408 lines
13 KiB
PHP
408 lines
13 KiB
PHP
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<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\EventDispatcher\Debug;
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use Psr\EventDispatcher\StoppableEventInterface;
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use Psr\Log\LoggerInterface;
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use Symfony\Component\EventDispatcher\Event;
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use Symfony\Component\EventDispatcher\EventDispatcherInterface;
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use Symfony\Component\EventDispatcher\EventSubscriberInterface;
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use Symfony\Component\EventDispatcher\LegacyEventDispatcherProxy;
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use Symfony\Component\EventDispatcher\LegacyEventProxy;
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use Symfony\Component\HttpFoundation\Request;
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use Symfony\Component\HttpFoundation\RequestStack;
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use Symfony\Component\Stopwatch\Stopwatch;
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use Symfony\Contracts\EventDispatcher\Event as ContractsEvent;
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/**
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* Collects some data about event listeners.
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*
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* This event dispatcher delegates the dispatching to another one.
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*
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* @author Fabien Potencier <fabien@symfony.com>
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*/
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class TraceableEventDispatcher implements TraceableEventDispatcherInterface
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{
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protected $logger;
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protected $stopwatch;
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private $callStack;
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private $dispatcher;
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private $wrappedListeners;
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private $orphanedEvents;
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private $requestStack;
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private $currentRequestHash = '';
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public function __construct(EventDispatcherInterface $dispatcher, Stopwatch $stopwatch, LoggerInterface $logger = null, RequestStack $requestStack = null)
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{
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$this->dispatcher = LegacyEventDispatcherProxy::decorate($dispatcher);
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$this->stopwatch = $stopwatch;
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$this->logger = $logger;
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$this->wrappedListeners = [];
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$this->orphanedEvents = [];
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$this->requestStack = $requestStack;
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}
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/**
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* {@inheritdoc}
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*/
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public function addListener($eventName, $listener, $priority = 0)
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{
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$this->dispatcher->addListener($eventName, $listener, $priority);
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}
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/**
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* {@inheritdoc}
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*/
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public function addSubscriber(EventSubscriberInterface $subscriber)
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{
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$this->dispatcher->addSubscriber($subscriber);
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}
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/**
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* {@inheritdoc}
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*/
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public function removeListener($eventName, $listener)
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{
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if (isset($this->wrappedListeners[$eventName])) {
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foreach ($this->wrappedListeners[$eventName] as $index => $wrappedListener) {
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if ($wrappedListener->getWrappedListener() === $listener || ($listener instanceof \Closure && $wrappedListener->getWrappedListener() == $listener)) {
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$listener = $wrappedListener;
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unset($this->wrappedListeners[$eventName][$index]);
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break;
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}
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}
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}
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return $this->dispatcher->removeListener($eventName, $listener);
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}
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/**
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* {@inheritdoc}
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*/
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public function removeSubscriber(EventSubscriberInterface $subscriber)
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{
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return $this->dispatcher->removeSubscriber($subscriber);
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}
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/**
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* {@inheritdoc}
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*/
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public function getListeners($eventName = null)
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{
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return $this->dispatcher->getListeners($eventName);
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}
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/**
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* {@inheritdoc}
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*/
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public function getListenerPriority($eventName, $listener)
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{
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// we might have wrapped listeners for the event (if called while dispatching)
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// in that case get the priority by wrapper
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if (isset($this->wrappedListeners[$eventName])) {
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foreach ($this->wrappedListeners[$eventName] as $wrappedListener) {
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if ($wrappedListener->getWrappedListener() === $listener || ($listener instanceof \Closure && $wrappedListener->getWrappedListener() == $listener)) {
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return $this->dispatcher->getListenerPriority($eventName, $wrappedListener);
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}
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}
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}
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return $this->dispatcher->getListenerPriority($eventName, $listener);
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}
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/**
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* {@inheritdoc}
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*/
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public function hasListeners($eventName = null)
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{
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return $this->dispatcher->hasListeners($eventName);
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}
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/**
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* {@inheritdoc}
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*
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* @param string|null $eventName
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*/
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public function dispatch($event/* , string $eventName = null */)
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{
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if (null === $this->callStack) {
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$this->callStack = new \SplObjectStorage();
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}
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$currentRequestHash = $this->currentRequestHash = $this->requestStack && ($request = $this->requestStack->getCurrentRequest()) ? spl_object_hash($request) : '';
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$eventName = 1 < \func_num_args() ? func_get_arg(1) : null;
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if (\is_object($event)) {
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$eventName = $eventName ?? \get_class($event);
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} else {
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@trigger_error(sprintf('Calling the "%s::dispatch()" method with the event name as first argument is deprecated since Symfony 4.3, pass it second and provide the event object first instead.', EventDispatcherInterface::class), \E_USER_DEPRECATED);
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$swap = $event;
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$event = $eventName ?? new Event();
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$eventName = $swap;
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if (!$event instanceof Event) {
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throw new \TypeError(sprintf('Argument 1 passed to "%s::dispatch()" must be an instance of "%s", "%s" given.', EventDispatcherInterface::class, Event::class, \is_object($event) ? \get_class($event) : \gettype($event)));
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}
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}
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if (null !== $this->logger && ($event instanceof Event || $event instanceof ContractsEvent || $event instanceof StoppableEventInterface) && $event->isPropagationStopped()) {
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$this->logger->debug(sprintf('The "%s" event is already stopped. No listeners have been called.', $eventName));
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}
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$this->preProcess($eventName);
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try {
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$this->beforeDispatch($eventName, $event);
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try {
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$e = $this->stopwatch->start($eventName, 'section');
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try {
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$this->dispatcher->dispatch($event, $eventName);
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} finally {
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if ($e->isStarted()) {
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$e->stop();
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}
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}
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} finally {
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$this->afterDispatch($eventName, $event);
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}
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} finally {
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$this->currentRequestHash = $currentRequestHash;
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$this->postProcess($eventName);
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}
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return $event;
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}
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/**
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* {@inheritdoc}
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*
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* @param Request|null $request The request to get listeners for
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*/
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public function getCalledListeners(/* Request $request = null */)
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{
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if (null === $this->callStack) {
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return [];
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}
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$hash = 1 <= \func_num_args() && null !== ($request = func_get_arg(0)) ? spl_object_hash($request) : null;
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$called = [];
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foreach ($this->callStack as $listener) {
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[$eventName, $requestHash] = $this->callStack->getInfo();
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if (null === $hash || $hash === $requestHash) {
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$called[] = $listener->getInfo($eventName);
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}
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}
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return $called;
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}
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/**
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* {@inheritdoc}
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*
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* @param Request|null $request The request to get listeners for
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*/
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public function getNotCalledListeners(/* Request $request = null */)
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{
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try {
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$allListeners = $this->getListeners();
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} catch (\Exception $e) {
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if (null !== $this->logger) {
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$this->logger->info('An exception was thrown while getting the uncalled listeners.', ['exception' => $e]);
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}
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// unable to retrieve the uncalled listeners
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return [];
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}
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$hash = 1 <= \func_num_args() && null !== ($request = func_get_arg(0)) ? spl_object_hash($request) : null;
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$calledListeners = [];
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if (null !== $this->callStack) {
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foreach ($this->callStack as $calledListener) {
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[, $requestHash] = $this->callStack->getInfo();
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if (null === $hash || $hash === $requestHash) {
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$calledListeners[] = $calledListener->getWrappedListener();
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}
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}
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}
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$notCalled = [];
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foreach ($allListeners as $eventName => $listeners) {
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foreach ($listeners as $listener) {
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if (!\in_array($listener, $calledListeners, true)) {
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if (!$listener instanceof WrappedListener) {
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$listener = new WrappedListener($listener, null, $this->stopwatch, $this);
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}
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$notCalled[] = $listener->getInfo($eventName);
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}
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}
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}
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uasort($notCalled, [$this, 'sortNotCalledListeners']);
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return $notCalled;
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}
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/**
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* @param Request|null $request The request to get orphaned events for
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*/
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public function getOrphanedEvents(/* Request $request = null */): array
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{
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if (1 <= \func_num_args() && null !== $request = func_get_arg(0)) {
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return $this->orphanedEvents[spl_object_hash($request)] ?? [];
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}
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if (!$this->orphanedEvents) {
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return [];
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}
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return array_merge(...array_values($this->orphanedEvents));
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}
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public function reset()
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{
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$this->callStack = null;
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$this->orphanedEvents = [];
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$this->currentRequestHash = '';
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}
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/**
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* Proxies all method calls to the original event dispatcher.
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*
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* @param string $method The method name
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* @param array $arguments The method arguments
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*
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* @return mixed
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*/
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public function __call($method, $arguments)
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{
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return $this->dispatcher->{$method}(...$arguments);
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}
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/**
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* Called before dispatching the event.
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*
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* @param object $event
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*/
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protected function beforeDispatch(string $eventName, $event)
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{
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$this->preDispatch($eventName, $event instanceof Event ? $event : new LegacyEventProxy($event));
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}
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/**
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* Called after dispatching the event.
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*
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* @param object $event
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*/
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protected function afterDispatch(string $eventName, $event)
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{
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$this->postDispatch($eventName, $event instanceof Event ? $event : new LegacyEventProxy($event));
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}
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/**
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* @deprecated since Symfony 4.3, will be removed in 5.0, use beforeDispatch instead
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*/
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protected function preDispatch($eventName, Event $event)
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{
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}
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/**
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* @deprecated since Symfony 4.3, will be removed in 5.0, use afterDispatch instead
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*/
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protected function postDispatch($eventName, Event $event)
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{
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}
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private function preProcess(string $eventName)
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{
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if (!$this->dispatcher->hasListeners($eventName)) {
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$this->orphanedEvents[$this->currentRequestHash][] = $eventName;
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return;
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}
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foreach ($this->dispatcher->getListeners($eventName) as $listener) {
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$priority = $this->getListenerPriority($eventName, $listener);
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$wrappedListener = new WrappedListener($listener instanceof WrappedListener ? $listener->getWrappedListener() : $listener, null, $this->stopwatch, $this);
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$this->wrappedListeners[$eventName][] = $wrappedListener;
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$this->dispatcher->removeListener($eventName, $listener);
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$this->dispatcher->addListener($eventName, $wrappedListener, $priority);
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$this->callStack->attach($wrappedListener, [$eventName, $this->currentRequestHash]);
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}
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}
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private function postProcess(string $eventName)
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{
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unset($this->wrappedListeners[$eventName]);
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$skipped = false;
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foreach ($this->dispatcher->getListeners($eventName) as $listener) {
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if (!$listener instanceof WrappedListener) { // #12845: a new listener was added during dispatch.
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continue;
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}
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// Unwrap listener
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$priority = $this->getListenerPriority($eventName, $listener);
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$this->dispatcher->removeListener($eventName, $listener);
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$this->dispatcher->addListener($eventName, $listener->getWrappedListener(), $priority);
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if (null !== $this->logger) {
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$context = ['event' => $eventName, 'listener' => $listener->getPretty()];
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}
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if ($listener->wasCalled()) {
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if (null !== $this->logger) {
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$this->logger->debug('Notified event "{event}" to listener "{listener}".', $context);
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}
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} else {
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$this->callStack->detach($listener);
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}
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if (null !== $this->logger && $skipped) {
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$this->logger->debug('Listener "{listener}" was not called for event "{event}".', $context);
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}
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if ($listener->stoppedPropagation()) {
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if (null !== $this->logger) {
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$this->logger->debug('Listener "{listener}" stopped propagation of the event "{event}".', $context);
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}
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$skipped = true;
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}
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}
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}
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private function sortNotCalledListeners(array $a, array $b)
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||
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{
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if (0 !== $cmp = strcmp($a['event'], $b['event'])) {
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return $cmp;
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}
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||
|
|
|
||
|
|
if (\is_int($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;
|
||
|
|
}
|
||
|
|
}
|