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common.go
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common.go
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// Copyright (c) 2018 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package sql
import (
"bytes"
"context"
"encoding/binary"
"encoding/gob"
"fmt"
"github.com/uber/cadence/common/log"
"github.com/uber/cadence/common/log/tag"
"github.com/uber/cadence/common/persistence"
p "github.com/uber/cadence/common/persistence"
"github.com/uber/cadence/common/persistence/serialization"
"github.com/uber/cadence/common/persistence/sql/sqlplugin"
"github.com/uber/cadence/common/types"
)
// TODO: Rename all SQL Managers to Stores
type sqlStore struct {
db sqlplugin.DB
logger log.Logger
parser serialization.Parser
dc *p.DynamicConfiguration
}
func (m *sqlStore) GetName() string {
return m.db.PluginName()
}
func (m *sqlStore) Close() {
if m.db != nil {
m.db.Close()
}
}
func (m *sqlStore) useAsyncTransaction() bool {
return m.db.SupportsAsyncTransaction() && m.dc != nil && m.dc.EnableSQLAsyncTransaction()
}
func (m *sqlStore) txExecute(ctx context.Context, dbShardID int, operation string, f func(tx sqlplugin.Tx) error) error {
tx, err := m.db.BeginTx(ctx, dbShardID)
if err != nil {
return convertCommonErrors(m.db, operation, "Failed to start transaction.", err)
}
err = f(tx)
if err != nil {
rollBackErr := tx.Rollback()
if rollBackErr != nil {
m.logger.Error("transaction rollback error", tag.Error(rollBackErr))
}
return convertCommonErrors(m.db, operation, "", err)
}
if err := tx.Commit(); err != nil {
return convertCommonErrors(m.db, operation, "Failed to commit transaction.", err)
}
return nil
}
func gobSerialize(x interface{}) ([]byte, error) {
b := bytes.Buffer{}
e := gob.NewEncoder(&b)
err := e.Encode(x)
if err != nil {
return nil, &types.InternalServiceError{
Message: fmt.Sprintf("Error in serialization: %v", err),
}
}
return b.Bytes(), nil
}
func gobDeserialize(a []byte, x interface{}) error {
b := bytes.NewBuffer(a)
d := gob.NewDecoder(b)
err := d.Decode(x)
if err != nil {
return &types.InternalServiceError{
Message: fmt.Sprintf("Error in deserialization: %v", err),
}
}
return nil
}
func serializePageToken(offset int64) []byte {
b := make([]byte, 8)
binary.LittleEndian.PutUint64(b, uint64(offset))
return b
}
func deserializePageToken(payload []byte) (int64, error) {
if len(payload) != 8 {
return 0, fmt.Errorf("invalid token of %v length", len(payload))
}
return int64(binary.LittleEndian.Uint64(payload)), nil
}
func convertCommonErrors(
errChecker sqlplugin.ErrorChecker,
operation, message string,
err error,
) error {
switch err.(type) {
case *persistence.ConditionFailedError,
*persistence.CurrentWorkflowConditionFailedError,
*persistence.WorkflowExecutionAlreadyStartedError,
*persistence.ShardOwnershipLostError,
*persistence.TimeoutError,
*types.DomainAlreadyExistsError,
*types.EntityNotExistsError,
*types.ServiceBusyError,
*types.InternalServiceError:
return err
}
if errChecker.IsNotFoundError(err) {
return &types.EntityNotExistsError{
Message: fmt.Sprintf("%v failed. %s Error: %v ", operation, message, err),
}
}
if errChecker.IsTimeoutError(err) {
return &persistence.TimeoutError{Msg: fmt.Sprintf("%v timed out. %s Error: %v", operation, message, err)}
}
if errChecker.IsThrottlingError(err) {
return &types.ServiceBusyError{
Message: fmt.Sprintf("%v operation failed. %s Error: %v", operation, message, err),
}
}
return &types.InternalServiceError{
Message: fmt.Sprintf("%v operation failed. %s Error: %v", operation, message, err),
}
}