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pub mod file;
pub mod slog_logger;
use crate::{ArgminKV, ArgminOp, Error, IterState};
use serde::{Deserialize, Serialize};
use std::default::Default;
use std::sync::Arc;
pub use file::*;
pub use slog_logger::*;
pub trait Observe<O: ArgminOp>: Send + Sync {
fn observe_init(&self, _name: &str, _kv: &ArgminKV) -> Result<(), Error> {
Ok(())
}
fn observe_iter(&self, _state: &IterState<O>, _kv: &ArgminKV) -> Result<(), Error> {
Ok(())
}
}
#[derive(Clone, Default)]
pub struct Observer<O> {
observers: Vec<(Arc<Observe<O>>, ObserverMode)>,
}
impl<O: ArgminOp> Observer<O> {
pub fn new() -> Self {
Observer { observers: vec![] }
}
pub fn push<OBS: Observe<O> + 'static>(
&mut self,
observer: OBS,
mode: ObserverMode,
) -> &mut Self {
self.observers.push((Arc::new(observer), mode));
self
}
}
impl<O: ArgminOp> Observe<O> for Observer<O> {
fn observe_init(&self, msg: &str, kv: &ArgminKV) -> Result<(), Error> {
for l in self.observers.iter() {
l.0.observe_init(msg, kv)?
}
Ok(())
}
fn observe_iter(&self, state: &IterState<O>, kv: &ArgminKV) -> Result<(), Error> {
use ObserverMode::*;
for l in self.observers.iter() {
let iter = state.get_iter();
match l.1 {
Always => l.0.observe_iter(state, kv),
Every(i) if iter % i == 0 => l.0.observe_iter(state, kv),
NewBest if state.is_best() => l.0.observe_iter(state, kv),
Never | Every(_) | NewBest => Ok(()),
}?
}
Ok(())
}
}
#[derive(Copy, Clone, Serialize, Deserialize, Debug, Eq, PartialEq, Ord, PartialOrd)]
pub enum ObserverMode {
Never,
Always,
Every(u64),
NewBest,
}
impl Default for ObserverMode {
fn default() -> ObserverMode {
ObserverMode::Always
}
}
#[cfg(test)]
mod tests {
use super::*;
use crate::MinimalNoOperator;
send_sync_test!(observer, Observer<MinimalNoOperator>);
send_sync_test!(observermode, ObserverMode);
}