This document discusses the key initiatives, components, and features of Drupal 8. It focuses on the major architectural changes including adopting semantic versioning, including configuration management and Twig templates in the core, and using Composer for dependency management. It also outlines the major Symfony components integrated into Drupal 8 to improve the request-response lifecycle and several non-Symfony libraries added to core like Doctrine, Guzzle, and EasyRDF.

1. D8 - Quick bites
Braham Pal Singh
Date: 01 Feb 2017

2. AGENDA
•
Core Initiatives
• SEMantic VERsioning
• Major Components
• Major Features
• Folder Structure
• Symfony Components
• Vendor Libraries In Core
System requirement
•

3. System
requirements

4. System requirements

5. CORE-
INITIATIVES

6. HTML5

7. LAYOUTS

8. MOBILE FIRST

9. MULTILINGUAL

10. VIEWS IN CORE

11. WEB SERVICES

12. SEMANTIC VERSIONING

13. 7.53 => 8.2.3

14. THE NUMBERS
SEMANTIC VERSIONING

15. MAJOR COMPONENTS
IN CORE

16. CONFIGURATION MANAGEMENT
Drush config-export
Drush config-import

17. TWIG TEMPLATES - BENEFITS
MAJOR COMPONENTS IN CORE
• Powerful, supporting macros, i18n, extensions, template
inheritance.
• Secure
• It will bring Symphony and Drupal communities closer, since we
are sharing more and more components
• Filters support
https://github.com/makinacorpus/php-twig-converter

18. WITH CO M POSER
DEPENDENCY MGMT. USING COMPOSER
• PSR-4 autoloader.
• Add composer.json to your custom module X.
• run composer update from webroot.
• Use the PHP library anywhere in the the custom module X or any
other custom Module.

19. FEATURES

20. EDITORIAL EXPERIENCE
WYSIWYG IN CORE

21. EDITORIAL EXPERIENCE
IN PLACE EDITING IN CORE

22. BREAKPOINTS IN CORE
DECLARING BREAKPOINTS AS A PART OF THEME NOT CSS

23. RESPONSIVE IMAGES
RESPONSIVE IMAGES - FALLBACKS FOR IMAGE STYLES

24. PHP UNIT FOR UNIT TESTING
FEATURES
• Actively Maintained.
• Most of the frameworks have shifted down to PHPUNIT e.g.,
symfony, Zend, Cake PHP etc.
• Quicker to test
• Better code coverage compared to simple test.
• Less dependencies & more extensions.
• Integrated with most of the IDEs.

25. IMPROVED CACHING
FEATURES
• Content being rendered are not cache-aware.
• Cache-invalidation is automated for a lot of regions.
• Swappable cache backends
• Introduction of cache contexts for cache variations.
• … and lot more…

26. Drupalconsole

27. DRUPAL 8 FOLDER
STRUCTURE

28. Folder structure

29. SYMFONY
COMPONENTS IN CORE

30. SYMFONY
COM PONENTS
IMPACTING
REQUEST-RESPONSE

31. HTTPFOUNDATION AND HTTPKERNEL
SYMFONY COMPONENTS
• Moving away from concept of hooks & towards Event driven
development.
• Standard Request & Response objects & interacting with them
made super easy
• Drupal built on top of a first-class REST server
• Drupal as a producer now instead of just being a consumer.
• Helped with Web Services and Context Core Initiative
(WSCCI).

32. ROUTIN G
SYMFONY COMPONENTS
• Maps HTTP Request with a set of config variables.
• Routes/paths defined in YAML format as a part of the module
• Action for the routes controlled via module’s classes in D8.

33. EVENT DISPATCHER
SYMFONY COMPONENTS
• Implements Observer pattern
• Starting point for replacement of hook system.
• Powers up the plugin system in D8 as well.

34. CLASSLOADER
SYMFONY COMPONENTS
• Loads project classes when needed rather than loading everything
in the memory always.
• Requires classes to use PSR-4 standard for directory structure.
• namespace DrupalCoreController
• Manual inclusion of classes no longer needed.

35. TWIG
SYMFONY COMPONENTS
• Developed by Fabien, creator of symfony
• Replaces phptemplate engine
• Plays well with other symfony components

36. TWIG
SYMFONY COMPONENTS
• Developed by Fabien, creator of symfony
• Replaces phptemplate engine
• Plays well with other symfony components

37. YAM L
SYMFONY COMPONENTS
• Serves as an integral part for the CMI
• Defining default configuration, exporting configurations from a
site - all YAML
• Good alternative to features module in D7

38. NON-
SYMFONY
COMPONENTS

39. COM PO SER
NON-SYMFONY COMPONENTS

40. DOCTRINE
NON-SYMFONY COMPONENTS
• Drupal 8 uses a part of it called Annotations that exposes
additional metadata to Drupal.

41. GUZZLE
NON-SYMFONY COMPONENTS
• replaces drupal_http_request()
• Can send both synchronous & asynchronous requests
• Multiple-request processing in parallel.
• Allows for streaming response.

42. EASYRDF
NON-SYMFONY COMPONENTS
• Consuming & producing RDF
• Easier debugging using dump methods provided by the library

43. References
• ** https://www.drupal.org/list-changes/drupal
• https://www.sitepoint.com/symfony-drupal-8/
https://www.drupal.com/why-drupal-8
https://dev.acquia.com/blog/drupal-8/10-new-features-in-drupal-8-
core/18/05/2016/6721
•
•

44. Questions?