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Editing: EarlyExpirationDispatcher.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\Cache\Messenger;

use Psr\Log\LoggerInterface;
use Symfony\Component\Cache\Adapter\AdapterInterface;
use Symfony\Component\Cache\CacheItem;
use Symfony\Component\DependencyInjection\ReverseContainer;
use Symfony\Component\Messenger\MessageBusInterface;
use Symfony\Component\Messenger\Stamp\HandledStamp;

/**
 * Sends the computation of cached values to a message bus.
 */
class EarlyExpirationDispatcher
{
    private $bus;
    private $reverseContainer;
    private $callbackWrapper;

public function __construct(MessageBusInterface $bus, ReverseContainer $reverseContainer, callable $callbackWrapper = null)
    {
        $this->bus = $bus;
        $this->reverseContainer = $reverseContainer;
        $this->callbackWrapper = $callbackWrapper;
    }

public function __invoke(callable $callback, CacheItem $item, bool &$save, AdapterInterface $pool, \Closure $setMetadata, LoggerInterface $logger = null)
    {
        if (!$item->isHit() || null === $message = EarlyExpirationMessage::create($this->reverseContainer, $callback, $item, $pool)) {
            // The item is stale or the callback cannot be reversed: we must compute the value now
            $logger && $logger->info('Computing item "{key}" online: '.($item->isHit() ? 'callback cannot be reversed' : 'item is stale'), ['key' => $item->getKey()]);

return null !== $this->callbackWrapper ? ($this->callbackWrapper)($callback, $item, $save, $pool, $setMetadata, $logger) : $callback($item, $save);
        }

$envelope = $this->bus->dispatch($message);

if ($logger) {
            if ($envelope->last(HandledStamp::class)) {
                $logger->info('Item "{key}" was computed online', ['key' => $item->getKey()]);
            } else {
                $logger->info('Item "{key}" sent for recomputation', ['key' => $item->getKey()]);
            }
        }

// The item's value is not stale, no need to write it to the backend
        $save = false;

return $message->getItem()->get() ?? $item->get();
    }
}

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