risingwave_common/system_param/
common.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 risingwave_license::LicenseManager;
16
17use super::diff::SystemParamsDiff;
18use super::reader::SystemParamsReader;
19use crate::util::tracing::layer::toggle_otel_layer;
20
21/// Node-independent handler for system parameter changes.
22#[derive(Debug)]
23pub struct CommonHandler;
24
25impl CommonHandler {
26    /// Create a new handler with the initial parameters.
27    pub fn new(initial: SystemParamsReader) -> Self {
28        let this = Self;
29        this.handle_change(&SystemParamsDiff::from_initial(initial));
30        this
31    }
32
33    /// Handle the change of system parameters.
34    pub fn handle_change(&self, diff: &SystemParamsDiff) {
35        // Toggle the distributed tracing layer.
36        if let Some(enabled) = diff.enable_tracing {
37            toggle_otel_layer(enabled);
38        }
39        // Refresh the license key.
40        if let Some(key) = diff.license_key.as_ref() {
41            LicenseManager::get().refresh(key.as_ref());
42        }
43    }
44}
risingwave_common/system_param/common.rs

risingwave_common/system_param/
common.rs
