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atproto made easy crates.io/crates/jacquard
atproto rust
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p = "crates/jacquard/src/jetstream/replay.rs"s = open(p).read()
# Trim the header to a maintainer-sized summary.old_head = s[: s.index("use std::collections::VecDeque;")]new_head = """//! Replay orchestration: archive backfill with cutover to the live//! `subscribeEvents` stream.//!//! Composes the plan loop, archive transport, `.jss` decoder, and the//! low-level live stream, and owns the cross-cutting behaviour none of//! them can: seq-floor dedupe at the archive->live seam, `CursorTooOld`//! recovery by replanning from the last delivered seq, per-row filter//! re-application (plans over-include), and `429` backoff.//!//! Delivery is at-least-once; handlers should be idempotent, keyed on the//! at:// URI (and rev for commits). Cursor persistence is caller-owned://! `ReplayItem::last_seq` is the checkpoint to store.
"""s = new_head + s[s.index("use std::collections::VecDeque;"):]
# Restructure next(): move phases out during dispatch (avoids &mut self# conflicts), restore before continues/returns.start = s.index(" /// Receive the next event")end = s.index(" async fn run_plan")new_next = """ /// Receive the next event, or `None` when the run is complete. pub async fn next(&mut self) -> Result<Option<ReplayItem>, ReplayError<C::Error>> { loop { // Phases move out during dispatch: several arms need `&mut // self` (network calls) while holding the phase's contents. let phase = core::mem::replace(&mut self.phase, Phase::Done); self.phase = match phase { Phase::Plan => { self.run_plan().await?; continue; } Phase::Archive { mut segments, sealed_tip_seq, mut rows, } => { if let Some(row) = rows.pop_front() { self.phase = Phase::Archive { segments, sealed_tip_seq, rows, }; if let Some(item) = self.row_to_item(row)? { return Ok(Some(item)); } continue; } if segments.is_empty() { self.cutover(sealed_tip_seq).await?; continue; } let take = self.options.download_concurrency.min(segments.len()); let batch: Vec<Segment<SmolStr>> = segments.drain(..take).collect(); for segment in batch.iter() { rows.extend(self.download_segment(segment).await?); } self.phase = Phase::Archive { segments, sealed_tip_seq, rows, }; continue; } Phase::Live { mut stream } => { let message = match stream.next().await { Ok(m) => m, Err(LiveError::Closed) => { // The low-level stream is single-connection by // design; a close during replay is recoverable // by replanning from the floor. Pure-live runs // treat closure as the end of the stream. if matches!(self.mode, ReplayMode::Replay { .. }) { self.replans += 1; if self.replans > self.options.max_replans { return Err(ReplayError::ReplanExhausted); } Phase::Plan } else { return Ok(None); } } Err(e) => return Err(e.into()), }; let seq = message_seq(message); if let Some(seq) = seq { if seq <= self.floor { self.phase = Phase::Live { stream }; continue; } self.floor = self.floor.max(seq); } self.phase = Phase::Live { stream }; return Ok(Some(ReplayItem { message, last_seq: seq, })); } Phase::Done => return Ok(None), }; } }
"""s = s[:start] + new_next + s[end:]
# Rework cutover: inline CursorTooOld replan, terminal otherwise.start = s.index(" /// Establish the live stream at the seam.")end = s.index(" async fn establish_live")new_cutover = """ /// Establish the live stream at the seam. `CursorTooOld` re-enters /// the plan loop from the last delivered seq; other handshake /// rejections are terminal. async fn cutover(&mut self, cursor: i64) -> Result<(), ReplayError<C::Error>> { let options = LiveOptions { cursor: (cursor > i64::MIN).then_some(cursor), max_message_size_bytes: None, }; let base = self.client.base_uri().await; match self.establish_live(&base, options).await { Ok(stream) => { self.phase = Phase::Live { stream }; Ok(()) } Err(LiveError::Handshake(h)) => { use jacquard_api::network_bsky::jetstream::subscribe_events::SubscribeEventsError; match h.error { SubscribeEventsError::CursorTooOld(_) => { // The cursor fell below the retention floor; // backfill from the last delivered seq. self.replans += 1; if self.replans > self.options.max_replans { return Err(ReplayError::ReplanExhausted); } let after = self.checkpoint(); let plan = plan_snapshot(&self.client, &self.filters, after).await?; self.phase = Phase::Archive { segments: plan.segments.into(), sealed_tip_seq: plan.sealed_tip_seq, rows: VecDeque::new(), }; Ok(()) } error => Err(LiveError::Handshake(super::live::HandshakeError { error, ..h }) .into()), } } Err(e) => Err(e.into()), } }
"""s = s[:start] + new_cutover + s[end:]
# The old connect_live helper is gone; delete it if still present.start = s.find(" async fn connect_live(")if start != -1: end = s.index(" async fn establish_live") s = s[:start] + s[end:]
open(p, "w").write(s)print("patched")