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if let Some(ref mut s) = self.provisioner_subsystem.instance {
let _ = s.tx.send(FromOverseer::Communication { msg }).await;
}
}
AllMessages::PoVDistribution(msg) => {
if let Some(ref mut s) = self.pov_distribution_subsystem.instance {
let _ = s.tx.send(FromOverseer::Communication { msg }).await;
}
}
AllMessages::RuntimeApi(msg) => {
if let Some(ref mut s) = self.runtime_api_subsystem.instance {
let _ = s.tx.send(FromOverseer::Communication { msg }).await;
}
}
AllMessages::AvailabilityStore(msg) => {
if let Some(ref mut s) = self.availability_store_subsystem.instance {
let _ = s.tx.send(FromOverseer::Communication { msg }).await;
}
}
AllMessages::NetworkBridge(msg) => {
if let Some(ref mut s) = self.network_bridge_subsystem.instance {
let _ = s.tx.send(FromOverseer::Communication { msg }).await;
}
AllMessages::ChainApi(msg) => {
if let Some(ref mut s) = self.chain_api_subsystem.instance {
let _ = s.tx.send(FromOverseer::Communication { msg }).await;
}
}
AllMessages::CollationGeneration(msg) => {
if let Some(ref mut s) = self.collation_generation_subsystem.instance {
let _ = s.tx.send(FromOverseer::Communication { msg }).await;
}
}
AllMessages::CollatorProtocol(msg) => {
if let Some(ref mut s) = self.collator_protocol_subsystem.instance {
let _ = s.tx.send(FromOverseer::Communication { msg }).await;
}
}
fn spawn_job(&mut self, name: &'static str, j: BoxFuture<'static, ()>) {
self.s.spawn(name, j);
fn spawn_blocking_job(&mut self, name: &'static str, j: BoxFuture<'static, ()>) {
self.s.spawn_blocking(name, j);
}
fn spawn<S: SpawnNamed, M: Send + 'static>(
futures: &mut FuturesUnordered<BoxFuture<'static, ()>>,
streams: &mut StreamUnordered<mpsc::Receiver<ToOverseer>>,
s: impl Subsystem<OverseerSubsystemContext<M>>,
) -> SubsystemResult<OverseenSubsystem<M>> {
let (to_tx, to_rx) = mpsc::channel(CHANNEL_CAPACITY);
let (from_tx, from_rx) = mpsc::channel(CHANNEL_CAPACITY);
let ctx = OverseerSubsystemContext { rx: to_rx, tx: from_tx };
let SpawnedSubsystem { future, name } = s.start(ctx);
let (tx, rx) = oneshot::channel();
let fut = Box::pin(async move {
future.await;
let _ = tx.send(());
});
spawner.spawn(name, fut);
futures.push(Box::pin(rx.map(|_| ())));
let instance = Some(SubsystemInstance {
tx: to_tx,
});
Ok(OverseenSubsystem {
instance,
})
}
use std::sync::atomic;
use futures::{executor, pin_mut, select, channel::mpsc, FutureExt};
use polkadot_primitives::v1::{BlockData, CollatorPair, PoV};
use polkadot_subsystem::DummySubsystem;
use polkadot_subsystem::messages::RuntimeApiRequest;
use polkadot_node_primitives::{Collation, CollationGenerationConfig};
use polkadot_node_network_protocol::{PeerId, ReputationChange, NetworkBridgeEvent};
impl<C> Subsystem<C> for TestSubsystem1
where C: SubsystemContext<Message=CandidateValidationMessage>
{
fn start(self, mut ctx: C) -> SpawnedSubsystem {
let mut sender = self.0;
SpawnedSubsystem {
name: "test-subsystem-1",
future: Box::pin(async move {
let mut i = 0;
loop {
match ctx.recv().await {
Ok(FromOverseer::Communication { .. }) => {
let _ = sender.send(i).await;
i += 1;
continue;
}
Ok(FromOverseer::Signal(OverseerSignal::Conclude)) => return,
Err(_) => return,
_ => (),
}
}
struct TestSubsystem2(mpsc::Sender<usize>);
impl<C> Subsystem<C> for TestSubsystem2
where C: SubsystemContext<Message=CandidateBackingMessage>
{
fn start(self, mut ctx: C) -> SpawnedSubsystem {
let sender = self.0.clone();
SpawnedSubsystem {
name: "test-subsystem-2",
future: Box::pin(async move {
let _sender = sender;
let mut c: usize = 0;
loop {
if c < 10 {
let (tx, _) = oneshot::channel();
ctx.send_message(
AllMessages::CandidateValidation(
CandidateValidationMessage::ValidateFromChainState(
Default::default(),
PoV {
block_data: BlockData(Vec::new()),
}.into(),
tx,
)
).await.unwrap();
c += 1;
match ctx.try_recv().await {
Ok(Some(FromOverseer::Signal(OverseerSignal::Conclude))) => {
break;
}
Ok(Some(_)) => {
continue;
}
Err(_) => return,
_ => (),
}
pending!();
impl<C> Subsystem<C> for TestSubsystem4
where C: SubsystemContext<Message=CandidateBackingMessage>
{
fn start(self, mut _ctx: C) -> SpawnedSubsystem {
SpawnedSubsystem {
name: "test-subsystem-4",
future: Box::pin(async move {
// Do nothing and exit.
}),
}
}
}
// Checks that a minimal configuration of two jobs can run and exchange messages.
#[test]
fn overseer_works() {
let spawner = sp_core::testing::TaskExecutor::new();
executor::block_on(async move {
let (s1_tx, mut s1_rx) = mpsc::channel(64);
let (s2_tx, mut s2_rx) = mpsc::channel(64);
let all_subsystems = AllSubsystems {
candidate_validation: TestSubsystem1(s1_tx),
candidate_backing: TestSubsystem2(s2_tx),
candidate_selection: DummySubsystem,
statement_distribution: DummySubsystem,
availability_distribution: DummySubsystem,
bitfield_signing: DummySubsystem,
bitfield_distribution: DummySubsystem,
provisioner: DummySubsystem,
pov_distribution: DummySubsystem,
runtime_api: DummySubsystem,
availability_store: DummySubsystem,
network_bridge: DummySubsystem,
collation_generation: DummySubsystem,
collator_protocol: DummySubsystem,
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spawner,
).unwrap();
let overseer_fut = overseer.run().fuse();
pin_mut!(overseer_fut);
let mut s1_results = Vec::new();
let mut s2_results = Vec::new();
loop {
select! {
a = overseer_fut => break,
s1_next = s1_rx.next() => {
match s1_next {
Some(msg) => {
s1_results.push(msg);
if s1_results.len() == 10 {
handler.stop().await.unwrap();
}
}
None => break,
}
},
s2_next = s2_rx.next() => {
match s2_next {
Some(msg) => s2_results.push(s2_next),
None => break,
}
},
complete => break,
}
}
assert_eq!(s1_results, (0..10).collect::<Vec<_>>());
});
}
// Spawn a subsystem that immediately exits.
//
// Should immediately conclude the overseer itself with an error.
#[test]
![asynchronous rob asynchronous rob's avatar](/assets/no_avatar-849f9c04a3a0d0cea2424ae97b27447dc64a7dbfae83c036c45b403392f0e8ba.png)
asynchronous rob
committed
fn overseer_panics_on_subsystem_exit() {
let spawner = sp_core::testing::TaskExecutor::new();
executor::block_on(async move {
let (s1_tx, _) = mpsc::channel(64);
let all_subsystems = AllSubsystems {
candidate_validation: TestSubsystem1(s1_tx),
candidate_backing: TestSubsystem4,
candidate_selection: DummySubsystem,
statement_distribution: DummySubsystem,
availability_distribution: DummySubsystem,
bitfield_signing: DummySubsystem,
bitfield_distribution: DummySubsystem,
provisioner: DummySubsystem,
pov_distribution: DummySubsystem,
runtime_api: DummySubsystem,
availability_store: DummySubsystem,
network_bridge: DummySubsystem,
collation_generation: DummySubsystem,
collator_protocol: DummySubsystem,
spawner,
).unwrap();
let overseer_fut = overseer.run().fuse();
pin_mut!(overseer_fut);
select! {
res = overseer_fut => assert!(res.is_err()),
complete => (),
}
})
}
struct TestSubsystem5(mpsc::Sender<OverseerSignal>);
impl<C> Subsystem<C> for TestSubsystem5
where C: SubsystemContext<Message=CandidateValidationMessage>
{
fn start(self, mut ctx: C) -> SpawnedSubsystem {
let mut sender = self.0.clone();
SpawnedSubsystem {
name: "test-subsystem-5",
future: Box::pin(async move {
loop {
match ctx.try_recv().await {
Ok(Some(FromOverseer::Signal(OverseerSignal::Conclude))) => break,
Ok(Some(FromOverseer::Signal(s))) => {
sender.send(s).await.unwrap();
continue;
},
Ok(Some(_)) => continue,
Err(_) => return,
_ => (),
}
pending!();
}
}
struct TestSubsystem6(mpsc::Sender<OverseerSignal>);
impl<C> Subsystem<C> for TestSubsystem6
where C: SubsystemContext<Message=CandidateBackingMessage>
{
fn start(self, mut ctx: C) -> SpawnedSubsystem {
let mut sender = self.0.clone();
SpawnedSubsystem {
name: "test-subsystem-6",
future: Box::pin(async move {
loop {
match ctx.try_recv().await {
Ok(Some(FromOverseer::Signal(OverseerSignal::Conclude))) => break,
Ok(Some(FromOverseer::Signal(s))) => {
sender.send(s).await.unwrap();
continue;
},
Ok(Some(_)) => continue,
Err(_) => return,
_ => (),
}
pending!();
}
}
// Tests that starting with a defined set of leaves and receiving
// notifications on imported blocks triggers expected `StartWork` and `StopWork` heartbeats.
#[test]
fn overseer_start_stop_works() {
let spawner = sp_core::testing::TaskExecutor::new();
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executor::block_on(async move {
let first_block_hash = [1; 32].into();
let second_block_hash = [2; 32].into();
let third_block_hash = [3; 32].into();
let first_block = BlockInfo {
hash: first_block_hash,
parent_hash: [0; 32].into(),
number: 1,
};
let second_block = BlockInfo {
hash: second_block_hash,
parent_hash: first_block_hash,
number: 2,
};
let third_block = BlockInfo {
hash: third_block_hash,
parent_hash: second_block_hash,
number: 3,
};
let (tx_5, mut rx_5) = mpsc::channel(64);
let (tx_6, mut rx_6) = mpsc::channel(64);
let all_subsystems = AllSubsystems {
candidate_validation: TestSubsystem5(tx_5),
candidate_backing: TestSubsystem6(tx_6),
candidate_selection: DummySubsystem,
statement_distribution: DummySubsystem,
availability_distribution: DummySubsystem,
bitfield_signing: DummySubsystem,
bitfield_distribution: DummySubsystem,
provisioner: DummySubsystem,
pov_distribution: DummySubsystem,
runtime_api: DummySubsystem,
availability_store: DummySubsystem,
network_bridge: DummySubsystem,
collation_generation: DummySubsystem,
collator_protocol: DummySubsystem,
let (overseer, mut handler) = Overseer::new(
vec![first_block],
spawner,
).unwrap();
let overseer_fut = overseer.run().fuse();
pin_mut!(overseer_fut);
let mut ss5_results = Vec::new();
let mut ss6_results = Vec::new();
handler.block_imported(second_block).await.unwrap();
handler.block_imported(third_block).await.unwrap();
let expected_heartbeats = vec![
OverseerSignal::ActiveLeaves(ActiveLeavesUpdate::start_work(first_block_hash)),
OverseerSignal::ActiveLeaves(ActiveLeavesUpdate {
activated: [second_block_hash].as_ref().into(),
deactivated: [first_block_hash].as_ref().into(),
}),
OverseerSignal::ActiveLeaves(ActiveLeavesUpdate {
activated: [third_block_hash].as_ref().into(),
deactivated: [second_block_hash].as_ref().into(),
}),
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];
loop {
select! {
res = overseer_fut => {
assert!(res.is_ok());
break;
},
res = rx_5.next() => {
if let Some(res) = res {
ss5_results.push(res);
}
}
res = rx_6.next() => {
if let Some(res) = res {
ss6_results.push(res);
}
}
complete => break,
}
if ss5_results.len() == expected_heartbeats.len() &&
ss6_results.len() == expected_heartbeats.len() {
handler.stop().await.unwrap();
}
}
assert_eq!(ss5_results, expected_heartbeats);
assert_eq!(ss6_results, expected_heartbeats);
});
}
// Tests that starting with a defined set of leaves and receiving
// notifications on imported blocks triggers expected `StartWork` and `StopWork` heartbeats.
#[test]
fn overseer_finalize_works() {
let spawner = sp_core::testing::TaskExecutor::new();
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executor::block_on(async move {
let first_block_hash = [1; 32].into();
let second_block_hash = [2; 32].into();
let third_block_hash = [3; 32].into();
let first_block = BlockInfo {
hash: first_block_hash,
parent_hash: [0; 32].into(),
number: 1,
};
let second_block = BlockInfo {
hash: second_block_hash,
parent_hash: [42; 32].into(),
number: 2,
};
let third_block = BlockInfo {
hash: third_block_hash,
parent_hash: second_block_hash,
number: 3,
};
let (tx_5, mut rx_5) = mpsc::channel(64);
let (tx_6, mut rx_6) = mpsc::channel(64);
let all_subsystems = AllSubsystems {
candidate_validation: TestSubsystem5(tx_5),
candidate_backing: TestSubsystem6(tx_6),
candidate_selection: DummySubsystem,
statement_distribution: DummySubsystem,
availability_distribution: DummySubsystem,
bitfield_signing: DummySubsystem,
bitfield_distribution: DummySubsystem,
provisioner: DummySubsystem,
pov_distribution: DummySubsystem,
runtime_api: DummySubsystem,
availability_store: DummySubsystem,
network_bridge: DummySubsystem,
collation_generation: DummySubsystem,
collator_protocol: DummySubsystem,
// start with two forks of different height.
let (overseer, mut handler) = Overseer::new(
vec![first_block, second_block],
spawner,
).unwrap();
let overseer_fut = overseer.run().fuse();
pin_mut!(overseer_fut);
let mut ss5_results = Vec::new();
let mut ss6_results = Vec::new();
// this should stop work on both forks we started with earlier.
handler.block_finalized(third_block).await.unwrap();
let expected_heartbeats = vec![
OverseerSignal::ActiveLeaves(ActiveLeavesUpdate {
activated: [first_block_hash, second_block_hash].as_ref().into(),
..Default::default()
}),
OverseerSignal::ActiveLeaves(ActiveLeavesUpdate {
deactivated: [first_block_hash, second_block_hash].as_ref().into(),
..Default::default()
}),
OverseerSignal::BlockFinalized(third_block_hash),
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];
loop {
select! {
res = overseer_fut => {
assert!(res.is_ok());
break;
},
res = rx_5.next() => {
if let Some(res) = res {
ss5_results.push(res);
}
}
res = rx_6.next() => {
if let Some(res) = res {
ss6_results.push(res);
}
}
complete => break,
}
if ss5_results.len() == expected_heartbeats.len() &&
ss6_results.len() == expected_heartbeats.len() {
handler.stop().await.unwrap();
}
}
assert_eq!(ss5_results.len(), expected_heartbeats.len());
assert_eq!(ss6_results.len(), expected_heartbeats.len());
// Notifications on finality for multiple blocks at once
// may be received in different orders.
for expected in expected_heartbeats {
assert!(ss5_results.contains(&expected));
assert!(ss6_results.contains(&expected));
}
});
}
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#[derive(Clone)]
struct CounterSubsystem {
stop_signals_received: Arc<atomic::AtomicUsize>,
signals_received: Arc<atomic::AtomicUsize>,
msgs_received: Arc<atomic::AtomicUsize>,
}
impl CounterSubsystem {
fn new(
stop_signals_received: Arc<atomic::AtomicUsize>,
signals_received: Arc<atomic::AtomicUsize>,
msgs_received: Arc<atomic::AtomicUsize>,
) -> Self {
Self {
stop_signals_received,
signals_received,
msgs_received,
}
}
}
impl<C, M> Subsystem<C> for CounterSubsystem
where
C: SubsystemContext<Message=M>,
M: Send,
{
fn start(self, mut ctx: C) -> SpawnedSubsystem {
SpawnedSubsystem {
name: "counter-subsystem",
future: Box::pin(async move {
loop {
match ctx.try_recv().await {
Ok(Some(FromOverseer::Signal(OverseerSignal::Conclude))) => {
self.stop_signals_received.fetch_add(1, atomic::Ordering::SeqCst);
break;
},
Ok(Some(FromOverseer::Signal(_))) => {
self.signals_received.fetch_add(1, atomic::Ordering::SeqCst);
continue;
},
Ok(Some(FromOverseer::Communication { .. })) => {
self.msgs_received.fetch_add(1, atomic::Ordering::SeqCst);
continue;
},
Err(_) => (),
_ => (),
}
pending!();
}
}),
}
}
}
fn test_candidate_validation_msg() -> CandidateValidationMessage {
let (sender, _) = oneshot::channel();
let pov = Arc::new(PoV { block_data: BlockData(Vec::new()) });
CandidateValidationMessage::ValidateFromChainState(Default::default(), pov, sender)
}
fn test_candidate_backing_msg() -> CandidateBackingMessage {
let (sender, _) = oneshot::channel();
CandidateBackingMessage::GetBackedCandidates(Default::default(), sender)
}
fn test_candidate_selection_msg() -> CandidateSelectionMessage {
CandidateSelectionMessage::default()
}
fn test_chain_api_msg() -> ChainApiMessage {
let (sender, _) = oneshot::channel();
ChainApiMessage::FinalizedBlockNumber(sender)
}
fn test_collator_generation_msg() -> CollationGenerationMessage {
CollationGenerationMessage::Initialize(CollationGenerationConfig {
key: CollatorPair::generate().0,
collator: Box::new(|_, _| Box::new(TestCollator)),
para_id: Default::default(),
})
}
struct TestCollator;
impl Future for TestCollator {
type Output = Collation;
fn poll(self: Pin<&mut Self>, _cx: &mut futures::task::Context) -> Poll<Self::Output> {
panic!("at the Disco")
}
}
impl Unpin for TestCollator {}
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fn test_collator_protocol_msg() -> CollatorProtocolMessage {
CollatorProtocolMessage::CollateOn(Default::default())
}
fn test_network_bridge_event<M>() -> NetworkBridgeEvent<M> {
NetworkBridgeEvent::PeerDisconnected(PeerId::random())
}
fn test_statement_distribution_msg() -> StatementDistributionMessage {
StatementDistributionMessage::NetworkBridgeUpdateV1(test_network_bridge_event())
}
fn test_availability_distribution_msg() -> AvailabilityDistributionMessage {
AvailabilityDistributionMessage::NetworkBridgeUpdateV1(test_network_bridge_event())
}
fn test_bitfield_distribution_msg() -> BitfieldDistributionMessage {
BitfieldDistributionMessage::NetworkBridgeUpdateV1(test_network_bridge_event())
}
fn test_provisioner_msg() -> ProvisionerMessage {
let (sender, _) = oneshot::channel();
ProvisionerMessage::RequestInherentData(Default::default(), sender)
}
fn test_pov_distribution_msg() -> PoVDistributionMessage {
PoVDistributionMessage::NetworkBridgeUpdateV1(test_network_bridge_event())
}
fn test_runtime_api_msg() -> RuntimeApiMessage {
let (sender, _) = oneshot::channel();
RuntimeApiMessage::Request(Default::default(), RuntimeApiRequest::Validators(sender))
}
fn test_availability_store_msg() -> AvailabilityStoreMessage {
let (sender, _) = oneshot::channel();
AvailabilityStoreMessage::QueryAvailableData(Default::default(), sender)
}
fn test_network_bridge_msg() -> NetworkBridgeMessage {
NetworkBridgeMessage::ReportPeer(PeerId::random(), ReputationChange::new(42, ""))
}
// Checks that `stop`, `broadcast_signal` and `broadcast_message` are implemented correctly.
#[test]
fn overseer_all_subsystems_receive_signals_and_messages() {
let spawner = sp_core::testing::TaskExecutor::new();
executor::block_on(async move {
let stop_signals_received = Arc::new(atomic::AtomicUsize::new(0));
let signals_received = Arc::new(atomic::AtomicUsize::new(0));
let msgs_received = Arc::new(atomic::AtomicUsize::new(0));
let subsystem = CounterSubsystem::new(
stop_signals_received.clone(),
signals_received.clone(),
msgs_received.clone(),
);
let all_subsystems = AllSubsystems {
candidate_validation: subsystem.clone(),
candidate_backing: subsystem.clone(),
candidate_selection: subsystem.clone(),
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collator_protocol: subsystem.clone(),
statement_distribution: subsystem.clone(),
availability_distribution: subsystem.clone(),
bitfield_signing: subsystem.clone(),
bitfield_distribution: subsystem.clone(),
provisioner: subsystem.clone(),
pov_distribution: subsystem.clone(),
runtime_api: subsystem.clone(),
availability_store: subsystem.clone(),
network_bridge: subsystem.clone(),
chain_api: subsystem.clone(),
};
let (overseer, mut handler) = Overseer::new(
vec![],
all_subsystems,
spawner,
).unwrap();
let overseer_fut = overseer.run().fuse();
pin_mut!(overseer_fut);
// send a signal to each subsystem
handler.block_imported(BlockInfo {
hash: Default::default(),
parent_hash: Default::default(),
number: Default::default(),
}).await.unwrap();
// send a msg to each subsystem
// except for BitfieldSigning as the message is not instantiable
handler.send_msg(AllMessages::CandidateValidation(test_candidate_validation_msg())).await.unwrap();
handler.send_msg(AllMessages::CandidateBacking(test_candidate_backing_msg())).await.unwrap();
handler.send_msg(AllMessages::CandidateSelection(test_candidate_selection_msg())).await.unwrap();
handler.send_msg(AllMessages::CollationGeneration(test_collator_generation_msg())).await.unwrap();
handler.send_msg(AllMessages::CollatorProtocol(test_collator_protocol_msg())).await.unwrap();
handler.send_msg(AllMessages::StatementDistribution(test_statement_distribution_msg())).await.unwrap();
handler.send_msg(AllMessages::AvailabilityDistribution(test_availability_distribution_msg())).await.unwrap();
// handler.send_msg(AllMessages::BitfieldSigning(test_bitfield_signing_msg())).await.unwrap();
handler.send_msg(AllMessages::BitfieldDistribution(test_bitfield_distribution_msg())).await.unwrap();
handler.send_msg(AllMessages::Provisioner(test_provisioner_msg())).await.unwrap();
handler.send_msg(AllMessages::PoVDistribution(test_pov_distribution_msg())).await.unwrap();
handler.send_msg(AllMessages::RuntimeApi(test_runtime_api_msg())).await.unwrap();
handler.send_msg(AllMessages::AvailabilityStore(test_availability_store_msg())).await.unwrap();
handler.send_msg(AllMessages::NetworkBridge(test_network_bridge_msg())).await.unwrap();
handler.send_msg(AllMessages::ChainApi(test_chain_api_msg())).await.unwrap();
// send a stop signal to each subsystems
handler.stop().await.unwrap();
select! {
res = overseer_fut => {
assert_eq!(stop_signals_received.load(atomic::Ordering::SeqCst), NUM_SUBSYSTEMS);
// x2 because of broadcast_signal on startup
assert_eq!(signals_received.load(atomic::Ordering::SeqCst), 2 * NUM_SUBSYSTEMS);
// -1 for BitfieldSigning
assert_eq!(msgs_received.load(atomic::Ordering::SeqCst), NUM_SUBSYSTEMS - 1);
assert!(res.is_ok());
},
complete => (),
}
});
}