is specified in the config file and can not be changed External storage: Redis, Memcache, PostgreSQL, MySQL and others

163. Wiola: Особенности. lua_code_cache 39

164. Wiola: Особенности. lua_code_cache 39 • lua_code_cache off;

165. Wiola: Особенности. lua_code_cache 39 • lua_code_cache off; • it is convenient to debug the code

166. Wiola: Особенности. lua_code_cache 39 • lua_code_cache off; • it is convenient to debug the code • every require() is executed again in each request

167. Wiola: Особенности. lua_code_cache 39 • lua_code_cache off; • it is convenient to debug the code • every require() is executed again in each request • Even the modules loaded into init_by_lua are re-executed

168. Wiola: Особенности. lua_code_cache 39 • lua_code_cache off; • it is convenient to debug the code • every require() is executed again in each request • Even the modules loaded into init_by_lua are re-executed • lua_code_cache on;

169. Wiola: Особенности. lua_code_cache 39 • lua_code_cache off; • it is convenient to debug the code • every require() is executed again in each request • Even the modules loaded into init_by_lua are re-executed • lua_code_cache on; • for production environment

170. Wiola: Особенности. lua_code_cache 39 • lua_code_cache off; • it is convenient to debug the code • every require() is executed again in each request • Even the modules loaded into init_by_lua are re-executed • lua_code_cache on; • for production environment • each require() is executed once and is cached

171. Wiola: Особенности. lua_code_cache 39 • lua_code_cache off; • it is convenient to debug the code • every require() is executed again in each request • Even the modules loaded into init_by_lua are re-executed • lua_code_cache on; • for production environment • each require() is executed once and is cached • whenever you change the code, you need to reload nginx

172. Wiola: Publication in luarocks, opm 40

173. Wiola: Publication in luarocks, opm 40 • luarocks: there is one part of the dependencies, there is no other:

174. Wiola: Publication in luarocks, opm 40 • luarocks: there is one part of the dependencies, there is no other: - lua-resty-websocket

175. Wiola: Publication in luarocks, opm 40 • luarocks: there is one part of the dependencies, there is no other: - lua-resty-websocket - lua-resty-redis

176. Wiola: Publication in luarocks, opm 40 • luarocks: there is one part of the dependencies, there is no other: - lua-resty-websocket - lua-resty-redis ✓ rapidjson

177. Wiola: Publication in luarocks, opm 40 • luarocks: there is one part of the dependencies, there is no other: - lua-resty-websocket - lua-resty-redis ✓ rapidjson ✓ lua-resty-hmac

178. Wiola: Publication in luarocks, opm 40 • luarocks: there is one part of the dependencies, there is no other: - lua-resty-websocket - lua-resty-redis ✓ rapidjson ✓ lua-resty-hmac ✓ lua-messagepack

179. Wiola: Publication in luarocks, opm 40 • luarocks: there is one part of the dependencies, there is no other: - lua-resty-websocket - lua-resty-redis ✓ rapidjson ✓ lua-resty-hmac ✓ lua-messagepack • opm (OpenResty Package Manager): accurate to "reverse":

180. Wiola: Publication in luarocks, opm 40 • luarocks: there is one part of the dependencies, there is no other: - lua-resty-websocket - lua-resty-redis ✓ rapidjson ✓ lua-resty-hmac ✓ lua-messagepack • opm (OpenResty Package Manager): accurate to "reverse": ✓ lua-resty-websocket

181. Wiola: Publication in luarocks, opm 40 • luarocks: there is one part of the dependencies, there is no other: - lua-resty-websocket - lua-resty-redis ✓ rapidjson ✓ lua-resty-hmac ✓ lua-messagepack • opm (OpenResty Package Manager): accurate to "reverse": ✓ lua-resty-websocket ✓ lua-resty-redis

182. Wiola: Publication in luarocks, opm 40 • luarocks: there is one part of the dependencies, there is no other: - lua-resty-websocket - lua-resty-redis ✓ rapidjson ✓ lua-resty-hmac ✓ lua-messagepack • opm (OpenResty Package Manager): accurate to "reverse": ✓ lua-resty-websocket ✓ lua-resty-redis - rapidjson

183. Wiola: Publication in luarocks, opm 40 • luarocks: there is one part of the dependencies, there is no other: - lua-resty-websocket - lua-resty-redis ✓ rapidjson ✓ lua-resty-hmac ✓ lua-messagepack • opm (OpenResty Package Manager): accurate to "reverse": ✓ lua-resty-websocket ✓ lua-resty-redis - rapidjson ✓ lua-resty-hmac

184. Wiola: Publication in luarocks, opm 40 • luarocks: there is one part of the dependencies, there is no other: - lua-resty-websocket - lua-resty-redis ✓ rapidjson ✓ lua-resty-hmac ✓ lua-messagepack • opm (OpenResty Package Manager): accurate to "reverse": ✓ lua-resty-websocket ✓ lua-resty-redis - rapidjson ✓ lua-resty-hmac - lua-messagepack

185. Useful links about WAMP 41

186. Useful links about WAMP • WAMP main site: http://wamp-proto.org/ • WAMP spec on github: github.com/wamp-proto/wamp-proto • Mailing list: https://groups.google.com/forum/#!forum/wampws • Wiola: https://github.com/KSDaemon/wiola • Loowy: https://github.com/KSDaemon/Loowy • Wampy.js: https://github.com/KSDaemon/wampy.js • Wiola docker image: https://hub.docker.com/r/421p/wiola/ • Crossbar Router: https://crossbar.io/ и https://demo.crossbar.io/ 41

187. WAMP: Conclusion 42

188. WAMP: Conclusion • A simple and open Protocol 42

189. WAMP: Conclusion • A simple and open Protocol • RPC and PubSub in one transport/protocol 42

190. WAMP: Conclusion • A simple and open Protocol • RPC and PubSub in one transport/protocol • Any transport and serialization 42

191. WAMP: Conclusion • A simple and open Protocol • RPC and PubSub in one transport/protocol • Any transport and serialization • Allows you to build distributed applications with loosely coupled components 42

192. WAMP: Conclusion • A simple and open Protocol • RPC and PubSub in one transport/protocol • Any transport and serialization • Allows you to build distributed applications with loosely coupled components • There are implementations in many languages 42

193. WAMP: Conclusion • A simple and open Protocol • RPC and PubSub in one transport/protocol • Any transport and serialization • Allows you to build distributed applications with loosely coupled components • There are implementations in many languages • Open source 42

194. WAMP: Conclusion • A simple and open Protocol • RPC and PubSub in one transport/protocol • Any transport and serialization • Allows you to build distributed applications with loosely coupled components • There are implementations in many languages • Open source • A small but friendly community 42

195. WAMP: Conclusion 43

196. WAMP: Conclusion • Useful architectural solution 43

197. WAMP: Conclusion • Useful architectural solution • A great option for your IoT project! (IMHO: better than MQTT) 43

198. WAMP: Conclusion • Useful architectural solution • A great option for your IoT project! (IMHO: better than MQTT) • Try WAMP: 43

199. WAMP: Conclusion • Useful architectural solution • A great option for your IoT project! (IMHO: better than MQTT) • Try WAMP: • Already have nginx/openresty? — try Wiola (bit.ly/wiola-router) 43

200. WAMP: Conclusion • Useful architectural solution • A great option for your IoT project! (IMHO: better than MQTT) • Try WAMP: • Already have nginx/openresty? — try Wiola (bit.ly/wiola-router) • Are you using a docker? 43

201. WAMP: Conclusion • Useful architectural solution • A great option for your IoT project! (IMHO: better than MQTT) • Try WAMP: • Already have nginx/openresty? — try Wiola (bit.ly/wiola-router) • Are you using a docker? • docker pull 421p/wiola 43

202. WAMP: Conclusion • Useful architectural solution • A great option for your IoT project! (IMHO: better than MQTT) • Try WAMP: • Already have nginx/openresty? — try Wiola (bit.ly/wiola-router) • Are you using a docker? • docker pull 421p/wiola • docker pull crossbario/crossbar 43

203. WAMP: Conclusion • Useful architectural solution • A great option for your IoT project! (IMHO: better than MQTT) • Try WAMP: • Already have nginx/openresty? — try Wiola (bit.ly/wiola-router) • Are you using a docker? • docker pull 421p/wiola • docker pull crossbario/crossbar • WAMP client for every taste and color (wamp-proto.org/implementations/) 43

204. Thank you for attention! And your questions :) 44 Konstantin Burkalev • Mail: kostik@ksdaemon.ru • Twitter: @KSDaemon • GitHub: KSDaemon • Blog: blog.ksdaemon.ru • SDCast: sdcast.ksdaemon.ru