Abstract Class yii\caching\Dependency

继承yii\caching\Dependency » yii\base\BaseObject
实现yii\base\Configurable
子类yii\caching\ChainedDependency, yii\caching\DbDependency, yii\caching\DbQueryDependency, yii\caching\ExpressionDependency, yii\caching\FileDependency, yii\caching\TagDependency
可用自版本2.0
源代码 https://github.com/yiisoft/yii2/blob/master/framework/caching/Dependency.php

Dependency is the base class for cache dependency classes.

Child classes should override its generateDependencyData() for generating the actual dependency data.

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

公共方法

隐藏继承的方法

方法描述定义在
__call() 调用不是类方法的已命名方法. yii\base\BaseObject
__construct() 构造函数. yii\base\BaseObject
__get() 返回对象属性的值. yii\base\BaseObject
__isset() 检查属性是否已设置, 即已定义且不为null. yii\base\BaseObject
__set() 设置对象属性的值. yii\base\BaseObject
__unset() 将对象属性设置为null. yii\base\BaseObject
canGetProperty() 返回一个值, 指示属性是否可读. yii\base\BaseObject
canSetProperty() 返回一个值, 指示属性是否可写. yii\base\BaseObject
className() 返回此类的完全限定名称. 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() 返回一个值, 指示方法是否已定义. yii\base\BaseObject
hasProperty() 返回一个值, 指示属性是否已定义. yii\base\BaseObject
init() 初始化对象. yii\base\BaseObject
isChanged() Checks whether the dependency is changed. yii\caching\Dependency
resetReusableData() Resets all cached data for reusable dependencies. yii\caching\Dependency

受保护的方法

隐藏继承的方法

方法描述定义在
generateDependencyData() Generates the data needed to determine if dependency is changed. yii\caching\Dependency
generateReusableHash() Generates a unique hash that can be used for retrieving reusable dependency data. yii\caching\Dependency

属性详情

$data public 属性

The dependency data that is saved in cache and later is compared with the latest dependency data.

public mixed $data null
$reusable public 属性

Whether this dependency is reusable or not. True value means that dependent data for this cache dependency will be generated only once per request. This allows you to use the same cache dependency for multiple separate cache calls while generating the same page without an overhead of re-evaluating dependency data each time. Defaults to false.

public boolean $reusable false

方法详情

evaluateDependency() public 方法

Evaluates the dependency by generating and saving the data related with dependency.

This method is invoked by cache before writing data into it.

public void evaluateDependency ( $cache )
$cache yii\caching\CacheInterface

The cache component that is currently evaluating this dependency

generateDependencyData() protected abstract 方法

Generates the data needed to determine if dependency is changed.

Derived classes should override this method to generate the actual dependency data.

protected abstract 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.

generateReusableHash() protected 方法

Generates a unique hash that can be used for retrieving reusable dependency data.

参见 $reusable.

protected string generateReusableHash ( )
return string

A unique hash value for this cache dependency.

getHasChanged() public 方法
弃用 since version 2.0.11. Will be removed in version 2.1. Use isChanged() instead.

Returns a value indicating whether the dependency has changed.

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

The cache component that is currently evaluating this dependency

return boolean

Whether the dependency has changed.

isChanged() public 方法 (可用自版本: 2.0.11)

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.

resetReusableData() public static 方法

Resets all cached data for reusable dependencies.

public static void resetReusableData ( )