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add recv_many function #1

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add recv_many function #1

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19 changes: 19 additions & 0 deletions src/messaging.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -133,6 +133,7 @@ where
#[async_trait::async_trait]
pub trait RecvAdapter<P>: Send + Sync {
async fn recv(&mut self) -> Result<Message<P>, Error>;
async fn recv_many(&mut self, limit: usize) -> Result<Vec<Message<P>>, Error>;
}

pub trait RecvPort<A, P>
Expand Down Expand Up @@ -188,6 +189,16 @@ where

Ok(msg)
}

pub async fn recv_many(&mut self, limit: usize) -> Result<Vec<Message<P>>, Error> {
let receiver = self.receiver.as_mut().ok_or(Error::NotConnected)?;

let msgs = receiver.recv_many(limit).await?;

self.counter += msgs.len() as u64;

Ok(msgs)
}
}

impl<A, P> RecvPort<A, P> for InputPort<A, P>
Expand Down Expand Up @@ -310,6 +321,14 @@ pub mod tokio {
None => Err(Error::RecvError),
}
}

async fn recv_many(&mut self, limit: usize) -> Result<Vec<Message<P>>, Error> {
let mut buffer = Vec::with_capacity(limit);

self.0.recv_many(&mut buffer, limit).await;

Ok(buffer)
}
}

pub type OutputPort<P> = super::OutputPort<ChannelSendAdapter<P>, P>;
Expand Down