MySqlLockManager Class Reference

MySQL version of DBLockManager that supports shared locks. More...

Inheritance diagram for MySqlLockManager:

Collaboration diagram for MySqlLockManager:

List of all members.

Protected Member Functions
	doLockingQuery ($lockDb, array $paths, $type)
	Get a connection to a lock DB and acquire locks on $paths.
	initConnection ($lockDb, DatabaseBase $db)
	Do additional initialization for new lock DB connection.
Protected Attributes
	$lockTypeMap

---

Detailed Description

MySQL version of DBLockManager that supports shared locks.

All locks are non-blocking, which avoids deadlocks.

Definition at line 408 of file DBLockManager.php.

---

Member Function Documentation

MySqlLockManager::doLockingQuery	(	$	lockDb,
		array $	paths,
		$	type
	)		[protected]

Get a connection to a lock DB and acquire locks on $paths.

This does not use GET_LOCK() per http://bugs.mysql.com/bug.php?id=1118.

Parameters:

$lockDb	string
$paths	Array
$type	integer LockManager::LOCK_EX or LockManager::LOCK_SH

Returns:

bool Resources able to be locked

Exceptions:

DBError

Reimplemented from DBLockManager.

Definition at line 421 of file DBLockManager.php.

References $keys, and DBLockManager\getConnection().

Here is the call graph for this function:

MySqlLockManager::initConnection	(	$	lockDb,
		DatabaseBase $	db
	)		[protected]

Do additional initialization for new lock DB connection.

Parameters:

$lockDb	string
$db	DatabaseBase

Returns:

void

Exceptions:

DBError

Reimplemented from DBLockManager.

Definition at line 416 of file DBLockManager.php.

References DatabaseBase\query().

Here is the call graph for this function:

---

Member Data Documentation

MySqlLockManager::$lockTypeMap [protected]

Initial value:

 array(
                self::LOCK_SH => self::LOCK_SH,
                self::LOCK_UW => self::LOCK_SH,
                self::LOCK_EX => self::LOCK_EX
        )

Reimplemented from LockManager.

Definition at line 410 of file DBLockManager.php.

---

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

• includes/filerepo/backend/lockmanager/DBLockManager.php