continuwuity/src/database/map/rev_stream.rs
Tom Foster b5a2e49ae4 fix: Resolve Clippy CI failures from elided lifetime warnings
The latest Rust nightly compiler (2025-08-27) introduced the
elided-named-lifetimes lint which causes Clippy CI checks to fail
when an elided lifetime ('_) resolves to a named lifetime that's
already in scope.

This commit fixes the Clippy warnings by:
- Making lifetime relationships explicit where 'a is already in scope
- Keeping elided lifetimes ('_) in functions without explicit
  lifetime parameters
- Ensuring proper lifetime handling in the database pool module

Affected files (17 total):
- Database map modules: Handle, Key, and KeyVal references in get,
  qry, keys, and stream operations
- Database pool module: into_recv_seek function

This change resolves the CI build failures without changing any
functionality, ensuring the codebase remains compatible with the
latest nightly Clippy checks.
2025-08-28 21:13:19 +01:00

73 lines
1.7 KiB
Rust

use std::sync::Arc;
use conduwuit::{Result, implement};
use futures::{FutureExt, Stream, StreamExt, TryFutureExt, TryStreamExt};
use rocksdb::Direction;
use serde::Deserialize;
use tokio::task;
use crate::{keyval, keyval::KeyVal, stream};
/// Iterate key-value entries in the map from the end.
///
/// - Result is deserialized
#[implement(super::Map)]
pub fn rev_stream<'a, K, V>(
self: &'a Arc<Self>,
) -> impl Stream<Item = Result<KeyVal<'a, K, V>>> + Send
where
K: Deserialize<'a> + Send,
V: Deserialize<'a> + Send,
{
self.rev_raw_stream()
.map(keyval::result_deserialize::<K, V>)
}
/// Iterate key-value entries in the map from the end.
///
/// - Result is raw
#[implement(super::Map)]
#[tracing::instrument(skip(self), fields(%self), level = "trace")]
pub fn rev_raw_stream(self: &Arc<Self>) -> impl Stream<Item = Result<KeyVal<'_>>> + Send {
use crate::pool::Seek;
let opts = super::iter_options_default(&self.db);
let state = stream::State::new(self, opts);
if is_cached(self) {
let state = state.init_rev(None);
return task::consume_budget()
.map(move |()| stream::ItemsRev::<'_>::from(state))
.into_stream()
.flatten()
.boxed();
}
let seek = Seek {
map: self.clone(),
dir: Direction::Reverse,
state: crate::pool::into_send_seek(state),
key: None,
res: None,
};
self.db
.pool
.execute_iter(seek)
.ok_into::<stream::ItemsRev<'_>>()
.into_stream()
.try_flatten()
.boxed()
}
#[tracing::instrument(
name = "cached",
level = "trace",
skip_all,
fields(%map),
)]
pub(super) fn is_cached(map: &Arc<super::Map>) -> bool {
let opts = super::cache_iter_options_default(&map.db);
let state = stream::State::new(map, opts).init_rev(None);
!state.is_incomplete()
}