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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,3 @@ | ||
| pub(crate) use stats_collector::StatsCollector; | ||
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| mod stats_collector; |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,194 @@ | ||
| use std::sync::Arc; | ||
| use std::sync::Mutex; | ||
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| use diesel::r2d2::event::*; | ||
| use log::error; | ||
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| #[derive(Debug, Default)] | ||
| struct Stat { | ||
| total: u128, | ||
| micros_sum: u128, | ||
| max_micros: u128, | ||
| } | ||
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| impl Stat { | ||
| fn reset(&mut self) { | ||
| self.total = 0; | ||
| self.micros_sum = 0; | ||
| self.max_micros = 0; | ||
| } | ||
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| fn update(&mut self, micros: u128) { | ||
| self.total += 1; | ||
| self.micros_sum += micros; | ||
| self.max_micros = std::cmp::max(self.max_micros, micros) | ||
| } | ||
| } | ||
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| #[derive(Debug, Default)] | ||
| struct Inner { | ||
| checkin: Stat, | ||
| checkout: Stat, | ||
| release: Stat, | ||
| timeout: Stat, | ||
| } | ||
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| enum Update { | ||
| Checkin(u128), | ||
| Checkout(u128), | ||
| Release(u128), | ||
| Timeout(u128), | ||
| } | ||
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| impl Inner { | ||
| fn get_stats(&mut self) -> Stats { | ||
| let stats = Stats { | ||
| avg_checkin: (self.checkin.micros_sum as f64) / (self.checkin.total as f64), | ||
| avg_checkout: (self.checkout.micros_sum as f64) / (self.checkout.total as f64), | ||
| avg_release: (self.release.micros_sum as f64) / (self.release.total as f64), | ||
| avg_timeout: (self.timeout.micros_sum as f64) / (self.timeout.total as f64), | ||
| max_checkin: self.checkin.max_micros, | ||
| max_checkout: self.checkout.max_micros, | ||
| max_release: self.release.max_micros, | ||
| max_timeout: self.timeout.max_micros, | ||
| }; | ||
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| self.reset(); | ||
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| stats | ||
| } | ||
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| fn update(&mut self, update: Update) { | ||
| match update { | ||
| Update::Checkin(micros) => { | ||
| self.checkin.update(micros); | ||
| } | ||
| Update::Checkout(micros) => { | ||
| self.checkout.update(micros); | ||
| } | ||
| Update::Timeout(micros) => { | ||
| self.timeout.update(micros); | ||
| } | ||
| Update::Release(micros) => { | ||
| self.release.update(micros); | ||
| } | ||
| } | ||
| } | ||
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| fn reset(&mut self) { | ||
| self.checkin.reset(); | ||
| self.checkout.reset(); | ||
| self.release.reset(); | ||
| self.timeout.reset(); | ||
| } | ||
| } | ||
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| #[derive(Debug, Clone)] | ||
| pub struct Stats { | ||
| pub avg_checkin: f64, | ||
| pub avg_checkout: f64, | ||
| pub avg_release: f64, | ||
| pub avg_timeout: f64, | ||
| pub max_checkin: u128, | ||
| pub max_checkout: u128, | ||
| pub max_release: u128, | ||
| pub max_timeout: u128, | ||
| } | ||
|
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| #[derive(Debug, Clone)] | ||
| pub struct StatsCollector { | ||
| inner: Arc<Mutex<Inner>>, | ||
| } | ||
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| impl StatsCollector { | ||
| pub fn new() -> (Self, StatsTransmitter) { | ||
| let inner: Arc<Mutex<Inner>> = Default::default(); | ||
| let collector = Self { | ||
| inner: inner.clone(), | ||
| }; | ||
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| let (tx, rx) = crossbeam_channel::bounded(100); | ||
| let transmitter = StatsTransmitter { | ||
| inner: Arc::new(Mutex::new(StatsTransmitterInner(tx))), | ||
| }; | ||
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| std::thread::Builder::new() | ||
| .name("dbpool-stats-collector".to_string()) | ||
| .spawn(move || { | ||
| for update in rx { | ||
| inner | ||
| .lock() | ||
| .expect("Lock failed, poisoned mutex?") | ||
| .update(update); | ||
| } | ||
| }) | ||
| .expect("Failed to start dbpool-stats-collector thread"); | ||
|
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| (collector, transmitter) | ||
| } | ||
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| pub fn get_stats(&self) -> Stats { | ||
| let mut inner = self.inner.lock().expect("Lock failed, poisoned mutex?"); | ||
| inner.get_stats() | ||
| } | ||
| } | ||
|
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| #[derive(Debug)] | ||
| struct StatsTransmitterInner(crossbeam_channel::Sender<Update>); | ||
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| #[derive(Debug)] | ||
| pub struct StatsTransmitter { | ||
| inner: Arc<Mutex<StatsTransmitterInner>>, | ||
| } | ||
|
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| impl diesel::r2d2::HandleEvent for StatsTransmitter { | ||
| fn handle_checkin(&self, event: CheckinEvent) { | ||
| let micros = event.duration().as_micros(); | ||
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| let inner = self.inner.lock().expect("Lock failed, poisoned mutex?"); | ||
| if let Err(e) = inner.0.send(Update::Checkin(micros)) { | ||
| error!( | ||
| "Failed to send checkin micros in StatsTransmiiter, reason = {}", | ||
| e | ||
| ); | ||
| } | ||
| } | ||
|
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| fn handle_checkout(&self, event: CheckoutEvent) { | ||
| let micros = event.duration().as_micros(); | ||
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| let inner = self.inner.lock().expect("Lock failed, poisoned mutex?"); | ||
| if let Err(e) = inner.0.send(Update::Checkout(micros)) { | ||
| error!( | ||
| "Failed to send checkout micros in StatsTransmiiter, reason = {}", | ||
| e | ||
| ); | ||
| } | ||
| } | ||
|
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| fn handle_release(&self, event: ReleaseEvent) { | ||
| let micros = event.age().as_micros(); | ||
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| let inner = self.inner.lock().expect("Lock failed, poisoned mutex?"); | ||
| if let Err(e) = inner.0.send(Update::Release(micros)) { | ||
| error!( | ||
| "Failed to send checkout micros in StatsTransmiiter, reason = {}", | ||
| e | ||
| ); | ||
| } | ||
| } | ||
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| fn handle_timeout(&self, event: TimeoutEvent) { | ||
| let micros = event.timeout().as_micros(); | ||
|
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| let inner = self.inner.lock().expect("Lock failed, poisoned mutex?"); | ||
| if let Err(e) = inner.0.send(Update::Timeout(micros)) { | ||
| error!( | ||
| "Failed to send checkout micros in StatsTransmiiter, reason = {}", | ||
| e | ||
| ); | ||
| } | ||
| } | ||
|
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| fn handle_acquire(&self, _event: AcquireEvent) {} | ||
| } |
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