--- /dev/null
+<?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\Debug;
+
+use Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher as BaseTraceableEventDispatcher;
+use Symfony\Component\HttpKernel\Profiler\Profiler;
+use Symfony\Component\HttpKernel\KernelEvents;
+use Symfony\Component\EventDispatcher\Event;
+
+/**
+ * Collects some data about event listeners.
+ *
+ * This event dispatcher delegates the dispatching to another one.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class TraceableEventDispatcher extends BaseTraceableEventDispatcher
+{
+ /**
+ * Sets the profiler.
+ *
+ * The traceable event dispatcher does not use the profiler anymore.
+ * The job is now done directly by the Profiler listener and the
+ * data collectors themselves.
+ *
+ * @param Profiler|null $profiler A Profiler instance
+ *
+ * @deprecated since version 2.4, to be removed in 3.0.
+ */
+ public function setProfiler(Profiler $profiler = null)
+ {
+ @trigger_error('The '.__METHOD__.' method is deprecated since version 2.4 and will be removed in 3.0.', E_USER_DEPRECATED);
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function preDispatch($eventName, Event $event)
+ {
+ switch ($eventName) {
+ case KernelEvents::REQUEST:
+ $this->stopwatch->openSection();
+ break;
+ case KernelEvents::VIEW:
+ case KernelEvents::RESPONSE:
+ // stop only if a controller has been executed
+ if ($this->stopwatch->isStarted('controller')) {
+ $this->stopwatch->stop('controller');
+ }
+ break;
+ case KernelEvents::TERMINATE:
+ $token = $event->getResponse()->headers->get('X-Debug-Token');
+ // There is a very special case when using built-in AppCache class as kernel wrapper, in the case
+ // of an ESI request leading to a `stale` response [B] inside a `fresh` cached response [A].
+ // In this case, `$token` contains the [B] debug token, but the open `stopwatch` section ID
+ // is equal to the [A] debug token. Trying to reopen section with the [B] token throws an exception
+ // which must be caught.
+ try {
+ $this->stopwatch->openSection($token);
+ } catch (\LogicException $e) {
+ }
+ break;
+ }
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function postDispatch($eventName, Event $event)
+ {
+ switch ($eventName) {
+ case KernelEvents::CONTROLLER:
+ $this->stopwatch->start('controller', 'section');
+ break;
+ case KernelEvents::RESPONSE:
+ $token = $event->getResponse()->headers->get('X-Debug-Token');
+ $this->stopwatch->stopSection($token);
+ break;
+ case KernelEvents::TERMINATE:
+ // In the special case described in the `preDispatch` method above, the `$token` section
+ // does not exist, then closing it throws an exception which must be caught.
+ $token = $event->getResponse()->headers->get('X-Debug-Token');
+ try {
+ $this->stopwatch->stopSection($token);
+ } catch (\LogicException $e) {
+ }
+ break;
+ }
+ }
+}