MediaWiki 1.30.2

[autoinstallsdev/mediawiki.git] / includes / HTMLCacheUpdate.php

diff --git a/includes/HTMLCacheUpdate.php b/includes/HTMLCacheUpdate.php
deleted file mode 100644 (file)
index bd63c07..0000000
--- a/includes/HTMLCacheUpdate.php
+++ /dev/null
@@ -1,140 +0,0 @@
-<?php
-
-/**
- * Class to invalidate the HTML cache of all the pages linking to a given title.
- * Small numbers of links will be done immediately, large numbers are pushed onto
- * the job queue.
- *
- * This class is designed to work efficiently with small numbers of links, and
- * to work reasonably well with up to ~10^5 links. Above ~10^6 links, the memory
- * and time requirements of loading all backlinked IDs in doUpdate() might become
- * prohibitive. The requirements measured at Wikimedia are approximately:
- *
- *   memory: 48 bytes per row
- *   time: 16us per row for the query plus processing
- *
- * The reason this query is done is to support partitioning of the job
- * by backlinked ID. The memory issue could be allieviated by doing this query in
- * batches, but of course LIMIT with an offset is inefficient on the DB side.
- *
- * The class is nevertheless a vast improvement on the previous method of using
- * Image::getLinksTo() and Title::touchArray(), which uses about 2KB of memory per
- * link.
- *
- * @ingroup Cache
- */
-class HTMLCacheUpdate
-{
-       public $mTitle, $mTable, $mPrefix;
-       public $mRowsPerJob, $mRowsPerQuery;
-
-       function __construct( $titleTo, $table ) {
-               global $wgUpdateRowsPerJob, $wgUpdateRowsPerQuery;
-
-               $this->mTitle = $titleTo;
-               $this->mTable = $table;
-               $this->mRowsPerJob = $wgUpdateRowsPerJob;
-               $this->mRowsPerQuery = $wgUpdateRowsPerQuery;
-               $this->mCache = $this->mTitle->getBacklinkCache();
-       }
-
-       public function doUpdate() {
-               # Fetch the IDs
-               $numRows = $this->mCache->getNumLinks( $this->mTable );
-
-               if ( $numRows != 0 ) {
-                       if ( $numRows > $this->mRowsPerJob ) {
-                               $this->insertJobs();
-                       } else {
-                               $this->invalidate();
-                       }
-               }
-               wfRunHooks( 'HTMLCacheUpdate::doUpdate', array($this->mTitle) );
-       }
-
-       protected function insertJobs() {
-               $batches = $this->mCache->partition( $this->mTable, $this->mRowsPerJob );
-               if ( !$batches ) {
-                       return;
-               }
-               foreach ( $batches as $batch ) {
-                       $params = array(
-                               'table' => $this->mTable,
-                               'start' => $batch[0],
-                               'end' => $batch[1],
-                       );
-                       $jobs[] = new HTMLCacheUpdateJob( $this->mTitle, $params );
-               }
-               Job::batchInsert( $jobs );
-       }
-
-
-       /**
-        * Invalidate a set of pages, right now
-        */
-       public function invalidate( $startId = false, $endId = false ) {
-               global $wgUseFileCache, $wgUseSquid;
-
-               $titleArray = $this->mCache->getLinks( $this->mTable, $startId, $endId );
-               if ( $titleArray->count() == 0 ) {
-                       return;
-               }
-
-               $dbw = wfGetDB( DB_MASTER );
-               $timestamp = $dbw->timestamp();
-
-               # Get all IDs in this query into an array
-               $ids = array();
-               foreach ( $titleArray as $title ) {
-                       $ids[] = $title->getArticleID();
-               }
-               # Update page_touched
-               $dbw->update( 'page',
-                       array( 'page_touched' => $timestamp ),
-                       array( 'page_id IN (' . $dbw->makeList( $ids ) . ')' ),
-                       __METHOD__
-               );
-
-               # Update squid
-               if ( $wgUseSquid ) {
-                       $u = SquidUpdate::newFromTitles( $titleArray );
-                       $u->doUpdate();
-               }
-
-               # Update file cache
-               if  ( $wgUseFileCache ) {
-                       foreach ( $titleArray as $title ) {
-                               HTMLFileCache::clearFileCache( $title );
-                       }
-               }
-       }
-}
-
-/**
- * Job wrapper for HTMLCacheUpdate. Gets run whenever a related
- * job gets called from the queue.
- * 
- * @ingroup JobQueue
- */
-class HTMLCacheUpdateJob extends Job {
-       var $table, $start, $end;
-
-       /**
-        * Construct a job
-        * @param Title $title The title linked to
-        * @param array $params Job parameters (table, start and end page_ids)
-        * @param integer $id job_id
-        */
-       function __construct( $title, $params, $id = 0 ) {
-               parent::__construct( 'htmlCacheUpdate', $title, $params, $id );
-               $this->table = $params['table'];
-               $this->start = $params['start'];
-               $this->end = $params['end'];
-       }
-
-       public function run() {
-               $update = new HTMLCacheUpdate( $this->title, $this->table );
-               $update->invalidate( $this->start, $this->end );
-               return true;
-       }
-}