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use crate::{counters::DISCOVERY_COUNTS, file::FileStream, validator_set::ValidatorSetStream};
use channel::{diem_channel, diem_channel::Receiver};
use diem_config::{config::PeerSet, network_id::NetworkContext};
use diem_crypto::x25519;
use diem_logger::prelude::*;
use diem_network_address_encryption::Encryptor;
use diem_secure_storage::Storage;
use diem_time_service::TimeService;
use diem_types::on_chain_config::{OnChainConfigPayload, ON_CHAIN_CONFIG_REGISTRY};
use futures::{Stream, StreamExt};
use network::{
connectivity_manager::{ConnectivityRequest, DiscoverySource},
counters::inc_by_with_context,
logging::NetworkSchema,
};
use std::{
path::Path,
pin::Pin,
sync::Arc,
task::{Context, Poll},
time::Duration,
};
use subscription_service::ReconfigSubscription;
use tokio::runtime::Handle;
mod counters;
mod file;
mod validator_set;
#[derive(Debug)]
pub enum DiscoveryError {
IO(std::io::Error),
Parsing(String),
}
pub struct DiscoveryChangeListener {
discovery_source: DiscoverySource,
network_context: Arc<NetworkContext>,
update_channel: channel::Sender<ConnectivityRequest>,
source_stream: DiscoveryChangeStream,
}
#[allow(clippy::large_enum_variant)]
enum DiscoveryChangeStream {
ValidatorSet(ValidatorSetStream),
File(FileStream),
}
impl Stream for DiscoveryChangeStream {
type Item = Result<PeerSet, DiscoveryError>;
fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Option<Self::Item>> {
match self.get_mut() {
Self::ValidatorSet(stream) => Pin::new(stream).poll_next(cx),
Self::File(stream) => Pin::new(stream).poll_next(cx),
}
}
}
impl DiscoveryChangeListener {
pub fn validator_set(
network_context: Arc<NetworkContext>,
update_channel: channel::Sender<ConnectivityRequest>,
expected_pubkey: x25519::PublicKey,
encryptor: Encryptor<Storage>,
reconfig_events: diem_channel::Receiver<(), OnChainConfigPayload>,
) -> Self {
let source_stream = DiscoveryChangeStream::ValidatorSet(ValidatorSetStream::new(
network_context.clone(),
expected_pubkey,
encryptor,
reconfig_events,
));
DiscoveryChangeListener {
discovery_source: DiscoverySource::OnChainValidatorSet,
network_context,
update_channel,
source_stream,
}
}
pub fn file(
network_context: Arc<NetworkContext>,
update_channel: channel::Sender<ConnectivityRequest>,
file_path: &Path,
interval_duration: Duration,
time_service: TimeService,
) -> Self {
let source_stream = DiscoveryChangeStream::File(FileStream::new(
file_path,
interval_duration,
time_service,
));
DiscoveryChangeListener {
discovery_source: DiscoverySource::File,
network_context,
update_channel,
source_stream,
}
}
pub fn start(self, executor: &Handle) {
executor.spawn(Box::pin(self).run());
}
async fn run(mut self: Pin<Box<Self>>) {
let network_context = self.network_context.clone();
let discovery_source = self.discovery_source;
let mut update_channel = self.update_channel.clone();
let source_stream = &mut self.source_stream;
info!(
NetworkSchema::new(&network_context),
"{} Starting {} Discovery", network_context, discovery_source
);
while let Some(update) = source_stream.next().await {
if let Ok(update) = update {
trace!(
NetworkSchema::new(&network_context),
"{} Sending update: {:?}",
network_context,
update
);
let request = ConnectivityRequest::UpdateDiscoveredPeers(discovery_source, update);
if let Err(error) = update_channel.try_send(request) {
inc_by_with_context(&DISCOVERY_COUNTS, &network_context, "send_failure", 1);
warn!(
NetworkSchema::new(&network_context),
"{} Failed to send update {:?}", network_context, error
);
}
} else {
warn!(
NetworkSchema::new(&network_context),
"{} {} Discovery update failed {:?}",
&network_context,
discovery_source,
update
);
}
}
warn!(
NetworkSchema::new(&network_context),
"{} {} Discovery actor terminated", &network_context, discovery_source
);
}
pub fn discovery_source(&self) -> DiscoverySource {
self.discovery_source
}
}
pub fn gen_simple_discovery_reconfig_subscription(
) -> (ReconfigSubscription, Receiver<(), OnChainConfigPayload>) {
ReconfigSubscription::subscribe_all("network", ON_CHAIN_CONFIG_REGISTRY.to_vec(), vec![])
}