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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\ObjectCache; /** * Wrap any BagOStuff and add an in-process memory cache to it. * * The differences between CachedBagOStuff and MultiWriteBagOStuff are: * - CachedBagOStuff supports only one "backend". * - There's a flag for writes to only go to the in-memory cache. * - The in-memory cache is always updated. * - Locks go to the backend cache (with MultiWriteBagOStuff, it would wind * up going to the HashBagOStuff used for the in-memory cache). * * @newable * @ingroup Cache */ class CachedBagOStuff extends BagOStuff { /** @var BagOStuff */ protected $store; /** @var HashBagOStuff */ protected $procCache; /** * @stable to call * * @param BagOStuff $backend Permanent backend to use * @param array $params Parameters for HashBagOStuff */ public function __construct( BagOStuff $backend, $params = [] ) { $params['keyspace'] = $backend->keyspace; parent::__construct( $params ); $this->store = $backend; $this->procCache = new HashBagOStuff( $params ); $this->attrMap = $backend->attrMap; } public function get( $key, $flags = 0 ) { $value = $this->procCache->get( $key, $flags ); if ( $value !== false || $this->procCache->hasKey( $key ) ) { return $value; } $value = $this->store->proxyCall( __FUNCTION__, self::ARG0_KEY, self::RES_NONKEY, func_get_args(), $this ); $this->set( $key, $value, self::TTL_INDEFINITE, self::WRITE_CACHE_ONLY ); return $value; } public function getMulti( array $keys, $flags = 0 ) { $valueByKeyCached = []; $keysFetch = []; foreach ( $keys as $key ) { $value = $this->procCache->get( $key, $flags ); if ( $value === false && !$this->procCache->hasKey( $key ) ) { $keysFetch[] = $key; } else { $valueByKeyCached[$key] = $value; } } $valueByKeyFetched = $this->store->proxyCall( __FUNCTION__, self::ARG0_KEYARR, self::RES_KEYMAP, [ $keysFetch, $flags ], $this ); $this->setMulti( $valueByKeyFetched, self::TTL_INDEFINITE, self::WRITE_CACHE_ONLY ); return $valueByKeyCached + $valueByKeyFetched; } public function set( $key, $value, $exptime = 0, $flags = 0 ) { $this->procCache->set( $key, $value, $exptime, $flags ); if ( $this->fieldHasFlags( $flags, self::WRITE_CACHE_ONLY ) ) { return true; } return $this->store->proxyCall( __FUNCTION__, self::ARG0_KEY, self::RES_NONKEY, func_get_args(), $this ); } public function delete( $key, $flags = 0 ) { $this->procCache->delete( $key, $flags ); if ( $this->fieldHasFlags( $flags, self::WRITE_CACHE_ONLY ) ) { return true; } return $this->store->proxyCall( __FUNCTION__, self::ARG0_KEY, self::RES_NONKEY, func_get_args(), $this ); } public function add( $key, $value, $exptime = 0, $flags = 0 ) { if ( $this->get( $key ) === false ) { return $this->set( $key, $value, $exptime, $flags ); } // key already set return false; } // These just call the backend (tested elsewhere) // @codeCoverageIgnoreStart public function merge( $key, callable $callback, $exptime = 0, $attempts = 10, $flags = 0 ) { $this->procCache->delete( $key ); return $this->store->proxyCall( __FUNCTION__, self::ARG0_KEY, self::RES_NONKEY, func_get_args(), $this ); } public function changeTTL( $key, $exptime = 0, $flags = 0 ) { $this->procCache->delete( $key ); return $this->store->proxyCall( __FUNCTION__, self::ARG0_KEY, self::RES_NONKEY, func_get_args(), $this ); } public function lock( $key, $timeout = 6, $exptime = 6, $rclass = '' ) { return $this->store->proxyCall( __FUNCTION__, self::ARG0_KEY, self::RES_NONKEY, func_get_args(), $this ); } public function unlock( $key ) { return $this->store->proxyCall( __FUNCTION__, self::ARG0_KEY, self::RES_NONKEY, func_get_args(), $this ); } public function deleteObjectsExpiringBefore( $timestamp, ?callable $progress = null, $limit = INF, ?string $tag = null ) { $this->procCache->deleteObjectsExpiringBefore( $timestamp, $progress, $limit, $tag ); return $this->store->proxyCall( __FUNCTION__, self::ARG0_NONKEY, self::RES_NONKEY, func_get_args(), $this ); } public function setMulti( array $valueByKey, $exptime = 0, $flags = 0 ) { $this->procCache->setMulti( $valueByKey, $exptime, $flags ); if ( $this->fieldHasFlags( $flags, self::WRITE_CACHE_ONLY ) ) { return true; } return $this->store->proxyCall( __FUNCTION__, self::ARG0_KEYMAP, self::RES_NONKEY, func_get_args(), $this ); } public function deleteMulti( array $keys, $flags = 0 ) { $this->procCache->deleteMulti( $keys, $flags ); if ( $this->fieldHasFlags( $flags, self::WRITE_CACHE_ONLY ) ) { return true; } return $this->store->proxyCall( __FUNCTION__, self::ARG0_KEYARR, self::RES_NONKEY, func_get_args(), $this ); } public function changeTTLMulti( array $keys, $exptime, $flags = 0 ) { $this->procCache->changeTTLMulti( $keys, $exptime, $flags ); if ( $this->fieldHasFlags( $flags, self::WRITE_CACHE_ONLY ) ) { return true; } return $this->store->proxyCall( __FUNCTION__, self::ARG0_KEYARR, self::RES_NONKEY, func_get_args(), $this ); } public function incrWithInit( $key, $exptime, $step = 1, $init = null, $flags = 0 ) { $this->procCache->delete( $key ); return $this->store->proxyCall( __FUNCTION__, self::ARG0_KEY, self::RES_NONKEY, func_get_args(), $this ); } public function setMockTime( &$time ) { parent::setMockTime( $time ); $this->procCache->setMockTime( $time ); $this->store->setMockTime( $time ); } // @codeCoverageIgnoreEnd } /** @deprecated class alias since 1.43 */ class_alias( CachedBagOStuff::class, 'CachedBagOStuff' );
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