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tx.go
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tx.go
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// Copyright 2020 Google Inc. All Rights Reserved.
//
// 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 spannerdriver
import (
"context"
"cloud.google.com/go/spanner"
"github.com/rakyll/go-sql-driver-spanner/internal"
)
type roTx struct {
close func()
}
func (tx *roTx) Commit() error {
tx.close()
return nil
}
func (tx *roTx) Rollback() error {
tx.close()
return nil
}
type rwTx struct {
connector *internal.RWConnector
close func()
}
func (tx *rwTx) Query(ctx context.Context, stmt spanner.Statement) *spanner.RowIterator {
tx.connector.QueryIn <- &internal.RWQueryMessage{
Ctx: ctx,
Stmt: stmt,
}
msg := <-tx.connector.QueryOut
return msg.It
}
func (tx *rwTx) ExecContext(ctx context.Context, stmt spanner.Statement) (int64, error) {
tx.connector.ExecIn <- &internal.RWExecMessage{
Ctx: ctx,
Stmt: stmt,
}
msg := <-tx.connector.ExecOut
return msg.Rows, msg.Error
}
func (tx *rwTx) Commit() error {
tx.connector.CommitIn <- struct{}{}
err := <-tx.connector.Errors
if err == nil {
tx.close()
}
return err
}
func (tx *rwTx) Rollback() error {
tx.connector.RollbackIn <- struct{}{}
err := <-tx.connector.Errors
if err == internal.ErrAborted {
tx.close()
return nil
}
return err
}