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Class yii\caching\TagDependency

继承yii\caching\TagDependency » yii\caching\Dependency » yii\base\BaseObject
实现yii\base\Configurable
可用版本自2.0
源码 https://github.com/yiichina/yii2/blob/api/framework/caching/TagDependency.php

TagDependency associates a cached data item with one or multiple $tags.

By calling invalidate(), you can invalidate all cached data items that are associated with the specified tag name(s).

// setting multiple cache keys to store data forever and tagging them with "user-123"
Yii::$app->cache->set('user_42_profile', '', 0, new TagDependency(['tags' => 'user-123']));
Yii::$app->cache->set('user_42_stats', '', 0, new TagDependency(['tags' => 'user-123']));

// invalidating all keys tagged with "user-123"
TagDependency::invalidate(Yii::$app->cache, 'user-123');

For more details and usage information on Cache, see the guide article on caching.

公共属性

隐藏继承的属性

属性类型描述被定义在
$data mixed The dependency data that is saved in cache and later is compared with the latest dependency data. yii\caching\Dependency
$reusable boolean Whether this dependency is reusable or not. yii\caching\Dependency
$tags string|array A list of tag names for this dependency. yii\caching\TagDependency

公共方法

隐藏继承的方法

方法描述被定义在
__call() Calls the named method which is not a class method. yii\base\BaseObject
__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
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
evaluateDependency() Evaluates the dependency by generating and saving the data related with dependency. yii\caching\Dependency
getHasChanged() Returns a value indicating whether the dependency has changed. yii\caching\Dependency
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 the object. yii\base\BaseObject
invalidate() Invalidates all of the cached data items that are associated with any of the specified $tags. yii\caching\TagDependency
isChanged() Checks whether the dependency is changed. yii\caching\TagDependency
resetReusableData() Resets all cached data for reusable dependencies. yii\caching\Dependency

受保护的方法

隐藏继承的方法

方法描述被定义在
generateDependencyData() Generates the data needed to determine if dependency has been changed. yii\caching\TagDependency
generateReusableHash() Generates a unique hash that can be used for retrieving reusable dependency data. yii\caching\Dependency
getTimestamps() Returns the timestamps for the specified tags. yii\caching\TagDependency
touchKeys() Generates the timestamp for the specified cache keys. yii\caching\TagDependency

属性详情

$tags 公共 属性

A list of tag names for this dependency. For a single tag, you may specify it as a string.

public string|array $tags = []

方法详情

generateDependencyData() 受保护 方法

Generates the data needed to determine if dependency has been changed.

This method does nothing in this class.

protected mixed generateDependencyData($cache)
$cache yii\caching\CacheInterface

The cache component that is currently evaluating this dependency

return mixed

The data needed to determine if dependency has been changed.

getTimestamps() 受保护 方法

Returns the timestamps for the specified tags.

protected array getTimestamps($cache, $tags)
$cache yii\caching\CacheInterface
$tags string[]
return array

The timestamps indexed by the specified tags.

invalidate() 公共 静态 方法

Invalidates all of the cached data items that are associated with any of the specified $tags.

public static void invalidate($cache, $tags)
$cache yii\caching\CacheInterface

The cache component that caches the data items

$tags string|array
isChanged() 公共 方法

Checks whether the dependency is changed.

public boolean isChanged($cache)
$cache yii\caching\CacheInterface

The cache component that is currently evaluating this dependency

return boolean

Whether the dependency has changed.

touchKeys() 受保护 静态 方法

Generates the timestamp for the specified cache keys.

protected static array touchKeys($cache, $keys)
$cache yii\caching\CacheInterface
$keys string[]
return array

The timestamp indexed by cache keys