Class yii\mutex\FileMutex

Inheritanceyii\mutex\FileMutex » yii\mutex\Mutex » yii\base\Component » yii\base\BaseObject
Implementsyii\base\Configurable
Available since version2.0
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.

See also yii\mutex\Mutex.

Public Properties

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PropertyTypeDescriptionDefined 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
$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
$mutexPath string The directory to store mutex files. yii\mutex\FileMutex

Public Methods

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MethodDescriptionDefined By
__call() Calls the named method which is not a class method. yii\base\BaseObject
__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 an object property. yii\base\BaseObject
__isset() Checks if a property is set, i.e. defined and not null. yii\base\BaseObject
__set() Sets value of an object property. yii\base\BaseObject
__unset() Sets an object property to null. yii\base\BaseObject
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\BaseObject
canSetProperty() Returns a value indicating whether a property can be set. yii\base\BaseObject
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\BaseObject
hasProperty() Returns a value indicating whether a property is defined. yii\base\BaseObject
init() Initializes mutex component implementation dedicated for UNIX, GNU/Linux, Mac OS X, and other UNIX-like operating systems. yii\mutex\FileMutex
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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MethodDescriptionDefined 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
$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.