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Check unbounded channel first when polling for subsystem mesages (#5566)

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* Prefer unbounded channel when selecting rx events

* Fix tests

* Forgotten fmt recursion

* Extract strategy functor to allow easier modifications
This commit is contained in:
Vsevolod Stakhov
2022-05-27 17:17:33 +01:00
committed by GitHub
parent 13900dfeea
commit 6fa4a0e3c7
3 changed files with 18 additions and 6 deletions
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polkadot/node/orchestra/src/lib.rs
+9 -2
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@@ -76,7 +76,7 @@ pub use futures::{
channel::{mpsc, oneshot},
future::{BoxFuture, Fuse, Future},
poll, select,
stream::{self, select, FuturesUnordered},
stream::{self, select, select_with_strategy, FuturesUnordered, PollNext},
task::{Context, Poll},
FutureExt, StreamExt,
};
@@ -203,10 +203,17 @@ pub fn make_packet<T>(signals_received: usize, message: T) -> MessagePacket<T> {
MessagePacket { signals_received, message }
}
/// A functor to specify strategy of the channels selection in the `SubsystemIncomingMessages`
pub fn select_message_channel_strategy(_: &mut ()) -> PollNext {
PollNext::Right
}
/// Incoming messages from both the bounded and unbounded channel.
pub type SubsystemIncomingMessages<M> = self::stream::Select<
pub type SubsystemIncomingMessages<M> = self::stream::SelectWithStrategy<
self::metered::MeteredReceiver<MessagePacket<M>>,
self::metered::UnboundedMeteredReceiver<MessagePacket<M>>,
fn(&mut ()) -> self::stream::PollNext,
(),
>;
/// Watermark to track the received signals.