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Class yii\mutex\MysqlMutex

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Inheritance	yii\mutex\MysqlMutex » yii\mutex\DbMutex » yii\mutex\Mutex » yii\base\Component » yii\base\BaseObject
Implements	yii\base\Configurable
Available since version	2.0
Source Code	https://github.com/yiisoft/yii2/blob/master/framework/mutex/MysqlMutex.php

MysqlMutex implements mutex "lock" mechanism via MySQL locks.

Application configuration example:

[
    'components' => [
        'db' => [
            'class' => 'yii\db\Connection',
            'dsn' => 'mysql:host=127.0.0.1;dbname=demo',
        ]
        'mutex' => [
            'class' => 'yii\mutex\MysqlMutex',
        ],
    ],
]

Public Properties

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Property	Type	Description	Defined By
$autoRelease	boolean	Whether all locks acquired in this process (i.e. local locks) must be released automatically before finishing script execution.	yii\mutex\Mutex
$behaviors	yii\base\Behavior[]	List of behaviors attached to this component	yii\base\Component
$db	yii\db\Connection\|array\|string	The DB connection object or the application component ID of the DB connection.	yii\mutex\DbMutex

Public Methods

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Method	Description	Defined By
__call()	Calls the named method which is not a class method.	yii\base\Component
__clone()	This method is called after the object is created by cloning an existing one.	yii\base\Component
__construct()	Constructor.	yii\base\BaseObject
__get()	Returns the value of a component property.	yii\base\Component
__isset()	Checks if a property is set, i.e. defined and not null.	yii\base\Component
__set()	Sets the value of a component property.	yii\base\Component
__unset()	Sets a component property to be null.	yii\base\Component
acquire()	Acquires a lock by name.	yii\mutex\Mutex
attachBehavior()	Attaches a behavior to this component.	yii\base\Component
attachBehaviors()	Attaches a list of behaviors to the component.	yii\base\Component
behaviors()	Returns a list of behaviors that this component should behave as.	yii\base\Component
canGetProperty()	Returns a value indicating whether a property can be read.	yii\base\Component
canSetProperty()	Returns a value indicating whether a property can be set.	yii\base\Component
className()	Returns the fully qualified name of this class.	yii\base\BaseObject
detachBehavior()	Detaches a behavior from the component.	yii\base\Component
detachBehaviors()	Detaches all behaviors from the component.	yii\base\Component
ensureBehaviors()	Makes sure that the behaviors declared in behaviors() are attached to this component.	yii\base\Component
getBehavior()	Returns the named behavior object.	yii\base\Component
getBehaviors()	Returns all behaviors attached to this component.	yii\base\Component
hasEventHandlers()	Returns a value indicating whether there is any handler attached to the named event.	yii\base\Component
hasMethod()	Returns a value indicating whether a method is defined.	yii\base\Component
hasProperty()	Returns a value indicating whether a property is defined for this component.	yii\base\Component
init()	Initializes MySQL specific mutex component implementation.	yii\mutex\MysqlMutex
off()	Detaches an existing event handler from this component.	yii\base\Component
on()	Attaches an event handler to an event.	yii\base\Component
release()	Releases acquired lock. This method will return false in case the lock was not found.	yii\mutex\Mutex
trigger()	Triggers an event.	yii\base\Component

Protected Methods

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Method	Description	Defined By
acquireLock()	Acquires lock by given name.	yii\mutex\MysqlMutex
hashLockName()	Generate hash for lock name to avoid exceeding lock name length limit.	yii\mutex\MysqlMutex
releaseLock()	Releases lock by given name.	yii\mutex\MysqlMutex

Method Details

acquireLock() protected method

Acquires lock by given name.

protected boolean acquireLock ( $name, $timeout = 0 )
$name	string	Of the lock to be acquired.
$timeout	integer	Time (in seconds) to wait for lock to become released.
return	boolean	Acquiring result.

hashLockName() protected method (available since version 2.0.16)

Generate hash for lock name to avoid exceeding lock name length limit.

protected string hashLockName ( $name )
$name	string

init() public method

Initializes MySQL specific mutex component implementation.

public void init ( )
throws	yii\base\InvalidConfigException	if $db is not MySQL connection.

releaseLock() protected method

Releases lock by given name.

protected boolean releaseLock ( $name )
$name	string	Of the lock to be released.
return	boolean	Release result.