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#![cfg_attr(feature = "bench", feature(test))]
#![warn(
missing_copy_implementations,
missing_debug_implementations,
missing_docs,
trivial_casts,
trivial_numeric_casts,
unused_extern_crates,
unused_import_braces,
unused_qualifications,
)]
#[cfg(feature = "bench")]
extern crate test;
#[macro_use]
extern crate log;
#[macro_use]
extern crate lazy_static;
#[macro_use]
extern crate error_chain;
extern crate time;
extern crate cached;
extern crate num;
extern crate scheduled_executor;
mod pcg32;
mod multi;
pub mod error {
error_chain! {
foreign_links {
Io(::std::io::Error);
}
}
}
pub mod sampling;
pub mod aggregate;
pub mod publish;
pub mod statsd;
pub mod logging;
pub mod cache;
pub use num::ToPrimitive;
pub use std::net::ToSocketAddrs;
pub use aggregate::*;
pub use multi::*;
pub use publish::*;
pub use statsd::*;
pub use logging::*;
pub use cache::*;
use std::sync::Arc;
use std::fmt::Debug;
pub type Value = u64;
#[derive(Debug, Copy, Clone)]
pub struct TimeHandle(u64);
impl TimeHandle {
pub fn now() -> TimeHandle {
TimeHandle(time::precise_time_ns())
}
pub fn elapsed_us(self) -> Value {
(TimeHandle::now().0 - self.0) / 1_000
}
}
pub type Rate = f64;
pub const FULL_SAMPLING_RATE: Rate = 1.0;
#[derive(Debug)]
pub struct Event<C: MetricSink + 'static> {
metric: <C as MetricSink>::Metric,
target_writer: Arc<<C as MetricSink>::Writer>,
}
impl<C: MetricSink> Event<C> {
pub fn mark(&self) {
self.target_writer.write(&self.metric, 1);
}
}
#[derive(Debug)]
pub struct Gauge<C: MetricSink + 'static> {
metric: <C as MetricSink>::Metric,
target_writer: Arc<<C as MetricSink>::Writer>,
}
impl<C: MetricSink> Gauge<C> {
pub fn value<V>(&self, value: V) where V: ToPrimitive {
self.target_writer.write(&self.metric, value.to_u64().unwrap());
}
}
#[derive(Debug)]
pub struct Counter<C: MetricSink + 'static> {
metric: <C as MetricSink>::Metric,
target_writer: Arc<<C as MetricSink>::Writer>,
}
impl<C: MetricSink> Counter<C> {
pub fn count<V>(&self, count: V) where V: ToPrimitive {
self.target_writer.write(&self.metric, count.to_u64().unwrap());
}
}
#[derive(Debug)]
pub struct Timer<C: MetricSink + 'static> {
metric: <C as MetricSink>::Metric,
target_writer: Arc<<C as MetricSink>::Writer>,
}
impl<C: MetricSink> Timer<C> {
pub fn interval_us<V>(&self, interval_us: V) -> V where V: ToPrimitive {
self.target_writer.write(&self.metric, interval_us.to_u64().unwrap());
interval_us
}
pub fn start(&self) -> TimeHandle {
TimeHandle::now()
}
pub fn stop(&self, start_time: TimeHandle) -> u64 {
let elapsed_us = start_time.elapsed_us();
self.interval_us(elapsed_us)
}
pub fn time<F, R>(&self, operations: F) -> R where F: FnOnce() -> R {
let start_time = self.start();
let value: R = operations();
self.stop(start_time);
value
}
}
#[derive(Debug)]
pub struct Metrics<C: MetricSink + 'static> {
prefix: String,
target: Arc<C>,
writer: Arc<<C as MetricSink>::Writer>,
}
impl<C: MetricSink> Metrics<C> {
pub fn new(target: C) -> Metrics<C> {
let target_writer = target.new_writer();
Metrics {
prefix: "".to_string(),
target: Arc::new(target),
writer: Arc::new(target_writer),
}
}
fn qualified_name<S: Into<String> + AsRef<str>>(&self, name: S) -> String {
if self.prefix.is_empty() {
return name.into()
}
let mut buf:String = self.prefix.clone();
buf.push_str(name.as_ref());
buf.to_string()
}
pub fn event<S: Into<String> + AsRef<str>>(&self, name: S) -> Event<C> {
let metric = self.target.new_metric(MetricKind::Event, self.qualified_name(name), 1.0);
Event {
metric,
target_writer: self.writer.clone(),
}
}
pub fn counter<S: Into<String> + AsRef<str>>(&self, name: S) -> Counter<C> {
let metric = self.target.new_metric(MetricKind::Count, self.qualified_name(name), 1.0);
Counter {
metric,
target_writer: self.writer.clone(),
}
}
pub fn timer<S: Into<String> + AsRef<str>>(&self, name: S) -> Timer<C> {
let metric = self.target.new_metric(MetricKind::Time, self.qualified_name(name), 1.0);
Timer{
metric,
target_writer: self.writer.clone(),
}
}
pub fn gauge<S: Into<String> + AsRef<str>>(&self, name: S) -> Gauge<C> {
let metric = self.target.new_metric(MetricKind::Gauge, self.qualified_name(name), 1.0);
Gauge{
metric,
target_writer: self.writer.clone(),
}
}
pub fn with_prefix<S: Into<String>>(&self, prefix: S) -> Self {
Metrics {
prefix: prefix.into(),
target: self.target.clone(),
writer: self.writer.clone(),
}
}
}
#[cfg(feature = "bench")]
mod bench {
use aggregate::MetricAggregator;
use ::*;
use test::Bencher;
#[bench]
fn time_bench_direct_dispatch_event(b: &mut Bencher) {
let (sink, source) = aggregate();
let metrics = metrics(sink);
let event = metrics.event("aaa");
b.iter(|| event.mark());
}
}
#[macro_export]
macro_rules! time {
($timer: expr, $body: expr) => {{
let start_time = $timer.start();
let value = $body;
$timer.stop(start_time);
value
}}
}
#[derive(Debug, Copy, Clone)]
pub enum MetricKind {
Event,
Count,
Gauge,
Time,
}
pub trait MetricSink: Debug {
type Metric: MetricKey + Debug;
type Writer: MetricWriter<Self::Metric>;
fn new_metric<S: AsRef<str>>(&self, kind: MetricKind, name: S, sampling: Rate) -> Self::Metric;
fn new_writer(&self) -> Self::Writer;
}
pub trait MetricKey: Debug {}
pub trait MetricWriter<M: MetricKey>: Send + Debug {
fn write(&self, metric: &M, value: Value);
fn flush(&self) {}
}
pub trait AsSource {
fn as_source(&self) -> AggregateSource;
}
pub trait AsSink<S: MetricSink> {
fn as_sink(&self) -> S;
}
pub trait IntoSink<S: MetricSink> {
fn into_sink(self) -> S;
}
impl<S: MetricSink> IntoSink<S> for S {
fn into_sink(self) -> Self {
self
}
}
pub fn metrics<IS, S>(sink: IS) -> Metrics<S> where IS: IntoSink<S>, S: MetricSink {
Metrics::new(sink.into_sink())
}
pub fn sample<IS, S>(rate: Rate, sink: IS) -> sampling::SamplingSink<S> where IS: IntoSink<S>, S: MetricSink {
sampling::SamplingSink::new(sink.into_sink(), rate)
}
pub fn cache<IS, S>(size: usize, sink: IS) -> cache::MetricCache<S> where IS: IntoSink<S>, S: MetricSink {
cache::MetricCache::new(sink.into_sink(), size)
}
pub fn log<S: AsRef<str>>(log: S) -> logging::LoggingSink {
logging::LoggingSink::new(log)
}
pub fn statsd<S: AsRef<str>, A: ToSocketAddrs>(address: A, prefix: S) -> error::Result<statsd::StatsdSink> {
Ok(statsd::StatsdSink::new(address, prefix)?)
}
impl<IS1, S1, IS2, S2> IntoSink<multi::DoubleSink<S1, S2>> for (IS1, IS2) where IS1: IntoSink<S1>, S1: MetricSink, IS2: IntoSink<S2>, S2: MetricSink {
fn into_sink(self) -> multi::DoubleSink<S1, S2> {
multi::DoubleSink::new(self.0.into_sink(), self.1.into_sink())
}
}
impl<IS1, S1, IS2, S2, IS3, S3> IntoSink<multi::DoubleSink<S1, multi::DoubleSink<S2, S3>>> for (IS1, IS2, IS3) where IS1: IntoSink<S1>, S1: MetricSink, IS2: IntoSink<S2>, S2: MetricSink, IS3: IntoSink<S3>, S3: MetricSink {
fn into_sink(self) -> multi::DoubleSink<S1, multi::DoubleSink<S2, S3>> {
multi::DoubleSink::new(self.0.into_sink(), multi::DoubleSink::new(self.1.into_sink(), self.2.into_sink()))
}
}
pub fn aggregate() -> (AggregateSink, AggregateSource) {
let agg = MetricAggregator::new();
(agg.as_sink(), agg.as_source())
}
pub fn publish<S: MetricSink + Sync>(source: AggregateSource, sink: S) -> AggregatePublisher<S> {
publish::AggregatePublisher::new(source, sink,)
}