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* feat: add ddl client * chore: apply suggestions from CR * chore: apply suggestions from CR
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,145 @@ | ||
| // Copyright 2023 Greptime Team | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| use std::sync::Arc; | ||
|
|
||
| use api::v1::meta::ddl_task_client::DdlTaskClient; | ||
| use api::v1::meta::{ErrorCode, Role, SubmitDdlTaskRequest, SubmitDdlTaskResponse}; | ||
| use common_grpc::channel_manager::ChannelManager; | ||
| use snafu::{ensure, ResultExt}; | ||
| use tokio::sync::RwLock; | ||
| use tonic::transport::Channel; | ||
|
|
||
| use crate::client::heartbeat::Inner as HeartbeatInner; | ||
| use crate::client::Id; | ||
| use crate::error; | ||
| use crate::error::Result; | ||
|
|
||
| #[derive(Clone, Debug)] | ||
| // TODO(weny): removes this in following PRs. | ||
| #[allow(unused)] | ||
| pub struct Client { | ||
| inner: Arc<RwLock<Inner>>, | ||
| } | ||
|
|
||
| // TODO(weny): removes this in following PRs. | ||
| #[allow(dead_code)] | ||
| impl Client { | ||
| pub fn new(id: Id, role: Role, channel_manager: ChannelManager) -> Self { | ||
| let inner = Arc::new(RwLock::new(Inner { | ||
| id, | ||
| role, | ||
| channel_manager: channel_manager.clone(), | ||
| heartbeat_inner: HeartbeatInner::new(id, role, channel_manager), | ||
| })); | ||
|
|
||
| Self { inner } | ||
| } | ||
|
|
||
| pub async fn start<U, A>(&mut self, urls: A) -> Result<()> | ||
| where | ||
| U: AsRef<str>, | ||
| A: AsRef<[U]>, | ||
| { | ||
| let mut inner = self.inner.write().await; | ||
| inner.start(urls).await | ||
| } | ||
|
|
||
| pub async fn is_started(&self) -> bool { | ||
| let inner = self.inner.read().await; | ||
| inner.is_started() | ||
| } | ||
|
|
||
| pub async fn submit_ddl_task( | ||
| &self, | ||
| req: SubmitDdlTaskRequest, | ||
| ) -> Result<SubmitDdlTaskResponse> { | ||
| let mut inner = self.inner.write().await; | ||
| inner.submit_ddl_task(req).await | ||
| } | ||
| } | ||
|
|
||
| #[derive(Debug)] | ||
| // TODO(weny): removes this in following PRs. | ||
| #[allow(unused)] | ||
| struct Inner { | ||
| id: Id, | ||
| role: Role, | ||
| channel_manager: ChannelManager, | ||
| heartbeat_inner: HeartbeatInner, | ||
| } | ||
|
|
||
| impl Inner { | ||
| async fn start<U, A>(&mut self, urls: A) -> Result<()> | ||
| where | ||
| U: AsRef<str>, | ||
| A: AsRef<[U]>, | ||
| { | ||
| ensure!( | ||
| !self.is_started(), | ||
| error::IllegalGrpcClientStateSnafu { | ||
| err_msg: "Router client already started", | ||
| } | ||
| ); | ||
|
|
||
| self.heartbeat_inner.start(urls).await?; | ||
| Ok(()) | ||
| } | ||
|
|
||
| fn make_client(&self, addr: impl AsRef<str>) -> Result<DdlTaskClient<Channel>> { | ||
| let channel = self | ||
| .channel_manager | ||
| .get(addr) | ||
| .context(error::CreateChannelSnafu)?; | ||
|
|
||
| Ok(DdlTaskClient::new(channel)) | ||
| } | ||
|
|
||
| #[inline] | ||
| fn is_started(&self) -> bool { | ||
| self.heartbeat_inner.is_started() | ||
| } | ||
|
|
||
| pub async fn submit_ddl_task( | ||
| &mut self, | ||
| mut req: SubmitDdlTaskRequest, | ||
| ) -> Result<SubmitDdlTaskResponse> { | ||
| req.set_header(self.id, self.role); | ||
|
|
||
| loop { | ||
| if let Some(leader) = &self.heartbeat_inner.get_leader() { | ||
| let mut client = self.make_client(leader)?; | ||
| let res = client | ||
| .submit_ddl_task(req.clone()) | ||
| .await | ||
| .context(error::TonicStatusSnafu)?; | ||
|
|
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| let res = res.into_inner(); | ||
|
|
||
| if let Some(header) = res.header.as_ref() { | ||
| if let Some(err) = header.error.as_ref() { | ||
| if err.code == ErrorCode::NotLeader as i32 { | ||
| self.heartbeat_inner.ask_leader().await?; | ||
| continue; | ||
| } | ||
| } | ||
| } | ||
|
|
||
| return Ok(res); | ||
| } else if let Err(err) = self.heartbeat_inner.ask_leader().await { | ||
| return Err(err); | ||
| } | ||
| } | ||
| } | ||
| } |
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