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use std::sync::Arc;
use std::time::Duration;
use async_trait::async_trait;
use tokio::select;
use tokio::sync::watch;
use garage_util::background::*;
use garage_util::error::Error;
use crate::replication::*;
use crate::schema::*;
use crate::table::*;
const BATCH_SIZE: usize = 100;
pub(crate) struct InsertQueueWorker<F, R>(pub(crate) Arc<Table<F, R>>)
where
F: TableSchema + 'static,
R: TableReplication + 'static;
#[async_trait]
impl<F, R> Worker for InsertQueueWorker<F, R>
where
F: TableSchema + 'static,
R: TableReplication + 'static,
{
fn name(&self) -> String {
format!("{} queue", F::TABLE_NAME)
}
fn status(&self) -> WorkerStatus {
WorkerStatus {
queue_length: Some(self.0.data.insert_queue.len().unwrap_or(0) as u64),
..Default::default()
}
}
async fn work(&mut self, _must_exit: &mut watch::Receiver<bool>) -> Result<WorkerState, Error> {
let mut kv_pairs = vec![];
let mut values = vec![];
for entry_kv in self.0.data.insert_queue.iter()? {
let (k, v) = entry_kv?;
values.push(self.0.data.decode_entry(&v)?);
kv_pairs.push((k, v));
if kv_pairs.len() > BATCH_SIZE {
break;
}
}
if kv_pairs.is_empty() {
return Ok(WorkerState::Idle);
}
self.0.insert_many(values).await?;
self.0.data.insert_queue.db().transaction(|mut tx| {
for (k, v) in kv_pairs.iter() {
if let Some(v2) = tx.get(&self.0.data.insert_queue, k)? {
if &v2 == v {
tx.remove(&self.0.data.insert_queue, k)?;
}
}
}
Ok(())
})?;
Ok(WorkerState::Busy)
}
async fn wait_for_work(&mut self) -> WorkerState {
select! {
_ = tokio::time::sleep(Duration::from_secs(600)) => (),
_ = self.0.data.insert_queue_notify.notified() => (),
}
WorkerState::Busy
}
}
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