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<?php
namespace SMW\SQLStore\QueryDependency;
use Onoi\Cache\Cache;
use Psr\Log\LoggerAwareTrait;
use SMW\DIWikiPage;
use SMW\MediaWiki\Deferred\CallableUpdate;
use Title;
/**
* Temporary storage of entities that are expected to be refreshed (or updated)
* during an article view due to being a dependency of an altered query.
*
* @license GNU GPL v2+
* @since 3.0
*
* @author mwjames
*/
class DependencyLinksUpdateJournal {
use LoggerAwareTrait;
/**
* @var string
*/
const VERSION = '0.1';
/**
* Namespace for the cache instance
*/
const CACHE_NAMESPACE = 'smw:update:qdep';
/**
* @var Cache
*/
private $cache;
/**
* @var CallableUpdate
*/
private $callableUpdate;
/**
* @since 3.0
*
* @param Cache $cache
* @param callableUpdate $callableUpdate
*/
public function __construct( Cache $cache, CallableUpdate $callableUpdate ) {
$this->cache = $cache;
$this->callableUpdate = $callableUpdate;
}
/**
* @since 3.0
*
* @param DIWikiPage $subject
*
* @return string
*/
public static function makeKey( $subject ) {
$segments = [];
if ( $subject instanceof DIWikiPage || $subject instanceof Title ) {
$segments = [ $subject->getDBKey(), $subject->getNamespace(), $subject->getInterwiki(), '' ];
}
return smwfCacheKey(
self::CACHE_NAMESPACE,
[
implode( '#', $segments ),
self::VERSION
]
);
}
/**
* @since 3.0
*
* @param array $hashList
* @param integer|true $revID
*/
public function updateFromList( array $hashList, $revID = true ) {
foreach ( $hashList as $hash ) {
$key = smwfCacheKey(
self::CACHE_NAMESPACE,
[
$hash,
self::VERSION
]
);
$this->cache->save( $key, $revID );
}
}
/**
* @since 3.0
*
* @param DIWikiPage|Title $subject
* @param integer|true $revID
*/
public function update( $subject, $revID = true ) {
$this->cache->save( self::makeKey( $subject ), $revID );
}
/**
* @since 3.0
*
* @param DIWikiPage|Title $subject
*/
public function has( $subject ) {
return $this->cache->contains( self::makeKey( $subject ) ) === true;
}
/**
* @since 3.0
*
* @param DIWikiPage $subject
*/
public function delete( $subject ) {
if ( !$subject instanceof Title && !$subject instanceof DIWikiPage ) {
throw new RuntimeException( "Invalid subject instance" );
}
// Avoid interference with any other process during a preOutputCommit
// stage especially when CACHE_DB is used as instance
$this->callableUpdate->setCallback( function() use( $subject ) {
$this->cache->delete( self::makeKey( $subject ) );
} );
$this->callableUpdate->setOrigin(
[
__METHOD__,
$subject->getDBKey() . '#' . $subject->getNamespace() . '#' . $subject->getInterwiki()
]
);
$this->callableUpdate->pushUpdate();
}
}
|
