Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Hexagonal Architecture
Search
Chris Fidao
May 16, 2014
Technology
49
200k
Hexagonal Architecture
An explanation on what Hexagonal Architecture is - the decoupling of layers in your code.
Chris Fidao
May 16, 2014
Tweet
Share
More Decks by Chris Fidao
See All by Chris Fidao
Development Environments that Feel Local
fideloper
0
34
Refactoring Terraform - CloudCasts - Scaling EC2
fideloper
0
59
Scaling Laravel - Laracon.net 2018
fideloper
15
1.8k
Linux Environment
fideloper
1
10k
Server Survival
fideloper
29
23k
FileBeat (Won't save you from the JVM)
fideloper
1
310
Powering Your Applications With Nginx
fideloper
9
7.7k
Intro to etcd
fideloper
3
550
Service Oriented Architecture with a little help from NodeJS
fideloper
4
2.3k
Other Decks in Technology
See All in Technology
PHPで印刷所に入稿できる名札データを作る / Generating Print-Ready Name Tag Data with PHP
tomzoh
0
180
スキルだけでは満たせない、 “組織全体に”なじむオンボーディング/Onboarding that fits “throughout the organization” and cannot be satisfied by skills alone
bitkey
0
150
AWSではじめる Web APIテスト実践ガイド / A practical guide to testing Web APIs on AWS
yokawasa
6
370
AWSアカウントのセキュリティ自動化、どこまで進める? 最適な設計と実践ポイント
yuobayashi
5
180
役員・マネージャー・著者・エンジニアそれぞれの立場から見たAWS認定資格
nrinetcom
PRO
1
3.9k
PHPカンファレンス名古屋-テックリードの経験から学んだ設計の教訓
hayatokudou
2
530
1行のコードから社会課題の解決へ: EMの探究、事業・技術・組織を紡ぐ実践知 / EM Conf 2025
9ma3r
8
2.8k
プロダクトエンジニア構想を立ち上げ、プロダクト志向な組織への成長を続けている話 / grow into a product-oriented organization
hiro_torii
1
340
JavaにおけるNull非許容性
skrb
2
2.4k
コンピュータビジョンの社会実装について考えていたらゲームを作っていた話
takmin
1
580
偏光画像処理ライブラリを作った話
elerac
1
160
日経のデータベース事業とElasticsearch
hinatades
PRO
0
200
Featured
See All Featured
Rails Girls Zürich Keynote
gr2m
94
13k
The Power of CSS Pseudo Elements
geoffreycrofte
75
5.5k
Sharpening the Axe: The Primacy of Toolmaking
bcantrill
40
2k
Practical Orchestrator
shlominoach
186
10k
Reflections from 52 weeks, 52 projects
jeffersonlam
348
20k
Done Done
chrislema
182
16k
XXLCSS - How to scale CSS and keep your sanity
sugarenia
248
1.3M
Designing on Purpose - Digital PM Summit 2013
jponch
117
7.1k
Code Review Best Practice
trishagee
67
18k
GraphQLとの向き合い方2022年版
quramy
44
13k
What's in a price? How to price your products and services
michaelherold
244
12k
Understanding Cognitive Biases in Performance Measurement
bluesmoon
27
1.6k
Transcript
Hexagonal Architecture Chris Fidao (hek-sag-uh-nl)
@fideloper
None
Implementing Laravel Real-world implementation of testable and maintainable code. (hopefully)
Vaprobash Vagrant Provisioning Bash Scripts
Servers for Hackers.com
Why / What Ports / Adapters Boundary Layers /
WHY Architecture
Maintainability Technical Debt Time
What is it?
So…What is it?
The Hexagon Core Domain Application Domain Framework
(Core) Domain Core Domain Application Domain Framework
Behavior
Constraints
Application Core Domain Application Domain Framework
Framework Core Domain Application Domain Framework
Outside Core Domain Application Domain Framework
Ports Adapters /
Ports & Adapters Core Domain Application Domain Framework
Inside/Outside Core Domain Application Domain CommandBus Framework HTTP Use Case
Repo DBAL Database Events Dispatcher Service Impl
Core Domain Application Domain Framework Dependencies
interface Notifier { ! public function send(Message $message); } class
SesNotifier implements Notifier { ! public function send(Message $message) { // Details } }
Use-Case Driven Development
All the Contexts •Web •API •CLI •Queue •Event Handler
Use Cases: CommandBus CommandBus executes( ) Command Handler handles( )
Command
// Class SimpleCommandBus ! public function execute( $command ) {
return $this->getHandler( $command ) ->handle( $command ); } Simple CommandBus
Core Domain Application Domain CommandBus Framework HTTP Use Case Repo
DBAL Database Events Dispatcher Service Impl
None
Boundaries
Domain/Application Boundary Core Domain Application Domain Framework Use Case Repo
Events
interface CommandBusInterface { ! public function execute( $command ); }
interface HandlerInterface { ! public function handle( $command ); }
Core Domain Application Domain Framework Use Case Repo Events
interface TicketRepositoryInterface { ! public function getStaffOpenTickets( Staffer $staffer, $limit=10);
! ! public function save(Ticket $model); }
Application Domain CommandBus Framework DBAL Dispatcher The Application/External Boundary
interface Notifier { ! public function send(Message $message); } interface
Validator { ! public function passes(Array $data); ! public function getErrors(); } interface Dispatcher { ! public function dispatch(Array $events); }
Framework Core Domain Application Domain Framework HTTP Database Service Impl
Identify the aspects that vary and separate them from what
stays the same
Layers
The Domain Core Domain Application Domain Framework Use Case Repo
Events
<?php namespace Hex\Tickets; ! class Ticket extends Model { !
public function assignStaffer(Staffer $staffer) { if( ! $staffer->categories->contains( $this->category ) ) { throw new DomainException("Staffer can't be assigned to ".$this->category); } ! $this->staffer()->associate($staffer); // Set Relationship ! return $this; } ! public function setCategory(Category $category) { if( $this->staffer instanceof Staffer && ! $this->staffer->categories->contains( $category ) ) { // Unset staffer if can't be assigned to set category $this->staffer = null; } ! $this->category()->associate($category); // Set Relationship ! return $this; } }
class Ticket extends Model { ! /* ... Other logic
... */ ! public function save(array $options = array()) { /* Integrity Checks, and then: */ ! if( ! $this->exists ) { $this->raise( new TicketCreatedEvent($this) ); } ! return parent::save($options); } }
class CreateTicketCommand { ! protected $data; ! public function __construct($data)
{ $this->data = $data; } ! public function __get($property) { // Simplified example return $this->data[$property]; } }
The Application Application Domain CommandBus Framework DBAL Dispatcher
// Class SimpleCommandBus ! public function execute( $command ) {
return $this->getHandler( $command ) ->handle( $command ); }
! class CreateTicketHandler implements HandlerInterface { ! ! public function
handle($command) { $this->validate($command); // Throw ValidationException $this->save($command); } ! protected function save($command) { $ticket = new Ticket; /* Some other setters... */ $ticket->setCategory( $this->catRepo->find($command->category_id) ); $ticket->setStaffer( $this->staffRepo->find($command->staffer_id) ); $ticket->addMessage( $ticket->addMessage($command->message); ); ! $this->ticketRepo->save($ticket); // Use Repositories ! $this->dispatcher->dispatch( $ticket->flushEvents() ); // Fire Events } }
class DbTicketRepository implements RepositoryInterface { ! public function getStaffOpenTickets(Staffer $staffer,
$limit=10) { return $this->ticket->where('staff_id', $staffer->id) ->take($limit)->get(); } ! public function save(Ticket $ticket) { $ticket->save(); } }
Framework Core Domain Application Domain Framework HTTP Database Service Impl
class TicketController extends BaseController { ! public function createTicket() {
$command = new CreateTicketCommand( Input::all() ); ! try { $this->bus->execute($command); } catch(ValidationException $e) { return Redirect::to('/tickets/new') ->withErrors( $e->getErrors() ); } catch(DomainException $e) { return Redirect::to('/tickets/new') ->withErrors( $e->getErrors() ); } return Redirect::to(‘/tickets'); } }
class SesEmailNotifier implements NotifierInterface { ! public function __construct(SesClient $client)
{ $this->client = $client; } ! public function send(Message $message) { $to = [$message->to()]; $message = ['Data' => $message->message()]; ! $this->client->sendEmail([ 'Destination' => ['ToAddresses' => $to], 'Message' => ['Body' => ['Html' => $message]] ]); } }
use Illuminate\Events\Dispatcher as EventDispatcher; ! class LaravelDispatcher implements Dispatcher {
! public function __construct(EventDispatcher $dispatcher) { $this->dispatcher = $dispatcher; } ! public function dispatch(Array $events) { foreach( $events as $event ) { $this->dispatcher->fire( $event->name(), $event ); } } ! }
TDD is DEAD (and other myths)
Identify the aspects that vary and separate them from what
stays the same
Thanks