[WDS Community Bootcamp] Hexagonal Architecture

@camposmilaa hexagonal architecture

@camposmilaa

@camposmilaa Why?

@camposmilaa “we need to release this soon, let’s do it
anyhow! we can clean it up later...” - every dev I know

@camposmilaa “the fact is that making messes is always slower
than staying clean.” - Uncle Bob

@camposmilaa architecture

@camposmilaa a good architecture screams software intention

@camposmilaa

@camposmilaa hexagonal architecture

@camposmilaa

@camposmilaa clean architecture

@camposmilaa

@camposmilaa core application

@camposmilaa core application adapters

@camposmilaa core application adapters external world

@camposmilaa ports and adapters

@camposmilaa

@camposmilaa what’s the idea?

@camposmilaa framework independent

@camposmilaa framework independent ui independent

@camposmilaa framework independent ui independent database independent

@camposmilaa framework independent ui independent database independent independent of any
external agents

@camposmilaa framework independent ui independent database independent independent of any
external agents easily testable

@camposmilaa

@camposmilaa the rules

@camposmilaa 1. the layers are everything

@camposmilaa core application adapters external world domain rules (entities) application
rules (use cases)

@camposmilaa core application adapters external world database web mailers async
jobs integrations

@camposmilaa core application adapters external world controller presenters gateways

@camposmilaa 2. dependencies should only go inwards

@camposmilaa external world

@camposmilaa external world database

@camposmilaa external world web

@camposmilaa external world framework

@camposmilaa external world scheduled job

@camposmilaa external world terminal

@camposmilaa

@camposmilaa ubiquitous language

@camposmilaa ubiquitous language customer

@camposmilaa ubiquitous language user customer

@camposmilaa ubiquitous language customer customer

@camposmilaa use cases entities

@camposmilaa entities - what the system is customer - document
number - name - birth date

@camposmilaa entities - what the system is address - street
- number - city

@camposmilaa entities - what the system is product - name
- price

@camposmilaa entities - what the system is order - ordered
at

@camposmilaa entities - what the system is buyer

@camposmilaa entities - what the system is item - quantity
- price

@camposmilaa entities - what the system is are

@camposmilaa entities - what the system is ADD ITEM +
product + quantity + buyer

@camposmilaa entities - what the system is

@camposmilaa use cases or interactors - what the system does
create ask for refund ship check fraud risk

@camposmilaa create order input - customer data - shipping address
- payment data flow 1. customer requests order creation 2. system validates given data 3. system creates order and define order id 4. system given order id back to the customer

@camposmilaa adapters

@camposmilaa adapters presenter controller use case interactor control flow external
world

@camposmilaa

@camposmilaa what about the dependency rule?

@camposmilaa adapters - dependency inversion principle (DIP) presenter controler use
case input port use case output port use case interactor control flow I I

@camposmilaa adapters - dependency inversion principle (DIP)

@camposmilaa just a thought...

@camposmilaa “the only way to go fast, is to go
well.” - Uncle Bob

@camposmilaa Desenvolvedora na Creditas Organizadora do Rails Girls Organizadora do
Women Dev Summit Camila Campos

@camposmilaa thanks! [email protected] @camposmilaa bit.ly/wds-hexagonal-arch

@camposmilaa Interesting Links https://8thlight.com/blog/uncle-bob/2012/08/13/the-clean-architecture.html https://8thlight.com/blog/uncle-bob/2011/09/30/Screaming-Architecture.html http://alistair.cockburn.us/Hexagonal+architecture http://blog.mattwynne.net/2012/05/31/hexagonal-rails-objects-values-and-hexagons/ https://spin.atomicobject.com/2013/02/23/ports-adapters-software-architecture/ http://five.agency/android-architecture-part-3-applying-clean-architecture-android/ http://tidyjava.com/clean-architecture-screaming/
Domain Driven Rails by Yan Pritzker https://vimeo.com/106759024 Clean Architecture by Uncle Bob https://www.youtube.com/watch?v=Nltqi7ODZTM Clean Architecture and Desing by Uncle Bob https://www.youtube.com/watch?v=Nsjsiz2A9mg Hexagonal Rails by Matt Wynne https://www.youtube.com/watch?v=CGN4RFkhH2M Clean Architecture: A Craftsman's Guide to Software Structure and Design by Uncle Bob (Livro)

[WDS Community Bootcamp] Hexagonal Architecture

[WDS Community Bootcamp] Hexagonal Architecture

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