risingwave_stream/executor/backfill/snapshot_backfill/
utils.rs

1// Copyright 2025 RisingWave Labs
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7//     http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15use anyhow::anyhow;
16use tokio::sync::mpsc::UnboundedReceiver;
17
18use crate::executor::{Barrier, StreamExecutorResult};
19
20pub(super) async fn receive_next_barrier(
21    barrier_rx: &mut UnboundedReceiver<Barrier>,
22) -> StreamExecutorResult<Barrier> {
23    Ok(barrier_rx
24        .recv()
25        .await
26        .ok_or_else(|| anyhow!("end of barrier receiver"))?)
27}