The document discusses various integration styles and messaging patterns for connecting systems and applications. It covers common integration approaches like file transfer, shared databases, and remote procedure invocation. It also describes messaging patterns like producer-consumer, publish-subscribe, and request-reply. Specific messaging patterns are explained in detail like using message routers, translators, aggregators, and scatter-gather for routing messages between systems. The document provides an overview of fundamental integration and messaging concepts.

1. Enterprise Integration
patterns
Johan Aludden
Twitter: johanaludden
Mail: me@johanaludden.com
Blog: johanaludden.com/weblog

2. Integration styles
2

3. Integration styles
• File transfer
2

4. Integration styles
• File transfer
• Shared Database
2

5. Integration styles
• File transfer
• Shared Database
• Remote Procedure Invocation
2

6. Integration styles
• File transfer
• Shared Database
• Remote Procedure Invocation
• Messaging
2

7. Messaging
3

8. Messaging
• Channels
3

9. Messaging
• Channels
• Messages
3

10. Producer Consumer
4

11. Producer Consumer
• Many producers - Many Consumers
4

12. Producer Consumer
• Many producers - Many Consumers
• Message read once
4

13. Producer Consumer
• Many producers - Many Consumers
• Message read once
• Load balancing
4

14. Producer Consumer
• Many producers - Many Consumers
• Message read once
• Load balancing
• Parallelization
4

15. Publish subscribe
5

16. Publish subscribe
• Many Producers - Many Consumers
5

17. Publish subscribe
• Many Producers - Many Consumers
• Message read once per subscriber
5

18. Publish subscribe
• Many Producers - Many Consumers
• Message read once per subscriber
• Broad casting
5

19. Publish subscribe
• Many Producers - Many Consumers
• Message read once per subscriber
• Broad casting
• Different processing
5

20. Channel Types
• Producer Consumer
• Publish Subscribe
Common Properties
• Asynchronous
• One Way Communication
6

21. Document Message
7

22. Document Message
• Send information
7

23. Document Message
• Send information
• Receiver decides what to do
7

24. Document Message
• Send information
• Receiver decides what to do
• Single unit of data
7

25. Command Message
8

26. Command Message
• Send a command
8

27. Command Message
• Send a command
• Sender tells what to do
8

28. Command Message
• Send a command
• Sender tells what to do
• Single Unit of Work
8

29. Message Types
• Document message
• Command message
9

30. Common Patterns
10

31. You want to send a request
and get a reply
11

32. 11

33. Sender Receiver
11

34. Sender Request Receiver
11

35. Sender Request Receiver
11

36. Sender Receiver
11

37. Sender Receiver
11

38. Sender Receiver
Reply
11

39. Sender Receiver
Reply
11

40. Sender Receiver
11

41. Request
ID: 2
Sender Receiver
11

42. Request
ID: 2
Sender Receiver
11

43. Sender Receiver
11

44. Request
ID: 3
Sender Receiver
11

45. Request
ID: 3
Sender Receiver
11

46. Sender Receiver
11

47. Sender Receiver
Reply
ID: 3
11

48. Sender Receiver
Reply
ID: 3
11

49. Sender Receiver
11

50. Sender Receiver
Reply
ID: 2
11

51. Sender Receiver
Reply
ID: 2
11

52. Sender Receiver
11

53. Request - Reply
Sender Receiver
11

54. One message with parts that
can be handled individually
12

55. 12

56. Sender Receiver
12

57. Sender Receiver
12

58. Message
Sender Part 1 Receiver
Part 2
12

59. Message
Sender Part 1 Receiver
Part 2
12

60. Part 1
Sender Receiver
Part 2
12

61. Part 1
Sender Receiver
Part 2
12

62. Part 1
Sender Receiver
Part 2
12

63. Splitter
Part 1
Sender Receiver
Part 2
12

64. Many Messages that needs to
be handled together
13

65. 13

66. Sender
13

67. Sender Receiver
13

68. Sender Receiver
13

69. Part 1
Sender Receiver
13

70. Part 1
Sender Receiver
Part 2
13

71. Part 1
Sender Receiver
Part 2
13

72. Part 1
Sender Receiver
Part 2
13

73. Part 1
Sender Receiver
Part 2
13

74. Message
Part 1
Sender Receiver
Part 2
13

75. Message
Part 1
Sender Receiver
Part 2
13

76. Aggregator
Message
Part 1
Sender Receiver
Part 2
13

77. You have one entry point for
messages but they need to be
handled by different
processes
14

78. 14

79. Receiver 1
Sender
Receiver 2
14

80. Receiver 1
Sender
Receiver 2
14

81. Router
Receiver 1
Sender
Receiver 2
14

82. The sender and the receiver
does not speak the same
language
15

83. 15

84. Sender
15

85. Sender Receiver
15

86. Sender Receiver
15

87. Translator
Sender Receiver
15

88. You have messages that have
the same semantic but
different formats
16

89. 16

90. Sender 1
Receiver
Sender 2
16

91. Sender 1 Translator
Router Receiver
Sender 2 Translator
16

92. Normalizer
Sender 1 Translator
Router Receiver
Sender 2 Translator
16

93. You want to send the same
message to many but to
handle the responses
together
17

94. 17

95. Service 1
Sender 1 Aggregator Receiver
Service 2
17

96. Scatter Gather
Service 1
Sender 1 Aggregator Receiver
Service 2
17

97. Pipes & Filter
• Like Lego
• Combine different patterns
18

98. Other Patterns
• Resequencer
• Routing slip
19

99. Links
• Enterprise Integration Patterns site,
http://www.eaipatterns.com/
• Book, http://www.amazon.com/
Enterprise-Integration-Patterns-
Designing-Deploying/dp/0321200683
20

100. Questions?
21