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

Public Member Functions
	__construct (Title $title)
	Create a new BacklinkCache.
	__sleep ()
	Serialization handler, diasallows to serialize the database to prevent failures after this class is deserialized from cache with dead DB connection.
	clear ()
	Clear locally stored data and database object.
	getLinks ($table, $startId=false, $endId=false, $max=INF)
	Get the backlinks for a given table.
	getNumLinks ($table, $max=INF)
	Get the approximate number of backlinks.
	hasLinks ($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 (Title $title)
	Create a new BacklinkCache or reuse any existing one.
Public Attributes
const	CACHE_EXPIRY = 3600
Protected Member Functions
	getConditions ($table)
	Get the SQL condition array for selecting backlinks, with a join on the page table.
	getDB ()
	Get the slave 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.
	$fullResultCache = array()
	Contains the whole links from a database result.
	$partitionCache = array()
	Multi dimensions array representing batches.
	$title
	Local copy of a Title object.
Static Protected Attributes
static	$cache

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 $title->getBacklinkCache().

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 44 of file BacklinkCache.php.

Constructor & Destructor Documentation

BacklinkCache::__construct ( Title $ title )

Create a new BacklinkCache.

Parameters:

Title $title : Title object to create a backlink cache for

Definition at line 91 of file BacklinkCache.php.

References $title, and title.

Member Function Documentation

BacklinkCache::__sleep ( )

Serialization handler, diasallows to serialize the database to prevent failures after this class is deserialized from cache with dead DB connection.

Returns:: array

Definition at line 122 of file BacklinkCache.php.

References array().

BacklinkCache::clear ( )

Clear locally stored data and database object.

Definition at line 129 of file BacklinkCache.php.

References array().

static BacklinkCache::get ( Title $ title ) [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.

Parameters:

Title $title Title object to get a backlink cache for

Returns:: BacklinkCache

Definition at line 103 of file BacklinkCache.php.

References $cache, and $title.

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|null

Definition at line 274 of file BacklinkCache.php.

References $conds, array(), getPrefix(), title, and wfRunHooks().

Referenced by queryLinks().

BacklinkCache::getDB ( ) [protected]

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

Returns:: DatabaseBase

Definition at line 149 of file BacklinkCache.php.

References wfGetDB().

Referenced by queryLinks().

BacklinkCache::getLinks	(	$	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 \| INF	$max

Returns:: TitleArrayFromResult

Definition at line 165 of file BacklinkCache.php.

References TitleArray\newFromResult(), and queryLinks().

Referenced by getNumLinks().

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

Get the approximate number of backlinks.

Parameters:

string	$table
int \| INF	$max	Only count up to this many backlinks

Returns:: int

Definition at line 330 of file BacklinkCache.php.

References $count, $wgMemc, getLinks(), global, partition(), title, and wfMemcKey().

Referenced by hasLinks().

BacklinkCache::getPrefix ( $ table ) [protected]

Get the field name prefix for a given table.

Parameters:

string $table

Exceptions:

MWException

Returns:: null|string

Definition at line 245 of file BacklinkCache.php.

References array(), and wfRunHooks().

Referenced by getConditions(), and queryLinks().

BacklinkCache::hasLinks ( $ table )

Check if there are any backlinks.

Parameters:

string $table

Returns:: bool

Definition at line 320 of file BacklinkCache.php.

References getNumLinks().

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 379 of file BacklinkCache.php.

References $res, $wgMemc, array(), global, list, partitionResult(), queryLinks(), title, wfDebug(), and wfMemcKey().

Referenced by getNumLinks().

BacklinkCache::partitionResult	(	$	res,
		$	batchSize,
		$	isComplete = `true`
	)		`[protected]`

Partition a DB result with backlinks in it into batches.

Parameters:

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

Exceptions:

MWException

Returns:: array

Definition at line 459 of file BacklinkCache.php.

References $res, and array().

Referenced by partition().

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 \| INF	$max
string	$select	'all' or 'ids'

Returns:: ResultWrapper

Definition at line 178 of file BacklinkCache.php.

References $conds, $options, $res, array(), getConditions(), getDB(), getPrefix(), wfDebug(), wfProfileIn(), and wfProfileOut().

Referenced by getLinks(), and partition().

BacklinkCache::setDB ( $ db )

Set the Database object to use.

Parameters:

DatabaseBase $db

Definition at line 140 of file BacklinkCache.php.

References $db.

Member Data Documentation

BacklinkCache::$cache [static, protected]

Definition at line 46 of file BacklinkCache.php.

BacklinkCache::$db [protected]

Local copy of a database object.

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

Definition at line 77 of file BacklinkCache.php.

Referenced by setDB().

BacklinkCache::$fullResultCache = array() [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 68 of file BacklinkCache.php.

BacklinkCache::$partitionCache = array() [protected]

Multi dimensions array representing batches.

Keys are: > (string) links table name > (int) batch size > 'numRows' : Number of rows for this link table > 'batches' : array( $start, $end )

See also:: BacklinkCache::partitionResult()

Cleared with BacklinkCache::clear()

Definition at line 59 of file BacklinkCache.php.

BacklinkCache::$title [protected]

Local copy of a Title object.

Definition at line 82 of file BacklinkCache.php.

Referenced by __construct(), and get().

const BacklinkCache::CACHE_EXPIRY = 3600

Definition at line 84 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

Public Attributes

Protected Member Functions

Protected Attributes

Static Protected Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation