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Class yii\mutex\FileMutex

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

FileMutex implements mutex "lock" mechanism via local file system files.

This component relies on PHP flock() function.

Application configuration example:

[
    'components' => [
        'mutex' => [
            'class' => 'yii\mutex\FileMutex'
        ],
    ],
]

Note: this component can maintain the locks only for the single web server, it probably will not suffice in case you are using cloud server solution.

Warning: due to flock() function nature this component is unreliable when using a multithreaded server API like ISAPI.

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. This property is read-only.	yii\base\Component
$dirMode	integer	The permission to be set for newly created directories.	yii\mutex\FileMutex
$fileMode	integer	The permission to be set for newly created mutex files.	yii\mutex\FileMutex
$isWindows	boolean	Whether file handling should assume a Windows file system.	yii\mutex\FileMutex
$mutexPath	string	The directory to store mutex files.	yii\mutex\FileMutex
$retryDelay	integer	Number of milliseconds between each try in acquire() until specified timeout times out.	yii\mutex\RetryAcquireTrait

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 mutex component implementation dedicated for UNIX, GNU/Linux, Mac OS X, and other UNIX-like operating systems.	yii\mutex\FileMutex
isAcquired()	Checks if a lock is currently acquired	yii\mutex\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

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Method	Description	Defined By
acquireLock()	Acquires lock by given name.	yii\mutex\FileMutex
getLockFilePath()	Generate path for lock file.	yii\mutex\FileMutex
releaseLock()	Releases lock by given name.	yii\mutex\FileMutex

Property Details

$dirMode public property

The permission to be set for newly created directories. This value will be used by PHP chmod() function. No umask will be applied. Defaults to 0775, meaning the directory is read-writable by owner and group, but read-only for other users.

public integer $dirMode = 0775

$fileMode public property

The permission to be set for newly created mutex files. This value will be used by PHP chmod() function. No umask will be applied. If not set, the permission will be determined by the current environment.

public integer $fileMode = null

$isWindows public property (available since version 2.0.16)

Whether file handling should assume a Windows file system. This value will determine how releaseLock() goes about deleting the lock file. If not set, it will be determined by checking the DIRECTORY_SEPARATOR constant.

public boolean $isWindows = null

$mutexPath public property

The directory to store mutex files. You may use path alias here. Defaults to the "mutex" subdirectory under the application runtime path.

public string $mutexPath = '@runtime/mutex'

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.

getLockFilePath() protected method (available since version 2.0.10)

Generate path for lock file.

protected string getLockFilePath ( $name )
$name	string

init() public method

Initializes mutex component implementation dedicated for UNIX, GNU/Linux, Mac OS X, and other UNIX-like operating systems.

public void init ( )
throws	yii\base\InvalidConfigException

releaseLock() protected method

Releases lock by given name.

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