Clean Architecture

Building upon the success of best-sellers The Clean Coder and Clean Code , legendary software craftsman Robert C. "Uncle Bob" Martin shows how to bring greater professionalism and discipline to application architecture and design.

As with his other books, Martin's Clean Architecture doesn't merely present multiple choices and options, and say "use your best judgment": it tells you what choices to make, and why those choices are critical to your success. Martin offers direct, no-nonsense answers to key architecture and design questions like:

• What are the best high level structures for different kinds of applications, including web, database, thick-client, console, and embedded apps?
• What are the core principles of software architecture?
• What is the role of the architect, and what is he/she really trying to achieve?
• What are the core principles of software design?
• How do designs and architectures go wrong, and what can you do about it?
• What are the disciplines and practices of professional architects and designers?
  Clean Architecture is essential reading for every software architect, systems analyst, system designer, and software manager -- and for any programmer who aspires to these roles or is impacted by their work.

Autorentext
Robert C. Martin (“Uncle Bob”) has been a programmer since 1970. He is founder of Uncle Bob Consulting, LLC, and cofounder with his son Micah Martin of The Clean Coders LLC. Martin has published dozens of articles in various trade journals and is a regular speaker at international conferences and trade shows. He has authored and edited many books, including: Designing Object Oriented C++ Applications Using the Booch Method, Patterns Languages of Program Design 3, More C++ Gems, Extreme Programming in Practice, Agile Software Development: Principles, Patterns, and Practices, UML for Java Programmers, Clean Code, and The Clean Coder. A leader in the industry of software development, Martin served for three years as editor-in-chief of the C++ Report, and he served as the first chairman of the Agile Alliance.

Klappentext

Building upon the success of best-sellers The Clean Coder and Clean Code, legendary software craftsman Robert C. "Uncle Bob" Martin shows how to bring greater professionalism and discipline to application architecture and design.

As with his other books, Martin's Clean Architecture doesn't merely present multiple choices and options, and say "use your best judgment": it tells you what choices to make, and why those choices are critical to your success. Martin offers direct, no-nonsense answers to key architecture and design questions like:

• What are the best high level structures for different kinds of applications, including web, database, thick-client, console, and embedded apps?
• What are the core principles of software architecture?
• What is the role of the architect, and what is he/she really trying to achieve?
• What are the core principles of software design?
• How do designs and architectures go wrong, and what can you do about it?

• What are the disciplines and practices of professional architects and designers? Clean Architecture is essential reading for every software architect, systems analyst, system designer, and software manager -- and for any programmer who aspires to these roles or is impacted by their work.

Zusammenfassung

Building upon the success of best-sellers The Clean Coder and Clean Code, legendary software craftsman Robert C. "Uncle Bob" Martin shows how to bring greater professionalism and discipline to application architecture and design.

As with his other books, Martin's Clean Architecture doesn't merely present multiple choices and options, and say "use your best judgment": it tells you what choices to make, and why those choices are critical to your success. Martin offers direct, no-nonsense answers to key architecture and design questions like:

• What are the best high level structures for different kinds of applications, including web, database, thick-client, console, and embedded apps?
• What are the core principles of software architecture?
• What is the role of the architect, and what is he/she really trying to achieve?
• What are the core principles of software design?
• How do designs and architectures go wrong, and what can you do about it?
• What are the disciplines and practices of professional architects and designers? Clean Architecture is essential reading for every software architect, systems analyst, system designer, and software manager -- and for any programmer who aspires to these roles or is impacted by their work.

Inhalt

Foreword xv

Preface xix

Acknowledgments xxiii

About the Author xxv

Part I: Introduction 1

Chapter 1: What Is Design and Architecture? 3

The Goal? 4

Case Study 5

Conclusion 12

Chapter 2: A Tale of Two Values 13

Behavior 14

Architecture 14

The Greater Value 15

Eisenhower's Matrix 16

Fight for the Architecture 18

Part II: Starting with the Bricks: Programming Paradigms 19

Chapter 3: Paradigm Overview 21

Structured Programming 22

Object-Oriented Programming 22

Functional Programming 22

Food for Thought 23

Conclusion 24

Chapter 4: Structured Programming 25

Proof 27

A Harmful Proclamation 28

Functional Decomposition 29

No Formal Proofs 30

Science to the Rescue 30

Tests 31

Conclusion 31

Chapter 5: Object-Oriented Programming 33

Encapsulation? 34

Inheritance? 37

Polymorphism? 40

Conclusion 47

Chapter 6: Functional Programming 49

Squares of Integers 50

Immutability and Architecture 52

Segregation of Mutability 52

Event Sourcing 54

Conclusion 56

Part III: Design Principles 57

Chapter 7: SRP: The Single Responsibility Principle 61

Symptom 1: Accidental Duplication 63

Symptom 2: Merges 65

Solutions 66

Conclusion 67

Chapter 8: OCP: The Open-Closed Principle 69

A Thought Experiment 70

Directional Control 74

Information Hiding 74

Conclusion 75

Chapter 9: LSP: The Liskov Substitution Principle 77

Guiding the Use of Inheritance 78

The Square/Rectangle Problem 79

LSP and Architecture 80

Example LSP Violation 80

Conclusion 82

Chapter 10: ISP: The Interface Segregation Principle 83

ISP and Language 85

ISP and Architecture 86

Conclusion 86

Chapter 11: DIP: The Dependency Inversion Principle 87

Stable Abstractions 88

Factories 89

Concrete Components 91

Conclusion 91

Part IV: Component Principles 93

Chapter 12: Components 95

A Brief History of Components 96

Relocatability 99

Linkers 100

Conclusion 102

Chapter 13: Component Cohesion 103

The Reuse/Release Equivalence Principle 104

The Common Closure Principle 105

The Common Reuse Principle 107

The Tension Diagram for Component Cohesion 108

Conclusion 110

Chapter 14: Component Coupling 111

The Acyclic Dependencies Principle 112

Top-Down Design 118

The Stable Dependencies Principle 120

The Stable Abstractions Principle 126

Conclusion 132

Part V: Architecture 133

Chapter 15: What Is Architecture? 135

Development 137

Deployment 138

Operation 138

Maintenance 139

Keeping Options Open 140

Device Independence 142

Junk Mail 144

Physical Addressing 145

Conclusion 146

Chapter 16: Independence 147

Use Cases 148

Operation 149

Development 149

Deployment 150

Leaving Options Open 150

Decoupling Layers 151

Decoupling Use Cases 152

Decoupling Mode 153

Independent Develop-ability 153

Independent Deployability 154

Duplication 154

Decoupling Modes (Again) 155

Conclusion 158

**Chapter 17: Boundar…