98f9570547
reference runtime state for default option initialization Signed-off-by: Jason Volk <jason@zemos.net>
85 lines
2 KiB
Rust
85 lines
2 KiB
Rust
use std::{convert::AsRef, fmt::Debug, sync::Arc};
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use conduwuit::{implement, Result};
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use futures::{FutureExt, Stream, StreamExt, TryFutureExt, TryStreamExt};
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use rocksdb::Direction;
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use serde::{Deserialize, Serialize};
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use super::rev_stream_from::is_cached;
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use crate::{
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keyval::{result_deserialize_key, serialize_key, Key},
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stream,
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};
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#[implement(super::Map)]
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pub fn rev_keys_from<'a, K, P>(
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self: &'a Arc<Self>,
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from: &P,
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) -> impl Stream<Item = Result<Key<'_, K>>> + Send
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where
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P: Serialize + ?Sized + Debug,
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K: Deserialize<'a> + Send,
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{
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self.rev_keys_from_raw(from)
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.map(result_deserialize_key::<K>)
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}
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#[implement(super::Map)]
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#[tracing::instrument(skip(self), level = "trace")]
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pub fn rev_keys_from_raw<P>(
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self: &Arc<Self>,
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from: &P,
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) -> impl Stream<Item = Result<Key<'_>>> + Send
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where
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P: Serialize + ?Sized + Debug,
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{
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let key = serialize_key(from).expect("failed to serialize query key");
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self.rev_raw_keys_from(&key)
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}
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#[implement(super::Map)]
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pub fn rev_keys_raw_from<'a, K, P>(
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self: &'a Arc<Self>,
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from: &P,
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) -> impl Stream<Item = Result<Key<'_, K>>> + Send
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where
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P: AsRef<[u8]> + ?Sized + Debug + Sync,
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K: Deserialize<'a> + Send,
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{
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self.rev_raw_keys_from(from)
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.map(result_deserialize_key::<K>)
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}
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#[implement(super::Map)]
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#[tracing::instrument(skip(self, from), fields(%self), level = "trace")]
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pub fn rev_raw_keys_from<P>(
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self: &Arc<Self>,
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from: &P,
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) -> impl Stream<Item = Result<Key<'_>>> + Send
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where
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P: AsRef<[u8]> + ?Sized + Debug,
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{
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use crate::pool::Seek;
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let opts = super::iter_options_default(&self.db);
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let state = stream::State::new(self, opts);
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if is_cached(self, from) {
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return stream::KeysRev::<'_>::from(state.init_rev(from.as_ref().into())).boxed();
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}
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let seek = Seek {
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map: self.clone(),
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dir: Direction::Reverse,
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key: Some(from.as_ref().into()),
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state: crate::pool::into_send_seek(state),
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res: None,
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};
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self.db
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.pool
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.execute_iter(seek)
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.ok_into::<stream::KeysRev<'_>>()
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.into_stream()
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.try_flatten()
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.boxed()
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}
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