cf-rustracing

OpenTracing API for Rust.

Documentation

Examples

use cf_rustracing::sampler::AllSampler;
use cf_rustracing::tag::Tag;
use cf_rustracing::Tracer;
use std::thread;
use std::time::Duration;

#[tokio::main]
async fn main() {
    // Creates a tracer
    let (tracer, mut span_rx) = Tracer::new(AllSampler);
    {
        // Starts "parent" span
        let parent_span = tracer.span("parent").start_with_state(());
        thread::sleep(Duration::from_millis(10));
        {
            // Starts "child" span
            let mut child_span = tracer
                .span("child_span")
                .child_of(&parent_span)
                .tag(Tag::new("key", "value"))
                .start_with_state(());
    
            child_span.log(|log| {
                log.error().message("a log message");
            });
        } // The "child" span dropped and will be sent to `span_rx`
    } // The "parent" span dropped and will be sent to `span_rx`
    
    println!("# SPAN: {:?}", span_rx.recv().await);
    println!("# SPAN: {:?}", span_rx.recv().await);
}

As an actual usage example of the crate and an implementation of the OpenTracing API, it may be helpful to looking at rustracing_jaeger crate.

References

• The OpenTracing Semantic Specification (v1.1)