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use diesel::connection::{Instrumentation, InstrumentationEvent};
use std::{cell::RefCell, collections::HashMap, time::Instant};
thread_local! {
static QUERY_PERF_TRACKER: RefCell<HashMap<String, Instant>> = RefCell::new(HashMap::new());
}
pub fn simple_logger() -> Option<Box<dyn Instrumentation>> {
Some(Box::new(|event: InstrumentationEvent<'_>| match event {
// TODO: Figure out where the invalid connection errors are coming from
// There seem to be some invalid errors when connecting to a SQLite database
// Until the cause of this is found and resolved, disable the Connection logging
// InstrumentationEvent::StartEstablishConnection {
// url,
// ..
// } => {
// debug!("Establishing connection: {url}")
// }
// InstrumentationEvent::FinishEstablishConnection {
// url,
// error,
// ..
// } => {
// if let Some(e) = error {
// error!("Error during establishing a connection with {url}: {e:?}")
// } else {
// debug!("Connection established: {url}")
// }
// }
InstrumentationEvent::StartQuery {
query,
..
} => {
let query_string = format!("{query:?}");
let start = Instant::now();
QUERY_PERF_TRACKER.with_borrow_mut(|map| {
map.insert(query_string, start);
});
}
InstrumentationEvent::FinishQuery {
query,
..
} => {
let query_string = format!("{query:?}");
QUERY_PERF_TRACKER.with_borrow_mut(|map| {
if let Some(start) = map.remove(&query_string) {
let duration = start.elapsed();
if duration.as_secs() >= 5 {
warn!("SLOW QUERY [{:.2}s]: {}", duration.as_secs_f32(), query_string);
} else if duration.as_secs() >= 1 {
info!("SLOW QUERY [{:.2}s]: {}", duration.as_secs_f32(), query_string);
} else {
debug!("QUERY [{:?}]: {}", duration, query_string);
}
}
});
}
_ => {}
}))
}