Hexagonal Architecture Decouple your code
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Hexagonal ArchitectureDecouple your code
About me
MANEL SELLÉS
Software engineerat Ulabox
FIBer
@manelselles
Hexagonal architecture
ComplexSystems
Hexagonal architecture
http://www.slideshare.net/RubnSospedra/learning-from-the-ulabox-stack
Web & apps Integrations & Backoffice Warehouse Delivery
Servers
Hexagonal architecture
ComplexApplications
Hexagonal architecture
Hexagonal architecture
WTF??
Hexagonal architecture
Model-View-Controller(MVC)
Hexagonal architecture
Hexagonal architecture
class Controller{ public function index() {
$someStrangeValue = ...; /** Some operation with data from MySQL **/ render_html('index_view.php', $someStrangeValue); }}
Hexagonal architecture
What if I want to access from command line?
Hexagonal architecture
class Controller{ public function index() {
$someStrangeValue = ...; /** Some operation with data from MySQL **/ render_html('index_view.php', $someStrangeValue); }}
class CommandLine{ public function execute() {
$someStrangeValue = ...; /** Some operation with data from MySQL **/ print($someStrangeValue); }}
Hexagonal architecture
What if I want to publish it to a messaging queue?
Hexagonal architecture
class Controller{ public function index() {
$someStrangeValue = ...; /** Some operation with data from MySQL **/ render_html('index_view.php', $someStrangeValue); }}
class CommandLine{ public function execute() {
$someStrangeValue = ...; /** Some operation with data from MySQL **/ print($someStrangeValue); }}
class QueuePublisher{ public function publish() {
$someStrangeValue = ...; /** Some operation with data from MySQL **/ publish(new Message($someStrangeValue)); }}
Hexagonal architecture
My boss asks me to change the logic of
$someStrangeValue
Hexagonal architecture
class Controller{ public function index() {
$someStrangeValue = ...; /** Some operation with data from MySQL **/ render_html('index_view.php', $someStrangeValue); }}
class CommandLine{ public function execute() {
$someStrangeValue = ...; /** Some operation with data from MySQL **/ print($someStrangeValue); }}
class QueuePublisher{ public function publish() {
$someStrangeValue = ...; /** Some operation with data from MySQL **/ publish(new Message($someStrangeValue)); }}
Hexagonal architecture
What can we do?1. Live with duplication?2. Encapsulate in a service?
Hexagonal architecture
Dependency Injection to the rescue!
Hexagonal architecture
class StrangeCalculator{ public function calculate() {
$someStrangeValue = ...; /** Some operation with data from MySQL **/ return $someStrangeValue; }}
class Controller{
private $strangeCalculator;
public function __construct(StrangeCalculator $strangeCalculator) {
$this->strangeCalculator = $strangeCalculator; } public function index() { render_html('index_view.php', $this->strangeCalculator->calculate()); }}
Hexagonal architecture
class CommandLine{
private $strangeCalculator;
public function __construct(StrangeCalculator $strangeCalculator) {
$this->strangeCalculator = $strangeCalculator; } public function execute() { print($this->strangeCalculator->calculate()); }}
class QueuePublisher{
private $strangeCalculator;
public function __construct(StrangeCalculator $strangeCalculator) {
$this->strangeCalculator = $strangeCalculator; } public function publish() { publish(new Message($this->strangeCalculator->calculate())); }}
Hexagonal architecture
What if I decide to change my StrangeCalculator
database?
Hexagonal architecture
interface StrangeCalculator{ public function calculate();}
class StrangeCalculatorFromMySQL implements StrangeCalculator{ public function calculate() {
$someStrangeValue = ...; /** get value from google **/ return $someStrangeValue; }}
class StrangeCalculatorWithMongoDB implements StrangeCalculator{ public function calculate() {
$someStrangeValue = ...; /** get value from mongo DB **/ return $someStrangeValue; }}
Hexagonal architecture
class Controller{
private $strangeCalculator;
public function __construct(StrangeCalculator $strangeCalculator) {
$this->strangeCalculator = $strangeCalculator; } public function index() { render_html('index_view.php', $this->strangeCalculator->calculate()); }}
//Use controller with StrangeCalculatorFromMySQL
$strangeCalculatorFromMySQL = new StrangeCalculatorFromMySQL();new Controller($strangeCalculatorFromMySQL);
//Use controller with StrangeCalculatorWithMongoDB
$strangeCalculatorWithMongoDB = new StrangeCalculatorWithMongoDB();new Controller($strangeCalculatorWithMongoDB);
Hexagonal architecture
Welcome to Hexagonal Architecture!
akka ports & adapters
Hexagonal architecture
ThanksMake your code independent
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