rust_tracing_spans_and_log_events_quickstart.rs

1use tracing::{info, warn, span, Level};
2use tracing_subscriber;
3
4fn main() {
5    // Install a subscriber to collect and record trace data.
6    // In a real application, this is typically done once at the start of main.
7    tracing_subscriber::fmt::init();
8
9    // Spans represent a period of time in which a program was executing.
10    let span = span!(Level::INFO, "my_span");
11    let _enter = span.enter();
12
13    // Events represent a single point in time.
14    info!("something happened");
15    warn!("something might be wrong");
16    
17    // You can also include fields in your logs
18    let user = "ferris";
19    info!(user, "notifying user");
20}