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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,95 @@ | ||
| package logutil | ||
|
|
||
| import ( | ||
| "bufio" | ||
| "fmt" | ||
| "os" | ||
| "strings" | ||
| ) | ||
|
|
||
| // RecordReplayer is used to replay sql | ||
| var RecordReplayer *recordReplayer | ||
|
|
||
| // StartReplay starts replay | ||
| func StartReplay(filename string) { | ||
| RecordReplayer = newRecordPlayer(filename) | ||
| RecordReplayer.start() | ||
| } | ||
|
|
||
| // StopReplay stops replay | ||
| func StopReplay() { | ||
| RecordReplayer.close <- struct{}{} | ||
| } | ||
|
|
||
| func newRecordPlayer(filename string) *recordReplayer { | ||
| r := &recordReplayer{ | ||
| fileName: filename, | ||
| close: make(chan struct{}), | ||
| } | ||
| return r | ||
| } | ||
|
|
||
| type recordReplayer struct { | ||
| close chan struct{} | ||
| fileName string | ||
| scanner *bufio.Scanner | ||
| } | ||
|
|
||
| func (r *recordReplayer) start() { | ||
| f, err := os.OpenFile(r.fileName, os.O_RDONLY, os.ModePerm) | ||
| defer f.Close() | ||
| if err != nil { | ||
| fmt.Printf("Open file error %s\n", err.Error()) | ||
| return | ||
| } | ||
|
|
||
| r.scanner = bufio.NewScanner(f) | ||
| txns := make(map[string][]string) | ||
| for r.scanner.Scan() { | ||
| select { | ||
| case <-r.close: | ||
| break | ||
| default: | ||
| } | ||
| text := r.scanner.Text() | ||
| s := strings.Split(text, " ") | ||
| if len(s) < 2 { | ||
| fmt.Printf("invalid sql log %v\n", s) | ||
| continue | ||
| } | ||
| inTxn := len(s) == 3 | ||
| if inTxn { | ||
| txnID := s[0] | ||
| sql := s[2] | ||
| txn := txns[txnID] | ||
| txn = append(txn, sql) | ||
| if sql == strings.ToLower("commit") { | ||
| tr := &txnReplayer{ | ||
| close: make(chan struct{}), | ||
| sqls: txn, | ||
| } | ||
| go tr.replay() | ||
| } else { | ||
| // todo | ||
| // replay single sql | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| type txnReplayer struct { | ||
| close chan struct{} | ||
| sqls []string | ||
| } | ||
|
|
||
| func (tr *txnReplayer) replay() { | ||
| for _, sql := range tr.sqls { | ||
| select { | ||
| case <-tr.close: | ||
| break | ||
| default: | ||
| // todo | ||
| // replay single sql | ||
| } | ||
| } | ||
| } |