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| 1 | <?php |
| 2 | |
| 3 | namespace CirrusSearch; |
| 4 | |
| 5 | use Elastica\Multi\ResultSet; |
| 6 | use Elastica\Multi\Search as MultiSearch; |
| 7 | use MediaWiki\Logger\LoggerFactory; |
| 8 | use Title; |
| 9 | |
| 10 | /** |
| 11 | * Tracks whether a Title is known on other indexes. |
| 12 | * |
| 13 | * This program is free software; you can redistribute it and/or modify |
| 14 | * it under the terms of the GNU General Public License as published by |
| 15 | * the Free Software Foundation; either version 2 of the License, or |
| 16 | * (at your option) any later version. |
| 17 | * |
| 18 | * This program is distributed in the hope that it will be useful, |
| 19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 21 | * GNU General Public License for more details. |
| 22 | * |
| 23 | * You should have received a copy of the GNU General Public License along |
| 24 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 25 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 26 | * http://www.gnu.org/copyleft/gpl.html |
| 27 | */ |
| 28 | class OtherIndexesUpdater extends Updater { |
| 29 | /** @var string Local site we're tracking */ |
| 30 | private $localSite; |
| 31 | |
| 32 | /** |
| 33 | * @param Connection $readConnection |
| 34 | * @param string|null $writeToClusterName |
| 35 | * @param string $localSite |
| 36 | */ |
| 37 | public function __construct( Connection $readConnection, $writeToClusterName, $localSite ) { |
| 38 | parent::__construct( $readConnection, $writeToClusterName ); |
| 39 | $this->localSite = $localSite; |
| 40 | } |
| 41 | |
| 42 | /** |
| 43 | * @param SearchConfig $config |
| 44 | * @param string|null $cluster |
| 45 | * @param string $localSite |
| 46 | * @return OtherIndexesUpdater |
| 47 | */ |
| 48 | public static function buildOtherIndexesUpdater( SearchConfig $config, $cluster, $localSite ): OtherIndexesUpdater { |
| 49 | $connection = Connection::getPool( $config, $cluster ); |
| 50 | return new self( $connection, $cluster, $localSite ); |
| 51 | } |
| 52 | |
| 53 | /** |
| 54 | * Get the external index identifiers for title. |
| 55 | * @param SearchConfig $config |
| 56 | * @param Title $title |
| 57 | * @param string|null $cluster cluster (as in CirrusSearchWriteClusters) to filter on |
| 58 | * @return ExternalIndex[] array of external indices. |
| 59 | */ |
| 60 | public static function getExternalIndexes( SearchConfig $config, Title $title, $cluster = null ) { |
| 61 | $namespace = $title->getNamespace(); |
| 62 | $indices = []; |
| 63 | foreach ( $config->get( 'CirrusSearchExtraIndexes' )[$namespace] ?? [] as $indexName ) { |
| 64 | $indices[] = new ExternalIndex( $config, $indexName ); |
| 65 | } |
| 66 | return $indices; |
| 67 | } |
| 68 | |
| 69 | /** |
| 70 | * Get any extra indexes to query, if any, based on namespaces |
| 71 | * @param SearchConfig $config |
| 72 | * @param int[] $namespaces An array of namespace ids |
| 73 | * @return ExternalIndex[] array of indexes |
| 74 | */ |
| 75 | public static function getExtraIndexesForNamespaces( SearchConfig $config, array $namespaces ) { |
| 76 | $extraIndexes = []; |
| 77 | foreach ( $config->get( 'CirrusSearchExtraIndexes' ) ?: [] as $namespace => $indexes ) { |
| 78 | if ( !in_array( $namespace, $namespaces ) ) { |
| 79 | continue; |
| 80 | } |
| 81 | foreach ( $indexes as $indexName ) { |
| 82 | $extraIndexes[] = new ExternalIndex( $config, $indexName ); |
| 83 | } |
| 84 | } |
| 85 | return $extraIndexes; |
| 86 | } |
| 87 | |
| 88 | /** |
| 89 | * Update the indexes for other wiki that also store information about $titles. |
| 90 | * @param Title[] $titles array of titles in other indexes to update |
| 91 | */ |
| 92 | public function updateOtherIndex( $titles ) { |
| 93 | if ( !$this->connection->getConfig()->getElement( 'CirrusSearchWikimediaExtraPlugin', 'super_detect_noop' ) ) { |
| 94 | $this->logFailure( $titles, 'super_detect_noop plugin not enabled' ); |
| 95 | return; |
| 96 | } |
| 97 | |
| 98 | $updates = []; |
| 99 | |
| 100 | // Build multisearch to find ids to update |
| 101 | $findIdsMultiSearch = new MultiSearch( $this->connection->getClient() ); |
| 102 | $findIdsClosures = []; |
| 103 | $readClusterName = $this->connection->getConfig()->getClusterAssignment()->getCrossClusterName(); |
| 104 | foreach ( $titles as $title ) { |
| 105 | foreach ( self::getExternalIndexes( $this->connection->getConfig(), $title ) as $otherIndex ) { |
| 106 | $searchIndex = $otherIndex->getSearchIndex( $readClusterName ); |
| 107 | $query = $this->queryForTitle( $title ); |
| 108 | $search = $this->connection->getIndex( $searchIndex )->createSearch( $query ); |
| 109 | $findIdsMultiSearch->addSearch( $search ); |
| 110 | $findIdsClosures[] = static function ( $docId ) use ( $otherIndex, &$updates, $title ) { |
| 111 | // The searchIndex, including the cluster specified, is needed |
| 112 | // as this gets passed to the ExternalIndex constructor in |
| 113 | // the created jobs. |
| 114 | if ( !isset( $updates[spl_object_hash( $otherIndex )] ) ) { |
| 115 | $updates[spl_object_hash( $otherIndex )] = [ $otherIndex, [] ]; |
| 116 | } |
| 117 | $updates[spl_object_hash( $otherIndex )][1][] = [ |
| 118 | 'docId' => $docId, |
| 119 | 'ns' => $title->getNamespace(), |
| 120 | 'dbKey' => $title->getDBkey(), |
| 121 | ]; |
| 122 | }; |
| 123 | } |
| 124 | } |
| 125 | $findIdsClosuresCount = count( $findIdsClosures ); |
| 126 | if ( $findIdsClosuresCount === 0 ) { |
| 127 | // No other indexes to check. |
| 128 | return; |
| 129 | } |
| 130 | |
| 131 | // Look up the ids and run all closures to build the list of updates |
| 132 | $result = $this->runMSearch( |
| 133 | $findIdsMultiSearch, |
| 134 | new MultiSearchRequestLog( |
| 135 | $this->connection->getClient(), |
| 136 | 'searching for {numIds} ids in other indexes', |
| 137 | 'other_idx_lookup', |
| 138 | [ 'numIds' => $findIdsClosuresCount ] |
| 139 | ) |
| 140 | ); |
| 141 | if ( $result->isGood() ) { |
| 142 | /** @var ResultSet $findIdsMultiSearchResult */ |
| 143 | $findIdsMultiSearchResult = $result->getValue(); |
| 144 | foreach ( $findIdsClosures as $i => $closure ) { |
| 145 | $results = $findIdsMultiSearchResult[$i]->getResults(); |
| 146 | if ( count( $results ) ) { |
| 147 | $closure( $results[0]->getId() ); |
| 148 | } |
| 149 | } |
| 150 | $this->runUpdates( reset( $titles ), $updates ); |
| 151 | } |
| 152 | } |
| 153 | |
| 154 | protected function runUpdates( Title $title, array $updates ) { |
| 155 | // These are split into a job per index because the external indexes |
| 156 | // may be configured to write to different clusters. This maintains |
| 157 | // isolation of writes between clusters so one slow cluster doesn't |
| 158 | // drag down the others. |
| 159 | foreach ( $updates as [ $otherIndex, $actions ] ) { |
| 160 | $this->pushElasticaWriteJobs( $actions, function ( array $chunk, ClusterSettings $cluster ) use ( $otherIndex ) { |
| 161 | // Name of the index to write to on whatever cluster is connected to |
| 162 | $indexName = $otherIndex->getIndexName(); |
| 163 | // Index name and, potentially, a replica group identifier. Needed to |
| 164 | // create an appropriate ExternalIndex instance in the job. |
| 165 | $externalIndex = $otherIndex->getGroupAndIndexName(); |
| 166 | return Job\ElasticaWrite::build( |
| 167 | $cluster, |
| 168 | 'sendOtherIndexUpdates', |
| 169 | [ $this->localSite, $indexName, $chunk ], |
| 170 | [ 'external-index' => $externalIndex ] |
| 171 | ); |
| 172 | } ); |
| 173 | } |
| 174 | } |
| 175 | |
| 176 | /** |
| 177 | * @param Title[] $titles |
| 178 | * @param string $reason |
| 179 | */ |
| 180 | private function logFailure( array $titles, $reason = '' ) { |
| 181 | $articleIDs = array_map( static function ( Title $title ) { |
| 182 | return $title->getArticleID(); |
| 183 | }, $titles ); |
| 184 | if ( $reason ) { |
| 185 | $reason = " ($reason)"; |
| 186 | } |
| 187 | LoggerFactory::getInstance( 'CirrusSearchChangeFailed' )->info( |
| 188 | "Other Index$reason for article ids: " . implode( ',', $articleIDs ) ); |
| 189 | } |
| 190 | |
| 191 | /** |
| 192 | * @param Title $title |
| 193 | * @return \Elastica\Query |
| 194 | */ |
| 195 | private function queryForTitle( Title $title ) { |
| 196 | $bool = new \Elastica\Query\BoolQuery(); |
| 197 | |
| 198 | // Note that we need to use the keyword indexing of title so the analyzer gets out of the way. |
| 199 | $bool->addFilter( new \Elastica\Query\Term( [ 'title.keyword' => $title->getText() ] ) ); |
| 200 | $bool->addFilter( new \Elastica\Query\Term( [ 'namespace' => $title->getNamespace() ] ) ); |
| 201 | |
| 202 | $query = new \Elastica\Query( $bool ); |
| 203 | $query->setStoredFields( [] ); // We only need the _id so don't load the _source |
| 204 | $query->setSize( 1 ); |
| 205 | |
| 206 | return $query; |
| 207 | } |
| 208 | |
| 209 | } |