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api.go
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api.go
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/*
Copyright 2020 The Vitess Authors.
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 tx
import (
"fmt"
"strings"
"time"
querypb "vitess.io/vitess/go/vt/proto/query"
vtrpcpb "vitess.io/vitess/go/vt/proto/vtrpc"
"vitess.io/vitess/go/vt/servenv"
"vitess.io/vitess/go/vt/sqlparser"
)
type (
// ConnID as type int64
ConnID = int64
//DTID as type string
DTID = string
//EngineStateMachine is used to control the state the transactional engine -
//whether new connections and/or transactions are allowed or not.
EngineStateMachine interface {
Init() error
AcceptReadWrite() error
AcceptReadOnly() error
StopGently()
}
// ReleaseReason as type int
ReleaseReason int
//Properties contains all information that is related to the currently running
//transaction on the connection
Properties struct {
EffectiveCaller *vtrpcpb.CallerID
ImmediateCaller *querypb.VTGateCallerID
StartTime time.Time
EndTime time.Time
Queries []string
Autocommit bool
Conclusion string
LogToFile bool
Stats *servenv.TimingsWrapper
}
)
const (
// TxClose - connection released on close.
TxClose ReleaseReason = iota
// TxCommit - connection released on commit.
TxCommit
// TxRollback - connection released on rollback.
TxRollback
// TxKill - connection released on tx kill.
TxKill
// ConnInitFail - connection released on failed to start tx.
ConnInitFail
// ConnRelease - connection closed.
ConnRelease
// ConnRenewFail - reserve connection renew failed.
ConnRenewFail
)
func (r ReleaseReason) String() string {
return txResolutions[r]
}
// Name return the name of enum.
func (r ReleaseReason) Name() string {
return txNames[r]
}
var txResolutions = map[ReleaseReason]string{
TxClose: "closed",
TxCommit: "transaction committed",
TxRollback: "transaction rolled back",
TxKill: "kill",
ConnInitFail: "initFail",
ConnRelease: "release connection",
ConnRenewFail: "connection renew failed",
}
var txNames = map[ReleaseReason]string{
TxClose: "close",
TxCommit: "commit",
TxRollback: "rollback",
TxKill: "kill",
ConnInitFail: "initFail",
ConnRelease: "release",
ConnRenewFail: "renewFail",
}
// RecordQuery records the query against this transaction.
func (p *Properties) RecordQuery(query string) {
if p == nil {
return
}
p.Queries = append(p.Queries, query)
}
// InTransaction returns true as soon as this struct is not nil
func (p *Properties) InTransaction() bool { return p != nil }
// String returns a printable version of the transaction
func (p *Properties) String(sanitize bool) string {
if p == nil {
return ""
}
printQueries := func() string {
sb := strings.Builder{}
for _, query := range p.Queries {
if sanitize {
query, _ = sqlparser.RedactSQLQuery(query)
}
sb.WriteString(query)
sb.WriteString(";")
}
return sb.String()
}
return fmt.Sprintf(
"'%v'\t'%v'\t%v\t%v\t%.6f\t%v\t%v\t\n",
p.EffectiveCaller,
p.ImmediateCaller,
p.StartTime.Format(time.StampMicro),
p.EndTime.Format(time.StampMicro),
p.EndTime.Sub(p.StartTime).Seconds(),
p.Conclusion,
printQueries(),
)
}