MicroObjects Technical Practices 20180419

What practices are used to wire in the microObjects style? This presentation goes over the 12 primary practices that produce simple, understandable, testable code resulting in a highly maintainable product.

Transcript

1. @TheQuinnGil https://QuinnGil.com
   µObjects
   

   View Slide

2. @TheQuinnGil https://QuinnGil.com
   Who Am I?
   ● Quinn Gil
   ○ @TheQuinnGil
   ○ https://QuinnGil.com
   ● Professionally programming 20 years
   ● Passion for helping others write better
   ● Coding is my hobby
   µObjects
   

   View Slide

3. @TheQuinnGil https://QuinnGil.com
   Single Responsibility
   µObjects
   to the extreme
   µObjects
   

   View Slide

4. @TheQuinnGil https://QuinnGil.com
   Encapsulation
   µObjects
   ?
   

   View Slide

5. @TheQuinnGil https://QuinnGil.com
   Encapsulation
   µObjects
   Behavior
   

   View Slide

6. @TheQuinnGil https://QuinnGil.com
   µObjects
   Never Return Your Data
   

   View Slide

7. @TheQuinnGil https://QuinnGil.com
   µObjects
   Never Return Your Data
   

   View Slide

8. @TheQuinnGil https://QuinnGil.com
   Immutability - Externally Immutable
   µObjects
   

   View Slide

9. @TheQuinnGil https://QuinnGil.com
   Immutability - Externally Immutable
   µObjects
   

   View Slide

10. @TheQuinnGil https://QuinnGil.com
    Immutability - Externally Immutable
    µObjects
    

    View Slide

11. @TheQuinnGil https://QuinnGil.com
    Immutability - Internally Immutable
    µObjects
    

    View Slide

12. @TheQuinnGil https://QuinnGil.com
    Immutability
    µObjects
    

    View Slide

13. @TheQuinnGil https://QuinnGil.com
    No ‘new’ Inline - Inversion of Control
    µObjects
    

    View Slide

14. @TheQuinnGil https://QuinnGil.com
    No ‘new’ Inline - Inversion of Control
    µObjects
    

    View Slide

15. @TheQuinnGil https://QuinnGil.com
    No ‘new’ Inline - Injection
    µObjects
    

    View Slide

16. @TheQuinnGil https://QuinnGil.com
    No ‘new’ Inline - All Knowing
    µObjects
    

    View Slide

17. @TheQuinnGil https://QuinnGil.com
    No ‘new’ Inline - All Knowing
    µObjects
    

    View Slide

18. @TheQuinnGil https://QuinnGil.com
    No ‘new’ Inline - DIY
    µObjects
    

    View Slide

19. @TheQuinnGil https://QuinnGil.com
    Anti-Pattern: Primitive Obsession
    µObjects
    

    View Slide

20. @TheQuinnGil https://QuinnGil.com
    Anti-Pattern: Primitive Obsession
    µObjects
    

    View Slide

21. @TheQuinnGil https://QuinnGil.com
    Anti-Pattern: Primitive Obsession
    µObjects
    

    View Slide

22. @TheQuinnGil https://QuinnGil.com
    Anti-Pattern: Primitive Obsession
    µObjects
    

    View Slide

23. @TheQuinnGil https://QuinnGil.com
    Anti-Pattern: Primitive Obsession
    µObjects
    

    View Slide

24. @TheQuinnGil https://QuinnGil.com
    Anti-Pattern: Primitive Obsession
    µObjects
    

    View Slide

25. @TheQuinnGil https://QuinnGil.com
    Anti-Pattern: Primitive Obsession
    µObjects
    

    View Slide

26. @TheQuinnGil https://QuinnGil.com
    Encapsulate Relationships
    µObjects
    

    View Slide

27. @TheQuinnGil https://QuinnGil.com
    Encapsulate Relationships
    µObjects
    

    View Slide

28. @TheQuinnGil https://QuinnGil.com
    No Nulls
    µObjects
    

    View Slide

29. @TheQuinnGil https://QuinnGil.com
    No Nulls
    µObjects
    Null Object Pattern
    

    View Slide

30. @TheQuinnGil https://QuinnGil.com
    ‘if’ Only as Guard Clause
    µObjects
    

    View Slide

31. @TheQuinnGil https://QuinnGil.com
    ‘switch’ & ‘else’ Are Always Evil
    µObjects
    

    View Slide

32. @TheQuinnGil https://QuinnGil.com
    ‘switch’ & ‘else’ Are Always Evil
    µObjects
    

    View Slide

33. @TheQuinnGil https://QuinnGil.com
    ‘switch’ & ‘else’ Are Always Evil
    µObjects
    

    View Slide

34. @TheQuinnGil https://QuinnGil.com
    Composition Over Inheritance
    µObjects
    

    View Slide

35. @TheQuinnGil https://QuinnGil.com
    Composition Over Inheritance
    µObjects
    

    View Slide

36. @TheQuinnGil https://QuinnGil.com
    µObjects
    Interface Everything
    

    View Slide

37. @TheQuinnGil https://QuinnGil.com
    No Statics
    µObjects
    

    View Slide

38. @TheQuinnGil https://QuinnGil.com
    No Public Constants
    µObjects
    

    View Slide

39. @TheQuinnGil https://QuinnGil.com
    Never Type Inspection or Reflection
    µObjects
    

    View Slide

40. @TheQuinnGil https://QuinnGil.com
    No Asymmetric Marriage
    µObjects
    

    View Slide

41. @TheQuinnGil https://QuinnGil.com
    No Asymmetric Marriage
    µObjects
    

    View Slide

42. @TheQuinnGil https://QuinnGil.com
    No Asymmetric Marriage
    µObjects
    

    View Slide

43. @TheQuinnGil https://QuinnGil.com
    Operating System Abstraction Layer
    µObjects
    

    View Slide

44. @TheQuinnGil https://QuinnGil.com
    µObjects Practices
    µObjects
    ● Never Return Your Data
    ● Always Immutable
    ● No ‘new’ Inline
    ● No Primitive Obsession
    ● Encapsulate Relationships
    ● No nulls
    ● ‘if’ Only as Guard Clause
    ● ‘switch’ & ‘else’ Always Evil
    ● Composition Over Inheritance
    ● Interface Everything
    ● No Statics
    ● No Public Constants
    ● No Asymmetric Marriage
    ● OS Abstraction Layer
    An Object Does A Single Thing
    

    View Slide

45. @TheQuinnGil https://QuinnGil.com
    µObjects - What do we get?
    µObjects
    Maintainability
    

    View Slide

46. @TheQuinnGil https://QuinnGil.com
    µObjects
    

    View Slide

47. @TheQuinnGil https://QuinnGil.com
    µObjects
    µObjects
    Single Responsibility
    to the Extreme
    

    View Slide

48. @TheQuinnGil https://QuinnGil.com
    µObjects
    Resources
    https://QuinnGil.com
    

    View Slide