mirror of
https://github.com/Syfaro/bkapi.git
synced 2024-11-21 14:34:08 +00:00
Code cleanup.
This commit is contained in:
parent
876a6bee55
commit
45ecb8e5ad
@ -11,7 +11,7 @@ use futures::StreamExt;
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use opentelemetry::KeyValue;
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use opentelemetry::KeyValue;
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use prometheus::{Encoder, TextEncoder};
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use prometheus::{Encoder, TextEncoder};
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use sqlx::postgres::PgPoolOptions;
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use sqlx::postgres::PgPoolOptions;
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use tokio::sync::RwLock;
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use tracing::Instrument;
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use tracing_subscriber::layer::SubscriberExt;
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use tracing_subscriber::layer::SubscriberExt;
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use tracing_unwrap::ResultExt;
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use tracing_unwrap::ResultExt;
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@ -20,8 +20,6 @@ mod tree;
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lazy_static::lazy_static! {
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lazy_static::lazy_static! {
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static ref HTTP_REQUEST_COUNT: prometheus::CounterVec = prometheus::register_counter_vec!("http_requests_total", "Number of HTTP requests", &["http_route", "http_method", "http_status_code"]).unwrap();
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static ref HTTP_REQUEST_COUNT: prometheus::CounterVec = prometheus::register_counter_vec!("http_requests_total", "Number of HTTP requests", &["http_route", "http_method", "http_status_code"]).unwrap();
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static ref HTTP_REQUEST_DURATION: prometheus::HistogramVec = prometheus::register_histogram_vec!("http_request_duration_seconds", "Duration of HTTP requests", &["http_route", "http_method", "http_status_code"]).unwrap();
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static ref HTTP_REQUEST_DURATION: prometheus::HistogramVec = prometheus::register_histogram_vec!("http_request_duration_seconds", "Duration of HTTP requests", &["http_route", "http_method", "http_status_code"]).unwrap();
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static ref TREE_DURATION: prometheus::HistogramVec = prometheus::register_histogram_vec!("bkapi_tree_duration_seconds", "Duration of tree search time", &["distance"]).unwrap();
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}
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}
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#[derive(thiserror::Error, Debug)]
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#[derive(thiserror::Error, Debug)]
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@ -83,7 +81,7 @@ async fn main() {
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tracing::info!("starting bkapi");
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tracing::info!("starting bkapi");
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let tree: tree::Tree = Arc::new(RwLock::new(bk_tree::BKTree::new(tree::Hamming)));
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let tree = tree::Tree::new();
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tracing::trace!("connecting to postgres");
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tracing::trace!("connecting to postgres");
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let pool = PgPoolOptions::new()
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let pool = PgPoolOptions::new()
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@ -235,14 +233,14 @@ async fn health() -> impl Responder {
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}
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}
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#[get("/metrics")]
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#[get("/metrics")]
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async fn metrics() -> Result<HttpResponse, std::convert::Infallible> {
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async fn metrics() -> HttpResponse {
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let mut buffer = Vec::new();
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let mut buffer = Vec::new();
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let encoder = TextEncoder::new();
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let encoder = TextEncoder::new();
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let metric_families = prometheus::gather();
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let metric_families = prometheus::gather();
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encoder.encode(&metric_families, &mut buffer).unwrap();
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encoder.encode(&metric_families, &mut buffer).unwrap();
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Ok(HttpResponse::Ok().body(buffer))
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HttpResponse::Ok().body(buffer)
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}
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}
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#[derive(Debug, serde::Deserialize)]
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#[derive(Debug, serde::Deserialize)]
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@ -251,18 +249,12 @@ struct Query {
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distance: u32,
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distance: u32,
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}
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}
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#[derive(serde::Serialize)]
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struct HashDistance {
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hash: i64,
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distance: u32,
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}
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#[derive(serde::Serialize)]
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#[derive(serde::Serialize)]
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struct SearchResponse {
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struct SearchResponse {
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hash: i64,
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hash: i64,
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distance: u32,
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distance: u32,
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hashes: Vec<HashDistance>,
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hashes: Vec<tree::HashDistance>,
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}
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}
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#[get("/search")]
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#[get("/search")]
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@ -275,9 +267,10 @@ async fn search(
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let Query { hash, distance } = query.0;
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let Query { hash, distance } = query.0;
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let distance = distance.clamp(0, config.max_distance);
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let distance = distance.clamp(0, config.max_distance);
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let tree = tree.read().await;
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let hashes = tree
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let hashes = search_tree(&tree, hash, distance);
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.find([tree::HashDistance { hash, distance }])
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drop(tree);
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.await
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.remove(0);
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let resp = SearchResponse {
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let resp = SearchResponse {
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hash,
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hash,
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@ -294,6 +287,7 @@ struct SearchPayload {
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distance: u32,
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distance: u32,
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}
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}
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#[tracing::instrument(skip(client, tree, config))]
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async fn search_nats(
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async fn search_nats(
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client: async_nats::Client,
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client: async_nats::Client,
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tree: tree::Tree,
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tree: tree::Tree,
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@ -301,6 +295,8 @@ async fn search_nats(
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) -> Result<(), Error> {
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) -> Result<(), Error> {
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tracing::info!("subscribing to searches");
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tracing::info!("subscribing to searches");
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let client = Arc::new(client);
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let mut sub = client
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let mut sub = client
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.queue_subscribe("bkapi.search".to_string(), "bkapi-search".to_string())
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.queue_subscribe("bkapi.search".to_string(), "bkapi-search".to_string())
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.await?;
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.await?;
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@ -311,7 +307,7 @@ async fn search_nats(
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let reply = match message.reply {
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let reply = match message.reply {
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Some(reply) => reply,
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Some(reply) => reply,
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None => {
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None => {
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tracing::warn!("message had no reply subject");
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tracing::warn!("message had no reply subject, skipping");
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continue;
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continue;
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}
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}
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};
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};
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@ -320,51 +316,26 @@ async fn search_nats(
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serde_json::from_slice(&message.payload).map_err(Error::Data)?;
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serde_json::from_slice(&message.payload).map_err(Error::Data)?;
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let tree = tree.clone();
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let tree = tree.clone();
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let config = config.clone();
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let client = client.clone();
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let client = client.clone();
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let max_distance = config.max_distance;
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tokio::task::spawn(async move {
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tokio::task::spawn(
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let tree = tree.read().await;
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async move {
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let hashes = payloads.into_iter().map(|payload| tree::HashDistance {
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hash: payload.hash,
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distance: payload.distance.clamp(0, max_distance),
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});
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let results: Vec<_> = payloads
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let results = tree.find(hashes).await;
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.into_iter()
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.map(|payload| (payload.hash, payload.distance.clamp(0, config.max_distance)))
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.map(|(hash, distance)| search_tree(&tree, hash, distance))
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.collect();
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drop(tree);
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client
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.publish(reply, serde_json::to_vec(&results).unwrap_or_log().into())
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client
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.await
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.publish(reply, serde_json::to_vec(&results).unwrap_or_log().into())
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.unwrap_or_log();
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.await
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}
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.unwrap_or_log();
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.in_current_span(),
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});
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);
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}
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}
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Ok(())
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Ok(())
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}
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}
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#[tracing::instrument(skip(tree))]
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fn search_tree(
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tree: &bk_tree::BKTree<tree::Node, tree::Hamming>,
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hash: i64,
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distance: u32,
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) -> Vec<HashDistance> {
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tracing::debug!("searching tree");
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let duration = TREE_DURATION
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.with_label_values(&[&distance.to_string()])
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.start_timer();
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let results: Vec<_> = tree
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.find(&hash.into(), distance)
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.into_iter()
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.map(|item| HashDistance {
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distance: item.0,
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hash: (*item.1).into(),
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})
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.collect();
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let time = duration.stop_and_record();
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tracing::info!(time, results = results.len(), "found results");
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results
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}
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@ -1,5 +1,6 @@
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use std::sync::Arc;
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use std::sync::Arc;
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use bk_tree::BKTree;
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use futures::TryStreamExt;
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use futures::TryStreamExt;
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use sqlx::{postgres::PgListener, Pool, Postgres, Row};
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use sqlx::{postgres::PgListener, Pool, Postgres, Row};
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use tokio::sync::RwLock;
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use tokio::sync::RwLock;
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@ -9,12 +10,121 @@ use crate::{Config, Error};
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lazy_static::lazy_static! {
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lazy_static::lazy_static! {
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static ref TREE_ADD_DURATION: prometheus::Histogram = prometheus::register_histogram!("bkapi_tree_add_duration_seconds", "Duration to add new item to tree").unwrap();
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static ref TREE_ADD_DURATION: prometheus::Histogram = prometheus::register_histogram!("bkapi_tree_add_duration_seconds", "Duration to add new item to tree").unwrap();
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static ref TREE_DURATION: prometheus::HistogramVec = prometheus::register_histogram_vec!("bkapi_tree_duration_seconds", "Duration of tree search time", &["distance"]).unwrap();
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}
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}
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pub(crate) type Tree = Arc<RwLock<bk_tree::BKTree<Node, Hamming>>>;
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/// A BKTree wrapper to cover common operations.
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#[derive(Clone)]
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pub struct Tree {
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tree: Arc<RwLock<BKTree<Node, Hamming>>>,
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}
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/// A hash and distance pair. May be used for searching or in search results.
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#[derive(serde::Serialize)]
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pub struct HashDistance {
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pub hash: i64,
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pub distance: u32,
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}
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impl Tree {
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/// Create an empty tree.
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pub fn new() -> Self {
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Self {
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tree: Arc::new(RwLock::new(BKTree::new(Hamming))),
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}
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}
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/// Replace tree contents with the results of a SQL query.
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///
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/// The tree is only replaced after it finishes loading, leaving stale/empty
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/// data available while running.
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pub(crate) async fn reload(&self, pool: &sqlx::PgPool, query: &str) -> Result<(), Error> {
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let mut new_tree = BKTree::new(Hamming);
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let mut rows = sqlx::query(query).fetch(pool);
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let start = std::time::Instant::now();
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let mut count = 0;
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while let Some(row) = rows.try_next().await.map_err(Error::LoadingRow)? {
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let node: Node = row.get::<i64, _>(0).into();
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if new_tree.find_exact(&node).is_none() {
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new_tree.add(node);
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}
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count += 1;
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if count % 250_000 == 0 {
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tracing::debug!(count, "loaded more rows");
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}
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}
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let dur = std::time::Instant::now().duration_since(start);
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tracing::info!(count, "completed loading rows in {:?}", dur);
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let mut tree = self.tree.write().await;
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*tree = new_tree;
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Ok(())
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}
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/// Add a hash to the tree, returning if it already existed.
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#[tracing::instrument(skip(self))]
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pub async fn add(&self, hash: i64) -> bool {
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let node = Node::from(hash);
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let is_new_hash = {
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let tree = self.tree.read().await;
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tree.find_exact(&node).is_none()
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};
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if is_new_hash {
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let mut tree = self.tree.write().await;
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tree.add(node);
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}
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tracing::info!(is_new_hash, "added hash");
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is_new_hash
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}
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/// Attempt to find any number of hashes within the tree.
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pub async fn find<H>(&self, hashes: H) -> Vec<Vec<HashDistance>>
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where
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H: IntoIterator<Item = HashDistance>,
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{
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let tree = self.tree.read().await;
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hashes
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.into_iter()
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.map(|HashDistance { hash, distance }| Self::search(&tree, hash, distance))
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.collect()
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}
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/// Search a read-locked tree for a hash with a given distance.
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#[tracing::instrument(skip(tree))]
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fn search(tree: &BKTree<Node, Hamming>, hash: i64, distance: u32) -> Vec<HashDistance> {
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tracing::debug!("searching tree");
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let duration = TREE_DURATION
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.with_label_values(&[&distance.to_string()])
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.start_timer();
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let results: Vec<_> = tree
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.find(&hash.into(), distance)
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.into_iter()
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.map(|item| HashDistance {
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distance: item.0,
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hash: (*item.1).into(),
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})
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.collect();
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let time = duration.stop_and_record();
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tracing::info!(time, results = results.len(), "found results");
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results
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}
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}
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/// A hamming distance metric.
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/// A hamming distance metric.
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pub(crate) struct Hamming;
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struct Hamming;
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impl bk_tree::Metric<Node> for Hamming {
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impl bk_tree::Metric<Node> for Hamming {
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fn distance(&self, a: &Node, b: &Node) -> u32 {
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fn distance(&self, a: &Node, b: &Node) -> u32 {
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@ -29,7 +139,7 @@ impl bk_tree::Metric<Node> for Hamming {
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/// A value of a node in the BK tree.
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/// A value of a node in the BK tree.
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#[derive(Debug, Clone, Copy, PartialEq, Eq)]
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#[derive(Debug, Clone, Copy, PartialEq, Eq)]
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pub(crate) struct Node([u8; 8]);
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struct Node([u8; 8]);
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impl From<i64> for Node {
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impl From<i64> for Node {
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fn from(num: i64) -> Self {
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fn from(num: i64) -> Self {
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@ -43,50 +153,14 @@ impl From<Node> for i64 {
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}
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}
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}
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}
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/// Create a new BK tree and pull in all hashes from provided query.
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/// A payload for a new hash to add to the index from Postgres or NATS.
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///
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/// This must be called after you have started a listener, otherwise items may
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/// be lost.
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async fn create_tree(
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conn: &Pool<Postgres>,
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query: &str,
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) -> Result<bk_tree::BKTree<Node, Hamming>, Error> {
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tracing::warn!("creating new tree");
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let mut tree = bk_tree::BKTree::new(Hamming);
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let mut rows = sqlx::query(query).fetch(conn);
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let mut count = 0;
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let start = std::time::Instant::now();
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while let Some(row) = rows.try_next().await.map_err(Error::LoadingRow)? {
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let node: Node = row.get::<i64, _>(0).into();
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if tree.find_exact(&node).is_none() {
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tree.add(node);
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}
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count += 1;
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if count % 250_000 == 0 {
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tracing::debug!(count, "loaded more rows");
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}
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}
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let dur = std::time::Instant::now().duration_since(start);
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tracing::info!(count, "completed loading rows in {:?}", dur);
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Ok(tree)
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}
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#[derive(serde::Deserialize)]
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#[derive(serde::Deserialize)]
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struct Payload {
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struct Payload {
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hash: i64,
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hash: i64,
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}
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}
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/// Listen for incoming payloads.
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/// Listen for incoming payloads from Postgres.
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///
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#[tracing::instrument(skip(conn, subscription, query, tree, initial))]
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/// This will create a new tree to ensure all items are present. It will also
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/// automatically recreate trees as needed if the database connection is lost.
|
|
||||||
pub(crate) async fn listen_for_payloads_db(
|
pub(crate) async fn listen_for_payloads_db(
|
||||||
conn: Pool<Postgres>,
|
conn: Pool<Postgres>,
|
||||||
subscription: String,
|
subscription: String,
|
||||||
@ -105,11 +179,7 @@ pub(crate) async fn listen_for_payloads_db(
|
|||||||
.await
|
.await
|
||||||
.map_err(Error::Listener)?;
|
.map_err(Error::Listener)?;
|
||||||
|
|
||||||
let new_tree = create_tree(&conn, &query).await?;
|
tree.reload(&conn, &query).await?;
|
||||||
{
|
|
||||||
let mut tree = tree.write().await;
|
|
||||||
*tree = new_tree;
|
|
||||||
}
|
|
||||||
|
|
||||||
if let Some(initial) = initial.take() {
|
if let Some(initial) = initial.take() {
|
||||||
initial
|
initial
|
||||||
@ -127,6 +197,8 @@ pub(crate) async fn listen_for_payloads_db(
|
|||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
|
/// Listen for incoming payloads from NATS.
|
||||||
|
#[tracing::instrument(skip(config, pool, client, tree, initial))]
|
||||||
pub(crate) async fn listen_for_payloads_nats(
|
pub(crate) async fn listen_for_payloads_nats(
|
||||||
config: Config,
|
config: Config,
|
||||||
pool: sqlx::PgPool,
|
pool: sqlx::PgPool,
|
||||||
@ -134,14 +206,12 @@ pub(crate) async fn listen_for_payloads_nats(
|
|||||||
tree: Tree,
|
tree: Tree,
|
||||||
initial: futures::channel::oneshot::Sender<()>,
|
initial: futures::channel::oneshot::Sender<()>,
|
||||||
) -> Result<(), Error> {
|
) -> Result<(), Error> {
|
||||||
static STREAM_NAME: &str = "bkapi-hashes";
|
|
||||||
|
|
||||||
let jetstream = async_nats::jetstream::new(client);
|
let jetstream = async_nats::jetstream::new(client);
|
||||||
let mut initial = Some(initial);
|
let mut initial = Some(initial);
|
||||||
|
|
||||||
let stream = jetstream
|
let stream = jetstream
|
||||||
.get_or_create_stream(async_nats::jetstream::stream::Config {
|
.get_or_create_stream(async_nats::jetstream::stream::Config {
|
||||||
name: STREAM_NAME.to_string(),
|
name: "bkapi-hashes".to_string(),
|
||||||
subjects: vec!["bkapi.add".to_string()],
|
subjects: vec!["bkapi.add".to_string()],
|
||||||
max_age: std::time::Duration::from_secs(60 * 60 * 24),
|
max_age: std::time::Duration::from_secs(60 * 60 * 24),
|
||||||
retention: async_nats::jetstream::stream::RetentionPolicy::Interest,
|
retention: async_nats::jetstream::stream::RetentionPolicy::Interest,
|
||||||
@ -159,11 +229,7 @@ pub(crate) async fn listen_for_payloads_nats(
|
|||||||
)
|
)
|
||||||
.await?;
|
.await?;
|
||||||
|
|
||||||
let new_tree = create_tree(&pool, &config.database_query).await?;
|
tree.reload(&pool, &config.database_query).await?;
|
||||||
{
|
|
||||||
let mut tree = tree.write().await;
|
|
||||||
*tree = new_tree;
|
|
||||||
}
|
|
||||||
|
|
||||||
if let Some(initial) = initial.take() {
|
if let Some(initial) = initial.take() {
|
||||||
initial
|
initial
|
||||||
@ -184,25 +250,13 @@ pub(crate) async fn listen_for_payloads_nats(
|
|||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
|
/// Process a payload from Postgres or NATS and add to the tree.
|
||||||
async fn process_payload(tree: &Tree, payload: &[u8]) -> Result<(), Error> {
|
async fn process_payload(tree: &Tree, payload: &[u8]) -> Result<(), Error> {
|
||||||
let payload: Payload = serde_json::from_slice(payload).map_err(Error::Data)?;
|
let payload: Payload = serde_json::from_slice(payload).map_err(Error::Data)?;
|
||||||
tracing::trace!("got hash: {}", payload.hash);
|
tracing::trace!("got hash: {}", payload.hash);
|
||||||
|
|
||||||
let node: Node = payload.hash.into();
|
|
||||||
|
|
||||||
let _timer = TREE_ADD_DURATION.start_timer();
|
let _timer = TREE_ADD_DURATION.start_timer();
|
||||||
|
tree.add(payload.hash).await;
|
||||||
let is_new_hash = {
|
|
||||||
let tree = tree.read().await;
|
|
||||||
tree.find_exact(&node).is_none()
|
|
||||||
};
|
|
||||||
|
|
||||||
if is_new_hash {
|
|
||||||
let mut tree = tree.write().await;
|
|
||||||
tree.add(node);
|
|
||||||
}
|
|
||||||
|
|
||||||
tracing::debug!(hash = payload.hash, is_new_hash, "processed incoming hash");
|
|
||||||
|
|
||||||
Ok(())
|
Ok(())
|
||||||
}
|
}
|
||||||
|
Loading…
Reference in New Issue
Block a user