Parakeet is a Rust-based Bluesky AppServer aiming to implement most of the functionality required to support the Bluesky client
appview
atproto
bluesky
rust
appserver
fix(consumer): use a mutex when checking status to stop a race
+23
-1
+23
-1
crates/consumer/src/backfill/mod.rs
+23
-1
crates/consumer/src/backfill/mod.rs
···
13
13
use redis::aio::MultiplexedConnection;
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14
use redis::AsyncTypedCommands;
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15
use reqwest::Client;
16
+
use std::collections::HashSet;
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use std::path::PathBuf;
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use std::str::FromStr;
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use std::sync::Arc;
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use std::time::Duration;
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use tokio::sync::watch::Receiver as WatchReceiver;
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-
use tokio::sync::Semaphore;
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+
use tokio::sync::{Mutex, Semaphore};
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use tokio_util::task::TaskTracker;
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24
use tracing::instrument;
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25
···
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33
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#[derive(Clone)]
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pub struct BackfillManagerInner {
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+
// we don't need to store anything, just ensure only one thread in the status check at a time
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+
status_lookup_lock: Arc<Mutex<HashSet<String>>>,
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38
index_client: Option<parakeet_index::Client>,
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39
tmp_dir: PathBuf,
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40
resolver: JacquardResolver,
···
57
60
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61
let client = Client::builder().brotli(true).build()?;
59
62
63
+
let current_tasks = Arc::new(Mutex::new(HashSet::new()));
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+
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Ok(BackfillManager {
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66
pool,
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redis,
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68
semaphore,
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inner: BackfillManagerInner {
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+
status_lookup_lock: current_tasks,
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71
index_client,
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72
tmp_dir: PathBuf::from_str(&opts.download_tmp_dir)?,
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73
resolver,
···
131
137
mut inner: BackfillManagerInner,
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138
did: &str,
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139
) -> eyre::Result<()> {
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+
let mut l = inner.status_lookup_lock.lock().await;
141
+
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142
// has the repo already been downloaded?
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+
if l.contains(did) {
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+
tracing::info!("skipping duplicate repo {did}");
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+
return Ok(());
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+
} else {
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+
l.insert(did.to_string());
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+
}
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+
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150
match db::actor_get_statuses(conn, did).await {
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151
Ok(Some((_, state))) => {
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152
if state == ActorSyncState::Synced || state == ActorSyncState::Processing {
···
153
168
&[&did],
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169
)
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170
.await?;
171
+
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+
drop(l);
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173
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let jd = Did::raw(did);
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let (pds, handle) = match utils::resolve_service(&inner.resolver, &jd).await {
···
208
225
db::actor_set_sync_status(conn, did, ActorSyncState::Dirty, Utc::now()).await?;
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226
db::backfill_job_write(conn, did, "failed.write").await?;
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227
}
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+
}
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+
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+
{
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+
let mut l = inner.status_lookup_lock.lock().await;
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+
l.remove(did);
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233
}
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Ok(())