Initial commit: Grav CMS setup with HTML reference material
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
+268
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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\Messenger;
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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\LegacyEventDispatcherProxy;
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use Symfony\Component\Messenger\Event\WorkerMessageFailedEvent;
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use Symfony\Component\Messenger\Event\WorkerMessageHandledEvent;
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use Symfony\Component\Messenger\Event\WorkerMessageReceivedEvent;
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use Symfony\Component\Messenger\Event\WorkerRunningEvent;
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use Symfony\Component\Messenger\Event\WorkerStartedEvent;
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use Symfony\Component\Messenger\Event\WorkerStoppedEvent;
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use Symfony\Component\Messenger\Exception\HandlerFailedException;
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use Symfony\Component\Messenger\Exception\RejectRedeliveredMessageException;
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use Symfony\Component\Messenger\Exception\RuntimeException;
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use Symfony\Component\Messenger\Stamp\AckStamp;
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use Symfony\Component\Messenger\Stamp\ConsumedByWorkerStamp;
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use Symfony\Component\Messenger\Stamp\FlushBatchHandlersStamp;
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use Symfony\Component\Messenger\Stamp\NoAutoAckStamp;
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use Symfony\Component\Messenger\Stamp\ReceivedStamp;
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use Symfony\Component\Messenger\Transport\Receiver\QueueReceiverInterface;
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use Symfony\Component\Messenger\Transport\Receiver\ReceiverInterface;
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use Symfony\Contracts\EventDispatcher\EventDispatcherInterface;
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/**
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* @author Samuel Roze <samuel.roze@gmail.com>
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* @author Tobias Schultze <http://tobion.de>
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*
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* @final
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*/
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class Worker
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{
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private $receivers;
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private $bus;
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private $eventDispatcher;
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private $logger;
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private $shouldStop = false;
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private $metadata;
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private $acks = [];
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private $unacks;
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/**
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* @param ReceiverInterface[] $receivers Where the key is the transport name
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*/
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public function __construct(array $receivers, MessageBusInterface $bus, ?EventDispatcherInterface $eventDispatcher = null, ?LoggerInterface $logger = null)
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{
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$this->receivers = $receivers;
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$this->bus = $bus;
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$this->logger = $logger;
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$this->eventDispatcher = class_exists(Event::class) ? LegacyEventDispatcherProxy::decorate($eventDispatcher) : $eventDispatcher;
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$this->metadata = new WorkerMetadata([
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'transportNames' => array_keys($receivers),
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]);
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$this->unacks = new \SplObjectStorage();
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}
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/**
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* Receive the messages and dispatch them to the bus.
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*
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* Valid options are:
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* * sleep (default: 1000000): Time in microseconds to sleep after no messages are found
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* * queues: The queue names to consume from, instead of consuming from all queues. When this is used, all receivers must implement the QueueReceiverInterface
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*/
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public function run(array $options = []): void
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{
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$options = array_merge([
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'sleep' => 1000000,
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], $options);
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$queueNames = $options['queues'] ?? null;
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$this->metadata->set(['queueNames' => $queueNames]);
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$this->dispatchEvent(new WorkerStartedEvent($this));
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if ($queueNames) {
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// if queue names are specified, all receivers must implement the QueueReceiverInterface
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foreach ($this->receivers as $transportName => $receiver) {
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if (!$receiver instanceof QueueReceiverInterface) {
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throw new RuntimeException(sprintf('Receiver for "%s" does not implement "%s".', $transportName, QueueReceiverInterface::class));
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}
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}
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}
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while (!$this->shouldStop) {
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$envelopeHandled = false;
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$envelopeHandledStart = microtime(true);
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foreach ($this->receivers as $transportName => $receiver) {
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if ($queueNames) {
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$envelopes = $receiver->getFromQueues($queueNames);
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} else {
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$envelopes = $receiver->get();
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}
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foreach ($envelopes as $envelope) {
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$envelopeHandled = true;
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$this->handleMessage($envelope, $transportName);
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$this->dispatchEvent(new WorkerRunningEvent($this, false));
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if ($this->shouldStop) {
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break 2;
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}
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}
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// after handling a single receiver, quit and start the loop again
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// this should prevent multiple lower priority receivers from
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// blocking too long before the higher priority are checked
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if ($envelopeHandled) {
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break;
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}
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}
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if (!$envelopeHandled && $this->flush(false)) {
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continue;
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}
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if (!$envelopeHandled) {
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$this->dispatchEvent(new WorkerRunningEvent($this, true));
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if (0 < $sleep = (int) ($options['sleep'] - 1e6 * (microtime(true) - $envelopeHandledStart))) {
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usleep($sleep);
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}
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}
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}
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$this->flush(true);
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$this->dispatchEvent(new WorkerStoppedEvent($this));
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}
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private function handleMessage(Envelope $envelope, string $transportName): void
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{
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$event = new WorkerMessageReceivedEvent($envelope, $transportName);
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$this->dispatchEvent($event);
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$envelope = $event->getEnvelope();
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if (!$event->shouldHandle()) {
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return;
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}
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$acked = false;
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$ack = function (Envelope $envelope, ?\Throwable $e = null) use ($transportName, &$acked) {
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$acked = true;
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$this->acks[] = [$transportName, $envelope, $e];
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};
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try {
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$e = null;
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$envelope = $this->bus->dispatch($envelope->with(new ReceivedStamp($transportName), new ConsumedByWorkerStamp(), new AckStamp($ack)));
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} catch (\Throwable $e) {
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}
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$noAutoAckStamp = $envelope->last(NoAutoAckStamp::class);
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if (!$acked && !$noAutoAckStamp) {
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$this->acks[] = [$transportName, $envelope, $e];
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} elseif ($noAutoAckStamp) {
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$this->unacks[$noAutoAckStamp->getHandlerDescriptor()->getBatchHandler()] = [$envelope->withoutAll(AckStamp::class), $transportName];
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}
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$this->ack();
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}
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private function ack(): bool
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{
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$acks = $this->acks;
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$this->acks = [];
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foreach ($acks as [$transportName, $envelope, $e]) {
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$receiver = $this->receivers[$transportName];
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if (null !== $e) {
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if ($rejectFirst = $e instanceof RejectRedeliveredMessageException) {
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// redelivered messages are rejected first so that continuous failures in an event listener or while
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// publishing for retry does not cause infinite redelivery loops
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$receiver->reject($envelope);
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}
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if ($e instanceof HandlerFailedException) {
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$envelope = $e->getEnvelope();
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}
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$failedEvent = new WorkerMessageFailedEvent($envelope, $transportName, $e);
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$this->dispatchEvent($failedEvent);
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$envelope = $failedEvent->getEnvelope();
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if (!$rejectFirst) {
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$receiver->reject($envelope);
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}
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continue;
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}
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$handledEvent = new WorkerMessageHandledEvent($envelope, $transportName);
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$this->dispatchEvent($handledEvent);
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$envelope = $handledEvent->getEnvelope();
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if (null !== $this->logger) {
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$message = $envelope->getMessage();
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$context = [
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'class' => \get_class($message),
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];
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$this->logger->info('{class} was handled successfully (acknowledging to transport).', $context);
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}
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$receiver->ack($envelope);
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}
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return (bool) $acks;
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}
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private function flush(bool $force): bool
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{
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$unacks = $this->unacks;
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if (!$unacks->count()) {
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return false;
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}
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$this->unacks = new \SplObjectStorage();
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foreach ($unacks as $batchHandler) {
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[$envelope, $transportName] = $unacks[$batchHandler];
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try {
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$this->bus->dispatch($envelope->with(new FlushBatchHandlersStamp($force)));
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$envelope = $envelope->withoutAll(NoAutoAckStamp::class);
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unset($unacks[$batchHandler], $batchHandler);
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} catch (\Throwable $e) {
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$this->acks[] = [$transportName, $envelope, $e];
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}
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}
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return $this->ack();
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}
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public function stop(): void
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{
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if (null !== $this->logger) {
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$this->logger->info('Stopping worker.', ['transport_names' => $this->metadata->getTransportNames()]);
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}
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$this->shouldStop = true;
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}
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public function getMetadata(): WorkerMetadata
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{
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return $this->metadata;
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}
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private function dispatchEvent(object $event): void
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{
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if (null === $this->eventDispatcher) {
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return;
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}
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$this->eventDispatcher->dispatch($event);
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}
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}
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