Hexagonal Architecture using Grails

•

1 like•3,006 views

Instead of following the normal data centric structure in Grails, this presentation describes implementing a highly decoupled, communication centric architecture in Grails.

Software Technology Business

David Dawson
CEO, Principal Consultant
david.dawson@simplicityitself.com
@davidthecoder

Grails' 'default'
Architecture
N-Tier
Data Centric

My Green Field Project
Web/ MVC Layer
Service Layer

My Green Field Project
Web/ MVC Layer
Service Layer
Data Layer

My Green Field Project
Web/ MVC Layer
Service Layer
Data Layer
DataController UserController AuthController
DataService UserService
User

My Green Field Project
Web/ MVC Layer
Service Layer
Data Layer
DataController UserController AuthController
DataService UserService
User
OAuthController
RandomService
UserSupportPoint

My Green Field Project
Web/ MVC Layer
Service Layer
Data Layer
DataController UserController AuthController
DataService UserService
User
1.2
OAuthController
RandomService
UserSupportPoint
DataController UserController AuthController
DataService UserService
User
OAuthController
RandomService
UserSupportPoint

Issues ..
Coupling between tiers
Service Spaghetti

Issues ..
Coupling between tiers
Service Spaghetti
User exposed to data model

I will show you:
Communication Centric
Domain Based

I will show you:
Communication Centric
Domain Based
Architecture

Hexagonal
●Coined by Alistair Cockburn,
2005ish
●Seperates Core application from
Integration with the world
http://alistair.cockburn.us/Hexagonal+architecture

Core Domain
Application Policies
Business Rules

Core Domain
Application Policies
Business Rules
REST

Core Domain
Application Policies
Business Rules
REST
Events

Core Domain
Application Policies
Business Rules
REST
Customer
UI
Events

Core Domain
Application Policies
Business Rules
REST
Customer
UI
Database
Events

A Business Process
(Workflow)
Create Document

A Business Process
(Workflow)
Create DocumentCreate Document Review Document

A Business Process
(Workflow)
Create DocumentCreate Document Review Document Approve Document

A Business Process
(Workflow)
Create DocumentCreate Document Review Document Approve Document
Reject

A Business Process
(Workflow)
Create DocumentCreate Document Review Document Approve Document
Reject Insert into System

Blatant Promo
https://skillsmatter.com/conferences/6312-mucon
Training ...
µCon: The Microservices Conference
27th
, 28th
November, London

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Mobile App Development Company In Noida | Drona Infotech

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React.js, a JavaScript library developed by Facebook, has gained immense popularity for building user interfaces, especially for single-page applications. Over the years, React has evolved and expanded its capabilities, becoming a preferred choice for mobile app development. This article will explore why React.js is an excellent choice for the Best Mobile App development company in Noida. Visit Us For Information: https://www.linkedin.com/pulse/what-makes-reactjs-stand-out-mobile-app-development-rajesh-rai-pihvf/

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Hexagonal Architecture using Grails

1. Grails Hexagonal Architecture

2. David Dawson CEO, Principal Consultant david.dawson@simplicityitself.com @davidthecoder

3. Architecture vs Design

4. Limitless Options For Design

5. Only a few Architectures

6. Architecture Is Philosophy

8. Grails' 'default' Architecture

9. Grails' 'default' Architecture N-Tier

10. Grails' 'default' Architecture N-Tier Data Centric

11.

12. My Green Field Project

13. My Green Field Project Web/ MVC Layer

14. My Green Field Project Web/ MVC Layer Service Layer

15. My Green Field Project Web/ MVC Layer Service Layer Data Layer

16. My Green Field Project Web/ MVC Layer Service Layer Data Layer DataController UserController AuthController DataService UserService User

17. My Green Field Project Web/ MVC Layer Service Layer Data Layer DataController UserController AuthController DataService UserService User OAuthController RandomService UserSupportPoint

18. My Green Field Project Web/ MVC Layer Service Layer Data Layer DataController UserController AuthController DataService UserService User 1.2 OAuthController RandomService UserSupportPoint DataController UserController AuthController DataService UserService User OAuthController RandomService UserSupportPoint

19. My Green Field Project Web/ MVC Layer Service Layer Data Layer DataController UserController AuthController DataService UserService User 1.3 OAuthController RandomService UserSupportPoint DataController UserController AuthController DataService UserService User OAuthController RandomService UserSupportPoint DataService DataService DataService MehServ iceBlahServiceDataService GahService DoWorkService

20. My Green Field Project Web/ MVC Layer Service Layer Data Layer DataController UserController AuthController DataService UserService User 1.3 OAuthController RandomService UserSupportPoint DataController UserController AuthController DataService UserService User OAuthController RandomService UserSupportPoint DataService DataService DataService MehServ iceBlahServiceDataService GahService DoWorkService VIEWS

21. My Green Field Project Web/ MVC Layer Service Layer Data Layer DataController UserController AuthController DataService UserService User 1.3 OAuthController RandomService UserSupportPoint DataController UserController AuthController DataService UserService User OAuthController RandomService UserSupportPoint DataService DataService DataService MehServ iceBlahServiceDataService GahService DoWorkService VIEWS

22. My Green Field Project Web/ MVC Layer Service Layer Data Layer DataController UserController AuthController DataService UserService User 1.3 OAuthController RandomService UserSupportPoint DataController UserController AuthController DataService UserService User OAuthController RandomService UserSupportPoint DataService DataService DataService MehServ iceBlahServiceDataService GahService DoWorkService VIEWS

23. Issues ..

24. Issues .. Coupling between tiers

25. Issues .. Coupling between tiers Service Spaghetti

26. Issues .. Coupling between tiers Service Spaghetti User exposed to data model

27.

28. Architecture

29. Architecture Data Centric

30. Architecture Data Centric N-Tier

31. I will show you:

32. I will show you: Communication Centric

33. I will show you: Communication Centric Domain Based

34. I will show you: Communication Centric Domain Based Architecture

35. I will show you: Hexagonal Architecture

36. I will show you: Event Architecture

37. I will show you: No New Frameworks

38. What are Events?

39. Asynchronous?

40. Communication

41. Imperative to Declarative

42. What is Hexagonal?

43. Hexagonal ●Coined by Alistair Cockburn, 2005ish ●Seperates Core application from Integration with the world http://alistair.cockburn.us/Hexagonal+architecture

44. The 'Life Preserver' Approach

45.

46. Core Domain Application Policies Business Rules

47. Core Domain Application Policies Business Rules REST

48. Core Domain Application Policies Business Rules REST Events

49. Core Domain Application Policies Business Rules REST Customer UI Events

50. Core Domain Application Policies Business Rules REST Customer UI Database Events

51. 'Example' Application

52.

53.

54.

55. A Core/ Logic Domain