Readings 的分析探测工具

Readings 的目标是使进程关键指标的探测尽可能简单。

这是必须嵌入客户端代码的探测库。

请参阅 Readings

// this is optional but the cost may be worth it. YMMV. It instruments
// Rust global allocator.
readings_probe::instrumented_allocator!();

fn main() -> readings_probe::ReadingsResult<()> {
    // setup the probe
    let mut probe =
        readings_probe::Probe::new(std::fs::File::create("readings.out").unwrap()).unwrap();

    // We will use an AtomicI64 to communicate a user-defined metrics ("progress") to the probe.
    let progress = probe.register_i64("progress".to_string())?;

    // Starts the probe (1sec i a lot. heartbeat can be realistically set as low as a few millis).
    probe.spawn_heartbeat(std::time::Duration::from_millis(1000))?;

    // do some stuff, update progress
    let percent_done = 12;
    progress.store(percent_done, std::sync::atomic::Ordering::Relaxed);

    // do more stuff, log an event
    probe.log_event("about to get crazy")?;

    // still more stuff, and another event
    probe.log_event("done")?;
    Ok(())
}