A craftsman’s guide to designing clean architecture

In this talk, Software Craftsman Marcus Biel describes how to design a Clean Architecture.

Transcript

1. Marcus Biel, Software Craftsman Krakow | 20. October 2018
 A craftsman’s guide to designing clean architecture
2. Copyright 2018 Marcus Biel https://cleancodeacademy.com Defining a Clean Architecture
3. Copyright 2018 Marcus Biel https://cleancodeacademy.com Defining a Clean Architecture
4. Copyright 2018 Marcus Biel https://cleancodeacademy.com Defining a Clean Architecture
5. Copyright 2018 Marcus Biel https://cleancodeacademy.com Defining a Clean Architecture METHODS CLASSES PACKAGES MODULES
6. Copyright 2018 Marcus Biel https://cleancodeacademy.com Defining a Clean Architecture Domain Infrastructure HTTPS REST SOAP http://bit.ly/HexagonalArchitecture
7. Copyright 2018 Marcus Biel https://cleancodeacademy.com Defining a Clean Architecture
8. Copyright 2018 Marcus Biel https://cleancodeacademy.com Defining a Clean Architecture Domain Infrastructure HTTPS REST SOAP http://bit.ly/HexagonalArchitecture
9. Copyright 2018 Marcus Biel https://cleancodeacademy.com Defining a Clean Architecture
10. Copyright 2018 Marcus Biel https://cleancodeacademy.com About Me Clean Code Evangelist • Public Speaker Author • Java Influencer • JCP Member Clean Code Coach • Java Consultant @MarcusBiel https://cleancodeacademy.com
11. Copyright 2018 Marcus Biel https://cleancodeacademy.com Preconditions Mutual Trust and Respect No Fear Product before Process Technical Debt vs. Organisational Debt Developers are Stakeholders
12. Copyright 2018 Marcus Biel https://cleancodeacademy.com Building Blocks of a Clean Architecture ‣ Testing ‣ Size ‣ Naming ‣ Encapsulation ‣ Coupling and Cohesion
13. Copyright 2018 Marcus Biel https://cleancodeacademy.com Testing Test first (TDD) or Test Last Let's you eat your own dog food Aim for High Branch Coverage
14. Copyright 2018 Marcus Biel https://cleancodeacademy.com Size METHODS CLASSES PACKAGES MODULES
15. Copyright 2018 Marcus Biel https://cleancodeacademy.com Naming Clean names drive high cohesion 
 (Customer, AccountNumber) Use service pattern judiciously Clean names are team work Rename on new insights
16. Copyright 2018 Marcus Biel https://cleancodeacademy.com Encapsulation technically enforces of how the system should be used. Getters and Setters violate encapsulation. Use package private more often! http://bit.ly/EvilGettersAndSetters
17. Copyright 2018 Marcus Biel https://cleancodeacademy.com Coupling Tight Coupling Loose Coupling
18. Copyright 2018 Marcus Biel https://cleancodeacademy.com Coupling Strength ‣ Type of Coupling ‣ Distance of the Components ‣ Time of Coupling
19. Copyright 2018 Marcus Biel https://cleancodeacademy.com Type of Coupling
20. Copyright 2018 Marcus Biel https://cleancodeacademy.com Distance of the Components METHODS CLASSES PACKAGES MODULES
21. Copyright 2018 Marcus Biel https://cleancodeacademy.com Distance of the Components
22. Copyright 2018 Marcus Biel https://cleancodeacademy.com Distance of the Components
23. Copyright 2018 Marcus Biel https://cleancodeacademy.com Distance of the Components
24. Copyright 2018 Marcus Biel https://cleancodeacademy.com Time of Coupling
25. Copyright 2018 Marcus Biel https://cleancodeacademy.com Cohesion Low Cohesion High Cohesion
26. Copyright 2018 Marcus Biel https://cleancodeacademy.com Cohesion Low Cohesion High Cohesion
27. Copyright 2018 Marcus Biel https://cleancodeacademy.com Cohesion High Cohesion requires in-depth knowledge of the domain.
28. Copyright 2018 Marcus Biel https://cleancodeacademy.com What is Clean Architecture? I would advise students to pay more attention to the fundamental ideas rather than the latest technology. The technology will be out-of-date before they graduate. Fundamental ideas never get out of date. — David L. Parnas “ ”
29. Copyright 2018 Marcus Biel https://cleancodeacademy.com Slides: http://bit.ly/ByteMyCode Questions? marcus@cleancodeacademy.com Thanks!