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at_executor.go
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at_executor.go
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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 at
import (
"context"
"github.com/seata/seata-go/pkg/datasource/sql/exec"
"github.com/seata/seata-go/pkg/datasource/sql/parser"
"github.com/seata/seata-go/pkg/datasource/sql/types"
"github.com/seata/seata-go/pkg/datasource/sql/util"
"github.com/seata/seata-go/pkg/tm"
)
func Init() {
exec.RegisterATExecutor(types.DBTypeMySQL, func() exec.SQLExecutor { return &ATExecutor{} })
}
type executor interface {
ExecContext(ctx context.Context, f exec.CallbackWithNamedValue) (types.ExecResult, error)
}
type ATExecutor struct {
hooks []exec.SQLHook
}
func (e *ATExecutor) Interceptors(hooks []exec.SQLHook) {
e.hooks = hooks
}
// ExecWithNamedValue find the executor by sql type
func (e *ATExecutor) ExecWithNamedValue(ctx context.Context, execCtx *types.ExecContext, f exec.CallbackWithNamedValue) (types.ExecResult, error) {
queryParser, err := parser.DoParser(execCtx.Query)
if err != nil {
return nil, err
}
var executor executor
if !tm.IsGlobalTx(ctx) {
executor = NewPlainExecutor(queryParser, execCtx)
} else {
switch queryParser.SQLType {
case types.SQLTypeInsert:
executor = NewInsertExecutor(queryParser, execCtx, e.hooks)
case types.SQLTypeUpdate:
executor = NewUpdateExecutor(queryParser, execCtx, e.hooks)
case types.SQLTypeDelete:
executor = NewDeleteExecutor(queryParser, execCtx, e.hooks)
case types.SQLTypeSelectForUpdate:
executor = NewSelectForUpdateExecutor(queryParser, execCtx, e.hooks)
case types.SQLTypeInsertOnDuplicateUpdate:
executor = NewInsertOnUpdateExecutor(queryParser, execCtx, e.hooks)
case types.SQLTypeMulti:
executor = NewMultiExecutor(queryParser, execCtx, e.hooks)
default:
executor = NewPlainExecutor(queryParser, execCtx)
}
}
return executor.ExecContext(ctx, f)
}
// ExecWithValue transfer value to nameValue execute
func (e *ATExecutor) ExecWithValue(ctx context.Context, execCtx *types.ExecContext, f exec.CallbackWithNamedValue) (types.ExecResult, error) {
execCtx.NamedValues = util.ValueToNamedValue(execCtx.Values)
return e.ExecWithNamedValue(ctx, execCtx, f)
}