loates 0.1.0-alpha

Loates is a load testing framework, with focus on ease of use and flexiblity.
Documentation 
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use std::time::Duration;

use chrono::{DateTime, Utc};

use super::task_event::{metrics::MetricValue, MetricSetKey};

/// Output Message genenerated by this tracing layer
#[derive(Debug, Clone)]
#[cfg_attr(feature = "serde", derive(serde::Serialize))]
pub enum Message {
    TaskTime {
        execution_id: usize,
        scenario_id: usize,
        duration: Duration,
    },
    ExecutorStart {
        id: usize,
        #[cfg_attr(feature = "serde", serde(serialize_with = "serialize_to_rfc3339_opts"))]
        start_time: DateTime<Utc>,
        prior_executor_duration: Duration,
    },
    ExecutorUpdate {
        id: usize,
        users: u64,
        max_users: u64,
        #[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none"))]
        total_iteration: Option<u64>,
        #[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none"))]
        total_duration: Option<Duration>,
        #[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none"))]
        stage: Option<usize>,
        #[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none"))]
        stage_duration: Option<Duration>,
        #[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none"))]
        stages: Option<usize>,
        metrics: Vec<(MetricSetKey, MetricValue)>,
    },
    ExecutorEnd {
        id: usize,
    },
    Error {
        err: String,
    },
    TerminatedError {
        err: String,
    },
    ScenarioChanged {
        scenario_id: usize,
    },
    End,
}

#[cfg(feature = "serde")]
pub fn serialize_to_rfc3339_opts<S: serde::Serializer>(
    t: &DateTime<Utc>,
    s: S,
) -> Result<S::Ok, S::Error> {
    serde::Serialize::serialize(&t.to_rfc3339_opts(chrono::SecondsFormat::Millis, false), s)
}