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use crate::{
clear::Clear,
hdr_histogram::AtomicHdrHistogram,
metric::{Histogram, Metric},
time_source::{Instant, StdInstant},
};
use aspect::{Advice, Enter, OnResult};
use serde::{Serialize, Serializer};
use std::ops::Deref;
#[derive(Clone)]
pub struct ResponseTime<H: Histogram = AtomicHdrHistogram, T: Instant = StdInstant>(
pub H,
std::marker::PhantomData<T>,
);
impl<H: Histogram, T: Instant> Default for ResponseTime<H, T> {
fn default() -> Self {
ResponseTime(H::with_bound(5 * 60 * 1000), std::marker::PhantomData)
}
}
impl<H: Histogram, T: Instant, R> Metric<R> for ResponseTime<H, T> {}
impl<H: Histogram, T: Instant> Enter for ResponseTime<H, T> {
type E = T;
fn enter(&self) -> T {
T::now()
}
}
impl<H: Histogram, T: Instant, R> OnResult<R> for ResponseTime<H, T> {
fn leave_scope(&self, enter: T) -> Advice {
let elapsed = enter.elapsed_time();
self.0.record(elapsed);
Advice::Return
}
}
impl<H: Histogram, T: Instant> Clear for ResponseTime<H, T> {
fn clear(&self) {
self.0.clear();
}
}
impl<H: Histogram + Serialize, T: Instant> Serialize for ResponseTime<H, T> {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: Serializer,
{
Serialize::serialize(&self.0, serializer)
}
}
use std::{fmt, fmt::Debug};
impl<H: Histogram + Debug, T: Instant> Debug for ResponseTime<H, T> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "{:?}", &self.0)
}
}
impl<H: Histogram, T: Instant> Deref for ResponseTime<H, T> {
type Target = H;
fn deref(&self) -> &Self::Target {
&self.0
}
}