vendor/symfony/event-dispatcher/Debug/TraceableEventDispatcher.php line 195

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  1. <?php
  2. /*
  3.  * This file is part of the Symfony package.
  4.  *
  5.  * (c) Fabien Potencier <fabien@symfony.com>
  6.  *
  7.  * For the full copyright and license information, please view the LICENSE
  8.  * file that was distributed with this source code.
  9.  */
  10. namespace Symfony\Component\EventDispatcher\Debug;
  11. use Psr\EventDispatcher\StoppableEventInterface;
  12. use Psr\Log\LoggerInterface;
  13. use Symfony\Component\EventDispatcher\EventDispatcherInterface;
  14. use Symfony\Component\EventDispatcher\EventSubscriberInterface;
  15. use Symfony\Component\HttpFoundation\Request;
  16. use Symfony\Component\HttpFoundation\RequestStack;
  17. use Symfony\Component\Stopwatch\Stopwatch;
  18. use Symfony\Contracts\Service\ResetInterface;
  19. /**
  20.  * Collects some data about event listeners.
  21.  *
  22.  * This event dispatcher delegates the dispatching to another one.
  23.  *
  24.  * @author Fabien Potencier <fabien@symfony.com>
  25.  */
  26. class TraceableEventDispatcher implements EventDispatcherInterfaceResetInterface
  27. {
  28.     protected $logger;
  29.     protected $stopwatch;
  30.     /**
  31.      * @var \SplObjectStorage<WrappedListener, array{string, string}>
  32.      */
  33.     private $callStack;
  34.     private $dispatcher;
  35.     private $wrappedListeners;
  36.     private $orphanedEvents;
  37.     private $requestStack;
  38.     private $currentRequestHash '';
  39.     public function __construct(EventDispatcherInterface $dispatcherStopwatch $stopwatchLoggerInterface $logger nullRequestStack $requestStack null)
  40.     {
  41.         $this->dispatcher $dispatcher;
  42.         $this->stopwatch $stopwatch;
  43.         $this->logger $logger;
  44.         $this->wrappedListeners = [];
  45.         $this->orphanedEvents = [];
  46.         $this->requestStack $requestStack;
  47.     }
  48.     /**
  49.      * {@inheritdoc}
  50.      */
  51.     public function addListener(string $eventName$listenerint $priority 0)
  52.     {
  53.         $this->dispatcher->addListener($eventName$listener$priority);
  54.     }
  55.     /**
  56.      * {@inheritdoc}
  57.      */
  58.     public function addSubscriber(EventSubscriberInterface $subscriber)
  59.     {
  60.         $this->dispatcher->addSubscriber($subscriber);
  61.     }
  62.     /**
  63.      * {@inheritdoc}
  64.      */
  65.     public function removeListener(string $eventName$listener)
  66.     {
  67.         if (isset($this->wrappedListeners[$eventName])) {
  68.             foreach ($this->wrappedListeners[$eventName] as $index => $wrappedListener) {
  69.                 if ($wrappedListener->getWrappedListener() === $listener || ($listener instanceof \Closure && $wrappedListener->getWrappedListener() == $listener)) {
  70.                     $listener $wrappedListener;
  71.                     unset($this->wrappedListeners[$eventName][$index]);
  72.                     break;
  73.                 }
  74.             }
  75.         }
  76.         return $this->dispatcher->removeListener($eventName$listener);
  77.     }
  78.     /**
  79.      * {@inheritdoc}
  80.      */
  81.     public function removeSubscriber(EventSubscriberInterface $subscriber)
  82.     {
  83.         return $this->dispatcher->removeSubscriber($subscriber);
  84.     }
  85.     /**
  86.      * {@inheritdoc}
  87.      */
  88.     public function getListeners(string $eventName null)
  89.     {
  90.         return $this->dispatcher->getListeners($eventName);
  91.     }
  92.     /**
  93.      * {@inheritdoc}
  94.      */
  95.     public function getListenerPriority(string $eventName$listener)
  96.     {
  97.         // we might have wrapped listeners for the event (if called while dispatching)
  98.         // in that case get the priority by wrapper
  99.         if (isset($this->wrappedListeners[$eventName])) {
  100.             foreach ($this->wrappedListeners[$eventName] as $wrappedListener) {
  101.                 if ($wrappedListener->getWrappedListener() === $listener || ($listener instanceof \Closure && $wrappedListener->getWrappedListener() == $listener)) {
  102.                     return $this->dispatcher->getListenerPriority($eventName$wrappedListener);
  103.                 }
  104.             }
  105.         }
  106.         return $this->dispatcher->getListenerPriority($eventName$listener);
  107.     }
  108.     /**
  109.      * {@inheritdoc}
  110.      */
  111.     public function hasListeners(string $eventName null)
  112.     {
  113.         return $this->dispatcher->hasListeners($eventName);
  114.     }
  115.     /**
  116.      * {@inheritdoc}
  117.      */
  118.     public function dispatch(object $eventstring $eventName null): object
  119.     {
  120.         $eventName $eventName ?? \get_class($event);
  121.         if (null === $this->callStack) {
  122.             $this->callStack = new \SplObjectStorage();
  123.         }
  124.         $currentRequestHash $this->currentRequestHash $this->requestStack && ($request $this->requestStack->getCurrentRequest()) ? spl_object_hash($request) : '';
  125.         if (null !== $this->logger && $event instanceof StoppableEventInterface && $event->isPropagationStopped()) {
  126.             $this->logger->debug(sprintf('The "%s" event is already stopped. No listeners have been called.'$eventName));
  127.         }
  128.         $this->preProcess($eventName);
  129.         try {
  130.             $this->beforeDispatch($eventName$event);
  131.             try {
  132.                 $e $this->stopwatch->start($eventName'section');
  133.                 try {
  134.                     $this->dispatcher->dispatch($event$eventName);
  135.                 } finally {
  136.                     if ($e->isStarted()) {
  137.                         $e->stop();
  138.                     }
  139.                 }
  140.             } finally {
  141.                 $this->afterDispatch($eventName$event);
  142.             }
  143.         } finally {
  144.             $this->currentRequestHash $currentRequestHash;
  145.             $this->postProcess($eventName);
  146.         }
  147.         return $event;
  148.     }
  149.     /**
  150.      * @return array
  151.      */
  152.     public function getCalledListeners(Request $request null)
  153.     {
  154.         if (null === $this->callStack) {
  155.             return [];
  156.         }
  157.         $hash $request spl_object_hash($request) : null;
  158.         $called = [];
  159.         foreach ($this->callStack as $listener) {
  160.             [$eventName$requestHash] = $this->callStack->getInfo();
  161.             if (null === $hash || $hash === $requestHash) {
  162.                 $called[] = $listener->getInfo($eventName);
  163.             }
  164.         }
  165.         return $called;
  166.     }
  167.     /**
  168.      * @return array
  169.      */
  170.     public function getNotCalledListeners(Request $request null)
  171.     {
  172.         try {
  173.             $allListeners $this->getListeners();
  174.         } catch (\Exception $e) {
  175.             if (null !== $this->logger) {
  176.                 $this->logger->info('An exception was thrown while getting the uncalled listeners.', ['exception' => $e]);
  177.             }
  178.             // unable to retrieve the uncalled listeners
  179.             return [];
  180.         }
  181.         $hash $request spl_object_hash($request) : null;
  182.         $calledListeners = [];
  183.         if (null !== $this->callStack) {
  184.             foreach ($this->callStack as $calledListener) {
  185.                 [, $requestHash] = $this->callStack->getInfo();
  186.                 if (null === $hash || $hash === $requestHash) {
  187.                     $calledListeners[] = $calledListener->getWrappedListener();
  188.                 }
  189.             }
  190.         }
  191.         $notCalled = [];
  192.         foreach ($allListeners as $eventName => $listeners) {
  193.             foreach ($listeners as $listener) {
  194.                 if (!\in_array($listener$calledListenerstrue)) {
  195.                     if (!$listener instanceof WrappedListener) {
  196.                         $listener = new WrappedListener($listenernull$this->stopwatch$this);
  197.                     }
  198.                     $notCalled[] = $listener->getInfo($eventName);
  199.                 }
  200.             }
  201.         }
  202.         uasort($notCalled, [$this'sortNotCalledListeners']);
  203.         return $notCalled;
  204.     }
  205.     public function getOrphanedEvents(Request $request null): array
  206.     {
  207.         if ($request) {
  208.             return $this->orphanedEvents[spl_object_hash($request)] ?? [];
  209.         }
  210.         if (!$this->orphanedEvents) {
  211.             return [];
  212.         }
  213.         return array_merge(...array_values($this->orphanedEvents));
  214.     }
  215.     public function reset()
  216.     {
  217.         $this->callStack null;
  218.         $this->orphanedEvents = [];
  219.         $this->currentRequestHash '';
  220.     }
  221.     /**
  222.      * Proxies all method calls to the original event dispatcher.
  223.      *
  224.      * @param string $method    The method name
  225.      * @param array  $arguments The method arguments
  226.      *
  227.      * @return mixed
  228.      */
  229.     public function __call(string $method, array $arguments)
  230.     {
  231.         return $this->dispatcher->{$method}(...$arguments);
  232.     }
  233.     /**
  234.      * Called before dispatching the event.
  235.      */
  236.     protected function beforeDispatch(string $eventNameobject $event)
  237.     {
  238.     }
  239.     /**
  240.      * Called after dispatching the event.
  241.      */
  242.     protected function afterDispatch(string $eventNameobject $event)
  243.     {
  244.     }
  245.     private function preProcess(string $eventName): void
  246.     {
  247.         if (!$this->dispatcher->hasListeners($eventName)) {
  248.             $this->orphanedEvents[$this->currentRequestHash][] = $eventName;
  249.             return;
  250.         }
  251.         foreach ($this->dispatcher->getListeners($eventName) as $listener) {
  252.             $priority $this->getListenerPriority($eventName$listener);
  253.             $wrappedListener = new WrappedListener($listener instanceof WrappedListener $listener->getWrappedListener() : $listenernull$this->stopwatch$this);
  254.             $this->wrappedListeners[$eventName][] = $wrappedListener;
  255.             $this->dispatcher->removeListener($eventName$listener);
  256.             $this->dispatcher->addListener($eventName$wrappedListener$priority);
  257.             $this->callStack->attach($wrappedListener, [$eventName$this->currentRequestHash]);
  258.         }
  259.     }
  260.     private function postProcess(string $eventName): void
  261.     {
  262.         unset($this->wrappedListeners[$eventName]);
  263.         $skipped false;
  264.         foreach ($this->dispatcher->getListeners($eventName) as $listener) {
  265.             if (!$listener instanceof WrappedListener) { // #12845: a new listener was added during dispatch.
  266.                 continue;
  267.             }
  268.             // Unwrap listener
  269.             $priority $this->getListenerPriority($eventName$listener);
  270.             $this->dispatcher->removeListener($eventName$listener);
  271.             $this->dispatcher->addListener($eventName$listener->getWrappedListener(), $priority);
  272.             if (null !== $this->logger) {
  273.                 $context = ['event' => $eventName'listener' => $listener->getPretty()];
  274.             }
  275.             if ($listener->wasCalled()) {
  276.                 if (null !== $this->logger) {
  277.                     $this->logger->debug('Notified event "{event}" to listener "{listener}".'$context);
  278.                 }
  279.             } else {
  280.                 $this->callStack->detach($listener);
  281.             }
  282.             if (null !== $this->logger && $skipped) {
  283.                 $this->logger->debug('Listener "{listener}" was not called for event "{event}".'$context);
  284.             }
  285.             if ($listener->stoppedPropagation()) {
  286.                 if (null !== $this->logger) {
  287.                     $this->logger->debug('Listener "{listener}" stopped propagation of the event "{event}".'$context);
  288.                 }
  289.                 $skipped true;
  290.             }
  291.         }
  292.     }
  293.     private function sortNotCalledListeners(array $a, array $b)
  294.     {
  295.         if (!== $cmp strcmp($a['event'], $b['event'])) {
  296.             return $cmp;
  297.         }
  298.         if (\is_int($a['priority']) && !\is_int($b['priority'])) {
  299.             return 1;
  300.         }
  301.         if (!\is_int($a['priority']) && \is_int($b['priority'])) {
  302.             return -1;
  303.         }
  304.         if ($a['priority'] === $b['priority']) {
  305.             return 0;
  306.         }
  307.         if ($a['priority'] > $b['priority']) {
  308.             return -1;
  309.         }
  310.         return 1;
  311.     }
  312. }