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refactor: merge standalone and metasrv table metadata allocators
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,193 @@ | ||
| // 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::collections::HashMap; | ||
| use std::sync::Arc; | ||
|
|
||
| use async_trait::async_trait; | ||
| use common_catalog::consts::METRIC_ENGINE; | ||
| use common_telemetry::{debug, info}; | ||
| use snafu::ensure; | ||
| use store_api::storage::{RegionId, RegionNumber, TableId}; | ||
|
|
||
| use crate::ddl::{TableMetadata, TableMetadataAllocatorContext}; | ||
| use crate::error::{Result, UnsupportedSnafu}; | ||
| use crate::key::table_route::{LogicalTableRouteValue, PhysicalTableRouteValue, TableRouteValue}; | ||
| use crate::peer::Peer; | ||
| use crate::rpc::ddl::CreateTableTask; | ||
| use crate::rpc::router::{Region, RegionRoute}; | ||
| use crate::sequence::SequenceRef; | ||
| use crate::wal::{allocate_region_wal_options, WalOptionsAllocatorRef}; | ||
|
|
||
| pub struct TableMetadataAllocator { | ||
| table_id_sequence: SequenceRef, | ||
| wal_options_allocator: WalOptionsAllocatorRef, | ||
| peer_allocator: PeerAllocatorRef, | ||
| } | ||
|
|
||
| impl TableMetadataAllocator { | ||
| pub fn new( | ||
| table_id_sequence: SequenceRef, | ||
| wal_options_allocator: WalOptionsAllocatorRef, | ||
| ) -> Self { | ||
| Self::with_peer_allocator( | ||
| table_id_sequence, | ||
| wal_options_allocator, | ||
| Arc::new(NoopPeerAllocator), | ||
| ) | ||
| } | ||
|
|
||
| pub fn with_peer_allocator( | ||
| table_id_sequence: SequenceRef, | ||
| wal_options_allocator: WalOptionsAllocatorRef, | ||
| peer_allocator: PeerAllocatorRef, | ||
| ) -> Self { | ||
| Self { | ||
| table_id_sequence, | ||
| wal_options_allocator, | ||
| peer_allocator, | ||
| } | ||
| } | ||
|
|
||
| async fn allocate_table_id(&self, task: &CreateTableTask) -> Result<TableId> { | ||
| let table_id = if let Some(table_id) = &task.create_table.table_id { | ||
| let table_id = table_id.id; | ||
|
|
||
| ensure!( | ||
| !self | ||
| .table_id_sequence | ||
| .min_max() | ||
| .await | ||
| .contains(&(table_id as u64)), | ||
| UnsupportedSnafu { | ||
| operation: format!( | ||
| "create table by id {} that is reserved in this node", | ||
| table_id | ||
| ) | ||
| } | ||
| ); | ||
|
|
||
| info!( | ||
| "Received explicitly allocated table id {}, will use it directly.", | ||
| table_id | ||
| ); | ||
|
|
||
| table_id | ||
| } else { | ||
| self.table_id_sequence.next().await? as TableId | ||
| }; | ||
| Ok(table_id) | ||
| } | ||
|
|
||
| fn create_wal_options( | ||
| &self, | ||
| table_route: &TableRouteValue, | ||
| ) -> Result<HashMap<RegionNumber, String>> { | ||
| match table_route { | ||
| TableRouteValue::Physical(x) => { | ||
| let region_numbers = x | ||
| .region_routes | ||
| .iter() | ||
| .map(|route| route.region.id.region_number()) | ||
| .collect(); | ||
| allocate_region_wal_options(region_numbers, &self.wal_options_allocator) | ||
| } | ||
| TableRouteValue::Logical(_) => Ok(HashMap::new()), | ||
| } | ||
| } | ||
|
|
||
| async fn create_table_route( | ||
| &self, | ||
| ctx: &TableMetadataAllocatorContext, | ||
| table_id: TableId, | ||
| task: &CreateTableTask, | ||
| ) -> Result<TableRouteValue> { | ||
| let regions = task.partitions.len(); | ||
|
|
||
| let table_route = if task.create_table.engine == METRIC_ENGINE { | ||
| TableRouteValue::Logical(LogicalTableRouteValue {}) | ||
| } else { | ||
| let peers = self.peer_allocator.alloc(ctx, regions).await?; | ||
|
|
||
| let region_routes = task | ||
| .partitions | ||
| .iter() | ||
| .enumerate() | ||
| .map(|(i, partition)| { | ||
| let region = Region { | ||
| id: RegionId::new(table_id, i as u32), | ||
| partition: Some(partition.clone().into()), | ||
| ..Default::default() | ||
| }; | ||
|
|
||
| let peer = peers[i % peers.len()].clone(); | ||
|
|
||
| RegionRoute { | ||
| region, | ||
| leader_peer: Some(peer), | ||
| ..Default::default() | ||
| } | ||
| }) | ||
| .collect::<Vec<_>>(); | ||
| TableRouteValue::Physical(PhysicalTableRouteValue::new(region_routes)) | ||
| }; | ||
| Ok(table_route) | ||
| } | ||
| pub async fn create( | ||
| &self, | ||
| ctx: &TableMetadataAllocatorContext, | ||
| task: &CreateTableTask, | ||
| ) -> Result<TableMetadata> { | ||
| let table_id = self.allocate_table_id(task).await?; | ||
|
|
||
| let table_route = self.create_table_route(ctx, table_id, task).await?; | ||
|
|
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| let region_wal_options = self.create_wal_options(&table_route)?; | ||
|
|
||
| debug!( | ||
| "Allocated region wal options {:?} for table {}", | ||
| region_wal_options, table_id | ||
| ); | ||
|
|
||
| Ok(TableMetadata { | ||
| table_id, | ||
| table_route, | ||
| region_wal_options, | ||
| }) | ||
| } | ||
| } | ||
|
|
||
| pub type PeerAllocatorRef = Arc<dyn PeerAllocator>; | ||
|
|
||
| /// [PeerAllocator] allocates [Peer]s for creating regions. | ||
| #[async_trait] | ||
| pub trait PeerAllocator: Send + Sync { | ||
| /// Allocates `regions` size [Peer]s. | ||
| /// Note that the returned [Peer]s do not need to be the same with `regions`. | ||
| async fn alloc(&self, ctx: &TableMetadataAllocatorContext, regions: usize) | ||
| -> Result<Vec<Peer>>; | ||
| } | ||
|
|
||
| struct NoopPeerAllocator; | ||
|
|
||
| #[async_trait] | ||
| impl PeerAllocator for NoopPeerAllocator { | ||
| async fn alloc( | ||
| &self, | ||
| _ctx: &TableMetadataAllocatorContext, | ||
| regions: usize, | ||
| ) -> Result<Vec<Peer>> { | ||
| Ok(vec![Peer::default(); regions]) | ||
| } | ||
| } |
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