Drupal 8 uses Symfony components and introduces new initiatives like configuration management, web services, and multilingual support. It has a new directory structure and uses the Symfony class loader, dependency injection, routing and other components. Configuration is now managed through a configuration API and stored in the active config store and codebase for easier migration. Web services allow Drupal to act as a RESTful API. The system supports multilingual content out of the box.

1. Drupal 8
What’s coming?
Piyuesh kumar
QED42

3. AGENDA
√ Drupal 8 Directory Structure
√ Core Initiatives
√ Symfony Components
√ Q&A

4. Drupal 8 Directory Structure
Lets take a look at it?

5. Core Initiatives
√ Configuration Management
√ Web Services
√ Multilingual
√ HTML 5
√ Mobile

6. Configuration Management

7. Configuration Management
When to save configuration data?
√UI changes (automatic): When the save button is
clicked on an admin page, data gets written to the
active store as well as db.
√Code changes (manual): use
admin/config/development/sync to sync the config in
code with db and active store.

8. Configuration Management
√ Advantages:
√ No need to load the complete data from variables
table now. Use the config api to fetch only the
required configs.
√ Easier to move configurations b/w dev and
production instances.

9. Example
// Load a set of configuration out of the active store.
// 'prefix.name' refers to the filename of the .yml file, without the
extension.(prefix = module name and name = settings name)
$config = config('prefix.name');
// Access a single value out of the store.
echo $config->get('my.value');
// Change a value and save it back to both the active store and
the filesystem.
$config->set('my.value’, 'my new value');
$config->save();

10. Web Services
√ Exposes drupal content, making drupal a resful
service provider.
√ Service module in core, even better…
√ Example:
curl -i -H "Accept: application/json" --cookie SESSxxx
http://d8.dev.local/node/1

12. Multilingual
√ Language selection while installation.
√ Translatable entities.

13. HTML5
$form['telephone'] = array(
'#type' => 'tel',
'#title' => t('Phone'),
);
$form['website'] = array(
'#type' => 'url',
'#title' => t('Website'),
);
$form['email'] = array(
'#type' => 'email',
'#title' => t('Email'),

16. Mobile Initiative
√ Responsiveness for all the drupal 8 themes.
√ Decoupling of layouts and themes.
√ Drupal being resful allows creating native
apps also easier.
√ Everything is a block now.

20. Symfony Components
√ Class-Loader
√ Dependency-injection
√ Event Dispatcher
√ Http Foundation
√ Http Kernel
√ Routing
√ Yaml
√ Validator
√ Translation
√ Serializer

21. Symfony Components
√ ClassLoader: Component loads your project classes
automatically if they follow some standard PHP
conventions.
√ Dependency Injection: component allows you to
standardize and centralize the way objects are
constructed in your application.
√ Event Dispatcher: component implements the
Observer pattern in a simple and effective way to
make all these things possible and to make your
projects truly extensible.

22. Symfony Components
√ HttpFoundation: Component defines an object-
oriented layer for the HTTP specification.
√ HttpKernel: notifies events to convert a Request
object to a Response one.
√ Routing: allows mapping from a URL pattern to a
controller.
√ Yaml: loads and dumps yml files used for config
management.
√ Serializer: Component is meant to be used to
turn objects into a specific format (XML, JSON,
Yaml, ...) and the other way around.

23. Symfony components
√ This component is based on the JSR-303 Bean
Validation specification and enables specifying
validation rules for classes using XML, YAML, PHP
or annotations, which can then be checked against
instances of these classes.
√ Translation provides for internationalization. Helps in
abstracting strings and other locale-specific pieces
out of your application and into a layer where they
can be translated and converted based on the
user's locale
√ The Process Component executes commands in
sub-processes.

24. Thank You!!
Questions?