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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 } } }}; }