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use anyhow::Result;
use async_trait::async_trait;
use config::{SharedWorkerCache, WorkerId};
use crypto::{NetworkPublicKey, PublicKey};
use fastcrypto::Hash;
use futures::{stream::FuturesUnordered, StreamExt};
use network::{LuckyNetwork, P2pNetwork, UnreliableNetwork};
use std::{collections::HashSet, time::Duration};
use store::Store;
use tap::TapFallible;
use tokio::{
sync::{oneshot, watch},
task::JoinHandle,
time::{self, Timeout},
};
use tracing::{debug, error, info, trace};
use types::{
error::DagError,
metered_channel::{Receiver, Sender},
Batch, BatchDigest, PrimaryToWorker, PrimaryWorkerMessage, ReconfigureNotification,
RequestBatchRequest, RequestBatchResponse, WorkerBatchRequest, WorkerBatchResponse,
WorkerMessage, WorkerPrimaryMessage, WorkerSynchronizeMessage, WorkerToWorker,
};
#[cfg(test)]
#[path = "tests/handlers_tests.rs"]
pub mod handlers_tests;
pub struct ChildRpcSender {
name: PublicKey,
id: WorkerId,
worker_cache: SharedWorkerCache,
request_batches_timeout: Duration,
rx_request_batches_rpc: Receiver<(
Option<NetworkPublicKey>,
Option<usize>,
WorkerBatchRequest,
oneshot::Sender<Result<anemo::Response<WorkerBatchResponse>>>,
)>,
rx_reconfigure: watch::Receiver<ReconfigureNotification>,
network: P2pNetwork,
}
impl ChildRpcSender {
#[must_use]
pub fn spawn(
name: PublicKey,
id: WorkerId,
worker_cache: SharedWorkerCache,
request_batches_timeout: Duration,
rx_request_batches_rpc: Receiver<(
Option<NetworkPublicKey>,
Option<usize>,
WorkerBatchRequest,
oneshot::Sender<Result<anemo::Response<WorkerBatchResponse>>>,
)>,
rx_reconfigure: watch::Receiver<ReconfigureNotification>,
network: P2pNetwork,
) -> JoinHandle<()> {
tokio::spawn(async move {
Self {
name,
id,
worker_cache,
request_batches_timeout,
rx_request_batches_rpc,
rx_reconfigure,
network,
}
.run()
.await;
})
}
async fn handle_worker_batch_responses(
responses: Vec<Timeout<JoinHandle<Result<anemo::Response<WorkerBatchResponse>>>>>,
response_channel: oneshot::Sender<Result<anemo::Response<WorkerBatchResponse>>>,
) {
let mut results: FuturesUnordered<_> = responses.into_iter().collect();
let mut last_result: Result<anemo::Response<WorkerBatchResponse>> = Err(anyhow::anyhow!(
"no WorkerBatchResponse received (or request(s) timed out)"
));
while let Some(result) = results.next().await {
match result {
Ok(Ok(Ok(result))) => {
let _ = response_channel.send(Ok(result));
return;
}
Ok(Ok(Err(e))) => last_result = Err(e),
_ => (),
}
}
let _ = response_channel.send(last_result);
}
async fn run(&mut self) {
let mut inflight_requests = FuturesUnordered::new();
loop {
tokio::select! {
Some((target, num_nodes, request, response_channel)) = self.rx_request_batches_rpc.recv() => {
if target.is_some() && num_nodes.is_some() {
panic!("cannot set both target and num_nodes");
}
if let Some(target) = target {
match self.network.unreliable_send(target, &request) {
Ok(handle) => {
inflight_requests.push(Self::handle_worker_batch_responses(
vec![time::timeout(self.request_batches_timeout, handle)], response_channel))
},
Err(e) => {
let _ = response_channel.send(Err(e));
},
}
} else if let Some(num_nodes) = num_nodes {
let names = self.worker_cache.load()
.others_workers(&self.name, &self.id)
.into_iter()
.map(|(_, info)| info.name)
.collect();
let handles: Vec<_> = self.network.lucky_broadcast(names, &request, num_nodes)
.into_iter()
.flatten()
.map(|handle| time::timeout(self.request_batches_timeout, handle))
.collect();
if handles.is_empty() {
let _ = response_channel.send(
Err(anyhow::anyhow!("could not lucky_broadcast WorkerBatchRequest to any node")));
} else {
inflight_requests.push(Self::handle_worker_batch_responses(handles, response_channel));
};
} else {
panic!("one of target or num_nodes must be set");
}
},
result = self.rx_reconfigure.changed() => {
result.expect("Committee channel dropped");
if let ReconfigureNotification::Shutdown = self.rx_reconfigure.borrow().clone() {
return
}
},
Some(_) = inflight_requests.next() => {},
else => { break }
}
}
}
}
#[derive(Clone)]
pub struct WorkerReceiverHandler {
pub tx_processor: Sender<Batch>,
pub store: Store<BatchDigest, Batch>,
}
#[async_trait]
impl WorkerToWorker for WorkerReceiverHandler {
async fn send_message(
&self,
request: anemo::Request<WorkerMessage>,
) -> Result<anemo::Response<()>, anemo::rpc::Status> {
let message = request.into_body();
match message {
WorkerMessage::Batch(batch) => self
.tx_processor
.send(batch)
.await
.map_err(|_| DagError::ShuttingDown),
}
.map(|_| anemo::Response::new(()))
.map_err(|e| anemo::rpc::Status::internal(e.to_string()))
}
async fn request_batches(
&self,
request: anemo::Request<WorkerBatchRequest>,
) -> Result<anemo::Response<WorkerBatchResponse>, anemo::rpc::Status> {
let message = request.into_body();
let batches: Vec<Batch> = self
.store
.read_all(message.digests)
.await
.map_err(|e| anemo::rpc::Status::from_error(Box::new(e)))?
.into_iter()
.flatten()
.collect();
Ok(anemo::Response::new(WorkerBatchResponse { batches }))
}
}
#[derive(Clone)]
pub struct PrimaryReceiverHandler {
pub id: WorkerId,
pub worker_cache: SharedWorkerCache,
pub store: Store<BatchDigest, Batch>,
pub request_batches_retry_nodes: usize,
pub tx_synchronizer: Sender<PrimaryWorkerMessage>,
pub tx_request_batches_rpc: Sender<(
Option<NetworkPublicKey>,
Option<usize>,
WorkerBatchRequest,
oneshot::Sender<Result<anemo::Response<WorkerBatchResponse>>>,
)>,
pub tx_primary: Sender<WorkerPrimaryMessage>,
pub tx_batch_processor: Sender<Batch>,
}
#[async_trait]
impl PrimaryToWorker for PrimaryReceiverHandler {
async fn send_message(
&self,
request: anemo::Request<PrimaryWorkerMessage>,
) -> Result<anemo::Response<()>, anemo::rpc::Status> {
let message = request.into_body();
self.tx_synchronizer
.send(message)
.await
.map_err(|_| DagError::ShuttingDown)
.map_err(|e| anemo::rpc::Status::internal(e.to_string()))?;
Ok(anemo::Response::new(()))
}
async fn synchronize(
&self,
request: anemo::Request<WorkerSynchronizeMessage>,
) -> Result<anemo::Response<()>, anemo::rpc::Status> {
let message = request.into_body();
let mut missing = HashSet::new();
let mut available = HashSet::new();
for digest in message.digests.iter() {
match self.store.read(*digest).await {
Ok(None) => {
missing.insert(*digest);
debug!("Requesting sync for batch {digest}");
}
Ok(Some(_)) => {
available.insert(*digest);
trace!("Digest {digest} already in store, nothing to sync");
continue;
}
Err(e) => {
error!("{e}");
continue;
}
};
}
for digest in available {
let message = WorkerPrimaryMessage::OthersBatch(digest, self.id);
let _ = self.tx_primary.send(message).await.tap_err(|err| {
debug!("{err:?} {}", DagError::ShuttingDown);
});
}
if missing.is_empty() {
debug!(
"All batches are already available {:?} nothing to request from peers",
message.digests
);
return Ok(anemo::Response::new(()));
}
let worker_name = match self.worker_cache.load().worker(&message.target, &self.id) {
Ok(worker_info) => worker_info.name,
Err(e) => {
return Err(anemo::rpc::Status::internal(format!(
"The primary asked us to sync with an unknown node: {e}"
)));
}
};
debug!(
"Sending WorkerBatchRequest message to {} for missing batches {:?}",
worker_name,
missing.clone()
);
let (tx_batch_response, rx_batch_response) = oneshot::channel();
let message = WorkerBatchRequest {
digests: missing.iter().cloned().collect(),
};
self.tx_request_batches_rpc
.send((Some(worker_name.clone()), None, message, tx_batch_response))
.await
.map_err(|e| anemo::rpc::Status::internal(e.to_string()))?;
let response = rx_batch_response
.await
.map_err(|e| anemo::rpc::Status::internal(e.to_string()))?;
if let Ok(response) = response {
for batch in response.into_body().batches {
let digest = &batch.digest();
if missing.remove(digest) {
if self.tx_batch_processor.send(batch).await.is_err() {
return Err(anemo::rpc::Status::internal("shutting down"));
}
}
}
} else {
let e = response.err().unwrap();
info!("WorkerBatchRequest to first target {worker_name} failed: {e}");
}
if missing.is_empty() {
return Ok(anemo::Response::new(()));
}
let (tx_batch_response, rx_batch_response) = oneshot::channel();
let message = WorkerBatchRequest {
digests: missing.iter().cloned().collect(),
};
self.tx_request_batches_rpc
.send((
None,
Some(self.request_batches_retry_nodes),
message,
tx_batch_response,
))
.await
.map_err(|e| anemo::rpc::Status::internal(e.to_string()))?;
let response = rx_batch_response
.await
.map_err(|e| anemo::rpc::Status::internal(e.to_string()))?;
if let Ok(response) = response {
for batch in response.into_body().batches {
if missing.remove(&batch.digest()) {
if self.tx_batch_processor.send(batch).await.is_err() {
return Err(anemo::rpc::Status::internal("shutting down"));
}
}
}
}
if missing.is_empty() {
return Ok(anemo::Response::new(()));
}
Err(anemo::rpc::Status::unknown(format!(
"Unable to retrieve batches after retry: {missing:?}"
)))
}
async fn request_batch(
&self,
request: anemo::Request<RequestBatchRequest>,
) -> Result<anemo::Response<RequestBatchResponse>, anemo::rpc::Status> {
let batch = request.into_body().batch;
let batch = self
.store
.read(batch)
.await
.map_err(|e| anemo::rpc::Status::from_error(Box::new(e)))?;
Ok(anemo::Response::new(RequestBatchResponse { batch }))
}
}