diff options
Diffstat (limited to 'vendor/symfony/event-dispatcher/Debug/TraceableEventDispatcher.php')
| -rw-r--r-- | vendor/symfony/event-dispatcher/Debug/TraceableEventDispatcher.php | 375 |
1 files changed, 375 insertions, 0 deletions
diff --git a/vendor/symfony/event-dispatcher/Debug/TraceableEventDispatcher.php b/vendor/symfony/event-dispatcher/Debug/TraceableEventDispatcher.php new file mode 100644 index 0000000..53d7c5d --- /dev/null +++ b/vendor/symfony/event-dispatcher/Debug/TraceableEventDispatcher.php @@ -0,0 +1,375 @@ +<?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\EventDispatcher\Debug; + +use Psr\Log\LoggerInterface; +use Symfony\Component\EventDispatcher\Event; +use Symfony\Component\EventDispatcher\EventDispatcherInterface; +use Symfony\Component\EventDispatcher\EventSubscriberInterface; +use Symfony\Component\Stopwatch\Stopwatch; + +/** + * Collects some data about event listeners. + * + * This event dispatcher delegates the dispatching to another one. + * + * @author Fabien Potencier <fabien@symfony.com> + */ +class TraceableEventDispatcher implements TraceableEventDispatcherInterface +{ + protected $logger; + protected $stopwatch; + + private $called; + private $dispatcher; + private $wrappedListeners; + + public function __construct(EventDispatcherInterface $dispatcher, Stopwatch $stopwatch, LoggerInterface $logger = null) + { + $this->dispatcher = $dispatcher; + $this->stopwatch = $stopwatch; + $this->logger = $logger; + $this->called = array(); + $this->wrappedListeners = array(); + } + + /** + * {@inheritdoc} + */ + public function addListener($eventName, $listener, $priority = 0) + { + $this->dispatcher->addListener($eventName, $listener, $priority); + } + + /** + * {@inheritdoc} + */ + public function addSubscriber(EventSubscriberInterface $subscriber) + { + $this->dispatcher->addSubscriber($subscriber); + } + + /** + * {@inheritdoc} + */ + public function removeListener($eventName, $listener) + { + if (isset($this->wrappedListeners[$eventName])) { + foreach ($this->wrappedListeners[$eventName] as $index => $wrappedListener) { + if ($wrappedListener->getWrappedListener() === $listener) { + $listener = $wrappedListener; + unset($this->wrappedListeners[$eventName][$index]); + break; + } + } + } + + return $this->dispatcher->removeListener($eventName, $listener); + } + + /** + * {@inheritdoc} + */ + public function removeSubscriber(EventSubscriberInterface $subscriber) + { + return $this->dispatcher->removeSubscriber($subscriber); + } + + /** + * {@inheritdoc} + */ + public function getListeners($eventName = null) + { + return $this->dispatcher->getListeners($eventName); + } + + /** + * {@inheritdoc} + */ + public function getListenerPriority($eventName, $listener) + { + if (!method_exists($this->dispatcher, 'getListenerPriority')) { + return 0; + } + + return $this->dispatcher->getListenerPriority($eventName, $listener); + } + + /** + * {@inheritdoc} + */ + public function hasListeners($eventName = null) + { + return $this->dispatcher->hasListeners($eventName); + } + + /** + * {@inheritdoc} + */ + public function dispatch($eventName, Event $event = null) + { + if (null === $event) { + $event = new Event(); + } + + if (null !== $this->logger && $event->isPropagationStopped()) { + $this->logger->debug(sprintf('The "%s" event is already stopped. No listeners have been called.', $eventName)); + } + + $this->preProcess($eventName); + $this->preDispatch($eventName, $event); + + $e = $this->stopwatch->start($eventName, 'section'); + + $this->dispatcher->dispatch($eventName, $event); + + if ($e->isStarted()) { + $e->stop(); + } + + $this->postDispatch($eventName, $event); + $this->postProcess($eventName); + + return $event; + } + + /** + * {@inheritdoc} + */ + public function getCalledListeners() + { + $called = array(); + foreach ($this->called as $eventName => $listeners) { + foreach ($listeners as $listener) { + $info = $this->getListenerInfo($listener->getWrappedListener(), $eventName); + $called[$eventName.'.'.$info['pretty']] = $info; + } + } + + return $called; + } + + /** + * {@inheritdoc} + */ + public function getNotCalledListeners() + { + try { + $allListeners = $this->getListeners(); + } catch (\Exception $e) { + if (null !== $this->logger) { + $this->logger->info('An exception was thrown while getting the uncalled listeners.', array('exception' => $e)); + } + + // unable to retrieve the uncalled listeners + return array(); + } + + $notCalled = array(); + foreach ($allListeners as $eventName => $listeners) { + foreach ($listeners as $listener) { + $called = false; + if (isset($this->called[$eventName])) { + foreach ($this->called[$eventName] as $l) { + if ($l->getWrappedListener() === $listener) { + $called = true; + + break; + } + } + } + + if (!$called) { + $info = $this->getListenerInfo($listener, $eventName); + $notCalled[$eventName.'.'.$info['pretty']] = $info; + } + } + } + + uasort($notCalled, array($this, 'sortListenersByPriority')); + + return $notCalled; + } + + /** + * Proxies all method calls to the original event dispatcher. + * + * @param string $method The method name + * @param array $arguments The method arguments + * + * @return mixed + */ + public function __call($method, $arguments) + { + return \call_user_func_array(array($this->dispatcher, $method), $arguments); + } + + /** + * Called before dispatching the event. + * + * @param string $eventName The event name + * @param Event $event The event + */ + protected function preDispatch($eventName, Event $event) + { + } + + /** + * Called after dispatching the event. + * + * @param string $eventName The event name + * @param Event $event The event + */ + protected function postDispatch($eventName, Event $event) + { + } + + private function preProcess($eventName) + { + foreach ($this->dispatcher->getListeners($eventName) as $listener) { + $info = $this->getListenerInfo($listener, $eventName); + $name = isset($info['class']) ? $info['class'] : $info['type']; + $wrappedListener = new WrappedListener($listener, $name, $this->stopwatch, $this); + $this->wrappedListeners[$eventName][] = $wrappedListener; + $this->dispatcher->removeListener($eventName, $listener); + $this->dispatcher->addListener($eventName, $wrappedListener, $info['priority']); + } + } + + private function postProcess($eventName) + { + unset($this->wrappedListeners[$eventName]); + $skipped = false; + foreach ($this->dispatcher->getListeners($eventName) as $listener) { + if (!$listener instanceof WrappedListener) { // #12845: a new listener was added during dispatch. + continue; + } + // Unwrap listener + $priority = $this->getListenerPriority($eventName, $listener); + $this->dispatcher->removeListener($eventName, $listener); + $this->dispatcher->addListener($eventName, $listener->getWrappedListener(), $priority); + + $info = $this->getListenerInfo($listener->getWrappedListener(), $eventName); + if ($listener->wasCalled()) { + if (null !== $this->logger) { + $this->logger->debug(sprintf('Notified event "%s" to listener "%s".', $eventName, $info['pretty'])); + } + + if (!isset($this->called[$eventName])) { + $this->called[$eventName] = new \SplObjectStorage(); + } + + $this->called[$eventName]->attach($listener); + } + + if (null !== $this->logger && $skipped) { + $this->logger->debug(sprintf('Listener "%s" was not called for event "%s".', $info['pretty'], $eventName)); + } + + if ($listener->stoppedPropagation()) { + if (null !== $this->logger) { + $this->logger->debug(sprintf('Listener "%s" stopped propagation of the event "%s".', $info['pretty'], $eventName)); + } + + $skipped = true; + } + } + } + + /** + * Returns information about the listener. + * + * @param object $listener The listener + * @param string $eventName The event name + * + * @return array Information about the listener + */ + private function getListenerInfo($listener, $eventName) + { + $info = array( + 'event' => $eventName, + 'priority' => $this->getListenerPriority($eventName, $listener), + ); + + // unwrap for correct listener info + if ($listener instanceof WrappedListener) { + $listener = $listener->getWrappedListener(); + } + + if ($listener instanceof \Closure) { + $info += array( + 'type' => 'Closure', + 'pretty' => 'closure', + ); + } elseif (\is_string($listener)) { + try { + $r = new \ReflectionFunction($listener); + $file = $r->getFileName(); + $line = $r->getStartLine(); + } catch (\ReflectionException $e) { + $file = null; + $line = null; + } + $info += array( + 'type' => 'Function', + 'function' => $listener, + 'file' => $file, + 'line' => $line, + 'pretty' => $listener, + ); + } elseif (\is_array($listener) || (\is_object($listener) && \is_callable($listener))) { + if (!\is_array($listener)) { + $listener = array($listener, '__invoke'); + } + $class = \is_object($listener[0]) ? \get_class($listener[0]) : $listener[0]; + try { + $r = new \ReflectionMethod($class, $listener[1]); + $file = $r->getFileName(); + $line = $r->getStartLine(); + } catch (\ReflectionException $e) { + $file = null; + $line = null; + } + $info += array( + 'type' => 'Method', + 'class' => $class, + 'method' => $listener[1], + 'file' => $file, + 'line' => $line, + 'pretty' => $class.'::'.$listener[1], + ); + } + + return $info; + } + + private function sortListenersByPriority($a, $b) + { + if (\is_int($a['priority']) && !\is_int($b['priority'])) { + return 1; + } + + if (!\is_int($a['priority']) && \is_int($b['priority'])) { + return -1; + } + + if ($a['priority'] === $b['priority']) { + return 0; + } + + if ($a['priority'] > $b['priority']) { + return -1; + } + + return 1; + } +} |