balter 0.3.2

A load/stress testing framework.
Documentation 
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use super::ScenarioConfig;
use crate::stats::RunStatistics;
use crate::tps_sampler::TpsSampler;
use humantime::format_duration;
use std::future::Future;
use std::num::NonZeroU32;
#[allow(unused_imports)]
use std::time::{Duration, Instant};
#[allow(unused_imports)]
use tracing::{debug, error, info, instrument, trace, warn, Instrument};

#[instrument(name="scenario", skip_all, fields(name=config.name))]
pub(crate) async fn run_direct<T, F>(scenario: T, config: ScenarioConfig) -> RunStatistics
where
    T: Fn() -> F + Send + Sync + 'static + Clone,
    F: Future<Output = ()> + Send,
{
    info!("Running {} with config {:?}", config.name, &config);

    let start = Instant::now();

    let (goal_tps, concurrency) = config.direct().unwrap();
    let goal_tps = NonZeroU32::new(goal_tps).unwrap();
    let mut sampler = TpsSampler::new(scenario, goal_tps);
    sampler.set_concurrent_count(concurrency);

    // NOTE: This loop is time-sensitive. Any long awaits or blocking will throw off measurements
    loop {
        let sample = sampler.sample_tps().await;

        info!(
            "Sample: {:.2}TPS, {}/{} ({}), {}",
            sample.tps(),
            sample.success_count,
            sample.error_count,
            sample.total(),
            format_duration(sample.elapsed),
        );

        if start.elapsed() > config.duration {
            break;
        }
    }
    sampler.wait_for_shutdown().await;

    info!("Scenario complete");

    RunStatistics {
        concurrency,
        goal_tps,
        stable: true,
    }
}