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
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
|
// Copyright (C) 2023 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//! Usage sample for a tracing subscriber in libatrace_rust.
use tracing::{debug, error, event, info, span, trace, warn, Level};
use atrace_tracing_subscriber::AtraceSubscriber;
use tracing_subscriber::{layer::SubscriberExt, util::SubscriberInitExt};
#[tracing::instrument]
fn mul_by_100_instrumented(num: i32) -> i32 {
let result = num * 100;
std::thread::sleep(std::time::Duration::from_millis(300));
event!(Level::INFO, num, result);
result
}
fn events_and_spans_demo() {
let power_level = 8999;
event!(Level::INFO, foo = "bar", power_level, "This is a {} message", "formattable");
std::thread::sleep(std::time::Duration::from_millis(100));
let span = span!(Level::TRACE, "Span name", baz = "quux");
std::thread::sleep(std::time::Duration::from_millis(300));
let _span_guard = span.enter();
let _entered_span = span!(Level::TRACE, "Entered span").entered();
std::thread::sleep(std::time::Duration::from_millis(300));
trace!("test {} log {}", "VERBOSE", mul_by_100_instrumented(42));
debug!("test {} log", "DEBUG");
info!("test {} log", "INFO");
warn!("test {} log", "WARNING");
error!("test {} log", "ERROR");
}
fn main() -> Result<(), Box<dyn std::error::Error>> {
tracing_subscriber::registry()
.with(AtraceSubscriber::default().with_filter())
.with(tracing_subscriber::fmt::layer())
.init();
events_and_spans_demo();
Ok(())
}
|
