ExternalStoreDB Class Reference

DB accessable external objects. More...

Inheritance diagram for ExternalStoreDB:

Collaboration diagram for ExternalStoreDB:

List of all members.

Public Member Functions
&	fetchBlob ($cluster, $id, $itemID)
	Fetch a blob item out of the database; a cache of the last-loaded blob will be kept so that multiple loads out of a multi-item blob can avoid redundant database access and decompression.
	fetchFromURL ($url)
	The URL returned is of the form of the form DB://cluster/id or DB://cluster/id/itemid for concatened storage.
&	getLoadBalancer ($cluster)
	Get a LoadBalancer for the specified cluster.
&	getMaster ($cluster)
	Get a master database connection for the specified cluster.
&	getSlave ($cluster)
	Get a slave database connection for the specified cluster.
	getTable (&$db)
	Get the 'blobs' table name for this database.
	store ($cluster, $data)

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Detailed Description

DB accessable external objects.

In this system, each store "location" maps to a database "cluster". The clusters must be defined in the normal LBFactory configuration.

Definition at line 31 of file ExternalStoreDB.php.

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Member Function Documentation

& ExternalStoreDB::fetchBlob	(	$	cluster,
		$	id,
		$	itemID
	)

Fetch a blob item out of the database; a cache of the last-loaded blob will be kept so that multiple loads out of a multi-item blob can avoid redundant database access and decompression.

Parameters:

$cluster
$id
$itemID

Returns:

mixed

Access:

private

Definition at line 145 of file ExternalStoreDB.php.

References $dbr, $ret, array(), false, getMaster(), getSlave(), getTable(), and wfDebugLog().

Referenced by fetchFromURL().

ExternalStoreDB::fetchFromURL

(

$

url

)

The URL returned is of the form of the form DB://cluster/id or DB://cluster/id/itemid for concatened storage.

See also:

ExternalStoreMedium::fetchFromURL()

Reimplemented from ExternalStoreMedium.

Definition at line 38 of file ExternalStoreDB.php.

References $path, $ret, $url, and fetchBlob().

& ExternalStoreDB::getLoadBalancer

(

$

cluster

)

Get a LoadBalancer for the specified cluster.

Parameters:

string

$cluster

cluster name

Returns:

LoadBalancer object

Definition at line 81 of file ExternalStoreDB.php.

References wfGetLBFactory().

Referenced by getMaster(), and getSlave().

& ExternalStoreDB::getMaster

(

$

cluster

)

Get a master database connection for the specified cluster.

Parameters:

string

$cluster

cluster name

Returns:

DatabaseBase object

Definition at line 115 of file ExternalStoreDB.php.

References $lb, array(), and getLoadBalancer().

Referenced by fetchBlob(), and store().

& ExternalStoreDB::getSlave

(

$

cluster

)

Get a slave database connection for the specified cluster.

Parameters:

string

$cluster

cluster name

Returns:

DatabaseBase object

Definition at line 93 of file ExternalStoreDB.php.

References $lb, array(), getLoadBalancer(), global, and wfDebug().

Referenced by fetchBlob().

ExternalStoreDB::getTable

(

&$

db

)

Get the 'blobs' table name for this database.

Parameters:

$db	DatabaseBase

Returns:

String: table name ('blobs' by default)

Definition at line 127 of file ExternalStoreDB.php.

Referenced by fetchBlob(), and store().

ExternalStoreDB::store	(	$	cluster,
		$	data
	)

See also:

ExternalStoreMedium::store()

Reimplemented from ExternalStoreMedium.

Definition at line 59 of file ExternalStoreDB.php.

References array(), getMaster(), and getTable().

Referenced by CompressOld\compressPage().

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

• includes/externalstore/ExternalStoreDB.php