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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,171 @@ | ||
| /* | ||
| * 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 exec | ||
|
|
||
| import ( | ||
| "context" | ||
| "database/sql/driver" | ||
| "fmt" | ||
| "io" | ||
| "strings" | ||
| "time" | ||
|
|
||
| "github.com/pkg/errors" | ||
| ) | ||
|
|
||
| type MysqlXAConn struct { | ||
| driver.Conn | ||
| } | ||
|
|
||
| func (c *MysqlXAConn) Commit(xid string, onePhase bool) error { | ||
| var sb strings.Builder | ||
| sb.WriteString("XA COMMIT ") | ||
| sb.WriteString(xid) | ||
| if onePhase { | ||
| sb.WriteString(" ONE PHASE") | ||
| } | ||
|
|
||
| conn, _ := c.Conn.(driver.ExecerContext) | ||
| _, err := conn.ExecContext(context.TODO(), sb.String(), nil) | ||
| return err | ||
| } | ||
|
|
||
| func (c *MysqlXAConn) End(xid string, flags int) error { | ||
| var sb strings.Builder | ||
| sb.WriteString("XA END ") | ||
| sb.WriteString(xid) | ||
|
|
||
| switch flags { | ||
| case TMSUCCESS: | ||
| break | ||
| case TMSUSPEND: | ||
| sb.WriteString(" SUSPEND") | ||
| break | ||
| case TMFAIL: | ||
| break | ||
| default: | ||
| return errors.New("invalid arguments") | ||
| } | ||
|
|
||
| conn, _ := c.Conn.(driver.ExecerContext) | ||
| _, err := conn.ExecContext(context.TODO(), sb.String(), nil) | ||
| return err | ||
| } | ||
|
|
||
| func (c *MysqlXAConn) Forget(xid string) error { | ||
| // mysql doesn't support this | ||
| return errors.New("mysql doesn't support this") | ||
| } | ||
|
|
||
| func (c *MysqlXAConn) GetTransactionTimeout() time.Duration { | ||
| return 0 | ||
| } | ||
|
|
||
| // IsSameRM is called to determine if the resource manager instance represented by the target object | ||
| // is the same as the resource manager instance represented by the parameter xares. | ||
| func (c *MysqlXAConn) IsSameRM(xares XAResource) bool { | ||
| // todo: the fn depends on the driver.Conn, but it doesn't support | ||
| return false | ||
| } | ||
|
|
||
| func (c *MysqlXAConn) XAPrepare(xid string) error { | ||
| var sb strings.Builder | ||
| sb.WriteString("XA PREPARE ") | ||
| sb.WriteString(xid) | ||
|
|
||
| conn, _ := c.Conn.(driver.ExecerContext) | ||
| _, err := conn.ExecContext(context.TODO(), sb.String(), nil) | ||
| return err | ||
| } | ||
|
|
||
| // Recover Obtains a list of prepared transaction branches from a resource manager. | ||
| // The transaction manager calls this method during recovery to obtain the list of transaction branches | ||
| // that are currently in prepared or heuristically completed states. | ||
| func (c *MysqlXAConn) Recover(flag int) (xids []string, err error) { | ||
| startRscan := (flag & TMSTARTRSCAN) > 0 | ||
| endRscan := (flag & TMENDRSCAN) > 0 | ||
|
|
||
| if !startRscan && !endRscan && flag != TMNOFLAGS { | ||
| return nil, errors.New("invalid arguments") | ||
| } | ||
|
|
||
| if !startRscan { | ||
| return nil, nil | ||
| } | ||
|
|
||
| conn := c.Conn.(driver.QueryerContext) | ||
| res, err := conn.QueryContext(context.TODO(), "XA RECOVER", nil) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| dest := make([]driver.Value, 4) | ||
| for true { | ||
| if err = res.Next(dest); err != nil { | ||
| if err == io.EOF { | ||
| return xids, nil | ||
| } | ||
| return nil, err | ||
| } | ||
| gtridAndbqual, ok := dest[3].(string) | ||
| if !ok { | ||
| return nil, errors.New("the protocol of XA RECOVER statement is error") | ||
| } | ||
| fmt.Printf("gtr: %v", gtridAndbqual) | ||
|
|
||
| xids = append(xids, string(gtridAndbqual)) | ||
| } | ||
| return xids, err | ||
| } | ||
|
|
||
| func (c *MysqlXAConn) Rollback(xid string) error { | ||
| var sb strings.Builder | ||
| sb.WriteString("XA ROLLBACK ") | ||
| sb.WriteString(xid) | ||
|
|
||
| conn, _ := c.Conn.(driver.ExecerContext) | ||
| _, err := conn.ExecContext(context.TODO(), sb.String(), nil) | ||
| return err | ||
| } | ||
|
|
||
| func (c *MysqlXAConn) SetTransactionTimeout(duration time.Duration) bool { | ||
| return false | ||
| } | ||
|
|
||
| func (c *MysqlXAConn) Start(xid string, flags int) error { | ||
| var sb strings.Builder | ||
| sb.WriteString("XA START") | ||
| sb.WriteString(xid) | ||
|
|
||
| switch flags { | ||
| case TMJOIN: | ||
| sb.WriteString(" JOIN") | ||
| break | ||
| case TMRESUME: | ||
| sb.WriteString(" RESUME") | ||
| break | ||
| case TMNOFLAGS: | ||
| break | ||
| default: | ||
| return errors.New("invalid arguments") | ||
| } | ||
|
|
||
| conn, _ := c.Conn.(driver.ExecerContext) | ||
| _, err := conn.ExecContext(context.TODO(), sb.String(), nil) | ||
| return err | ||
| } |
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