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handle the case of a queue of zero elements

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This commit is contained in:
Tamo
2024-03-26 19:04:39 +01:00
parent e7704f1fc1
commit 8127c9a115
2 changed files with 46 additions and 2 deletions
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11
meilisearch/src/search_queue.rs
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@ -47,14 +47,21 @@ impl SearchQueue {
loop {
tokio::select! {
search_request = receive_new_searches.recv() => {
// this unwrap is safe because we're sure the `SearchQueue` still lives somewhere in actix-web
let search_request = search_request.unwrap();
if searches_running < usize::from(parallelism) && queue.is_empty() {
searches_running += 1;
// if the search requests die it's not a hard error on our side
let _ = search_request.send(Permit { sender: sender.clone() });
continue;
}
if queue.len() >= capacity {
} else if capacity == 0 {
// in the very specific case where we have a capacity of zero
// we must refuse the request straight away without going through
// the queue stuff.
drop(search_request);
continue;
} else if queue.len() >= capacity {
let remove = rng.gen_range(0..queue.len());
let thing = queue.swap_remove(remove); // this will drop the channel and notify the search that it won't be processed
drop(thing);