[SymfonyCache] Remove event classes from Symfony's class cache to fix #242

DependencyInjection/Compiler/RemoveClassesFromCachePass.php

@@ -0,0 +1,57 @@
+<?php
+
+/*
+ * This file is part of the FOSHttpCacheBundle package.
+ *
+ * (c) FriendsOfSymfony <http://friendsofsymfony.github.com/>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace FOS\HttpCacheBundle\DependencyInjection\Compiler;
+
+use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+
+/**
+ * Compiler pass to remove some classes from Symfony's class cache to prevent
+ * from redeclaration in early cache lookup phase
+ * (see https://github.com/FriendsOfSymfony/FOSHttpCacheBundle/issues/242).
+ */
+class RemoveClassesFromCachePass implements CompilerPassInterface
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function process(ContainerBuilder $container)
+    {
+        if (!$container->hasParameter('fos_http_cache.invalidation.enabled')) {
+            return;
+        }
+
+        $frameworkExt = $container->getExtension('framework');
+        $classes = $frameworkExt->getClassesToCompile();
+
+        // remove classes
+        $classesToRemove = array(
+            'Symfony\\Component\\EventDispatcher\\Event',
+            'Symfony\\Component\\HttpKernel\\Event\\KernelEvent',
+            'Symfony\\Component\\HttpKernel\\Event\\FilterControllerEvent',
+            'Symfony\\Component\\HttpKernel\\Event\\FilterResponseEvent',
+            'Symfony\\Component\\HttpKernel\\Event\\GetResponseEvent',
+            'Symfony\\Component\\HttpKernel\\Event\\GetResponseForControllerResultEvent',
+            'Symfony\\Component\\HttpKernel\\Event\\GetResponseForExceptionEvent',
+        );
+        foreach ($classesToRemove as $className) {
+            $index = array_search($className, $classes);
+            array_splice($classes, $index, 1);
+        }
+
+        // overwrite array for class cache via reflection (no other way)
+        $reflClass = new \ReflectionClass('Symfony\\Component\\HttpKernel\\DependencyInjection\\Extension');
+        $reflProp = $reflClass->getProperty('classes');
+        $reflProp->setAccessible(true);
+        $reflProp->setValue($frameworkExt, $classes);
+    }
+}

DependencyInjection/FOSHttpCacheExtension.php

@@ -100,6 +100,7 @@ public function load(array $configs, ContainerBuilder $container)
             if (!empty($config['invalidation']['rules'])) {
                 $this->loadInvalidatorRules($container, $config['invalidation']['rules']);
             }
+            $container->setParameter($this->getAlias().'.invalidation.enabled', true);
         }
 
         if ($config['user_context']['enabled']) {

FOSHttpCacheBundle.php

@@ -15,6 +15,7 @@
 use FOS\HttpCacheBundle\DependencyInjection\Compiler\SecurityContextPass;
 use FOS\HttpCacheBundle\DependencyInjection\Compiler\TagSubscriberPass;
 use FOS\HttpCacheBundle\DependencyInjection\Compiler\HashGeneratorPass;
+use FOS\HttpCacheBundle\DependencyInjection\Compiler\RemoveClassesFromCachePass;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\HttpKernel\Bundle\Bundle;
 
@@ -29,5 +30,6 @@ public function build(ContainerBuilder $container)
         $container->addCompilerPass(new SecurityContextPass());
         $container->addCompilerPass(new TagSubscriberPass());
         $container->addCompilerPass(new HashGeneratorPass());
+        $container->addCompilerPass(new RemoveClassesFromCachePass());
     }
 }