From 7293699561f8751c66d55697e63b13a18653ac6b Mon Sep 17 00:00:00 2001 From: Aaron Schulz Date: Sun, 10 Mar 2013 00:06:02 -0800 Subject: [PATCH] Refactored use of $wgMemc in JobQueueDB to use a field. Change-Id: Ic2a0a16142abdc5a971729fe550c10c1b8fa42b9 --- includes/job/JobQueueDB.php | 62 ++++++++++++++----------------------- 1 file changed, 24 insertions(+), 38 deletions(-) diff --git a/includes/job/JobQueueDB.php b/includes/job/JobQueueDB.php index a7a459f5cf..6ab11dc482 100644 --- a/includes/job/JobQueueDB.php +++ b/includes/job/JobQueueDB.php @@ -35,6 +35,9 @@ class JobQueueDB extends JobQueue { const MAX_JOB_RANDOM = 2147483647; // integer; 2^31 - 1, used for job_random const MAX_OFFSET = 255; // integer; maximum number of rows to skip + /** @var BagOStuff */ + protected $cache; + protected $cluster = false; // string; name of an external DB cluster /** @@ -48,6 +51,7 @@ class JobQueueDB extends JobQueue { protected function __construct( array $params ) { parent::__construct( $params ); $this->cluster = isset( $params['cluster'] ) ? $params['cluster'] : false; + $this->cache = wfGetMainCache(); } protected function supportedOrders() { @@ -63,11 +67,9 @@ class JobQueueDB extends JobQueue { * @return bool */ protected function doIsEmpty() { - global $wgMemc; - $key = $this->getCacheKey( 'empty' ); - $isEmpty = $wgMemc->get( $key ); + $isEmpty = $this->cache->get( $key ); if ( $isEmpty === 'true' ) { return true; } elseif ( $isEmpty === 'false' ) { @@ -78,7 +80,7 @@ class JobQueueDB extends JobQueue { $found = $dbr->selectField( // unclaimed job 'job', '1', array( 'job_cmd' => $this->type, 'job_token' => '' ), __METHOD__ ); - $wgMemc->add( $key, $found ? 'false' : 'true', self::CACHE_TTL_LONG ); + $this->cache->add( $key, $found ? 'false' : 'true', self::CACHE_TTL_LONG ); return !$found; } @@ -88,11 +90,9 @@ class JobQueueDB extends JobQueue { * @return integer */ protected function doGetSize() { - global $wgMemc; - $key = $this->getCacheKey( 'size' ); - $size = $wgMemc->get( $key ); + $size = $this->cache->get( $key ); if ( is_int( $size ) ) { return $size; } @@ -102,7 +102,7 @@ class JobQueueDB extends JobQueue { array( 'job_cmd' => $this->type, 'job_token' => '' ), __METHOD__ ); - $wgMemc->set( $key, $size, self::CACHE_TTL_SHORT ); + $this->cache->set( $key, $size, self::CACHE_TTL_SHORT ); return $size; } @@ -112,15 +112,13 @@ class JobQueueDB extends JobQueue { * @return integer */ protected function doGetAcquiredCount() { - global $wgMemc; - if ( $this->claimTTL <= 0 ) { return 0; // no acknowledgements } $key = $this->getCacheKey( 'acquiredcount' ); - $count = $wgMemc->get( $key ); + $count = $this->cache->get( $key ); if ( is_int( $count ) ) { return $count; } @@ -130,7 +128,7 @@ class JobQueueDB extends JobQueue { array( 'job_cmd' => $this->type, "job_token != {$dbr->addQuotes( '' )}" ), __METHOD__ ); - $wgMemc->set( $key, $count, self::CACHE_TTL_SHORT ); + $this->cache->set( $key, $count, self::CACHE_TTL_SHORT ); return $count; } @@ -160,12 +158,11 @@ class JobQueueDB extends JobQueue { $key = $this->getCacheKey( 'empty' ); $atomic = ( $flags & self::QoS_Atomic ); + $cache = $this->cache; $dbw->onTransactionIdle( - function() use ( $dbw, $rowSet, $rowList, $atomic, $key, $scope + function() use ( $dbw, $cache, $rowSet, $rowList, $atomic, $key, $scope ) { - global $wgMemc; - if ( $atomic ) { $dbw->begin( __METHOD__ ); // wrap all the job additions in one transaction } @@ -204,7 +201,7 @@ class JobQueueDB extends JobQueue { $dbw->commit( __METHOD__ ); } - $wgMemc->set( $key, 'false', JobQueueDB::CACHE_TTL_LONG ); + $cache->set( $key, 'false', JobQueueDB::CACHE_TTL_LONG ); } ); } @@ -216,9 +213,7 @@ class JobQueueDB extends JobQueue { * @return Job|bool */ protected function doPop() { - global $wgMemc; - - if ( $wgMemc->get( $this->getCacheKey( 'empty' ) ) === 'true' ) { + if ( $this->cache->get( $this->getCacheKey( 'empty' ) ) === 'true' ) { return false; // queue is empty } @@ -238,7 +233,7 @@ class JobQueueDB extends JobQueue { } // Check if we found a row to reserve... if ( !$row ) { - $wgMemc->set( $this->getCacheKey( 'empty' ), 'true', self::CACHE_TTL_LONG ); + $this->cache->set( $this->getCacheKey( 'empty' ), 'true', self::CACHE_TTL_LONG ); break; // nothing to do } wfIncrStats( 'job-pop' ); @@ -272,11 +267,9 @@ class JobQueueDB extends JobQueue { * @return Row|false */ protected function claimRandom( $uuid, $rand, $gte ) { - global $wgMemc; - list( $dbw, $scope ) = $this->getMasterDB(); // Check cache to see if the queue has <= OFFSET items - $tinyQueue = $wgMemc->get( $this->getCacheKey( 'small' ) ); + $tinyQueue = $this->cache->get( $this->getCacheKey( 'small' ) ); $row = false; // the row acquired $invertedDirection = false; // whether one job_random direction was already scanned @@ -317,7 +310,7 @@ class JobQueueDB extends JobQueue { ); if ( !$row ) { $tinyQueue = true; // we know the queue must have <= MAX_OFFSET rows - $wgMemc->set( $this->getCacheKey( 'small' ), 1, 30 ); + $this->cache->set( $this->getCacheKey( 'small' ), 1, 30 ); continue; // use job_random } } @@ -410,8 +403,6 @@ class JobQueueDB extends JobQueue { * @return integer Number of jobs recycled/deleted */ public function recycleAndDeleteStaleJobs() { - global $wgMemc; - $now = time(); list( $dbw, $scope ) = $this->getMasterDB(); $count = 0; // affected rows @@ -449,7 +440,7 @@ class JobQueueDB extends JobQueue { ); $count += $dbw->affectedRows(); wfIncrStats( 'job-recycle', $dbw->affectedRows() ); - $wgMemc->set( $this->getCacheKey( 'empty' ), 'false', self::CACHE_TTL_LONG ); + $this->cache->set( $this->getCacheKey( 'empty' ), 'false', self::CACHE_TTL_LONG ); } } @@ -518,16 +509,15 @@ class JobQueueDB extends JobQueue { // maintained. Having only the de-duplication registration succeed would cause // jobs to become no-ops without any actual jobs that made them redundant. list( $dbw, $scope ) = $this->getMasterDB(); - $dbw->onTransactionIdle( function() use ( $params, $key, $scope ) { - global $wgMemc; - - $timestamp = $wgMemc->get( $key ); // current last timestamp of this job + $cache = $this->cache; + $dbw->onTransactionIdle( function() use ( $cache, $params, $key, $scope ) { + $timestamp = $cache->get( $key ); // current last timestamp of this job if ( $timestamp && $timestamp >= $params['rootJobTimestamp'] ) { return true; // a newer version of this root job was enqueued } // Update the timestamp of the last root job started at the location... - return $wgMemc->set( $key, $params['rootJobTimestamp'], JobQueueDB::ROOTJOB_TTL ); + return $cache->set( $key, $params['rootJobTimestamp'], JobQueueDB::ROOTJOB_TTL ); } ); return true; @@ -540,8 +530,6 @@ class JobQueueDB extends JobQueue { * @return bool */ protected function isRootJobOldDuplicate( Job $job ) { - global $wgMemc; - $params = $job->getParams(); if ( !isset( $params['rootJobSignature'] ) ) { return false; // job has no de-deplication info @@ -551,7 +539,7 @@ class JobQueueDB extends JobQueue { } // Get the last time this root job was enqueued - $timestamp = $wgMemc->get( $this->getRootJobCacheKey( $params['rootJobSignature'] ) ); + $timestamp = $this->cache->get( $this->getRootJobCacheKey( $params['rootJobSignature'] ) ); // Check if a new root job was started at the location after this one's... return ( $timestamp && $timestamp > $params['rootJobTimestamp'] ); @@ -581,10 +569,8 @@ class JobQueueDB extends JobQueue { * @return void */ protected function doFlushCaches() { - global $wgMemc; - foreach ( array( 'empty', 'size', 'acquiredcount' ) as $type ) { - $wgMemc->delete( $this->getCacheKey( $type ) ); + $this->cache->delete( $this->getCacheKey( $type ) ); } } -- 2.20.1