Class yii\redis\Mutex

Inheritance	yii\redis\Mutex » yii\mutex\Mutex » yii\base\Component » yii\base\Object
Implements	yii\base\Configurable
Available since version	2.0.6
Source Code	https://github.com/yiisoft/yii2-redis/blob/master/Mutex.php

Redis Mutex implements a mutex component using redis as the storage medium.

Redis Mutex requires redis version 2.6.12 or higher to work properly.

It needs to be configured with a redis yii\redis\Connection that is also configured as an application component. By default it will use the redis application component.

To use redis Mutex as the application component, configure the application as follows:

[
    'components' => [
        'mutex' => [
            'class' => 'yii\redis\Mutex',
            'redis' => [
                'hostname' => 'localhost',
                'port' => 6379,
                'database' => 0,
            ]
        ],
    ],
]

Or if you have configured the redis yii\redis\Connection as an application component, the following is sufficient:

[
    'components' => [
        'mutex' => [
            'class' => 'yii\redis\Mutex',
            // 'redis' => 'redis' // id of the connection application component
        ],
    ],
]

See also:

• yii\mutex\Mutex
• http://redis.io/topics/distlock

Public Properties

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
$expire	integer	The number of seconds in which the lock will be auto released.	yii\redis\Mutex
$keyPrefix	string	A string prefixed to every cache key so that it is unique.	yii\redis\Mutex
$redis	yii\redis\Connection|string|array	The Redis yii\redis\Connection object or the application component ID of the Redis yii\redis\Connection.	yii\redis\Mutex

Public Methods

Method	Description	Defined By
__call()	Calls the named method which is not a class method.	yii\base\Object
__clone()	This method is called after the object is created by cloning an existing one.	yii\base\Component
__construct()	Constructor.	yii\base\Object
__get()	Returns the value of an object property.	yii\base\Object
__isset()	Checks if a property is set, i.e. defined and not null.	yii\base\Object
__set()	Sets value of an object property.	yii\base\Object
__unset()	Sets an object property to null.	yii\base\Object
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\Object
canSetProperty()	Returns a value indicating whether a property can be set.	yii\base\Object
className()	Returns the fully qualified name of this class.	yii\base\Object
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\Object
hasProperty()	Returns a value indicating whether a property is defined.	yii\base\Object
init()	Initializes the redis Mutex component.	yii\redis\Mutex
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

Method	Description	Defined By
acquireLock()	Acquires a lock by name.	yii\redis\Mutex
calculateKey()	Generates a unique key used for storing the mutex in Redis.	yii\redis\Mutex
releaseLock()	Releases acquired lock. This method will return false in case the lock was not found or Redis command failed.	yii\redis\Mutex

Property Details

$expire public property

The number of seconds in which the lock will be auto released.

public integer $expire = 30

$keyPrefix public property

A string prefixed to every cache key so that it is unique. If not set, it will use a prefix generated from \yii\redis\Application::id. You may set this property to be an empty string if you don't want to use key prefix. It is recommended that you explicitly set this property to some static value if the cached data needs to be shared among multiple applications.

public string $keyPrefix = null

$redis public property

The Redis yii\redis\Connection object or the application component ID of the Redis yii\redis\Connection. This can also be an array that is used to create a redis yii\redis\Connection instance in case you do not want do configure redis connection as an application component. After the Mutex object is created, if you want to change this property, you should only assign it with a Redis yii\redis\Connection object.

public yii\redis\Connection|string|array $redis = 'redis'

Method Details