Class to handle job queues stored in Redis. More...

Inheritance diagram for JobQueueRedis:

Collaboration diagram for JobQueueRedis:

Public Member Functions
	__construct (array $params)

	getAllAbandonedJobs ()

	getAllAcquiredJobs ()

	getAllDelayedJobs ()

	getAllQueuedJobs ()

	getCoalesceLocationInternal ()

	getJobFromUidInternal ($uid, RedisConnRef $conn)
	This function should not be called outside JobQueueRedis. More...

	getServerQueuesWithJobs ()

Public Member Functions inherited from JobQueue
	ack (Job $job)
	Acknowledge that a job was completed. More...

	batchPush (array $jobs, $flags=0)
	Push a batch of jobs into the queue. More...

	deduplicateRootJob (IJobSpecification $job)
	Register the "root job" of a given job into the queue for de-duplication. More...

	delayedJobsEnabled ()

	delete ()
	Deleted all unclaimed and delayed jobs from the queue. More...

	flushCaches ()
	Clear any process and persistent caches. More...

	getAbandonedCount ()
	Get the number of acquired jobs that can no longer be attempted. More...

	getAcquiredCount ()
	Get the number of acquired jobs (these are temporarily out of the queue). More...

	getAllAbandonedJobs ()
	Get an iterator to traverse over all abandoned jobs in this queue. More...

	getAllAcquiredJobs ()
	Get an iterator to traverse over all claimed jobs in this queue. More...

	getAllDelayedJobs ()
	Get an iterator to traverse over all delayed jobs in this queue. More...

	getAllQueuedJobs ()
	Get an iterator to traverse over all available jobs in this queue. More...

	getCoalesceLocationInternal ()
	Do not use this function outside of JobQueue/JobQueueGroup. More...

	getDelayedCount ()
	Get the number of delayed jobs (these are temporarily out of the queue). More...

	getOrder ()

	getReadOnlyReason ()

	getSiblingQueueSizes (array $types)
	Check the size of each of the given queues. More...

	getSiblingQueuesWithJobs (array $types)
	Check whether each of the given queues are empty. More...

	getSize ()
	Get the number of available (unacquired, non-delayed) jobs in the queue. More...

	getType ()

	getWiki ()

	isEmpty ()
	Quickly check if the queue has no available (unacquired, non-delayed) jobs. More...

	pop ()
	Pop a job off of the queue. More...

	push ($jobs, $flags=0)
	Push one or more jobs into the queue. More...

	waitForBackups ()
	Wait for any slaves or backup servers to catch up. More...

Protected Member Functions
	doAck (Job $job)

	doBatchPush (array $jobs, $flags)

	doDeduplicateRootJob (IJobSpecification $job)

	doDelete ()

	doGetAbandonedCount ()

	doGetAcquiredCount ()

	doGetDelayedCount ()

	doGetSiblingQueueSizes (array $types)

	doGetSiblingQueuesWithJobs (array $types)

	doGetSize ()

	doIsEmpty ()

	doIsRootJobOldDuplicate (Job $job)

	doPop ()

	getConnection ()
	Get a connection to the server that handles all sub-queues for this queue. More...

	getJobFromFields (array $fields)

	getJobIterator (RedisConnRef $conn, array $uids)

	getNewJobFields (IJobSpecification $job)

	optimalOrder ()

	popAndAcquireBlob (RedisConnRef $conn)

	pushBlobs (RedisConnRef $conn, array $items)

	serialize (array $fields)

	supportedOrders ()

	supportsDelayedJobs ()

	throwRedisException (RedisConnRef $conn, $e)

	unserialize ($blob)

Protected Member Functions inherited from JobQueue
	__construct (array $params)

	assertNotReadOnly ()

	doAck (Job $job)

	doBatchPush (array $jobs, $flags)

	doDeduplicateRootJob (IJobSpecification $job)

	doDelete ()

	doFlushCaches ()

	doGetAbandonedCount ()

	doGetAcquiredCount ()

	doGetDelayedCount ()

	doGetSiblingQueueSizes (array $types)

	doGetSiblingQueuesWithJobs (array $types)

	doGetSize ()

	doIsEmpty ()

	doIsRootJobOldDuplicate (Job $job)

	doPop ()

	doWaitForBackups ()

	getRootJobCacheKey ($signature)

	isRootJobOldDuplicate (Job $job)
	Check if the "root" job of a given job has been superseded by a newer one. More...

	optimalOrder ()
	Get the default queue order to use if configuration does not specify one. More...

	supportedOrders ()
	Get the allowed queue orders for configuration validation. More...

	supportsDelayedJobs ()
	Find out if delayed jobs are supported for configuration validation. More...

Protected Attributes
string	$compression
	Compression method to use. More...

RedisConnectionPool	$redisPool

string	$server
	Server address. More...

Protected Attributes inherited from JobQueue
JobQueueAggregator	$aggr

int	$claimTTL
	Time to live in seconds. More...

BagOStuff	$dupCache

int	$maxTries
	Maximum number of times to try a job. More...

string	$order
	Job priority for pop() More...

string bool	$readOnlyReason
	Read only rationale (or false if r/w) More...

string	$type
	Job type. More...

string	$wiki
	Wiki ID. More...

Private Member Functions
	decodeQueueName ($name)

	encodeQueueName ()

	getGlobalKey ($name)

	getQueueKey ($prop, $type=null)

Additional Inherited Members
Static Public Member Functions inherited from JobQueue
static	factory (array $params)
	Get a job queue object of the specified type. More...

static	incrStats ($key, $type, $delta=1)
	Call wfIncrStats() for the queue overall and for the queue type. More...

Public Attributes inherited from JobQueue
const	QOS_ATOMIC = 1

const	ROOTJOB_TTL = 2419200

Detailed Description

Class to handle job queues stored in Redis.

This is a faster and less resource-intensive job queue than JobQueueDB. All data for a queue using this class is placed into one redis server. The mediawiki/services/jobrunner background service must be set up and running.

There are eight main redis keys (per queue) used to track jobs:

l-unclaimed : A list of job IDs used for ready unclaimed jobs
z-claimed : A sorted set of (job ID, UNIX timestamp as score) used for job retries
z-abandoned : A sorted set of (job ID, UNIX timestamp as score) used for broken jobs
z-delayed : A sorted set of (job ID, UNIX timestamp as score) used for delayed jobs
h-idBySha1 : A hash of (SHA1 => job ID) for unclaimed jobs used for de-duplication
h-sha1ById : A hash of (job ID => SHA1) for unclaimed jobs used for de-duplication
h-attempts : A hash of (job ID => attempt count) used for job claiming/retries
h-data : A hash of (job ID => serialized blobs) for job storage A job ID can be in only one of z-delayed, l-unclaimed, z-claimed, and z-abandoned. If an ID appears in any of those lists, it should have a h-data entry for its ID. If a job has a SHA1 de-duplication value and its ID is in l-unclaimed or z-delayed, then there should be no other such jobs with that SHA1. Every h-idBySha1 entry has an h-sha1ById entry and every h-sha1ById must refer to an ID that is l-unclaimed. If a job has its ID in z-claimed or z-abandoned, then it must also have an h-attempts entry for its ID.

The following keys are used to track queue states:

s-queuesWithJobs : A set of all queues with non-abandoned jobs

The background service takes care of undelaying, recycling, and pruning jobs as well as removing s-queuesWithJobs entries as queues empty.

Additionally, "rootjob:* keys track "root jobs" used for additional de-duplication. Aside from root job keys, all keys have no expiry, and are only removed when jobs are run. All the keys are prefixed with the relevant wiki ID information.

This class requires Redis 2.6 as it makes use Lua scripts for fast atomic operations. Additionally, it should be noted that redis has different persistence modes, such as rdb snapshots, journaling, and no persistence. Appropriate configuration should be made on the servers based on what queues are using it and what tolerance they have.

Since: 1.22

Definition at line 66 of file JobQueueRedis.php.

Constructor & Destructor Documentation

JobQueueRedis::__construct ( array $params )

Parameters

array

$params

Possible keys:

redisConfig : An array of parameters to RedisConnectionPool::__construct(). Note that the serializer option is ignored as "none" is always used.
redisServer : A hostname/port combination or the absolute path of a UNIX socket. If a hostname is specified but no port, the standard port number 6379 will be used. Required.
compression : The type of compression to use; one of (none,gzip).
daemonized : Set to true if the redisJobRunnerService runs in the background. This will disable job recycling/undelaying from the MediaWiki side to avoid redundance and out-of-sync configuration.

Exceptions

InvalidArgumentException

Definition at line 88 of file JobQueueRedis.php.

References server, and RedisConnectionPool\singleton().

Member Function Documentation

JobQueueRedis::decodeQueueName ( $name )

private

Parameters

string $name JSON

Returns: array (type, wiki)

Definition at line 778 of file JobQueueRedis.php.

References $name.

Referenced by getServerQueuesWithJobs().

JobQueueRedis::doAck ( Job $job )

protected

See Also: JobQueue::doAck()

Parameters

Job $job

Returns: Job|bool

Exceptions

UnexpectedValueException
JobQueueError

Definition at line 380 of file JobQueueRedis.php.

References $e, $res, are, as, data, getConnection(), getQueueKey(), JobQueue\incrStats(), of, that, the, then, throwRedisException(), type, and wfDebugLog().

JobQueueRedis::doBatchPush	(	array	$jobs,
			$flags
	)

protected

See Also: JobQueue::doBatchPush()

Parameters

	IJobSpecification[]	$jobs
int	$flags

Returns: void

Exceptions

JobQueueError

Definition at line 189 of file JobQueueRedis.php.

References $e, $flags, $job, as, getConnection(), getNewJobFields(), JobQueue\incrStats(), pushBlobs(), throwRedisException(), type, and wfDebugLog().

JobQueueRedis::doDeduplicateRootJob ( IJobSpecification $job )

protected

See Also: JobQueue::doDeduplicateRootJob()

Parameters

IJobSpecification $job

Returns: bool

Exceptions

JobQueueError
LogicException

Definition at line 434 of file JobQueueRedis.php.

References $e, $params, $timestamp, getConnection(), JobQueue\getRootJobCacheKey(), IJobSpecification\getRootJobParams(), IJobSpecification\hasRootJobParams(), and throwRedisException().

JobQueueRedis::doDelete ( )

protected

See Also: JobQueue::doDelete()

Returns: bool

Exceptions

JobQueueError

Definition at line 486 of file JobQueueRedis.php.

References $e, $keys, as, encodeQueueName(), false, getConnection(), getGlobalKey(), getQueueKey(), and throwRedisException().

JobQueueRedis::doGetAbandonedCount ( )

protected

See Also: JobQueue::doGetAbandonedCount()

Returns: int

Exceptions

JobQueueError

Definition at line 173 of file JobQueueRedis.php.

References $e, getConnection(), getQueueKey(), and throwRedisException().

JobQueueRedis::doGetAcquiredCount ( )

protected

See Also: JobQueue::doGetAcquiredCount()

Returns: int

Exceptions

JobQueueError

Definition at line 141 of file JobQueueRedis.php.

References $e, getConnection(), getQueueKey(), and throwRedisException().

JobQueueRedis::doGetDelayedCount ( )

protected

See Also: JobQueue::doGetDelayedCount()

Returns: int

Exceptions

JobQueueError

Definition at line 159 of file JobQueueRedis.php.

References $e, getConnection(), getQueueKey(), and throwRedisException().

JobQueueRedis::doGetSiblingQueueSizes ( array $types )

protected

Definition at line 595 of file JobQueueRedis.php.

References $e, $res, JobQueue\$type, as, getConnection(), getQueueKey(), and throwRedisException().

Referenced by doGetSiblingQueuesWithJobs().

JobQueueRedis::doGetSiblingQueuesWithJobs ( array $types )

protected

Definition at line 591 of file JobQueueRedis.php.

References doGetSiblingQueueSizes().

JobQueueRedis::doGetSize ( )

protected

See Also: JobQueue::doGetSize()

Returns: int

Exceptions

JobQueueError

Definition at line 127 of file JobQueueRedis.php.

References $e, getConnection(), getQueueKey(), and throwRedisException().

Referenced by doIsEmpty().

JobQueueRedis::doIsEmpty ( )

protected

See Also: JobQueue::doIsEmpty()

Returns: bool

Exceptions

JobQueueError

Definition at line 118 of file JobQueueRedis.php.

References doGetSize().

JobQueueRedis::doIsRootJobOldDuplicate ( Job $job )

protected

See Also: JobQueue::doIsRootJobOldDuplicate()

Parameters

Job $job

Returns: bool

Exceptions

JobQueueError

Definition at line 462 of file JobQueueRedis.php.

References $e, $params, $timestamp, getConnection(), JobQueue\getRootJobCacheKey(), Job\getRootJobParams(), Job\hasRootJobParams(), and throwRedisException().

JobQueueRedis::doPop ( )

protected

See Also: JobQueue::doPop()

Returns: Job|bool

Exceptions

JobQueueError

Definition at line 307 of file JobQueueRedis.php.

References $blob, $e, $job, getConnection(), getJobFromFields(), JobQueue\incrStats(), popAndAcquireBlob(), throwRedisException(), type, unserialize(), and wfDebugLog().

JobQueueRedis::encodeQueueName ( )

private

Returns: string JSON

Definition at line 770 of file JobQueueRedis.php.

References type, and wiki.

Referenced by doDelete(), and pushBlobs().

JobQueueRedis::getAllAbandonedJobs ( )

See Also: JobQueue::getAllAbandonedJobs()

Returns: Iterator

Exceptions

JobQueueError

Definition at line 559 of file JobQueueRedis.php.

References $e, getConnection(), getJobIterator(), getQueueKey(), and throwRedisException().

JobQueueRedis::getAllAcquiredJobs ( )

See Also: JobQueue::getAllAcquiredJobs()

Returns: Iterator

Exceptions

JobQueueError

Definition at line 543 of file JobQueueRedis.php.

References $e, getConnection(), getJobIterator(), getQueueKey(), and throwRedisException().

JobQueueRedis::getAllDelayedJobs ( )

See Also: JobQueue::getAllDelayedJobs()

Returns: Iterator

Exceptions

JobQueueError

Definition at line 527 of file JobQueueRedis.php.

References $e, getConnection(), getJobIterator(), getQueueKey(), and throwRedisException().

JobQueueRedis::getAllQueuedJobs ( )

See Also: JobQueue::getAllQueuedJobs()

Returns: Iterator

Exceptions

JobQueueError

Definition at line 511 of file JobQueueRedis.php.

References $e, getConnection(), getJobIterator(), getQueueKey(), and throwRedisException().

JobQueueRedis::getCoalesceLocationInternal ( )

Definition at line 587 of file JobQueueRedis.php.

References $server.

JobQueueRedis::getConnection ( )

protected

Get a connection to the server that handles all sub-queues for this queue.

Returns: RedisConnRef

Exceptions

JobQueueConnectionError

Definition at line 747 of file JobQueueRedis.php.

References server.

Referenced by doAck(), doBatchPush(), doDeduplicateRootJob(), doDelete(), doGetAbandonedCount(), doGetAcquiredCount(), doGetDelayedCount(), doGetSiblingQueueSizes(), doGetSize(), doIsRootJobOldDuplicate(), doPop(), getAllAbandonedJobs(), getAllAcquiredJobs(), getAllDelayedJobs(), getAllQueuedJobs(), and getServerQueuesWithJobs().

JobQueueRedis::getGlobalKey ( $name )

private

Parameters

string $name

Returns: string

Definition at line 786 of file JobQueueRedis.php.

References $name, and as.

Referenced by doDelete(), getServerQueuesWithJobs(), and pushBlobs().

JobQueueRedis::getJobFromFields ( array $fields )

protected

Parameters

array $fields

Returns: Job|bool

Definition at line 696 of file JobQueueRedis.php.

References $job, $title, Job\factory(), and Title\makeTitle().

Referenced by doPop().

JobQueueRedis::getJobFromUidInternal	(		$uid,
		RedisConnRef	$conn
	)

This function should not be called outside JobQueueRedis.

Parameters

string	$uid
RedisConnRef	$conn

Returns: Job|bool Returns false if the job does not exist

Exceptions

JobQueueError
UnexpectedValueException

Definition at line 626 of file JobQueueRedis.php.

References $e, $job, $title, Job\factory(), getQueueKey(), Title\makeTitle(), throwRedisException(), and unserialize().

Referenced by getJobIterator().

JobQueueRedis::getJobIterator	(	RedisConnRef	$conn,
		array	$uids
	)

protected

Parameters

RedisConnRef	$conn
array	$uids	List of job UUIDs

Returns: MappedIterator

Definition at line 575 of file JobQueueRedis.php.

References $job, getJobFromUidInternal(), and use.

Referenced by getAllAbandonedJobs(), getAllAcquiredJobs(), getAllDelayedJobs(), and getAllQueuedJobs().

JobQueueRedis::getNewJobFields ( IJobSpecification $job )

protected

Parameters

IJobSpecification $job

Returns: array

Definition at line 674 of file JobQueueRedis.php.

References IJobSpecification\getDeduplicationInfo(), IJobSpecification\getParams(), IJobSpecification\getReleaseTimestamp(), IJobSpecification\getTitle(), IJobSpecification\getType(), IJobSpecification\ignoreDuplicates(), UIDGenerator\newRawUUIDv4(), UIDGenerator\QUICK_RAND, and serialize().

Referenced by doBatchPush().

JobQueueRedis::getQueueKey	(	$prop,
		$type = `null`
	)

private

Parameters

string	$prop
string \| null	$type	Override this for sibling queues

Returns: string

Definition at line 802 of file JobQueueRedis.php.

References JobQueue\$type, list, wfSplitWikiID(), and wiki.

Referenced by doAck(), doDelete(), doGetAbandonedCount(), doGetAcquiredCount(), doGetDelayedCount(), doGetSiblingQueueSizes(), doGetSize(), getAllAbandonedJobs(), getAllAcquiredJobs(), getAllDelayedJobs(), getAllQueuedJobs(), getJobFromUidInternal(), popAndAcquireBlob(), and pushBlobs().

JobQueueRedis::getServerQueuesWithJobs ( )

Returns: array List of (wiki,type) tuples for queues with non-abandoned jobs

Exceptions

JobQueueConnectionError
JobQueueError

Definition at line 654 of file JobQueueRedis.php.

References $e, $queue, as, decodeQueueName(), getConnection(), getGlobalKey(), and throwRedisException().

JobQueueRedis::optimalOrder ( )

protected

Definition at line 105 of file JobQueueRedis.php.

JobQueueRedis::popAndAcquireBlob ( RedisConnRef $conn )

protected

Parameters

RedisConnRef $conn

Returns: array Serialized string or false

Exceptions

RedisException

Definition at line 340 of file JobQueueRedis.php.

References and(), are, as, getQueueKey(), RedisConnRef\luaEval(), of, that, the, and then.

Referenced by doPop().

JobQueueRedis::pushBlobs	(	RedisConnRef	$conn,
		array	$items
	)

protected

Parameters

RedisConnRef	$conn
array	$items	List of results from JobQueueRedis::getNewJobFields()

Returns: int Number of jobs inserted (duplicates are ignored)

Exceptions

RedisException

Definition at line 243 of file JobQueueRedis.php.

References $args, are, as, encodeQueueName(), First, getGlobalKey(), getQueueKey(), id(), in, is, RedisConnRef\luaEval(), needed, of, or, release, serialize(), string, that, the, and then.

Referenced by doBatchPush().

JobQueueRedis::serialize ( array $fields )

protected

Parameters

array $fields

Returns: string Serialized and possibly compressed version of $fields

Definition at line 709 of file JobQueueRedis.php.

References $blob, and object.

Referenced by getNewJobFields(), and pushBlobs().

JobQueueRedis::supportedOrders ( )

protected

Definition at line 101 of file JobQueueRedis.php.

JobQueueRedis::supportsDelayedJobs ( )

protected

Definition at line 109 of file JobQueueRedis.php.

JobQueueRedis::throwRedisException	(	RedisConnRef	$conn,
			$e
	)

protected

Parameters

RedisConnRef	$conn
RedisException	$e

Exceptions

JobQueueError

Definition at line 762 of file JobQueueRedis.php.

References $e.

Referenced by doAck(), doBatchPush(), doDeduplicateRootJob(), doDelete(), doGetAbandonedCount(), doGetAcquiredCount(), doGetDelayedCount(), doGetSiblingQueueSizes(), doGetSize(), doIsRootJobOldDuplicate(), doPop(), getAllAbandonedJobs(), getAllAcquiredJobs(), getAllDelayedJobs(), getAllQueuedJobs(), getJobFromUidInternal(), and getServerQueuesWithJobs().

JobQueueRedis::unserialize ( $blob )

protected

Parameters

string $blob

Returns: array|bool Unserialized version of $blob or false

Definition at line 728 of file JobQueueRedis.php.

References $blob.

Referenced by doPop(), and getJobFromUidInternal().

Member Data Documentation

string JobQueueRedis::$compression

protected

Compression method to use.

Definition at line 73 of file JobQueueRedis.php.

RedisConnectionPool JobQueueRedis::$redisPool

protected

Definition at line 68 of file JobQueueRedis.php.

string JobQueueRedis::$server

protected

Server address.

Definition at line 71 of file JobQueueRedis.php.

Referenced by getCoalesceLocationInternal().

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

includes/jobqueue/JobQueueRedis.php

Public Member Functions

Protected Member Functions

Protected Attributes

Private Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation