Struct ConfigChangeEvent 

pub struct ConfigChangeEvent {
    pub key: String,
    pub old_value: Option<String>,
    pub new_value: String,
}

Event fired when a configuration property changes. 当配置属性发生更改时触发的事件。

Equivalent to Spring Cloud’s EnvironmentChangeEvent. 等价于 Spring Cloud 的 EnvironmentChangeEvent。

Fields

key: String

The key of the changed property / 已更改属性的键

old_value: Option<String>

The old value (None if the property is new) / 旧值（如果属性是新的则为 None）

new_value: String

The new value / 新值

Implementations

impl ConfigChangeEvent

pub fn new( key: impl Into<String>, old_value: Option<impl Into<String>>, new_value: impl Into<String>, ) -> Self

Create a new config change event / 创建新的配置变更事件

pub fn is_new(&self) -> bool

Whether this event represents a new property / 此事件是否代表新属性

pub fn is_removed(&self) -> bool

Whether the value was removed (empty new value) / 值是否被移除（新值为空）

Trait Implementations

impl Clone for ConfigChangeEvent

fn clone(&self) -> ConfigChangeEvent

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ConfigChangeEvent

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.