「如果 SOLID 原則告訴我們的是如何將磚塊安排到牆壁和房間中，那麼元件原則就是告訴我們，如何將房間安排到建築物之中」

取自: Clean Architecture (p.79)

CH12: 元件 (Component)

發展 50 年的成果...

元件簡史

• Linker
• Loader
• Plugin

[補充]: 元件原則/打包原則 (Component Principles/Package Principles)

關於....

• 內聚性 (Cohesion)
  • The Reuse/Release Equivalence Principle (REP)

    ...

  • The Common Reuse Principle (CRP)

    ...

  • The Common Closure Principle (CCP)

    ...

• 耦合性 (Coupling)
  • The Acyclic Dependencies Principle (ADP)

    ...

  • The Stable-Dependency Principle (SDP)

    ...

  • The Stable-Abstractions Principle (SAP)

    ...

CH13: 元件內聚性 (Component Cohesion)

「我們曾經認為內聚性就是『一個模組只能執行一個功能』如此的屬性罷了。然而，在選擇類別(Class)組合成元件時，必須考慮到涉及可重用性和可發展性的相對力量」

取自: Clean Architecture (p.94)

元件內聚性的張力圖 (The Triad of Component Principles)

一般來說...
選擇 & 取捨...

Reuse / Release Equivalence Principle (REP)

「」

原文: "The granule of reuse is the granule of release"

取自:

...

Common Closure Principle (CCP)

「」

原文: "The classes in a package are reused together. If you reuse one of the classes in a package, you reuse them all"

取自:

...

Common Reuse Principle (CRP)

「」

原文: "The classes in a package should be closed together against the same kinds of changes. A change that affects a package affects all the classes in that package and no other packages"

取自:

...

Reference

元件內聚性 Component Cohesion
細談元件內聚性
Clean Architecture - Examples for "The Triad of Component Principles"
Clean Architecture -> PART IV: Component Principles
4.1. Principles of Package Design
Package principles