1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28

use thiserror::Error;
use tokio::sync::{mpsc::error::SendError, oneshot::error::RecvError};

/// An error that occurred while trying to batch.
#[derive(Error, Debug)]
pub enum BatchError {
    /// Something went wrong while submitting an input for processing.
    #[error("Unable to send item to the worker for batching: channel closed")]
    Tx,

    /// Something went wrong while waiting for the output of a batch.
    #[error("Error while waiting for batch results: channel closed. {}", .0)]
    Rx(RecvError),
}

pub type Result<T> = std::result::Result<T, BatchError>;

impl From<RecvError> for BatchError {
    fn from(rx_err: RecvError) -> Self {
        BatchError::Rx(rx_err)
    }
}

impl<T> From<SendError<T>> for BatchError {
    fn from(_tx_err: SendError<T>) -> Self {
        BatchError::Tx
    }
}