From 972297ab44e9e6ac76d9468198b3f4dd5854306c Mon Sep 17 00:00:00 2001
From: Nicolas Grekas <nicolas.grekas@gmail.com>
Date: Wed, 25 Oct 2017 13:36:10 +0200
Subject: [PATCH] [HttpFoundation][HttpKernel] Move ServiceResetListener logic
 to RequestStack

---
 .../Resources/config/services.xml             |  6 --
 .../ResettableServicePass.php                 | 15 ++--
 .../EventListener/ServiceResetListener.php    | 50 ------------
 .../HttpKernel/ResettingRequestStack.php      | 49 ++++++++++++
 .../ResettableServicePassTest.php             | 33 ++------
 .../ServiceResetListenerTest.php              | 77 -------------------
 .../Tests/ResettingRequestStackTest.php       | 55 +++++++++++++
 .../Component/HttpKernel/composer.json        |  2 +-
 8 files changed, 115 insertions(+), 172 deletions(-)
 delete mode 100644 src/Symfony/Component/HttpKernel/EventListener/ServiceResetListener.php
 create mode 100644 src/Symfony/Component/HttpKernel/ResettingRequestStack.php
 delete mode 100644 src/Symfony/Component/HttpKernel/Tests/EventListener/ServiceResetListenerTest.php
 create mode 100644 src/Symfony/Component/HttpKernel/Tests/ResettingRequestStackTest.php

diff --git a/src/Symfony/Bundle/FrameworkBundle/Resources/config/services.xml b/src/Symfony/Bundle/FrameworkBundle/Resources/config/services.xml
index 31ca2075e4a98..dea49cbc00538 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Resources/config/services.xml
+++ b/src/Symfony/Bundle/FrameworkBundle/Resources/config/services.xml
@@ -74,11 +74,5 @@
         <service id="Symfony\Component\Config\Resource\SelfCheckingResourceChecker">
             <tag name="config_cache.resource_checker" priority="-990" />
         </service>
-
-        <service id="Symfony\Component\HttpKernel\EventListener\ServiceResetListener">
-            <argument /> <!-- ResettableServicePass will inject an iterator of initialized services here ($serviceId => $serviceInstance) -->
-            <argument type="collection" /> <!-- ResettableServicePass will inject an array of reset methods here ($serviceId => $method) -->
-            <tag name="kernel.event_subscriber" />
-        </service>
     </services>
 </container>
diff --git a/src/Symfony/Component/HttpKernel/DependencyInjection/ResettableServicePass.php b/src/Symfony/Component/HttpKernel/DependencyInjection/ResettableServicePass.php
index 56cd059284afe..28212b333ed87 100644
--- a/src/Symfony/Component/HttpKernel/DependencyInjection/ResettableServicePass.php
+++ b/src/Symfony/Component/HttpKernel/DependencyInjection/ResettableServicePass.php
@@ -17,7 +17,7 @@
 use Symfony\Component\DependencyInjection\ContainerInterface;
 use Symfony\Component\DependencyInjection\Exception\RuntimeException;
 use Symfony\Component\DependencyInjection\Reference;
-use Symfony\Component\HttpKernel\EventListener\ServiceResetListener;
+use Symfony\Component\HttpKernel\ResettingRequestStack;
 
 /**
  * @author Alexander M. Turek <me@derrabus.de>
@@ -39,7 +39,7 @@ public function __construct($tagName = 'kernel.reset')
      */
     public function process(ContainerBuilder $container)
     {
-        if (!$container->has(ServiceResetListener::class)) {
+        if (!$container->has('request_stack')) {
             return;
         }
 
@@ -56,14 +56,9 @@ public function process(ContainerBuilder $container)
             $methods[$id] = $attributes['method'];
         }
 
-        if (empty($services)) {
-            $container->removeDefinition(ServiceResetListener::class);
-
-            return;
+        if (!empty($services)) {
+            $container->register('request_stack', ResettingRequestStack::class)
+                ->setArguments(array(new IteratorArgument($services), $methods));
         }
-
-        $container->findDefinition(ServiceResetListener::class)
-            ->replaceArgument(0, new IteratorArgument($services))
-            ->replaceArgument(1, $methods);
     }
 }
diff --git a/src/Symfony/Component/HttpKernel/EventListener/ServiceResetListener.php b/src/Symfony/Component/HttpKernel/EventListener/ServiceResetListener.php
deleted file mode 100644
index cf6d15930315f..0000000000000
--- a/src/Symfony/Component/HttpKernel/EventListener/ServiceResetListener.php
+++ /dev/null
@@ -1,50 +0,0 @@
-<?php
-
-/*
- * This file is part of the Symfony package.
- *
- * (c) Fabien Potencier <fabien@symfony.com>
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
-namespace Symfony\Component\HttpKernel\EventListener;
-
-use Symfony\Component\EventDispatcher\EventSubscriberInterface;
-use Symfony\Component\HttpKernel\KernelEvents;
-
-/**
- * Clean up services between requests.
- *
- * @author Alexander M. Turek <me@derrabus.de>
- */
-class ServiceResetListener implements EventSubscriberInterface
-{
-    private $services;
-    private $resetMethods;
-
-    public function __construct(\Traversable $services, array $resetMethods)
-    {
-        $this->services = $services;
-        $this->resetMethods = $resetMethods;
-    }
-
-    public function onKernelTerminate()
-    {
-        foreach ($this->services as $id => $service) {
-            $method = $this->resetMethods[$id];
-            $service->$method();
-        }
-    }
-
-    /**
-     * {@inheritdoc}
-     */
-    public static function getSubscribedEvents()
-    {
-        return array(
-            KernelEvents::TERMINATE => array('onKernelTerminate', -2048),
-        );
-    }
-}
diff --git a/src/Symfony/Component/HttpKernel/ResettingRequestStack.php b/src/Symfony/Component/HttpKernel/ResettingRequestStack.php
new file mode 100644
index 0000000000000..455ae3dec64fe
--- /dev/null
+++ b/src/Symfony/Component/HttpKernel/ResettingRequestStack.php
@@ -0,0 +1,49 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\HttpKernel;
+
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\RequestStack;
+
+/**
+ * Resets services on second master requests.
+ *
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+class ResettingRequestStack extends RequestStack
+{
+    private $resetNeeded = false;
+    private $resettableServices;
+    private $resetMethods;
+
+    public function __construct(\Traversable $resettableServices, array $resetMethods)
+    {
+        $this->resettableServices = $resettableServices;
+        $this->resetMethods = $resetMethods;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function push(Request $request)
+    {
+        if ($this->resetNeeded && !$this->getCurrentRequest()) {
+            foreach ($this->resettableServices as $id => $service) {
+                $service->{$this->resetMethods[$id]}();
+            }
+        } else {
+            $this->resetNeeded = true;
+        }
+
+        parent::push($request);
+    }
+}
diff --git a/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/ResettableServicePassTest.php b/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/ResettableServicePassTest.php
index c998ef2eaf086..3d651c8e4ee55 100644
--- a/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/ResettableServicePassTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/ResettableServicePassTest.php
@@ -7,8 +7,8 @@
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 use Symfony\Component\DependencyInjection\Reference;
+use Symfony\Component\HttpFoundation\RequestStack;
 use Symfony\Component\HttpKernel\DependencyInjection\ResettableServicePass;
-use Symfony\Component\HttpKernel\EventListener\ServiceResetListener;
 use Symfony\Component\HttpKernel\Tests\Fixtures\ClearableService;
 use Symfony\Component\HttpKernel\Tests\Fixtures\ResettableService;
 
@@ -24,14 +24,13 @@ public function testCompilerPass()
             ->setPublic(true)
             ->addTag('kernel.reset', array('method' => 'clear'));
 
-        $container->register(ServiceResetListener::class)
-            ->setPublic(true)
-            ->setArguments(array(null, array()));
+        $container->register('request_stack', RequestStack::class)
+            ->setPublic(true);
         $container->addCompilerPass(new ResettableServicePass('kernel.reset'));
 
         $container->compile();
 
-        $definition = $container->getDefinition(ServiceResetListener::class);
+        $definition = $container->getDefinition('request_stack');
 
         $this->assertEquals(
             array(
@@ -57,32 +56,10 @@ public function testMissingMethod()
         $container = new ContainerBuilder();
         $container->register(ResettableService::class)
             ->addTag('kernel.reset');
-        $container->register(ServiceResetListener::class)
+        $container->register('request_stack', RequestStack::class)
             ->setArguments(array(null, array()));
         $container->addCompilerPass(new ResettableServicePass('kernel.reset'));
 
         $container->compile();
     }
-
-    public function testCompilerPassWithoutResetters()
-    {
-        $container = new ContainerBuilder();
-        $container->register(ServiceResetListener::class)
-            ->setArguments(array(null, array()));
-        $container->addCompilerPass(new ResettableServicePass());
-
-        $container->compile();
-
-        $this->assertFalse($container->has(ServiceResetListener::class));
-    }
-
-    public function testCompilerPassWithoutListener()
-    {
-        $container = new ContainerBuilder();
-        $container->addCompilerPass(new ResettableServicePass());
-
-        $container->compile();
-
-        $this->assertFalse($container->has(ServiceResetListener::class));
-    }
 }
diff --git a/src/Symfony/Component/HttpKernel/Tests/EventListener/ServiceResetListenerTest.php b/src/Symfony/Component/HttpKernel/Tests/EventListener/ServiceResetListenerTest.php
deleted file mode 100644
index 603d11b2bf412..0000000000000
--- a/src/Symfony/Component/HttpKernel/Tests/EventListener/ServiceResetListenerTest.php
+++ /dev/null
@@ -1,77 +0,0 @@
-<?php
-
-namespace Symfony\Component\HttpKernel\Tests\EventListener;
-
-use PHPUnit\Framework\TestCase;
-use Symfony\Component\DependencyInjection\Argument\IteratorArgument;
-use Symfony\Component\DependencyInjection\ContainerBuilder;
-use Symfony\Component\DependencyInjection\ContainerInterface;
-use Symfony\Component\DependencyInjection\Reference;
-use Symfony\Component\HttpKernel\EventListener\ServiceResetListener;
-use Symfony\Component\HttpKernel\Tests\Fixtures\ClearableService;
-use Symfony\Component\HttpKernel\Tests\Fixtures\ResettableService;
-
-class ServiceResetListenerTest extends TestCase
-{
-    protected function setUp()
-    {
-        ResettableService::$counter = 0;
-        ClearableService::$counter = 0;
-    }
-
-    public function testResetServicesNoOp()
-    {
-        $container = $this->buildContainer();
-        $container->get('reset_subscriber')->onKernelTerminate();
-
-        $this->assertEquals(0, ResettableService::$counter);
-        $this->assertEquals(0, ClearableService::$counter);
-    }
-
-    public function testResetServicesPartially()
-    {
-        $container = $this->buildContainer();
-        $container->get('one');
-        $container->get('reset_subscriber')->onKernelTerminate();
-
-        $this->assertEquals(1, ResettableService::$counter);
-        $this->assertEquals(0, ClearableService::$counter);
-    }
-
-    public function testResetServicesTwice()
-    {
-        $container = $this->buildContainer();
-        $container->get('one');
-        $container->get('reset_subscriber')->onKernelTerminate();
-        $container->get('two');
-        $container->get('reset_subscriber')->onKernelTerminate();
-
-        $this->assertEquals(2, ResettableService::$counter);
-        $this->assertEquals(1, ClearableService::$counter);
-    }
-
-    /**
-     * @return ContainerBuilder
-     */
-    private function buildContainer()
-    {
-        $container = new ContainerBuilder();
-        $container->register('one', ResettableService::class)->setPublic(true);
-        $container->register('two', ClearableService::class)->setPublic(true);
-
-        $container->register('reset_subscriber', ServiceResetListener::class)
-            ->setPublic(true)
-            ->addArgument(new IteratorArgument(array(
-                'one' => new Reference('one', ContainerInterface::IGNORE_ON_UNINITIALIZED_REFERENCE),
-                'two' => new Reference('two', ContainerInterface::IGNORE_ON_UNINITIALIZED_REFERENCE),
-            )))
-            ->addArgument(array(
-                'one' => 'reset',
-                'two' => 'clear',
-            ));
-
-        $container->compile();
-
-        return $container;
-    }
-}
diff --git a/src/Symfony/Component/HttpKernel/Tests/ResettingRequestStackTest.php b/src/Symfony/Component/HttpKernel/Tests/ResettingRequestStackTest.php
new file mode 100644
index 0000000000000..b67409f89dffc
--- /dev/null
+++ b/src/Symfony/Component/HttpKernel/Tests/ResettingRequestStackTest.php
@@ -0,0 +1,55 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\HttpFoundation\Tests;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpKernel\ResettingRequestStack;
+use Symfony\Component\HttpKernel\Tests\Fixtures\ResettableService;
+
+class ResettingRequestStackTest extends TestCase
+{
+    protected function setUp()
+    {
+        ResettableService::$counter = 0;
+    }
+
+    public function testResetServicesNoOp()
+    {
+        $requestStack = new ResettingRequestStack(new \ArrayIterator(array(new ResettableService())), array('reset'));
+
+        $masterRequest = Request::create('/foo');
+
+        $requestStack->push($masterRequest);
+
+        $this->assertEquals(0, ResettableService::$counter);
+    }
+
+    public function testResetServices()
+    {
+        $requestStack = new ResettingRequestStack(new \ArrayIterator(array(new ResettableService())), array('reset'));
+
+        $masterRequest = Request::create('/foo');
+
+        $requestStack->push($masterRequest);
+        $this->assertEquals(0, ResettableService::$counter);
+
+        $requestStack->pop();
+        $this->assertEquals(0, ResettableService::$counter);
+
+        $requestStack->push($masterRequest);
+        $this->assertEquals(1, ResettableService::$counter);
+
+        $requestStack->push($masterRequest);
+        $this->assertEquals(1, ResettableService::$counter);
+    }
+}
diff --git a/src/Symfony/Component/HttpKernel/composer.json b/src/Symfony/Component/HttpKernel/composer.json
index 2d134e5b14943..63f0222317460 100644
--- a/src/Symfony/Component/HttpKernel/composer.json
+++ b/src/Symfony/Component/HttpKernel/composer.json
@@ -18,7 +18,7 @@
     "require": {
         "php": "^5.5.9|>=7.0.8",
         "symfony/event-dispatcher": "~2.8|~3.0|~4.0",
-        "symfony/http-foundation": "^3.3.11|~4.0",
+        "symfony/http-foundation": "^3.4|~4.0",
         "symfony/debug": "~2.8|~3.0|~4.0",
         "psr/log": "~1.0"
     },

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