frontend/instance/
standalone.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 api::region::RegionResponse;
18use api::v1::region::{RegionRequest, RegionResponse as RegionResponseV1};
19use async_trait::async_trait;
20use client::region::check_response_header;
21use common_error::ext::BoxedError;
22use common_meta::error::{self as meta_error, Result as MetaResult};
23use common_meta::node_manager::{Datanode, DatanodeRef, FlownodeRef, NodeManager};
24use common_meta::peer::Peer;
25use common_query::request::QueryRequest;
26use common_recordbatch::SendableRecordBatchStream;
27use common_telemetry::tracing;
28use common_telemetry::tracing_context::{FutureExt, TracingContext};
29use datanode::region_server::RegionServer;
30use servers::grpc::region_server::RegionServerHandler;
31use snafu::{OptionExt, ResultExt};
32
33use crate::error::{InvalidRegionRequestSnafu, InvokeRegionServerSnafu, Result};
34
35pub struct StandaloneDatanodeManager {
36    pub region_server: RegionServer,
37    pub flow_server: FlownodeRef,
38}
39
40#[async_trait]
41impl NodeManager for StandaloneDatanodeManager {
42    async fn datanode(&self, _datanode: &Peer) -> DatanodeRef {
43        RegionInvoker::arc(self.region_server.clone())
44    }
45
46    async fn flownode(&self, _node: &Peer) -> FlownodeRef {
47        self.flow_server.clone()
48    }
49}
50
51/// Relative to [client::region::RegionRequester]
52pub struct RegionInvoker {
53    region_server: RegionServer,
54}
55
56impl RegionInvoker {
57    pub fn arc(region_server: RegionServer) -> Arc<Self> {
58        Arc::new(Self { region_server })
59    }
60
61    async fn handle_inner(&self, request: RegionRequest) -> Result<RegionResponseV1> {
62        let body = request.body.with_context(|| InvalidRegionRequestSnafu {
63            reason: "body not found",
64        })?;
65
66        self.region_server
67            .handle(body)
68            .await
69            .context(InvokeRegionServerSnafu)
70    }
71}
72
73#[async_trait]
74impl Datanode for RegionInvoker {
75    async fn handle(&self, request: RegionRequest) -> MetaResult<RegionResponse> {
76        let span = request
77            .header
78            .as_ref()
79            .map(|h| TracingContext::from_w3c(&h.tracing_context))
80            .unwrap_or_default()
81            .attach(tracing::info_span!("RegionInvoker::handle_region_request"));
82        let response = self
83            .handle_inner(request)
84            .trace(span)
85            .await
86            .map_err(BoxedError::new)
87            .context(meta_error::ExternalSnafu)?;
88        check_response_header(&response.header)
89            .map_err(BoxedError::new)
90            .context(meta_error::ExternalSnafu)?;
91        Ok(RegionResponse::from_region_response(response))
92    }
93
94    async fn handle_query(&self, request: QueryRequest) -> MetaResult<SendableRecordBatchStream> {
95        let span = request
96            .header
97            .as_ref()
98            .map(|h| TracingContext::from_w3c(&h.tracing_context))
99            .unwrap_or_default()
100            .attach(tracing::info_span!("RegionInvoker::handle_query"));
101        self.region_server
102            .handle_read(request)
103            .trace(span)
104            .await
105            .map_err(BoxedError::new)
106            .context(meta_error::ExternalSnafu)
107    }
108}
frontend/instance/standalone.rs

frontend/instance/
standalone.rs
