Classes List

Symfony\Component\HttpKernel\Debug\TraceableEventDispatcher

 1 
 2 
 3 
 4 
 5 
 6 
 7 
 8 
 9 
 10 
 11 
 12 
 13 
 14 
 15 
 16 
 17 
 18 
 19 
 20 
 21 
 22 
 23 
 24 
 25 
 26 
 27 
 28 
 29 
 30 
 31 
 32 
 33 
 34 
 35 
 36 
 37 
 38 
 39 
 40 
 41 
 42 
 43 
 44 
 45 
 46 
 47 
 48 
 49 
 50 
 51 
 52 
 53 
 54 
 55 
 56 
 57 
 58 
 59 
 60 
 61 
 62 
 63 
 64 
 65 
 66 
 67 
 68 
 69 
 70 
 71 
 72 
 73 
 74 
 75 
 76 
 77 
 78 
 79 
 80 
 81 
 82 
 83 
<?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\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
{
    /** * {@inheritdoc} */
    protected function preDispatch($eventNameEvent $event)
    {
        switch ($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($eventNameEvent $event)
    {
        switch ($eventName) {
            case KernelEvents::CONTROLLER_ARGUMENTS:
                $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;
        }
    }
}