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use crate::core::{ArgminKV, ArgminOp, Error, IterState, Observe};
use slog;
use slog::{info, o, Drain, Record, Serializer, KV};
use slog_async;
use slog_async::OverflowStrategy;
use slog_json;
use slog_term;
use std::fs::OpenOptions;
use std::sync::Mutex;
#[derive(Clone)]
pub struct ArgminSlogLogger {
logger: slog::Logger,
}
impl ArgminSlogLogger {
pub fn term() -> Self {
ArgminSlogLogger::term_internal(OverflowStrategy::Block)
}
pub fn term_noblock() -> Self {
ArgminSlogLogger::term_internal(OverflowStrategy::Drop)
}
fn term_internal(overflow_strategy: OverflowStrategy) -> Self {
let decorator = slog_term::TermDecorator::new().build();
let drain = slog_term::FullFormat::new(decorator)
.use_original_order()
.build()
.fuse();
let drain = slog_async::Async::new(drain)
.overflow_strategy(overflow_strategy)
.build()
.fuse();
ArgminSlogLogger {
logger: slog::Logger::root(drain, o!()),
}
}
pub fn file(file: &str, truncate: bool) -> Result<Self, Error> {
ArgminSlogLogger::file_internal(file, OverflowStrategy::Block, truncate)
}
pub fn file_noblock(file: &str, truncate: bool) -> Result<Self, Error> {
ArgminSlogLogger::file_internal(file, OverflowStrategy::Drop, truncate)
}
fn file_internal(
file: &str,
overflow_strategy: OverflowStrategy,
truncate: bool,
) -> Result<Self, Error> {
let file = OpenOptions::new()
.create(true)
.write(true)
.truncate(truncate)
.open(file)?;
let drain = Mutex::new(slog_json::Json::new(file).build()).map(slog::Fuse);
let drain = slog_async::Async::new(drain)
.overflow_strategy(overflow_strategy)
.build()
.fuse();
Ok(ArgminSlogLogger {
logger: slog::Logger::root(drain, o!()),
})
}
}
pub struct ArgminSlogKV {
pub kv: Vec<(&'static str, String)>,
}
impl KV for ArgminSlogKV {
fn serialize(&self, _record: &Record, serializer: &mut dyn Serializer) -> slog::Result {
for idx in self.kv.clone().iter().rev() {
serializer.emit_str(idx.0, &idx.1.to_string())?;
}
Ok(())
}
}
impl<O: ArgminOp> KV for IterState<O> {
fn serialize(&self, _record: &Record, serializer: &mut dyn Serializer) -> slog::Result {
serializer.emit_str(
"modify_func_count",
&self.get_modify_func_count().to_string(),
)?;
serializer.emit_str(
"hessian_func_count",
&self.get_hessian_func_count().to_string(),
)?;
serializer.emit_str(
"jacobian_func_count",
&self.get_jacobian_func_count().to_string(),
)?;
serializer.emit_str("grad_func_count", &self.get_grad_func_count().to_string())?;
serializer.emit_str("cost_func_count", &self.get_cost_func_count().to_string())?;
serializer.emit_str("best_cost", &self.get_best_cost().to_string())?;
serializer.emit_str("cost", &self.get_cost().to_string())?;
serializer.emit_str("iter", &self.get_iter().to_string())?;
Ok(())
}
}
impl<'a> From<&'a ArgminKV> for ArgminSlogKV {
fn from(i: &'a ArgminKV) -> ArgminSlogKV {
ArgminSlogKV { kv: i.kv.clone() }
}
}
impl<O: ArgminOp> Observe<O> for ArgminSlogLogger {
fn observe_init(&self, msg: &str, kv: &ArgminKV) -> Result<(), Error> {
info!(self.logger, "{}", msg; ArgminSlogKV::from(kv));
Ok(())
}
fn observe_iter(&mut self, state: &IterState<O>, kv: &ArgminKV) -> Result<(), Error> {
info!(self.logger, ""; state, ArgminSlogKV::from(kv));
Ok(())
}
}
#[cfg(test)]
mod tests {
use super::*;
send_sync_test!(argmin_slog_loggerv, ArgminSlogLogger);
}