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DependencyStore.php
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DependencyStore.php
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<?php
/**
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
*/
namespace Wikimedia\DependencyStore;
/**
* Track per-module dependency file paths that are expensive to mass compute
*
* @internal For use by ResourceLoader\Module only
*/
abstract class DependencyStore {
protected const KEY_PATHS = 'paths';
protected const KEY_AS_OF = 'asOf';
/**
* @param string[] $paths List of dependency paths
* @param int|null $asOf UNIX timestamp or null
* @return array
*/
public function newEntityDependencies( array $paths = [], $asOf = null ) {
return [ self::KEY_PATHS => $paths, self::KEY_AS_OF => $asOf ];
}
/**
* Get the currently tracked dependencies for an entity
*
* The "paths" field contains a sorted list of unique paths
*
* The "asOf" field reflects the last-modified timestamp of the dependency data itself.
* It will be null if there is no tracking data available. Note that if empty path lists
* are never stored (as an optimisation) then it will not be possible to discern whether
* the result is up-to-date.
*
* @param string $type Entity type
* @param string $entity Entity name
* @return array Map of (paths: paths, asOf: UNIX timestamp or null)
*/
final public function retrieve( $type, $entity ) {
return $this->retrieveMulti( $type, [ $entity ] )[$entity];
}
/**
* Get the currently tracked dependencies for a set of entities
*
* @see KeyValueDependencyStore::retrieve()
* @param string $type Entity type
* @param string[] $entities Entity names
* @return array[] Map of (entity => (paths: paths, asOf: UNIX timestamp or null))
*/
abstract public function retrieveMulti( $type, array $entities );
/**
* Set the currently tracked dependencies for an entity
*
* @param string $type Entity type
* @param string $entity Entity name
* @param array $data Map of (paths: paths, asOf: UNIX timestamp or null)
* @param int $ttl New time-to-live in seconds
*/
final public function store( $type, $entity, array $data, $ttl ) {
$this->storeMulti( $type, [ $entity => $data ], $ttl );
}
/**
* Set the currently tracked dependencies for a set of entities
*
* @see KeyValueDependencyStore::store()
* @param string $type Entity type
* @param array[] $dataByEntity Map of (entity => (paths: paths, asOf: UNIX timestamp or null))
* @param int $ttl New time-to-live in seconds
*
*/
abstract public function storeMulti( $type, array $dataByEntity, $ttl );
/**
* Delete the currently tracked dependencies for an entity or set of entities
*
* @param string $type Entity type
* @param string|string[] $entities Entity name(s)
*/
abstract public function remove( $type, $entities );
}

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