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// Copyright 2021 MaidSafe.net limited.
//
// This SAFE Network Software is licensed to you under The General Public License (GPL), version 3.
// Unless required by applicable law or agreed to in writing, the SAFE Network Software distributed
// under the GPL Licence is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. Please review the Licences for the specific language governing
// permissions and limitations relating to use of the SAFE Network Software.
/// Run code when a chaotic. Defaults to 20% of the time. Overall frequence can be set via "SAFE_CHAOS_LEVEL" env var.
#[macro_export]
macro_rules! with_chaos {
( $x:expr) => {{
#[cfg(feature = "chaos")]
{
use rand::distributions::{Distribution, Uniform};
use std::env;
use tracing::{debug, warn};
let mut rng = rand::thread_rng();
// 20% chance of happening
let chaos_trigger: usize = env::var("SAFE_CHAOS_LEVEL")
.unwrap_or("20".to_string())
.parse()
.unwrap_or(20);
let die = Uniform::from(1..100);
let throw = die.sample(&mut rng);
debug!(
"Threshold for \"chaos\" to occur is < {}, we rolled: {}",
chaos_trigger, throw
);
if throw <= chaos_trigger {
// do the chaos
warn!("Chaos!");
$x
}
}
}};
}