Describe and execute a background job. More...

Inherits RunnableJob.

Inherited by AssembleUploadChunksJob, CategoryMembershipChangeJob, CdnPurgeJob, DeleteLinksJob, DeletePageJob, DoubleRedirectJob, DuplicateJob, EmaillingJob, EnotifNotifyJob, HTMLCacheUpdateJob, MediaWiki\RenameUser\RenameUserJob, MediaWiki\Watchlist\ActivityUpdateJob, MediaWiki\Watchlist\ClearUserWatchlistJob, MediaWiki\Watchlist\ClearWatchlistNotificationsJob, MediaWiki\Watchlist\WatchlistExpiryJob, NullJob, ParsoidCachePrewarmJob, PublishStashedFileJob, RecentChangesUpdateJob, RefreshLinksJob, RevertedTagUpdateJob, ThumbnailRenderJob, UploadFromUrlJob, UserEditCountInitJob, UserGroupExpiryJob, and UserOptionsUpdateJob.

Collaboration diagram for Job:

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Public Member Functions

__construct ( $command, $params=null)

allowRetries ()

Whether to retry execution of this job if run() returned false or threw an exception.

Warning: In some setups (i.e. when using change-propagation) jobs may still be retried even when this is false if the job fails due to a timeout unless it is also configured in change-prop config (T358939).

Returns: bool Whether this job can be retried on failure by job runners

Since: 1.21

getDeduplicationInfo ()

Subclasses may need to override this to make duplication detection work.

getLastError ()

Returns: string

getMetadata ( $field=null)

getParams ()

Returns: array Parameters that specify sources, targets, and options for execution

getQueuedTimestamp ()

getReadyTimestamp ()

Returns: int|null UNIX timestamp of when the job was runnable, or null

Since: 1.26

getReleaseTimestamp ()

getRequestId ()

Returns: string|null Id of the request that created this job. Follows jobs recursively, allowing to track the id of the request that started a job when jobs insert jobs which insert other jobs.

Since: 1.27

getRootJobParams ()

getTitle ()

getType ()

Returns: string Job type that defines what sort of changes this job makes

hasExecutionFlag ( $flag)

Parameters

int $flag JOB_* class constant

Returns: bool

Since: 1.31

hasRootJobParams ()

ignoreDuplicates ()

Whether the queue should reject insertion of this job if a duplicate exists.

isRootJob ()

setMetadata ( $field, $value)

teardown ( $status)

toString ()

Returns: string Debugging string describing the job

workItemCount ()

Public Member Functions inherited from RunnableJob

run ()

Run the job.

tearDown ( $status)

Do any final cleanup after run(), deferred updates, and all DB commits happen.

Static Public Member Functions
static	factory ( $command, $params=[])
	Create the appropriate object to handle a specific job.

static	newRootJobParams ( $key)
	Get "root job" parameters for a task.

Public Attributes
string	$command

array	$metadata = []
	Additional queue metadata.

array	$params
	Array of job parameters.

Protected Member Functions
	addTeardownCallback ( $callback)

	setLastError ( $error)

Protected Attributes
string	$error
	Text for error that occurred last.

int	$executionFlags = 0
	Bitfield of JOB_* class constants.

bool	$removeDuplicates = false
	Expensive jobs may set this to true.

callable[]	$teardownCallbacks = []

Title	$title

Detailed Description

Describe and execute a background job.

Callers should use JobQueueGroup to enqueue jobs for deferred execution.

See the architecture doc for more information.

Stability: stable: to extend

Since: 1.6

Definition at line 38 of file Job.php.

Constructor & Destructor Documentation

◆ __construct()

Job::__construct	(		$command,
			$params = null )

Stability: stable: to call

Parameters

string	$command
array \| PageReference \| null	$params

Definition at line 86 of file Job.php.

References $params, and NS_SPECIAL.

Member Function Documentation

◆ addTeardownCallback()

Job::addTeardownCallback ( $callback )

protected

Parameters

callable $callback A function with one parameter, the success status, which will be false if the job failed or it succeeded but the DB changes could not be committed or any deferred updates threw an exception. (This parameter was added in 1.28.)

Since: 1.27

Definition at line 353 of file Job.php.

◆ allowRetries()

Job::allowRetries ( )

Whether to retry execution of this job if run() returned false or threw an exception.

Warning: In some setups (i.e. when using change-propagation) jobs may still be retried even when this is false if the job fails due to a timeout unless it is also configured in change-prop config (T358939).

Returns: bool Whether this job can be retried on failure by job runners

Since: 1.21

Stability: stable: to override

Implements RunnableJob.

Reimplemented in AssembleUploadChunksJob, and ThumbnailRenderJob.

Definition at line 245 of file Job.php.

◆ factory()

static Job::factory	(		$command,
			$params = [] )

static

Create the appropriate object to handle a specific job.

Deprecated: since 1.40, use JobFactory instead.

Parameters

string	$command	Job command
array \| PageReference	$params	Job parameters

Returns: Job

Definition at line 72 of file Job.php.

◆ getDeduplicationInfo()

Job::getDeduplicationInfo ( )

Subclasses may need to override this to make duplication detection work.

The resulting map conveys everything that makes the job unique. This is only checked if ignoreDuplicates() returns true, meaning that duplicate jobs are supposed to be ignored.

Stability: stable: to override

Returns: array Map of key/values

Since: 1.21

Implements IJobSpecification.

Reimplemented in AssembleUploadChunksJob, CategoryMembershipChangeJob, HTMLCacheUpdateJob, PublishStashedFileJob, RefreshLinksJob, UploadFromUrlJob, and MediaWiki\Watchlist\ClearUserWatchlistJob.

Definition at line 267 of file Job.php.

References getParams(), and getType().

◆ getLastError()

Job::getLastError ( )

Returns: string

Stability: stable: to override

Implements RunnableJob.

Definition at line 439 of file Job.php.

◆ getMetadata()

Job::getMetadata ( $field = null )

Stability: stable: to override

Parameters

string | null $field Metadata field or null to get all the metadata

Returns: mixed|null Value; null if missing

Since: 1.33

Implements RunnableJob.

Definition at line 163 of file Job.php.

Referenced by setMetadata().

◆ getParams()

Job::getParams ( )

Returns: array Parameters that specify sources, targets, and options for execution

Stability: stable: to override

Implements IJobSpecification.

Definition at line 153 of file Job.php.

References $params.

Referenced by getDeduplicationInfo(), and MediaWiki\Watchlist\ClearUserWatchlistJob\run().

◆ getQueuedTimestamp()

Job::getQueuedTimestamp ( )

Returns: int|null UNIX timestamp of when the job was queued, or null

Since: 1.26

Definition at line 203 of file Job.php.

References wfTimestampOrNull().

Referenced by getReadyTimestamp().

◆ getReadyTimestamp()

Job::getReadyTimestamp ( )

Returns: int|null UNIX timestamp of when the job was runnable, or null

Since: 1.26

Stability: stable: to override

Implements RunnableJob.

Definition at line 220 of file Job.php.

References getQueuedTimestamp(), and getReleaseTimestamp().

◆ getReleaseTimestamp()

Job::getReleaseTimestamp ( )

Stability: stable: to override

Returns: int|null UNIX timestamp to delay running this job until, otherwise null

Since: 1.22

Implements IJobSpecification.

Definition at line 194 of file Job.php.

References wfTimestampOrNull().

Referenced by getReadyTimestamp().

◆ getRequestId()

Job::getRequestId ( )

Returns: string|null Id of the request that created this job. Follows jobs recursively, allowing to track the id of the request that started a job when jobs insert jobs which insert other jobs.

Since: 1.27

Stability: stable: to override

Implements RunnableJob.

Definition at line 212 of file Job.php.

Referenced by DeletePageJob\run().

◆ getRootJobParams()

Job::getRootJobParams ( )

Stability: stable: to override

See also: JobQueue::deduplicateRootJob()

Returns: array

Since: 1.21

Implements IJobSpecification.

Definition at line 320 of file Job.php.

Referenced by HTMLCacheUpdateJob\run(), and RefreshLinksJob\run().

◆ getTitle()

Job::getTitle ( )

final

Returns: Title

Definition at line 145 of file Job.php.

◆ getType()

Job::getType ( )

Returns: string Job type that defines what sort of changes this job makes

Stability: stable: to override

Implements IJobSpecification.

Definition at line 138 of file Job.php.

Referenced by getDeduplicationInfo().

◆ hasExecutionFlag()

Job::hasExecutionFlag ( $flag )

Parameters

int $flag JOB_* class constant

Returns: bool

Since: 1.31

Stability: stable: to override

Implements RunnableJob.

Definition at line 130 of file Job.php.

◆ hasRootJobParams()

Job::hasRootJobParams ( )

Stability: stable: to override

See also: JobQueue::deduplicateRootJob()

Returns: bool

Since: 1.22

Implements IJobSpecification.

Definition at line 333 of file Job.php.

Referenced by isRootJob().

◆ ignoreDuplicates()

Job::ignoreDuplicates ( )

Whether the queue should reject insertion of this job if a duplicate exists.

This can be used to avoid duplicated effort or combined with delayed jobs to coalesce updates into larger batches. Claimed jobs are never treated as duplicates of new jobs, and some queues may allow a few duplicates due to network partitions and fail-over. Thus, additional locking is needed to enforce mutual exclusion if this is really needed.

Stability: stable: to override

Returns: bool

Implements IJobSpecification.

Definition at line 237 of file Job.php.

◆ isRootJob()

Job::isRootJob ( )

Stability: stable: to override

See also: JobQueue::deduplicateRootJob()

Returns: bool Whether this is job is a root job

Implements IJobSpecification.

Definition at line 343 of file Job.php.

References hasRootJobParams().

◆ newRootJobParams()

static Job::newRootJobParams ( $key )

static

Get "root job" parameters for a task.

This is used to no-op redundant jobs, including child jobs of jobs, as long as the children inherit the root job parameters. When a job with root job parameters and "rootJobIsSelf" set is pushed, the deduplicateRootJob() method is automatically called on it. If the root job is only virtual and not actually pushed (e.g. the sub-jobs are inserted directly), then call deduplicateRootJob() directly.

See also: JobQueue::deduplicateRootJob()

Parameters

string $key A key that identifies the task

Returns

array Map of:

rootJobIsSelf : true
rootJobSignature : hash (e.g. SHA1) that identifies the task
rootJobTimestamp : TS_MW timestamp of this instance of the task

Since: 1.21

Definition at line 306 of file Job.php.

References wfTimestampNow().

Referenced by HTMLCacheUpdateJob\newForBacklinks(), and MediaWiki\Deferred\LinksUpdate\LinksUpdate\queueRecursiveJobsForTable().

◆ setLastError()

Job::setLastError ( $error )

protected

Definition at line 431 of file Job.php.

Referenced by MediaWiki\Watchlist\ClearUserWatchlistJob\run().

◆ setMetadata()

Job::setMetadata	(		$field,
			$value )

Stability: stable: to override

Parameters

string	$field	Key name to set the value for
mixed	$value	The value to set the field for

Returns: mixed|null The prior field value; null if missing

Since: 1.33

Implements RunnableJob.

Definition at line 178 of file Job.php.

References getMetadata().

◆ teardown()

Job::teardown ( $status )

Stability: stable: to override

Definition at line 361 of file Job.php.

◆ toString()

Job::toString ( )

Returns: string Debugging string describing the job

Stability: stable: to override

Implements RunnableJob.

Definition at line 371 of file Job.php.

◆ workItemCount()

Job::workItemCount ( )

Stability: stable: to override

Returns: int

Implements RunnableJob.

Reimplemented in HTMLCacheUpdateJob, and RefreshLinksJob.

Definition at line 253 of file Job.php.

Member Data Documentation

◆ $command

string Job::$command

Definition at line 40 of file Job.php.

Referenced by MediaWiki\Watchlist\WatchlistExpiryJob\__construct().

◆ $error

string Job::$error

protected

Text for error that occurred last.

Definition at line 55 of file Job.php.

◆ $executionFlags

int Job::$executionFlags = 0

protected

Bitfield of JOB_* class constants.

Definition at line 61 of file Job.php.

◆ $metadata

array Job::$metadata = []

Additional queue metadata.

Definition at line 46 of file Job.php.

◆ $params

array Job::$params

Array of job parameters.

Definition at line 43 of file Job.php.

Referenced by MediaWiki\Watchlist\ActivityUpdateJob\__construct(), DuplicateJob\__construct(), MediaWiki\Watchlist\ClearUserWatchlistJob\__construct(), MediaWiki\Watchlist\ClearWatchlistNotificationsJob\__construct(), MediaWiki\Watchlist\WatchlistExpiryJob\__construct(), and MediaWiki\RenameUser\RenameUserJob\__construct().

◆ $removeDuplicates

bool Job::$removeDuplicates = false

protected

Expensive jobs may set this to true.

Definition at line 52 of file Job.php.

◆ $teardownCallbacks

callable [] Job::$teardownCallbacks = []

protected

Definition at line 58 of file Job.php.

◆ $title

Title Job::$title

protected

Definition at line 49 of file Job.php.

Referenced by MediaWiki\Watchlist\ActivityUpdateJob\__construct(), MediaWiki\RenameUser\RenameUserJob\__construct(), DoubleRedirectJob\fixRedirects(), DoubleRedirectJob\getFinalDestination(), HTMLCacheUpdateJob\newForBacklinks(), CategoryMembershipChangeJob\notifyUpdatesForRevision(), and RefreshLinksJob\run().

The documentation for this class was generated from the following file:

includes/jobqueue/Job.php

Public Member Functions

Static Public Member Functions

Public Attributes

Protected Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

◆ __construct()

Member Function Documentation

◆ addTeardownCallback()

◆ allowRetries()

◆ factory()

◆ getDeduplicationInfo()

◆ getLastError()

◆ getMetadata()

◆ getParams()

◆ getQueuedTimestamp()

◆ getReadyTimestamp()

◆ getReleaseTimestamp()

◆ getRequestId()

◆ getRootJobParams()

◆ getTitle()

◆ getType()

◆ hasExecutionFlag()

◆ hasRootJobParams()

◆ ignoreDuplicates()

◆ isRootJob()

◆ newRootJobParams()

◆ setLastError()

◆ setMetadata()

◆ teardown()

◆ toString()

◆ workItemCount()

Member Data Documentation

◆ $command

◆ $error

◆ $executionFlags

◆ $metadata

◆ $params

◆ $removeDuplicates

◆ $teardownCallbacks

◆ $title