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
49
Refactoring Terraform - CloudCasts - Scaling EC2
fideloper
0
76
Scaling Laravel - Laracon.net 2018
fideloper
15
1.9k
Linux Environment
fideloper
1
11k
Server Survival
fideloper
29
23k
FileBeat (Won't save you from the JVM)
fideloper
1
330
Powering Your Applications With Nginx
fideloper
9
7.7k
Intro to etcd
fideloper
3
580
Service Oriented Architecture with a little help from NodeJS
fideloper
4
2.3k
Other Decks in Technology
See All in Technology
GitHub Copilot の概要
tomokusaba
1
150
OPENLOGI Company Profile
hr01
0
67k
Witchcraft for Memory
pocke
1
680
Tokyo_reInforce_2025_recap_iam_access_analyzer
hiashisan
0
150
SpringBoot x TestContainerで実現するポータブル自動結合テスト
demaecan
0
130
5min GuardDuty Extended Threat Detection EKS
takakuni
0
180
強化されたAmazon Location Serviceによる新機能と開発者体験
dayjournal
4
280
KubeCon + CloudNativeCon Japan 2025 Recap Opening & Choose Your Own Adventureシリーズまとめ
mmmatsuda
0
240
How Community Opened Global Doors
hiroramos4
PRO
1
130
使いたいMCPサーバーはWeb APIをラップして自分で作る #QiitaBash
bengo4com
0
1.4k
AWS Summit Japan 2025 Community Stage - App workflow automation by AWS Step Functions
matsuihidetoshi
1
310
生成AI活用の組織格差を解消する 〜ビジネス職のCursor導入が開発効率に与えた好循環〜 / Closing the Organizational Gap in AI Adoption
upamune
6
4.7k
Featured
See All Featured
Designing Dashboards & Data Visualisations in Web Apps
destraynor
231
53k
Dealing with People You Can't Stand - Big Design 2015
cassininazir
367
26k
The Invisible Side of Design
smashingmag
300
51k
Music & Morning Musume
bryan
46
6.6k
Producing Creativity
orderedlist
PRO
346
40k
Raft: Consensus for Rubyists
vanstee
140
7k
Sharpening the Axe: The Primacy of Toolmaking
bcantrill
44
2.4k
Mobile First: as difficult as doing things right
swwweet
223
9.7k
Keith and Marios Guide to Fast Websites
keithpitt
411
22k
Art, The Web, and Tiny UX
lynnandtonic
299
21k
Imperfection Machines: The Place of Print at Facebook
scottboms
267
13k
Unsuck your backbone
ammeep
671
58k
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