autometrics 3.0.0

Easily add metrics to your code that actually help you spot and debug issues in production. Built on Prometheus and OpenTelemetry.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25

use super::TraceLabels;
use opentelemetry::trace::TraceContextExt as _;
use std::iter::FromIterator;
use tracing::Span;
use tracing_opentelemetry::OpenTelemetrySpanExt;

pub fn get_exemplar() -> Option<TraceLabels> {
    // Get the OpenTelemetry Context from the tracing span
    let context = OpenTelemetrySpanExt::context(&Span::current());

    // Now get the OpenTelemetry "span" from the Context
    // (it's confusing because the word "span" is used by both tracing and OpenTelemetry
    // to mean slightly different things)
    let span = context.span();
    let span_context = span.span_context();

    if span_context.is_valid() {
        Some(TraceLabels::from_iter([
            ("trace_id", span_context.trace_id().to_string()),
            ("span_id", span_context.span_id().to_string()),
        ]))
    } else {
        None
    }
}