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Marek Matulka

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at @super_marek

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http://photobucket.com/user/marcrobinsone/media/Drupal%20Comics/marcrobinsonegmailcom__drupalNinja.png.html

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In order to create a good software, you have to know what the software is all about. – Eric Evans

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How do we learn?

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Stakeholders

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Ask for examples... ...write stories!

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Vocabulary

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Ubiquitous Language Ubiquitous Language

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Ubiquitous Language Ubiquitous Language Domain Expert Analyst Tester Developer Developer

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Ubiquitous Language Ubiquitous Language Domain Expert Analyst Tester Developer Developer Application Code Acceptance Criteria Specs and documentation

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Example?

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Example

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Example

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Domain

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Implementation

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why interface?

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Layered Architecture “High level modules should not depend on lower level implementation” – Robert C. Martin User Interface Application Domain Infrastructure

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Dependency Inversion Policy Layer Policy Service Mechanism Layer Mechanism Service Utility Layer

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Layered Architecture User Interface Application Domain Infrastructure

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Layered Architecture User Interface Application Domain Infrastructure

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Clean Architecture Entities Use Cases Controllers Web

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Clean Architecture Entities Use Cases Controllers Web Framework Drivers Interface Adapters Application Business Rules Enterprise Business Rules

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Hexagonal Architecture UI Adapter Log Adapter Data Storage Adapter External Data Adapter Application Domain

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Hexagonal Architecture Acme\Depot\DepotLocator Acme\MagentoAdapter\MagentoDepotLocator

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Hexagonal Architecture Acme\Depot\DepotLocator Acme\MagentoAdapter\MagentoDepotLocator port adapter

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Why clean architecture?

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Why clean architecture? - your code is clean(er)

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Why clean architecture? - your code is clean(er) - decoupled from framework

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Why clean architecture? - your code is clean(er) - decoupled from framework - reusable

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Why clean architecture? - your code is clean(er) - decoupled from framework - reusable - easy to test

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Why clean architecture? - your code is clean(er) - decoupled from framework - reusable - easy to test - easy to maintain

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Why clean architecture? - your code is clean(er) - decoupled from framework - reusable - easy to test - easy to maintain - easy to change

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dependency injection

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Dependency Injection - a standardised and centralised way of constructing objects in our application

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Kernel

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Kernel

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Kernel

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Kernel

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Kernel

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Kernel

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Kernel

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parameters.yml

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services.xml

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console commands

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Import Handler

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Console command

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app/console

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persisting products

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XML Writer

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Why write XML? - fetching data from Magento and dumping it into xml file is quick - xml can be imported by Drupal’s feed importer

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Why it didn’t work? - Feed importer was damn slow - 10k products imported in 4.5h - Scheduling import with Elysia Cron module was flaky - Scheduled feed importer would add products all over again - resources hungry!

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Direct save to the db

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Why direct save to the db? - Drupal promises data structure won’t ever change - It’s fast - 40k products in 2 minutes - It works!

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composer.json

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container.php

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database.php

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settings.php

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depot_locator.module

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Project folder structure

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as a CMS platform Drupal is great!

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Cherry pick what you need! Symfony Components

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Try it yourself! Decoupled code

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Right tool Choose wisely!

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@super_marek