README

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Service Container is an API module based on ctools to enable a Drupal 7 quick and easy lightweight service container with 100% unit test coverage.

It is very similar in syntax to a Symfony container, but was written from scratch as a symfony dependency was not wanted - using some of Drupal 8 Core and Component directly. They will likely depend on a drupal8core project in the future - but for now the copy is fine.

This allows to use an extensible service container (like in Drupal 8) and write modules in Drupal 7 as if they were using Drupal 8.

The main benefit is being able to use unit testing but also to write Drupal 7 module with Drupal 8 style of coding in mind.

The module uses PHP Unit and travis.yml, but the tests and a composer.json are isolated in the tests/ directory, so no vendor or composer multi map is needed by default.

It was originally written for the render_cache module, but since then others have expressed interest in using it, so it was split it out and made a dependency of render_cache instead.

You need:

registry_autoload

or any other PSR-4 autoloader.

Registering CTools plugins

By default the service_container supports CTools discovery, to register your plugins all you need to do is:

    $parameters['ctools_plugins_auto_discovery']['render_cache'] = TRUE

And you can then get a plugin via:

    $rcc = \Drupal::service('render_cache.controller')->createInstance('block');

Because the plugin managers implement the whole discovery interface, you can get all definitions with ease.

  $plugins = \Drupal::service('render_cache.controller')->getDefinitions();

Your plugin itself looks like:

cat modules/render_cache_block/src/RenderCache/Controller/block.inc

$plugin = array(
  'class' => "\\Drupal\\render_cache_block\\RenderCache\\Controller\\BlockController",
  'arguments' => array('@render_stack', '@render_cache.cache'),
);

So you can use normal container parameter syntax.

Provides the following services:

module handler ('module_handler') and module installer ('module_installer')
service container ('service_container')
database ('database')
key value store ('keyvalue', 'keyvalue.database')
variable, a wrapper for variable_get() / variable_set()
A lock ('lock')
A wrapper for url() / l() ('url_generator', 'link_generator')
Flood, a wrapper for the flood mechanisms
Messenger, a wrapper for displaying messages
Drupal 7 Legacy, a wrapper for accessing the Drupal 7 legacy functions.
More to come...

Testing

service_container is tested via PHPUnit for code correctness. (run ./tests/run-tests.sh)
service_container is tested via simpletest for integration with Drupal. (run ./tests/run-simpletests.sh)
service_container is tested via PHPUnit for code coverage. (run ./tests/run-coverage.sh)

List of Drupal 8 core services that we've altered

See the file HACK.md for more details.

lionsad / service_container

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