62 lines
2.2 KiB
PHP
62 lines
2.2 KiB
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();
|
|
}
|
|
}
|