Issue #2909185 by longwave, donquixote, andypost, andregp, pounard, jibran, martin107, kostyashupenko, catch, znerol: Replace ContainerAwareEventDispatcher with Symfony EventDispatcher

core/core.services.yml

@@ -873,8 +873,7 @@ services:
     arguments: ['@request_stack']
   Drupal\Core\Routing\RouteMatchInterface: '@current_route_match'
   event_dispatcher:
-    class: Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher
-    arguments: ['@service_container']
+    class: Symfony\Component\EventDispatcher\EventDispatcher
   Psr\EventDispatcher\EventDispatcherInterface: '@event_dispatcher'
   Symfony\Contracts\EventDispatcher\EventDispatcherInterface: '@event_dispatcher'
   controller_resolver:

core/lib/Drupal/Component/EventDispatcher/ContainerAwareEventDispatcher.php

@@ -2,6 +2,8 @@
 
 namespace Drupal\Component\EventDispatcher;
 
+@trigger_error('The ' . __NAMESPACE__ . '\ContainerAwareEventDispatcher is deprecated in drupal:10.3.0 and is removed from drupal:11.0.0. Use Symfony\Component\EventDispatcher\EventDispatcher instead. See https://www.drupal.org/node/3376090', E_USER_DEPRECATED);
+
 use Psr\EventDispatcher\StoppableEventInterface;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 use Symfony\Component\EventDispatcher\EventDispatcherInterface;
@@ -30,6 +32,11 @@ use Symfony\Component\EventDispatcher\EventSubscriberInterface;
  *     runtime is not affected by this change though.
  *   </dd>
  * </dl>
+ *
+ * @deprecated in drupal:10.3.0 and is removed from drupal:11.0.0. Use
+ *   \Symfony\Component\EventDispatcher\EventDispatcher instead.
+ *
+ * @see https://www.drupal.org/node/3376090
  */
 class ContainerAwareEventDispatcher implements EventDispatcherInterface {
 

core/lib/Drupal/Core/CoreServiceProvider.php

@@ -29,6 +29,7 @@ use Drupal\Core\Site\Settings;
 use Psr\Log\LoggerAwareInterface;
 use Symfony\Component\DependencyInjection\Compiler\PassConfig;
 use Symfony\Component\DependencyInjection\Reference;
+use Symfony\Component\EventDispatcher\DependencyInjection\RegisterListenersPass;
 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
 
 /**
@@ -82,7 +83,7 @@ class CoreServiceProvider implements ServiceProviderInterface, ServiceModifierIn
     $container->addCompilerPass(new TwigExtensionPass());
 
     // Add a compiler pass for registering event subscribers.
-    $container->addCompilerPass(new RegisterEventSubscribersPass(), PassConfig::TYPE_AFTER_REMOVING);
+    $container->addCompilerPass(new RegisterEventSubscribersPass(new RegisterListenersPass()), PassConfig::TYPE_AFTER_REMOVING);
     $container->addCompilerPass(new LoggerAwarePass(), PassConfig::TYPE_AFTER_REMOVING);
 
     $container->addCompilerPass(new RegisterAccessChecksPass());

core/lib/Drupal/Core/DependencyInjection/Compiler/RegisterEventSubscribersPass.php

@@ -4,59 +4,50 @@ namespace Drupal\Core\DependencyInjection\Compiler;
 
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
-use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+use Symfony\Component\EventDispatcher\DependencyInjection\RegisterListenersPass;
 
 /**
- * Registers all event subscribers to the event dispatcher.
+ * Wraps the Symfony event subscriber pass to use different tag names.
  */
 class RegisterEventSubscribersPass implements CompilerPassInterface {
 
+  /**
+   * Constructs a RegisterEventSubscribersPass object.
+   *
+   * @param \Symfony\Component\EventDispatcher\DependencyInjection\RegisterListenersPass $pass
+   *   The Symfony compiler pass that registers event subscribers.
+   */
+  public function __construct(
+    protected RegisterListenersPass $pass
+  ) {}
+
   /**
    * {@inheritdoc}
    */
   public function process(ContainerBuilder $container) {
-    if (!$container->hasDefinition('event_dispatcher')) {
-      return;
-    }
+    $this->renameTag($container, 'event_subscriber', 'kernel.event_subscriber');
+    $this->pass->process($container);
+    $this->renameTag($container, 'kernel.event_subscriber', 'event_subscriber');
+  }
 
-    $definition = $container->getDefinition('event_dispatcher');
-
-    $event_subscriber_info = [];
-    foreach ($container->findTaggedServiceIds('event_subscriber') as $id => $attributes) {
-
-      // We must assume that the class value has been correctly filled, even if
-      // the service is created by a factory.
-      $class = $container->getDefinition($id)->getClass();
-
-      $interface = EventSubscriberInterface::class;
-      if (!is_subclass_of($class, $interface)) {
-        throw new \InvalidArgumentException(sprintf('Service "%s" must implement interface "%s".', $id, $interface));
-      }
-
-      // Get all subscribed events.
-      foreach ($class::getSubscribedEvents() as $event_name => $params) {
-        if (is_string($params)) {
-          $priority = 0;
-          $event_subscriber_info[$event_name][$priority][] = ['service' => [$id, $params]];
-        }
-        elseif (is_string($params[0])) {
-          $priority = $params[1] ?? 0;
-          $event_subscriber_info[$event_name][$priority][] = ['service' => [$id, $params[0]]];
-        }
-        else {
-          foreach ($params as $listener) {
-            $priority = $listener[1] ?? 0;
-            $event_subscriber_info[$event_name][$priority][] = ['service' => [$id, $listener[0]]];
-          }
-        }
+  /**
+   * Renames tags in the container.
+   *
+   * @param \Symfony\Component\DependencyInjection\ContainerBuilder $container
+   *   The container.
+   * @param string $source_tag
+   *   The tag to be renamed.
+   * @param string $target_tag
+   *   The tag to rename with.
+   */
+  protected function renameTag(ContainerBuilder $container, string $source_tag, string $target_tag): void {
+    foreach ($container->getDefinitions() as $definition) {
+      if ($definition->hasTag($source_tag)) {
+        $attributes = $definition->getTag($source_tag)[0];
+        $definition->addTag($target_tag, $attributes);
+        $definition->clearTag($source_tag);
       }
     }
-
-    foreach (array_keys($event_subscriber_info) as $event_name) {
-      krsort($event_subscriber_info[$event_name]);
-    }
-
-    $definition->addArgument($event_subscriber_info);
   }
 
 }

core/modules/layout_builder/tests/src/Unit/SectionRenderTest.php

@@ -4,7 +4,6 @@ declare(strict_types=1);
 
 namespace Drupal\Tests\layout_builder\Unit;
 
-use Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher;
 use Drupal\Component\Plugin\Exception\PluginException;
 use Drupal\Core\Access\AccessResult;
 use Drupal\Core\Block\BlockManagerInterface;
@@ -24,6 +23,7 @@ use Drupal\layout_builder\Section;
 use Drupal\layout_builder\SectionComponent;
 use Drupal\Tests\UnitTestCase;
 use Prophecy\Argument;
+use Symfony\Component\EventDispatcher\EventDispatcher;
 
 /**
  * @coversDefaultClass \Drupal\layout_builder\Section
@@ -62,7 +62,7 @@ class SectionRenderTest extends UnitTestCase {
   /**
    * The event dispatcher.
    *
-   * @var \Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher
+   * @var \Symfony\Component\EventDispatcher\EventDispatcher
    */
   protected $eventDispatcher;
 
@@ -77,7 +77,7 @@ class SectionRenderTest extends UnitTestCase {
     $this->contextHandler = $this->prophesize(ContextHandlerInterface::class);
     $this->contextRepository = $this->prophesize(ContextRepositoryInterface::class);
     // @todo Refactor this into some better tests in https://www.drupal.org/node/2942605.
-    $this->eventDispatcher = (new \ReflectionClass(ContainerAwareEventDispatcher::class))->newInstanceWithoutConstructor();
+    $this->eventDispatcher = (new \ReflectionClass(EventDispatcher::class))->newInstanceWithoutConstructor();
 
     $this->account = $this->prophesize(AccountInterface::class);
     $subscriber = new BlockComponentRenderArray($this->account->reveal());

core/tests/Drupal/Tests/Component/EventDispatcher/ContainerAwareEventDispatcherTest.php

@@ -25,6 +25,7 @@ use Symfony\Bridge\PhpUnit\ExpectDeprecationTrait;
  * synchronizations.
  *
  * @group EventDispatcher
+ * @group legacy
  */
 class ContainerAwareEventDispatcherTest extends TestCase {
 

core/tests/Drupal/Tests/Core/EventSubscriber/RedirectResponseSubscriberTest.php

@@ -4,13 +4,13 @@ declare(strict_types=1);
 
 namespace Drupal\Tests\Core\EventSubscriber;
 
-use Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher as EventDispatcher;
 use Drupal\Core\EventSubscriber\RedirectResponseSubscriber;
 use Drupal\Core\Routing\TrustedRedirectResponse;
 use Drupal\Core\Utility\UnroutedUrlAssemblerInterface;
 use Drupal\Tests\UnitTestCase;
 use Psr\Log\LoggerInterface;
 use Symfony\Component\DependencyInjection\Container;
+use Symfony\Component\EventDispatcher\EventDispatcher;
 use Symfony\Component\HttpFoundation\RedirectResponse;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpKernel\Event\ResponseEvent;
@@ -87,7 +87,7 @@ class RedirectResponseSubscriberTest extends UnitTestCase {
    * @dataProvider providerTestDestinationRedirect
    */
   public function testDestinationRedirect(Request $request, $expected) {
-    $dispatcher = new EventDispatcher(\Drupal::getContainer());
+    $dispatcher = new EventDispatcher();
     $kernel = $this->createMock('Symfony\Component\HttpKernel\HttpKernelInterface');
     $response = new RedirectResponse('http://example.com/drupal');
     $request->headers->set('HOST', 'example.com');
@@ -128,7 +128,7 @@ class RedirectResponseSubscriberTest extends UnitTestCase {
    * @dataProvider providerTestDestinationRedirectToExternalUrl
    */
   public function testDestinationRedirectToExternalUrl($request, $expected) {
-    $dispatcher = new EventDispatcher(\Drupal::getContainer());
+    $dispatcher = new EventDispatcher();
     $kernel = $this->createMock('Symfony\Component\HttpKernel\HttpKernelInterface');
     $response = new RedirectResponse('http://other-example.com');
 
@@ -143,7 +143,7 @@ class RedirectResponseSubscriberTest extends UnitTestCase {
    * @covers ::checkRedirectUrl
    */
   public function testRedirectWithOptInExternalUrl() {
-    $dispatcher = new EventDispatcher(\Drupal::getContainer());
+    $dispatcher = new EventDispatcher();
     $kernel = $this->createMock('Symfony\Component\HttpKernel\HttpKernelInterface');
     $response = new TrustedRedirectResponse('http://external-url.com');
     $request = Request::create('');
@@ -176,7 +176,7 @@ class RedirectResponseSubscriberTest extends UnitTestCase {
    * @dataProvider providerTestDestinationRedirectWithInvalidUrl
    */
   public function testDestinationRedirectWithInvalidUrl(Request $request) {
-    $dispatcher = new EventDispatcher(\Drupal::getContainer());
+    $dispatcher = new EventDispatcher();
     $kernel = $this->createMock('Symfony\Component\HttpKernel\HttpKernelInterface');
     $response = new RedirectResponse('http://example.com/drupal');