Viewing file:  EarlyExpirationDispatcher.php (2.25 KB) -rw-r--r--
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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <[email protected]>
*
* 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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