garage/src/util/metrics.rs
Alex Auvolat ad917ffd3f
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Fix instant substractions that might have panicked
2022-09-29 15:53:54 +02:00

63 lines
1.3 KiB
Rust

use std::time::Instant;
use futures::{future::BoxFuture, Future, FutureExt};
use rand::Rng;
use opentelemetry::{metrics::*, trace::TraceId, KeyValue};
pub trait RecordDuration<'a>: 'a {
type Output;
fn record_duration(
self,
r: &'a ValueRecorder<f64>,
attributes: &'a [KeyValue],
) -> BoxFuture<'a, Self::Output>;
fn bound_record_duration(self, r: &'a BoundValueRecorder<f64>) -> BoxFuture<'a, Self::Output>;
}
impl<'a, T, O> RecordDuration<'a> for T
where
T: Future<Output = O> + Send + 'a,
{
type Output = O;
fn record_duration(
self,
r: &'a ValueRecorder<f64>,
attributes: &'a [KeyValue],
) -> BoxFuture<'a, Self::Output> {
async move {
let request_start = Instant::now();
let res = self.await;
r.record(
Instant::now()
.saturating_duration_since(request_start)
.as_secs_f64(),
attributes,
);
res
}
.boxed()
}
fn bound_record_duration(self, r: &'a BoundValueRecorder<f64>) -> BoxFuture<'a, Self::Output> {
async move {
let request_start = Instant::now();
let res = self.await;
r.record(
Instant::now()
.saturating_duration_since(request_start)
.as_secs_f64(),
);
res
}
.boxed()
}
}
// ----
pub fn gen_trace_id() -> TraceId {
rand::thread_rng().gen::<[u8; 16]>().into()
}