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engine.go
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engine.go
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// Copyright 2022 Matrix Origin
//
// 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.
package memoryengine
import (
"context"
"strings"
"time"
"github.com/matrixorigin/matrixone/pkg/clusterservice"
"github.com/matrixorigin/matrixone/pkg/common/moerr"
"github.com/matrixorigin/matrixone/pkg/pb/metadata"
pb "github.com/matrixorigin/matrixone/pkg/pb/statsinfo"
"github.com/matrixorigin/matrixone/pkg/pb/timestamp"
"github.com/matrixorigin/matrixone/pkg/sql/plan"
"github.com/matrixorigin/matrixone/pkg/txn/client"
"github.com/matrixorigin/matrixone/pkg/vm/engine"
)
// Engine is an engine.Engine impl
type Engine struct {
shardPolicy ShardPolicy
idGenerator IDGenerator
cluster clusterservice.MOCluster
}
func New(
ctx context.Context,
shardPolicy ShardPolicy,
idGenerator IDGenerator,
cluster clusterservice.MOCluster,
) *Engine {
_ = ctx
engine := &Engine{
shardPolicy: shardPolicy,
idGenerator: idGenerator,
cluster: cluster,
}
return engine
}
var _ engine.Engine = new(Engine)
func (e *Engine) New(_ context.Context, _ client.TxnOperator) error {
return nil
}
func (e *Engine) Commit(_ context.Context, _ client.TxnOperator) error {
return nil
}
func (e *Engine) Rollback(_ context.Context, _ client.TxnOperator) error {
return nil
}
func (e *Engine) NewBlockReader(_ context.Context, _ int, _ timestamp.Timestamp,
_ *plan.Expr, _ []byte, _ *plan.TableDef, _ any) ([]engine.Reader, error) {
return nil, nil
}
func (e *Engine) Create(ctx context.Context, dbName string, txnOperator client.TxnOperator) error {
id, err := e.idGenerator.NewID(ctx)
if err != nil {
return err
}
access, err := getAccessInfo(ctx)
if err != nil {
return err
}
_, err = DoTxnRequest[CreateDatabaseResp](
ctx,
txnOperator,
false,
e.allShards,
OpCreateDatabase,
&CreateDatabaseReq{
ID: id,
AccessInfo: access,
Name: dbName,
},
)
if err != nil {
return err
}
return nil
}
func (e *Engine) Database(ctx context.Context, dbName string, txnOperator client.TxnOperator) (engine.Database, error) {
access, err := getAccessInfo(ctx)
if err != nil {
return nil, err
}
resps, err := DoTxnRequest[OpenDatabaseResp](
ctx,
txnOperator,
true,
e.anyShard,
OpOpenDatabase,
&OpenDatabaseReq{
AccessInfo: access,
Name: dbName,
},
)
if err != nil {
return nil, err
}
resp := resps[0]
db := &Database{
engine: e,
txnOperator: txnOperator,
id: resp.ID,
name: resp.Name,
typ: resp.DatTyp,
createSql: resp.CreateSql,
}
return db, nil
}
func (e *Engine) Databases(ctx context.Context, txnOperator client.TxnOperator) ([]string, error) {
access, err := getAccessInfo(ctx)
if err != nil {
return nil, err
}
resps, err := DoTxnRequest[GetDatabasesResp](
ctx,
txnOperator,
true,
e.anyShard,
OpGetDatabases,
&GetDatabasesReq{
AccessInfo: access,
},
)
if err != nil {
return nil, err
}
return resps[0].Names, nil
}
func (e *Engine) Delete(ctx context.Context, dbName string, txnOperator client.TxnOperator) error {
access, err := getAccessInfo(ctx)
if err != nil {
return err
}
_, err = DoTxnRequest[DeleteDatabaseResp](
ctx,
txnOperator,
false,
e.allShards,
OpDeleteDatabase,
&DeleteDatabaseReq{
AccessInfo: access,
Name: dbName,
},
)
if err != nil {
return err
}
return nil
}
func (e *Engine) Nodes(isInternal bool, tenant string, _ string, cnLabel map[string]string) (engine.Nodes, error) {
var nodes engine.Nodes
cluster := clusterservice.GetMOCluster()
var selector clusterservice.Selector
if isInternal || strings.ToLower(tenant) == "sys" {
selector = clusterservice.NewSelector()
} else {
selector = selector.SelectByLabel(cnLabel, clusterservice.EQ)
}
cluster.GetCNService(selector,
func(c metadata.CNService) bool {
nodes = append(nodes, engine.Node{
Mcpu: 1,
Id: c.ServiceID,
Addr: c.PipelineServiceAddress,
})
return true
})
return nodes, nil
}
func (e *Engine) Hints() (h engine.Hints) {
h.CommitOrRollbackTimeout = time.Minute * 5
return
}
func (e *Engine) GetNameById(ctx context.Context, op client.TxnOperator, tableId uint64) (dbName string, tblName string, err error) {
return "", "", moerr.NewNYI(ctx, "interface GetNameById is not implemented")
}
func (e *Engine) GetRelationById(ctx context.Context, op client.TxnOperator, tableId uint64) (dbName string, tblName string, rel engine.Relation, err error) {
return "", "", nil, moerr.NewNYI(ctx, "interface GetRelationById is not implemented")
}
func (e *Engine) AllocateIDByKey(ctx context.Context, key string) (uint64, error) {
id, err := e.idGenerator.NewIDByKey(ctx, key)
return uint64(id), err
}
func (e *Engine) TryToSubscribeTable(ctx context.Context, dbID, tbID uint64) error {
return nil
}
func (e *Engine) UnsubscribeTable(ctx context.Context, dbID, tbID uint64) error {
return nil
}
func (e *Engine) Stats(ctx context.Context, key pb.StatsInfoKey, sync bool) *pb.StatsInfo {
return nil
}
func getTNServices(cluster clusterservice.MOCluster) []metadata.TNService {
var values []metadata.TNService
cluster.GetTNService(clusterservice.NewSelector(),
func(d metadata.TNService) bool {
values = append(values, d)
return true
})
return values
}