Skip to main content

PoolMetricsSource

Struct PoolMetricsSource 

Source
pub struct PoolMetricsSource { /* private fields */ }
Expand description

持有只读 Pool 句柄的结构化指标源。

Implementations§

Source§

impl PoolMetricsSource

Source

pub fn new( driver: DatabaseDriver, pools: Vec<(String, Arc<dyn PoolSnapshot>)>, ) -> Result<Self>

业务作用:从启动期连接目录建立 Pool 状态出口。

参数说明:

  • driver:指定后端
  • pools:为固定名称与只读句柄。

返回:名称合法且不重复时返回源,未创建任何采样线程。

Source

pub fn series_budget(&self) -> usize

业务作用:预留每个 Pool 的固定 gauge 系列预算。

参数说明:无。

返回:total、idle、in_use 和上限的系列总数。

Trait Implementations§

Source§

impl LegacyMetricsSource for PoolMetricsSource

Source§

fn descriptors(&self) -> &'static [&'static MetricDescriptor]

业务作用:发布后端中立的 Pool gauge 描述符。

参数说明:无。

返回:状态规模和配置上限两个固定族。

Source§

fn snapshot(&self) -> Option<Vec<MetricSample>>

业务作用:抓取时读取 Pool 并用饱和差值计算使用数。

参数说明:无。

返回:不因 total 与 idle 并发变化而下溢的近似快照。

Source§

fn render_prometheus(&self, _output: &mut String)

业务作用:保持所有出口统一消费结构化 Pool 样本。

参数说明:

  • _output:为旧文本回退缓冲区。

返回:无;由 MetricHub 完成文本编码。

Auto Trait Implementations§

Blanket Implementations§

Source§

impl<T> Any for T
where T: 'static + ?Sized,

Source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
Source§

impl<T> Borrow<T> for T
where T: ?Sized,

Source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
Source§

impl<T> BorrowMut<T> for T
where T: ?Sized,

Source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
Source§

impl<T> From<T> for T

Source§

fn from(t: T) -> T

Returns the argument unchanged.

Source§

impl<T> Instrument for T

Source§

fn instrument(self, span: Span) -> Instrumented<Self> ⓘ

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
Source§

fn in_current_span(self) -> Instrumented<Self> ⓘ

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
Source§

impl<T, U> Into<U> for T
where U: From<T>,

Source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

Source§

impl<T, U> TryFrom<U> for T
where U: Into<T>,

Source§

type Error = !

The type returned in the event of a conversion error.
Source§

fn try_from(value: U) -> Result<T, !>

Performs the conversion.
Source§

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

Source§

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
Source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
Source§

impl<T> WithSubscriber for T

Source§

fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self> ⓘ
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
Source§

fn with_current_subscriber(self) -> WithDispatch<Self> ⓘ

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more