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//! Records stats about requests
use std::time::Duration;
use lsp_server::RequestId;
#[derive(Debug)]
pub(crate) struct RequestMetrics {
pub(crate) id: RequestId,
pub(crate) method: String,
pub(crate) duration: Duration,
}
const N_COMPLETED_REQUESTS: usize = 10;
#[derive(Debug, Default)]
pub(crate) struct LatestRequests {
// hand-rolling VecDeque here to print things in a nicer way
buf: [Option<RequestMetrics>; N_COMPLETED_REQUESTS],
idx: usize,
}
impl LatestRequests {
pub(crate) fn record(&mut self, request: RequestMetrics) {
// special case: don't track status request itself
if request.method == "rust-analyzer/analyzerStatus" {
return;
}
let idx = self.idx;
self.buf[idx] = Some(request);
self.idx = (idx + 1) % N_COMPLETED_REQUESTS;
}
pub(crate) fn iter(&self) -> impl Iterator<Item = (bool, &RequestMetrics)> {
let idx = self.idx;
self.buf.iter().enumerate().filter_map(move |(i, req)| Some((i == idx, req.as_ref()?)))
}
}
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