352 lines
12 KiB
PHP
352 lines
12 KiB
PHP
|
<?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\EventDispatcher\StoppableEventInterface;
|
||
|
|
use Psr\Log\LoggerInterface;
|
||
|
|
use Symfony\Component\EventDispatcher\EventDispatcher;
|
||
|
|
use Symfony\Component\EventDispatcher\EventDispatcherInterface;
|
||
|
|
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
|
||
|
|
use Symfony\Component\HttpFoundation\Request;
|
||
|
|
use Symfony\Component\HttpFoundation\RequestStack;
|
||
|
|
use Symfony\Component\Stopwatch\Stopwatch;
|
||
|
|
use Symfony\Contracts\Service\ResetInterface;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Collects some data about event listeners.
|
||
|
|
*
|
||
|
|
* This event dispatcher delegates the dispatching to another one.
|
||
|
|
*
|
||
|
|
* @author Fabien Potencier <fabien@symfony.com>
|
||
|
|
*/
|
||
|
|
class TraceableEventDispatcher implements EventDispatcherInterface, ResetInterface
|
||
|
|
{
|
||
|
|
/**
|
||
|
|
* @var \SplObjectStorage<WrappedListener, array{string, string}>|null
|
||
|
|
*/
|
||
|
|
private ?\SplObjectStorage $callStack = null;
|
||
|
|
private array $wrappedListeners = [];
|
||
|
|
private array $orphanedEvents = [];
|
||
|
|
private string $currentRequestHash = '';
|
||
|
|
|
||
|
|
public function __construct(
|
||
|
|
private EventDispatcherInterface $dispatcher,
|
||
|
|
protected Stopwatch $stopwatch,
|
||
|
|
protected ?LoggerInterface $logger = null,
|
||
|
|
private ?RequestStack $requestStack = null,
|
||
|
|
) {
|
||
|
|
}
|
||
|
|
|
||
|
|
public function addListener(string $eventName, callable|array $listener, int $priority = 0): void
|
||
|
|
{
|
||
|
|
$this->dispatcher->addListener($eventName, $listener, $priority);
|
||
|
|
}
|
||
|
|
|
||
|
|
public function addSubscriber(EventSubscriberInterface $subscriber): void
|
||
|
|
{
|
||
|
|
$this->dispatcher->addSubscriber($subscriber);
|
||
|
|
}
|
||
|
|
|
||
|
|
public function removeListener(string $eventName, callable|array $listener): void
|
||
|
|
{
|
||
|
|
if (isset($this->wrappedListeners[$eventName])) {
|
||
|
|
foreach ($this->wrappedListeners[$eventName] as $index => $wrappedListener) {
|
||
|
|
if ($wrappedListener->getWrappedListener() === $listener || ($listener instanceof \Closure && $wrappedListener->getWrappedListener() == $listener)) {
|
||
|
|
$listener = $wrappedListener;
|
||
|
|
unset($this->wrappedListeners[$eventName][$index]);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
$this->dispatcher->removeListener($eventName, $listener);
|
||
|
|
}
|
||
|
|
|
||
|
|
public function removeSubscriber(EventSubscriberInterface $subscriber): void
|
||
|
|
{
|
||
|
|
$this->dispatcher->removeSubscriber($subscriber);
|
||
|
|
}
|
||
|
|
|
||
|
|
public function getListeners(?string $eventName = null): array
|
||
|
|
{
|
||
|
|
return $this->dispatcher->getListeners($eventName);
|
||
|
|
}
|
||
|
|
|
||
|
|
public function getListenerPriority(string $eventName, callable|array $listener): ?int
|
||
|
|
{
|
||
|
|
// we might have wrapped listeners for the event (if called while dispatching)
|
||
|
|
// in that case get the priority by wrapper
|
||
|
|
if (isset($this->wrappedListeners[$eventName])) {
|
||
|
|
foreach ($this->wrappedListeners[$eventName] as $wrappedListener) {
|
||
|
|
if ($wrappedListener->getWrappedListener() === $listener || ($listener instanceof \Closure && $wrappedListener->getWrappedListener() == $listener)) {
|
||
|
|
return $this->dispatcher->getListenerPriority($eventName, $wrappedListener);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return $this->dispatcher->getListenerPriority($eventName, $listener);
|
||
|
|
}
|
||
|
|
|
||
|
|
public function hasListeners(?string $eventName = null): bool
|
||
|
|
{
|
||
|
|
return $this->dispatcher->hasListeners($eventName);
|
||
|
|
}
|
||
|
|
|
||
|
|
public function dispatch(object $event, ?string $eventName = null): object
|
||
|
|
{
|
||
|
|
$eventName ??= $event::class;
|
||
|
|
|
||
|
|
$this->callStack ??= new \SplObjectStorage();
|
||
|
|
|
||
|
|
$currentRequestHash = $this->currentRequestHash = $this->requestStack && ($request = $this->requestStack->getCurrentRequest()) ? spl_object_hash($request) : '';
|
||
|
|
|
||
|
|
if (null !== $this->logger && $event instanceof StoppableEventInterface && $event->isPropagationStopped()) {
|
||
|
|
$this->logger->debug(sprintf('The "%s" event is already stopped. No listeners have been called.', $eventName));
|
||
|
|
}
|
||
|
|
|
||
|
|
$this->preProcess($eventName);
|
||
|
|
try {
|
||
|
|
$this->beforeDispatch($eventName, $event);
|
||
|
|
try {
|
||
|
|
$e = $this->stopwatch->start($eventName, 'section');
|
||
|
|
try {
|
||
|
|
$this->dispatcher->dispatch($event, $eventName);
|
||
|
|
} finally {
|
||
|
|
if ($e->isStarted()) {
|
||
|
|
$e->stop();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} finally {
|
||
|
|
$this->afterDispatch($eventName, $event);
|
||
|
|
}
|
||
|
|
} finally {
|
||
|
|
$this->currentRequestHash = $currentRequestHash;
|
||
|
|
$this->postProcess($eventName);
|
||
|
|
}
|
||
|
|
|
||
|
|
return $event;
|
||
|
|
}
|
||
|
|
|
||
|
|
public function getCalledListeners(?Request $request = null): array
|
||
|
|
{
|
||
|
|
if (null === $this->callStack) {
|
||
|
|
return [];
|
||
|
|
}
|
||
|
|
|
||
|
|
$hash = $request ? spl_object_hash($request) : null;
|
||
|
|
$called = [];
|
||
|
|
foreach ($this->callStack as $listener) {
|
||
|
|
[$eventName, $requestHash] = $this->callStack->getInfo();
|
||
|
|
if (null === $hash || $hash === $requestHash) {
|
||
|
|
$called[] = $listener->getInfo($eventName);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return $called;
|
||
|
|
}
|
||
|
|
|
||
|
|
public function getNotCalledListeners(?Request $request = null): array
|
||
|
|
{
|
||
|
|
try {
|
||
|
|
$allListeners = $this->dispatcher instanceof EventDispatcher ? $this->getListenersWithPriority() : $this->getListenersWithoutPriority();
|
||
|
|
} catch (\Exception $e) {
|
||
|
|
$this->logger?->info('An exception was thrown while getting the uncalled listeners.', ['exception' => $e]);
|
||
|
|
|
||
|
|
// unable to retrieve the uncalled listeners
|
||
|
|
return [];
|
||
|
|
}
|
||
|
|
|
||
|
|
$hash = $request ? spl_object_hash($request) : null;
|
||
|
|
$calledListeners = [];
|
||
|
|
|
||
|
|
if (null !== $this->callStack) {
|
||
|
|
foreach ($this->callStack as $calledListener) {
|
||
|
|
[, $requestHash] = $this->callStack->getInfo();
|
||
|
|
|
||
|
|
if (null === $hash || $hash === $requestHash) {
|
||
|
|
$calledListeners[] = $calledListener->getWrappedListener();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
$notCalled = [];
|
||
|
|
|
||
|
|
foreach ($allListeners as $eventName => $listeners) {
|
||
|
|
foreach ($listeners as [$listener, $priority]) {
|
||
|
|
if (!\in_array($listener, $calledListeners, true)) {
|
||
|
|
if (!$listener instanceof WrappedListener) {
|
||
|
|
$listener = new WrappedListener($listener, null, $this->stopwatch, $this, $priority);
|
||
|
|
}
|
||
|
|
$notCalled[] = $listener->getInfo($eventName);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
uasort($notCalled, $this->sortNotCalledListeners(...));
|
||
|
|
|
||
|
|
return $notCalled;
|
||
|
|
}
|
||
|
|
|
||
|
|
public function getOrphanedEvents(?Request $request = null): array
|
||
|
|
{
|
||
|
|
if ($request) {
|
||
|
|
return $this->orphanedEvents[spl_object_hash($request)] ?? [];
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!$this->orphanedEvents) {
|
||
|
|
return [];
|
||
|
|
}
|
||
|
|
|
||
|
|
return array_merge(...array_values($this->orphanedEvents));
|
||
|
|
}
|
||
|
|
|
||
|
|
public function reset(): void
|
||
|
|
{
|
||
|
|
$this->callStack = null;
|
||
|
|
$this->orphanedEvents = [];
|
||
|
|
$this->currentRequestHash = '';
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Proxies all method calls to the original event dispatcher.
|
||
|
|
*
|
||
|
|
* @param string $method The method name
|
||
|
|
* @param array $arguments The method arguments
|
||
|
|
*/
|
||
|
|
public function __call(string $method, array $arguments): mixed
|
||
|
|
{
|
||
|
|
return $this->dispatcher->{$method}(...$arguments);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Called before dispatching the event.
|
||
|
|
*/
|
||
|
|
protected function beforeDispatch(string $eventName, object $event): void
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Called after dispatching the event.
|
||
|
|
*/
|
||
|
|
protected function afterDispatch(string $eventName, object $event): void
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
private function preProcess(string $eventName): void
|
||
|
|
{
|
||
|
|
if (!$this->dispatcher->hasListeners($eventName)) {
|
||
|
|
$this->orphanedEvents[$this->currentRequestHash][] = $eventName;
|
||
|
|
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
foreach ($this->dispatcher->getListeners($eventName) as $listener) {
|
||
|
|
$priority = $this->getListenerPriority($eventName, $listener);
|
||
|
|
$wrappedListener = new WrappedListener($listener instanceof WrappedListener ? $listener->getWrappedListener() : $listener, null, $this->stopwatch, $this);
|
||
|
|
$this->wrappedListeners[$eventName][] = $wrappedListener;
|
||
|
|
$this->dispatcher->removeListener($eventName, $listener);
|
||
|
|
$this->dispatcher->addListener($eventName, $wrappedListener, $priority);
|
||
|
|
$this->callStack->attach($wrappedListener, [$eventName, $this->currentRequestHash]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
private function postProcess(string $eventName): void
|
||
|
|
{
|
||
|
|
unset($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);
|
||
|
|
|
||
|
|
if (null !== $this->logger) {
|
||
|
|
$context = ['event' => $eventName, 'listener' => $listener->getPretty()];
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($listener->wasCalled()) {
|
||
|
|
$this->logger?->debug('Notified event "{event}" to listener "{listener}".', $context);
|
||
|
|
} else {
|
||
|
|
$this->callStack->detach($listener);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (null !== $this->logger && $skipped) {
|
||
|
|
$this->logger->debug('Listener "{listener}" was not called for event "{event}".', $context);
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($listener->stoppedPropagation()) {
|
||
|
|
$this->logger?->debug('Listener "{listener}" stopped propagation of the event "{event}".', $context);
|
||
|
|
|
||
|
|
$skipped = true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
private function sortNotCalledListeners(array $a, array $b): int
|
||
|
|
{
|
||
|
|
if (0 !== $cmp = strcmp($a['event'], $b['event'])) {
|
||
|
|
return $cmp;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (\is_int($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;
|
||
|
|
}
|
||
|
|
|
||
|
|
private function getListenersWithPriority(): array
|
||
|
|
{
|
||
|
|
$result = [];
|
||
|
|
|
||
|
|
$allListeners = new \ReflectionProperty(EventDispatcher::class, 'listeners');
|
||
|
|
|
||
|
|
foreach ($allListeners->getValue($this->dispatcher) as $eventName => $listenersByPriority) {
|
||
|
|
foreach ($listenersByPriority as $priority => $listeners) {
|
||
|
|
foreach ($listeners as $listener) {
|
||
|
|
$result[$eventName][] = [$listener, $priority];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return $result;
|
||
|
|
}
|
||
|
|
|
||
|
|
private function getListenersWithoutPriority(): array
|
||
|
|
{
|
||
|
|
$result = [];
|
||
|
|
|
||
|
|
foreach ($this->getListeners() as $eventName => $listeners) {
|
||
|
|
foreach ($listeners as $listener) {
|
||
|
|
$result[$eventName][] = [$listener, null];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return $result;
|
||
|
|
}
|
||
|
|
}
|