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JobQueueDB Class Reference

Class to handle job queues stored in the DB. More...

Inheritance diagram for JobQueueDB:
Collaboration diagram for JobQueueDB:

Public Member Functions

 doBatchPushInternal (IDatabase $dbw, array $jobs, $flags, $method)
 This function should not be called outside of JobQueueDB. More...
 
 getAllAcquiredJobs ()
 
 getAllQueuedJobs ()
 
 getCoalesceLocationInternal ()
 
 recycleAndDeleteStaleJobs ()
 Recycle or destroy any jobs that have been claimed for too long. More...
 
- Public Member Functions inherited from JobQueue
 ack (RunnableJob $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...
 
 getDomain ()
 
 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 replica DBs or backup servers to catch up. More...
 

Static Public Member Functions

static selectFields ()
 Return the list of job fields that should be selected. More...
 
- Static Public Member Functions inherited from JobQueue
static factory (array $params)
 Get a job queue object of the specified type. More...
 

Public Attributes

const CACHE_TTL_SHORT = 30
 
const MAX_AGE_PRUNE = 604800
 
const MAX_JOB_RANDOM = 2147483647
 
const MAX_OFFSET = 255
 
- Public Attributes inherited from JobQueue
const QOS_ATOMIC = 1
 
const ROOTJOB_TTL = 2419200
 

Protected Member Functions

 __construct (array $params)
 Additional parameters include: More...
 
 claimOldest ( $uuid)
 Reserve a row with a single UPDATE without holding row locks over RTTs... More...
 
 claimRandom ( $uuid, $rand, $gte)
 Reserve a row with a single UPDATE without holding row locks over RTTs... More...
 
 doAck (RunnableJob $job)
 
 doBatchPush (array $jobs, $flags)
 
 doDeduplicateRootJob (IJobSpecification $job)
 
 doDelete ()
 
 doFlushCaches ()
 
 doGetAbandonedCount ()
 
 doGetAcquiredCount ()
 
 doGetSiblingQueueSizes (array $types)
 
 doGetSiblingQueuesWithJobs (array $types)
 
 doGetSize ()
 
 doIsEmpty ()
 
 doPop ()
 
 doWaitForBackups ()
 
 getDB ( $index)
 
 getDBException (DBError $e)
 
 getJobIterator (array $conds)
 
 getMasterDB ()
 
 getReplicaDB ()
 
 insertFields (IJobSpecification $job, IDatabase $db)
 
 jobFromRow ( $row)
 
 optimalOrder ()
 
 supportedOrders ()
 
- Protected Member Functions inherited from JobQueue
 __construct (array $params)
 
 assertNotReadOnly ()
 
 doAck (RunnableJob $job)
 
 doBatchPush (array $jobs, $flags)
 
 doDeduplicateRootJob (IJobSpecification $job)
 
 doDelete ()
 
 doFlushCaches ()
 
 doGetAbandonedCount ()
 
 doGetAcquiredCount ()
 
 doGetDelayedCount ()
 
 doGetSiblingQueueSizes (array $types)
 
 doGetSiblingQueuesWithJobs (array $types)
 
 doGetSize ()
 
 doIsEmpty ()
 
 doIsRootJobOldDuplicate (IJobSpecification $job)
 
 doPop ()
 
 doWaitForBackups ()
 
 factoryJob ( $command, $params)
 
 getRootJobCacheKey ( $signature)
 
 incrStats ( $key, $type, $delta=1)
 Call wfIncrStats() for the queue overall and for the queue type. More...
 
 isRootJobOldDuplicate (IJobSpecification $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...
 

Static Protected Member Functions

static makeBlob ( $params)
 

Protected Attributes

string null $cluster
 Name of an external DB cluster or null for the local DB cluster. More...
 
IMaintainableDatabase DBError null $conn
 
array null $server
 Server configuration array. More...
 
- Protected Attributes inherited from JobQueue
int $claimTTL
 Time to live in seconds. More...
 
string $domain
 DB domain ID. More...
 
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...
 
StatsdDataFactoryInterface $stats
 
string $type
 Job type. More...
 
WANObjectCache $wanCache
 

Private Member Functions

 getCacheKey ( $property)
 
 getScopedNoTrxFlag (IDatabase $db)
 

Detailed Description

Class to handle job queues stored in the DB.

Since
1.21

Definition at line 36 of file JobQueueDB.php.

Constructor & Destructor Documentation

◆ __construct()

JobQueueDB::__construct ( array  $params)
protected

Additional parameters include:

  • server : Server configuration array for Database::factory. Overrides "cluster".
  • cluster : The name of an external cluster registered via LBFactory. If not specified, the primary DB cluster for the wiki will be used. This can be overridden with a custom cluster so that DB handles will be retrieved via LBFactory::getExternalLB() and getConnection().
    Parameters
    array$params

Definition at line 59 of file JobQueueDB.php.

References server.

Member Function Documentation

◆ claimOldest()

JobQueueDB::claimOldest (   $uuid)
protected

Reserve a row with a single UPDATE without holding row locks over RTTs...

Parameters
string$uuid32 char hex string
Returns
stdClass|bool Row|false

Definition at line 417 of file JobQueueDB.php.

References getMasterDB(), getScopedNoTrxFlag(), type, and wfDebug().

Referenced by doPop().

◆ claimRandom()

JobQueueDB::claimRandom (   $uuid,
  $rand,
  $gte 
)
protected

Reserve a row with a single UPDATE without holding row locks over RTTs...

Parameters
string$uuid32 char hex string
int$randRandom unsigned integer (31 bits)
bool$gteSearch for job_random >= $random (otherwise job_random <= $random)
Returns
stdClass|bool Row|false

Definition at line 339 of file JobQueueDB.php.

References JobQueue\$type, getCacheKey(), getMasterDB(), getScopedNoTrxFlag(), and type.

Referenced by doPop().

◆ doAck()

JobQueueDB::doAck ( RunnableJob  $job)
protected

◆ doBatchPush()

JobQueueDB::doBatchPush ( array  $jobs,
  $flags 
)
protected
See also
JobQueue::doBatchPush()
Parameters
IJobSpecification[]$jobs
int$flags
Exceptions
DBError|Exception
Returns
void

Definition at line 201 of file JobQueueDB.php.

References $fname, doBatchPushInternal(), getMasterDB(), getScopedNoTrxFlag(), and use.

◆ doBatchPushInternal()

JobQueueDB::doBatchPushInternal ( IDatabase  $dbw,
array  $jobs,
  $flags,
  $method 
)

This function should not be called outside of JobQueueDB.

SecurityCheck-SQLInjection Bug in phan-taint-check handling bulk inserts

Parameters
IDatabase$dbw
IJobSpecification[]$jobs
int$flags
string$method
Exceptions
DBError
Returns
void

Definition at line 234 of file JobQueueDB.php.

References $e, $job, $res, $rows, as, Wikimedia\Rdbms\IDatabase\endAtomic(), getDBException(), JobQueue\incrStats(), Wikimedia\Rdbms\IDatabase\insert(), insertFields(), Wikimedia\Rdbms\IDatabase\select(), Wikimedia\Rdbms\IDatabase\startAtomic(), type, and wfDebug().

Referenced by doBatchPush().

◆ doDeduplicateRootJob()

JobQueueDB::doDeduplicateRootJob ( IJobSpecification  $job)
protected
See also
JobQueue::doDeduplicateRootJob()
Parameters
IJobSpecification$job
Exceptions
MWException
Returns
bool

Definition at line 508 of file JobQueueDB.php.

References getMasterDB(), getScopedNoTrxFlag(), and use.

◆ doDelete()

JobQueueDB::doDelete ( )
protected
See also
JobQueue::doDelete()
Returns
bool

Definition at line 531 of file JobQueueDB.php.

References $e, getDBException(), getMasterDB(), getScopedNoTrxFlag(), and type.

◆ doFlushCaches()

JobQueueDB::doFlushCaches ( )
protected
Returns
void

Definition at line 563 of file JobQueueDB.php.

References JobQueue\$type, as, and getCacheKey().

◆ doGetAbandonedCount()

JobQueueDB::doGetAbandonedCount ( )
protected
See also
JobQueue::doGetAbandonedCount()
Returns
int
Exceptions
MWException

Definition at line 161 of file JobQueueDB.php.

References $dbr, $e, getCacheKey(), getDBException(), getReplicaDB(), and getScopedNoTrxFlag().

◆ doGetAcquiredCount()

JobQueueDB::doGetAcquiredCount ( )
protected
See also
JobQueue::doGetAcquiredCount()
Returns
int

Definition at line 128 of file JobQueueDB.php.

References $dbr, $e, getCacheKey(), getDBException(), getReplicaDB(), and getScopedNoTrxFlag().

◆ doGetSiblingQueueSizes()

JobQueueDB::doGetSiblingQueueSizes ( array  $types)
protected

Definition at line 634 of file JobQueueDB.php.

References $dbr, $res, as, getReplicaDB(), and getScopedNoTrxFlag().

◆ doGetSiblingQueuesWithJobs()

JobQueueDB::doGetSiblingQueuesWithJobs ( array  $types)
protected

Definition at line 615 of file JobQueueDB.php.

References $dbr, $res, as, getReplicaDB(), and getScopedNoTrxFlag().

◆ doGetSize()

JobQueueDB::doGetSize ( )
protected
See also
JobQueue::doGetSize()
Returns
int

Definition at line 100 of file JobQueueDB.php.

References $dbr, $e, getCacheKey(), getDBException(), getReplicaDB(), and getScopedNoTrxFlag().

◆ doIsEmpty()

JobQueueDB::doIsEmpty ( )
protected
See also
JobQueue::doIsEmpty()
Returns
bool

Definition at line 81 of file JobQueueDB.php.

References $dbr, $e, getDBException(), getReplicaDB(), getScopedNoTrxFlag(), and type.

◆ doPop()

JobQueueDB::doPop ( )
protected

◆ doWaitForBackups()

JobQueueDB::doWaitForBackups ( )
protected
See also
JobQueue::doWaitForBackups()
Returns
void

Definition at line 548 of file JobQueueDB.php.

References server.

◆ getAllAcquiredJobs()

JobQueueDB::getAllAcquiredJobs ( )
See also
JobQueue::getAllAcquiredJobs()
Returns
Iterator

Definition at line 581 of file JobQueueDB.php.

References getJobIterator(), and JobQueue\getType().

◆ getAllQueuedJobs()

JobQueueDB::getAllQueuedJobs ( )
See also
JobQueue::getAllQueuedJobs()
Returns
Iterator

Definition at line 573 of file JobQueueDB.php.

References getJobIterator(), and JobQueue\getType().

◆ getCacheKey()

JobQueueDB::getCacheKey (   $property)
private
Parameters
string$property
Returns
string

Definition at line 841 of file JobQueueDB.php.

References $property, and type.

Referenced by claimRandom(), doFlushCaches(), doGetAbandonedCount(), doGetAcquiredCount(), and doGetSize().

◆ getCoalesceLocationInternal()

JobQueueDB::getCoalesceLocationInternal ( )

Definition at line 605 of file JobQueueDB.php.

References null, and server.

◆ getDB()

JobQueueDB::getDB (   $index)
protected
Parameters
int$index(DB_REPLICA/DB_MASTER)
Returns
IMaintainableDatabase

Definition at line 787 of file JobQueueDB.php.

References $conn, $e, and server.

Referenced by getMasterDB(), and getReplicaDB().

◆ getDBException()

JobQueueDB::getDBException ( DBError  $e)
protected

◆ getJobIterator()

JobQueueDB::getJobIterator ( array  $conds)
protected
Parameters
array$condsQuery conditions
Returns
Iterator

Definition at line 589 of file JobQueueDB.php.

References $dbr, $e, getDBException(), getReplicaDB(), getScopedNoTrxFlag(), and jobFromRow().

Referenced by getAllAcquiredJobs(), and getAllQueuedJobs().

◆ getMasterDB()

JobQueueDB::getMasterDB ( )
protected
Exceptions
JobQueueConnectionError
Returns
IMaintainableDatabase

Definition at line 775 of file JobQueueDB.php.

References $e, DB_MASTER, and getDB().

Referenced by claimOldest(), claimRandom(), doAck(), doBatchPush(), doDeduplicateRootJob(), doDelete(), doPop(), and recycleAndDeleteStaleJobs().

◆ getReplicaDB()

JobQueueDB::getReplicaDB ( )
protected

◆ getScopedNoTrxFlag()

◆ insertFields()

JobQueueDB::insertFields ( IJobSpecification  $job,
IDatabase  $db 
)
protected

◆ jobFromRow()

JobQueueDB::jobFromRow (   $row)
protected
Parameters
stdClass$row
Returns
RunnableJob|null

Definition at line 869 of file JobQueueDB.php.

References $job, $params, JobQueue\factoryJob(), string, and unserialize().

Referenced by doPop(), and getJobIterator().

◆ makeBlob()

static JobQueueDB::makeBlob (   $params)
staticprotected
Parameters
array | bool$params
Returns
string

Definition at line 857 of file JobQueueDB.php.

References $params, and serialize().

◆ optimalOrder()

JobQueueDB::optimalOrder ( )
protected

Definition at line 73 of file JobQueueDB.php.

◆ recycleAndDeleteStaleJobs()

JobQueueDB::recycleAndDeleteStaleJobs ( )

Recycle or destroy any jobs that have been claimed for too long.

Returns
int Number of jobs recycled/deleted

Definition at line 655 of file JobQueueDB.php.

References $e, $res, JobQueue\$type, getDBException(), getMasterDB(), getScopedNoTrxFlag(), JobQueue\incrStats(), and type.

Referenced by doPop().

◆ selectFields()

static JobQueueDB::selectFields ( )
static

Return the list of job fields that should be selected.

Since
1.23
Returns
array

Definition at line 897 of file JobQueueDB.php.

◆ supportedOrders()

JobQueueDB::supportedOrders ( )
protected

Definition at line 69 of file JobQueueDB.php.

Member Data Documentation

◆ $cluster

string null JobQueueDB::$cluster
protected

Name of an external DB cluster or null for the local DB cluster.

Definition at line 48 of file JobQueueDB.php.

◆ $conn

IMaintainableDatabase DBError null JobQueueDB::$conn
protected

Definition at line 43 of file JobQueueDB.php.

Referenced by getDB().

◆ $server

array null JobQueueDB::$server
protected

Server configuration array.

Definition at line 46 of file JobQueueDB.php.

◆ CACHE_TTL_SHORT

const JobQueueDB::CACHE_TTL_SHORT = 30

Definition at line 37 of file JobQueueDB.php.

◆ MAX_AGE_PRUNE

const JobQueueDB::MAX_AGE_PRUNE = 604800

Definition at line 38 of file JobQueueDB.php.

◆ MAX_JOB_RANDOM

const JobQueueDB::MAX_JOB_RANDOM = 2147483647

Definition at line 39 of file JobQueueDB.php.

◆ MAX_OFFSET

const JobQueueDB::MAX_OFFSET = 255

Definition at line 40 of file JobQueueDB.php.


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