Struct Counter

pub struct Counter { /* private fields */ }

Open Metrics Counter to measure discrete events.

Single monotonically increasing value metric.

Implementations

impl Counter

pub fn new(help: &'static str) -> Self

Constructs a new counter, based on the given help.

pub fn inc(&self) -> u64

Increases the Counter by 1, returning the previous value.

pub fn inc_by(&self, v: u64) -> u64

Increases the Counter by u64, returning the previous value.

pub fn set(&self, v: u64) -> u64

Sets the Counter value, returning the previous value.

Warning: this is not default behavior for a counter that should always be monotonically increasing.

pub fn get(&self) -> u64

Returns the current value of the Counter.

Trait Implementations

impl Clone for Counter

fn clone(&self) -> Counter

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Counter

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

Formats the value using the given formatter.

impl Metric for Counter

fn value(&self) -> MetricValue

Returns the current value of this metric.

fn type(&self) -> MetricType

Returns the type of this metric.

fn help(&self) -> &'static str

Returns the help string for this metric.

fn as_any(&self) -> &dyn Any

Casts this metric to Any for downcasting to concrete types.