Main speech by Oleksiy Kurnenkov, Core Infra Lead at OnApp, during 8th #pivorak Lviv Ruby MeetUp.

1. Broker
Adventure through architecture patterns

2. by Oleksiy Kurnenkov
Core Infra Lead @ OnApp

3. Local VS Distributed
systems

4. System without a Broker
Local Services

5. Direct connection.
Clients feel happy

6. Direct connection.

7. System without a Broker
Distributed Services

8. No Broker. Direct connection. Service OK
Clients feel happy

9. No Broker. Direct connection. Service OK

10. No Broker. Direct connection. Service not OK
Service is Unavailable
Clients get broken

11. No Broker. Direct connection. Service not OK

12. No Broker. Direct connection. Service not OK
Service API has been changed
Clients get broken

13. No Broker. Direct connection. Service not OK

14. No Broker. Direct connection. Service not OK
Service has been rewritten in Java
Ruby Clients get confused

15. No Broker. Direct connection. Service not OK

16. No Broker. Direct connection. Service not OK
Service has been moved
Clients feel really bad

17. No Broker. Direct connection. Service not OK

18. What is a Broker ?

19. What is a Broker ?
A Mediator

20. Why using Broker ?

21. Why using Broker ?
you might not …

22. Remember about clients?

23. But You want them to use your system

24. OK. So:
Why using
Broker ?
Reliability

25. OK. So:
Why using
Broker ?
Reliability
Availability

26. OK. So:
Why using
Broker ?
Reliability
Availability
Maintainability

27. OK. So:
Why using
Broker ?
Reliability
Availability
Maintainability
Scalability

28. OK. So:
Why using
Broker ?
Reliability
Availability
Maintainability
Scalability
Modifiability

29. Components Decoupling
Broker’s Objectives

30. Components Decoupling
Service Registration
Broker’s Objectives

31. Components Decoupling
Service Registration
Service Discovery
Broker’s Objectives

32. System with a Broker
Distributed Services

33. Broker
constituent parts:

34. Broker
constituent parts:
Client Side Broker

35. Broker
constituent parts:
Client Side Broker
Broker Core

36. Broker
constituent parts:
Client Side Broker
Broker Core
Server Side Broker

37. Indirect connection.

38. Client Side Broker

39. Client Side
Broker
constituent parts:

40. Client Side
Broker
constituent parts:
Client Proxy

41. Client Side
Broker
Client Proxy
Uses Lookup:
locates service
loads API

42. Client Side
Broker
Client Proxy
Uses Lookup:
locates service
loads API
Uses Requestor:
calls API

44. Client Side
Broker
constituent parts:
Client Proxy

45. Client Side
Broker
constituent parts:
Client Proxy
Service Lookup

46. Client Side
Broker
Service Lookup
Uses Repository
Services location
Services’ API

47. Client Side
Broker
constituent parts:
Client Proxy
Service Lookup

48. Client Side
Broker
constituent parts:
Client Proxy
Service Lookup
Requestor

49. Client Side
Broker
Requestor
Uses Strategies to
determine
Client Request Handler
Modifies Request

51. Client Side
Broker
constituent parts:
Client Proxy
Service Lookup
Requestor

52. Broker
constituent parts:
Client Side Broker
Broker Core

53. Broker Core

54. Broker
Core
constituent parts:

55. Broker
Core
constituent parts:
Client Request
Handler

56. Broker
Core
constituent parts:
Client Request
Handler
Middleware

57. Broker
Core
constituent parts:
Client Request
Handler
Middleware
Server Request
Handler

59. Broker
Core
constituent parts:
Client Request
Handler

60. Broker
Core
Client Request Handler
Uses Marshaller

61. Broker
Core
Client Request Handler
Uses Marshaller
Uses Interceptor

62. Broker
Core
Client Request Handler
Uses Marshaller
Uses Interceptor
Uses Middleware

64. Broker
Core
constituent parts:
Client Request
Handler

65. Broker
Core
constituent parts:
Client Request
Handler
Middleware

66. Broker
Core
Middleware
Uses:
other Broker
networking
messaging

67. Broker
Core
constituent parts:
Client Request
Handler
Middleware

68. Broker
Core
constituent parts:
Client Request
Handler
Middleware
Server Request
Handler

69. Broker
Core
Server Request Handler
Uses Middleware

70. Broker
Core
Server Request Handler
Uses Middleware
Uses Unmarshaller

71. Broker
Core
Server Request Handler
Uses Middleware
Uses Unmarshaller
Uses Interceptor

73. Broker
Core
constituent parts:
Client Request
Handler
Middleware
Server Request
Handler

74. Broker
constituent parts:
Client Side Broker
Broker Core

75. Broker
constituent parts:
Client Side Broker
Broker Core
Server Side Broker

76. Server Side Broker

77. Server Side
Broker
constituent parts:

78. Server Side
Broker
constituent parts:
Invoker

79. Server Side
Broker
constituent parts:
Invoker
Lookup

80. Server Side
Broker
constituent parts:
Invoker
Lookup
Server Proxy

81. Server Side
Broker
Invoker
Uses Lookup:
locates service
Uses Server Proxy:
calls real API

82. Server Side
Broker
constituent parts:
Invoker
Lookup

83. Server Side
Broker
Lookup
Uses Local Repository:
locates service

84. Server Side
Broker
constituent parts:
Invoker
Lookup
Server Proxy

85. Server Side
Broker
Server Proxy
Uses Bound Object:
utilizes real
Service

86. Server Side
Broker
constituent parts:
Invoker
Lookup
Server Proxy

88. The Big Picture

93. Live Coding

94. Facade. Proxy. Lookup. Repository.
Business Delegate. Requestor. Request Handler.
Marshaller. Interceptor. Unmarshaller.
Invoker. Bound Object.
Broker. List of Patterns.

95. CORBA
https://en.wikipedia.org/wiki/Common_Object_Request_Broker_Architecture
Pattern Oriented Software Architecture
https://www.dre.vanderbilt.edu/~schmidt/POSA/
Software Architecture In Practice
Useful Links

96. Thank you
QA ?