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62 lines
2.2 KiB
62 lines
2.2 KiB
2 years ago
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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\Cache\Messenger;
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use Psr\Log\LoggerInterface;
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use Symfony\Component\Cache\Adapter\AdapterInterface;
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use Symfony\Component\Cache\CacheItem;
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use Symfony\Component\DependencyInjection\ReverseContainer;
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use Symfony\Component\Messenger\MessageBusInterface;
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use Symfony\Component\Messenger\Stamp\HandledStamp;
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/**
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* Sends the computation of cached values to a message bus.
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*/
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class EarlyExpirationDispatcher
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{
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private $bus;
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private $reverseContainer;
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private $callbackWrapper;
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public function __construct(MessageBusInterface $bus, ReverseContainer $reverseContainer, callable $callbackWrapper = null)
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{
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$this->bus = $bus;
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$this->reverseContainer = $reverseContainer;
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$this->callbackWrapper = $callbackWrapper;
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}
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public function __invoke(callable $callback, CacheItem $item, bool &$save, AdapterInterface $pool, \Closure $setMetadata, LoggerInterface $logger = null)
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{
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if (!$item->isHit() || null === $message = EarlyExpirationMessage::create($this->reverseContainer, $callback, $item, $pool)) {
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// The item is stale or the callback cannot be reversed: we must compute the value now
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$logger && $logger->info('Computing item "{key}" online: '.($item->isHit() ? 'callback cannot be reversed' : 'item is stale'), ['key' => $item->getKey()]);
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return null !== $this->callbackWrapper ? ($this->callbackWrapper)($callback, $item, $save, $pool, $setMetadata, $logger) : $callback($item, $save);
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}
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$envelope = $this->bus->dispatch($message);
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if ($logger) {
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if ($envelope->last(HandledStamp::class)) {
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$logger->info('Item "{key}" was computed online', ['key' => $item->getKey()]);
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} else {
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$logger->info('Item "{key}" sent for recomputation', ['key' => $item->getKey()]);
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}
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}
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// The item's value is not stale, no need to write it to the backend
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$save = false;
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return $message->getItem()->get() ?? $item->get();
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}
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}
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