EarlyExpirationHandler.php
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<?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 Symfony\Component\Cache\CacheItem;
use Symfony\Component\DependencyInjection\ReverseContainer;
use Symfony\Component\Messenger\Handler\MessageHandlerInterface;
/**
* Computes cached values sent to a message bus.
*/
class EarlyExpirationHandler implements MessageHandlerInterface
{
private $reverseContainer;
private $processedNonces = [];
public function __construct(ReverseContainer $reverseContainer)
{
$this->reverseContainer = $reverseContainer;
}
public function __invoke(EarlyExpirationMessage $message)
{
$item = $message->getItem();
$metadata = $item->getMetadata();
$expiry = $metadata[CacheItem::METADATA_EXPIRY] ?? 0;
$ctime = $metadata[CacheItem::METADATA_CTIME] ?? 0;
if ($expiry && $ctime) {
// skip duplicate or expired messages
$processingNonce = [$expiry, $ctime];
$pool = $message->getPool();
$key = $item->getKey();
if (($this->processedNonces[$pool][$key] ?? null) === $processingNonce) {
return;
}
if (microtime(true) >= $expiry) {
return;
}
$this->processedNonces[$pool] = [$key => $processingNonce] + ($this->processedNonces[$pool] ?? []);
if (\count($this->processedNonces[$pool]) > 100) {
array_pop($this->processedNonces[$pool]);
}
}
static $setMetadata;
$setMetadata ?? $setMetadata = \Closure::bind(
function (CacheItem $item, float $startTime) {
if ($item->expiry > $endTime = microtime(true)) {
$item->newMetadata[CacheItem::METADATA_EXPIRY] = $item->expiry;
$item->newMetadata[CacheItem::METADATA_CTIME] = (int) ceil(1000 * ($endTime - $startTime));
}
},
null,
CacheItem::class
);
$startTime = microtime(true);
$pool = $message->findPool($this->reverseContainer);
$callback = $message->findCallback($this->reverseContainer);
$value = $callback($item);
$setMetadata($item, $startTime);
$pool->save($item->set($value));
}
}