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refactor: move create database to procedure
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,140 @@ | ||
| // 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 async_trait::async_trait; | ||
| use common_procedure::error::{FromJsonSnafu, Result as ProcedureResult, ToJsonSnafu}; | ||
| use common_procedure::{Context as ProcedureContext, LockKey, Procedure, Status}; | ||
| use serde::{Deserialize, Serialize}; | ||
| use snafu::{ensure, ResultExt}; | ||
| use strum::AsRefStr; | ||
|
|
||
| use crate::ddl::utils::handle_retry_error; | ||
| use crate::ddl::DdlContext; | ||
| use crate::error::{self, Result}; | ||
| use crate::key::schema_name::SchemaNameKey; | ||
| use crate::lock_key::CatalogLock; | ||
|
|
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| pub struct CreateDatabaseProcedure { | ||
| pub context: DdlContext, | ||
| pub data: CreateDatabaseData, | ||
| } | ||
|
|
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| impl CreateDatabaseProcedure { | ||
| pub const TYPE_NAME: &'static str = "metasrv-procedure::CreateDatabase"; | ||
|
|
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| pub fn new( | ||
| catalog: String, | ||
| schema: String, | ||
| create_if_not_exists: bool, | ||
| context: DdlContext, | ||
| ) -> Self { | ||
| Self { | ||
| context: context, | ||
| data: CreateDatabaseData { | ||
| state: CreateDatabaseState::Prepare, | ||
| catalog: catalog, | ||
| schema: schema, | ||
| create_if_not_exists: create_if_not_exists, | ||
| }, | ||
| } | ||
| } | ||
|
|
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| pub fn from_json(json: &str, context: DdlContext) -> ProcedureResult<Self> { | ||
| let data = serde_json::from_str(json).context(FromJsonSnafu)?; | ||
|
|
||
| Ok(Self { | ||
| context: context, | ||
| data: data, | ||
| }) | ||
| } | ||
|
|
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| pub async fn on_prepare(&mut self) -> Result<Status> { | ||
| let exists = self | ||
| .context | ||
| .table_metadata_manager | ||
| .schema_manager() | ||
| .exists(SchemaNameKey::new(&self.data.catalog, &self.data.schema)) | ||
| .await?; | ||
|
|
||
| if exists && self.data.create_if_not_exists { | ||
| return Ok(Status::done()); | ||
| } | ||
|
|
||
| ensure!( | ||
| !exists, | ||
| error::SchemaAlreadyExistsSnafu { | ||
| catalog: &self.data.catalog, | ||
| schema: &self.data.schema, | ||
| } | ||
| ); | ||
|
|
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| self.data.state = CreateDatabaseState::CreateMetadata; | ||
| Ok(Status::executing(true)) | ||
| } | ||
|
|
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| pub async fn on_create_metadata(&mut self) -> Result<Status> { | ||
| self.context | ||
| .table_metadata_manager | ||
| .schema_manager() | ||
| .create( | ||
| SchemaNameKey::new(&self.data.catalog, &self.data.schema), | ||
| None, | ||
| false, | ||
| ) | ||
| .await?; | ||
|
|
||
| Ok(Status::done()) | ||
| } | ||
| } | ||
|
|
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| #[async_trait] | ||
| impl Procedure for CreateDatabaseProcedure { | ||
| fn type_name(&self) -> &str { | ||
| Self::TYPE_NAME | ||
| } | ||
|
|
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| async fn execute(&mut self, _ctx: &ProcedureContext) -> ProcedureResult<Status> { | ||
| let state = &self.data.state; | ||
|
|
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| match state { | ||
| CreateDatabaseState::Prepare => self.on_prepare().await, | ||
| CreateDatabaseState::CreateMetadata => self.on_create_metadata().await, | ||
| } | ||
| .map_err(handle_retry_error) | ||
| } | ||
|
|
||
| fn dump(&self) -> ProcedureResult<String> { | ||
| serde_json::to_string(&self.data).context(ToJsonSnafu) | ||
| } | ||
|
|
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| fn lock_key(&self) -> LockKey { | ||
| let lock_key = vec![CatalogLock::Read(&self.data.catalog).into()]; | ||
|
|
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| LockKey::new(lock_key) | ||
| } | ||
| } | ||
|
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| #[derive(Debug, Clone, Serialize, Deserialize, AsRefStr)] | ||
| pub enum CreateDatabaseState { | ||
| Prepare, | ||
| CreateMetadata, | ||
| } | ||
|
|
||
| #[derive(Debug, Serialize, Deserialize)] | ||
| pub struct CreateDatabaseData { | ||
| pub state: CreateDatabaseState, | ||
| pub catalog: String, | ||
| pub schema: String, | ||
| pub create_if_not_exists: bool, | ||
| } |
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