PoolCounterWork Class Reference

Class for dealing with PoolCounters using class members. More...

Inheritance diagram for PoolCounterWork:

Collaboration diagram for PoolCounterWork:

Public Member Functions
	__construct ( $type, $key)
	doWork ()
	Actually perform the work, caching it if needed.
	error ( $status)
	Do something with the error, like showing it to the user.
	execute ( $skipcache=false)
	Get the result of the work (whatever it is), or the result of the error() function.
	fallback ()
	A work not so good (eg.
	getCachedWork ()
	Retrieve the work from cache.
	logError ( $status)
	Log an error.

Protected Attributes
bool	$cacheable = false
string	$type = 'generic'

Private Attributes
PoolCounter	$poolCounter

Detailed Description

Class for dealing with PoolCounters using class members.

Definition at line 27 of file PoolCounterWork.php.

Constructor & Destructor Documentation

__construct()

PoolCounterWork::__construct	(		$type,
			$key )

Parameters

string	$type	The class of actions to limit concurrency for (task type)
string	$key	Key that identifies the queue this work is placed on

Definition at line 39 of file PoolCounterWork.php.

References $type, and PoolCounter\factory().

Member Function Documentation

doWork()

PoolCounterWork::doWork ( )

abstract

Actually perform the work, caching it if needed.

Returns

mixed Work result or false

Reimplemented in PoolCounterWorkViaCallback, and PoolWorkArticleView.

Referenced by execute().

error()

PoolCounterWork::error

(

$status

)

Do something with the error, like showing it to the user.

Parameters

Status

$status

Returns

bool

Reimplemented in PoolCounterWorkViaCallback, and PoolWorkArticleView.

Definition at line 74 of file PoolCounterWork.php.

Referenced by execute().

execute()

PoolCounterWork::execute

(

$skipcache = false

)

Get the result of the work (whatever it is), or the result of the error() function.

This returns the result of the first applicable method that returns a non-false value, where the methods are checked in the following order:

• a) doWork() : Applies if the work is exclusive or no another process is doing it, and on the condition that either this process successfully entered the pool or the pool counter is down.
• b) doCachedWork() : Applies if the work is cacheable and this blocked on another process which finished the work.
• c) fallback() : Applies for all remaining cases. If these all fall through (by returning false), then the result of error() is returned.

Parameters

bool

$skipcache

Returns

mixed

Definition at line 106 of file PoolCounterWork.php.

References PoolCounter\DONE, doWork(), PoolCounter\ERROR, error(), execute(), fallback(), getCachedWork(), PoolCounter\LOCK_HELD, PoolCounter\LOCKED, logError(), PoolCounter\QUEUE_FULL, and PoolCounter\TIMEOUT.

Referenced by PdfHandler\doTransform(), DjVuHandler\doTransform(), SpecialContributions\execute(), execute(), PdfHandler\getMetaArray(), File\getThumbnailSource(), and wfGenerateThumbnail().

fallback()

PoolCounterWork::fallback

(

)

A work not so good (eg.

expired one) but better than an error message.

Returns

mixed Work result or false

Reimplemented in PoolCounterWorkViaCallback, and PoolWorkArticleView.

Definition at line 63 of file PoolCounterWork.php.

Referenced by execute().

getCachedWork()

PoolCounterWork::getCachedWork

(

)

Retrieve the work from cache.

Returns

mixed Work result or false

Reimplemented in PoolCounterWorkViaCallback, and PoolWorkArticleView.

Definition at line 54 of file PoolCounterWork.php.

Referenced by execute().

logError()

PoolCounterWork::logError

(

$status

)

Log an error.

Parameters

Status

$status

Returns

void

Definition at line 84 of file PoolCounterWork.php.

References wfDebugLog().

Referenced by execute().

Member Data Documentation

$cacheable

bool PoolCounterWork::$cacheable = false

protected

Definition at line 31 of file PoolCounterWork.php.

$poolCounter

PoolCounter PoolCounterWork::$poolCounter

private

Definition at line 33 of file PoolCounterWork.php.

$type

string PoolCounterWork::$type = 'generic'

protected

Definition at line 29 of file PoolCounterWork.php.

Referenced by __construct(), and PoolCounterWorkViaCallback\__construct().

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

• includes/poolcounter/PoolCounterWork.php