Class for fetching backlink lists, approximate backlink counts and partitions. More...

Collaboration diagram for BacklinkCache:

[legend]

Public Member Functions
	__construct (WANObjectCache $wanCache, PageReference $page)
	Create a new BacklinkCache.

	clear ()
	Clear locally stored data and database object.

	getCascadeProtectedLinkPages ()
	Get a PageIdentity iterator for cascade-protected template/file use backlinks.

	getCascadeProtectedLinks ()
	Get a Title iterator for cascade-protected template/file use backlinks.

	getLinkPages (string $table, $startId=false, $endId=false, $max=INF)
	Get the backlinks for a given table.

	getLinks ( $table, $startId=false, $endId=false, $max=INF)
	Get the backlinks for a given table.

	getNumLinks ( $table, $max=INF)
	Get the approximate number of backlinks.

	getPage ()

	hasLinks ( $table)
	Check if there are any backlinks.

	partition ( $table, $batchSize)
	Partition the backlinks into batches.

	setDB ( $db)
	Set the Database object to use.

Static Public Member Functions
static	get (PageReference $page)
	Create a new BacklinkCache or reuse any existing one.

Protected Member Functions
	getConditions ( $table)
	Get the SQL condition array for selecting backlinks, with a join on the page table.

	getDB ()
	Get the replica DB connection to the database When non existing, will initialize the connection.

	getPrefix ( $table)
	Get the field name prefix for a given table.

	partitionResult ( $res, $batchSize, $isComplete=true)
	Partition a DB result with backlinks in it into batches.

	queryLinks ( $table, $startId, $endId, $max, $select='all')
	Get the backlinks for a given table.

Protected Attributes
	$db
	Local copy of a database object.

IResultWrapper[]	$fullResultCache = []
	Contains the whole links from a database result.

PageReference	$page
	Local copy of a PageReference object.

array[]	$partitionCache = []
	Multi dimensions array representing batches.

WANObjectCache	$wanCache

Static Protected Attributes
static BacklinkCache	$instance

Detailed Description

Class for fetching backlink lists, approximate backlink counts and partitions.

This is a shared cache.

Instances of this class should typically be fetched with the method ::getBacklinkCache() from the BacklinkCacheFactory service.

Ideally you should only get your backlinks from here when you think there is some advantage in caching them. Otherwise, it's just a waste of memory.

Introduced by r47317

Definition at line 51 of file BacklinkCache.php.

Constructor & Destructor Documentation

◆ __construct()

BacklinkCache::__construct	(	WANObjectCache	$wanCache,
		PageReference	$page )

Create a new BacklinkCache.

Parameters

WANObjectCache	$wanCache
PageReference	$page	Page to create a backlink cache for

Definition at line 107 of file BacklinkCache.php.

Member Function Documentation

◆ clear()

BacklinkCache::clear ( )

Clear locally stored data and database object.

Invalidate data in memcache.

Definition at line 139 of file BacklinkCache.php.

◆ get()

static BacklinkCache::get ( PageReference $page )

static

Create a new BacklinkCache or reuse any existing one.

Currently, only one cache instance can exist; callers that need multiple backlink cache objects should keep them in scope.

Deprecated: since 1.37 Use BacklinkCacheFactory::getBacklinkCache() instead

Parameters

PageReference $page Page to get a backlink cache for

Returns: BacklinkCache

Definition at line 122 of file BacklinkCache.php.

◆ getCascadeProtectedLinkPages()

BacklinkCache::getCascadeProtectedLinkPages ( )

Get a PageIdentity iterator for cascade-protected template/file use backlinks.

Returns: Iterator Iterator of PageIdentity objects

Since: 1.37

Definition at line 558 of file BacklinkCache.php.

◆ getCascadeProtectedLinks()

BacklinkCache::getCascadeProtectedLinks ( )

Get a Title iterator for cascade-protected template/file use backlinks.

Deprecated: since 1.37, use getCascadeProtectedLinkPages()

Returns: TitleArray

Since: 1.25

Definition at line 574 of file BacklinkCache.php.

References TitleArray\newFromResult().

◆ getConditions()

BacklinkCache::getConditions ( $table )

protected

Get the SQL condition array for selecting backlinks, with a join on the page table.

Parameters

string $table

Exceptions

MWException

Returns: array

Definition at line 303 of file BacklinkCache.php.

References getDB(), and LIST_OR.

◆ getDB()

BacklinkCache::getDB ( )

protected

Get the replica DB connection to the database When non existing, will initialize the connection.

Returns: IDatabase

Definition at line 160 of file BacklinkCache.php.

References DB_REPLICA, and wfGetDB().

◆ getLinkPages()

BacklinkCache::getLinkPages	(	string	$table,
			$startId = false,
			$endId = false,
			$max = INF )

Get the backlinks for a given table.

Cached in process memory only.

Parameters

string	$table
int \| bool	$startId
int \| bool	$endId
int \| float	$max	Integer, or INF for no max

Returns: Iterator Iterator of PageIdentity objects

Since: 1.37

Definition at line 177 of file BacklinkCache.php.

◆ getLinks()

BacklinkCache::getLinks	(	$table,
		$startId = false,
		$endId = false,
		$max = INF )

Get the backlinks for a given table.

Cached in process memory only.

Deprecated: in 1.37, use getLinkPages()

Parameters

string	$table
int \| bool	$startId
int \| bool	$endId
int \| float	$max	Integer, or INF for no max

Returns: TitleArrayFromResult

Definition at line 198 of file BacklinkCache.php.

References TitleArray\newFromResult().

◆ getNumLinks()

BacklinkCache::getNumLinks	(		$table,
			$max = INF )

Get the approximate number of backlinks.

Parameters

string	$table
int \| float	$max	Only count up to this many backlinks, or INF for no max

Returns: int

Definition at line 368 of file BacklinkCache.php.

◆ getPage()

BacklinkCache::getPage ( )

Since: 1.37

Returns: PageReference

Definition at line 132 of file BacklinkCache.php.

◆ getPrefix()

BacklinkCache::getPrefix ( $table )

protected

Get the field name prefix for a given table.

Parameters

string $table

Exceptions

MWException

Returns: null|string

Definition at line 273 of file BacklinkCache.php.

◆ hasLinks()

BacklinkCache::hasLinks ( $table )

Check if there are any backlinks.

Parameters

string $table

Returns: bool

Definition at line 358 of file BacklinkCache.php.

◆ partition()

BacklinkCache::partition	(		$table,
			$batchSize )

Partition the backlinks into batches.

Returns an array giving the start and end of each range. The first batch has a start of false, and the last batch has an end of false.

Parameters

string	$table	The links table name
int	$batchSize

Returns: array

Definition at line 428 of file BacklinkCache.php.

References $res, and wfDebug().

◆ partitionResult()

BacklinkCache::partitionResult	(	$res,
		$batchSize,
		$isComplete = true )

protected

Partition a DB result with backlinks in it into batches.

Parameters

IResultWrapper	$res	Database result
int	$batchSize
bool	$isComplete	Whether $res includes all the backlinks

Exceptions

MWException

Returns: array

Definition at line 517 of file BacklinkCache.php.

References $res.

◆ queryLinks()

BacklinkCache::queryLinks	(	$table,
		$startId,
		$endId,
		$max,
		$select = 'all' )

protected

Get the backlinks for a given table.

Cached in process memory only.

Parameters

string	$table
int \| bool	$startId
int \| bool	$endId
int	$max
string	$select	'all' or 'ids'

Returns: IResultWrapper

Definition at line 211 of file BacklinkCache.php.

References $res, getDB(), and wfDebug().

◆ setDB()

BacklinkCache::setDB ( $db )

Set the Database object to use.

Parameters

IDatabase $db

Definition at line 151 of file BacklinkCache.php.

Member Data Documentation

◆ $db

BacklinkCache::$db

protected

Local copy of a database object.

Accessor: BacklinkCache::getDB() Mutator : BacklinkCache::setDB() Cleared with BacklinkCache::clear()

Definition at line 91 of file BacklinkCache.php.

◆ $fullResultCache

IResultWrapper [] BacklinkCache::$fullResultCache = []

protected

Contains the whole links from a database result.

This is raw data that will be partitioned in $partitionCache

Initialized with BacklinkCache::getLinks() Cleared with BacklinkCache::clear()

Definition at line 79 of file BacklinkCache.php.

◆ $instance

BacklinkCache BacklinkCache::$instance

staticprotected

Definition at line 55 of file BacklinkCache.php.

◆ $page

PageReference BacklinkCache::$page

protected

Local copy of a PageReference object.

Definition at line 97 of file BacklinkCache.php.

◆ $partitionCache

array [] BacklinkCache::$partitionCache = []

protected

Multi dimensions array representing batches.

Keys are:

‍(string) links table name (int) batch size 'numRows' : Number of rows for this link table 'batches' : [ $start, $end ]

See also: BacklinkCache::partitionResult()

Cleared with BacklinkCache::clear()

Definition at line 69 of file BacklinkCache.php.

◆ $wanCache

WANObjectCache BacklinkCache::$wanCache

protected

Definition at line 82 of file BacklinkCache.php.

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

includes/cache/BacklinkCache.php

Public Member Functions

Static Public Member Functions

Protected Member Functions

Protected Attributes

Static Protected Attributes

Detailed Description

Constructor & Destructor Documentation

◆ __construct()

Member Function Documentation

◆ clear()

◆ get()

◆ getCascadeProtectedLinkPages()

◆ getCascadeProtectedLinks()

◆ getConditions()

◆ getDB()

◆ getLinkPages()

◆ getLinks()

◆ getNumLinks()

◆ getPage()

◆ getPrefix()

◆ hasLinks()

◆ partition()

◆ partitionResult()

◆ queryLinks()

◆ setDB()

Member Data Documentation

◆ $db

◆ $fullResultCache

◆ $instance

◆ $page

◆ $partitionCache

◆ $wanCache