From 370e83bb0dfd0c70de268c93bf07ad5ee0897192 Mon Sep 17 00:00:00 2001
From: Pierre Schmitz <pierre@archlinux.de>
Date: Fri, 15 Aug 2008 01:29:47 +0200
Subject: Update auf 1.13.0

---
 includes/JobQueue.php | 57 +++++++++++++++++++++++++++++++++++----------------
 1 file changed, 39 insertions(+), 18 deletions(-)

(limited to 'includes/JobQueue.php')

diff --git a/includes/JobQueue.php b/includes/JobQueue.php
index 5cec3106..8bfd1b3e 100644
--- a/includes/JobQueue.php
+++ b/includes/JobQueue.php
@@ -1,4 +1,7 @@
 <?php
+/**
+ * @defgroup JobQueue JobQueue
+ */
 
 if ( !defined( 'MEDIAWIKI' ) ) {
 	die( "This file is part of MediaWiki, it is not a valid entry point\n" );
@@ -6,6 +9,8 @@ if ( !defined( 'MEDIAWIKI' ) ) {
 
 /**
  * Class to both describe a background job and handle jobs.
+ *
+ * @ingroup JobQueue
  */
 abstract class Job {
 	var $command,
@@ -37,8 +42,8 @@ abstract class Job {
 	 */
 
 	/**
-	 * Pop a job of a certain type.  This tries less hard than pop() to 
-	 * actually find a job; it may be adversely affected by concurrent job 
+	 * Pop a job of a certain type.  This tries less hard than pop() to
+	 * actually find a job; it may be adversely affected by concurrent job
 	 * runners.
 	 */
 	static function pop_type($type) {
@@ -78,7 +83,7 @@ abstract class Job {
 
 	/**
 	 * Pop a job off the front of the queue
-	 * @static
+	 *
 	 * @param $offset Number of jobs to skip
 	 * @return Job or false if there's no jobs
 	 */
@@ -87,11 +92,11 @@ abstract class Job {
 
 		$dbr = wfGetDB( DB_SLAVE );
 
-		/* Get a job from the slave, start with an offset, 
+		/* Get a job from the slave, start with an offset,
 			scan full set afterwards, avoid hitting purged rows
 
-			NB: If random fetch previously was used, offset 
-				will always be ahead of few entries 
+			NB: If random fetch previously was used, offset
+				will always be ahead of few entries
 		*/
 
 		$row = $dbr->selectRow( 'job', '*', "job_id >= ${offset}", __METHOD__,
@@ -158,7 +163,10 @@ abstract class Job {
 		$job = Job::factory( $row->job_cmd, $title, Job::extractBlob( $row->job_params ), $row->job_id );
 
 		// Remove any duplicates it may have later in the queue
+		// Deadlock prone section
+		$dbw->begin();
 		$dbw->delete( 'job', $job->insertFields(), __METHOD__ );
+		$dbw->commit();
 
 		wfProfileOut( __METHOD__ );
 		return $job;
@@ -167,10 +175,10 @@ abstract class Job {
 	/**
 	 * Create the appropriate object to handle a specific job
 	 *
-	 * @param string $command Job command
-	 * @param Title $title Associated title
-	 * @param array $params Job parameters
-	 * @param int $id Job identifier
+	 * @param $command String: Job command
+	 * @param $title Title: Associated title
+	 * @param $params Array: Job parameters
+	 * @param $id Int: Job identifier
 	 * @return Job
 	 */
 	static function factory( $command, $title, $params = false, $id = 0 ) {
@@ -181,7 +189,7 @@ abstract class Job {
 		}
 		throw new MWException( "Invalid job command `{$command}`" );
 	}
-		
+
 	static function makeBlob( $params ) {
 		if ( $params !== false ) {
 			return serialize( $params );
@@ -208,12 +216,23 @@ abstract class Job {
 	 * @param $jobs array of Job objects
 	 */
 	static function batchInsert( $jobs ) {
-		if( count( $jobs ) ) {
-			$dbw = wfGetDB( DB_MASTER );
-			$dbw->begin();
-			foreach( $jobs as $job ) {
-				$rows[] = $job->insertFields();
+		if( !count( $jobs ) ) {
+			return;
+		}
+		$dbw = wfGetDB( DB_MASTER );
+		$rows = array();
+		foreach( $jobs as $job ) {
+			$rows[] = $job->insertFields();
+			if ( count( $rows ) >= 50 ) {
+				# Do a small transaction to avoid slave lag
+				$dbw->begin();
+				$dbw->insert( 'job', $rows, __METHOD__, 'IGNORE' );
+				$dbw->commit();
+				$rows = array();
 			}
+		}
+		if ( $rows ) {
+			$dbw->begin();
 			$dbw->insert( 'job', $rows, __METHOD__, 'IGNORE' );
 			$dbw->commit();
 		}
@@ -283,9 +302,11 @@ abstract class Job {
 		}
 	}
 
+	protected function setLastError( $error ) {
+		$this->error = $error;
+	}
+
 	function getLastError() {
 		return $this->error;
 	}
 }
-
-
-- 
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