query/
region_query.rs

1// Copyright 2023 Greptime Team
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 std::sync::Arc;
16
17use async_trait::async_trait;
18use common_meta::node_manager::NodeManagerRef;
19use common_query::request::QueryRequest;
20use common_recordbatch::SendableRecordBatchStream;
21use partition::manager::PartitionRuleManagerRef;
22use session::ReadPreference;
23
24use crate::error::Result;
25
26/// A factory to create a [`RegionQueryHandler`].
27pub trait RegionQueryHandlerFactory: Send + Sync {
28    /// Build a [`RegionQueryHandler`] with the given partition manager and node manager.
29    fn build(
30        &self,
31        partition_manager: PartitionRuleManagerRef,
32        node_manager: NodeManagerRef,
33    ) -> RegionQueryHandlerRef;
34}
35
36pub type RegionQueryHandlerFactoryRef = Arc<dyn RegionQueryHandlerFactory>;
37
38#[async_trait]
39pub trait RegionQueryHandler: Send + Sync {
40    async fn do_get(
41        &self,
42        read_preference: ReadPreference,
43        request: QueryRequest,
44    ) -> Result<SendableRecordBatchStream>;
45}
46
47pub type RegionQueryHandlerRef = Arc<dyn RegionQueryHandler>;
query/region_query.rs

query/
region_query.rs
