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-rw-r--r--src/bayou.rs68
1 files changed, 30 insertions, 38 deletions
diff --git a/src/bayou.rs b/src/bayou.rs
index 14f9728..1c157e6 100644
--- a/src/bayou.rs
+++ b/src/bayou.rs
@@ -2,7 +2,7 @@ use std::sync::{Arc, Weak};
use std::time::{Duration, Instant};
use anyhow::{anyhow, bail, Result};
-use log::{debug, error, info};
+use log::error;
use rand::prelude::*;
use serde::{Deserialize, Serialize};
use tokio::sync::{watch, Notify};
@@ -84,21 +84,21 @@ impl<S: BayouState> Bayou<S> {
// 1. List checkpoints
let checkpoints = self.list_checkpoints().await?;
- debug!("(sync) listed checkpoints: {:?}", checkpoints);
+ tracing::debug!("(sync) listed checkpoints: {:?}", checkpoints);
// 2. Load last checkpoint if different from currently used one
let checkpoint = if let Some((ts, key)) = checkpoints.last() {
if *ts == self.checkpoint.0 {
(*ts, None)
} else {
- debug!("(sync) loading checkpoint: {}", key);
+ tracing::debug!("(sync) loading checkpoint: {}", key);
let buf = self
.storage
.blob_fetch(&storage::BlobRef(key.to_string()))
.await?
.value;
- debug!("(sync) checkpoint body length: {}", buf.len());
+ tracing::debug!("(sync) checkpoint body length: {}", buf.len());
let ck = open_deserialize::<S>(&buf, &self.key)?;
(*ts, Some(ck))
@@ -112,7 +112,7 @@ impl<S: BayouState> Bayou<S> {
}
if let Some(ck) = checkpoint.1 {
- debug!(
+ tracing::debug!(
"(sync) updating checkpoint to loaded state at {:?}",
checkpoint.0
);
@@ -127,7 +127,7 @@ impl<S: BayouState> Bayou<S> {
// 3. List all operations starting from checkpoint
let ts_ser = self.checkpoint.0.to_string();
- debug!("(sync) looking up operations starting at {}", ts_ser);
+ tracing::debug!("(sync) looking up operations starting at {}", ts_ser);
let ops_map = self
.storage
.row_fetch(&storage::Selector::Range {
@@ -161,7 +161,7 @@ impl<S: BayouState> Bayou<S> {
}
}
ops.sort_by_key(|(ts, _)| *ts);
- debug!("(sync) {} operations", ops.len());
+ tracing::debug!("(sync) {} operations", ops.len());
if ops.len() < self.history.len() {
bail!("Some operations have disappeared from storage!");
@@ -238,20 +238,8 @@ impl<S: BayouState> Bayou<S> {
Ok(())
}
- pub async fn idle_sync(&mut self) -> Result<()> {
- tracing::debug!("start idle_sync");
- loop {
- tracing::trace!("idle_sync loop");
- let fut_notif = self.watch.learnt_remote_update.notified();
-
- if self.last_sync_watch_ct != *self.watch.rx.borrow() {
- break
- }
- fut_notif.await;
- }
- tracing::trace!("idle_sync done");
- self.sync().await?;
- Ok(())
+ pub fn notifier(&self) -> std::sync::Weak<Notify> {
+ Arc::downgrade(&self.watch.learnt_remote_update)
}
/// Applies a new operation on the state. Once this function returns,
@@ -259,7 +247,7 @@ impl<S: BayouState> Bayou<S> {
/// Make sure to call `.opportunistic_sync()` before doing this,
/// and even before calculating the `op` argument given here.
pub async fn push(&mut self, op: S::Op) -> Result<()> {
- debug!("(push) add operation: {:?}", op);
+ tracing::debug!("(push) add operation: {:?}", op);
let ts = Timestamp::after(
self.history
@@ -321,18 +309,18 @@ impl<S: BayouState> Bayou<S> {
{
Some(i) => i,
None => {
- debug!("(cp) Oldest operation is too recent to trigger checkpoint");
+ tracing::debug!("(cp) Oldest operation is too recent to trigger checkpoint");
return Ok(());
}
};
if i_cp < CHECKPOINT_MIN_OPS {
- debug!("(cp) Not enough old operations to trigger checkpoint");
+ tracing::debug!("(cp) Not enough old operations to trigger checkpoint");
return Ok(());
}
let ts_cp = self.history[i_cp].0;
- debug!(
+ tracing::debug!(
"(cp) we could checkpoint at time {} (index {} in history)",
ts_cp.to_string(),
i_cp
@@ -340,13 +328,13 @@ impl<S: BayouState> Bayou<S> {
// Check existing checkpoints: if last one is too recent, don't checkpoint again.
let existing_checkpoints = self.list_checkpoints().await?;
- debug!("(cp) listed checkpoints: {:?}", existing_checkpoints);
+ tracing::debug!("(cp) listed checkpoints: {:?}", existing_checkpoints);
if let Some(last_cp) = existing_checkpoints.last() {
if (ts_cp.msec as i128 - last_cp.0.msec as i128)
< CHECKPOINT_INTERVAL.as_millis() as i128
{
- debug!(
+ tracing::debug!(
"(cp) last checkpoint is too recent: {}, not checkpointing",
last_cp.0.to_string()
);
@@ -354,7 +342,7 @@ impl<S: BayouState> Bayou<S> {
}
}
- debug!("(cp) saving checkpoint at {}", ts_cp.to_string());
+ tracing::debug!("(cp) saving checkpoint at {}", ts_cp.to_string());
// Calculate state at time of checkpoint
let mut last_known_state = (0, &self.checkpoint.1);
@@ -370,7 +358,7 @@ impl<S: BayouState> Bayou<S> {
// Serialize and save checkpoint
let cryptoblob = seal_serialize(&state_cp, &self.key)?;
- debug!("(cp) checkpoint body length: {}", cryptoblob.len());
+ tracing::debug!("(cp) checkpoint body length: {}", cryptoblob.len());
let blob_val = storage::BlobVal::new(
storage::BlobRef(format!("{}/checkpoint/{}", self.path, ts_cp.to_string())),
@@ -385,7 +373,7 @@ impl<S: BayouState> Bayou<S> {
// Delete blobs
for (_ts, key) in existing_checkpoints[..last_to_keep].iter() {
- debug!("(cp) drop old checkpoint {}", key);
+ tracing::debug!("(cp) drop old checkpoint {}", key);
self.storage
.blob_rm(&storage::BlobRef(key.to_string()))
.await?;
@@ -440,7 +428,7 @@ struct K2vWatch {
target: storage::RowRef,
rx: watch::Receiver<storage::RowRef>,
propagate_local_update: Notify,
- learnt_remote_update: Notify,
+ learnt_remote_update: Arc<Notify>,
}
impl K2vWatch {
@@ -452,7 +440,7 @@ impl K2vWatch {
let (tx, rx) = watch::channel::<storage::RowRef>(target.clone());
let propagate_local_update = Notify::new();
- let learnt_remote_update = Notify::new();
+ let learnt_remote_update = Arc::new(Notify::new());
let watch = Arc::new(K2vWatch { target, rx, propagate_local_update, learnt_remote_update });
@@ -466,13 +454,13 @@ impl K2vWatch {
storage: storage::Store,
tx: watch::Sender<storage::RowRef>,
) {
- let mut row = match Weak::upgrade(&self_weak) {
- Some(this) => this.target.clone(),
+ let (mut row, remote_update) = match Weak::upgrade(&self_weak) {
+ Some(this) => (this.target.clone(), this.learnt_remote_update.clone()),
None => return,
};
while let Some(this) = Weak::upgrade(&self_weak) {
- debug!(
+ tracing::debug!(
"bayou k2v watch bg loop iter ({}, {})",
this.target.uid.shard, this.target.uid.sort
);
@@ -491,9 +479,11 @@ impl K2vWatch {
}
Ok(new_value) => {
row = new_value.row_ref;
- if tx.send(row.clone()).is_err() {
+ if let Err(e) = tx.send(row.clone()) {
+ tracing::warn!(err=?e, "(watch) can't record the new log ref");
break;
}
+ tracing::debug!(row=?row, "(watch) learnt remote update");
this.learnt_remote_update.notify_waiters();
}
}
@@ -505,12 +495,14 @@ impl K2vWatch {
let row_val = storage::RowVal::new(row.clone(), rand);
if let Err(e) = storage.row_insert(vec![row_val]).await
{
- error!("Error in bayou k2v watch updater loop: {}", e);
+ tracing::error!("Error in bayou k2v watch updater loop: {}", e);
tokio::time::sleep(Duration::from_secs(30)).await;
}
}
);
}
- info!("bayou k2v watch bg loop exiting");
+ // unblock listeners
+ remote_update.notify_waiters();
+ tracing::info!("bayou k2v watch bg loop exiting");
}
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-09-19 16:11:37 +0000