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refactor: merge standalone and metasrv table metadata allocators (#3035)
* refactor: merge standalone and metasrv table metadata allocators * Update src/common/meta/src/ddl/table_meta.rs Co-authored-by: niebayes <[email protected]> * Update src/common/meta/src/ddl/table_meta.rs Co-authored-by: Weny Xu <[email protected]> --------- Co-authored-by: niebayes <[email protected]> Co-authored-by: Weny Xu <[email protected]>
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// 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; | ||
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||
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}; | ||
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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}; | ||
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pub struct TableMetadataAllocator { | ||
table_id_sequence: SequenceRef, | ||
wal_options_allocator: WalOptionsAllocatorRef, | ||
peer_allocator: PeerAllocatorRef, | ||
} | ||
|
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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), | ||
) | ||
} | ||
|
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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, | ||
} | ||
} | ||
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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; | ||
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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 | ||
) | ||
} | ||
); | ||
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info!( | ||
"Received explicitly allocated table id {}, will use it directly.", | ||
table_id | ||
); | ||
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table_id | ||
} else { | ||
self.table_id_sequence.next().await? as TableId | ||
}; | ||
Ok(table_id) | ||
} | ||
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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()), | ||
} | ||
} | ||
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async fn create_table_route( | ||
&self, | ||
ctx: &TableMetadataAllocatorContext, | ||
table_id: TableId, | ||
task: &CreateTableTask, | ||
) -> Result<TableRouteValue> { | ||
let regions = task.partitions.len(); | ||
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let table_route = if task.create_table.engine == METRIC_ENGINE { | ||
TableRouteValue::Logical(LogicalTableRouteValue {}) | ||
} else { | ||
let peers = self.peer_allocator.alloc(ctx, regions).await?; | ||
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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() | ||
}; | ||
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let peer = peers[i % peers.len()].clone(); | ||
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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?; | ||
let region_wal_options = self.create_wal_options(&table_route)?; | ||
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debug!( | ||
"Allocated region wal options {:?} for table {}", | ||
region_wal_options, table_id | ||
); | ||
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Ok(TableMetadata { | ||
table_id, | ||
table_route, | ||
region_wal_options, | ||
}) | ||
} | ||
} | ||
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pub type PeerAllocatorRef = Arc<dyn PeerAllocator>; | ||
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/// [PeerAllocator] allocates [Peer]s for creating regions. | ||
#[async_trait] | ||
pub trait PeerAllocator: Send + Sync { | ||
/// Allocates `regions` size [Peer]s. | ||
async fn alloc(&self, ctx: &TableMetadataAllocatorContext, regions: usize) | ||
-> Result<Vec<Peer>>; | ||
} | ||
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struct NoopPeerAllocator; | ||
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#[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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