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-rw-r--r--includes/job/JobQueueGroup.php427
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diff --git a/includes/job/JobQueueGroup.php b/includes/job/JobQueueGroup.php
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-<?php
-/**
- * Job queue base code.
- *
- * 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
- * @author Aaron Schulz
- */
-
-/**
- * Class to handle enqueueing of background jobs
- *
- * @ingroup JobQueue
- * @since 1.21
- */
-class JobQueueGroup {
- /** @var Array */
- protected static $instances = array();
-
- /** @var ProcessCacheLRU */
- protected $cache;
-
- protected $wiki; // string; wiki ID
-
- /** @var array Map of (bucket => (queue => JobQueue, types => list of types) */
- protected $coalescedQueues;
-
- const TYPE_DEFAULT = 1; // integer; jobs popped by default
- const TYPE_ANY = 2; // integer; any job
-
- const USE_CACHE = 1; // integer; use process or persistent cache
- const USE_PRIORITY = 2; // integer; respect deprioritization
-
- const PROC_CACHE_TTL = 15; // integer; seconds
-
- const CACHE_VERSION = 1; // integer; cache version
-
- /**
- * @param string $wiki Wiki ID
- */
- protected function __construct( $wiki ) {
- $this->wiki = $wiki;
- $this->cache = new ProcessCacheLRU( 10 );
- }
-
- /**
- * @param string $wiki Wiki ID
- * @return JobQueueGroup
- */
- public static function singleton( $wiki = false ) {
- $wiki = ( $wiki === false ) ? wfWikiID() : $wiki;
- if ( !isset( self::$instances[$wiki] ) ) {
- self::$instances[$wiki] = new self( $wiki );
- }
- return self::$instances[$wiki];
- }
-
- /**
- * Destroy the singleton instances
- *
- * @return void
- */
- public static function destroySingletons() {
- self::$instances = array();
- }
-
- /**
- * Get the job queue object for a given queue type
- *
- * @param $type string
- * @return JobQueue
- */
- public function get( $type ) {
- global $wgJobTypeConf;
-
- $conf = array( 'wiki' => $this->wiki, 'type' => $type );
- if ( isset( $wgJobTypeConf[$type] ) ) {
- $conf = $conf + $wgJobTypeConf[$type];
- } else {
- $conf = $conf + $wgJobTypeConf['default'];
- }
-
- return JobQueue::factory( $conf );
- }
-
- /**
- * Insert jobs into the respective queues of with the belong.
- *
- * This inserts the jobs into the queue specified by $wgJobTypeConf
- * and updates the aggregate job queue information cache as needed.
- *
- * @param $jobs Job|array A single Job or a list of Jobs
- * @throws MWException
- * @return bool
- */
- public function push( $jobs ) {
- $jobs = is_array( $jobs ) ? $jobs : array( $jobs );
-
- $jobsByType = array(); // (job type => list of jobs)
- foreach ( $jobs as $job ) {
- if ( $job instanceof Job ) {
- $jobsByType[$job->getType()][] = $job;
- } else {
- throw new MWException( "Attempted to push a non-Job object into a queue." );
- }
- }
-
- $ok = true;
- foreach ( $jobsByType as $type => $jobs ) {
- if ( $this->get( $type )->push( $jobs ) ) {
- JobQueueAggregator::singleton()->notifyQueueNonEmpty( $this->wiki, $type );
- } else {
- $ok = false;
- }
- }
-
- if ( $this->cache->has( 'queues-ready', 'list' ) ) {
- $list = $this->cache->get( 'queues-ready', 'list' );
- if ( count( array_diff( array_keys( $jobsByType ), $list ) ) ) {
- $this->cache->clear( 'queues-ready' );
- }
- }
-
- return $ok;
- }
-
- /**
- * Pop a job off one of the job queues
- *
- * This pops a job off a queue as specified by $wgJobTypeConf and
- * updates the aggregate job queue information cache as needed.
- *
- * @param $qtype integer|string JobQueueGroup::TYPE_DEFAULT or type string
- * @param $flags integer Bitfield of JobQueueGroup::USE_* constants
- * @return Job|bool Returns false on failure
- */
- public function pop( $qtype = self::TYPE_DEFAULT, $flags = 0 ) {
- if ( is_string( $qtype ) ) { // specific job type
- if ( ( $flags & self::USE_PRIORITY ) && $this->isQueueDeprioritized( $qtype ) ) {
- return false; // back off
- }
- $job = $this->get( $qtype )->pop();
- if ( !$job ) {
- JobQueueAggregator::singleton()->notifyQueueEmpty( $this->wiki, $qtype );
- }
- return $job;
- } else { // any job in the "default" jobs types
- if ( $flags & self::USE_CACHE ) {
- if ( !$this->cache->has( 'queues-ready', 'list', self::PROC_CACHE_TTL ) ) {
- $this->cache->set( 'queues-ready', 'list', $this->getQueuesWithJobs() );
- }
- $types = $this->cache->get( 'queues-ready', 'list' );
- } else {
- $types = $this->getQueuesWithJobs();
- }
-
- if ( $qtype == self::TYPE_DEFAULT ) {
- $types = array_intersect( $types, $this->getDefaultQueueTypes() );
- }
- shuffle( $types ); // avoid starvation
-
- foreach ( $types as $type ) { // for each queue...
- if ( ( $flags & self::USE_PRIORITY ) && $this->isQueueDeprioritized( $type ) ) {
- continue; // back off
- }
- $job = $this->get( $type )->pop();
- if ( $job ) { // found
- return $job;
- } else { // not found
- JobQueueAggregator::singleton()->notifyQueueEmpty( $this->wiki, $type );
- $this->cache->clear( 'queues-ready' );
- }
- }
-
- return false; // no jobs found
- }
- }
-
- /**
- * Acknowledge that a job was completed
- *
- * @param $job Job
- * @return bool
- */
- public function ack( Job $job ) {
- return $this->get( $job->getType() )->ack( $job );
- }
-
- /**
- * Register the "root job" of a given job into the queue for de-duplication.
- * This should only be called right *after* all the new jobs have been inserted.
- *
- * @param $job Job
- * @return bool
- */
- public function deduplicateRootJob( Job $job ) {
- return $this->get( $job->getType() )->deduplicateRootJob( $job );
- }
-
- /**
- * Wait for any slaves or backup queue servers to catch up.
- *
- * This does nothing for certain queue classes.
- *
- * @return void
- * @throws MWException
- */
- public function waitForBackups() {
- global $wgJobTypeConf;
-
- wfProfileIn( __METHOD__ );
- // Try to avoid doing this more than once per queue storage medium
- foreach ( $wgJobTypeConf as $type => $conf ) {
- $this->get( $type )->waitForBackups();
- }
- wfProfileOut( __METHOD__ );
- }
-
- /**
- * Get the list of queue types
- *
- * @return array List of strings
- */
- public function getQueueTypes() {
- return array_keys( $this->getCachedConfigVar( 'wgJobClasses' ) );
- }
-
- /**
- * Get the list of default queue types
- *
- * @return array List of strings
- */
- public function getDefaultQueueTypes() {
- global $wgJobTypesExcludedFromDefaultQueue;
-
- return array_diff( $this->getQueueTypes(), $wgJobTypesExcludedFromDefaultQueue );
- }
-
- /**
- * Get the list of job types that have non-empty queues
- *
- * @return Array List of job types that have non-empty queues
- */
- public function getQueuesWithJobs() {
- $types = array();
- foreach ( $this->getCoalescedQueues() as $info ) {
- $nonEmpty = $info['queue']->getSiblingQueuesWithJobs( $this->getQueueTypes() );
- if ( is_array( $nonEmpty ) ) { // batching features supported
- $types = array_merge( $types, $nonEmpty );
- } else { // we have to go through the queues in the bucket one-by-one
- foreach ( $info['types'] as $type ) {
- if ( !$this->get( $type )->isEmpty() ) {
- $types[] = $type;
- }
- }
- }
- }
- return $types;
- }
-
- /**
- * Get the size of the queus for a list of job types
- *
- * @return Array Map of (job type => size)
- */
- public function getQueueSizes() {
- $sizeMap = array();
- foreach ( $this->getCoalescedQueues() as $info ) {
- $sizes = $info['queue']->getSiblingQueueSizes( $this->getQueueTypes() );
- if ( is_array( $sizes ) ) { // batching features supported
- $sizeMap = $sizeMap + $sizes;
- } else { // we have to go through the queues in the bucket one-by-one
- foreach ( $info['types'] as $type ) {
- $sizeMap[$type] = $this->get( $type )->getSize();
- }
- }
- }
- return $sizeMap;
- }
-
- /**
- * @return array
- */
- protected function getCoalescedQueues() {
- global $wgJobTypeConf;
-
- if ( $this->coalescedQueues === null ) {
- $this->coalescedQueues = array();
- foreach ( $wgJobTypeConf as $type => $conf ) {
- $queue = JobQueue::factory(
- array( 'wiki' => $this->wiki, 'type' => 'null' ) + $conf );
- $loc = $queue->getCoalesceLocationInternal();
- if ( !isset( $this->coalescedQueues[$loc] ) ) {
- $this->coalescedQueues[$loc]['queue'] = $queue;
- $this->coalescedQueues[$loc]['types'] = array();
- }
- if ( $type === 'default' ) {
- $this->coalescedQueues[$loc]['types'] = array_merge(
- $this->coalescedQueues[$loc]['types'],
- array_diff( $this->getQueueTypes(), array_keys( $wgJobTypeConf ) )
- );
- } else {
- $this->coalescedQueues[$loc]['types'][] = $type;
- }
- }
- }
-
- return $this->coalescedQueues;
- }
-
- /**
- * Check if jobs should not be popped of a queue right now.
- * This is only used for performance, such as to avoid spamming
- * the queue with many sub-jobs before they actually get run.
- *
- * @param $type string
- * @return bool
- */
- public function isQueueDeprioritized( $type ) {
- if ( $this->cache->has( 'isDeprioritized', $type, 5 ) ) {
- return $this->cache->get( 'isDeprioritized', $type );
- }
- if ( $type === 'refreshLinks2' ) {
- // Don't keep converting refreshLinks2 => refreshLinks jobs if the
- // later jobs have not been done yet. This helps throttle queue spam.
- $deprioritized = !$this->get( 'refreshLinks' )->isEmpty();
- $this->cache->set( 'isDeprioritized', $type, $deprioritized );
- return $deprioritized;
- }
- return false;
- }
-
- /**
- * Execute any due periodic queue maintenance tasks for all queues.
- *
- * A task is "due" if the time ellapsed since the last run is greater than
- * the defined run period. Concurrent calls to this function will cause tasks
- * to be attempted twice, so they may need their own methods of mutual exclusion.
- *
- * @return integer Number of tasks run
- */
- public function executeReadyPeriodicTasks() {
- global $wgMemc;
-
- list( $db, $prefix ) = wfSplitWikiID( $this->wiki );
- $key = wfForeignMemcKey( $db, $prefix, 'jobqueuegroup', 'taskruns', 'v1' );
- $lastRuns = $wgMemc->get( $key ); // (queue => task => UNIX timestamp)
-
- $count = 0;
- $tasksRun = array(); // (queue => task => UNIX timestamp)
- foreach ( $this->getQueueTypes() as $type ) {
- $queue = $this->get( $type );
- foreach ( $queue->getPeriodicTasks() as $task => $definition ) {
- if ( $definition['period'] <= 0 ) {
- continue; // disabled
- } elseif ( !isset( $lastRuns[$type][$task] )
- || $lastRuns[$type][$task] < ( time() - $definition['period'] ) )
- {
- try {
- if ( call_user_func( $definition['callback'] ) !== null ) {
- $tasksRun[$type][$task] = time();
- ++$count;
- }
- } catch ( JobQueueError $e ) {
- MWExceptionHandler::logException( $e );
- }
- }
- }
- }
-
- $wgMemc->merge( $key, function( $cache, $key, $lastRuns ) use ( $tasksRun ) {
- if ( is_array( $lastRuns ) ) {
- foreach ( $tasksRun as $type => $tasks ) {
- foreach ( $tasks as $task => $timestamp ) {
- if ( !isset( $lastRuns[$type][$task] )
- || $timestamp > $lastRuns[$type][$task] )
- {
- $lastRuns[$type][$task] = $timestamp;
- }
- }
- }
- } else {
- $lastRuns = $tasksRun;
- }
- return $lastRuns;
- } );
-
- return $count;
- }
-
- /**
- * @param $name string
- * @return mixed
- */
- private function getCachedConfigVar( $name ) {
- global $wgConf, $wgMemc;
-
- if ( $this->wiki === wfWikiID() ) {
- return $GLOBALS[$name]; // common case
- } else {
- list( $db, $prefix ) = wfSplitWikiID( $this->wiki );
- $key = wfForeignMemcKey( $db, $prefix, 'configvalue', $name );
- $value = $wgMemc->get( $key ); // ('v' => ...) or false
- if ( is_array( $value ) ) {
- return $value['v'];
- } else {
- $value = $wgConf->getConfig( $this->wiki, $name );
- $wgMemc->set( $key, array( 'v' => $value ), 86400 + mt_rand( 0, 86400 ) );
- return $value;
- }
- }
- }
-}
generated by cgit v1.2.2 (git 2.25.0) at 2024-04-24 23:27:18 +0000