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CachedMessageGroupFactoryLoader.php
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CachedMessageGroupFactoryLoader.php
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<?php
declare( strict_types = 1 );
namespace MediaWiki\Extension\Translate\MessageGroupProcessing;
use CachedMessageGroupLoader;
use DependencyWrapper;
use MessageGroup;
use MessageGroupLoader;
use WANObjectCache;
use Wikimedia\LightweightObjectStore\ExpirationAwareness;
use Wikimedia\Rdbms\Database;
use Wikimedia\Rdbms\IConnectionProvider;
/**
* Loads and manages message group factory loaders
* @since 2024.05
* @license GPL-2.0-or-later
* @author Niklas Laxström
*/
class CachedMessageGroupFactoryLoader implements CachedMessageGroupLoader, MessageGroupLoader {
private WANObjectCache $cache;
private IConnectionProvider $dbProvider;
private string $cacheKey;
private CachedMessageGroupFactory $factory;
private const CACHE_TTL = ExpirationAwareness::TTL_DAY;
public function __construct(
WANObjectCache $cache,
IConnectionProvider $dbProvider,
CachedMessageGroupFactory $factory
) {
$this->cache = $cache;
$this->cacheKey = $cache->makeKey( 'translate-mg', $factory->getCacheKey() );
$this->factory = $factory;
$this->dbProvider = $dbProvider;
}
/** @return MessageGroup[] */
public function getGroups(): array {
return $this->factory->createGroups( $this->getCachedValue()->getValue() );
}
/** @return MessageGroup[] */
public function recache(): array {
$this->cache->touchCheckKey( $this->cacheKey );
return $this->factory->createGroups(
$this->factory->getData( $this->dbProvider->getPrimaryDatabase() )
);
}
public function clearCache(): void {
$this->cache->delete( $this->cacheKey );
}
private function getCachedValue(): DependencyWrapper {
return $this->cache->getWithSetCallback(
$this->cacheKey,
self::CACHE_TTL,
fn ( $oldValue, &$ttl, array &$setOpts ) => $this->getCacheData( $setOpts ),
[
// avoid stampedes (mutex)
'lockTSE' => 30,
'checkKeys' => [ $this->cacheKey ],
'touchedCallback' => static fn ( DependencyWrapper $value ) => $value->isExpired() ? time() : null,
'version' => $this->factory->getCacheVersion(),
]
);
}
private function getCacheData( array &$setOpts ): DependencyWrapper {
$dbr = $this->dbProvider->getReplicaDatabase();
// Some factories may not use the database, in which case this is superflous.
// Having it here for simplicity.
$setOpts += Database::getCacheSetOptions( $dbr );
$wrapper = new DependencyWrapper(
$this->factory->getData( $dbr ),
$this->factory->getDependencies()
);
$wrapper->initialiseDeps();
return $wrapper;
}
}

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text/x-php
Expires
Sat, Oct 3, 20:56 (5 d, 3 h ago)
Storage Engine
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Storage Handle
3d/36/ab5da0477c3bde4c20c90e34ab1d
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CachedMessageGroupFactoryLoader.php (2 KB)

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