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|
use tracing::{
debug, error, info, instrument, level_filters::LevelFilter, span, trace, warn, Level,
};
use tracing_subscriber::{layer::SubscriberExt, registry::Registry, Layer};
use tracing_tree::HierarchicalLayer;
fn main() {
let layer = HierarchicalLayer::default()
.with_writer(std::io::stdout)
.with_indent_lines(true)
.with_indent_amount(2)
.with_thread_names(true)
.with_thread_ids(true)
.with_verbose_exit(true)
.with_verbose_entry(true)
.with_deferred_spans(true)
.with_targets(true)
.with_span_modes(true)
.with_filter(LevelFilter::DEBUG);
let subscriber = Registry::default().with(layer);
tracing::subscriber::set_global_default(subscriber).unwrap();
#[cfg(feature = "tracing-log")]
tracing_log::LogTracer::init().unwrap();
let app_span = span!(Level::DEBUG, "hierarchical-example", version = %0.1);
let _e = app_span.enter();
let server_span = span!(Level::DEBUG, "server", host = "localhost", port = 8080);
println!("-> This prints before the span open message");
let _e2 = server_span.enter();
info!("starting");
std::thread::sleep(std::time::Duration::from_millis(1000));
span!(Level::INFO, "empty-span").in_scope(|| {
// empty span
});
info!("listening");
// Defer two levels of spans
println!("-> Deferring two levels of spans");
span!(Level::INFO, "connections").in_scope(|| {
let peer1 = span!(Level::DEBUG, "conn", peer_addr = "82.9.9.9", port = 42381);
peer1.in_scope(|| {
debug!(peer = "peer1", "connected");
std::thread::sleep(std::time::Duration::from_millis(300));
debug!(length = 2, "message received");
});
drop(peer1);
let peer2 = span!(Level::DEBUG, "conn", peer_addr = "82.9.9.9", port = 61548);
// This span will not be printed at all since no event in it will pass the filter
peer2.in_scope(|| {
trace!(peer = "peer2", "connected");
std::thread::sleep(std::time::Duration::from_millis(300));
trace!(length = 2, "message received");
});
drop(peer2);
let peer3 = span!(Level::DEBUG, "conn", peer_addr = "8.8.8.8", port = 18230);
peer3.in_scope(|| {
std::thread::sleep(std::time::Duration::from_millis(300));
debug!(peer = "peer3", "connected");
});
drop(peer3);
let peer4 = span!(
Level::DEBUG,
"foomp",
normal_var = 43,
"{} <- format string",
42
);
peer4.in_scope(|| {
error!("hello");
});
drop(peer4);
let peer1 = span!(Level::DEBUG, "conn", peer_addr = "82.9.9.9", port = 42381);
peer1.in_scope(|| {
warn!(algo = "xor", "weak encryption requested");
std::thread::sleep(std::time::Duration::from_millis(300));
debug!(length = 8, "response sent");
debug!("disconnected");
});
drop(peer1);
let peer2 = span!(Level::DEBUG, "conn", peer_addr = "8.8.8.8", port = 18230);
peer2.in_scope(|| {
debug!(length = 5, "message received");
std::thread::sleep(std::time::Duration::from_millis(300));
debug!(length = 8, "response sent");
debug!("disconnected");
});
drop(peer2);
});
warn!("internal error");
log::error!("this is a log message");
info!("exit");
}
#[instrument]
fn call_a(name: &str) {
info!(name, "got a name");
call_b(name)
}
#[instrument]
fn call_b(name: &str) {
info!(name, "got a name");
}
|
