在軟體開發過程中，時常會面臨許多複雜的需求場景，而這特別容易發生在企業的應用下。然而過往數據導向的直線式設計開發，卻容易使我們未發現、忽略建模時中所淺藏的需求複雜性，進而使得後期開發與重構難度提高。 為了解決這個現象，領域驅動設計 (DDD) 誕生了，藉由分析需求並建立領域的知識，以領域思維設計模型，使模型本身可以對焦業務並加以控制。因此 DDD 透過名為戰略建模的模式、事件風暴 (Event Storming)  來方法來實施。不過身為工程師的朋友肯定會有另一個疑問，那要實踐到開發中呢？ 為解決這個議題 DDD 透過另一半的拼圖 - 戰術建模來達成。而在這次的分享將會簡介一下 DDD 戰術建模的 10 個實踐模式，讓各位有的初步的認識。

1. DDD
DDD
2020/10 DDDTW Meetup
Eason Kuo

2. DDD

3. DDD

4. •
•
•
DDD

5. DDD

6. DDD
DDD
DDD
2003 Eric Evans Domain-Driven Design

7. DDD ?
- -
DDD

8. DDD ?
?
DDD -

9. Strategic Modeling

10. DDD
•
•
•
•
•
Strategic Modeling
•

11. DDD

12. (1) ( Domain Storytelling
- (
)
Strategic Modeling

13. (2) Event Storming
()
Strategic Modeling

14. Tactical Modeling

15. Tactical Modeling
1 0 69
ORM

16. Tactical Modeling

17. Tactical Modeling

18. A. (
C.
B. )
Reason
Tactical Modeling

19. A.
C.
B. ( )
1.
2. (Service)
Problem
Reason
3.
Tactical Modeling

20. A.
C.
B. ( )
1.
2. (Service)
Problem
Reason
3.
Tactical Modeling

21. Tactical Modeling
•
( )
• ( )

22. DDD
Tactical Modeling
•
•
•
•
•
•
•
•
•
•
•

23. Architecture

24. DDD
Tactical Modeling > (Architecture)
•
•
•
•
•

25. Tactical Modeling > (Architecture)
•

26. Tactical Modeling > (Architecture)
•
•

27. Tactical Modeling > (Architecture)
(Onion Architecture),
From 2008
• (
(Hexagonal Architecture),
From 2005
Clean Architecture),
From 2012
• (

28. Value Object

29. (Value Object)
Tactical Modeling > (Value Object)
?
Domain Driven Design - Tackling Complexity in the Heart of Software,
Eric Evans

30. (Value Object)
Tactical Modeling > (Value Object)

31. (Describe) (Measure)
Tactical Modeling > (Value Object)

32. (Describe) (Measure)
Tactical Modeling > (Value Object)

33. (Conceptual Whole)
•
•
•
•
•
Tactical Modeling > (Value Object)

34. (Conceptual Whole)
) (
Tactical Modeling > (Value Object)

35. ) (
Tactical Modeling > (Value Object)

36. -
QA 100
-
Tactical Modeling > (Value Object)

37. -
-
-
Tactical Modeling > (Value Object)

38. = -
Tactical Modeling > (Value Object)

39. - =
Tactical Modeling > (Value Object)

40. •
•
-
Tactical Modeling > (Value Object)

41. -
-
Tactical Modeling > (Value Object)

42. -
Tactical Modeling > (Value Object)
Setter Method (immutable)
only getter

43. Tactical Modeling > (Value Object)

44. Tactical Modeling > (Value Object)

45. ) Side-Effect Free
Tactical Modeling > (Value Object)
(
)
(

46. Side-Effect Free
Tactical Modeling > (Value Object)
(
) Method

47. Tactical Modeling > (Value Object)
•
•
•
•

48. (Entity)
Entity

49. (Entity) ?
Tactical Modeling > (Entity)
Domain Driven Design - Tackling Complexity in the Heart of Software,
Eric Evans

50. ID
Ticket number
Tactical Modeling > (Entity)

51. 1 30
Tactical Modeling > (Entity)

52. (Entity)
1. ) (
3. ( (
Identity
2.
e.g.
Tactical Modeling > (Entity)

56. 0 vs
1
Tactical Modeling > (Entity)

57. 0 vs
1
Tactical Modeling > (Entity)

58. ID
Tactical Modeling > (Entity)

59. ID
•
Tactical Modeling > (Entity)
ID(int, string …)
•
•
•
•

60. • getter / setter
•
Tactical Modeling > (Entity)
•

61. Tactical Modeling > (Entity)
Table SchemaDomain Model

62. (Aggregate)

63. (Aggregate) ?
Tactical Modeling > (Aggregate)
Domain Driven Design - Tackling Complexity in the Heart of Software,
Eric Evans

64. (Aggregate) ?
Tactical Modeling > (Aggregate)

65. Tactical Modeling > (Aggregate)

66. Tactical Modeling > (Aggregate)

67. Tactical Modeling > (Aggregate)
PS:

68. Tactical Modeling > (Aggregate)
3
( ) 3 .
12 Bug .

69. 1
Tactical Modeling > (Aggregate)
4 3
2 Bug 3
3 ) . (

70. Tactical Modeling > (Aggregate)
OrderItem
Update
Update Update

71. Tactical Modeling > (Aggregate)
Order 250
Tracy
Mary

72. Tactical Modeling > (Aggregate)

73. Tactical Modeling > (Aggregate)
Order 250

74. Tactical Modeling > (Aggregate)
Order ) 250 (

75. (Aggregate)
Tactical Modeling > (Aggregate)
•

76. (Aggregate)
Tactical Modeling > (Aggregate)
•
(Entity) (Value Object)

77. (Aggregate)
Tactical Modeling > (Aggregate)
•

78. (Aggregate) (
Tactical Modeling > (Aggregate)
• Business rule
) (
•
•
• 0
•
•
• x

79. (Aggregate)
Tactical Modeling > (Aggregate)
•
• (Transaction)

80. (Aggregate)
Tactical Modeling > (Aggregate)
• (Aggregate Root)
•

81. (Aggregate)
Tactical Modeling > (Aggregate)
• (Entity)
•
•
•
•
•

82. (Aggregate)
Tactical Modeling > (Aggregate)
• (Entity)
•
•
•
•
•

83. (Aggregate)
Tactical Modeling > (Aggregate)
•
•

84. (Aggregate)
Tactical Modeling > (Aggregate)
•
•

85. (Aggregate) ) (
Tactical Modeling > (Aggregate)
•

86. (Aggregate)
Tactical Modeling > (Aggregate)

87. (Aggregate)
Tactical Modeling > (Aggregate)
ID

88. (Factory)

89. (Factory) DDD
Tactical Modeling > (Factory)
•

90. Tactical Modeling > (Factory)
• Factory Method Abstract Factory Builder
•
•
Car altis = Car.StartToManufacture() v.s Car altis = Car.Create()
Client Factory Car
Aggregate Root
Create
manufacture
car

91. Tactical Modeling > (Factory)
•
•
•
•

92. Tactical Modeling > (Factory)
•
•
•
•
•

93. (Repository)

94. (Repository)
Tactical Modeling > (Repository)
• CRUD
•
•
• (1:1 1: N)

95. (Repository)
Tactical Modeling > (Repository)
DDD

96. (Repository) ?
Tactical Modeling > (Repository)
Domain Driven Design - Tackling Complexity in the Heart of Software,
Eric Evans

97. DDD (Repository)
Tactical Modeling > (Repository)
•
•
•
• CRUD

98. Tactical Modeling > (Repository)
• (1:1 1: N) ?
• E.g : Order, OrderItem OrderRepository OrderItemRepository
• Order OrderItem
• OrderItem Order
• OrderItem Order

99. Tactical Modeling > (Repository)
•
•
• (1:1 1: N) ?
• E.g : Order, OrderItem OrderRepository OrderItemRepository
• Order OrderItem
• OrderItem Order
• OrderItem Order

100. Tactical Modeling > (Repository)
• client
Insert Update Delete Query
Client

101. Tactical Modeling > (Repository)
•
• txt
•

102. Tactical Modeling > (Repository)
•
• Application Service
• Session Unit Of Work Commit

103. (Domain Service)

104. Tactical Modeling > (Domain Service)
•
A B
A Account B Account
•

105. Tactical Modeling > (Domain Service)
•
A B
A Account B Account N’s Order Record
• .

106. (Domain Service)
Tactical Modeling > (Domain Service)
•
•
•
•
•
•
•

107. (Domain Service)
Tactical Modeling > (Domain Service)
•
•
•
•
•
•

108. (Domain Service)
Tactical Modeling > (Domain Service)
• ( Bounded Context
• )

109. (Application Service)

110. (Application Service)
Tactical Modeling > (Application Service)
• Client Use Case)
•
• Client Input Output
•
•
•
• (

111. (Application Service)
Tactical Modeling > (Application Service)
•
•

112. Tactical Modeling > (Application Service)

113. (Domain Event)

114. (Domain Event)
Tactical Modeling > (Domain Event)
Domain-Driven Design Reference - Definitions and Pattern Summaries,
Eric Evans

115. (Domain Event)
Tactical Modeling > (Domain Event)
•
•
• Order Created
•
(Create Order) (Order Created)

116. (Domain Event) ?
Tactical Modeling > (Domain Event)
•
•
•
•
•
•

117. (Domain Event) ?
Tactical Modeling > (Domain Event)
•
•
•
•
•
•
•

118. (Domain Event)
Tactical Modeling > (Domain Event)
•
•
•

119. (Domain Event)
Tactical Modeling > (Domain Event)
• (immutable)
.
•
(primitive value)
• metadata
•
ID

120. (Domain Event)
- Tactical Modeling > (Domain Event)
•
•

121. (Module)

122. (Module)
Tactical Modeling > (Module)
•

123. . (Module)
Tactical Modeling > (Module)
• ) . .
•
• ) (
• .
•
app, controller, model, db, service

124. DDD (Module)
Tactical Modeling > (Module)
•
•
• (CCP)
•
•

125. DDD (Module) (1)
Tactical Modeling > (Module)
1.
2.
•
• Bounded Context
•

126. DDD (Module) (2)
Tactical Modeling > (Module)
3. domain
• models
• services
• repositories
• factories
4. models
• events
• exceptions

127. Take Away
Tactical Modeling > Take Away
• DDD
• DDD pattern language
•
• DDD
•