Enum hotmic::Facet

pub enum Facet<T> {
    Count(T),
    Gauge(T),
    TimingPercentile(T),
    ValuePercentile(T),
}

Type of computation against aggregated/processed samples.

Facets are, in essence, views over given metrics: a count tallys up all the counts for a given metric to keep a single, globally-consistent value for all the matching samples seen, etc.

More simply, facets are essentially the same thing as a metric type: counters, gauges, histograms, etc. We treat them a little different because callers are never directly saying that they want to change the value of a counter, or histogram, they're saying that for a given metric type, they care about certain facets.

Variants

Count(T)

A count.

This could be the number of timing samples seen for a given metric, or the total count if modified via count samples.

Gauge(T)

A gauge.

Gauges are singluar values, and operate in last-write-wins mode.

TimingPercentile(T)

Timing-specific percentiles.

The histograms that back percentiles are currently hard-coded to track a windowed view of 60 seconds, with a 1 second interval. That is, they only store the last 60 seconds worth of data that they've been given.

ValuePercentile(T)

Value-specific percentiles.

The histograms that back percentiles are currently hard-coded to track a windowed view of 60 seconds, with a 1 second interval. That is, they only store the last 60 seconds worth of data that they've been given.

Trait Implementations

impl<T: PartialEq> PartialEq for Facet<T>

fn eq(&self, other: &Facet<T>) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Facet<T>) -> bool

This method tests for !=.

impl<T: Eq> Eq for Facet<T>

impl<T: Hash> Hash for Facet<T>

fn hash<__HT: Hasher>(&self, state: &mut __HT)

Feeds this value into the given [Hasher].

fn hash_slice<H>(data: &[Self], state: &mut H) where     H: Hasher,

Feeds a slice of this type into the given [Hasher].

impl<T: Clone> Clone for Facet<T>

fn clone(&self) -> Facet<T>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for Facet<T>

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

Formats the value using the given formatter.