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use crate::{
atomic::AtomicInt,
clear::Clear,
metric::{Counter, Metric},
};
use aspect::{Advice, Enter, OnResult};
use serde::Serialize;
use std::ops::Deref;
#[derive(Clone, Default, Debug, Serialize)]
pub struct ErrorCount<C: Counter = AtomicInt<u64>>(pub C);
impl<C: Counter, T, E> Metric<Result<T, E>> for ErrorCount<C> {}
impl<C: Counter> Enter for ErrorCount<C> {
type E = ();
fn enter(&self) {}
}
impl<C: Counter, T, E> OnResult<Result<T, E>> for ErrorCount<C> {
fn on_result(&self, _: (), r: &Result<T, E>) -> Advice {
if r.is_err() {
self.0.incr();
}
Advice::Return
}
}
impl<C: Counter> Clear for ErrorCount<C> {
fn clear(&self) {
self.0.clear()
}
}
impl<C: Counter> Deref for ErrorCount<C> {
type Target = C;
fn deref(&self) -> &Self::Target {
&self.0
}
}