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use core::*;
use scores::*;
use publish::*;
use std::fmt::Debug;
use std::collections::HashMap;
use std::sync::{Arc, RwLock};
pub fn aggregate<E, M>(stat_fn: E, to_chain: Chain<M>) -> Chain<Aggregate>
where
E: Fn(Kind, &str, ScoreType) -> Option<(Kind, Vec<&str>, Value)> + Send + Sync + 'static,
M: Clone + Send + Sync + Debug + 'static,
{
let metrics = Arc::new(RwLock::new(HashMap::new()));
let metrics0 = metrics.clone();
let publish = Arc::new(Publisher::new(stat_fn, to_chain));
Chain::new(
move |kind, name, _rate| {
metrics
.write()
.unwrap()
.entry(name.to_string())
.or_insert_with(|| Arc::new(Scoreboard::new(kind, name.to_string())))
.clone()
},
move |_buffered| {
let metrics = metrics0.clone();
let publish = publish.clone();
ControlScopeFn::new(move |cmd| match cmd {
ScopeCmd::Write(metric, value) => {
let metric: &Aggregate = metric;
metric.update(value)
},
ScopeCmd::Flush => {
let metrics = metrics.read().expect("Locking metrics scoreboards");
let snapshot = metrics.values().flat_map(|score| score.reset()).collect();
publish.publish(snapshot);
}
})
},
)
}
#[derive(Debug, Clone)]
pub struct Aggregator {
metrics: Arc<RwLock<HashMap<String, Arc<Scoreboard>>>>,
publish: Arc<Publish>,
}
impl Aggregator {
pub fn with_capacity(size: usize, publish: Arc<Publish>) -> Aggregator {
Aggregator {
metrics: Arc::new(RwLock::new(HashMap::with_capacity(size))),
publish: publish.clone(),
}
}
pub fn cleanup(&self) {
let orphans: Vec<String> = self.metrics.read().unwrap().iter()
.filter(|&(_k, v)| Arc::strong_count(v) == 1)
.map(|(k, _v)| k.to_string())
.collect();
if !orphans.is_empty() {
let mut remover = self.metrics.write().unwrap();
orphans.iter().for_each(|k| {
remover.remove(k);
});
}
}
}
pub type Aggregate = Arc<Scoreboard>;
#[cfg(feature = "bench")]
mod bench {
use super::*;
use test;
use core::Kind::*;
use output::*;
#[bench]
fn time_bench_write_event(b: &mut test::Bencher) {
let sink = aggregate(summary, to_void());
let metric = sink.define_metric(Marker, "event_a", 1.0);
let scope = sink.open_scope(false);
b.iter(|| test::black_box(scope.write(&metric, 1)));
}
#[bench]
fn time_bench_write_count(b: &mut test::Bencher) {
let sink = aggregate(summary, to_void());
let metric = sink.define_metric(Counter, "count_a", 1.0);
let scope = sink.open_scope(false);
b.iter(|| test::black_box(scope.write(&metric, 1)));
}
#[bench]
fn time_bench_read_event(b: &mut test::Bencher) {
let sink = aggregate(summary, to_void());
let metric = sink.define_metric(Marker, "marker_a", 1.0);
b.iter(|| test::black_box(metric.reset()));
}
#[bench]
fn time_bench_read_count(b: &mut test::Bencher) {
let sink = aggregate(summary, to_void());
let metric = sink.define_metric(Counter, "count_a", 1.0);
b.iter(|| test::black_box(metric.reset()));
}
}