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| 1 | <?php |
| 2 | /** |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License as published by |
| 5 | * the Free Software Foundation; either version 2 of the License, or |
| 6 | * (at your option) any later version. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License along |
| 14 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 15 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 16 | * http://www.gnu.org/copyleft/gpl.html |
| 17 | * |
| 18 | * @file |
| 19 | */ |
| 20 | |
| 21 | /** |
| 22 | * LocalisationCache optimised for loading many languages at once. |
| 23 | * |
| 24 | * Used by maintenance/rebuildLocalisationCache.php. |
| 25 | * |
| 26 | * @ingroup Language |
| 27 | */ |
| 28 | class LocalisationCacheBulkLoad extends LocalisationCache { |
| 29 | |
| 30 | /** |
| 31 | * A cache for the contents of the data files. |
| 32 | * Core files are serialized to avoid using ~1GB of RAM during a re-cache. |
| 33 | */ |
| 34 | private $fileCache = []; |
| 35 | |
| 36 | /** |
| 37 | * Most recently used languages. Uses the linked-list aspect of PHP hashtables |
| 38 | * to keep the most recently used language codes at the end of the array, and |
| 39 | * the language codes that are ready to be deleted at the beginning. |
| 40 | */ |
| 41 | private $mruLangs = []; |
| 42 | |
| 43 | /** |
| 44 | * Maximum number of languages that may be loaded into $this->data |
| 45 | */ |
| 46 | private $maxLoadedLangs = 10; |
| 47 | |
| 48 | /** |
| 49 | * @param string $fileName |
| 50 | * @param string $fileType |
| 51 | * @return array|mixed |
| 52 | */ |
| 53 | protected function readPHPFile( $fileName, $fileType ) { |
| 54 | $serialize = $fileType === 'core'; |
| 55 | if ( !isset( $this->fileCache[$fileName][$fileType] ) ) { |
| 56 | $data = parent::readPHPFile( $fileName, $fileType ); |
| 57 | |
| 58 | if ( $serialize ) { |
| 59 | $encData = serialize( $data ); |
| 60 | } else { |
| 61 | $encData = $data; |
| 62 | } |
| 63 | |
| 64 | $this->fileCache[$fileName][$fileType] = $encData; |
| 65 | |
| 66 | return $data; |
| 67 | } elseif ( $serialize ) { |
| 68 | return unserialize( $this->fileCache[$fileName][$fileType] ); |
| 69 | } else { |
| 70 | return $this->fileCache[$fileName][$fileType]; |
| 71 | } |
| 72 | } |
| 73 | |
| 74 | /** |
| 75 | * @param string $code |
| 76 | * @param string $key |
| 77 | * @return mixed |
| 78 | */ |
| 79 | public function getItem( $code, $key ) { |
| 80 | unset( $this->mruLangs[$code] ); |
| 81 | $this->mruLangs[$code] = true; |
| 82 | |
| 83 | return parent::getItem( $code, $key ); |
| 84 | } |
| 85 | |
| 86 | /** |
| 87 | * @param string $code |
| 88 | * @param string $key |
| 89 | * @param string $subkey |
| 90 | * @return mixed |
| 91 | */ |
| 92 | public function getSubitem( $code, $key, $subkey ) { |
| 93 | unset( $this->mruLangs[$code] ); |
| 94 | $this->mruLangs[$code] = true; |
| 95 | |
| 96 | return parent::getSubitem( $code, $key, $subkey ); |
| 97 | } |
| 98 | |
| 99 | /** |
| 100 | * @param string $code |
| 101 | */ |
| 102 | public function recache( $code ) { |
| 103 | parent::recache( $code ); |
| 104 | unset( $this->mruLangs[$code] ); |
| 105 | $this->mruLangs[$code] = true; |
| 106 | $this->trimCache(); |
| 107 | } |
| 108 | |
| 109 | /** |
| 110 | * @param string $code |
| 111 | */ |
| 112 | public function unload( $code ) { |
| 113 | unset( $this->mruLangs[$code] ); |
| 114 | parent::unload( $code ); |
| 115 | } |
| 116 | |
| 117 | /** |
| 118 | * Unload cached languages until there are less than $this->maxLoadedLangs |
| 119 | */ |
| 120 | protected function trimCache() { |
| 121 | while ( count( $this->data ) > $this->maxLoadedLangs && count( $this->mruLangs ) ) { |
| 122 | $code = array_key_first( $this->mruLangs ); |
| 123 | wfDebug( __METHOD__ . ": unloading $code" ); |
| 124 | $this->unload( $code ); |
| 125 | } |
| 126 | } |
| 127 | |
| 128 | } |