risingwave_frontend/session/
current.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 pgwire::pg_protocol::CURRENT_SESSION;
16
17use super::SessionImpl;
18
19fn with_current_session<R>(f: impl FnOnce(&SessionImpl) -> R) -> Option<R> {
20    CURRENT_SESSION
21        .try_with(|s| s.upgrade().and_then(|s| s.downcast_ref().map(f)))
22        .ok()
23        .flatten()
24}
25
26/// Send a notice to the user, if currently in the context of a session.
27pub(crate) fn notice_to_user(str: impl Into<String>) {
28    let _ = with_current_session(|s| s.notice_to_user(str));
29}
risingwave_frontend/session/current.rs

risingwave_frontend/session/
current.rs
