mirror of
https://github.com/actix/examples
synced 2025-02-02 09:39:03 +01:00
29 lines
839 B
Rust
29 lines
839 B
Rust
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use std::array;
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use metrics::Unit;
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use metrics_exporter_prometheus::{PrometheusBuilder, PrometheusHandle};
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use crate::metric_names::*;
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pub(crate) fn init() -> PrometheusHandle {
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metrics::describe_histogram!(
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HISTOGRAM_HTTP_REQUEST_DURATION,
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Unit::Seconds,
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"Duration (in seconds) a request took to be processed"
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);
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PrometheusBuilder::new()
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.set_buckets_for_metric(
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metrics_exporter_prometheus::Matcher::Full(HISTOGRAM_HTTP_REQUEST_DURATION.to_owned()),
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&exp_buckets::<28>(0.001), // values from ~0.3ms -> ~33s
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)
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.unwrap()
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.install_recorder()
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.unwrap()
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}
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fn exp_buckets<const N: usize>(base: f64) -> [f64; N] {
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const RATIO: f64 = 1.5;
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array::from_fn(|i| base * RATIO.powi(i as i32 - 3)).map(|val| (val * 1_e7).round() / 1_e7)
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}
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