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use collectors::rscollector::RS_COLLECTOR_STATS_SAMPLES_METRICNAME;
use bosun_emitter::{BosunClient, Datum, EmitterResult};
use bosun_emitter;
use chan::Receiver;
use chan;
use std::thread::JoinHandle;
use std::thread;
use std::time::{Duration, SystemTime, UNIX_EPOCH};
static TICK_INTERVAL_SEC: u64 = 15u64;
pub type Tags = bosun_emitter::Tags;
#[derive(Debug)]
pub struct Sample {
pub time: u64,
pub metric: String,
pub value: f64,
pub tags: Tags,
}
impl Sample {
pub fn new<T: Into<String>, U: Into<f64>>(metric: T, value: U) -> Self {
Sample::new_with_tags(metric, value, Tags::new())
}
pub fn new_with_tags<T: Into<String>, U: Into<f64>>(metric: T, value: U, tags: Tags) -> Self {
let now = SystemTime::now().duration_since(UNIX_EPOCH).unwrap().as_secs();
Sample { time: now, metric: metric.into(), value: value.into(), tags: tags }
}
}
pub enum Rate {
Gauge,
Counter,
Rate,
}
impl Into<String> for Rate {
fn into(self) -> String {
match self {
Rate::Gauge => "gauge".to_string(),
Rate::Counter => "counter".to_string(),
Rate::Rate => "rate".to_string(),
}
}
}
#[derive(Debug)]
pub struct Metadata {
pub metric: String,
pub rate: String,
pub unit: String,
pub description: String,
}
impl Metadata {
pub fn new<S: Into<String>, T: Into<String>, U: Into<String>>( metric: S, rate: Rate, unit: T, description: U )
-> Self {
Metadata { metric: metric.into(), rate: rate.into(), unit: unit.into(), description: description.into() }
}
}
#[derive(Debug)]
pub enum BosunRequest {
Sample(Sample),
Metadata(Metadata),
Shutdown,
}
pub struct Bosun {
queue: Vec<Sample>,
from_main_rx: Receiver<BosunRequest>,
bosun_client: BosunClient,
default_tags: Tags,
hostname: String,
}
impl Bosun {
pub fn new(host: &str, hostname: &str, default_tags: &Tags, from_main_rx: Receiver<BosunRequest>) -> Bosun {
let bosun_client = BosunClient::new(host);
Bosun {
queue: Vec::new(),
from_main_rx: from_main_rx,
bosun_client: bosun_client,
default_tags: default_tags.clone(),
hostname: hostname.to_string(),
}
}
pub fn spawn(mut self) -> JoinHandle<()> {
let timer = chan::tick(Duration::from_secs(TICK_INTERVAL_SEC));
thread::spawn(move || {
info!("Bosun thread started.");
let from_main_rx = self.from_main_rx;
loop {
chan_select! {
timer.recv() => {
let queue_len = self.queue.len() as f64 + 1f64;
self.queue.push(Sample::new(RS_COLLECTOR_STATS_SAMPLES_METRICNAME, queue_len));
debug!("I've been ticked. Current sample queue length is {:#?}. Sending data now.", queue_len);
for s in self.queue.drain(..) {
match send_sample_to_bosun(s, &self.bosun_client, &self.hostname, &self.default_tags) {
Ok(_) => {},
Err(err) => {
error!("Failed to send datum to Bosun, because {:?}", err);
}
}
}
},
from_main_rx.recv() -> msg => {
match msg {
Some(BosunRequest::Metadata(metadata)) => {
debug!("Received new metadata '{}'.", &metadata.metric);
let m = bosun_emitter::Metadata {
metric: &metadata.metric, rate: &metadata.rate,
unit: &metadata.unit, description: &metadata.description };
match self.bosun_client.emit_metadata(&m) {
Ok(_) => {},
Err(err) => {
error!("Failed to send metadata '{:?}' to Bosun, because {:?}", &m, err);
}
}
}
Some(BosunRequest::Sample(sample)) => {
debug!("Received new sample '{}'.", sample.time);
self.queue.push(sample);
}
Some(BosunRequest::Shutdown) => {
debug!("Received message to shut down.");
break
}
None => {
error!("Channel unexpectedly shut down.");
}
}
}
}
}
info!("Bosun thread finished.");
})
}
}
fn send_sample_to_bosun(mut s: Sample, bosun_client: &BosunClient, hostname: &str, default_tags: &Tags) -> EmitterResult {
let value = format!("{}", &s.value);
s.tags.insert("host".to_string(), hostname.to_string());
s.tags.extend(default_tags.clone());
let d = Datum {
metric: &s.metric, timestamp: s.time as i64, value: &value, tags: &s.tags };
trace!("Sending datum {:?} to Bosun.", &d);
bosun_client.emit_datum(&d)
}