From c1f9b1f7b1b77776192048005dcc66dcf3df2bfb Mon Sep 17 00:00:00 2001
From: Pierre Schmitz <pierre@archlinux.de>
Date: Sat, 27 Dec 2014 15:41:37 +0100
Subject: Update to MediaWiki 1.24.1

---
 includes/jobqueue/jobs/RefreshLinksJob2.php | 141 ++++++++++++++++++++++++++++
 1 file changed, 141 insertions(+)
 create mode 100644 includes/jobqueue/jobs/RefreshLinksJob2.php

(limited to 'includes/jobqueue/jobs/RefreshLinksJob2.php')

diff --git a/includes/jobqueue/jobs/RefreshLinksJob2.php b/includes/jobqueue/jobs/RefreshLinksJob2.php
new file mode 100644
index 00000000..97405aeb
--- /dev/null
+++ b/includes/jobqueue/jobs/RefreshLinksJob2.php
@@ -0,0 +1,141 @@
+<?php
+/**
+ * Job to update links for a given title.
+ *
+ * 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
+ * @ingroup JobQueue
+ */
+
+/**
+ * Background job to update links for titles in certain backlink range by page ID.
+ * Newer version for high use templates. This is deprecated by RefreshLinksPartitionJob.
+ *
+ * @ingroup JobQueue
+ * @deprecated since 1.23
+ */
+class RefreshLinksJob2 extends Job {
+	function __construct( $title, $params ) {
+		parent::__construct( 'refreshLinks2', $title, $params );
+		// Base jobs for large templates can easily be de-duplicated
+		$this->removeDuplicates = !isset( $params['start'] ) && !isset( $params['end'] );
+	}
+
+	/**
+	 * Run a refreshLinks2 job
+	 * @return bool Success
+	 */
+	function run() {
+		global $wgUpdateRowsPerJob;
+
+		$linkCache = LinkCache::singleton();
+		$linkCache->clear();
+
+		if ( is_null( $this->title ) ) {
+			$this->error = "refreshLinks2: Invalid title";
+			return false;
+		}
+
+		// Back compat for pre-r94435 jobs
+		$table = isset( $this->params['table'] ) ? $this->params['table'] : 'templatelinks';
+
+		// Avoid slave lag when fetching templates.
+		// When the outermost job is run, we know that the caller that enqueued it must have
+		// committed the relevant changes to the DB by now. At that point, record the master
+		// position and pass it along as the job recursively breaks into smaller range jobs.
+		// Hopefully, when leaf jobs are popped, the slaves will have reached that position.
+		if ( isset( $this->params['masterPos'] ) ) {
+			$masterPos = $this->params['masterPos'];
+		} elseif ( wfGetLB()->getServerCount() > 1 ) {
+			$masterPos = wfGetLB()->getMasterPos();
+		} else {
+			$masterPos = false;
+		}
+
+		$tbc = $this->title->getBacklinkCache();
+
+		$jobs = array(); // jobs to insert
+		if ( isset( $this->params['start'] ) && isset( $this->params['end'] ) ) {
+			# This is a partition job to trigger the insertion of leaf jobs...
+			$jobs = array_merge( $jobs, $this->getSingleTitleJobs( $table, $masterPos ) );
+		} else {
+			# This is a base job to trigger the insertion of partitioned jobs...
+			if ( $tbc->getNumLinks( $table, $wgUpdateRowsPerJob + 1 ) <= $wgUpdateRowsPerJob ) {
+				# Just directly insert the single per-title jobs
+				$jobs = array_merge( $jobs, $this->getSingleTitleJobs( $table, $masterPos ) );
+			} else {
+				# Insert the partition jobs to make per-title jobs
+				foreach ( $tbc->partition( $table, $wgUpdateRowsPerJob ) as $batch ) {
+					list( $start, $end ) = $batch;
+					$jobs[] = new RefreshLinksJob2( $this->title,
+						array(
+							'table' => $table,
+							'start' => $start,
+							'end' => $end,
+							'masterPos' => $masterPos,
+						) + $this->getRootJobParams() // carry over information for de-duplication
+					);
+				}
+			}
+		}
+
+		if ( count( $jobs ) ) {
+			JobQueueGroup::singleton()->push( $jobs );
+		}
+
+		return true;
+	}
+
+	/**
+	 * @param string $table
+	 * @param mixed $masterPos
+	 * @return array
+	 */
+	protected function getSingleTitleJobs( $table, $masterPos ) {
+		# The "start"/"end" fields are not set for the base jobs
+		$start = isset( $this->params['start'] ) ? $this->params['start'] : false;
+		$end = isset( $this->params['end'] ) ? $this->params['end'] : false;
+		$titles = $this->title->getBacklinkCache()->getLinks( $table, $start, $end );
+		# Convert into single page refresh links jobs.
+		# This handles well when in sapi mode and is useful in any case for job
+		# de-duplication. If many pages use template A, and that template itself
+		# uses template B, then an edit to both will create many duplicate jobs.
+		# Roughly speaking, for each page, one of the "RefreshLinksJob" jobs will
+		# get run first, and when it does, it will remove the duplicates. Of course,
+		# one page could have its job popped when the other page's job is still
+		# buried within the logic of a refreshLinks2 job.
+		$jobs = array();
+		foreach ( $titles as $title ) {
+			$jobs[] = new RefreshLinksJob( $title,
+				array( 'masterPos' => $masterPos ) + $this->getRootJobParams()
+			); // carry over information for de-duplication
+		}
+		return $jobs;
+	}
+
+	/**
+	 * @return array
+	 */
+	public function getDeduplicationInfo() {
+		$info = parent::getDeduplicationInfo();
+		// Don't let highly unique "masterPos" values ruin duplicate detection
+		if ( is_array( $info['params'] ) ) {
+			unset( $info['params']['masterPos'] );
+		}
+		return $info;
+	}
+}
-- 
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