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helper.go
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/
helper.go
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// Copyright 2019 PingCAP, Inc.
//
// 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,
// See the License for the specific language governing permissions and
// limitations under the License.
package event
import (
gmysql "github.com/go-mysql-org/go-mysql/mysql"
"github.com/go-mysql-org/go-mysql/replication"
"github.com/pingcap/tiflow/dm/pkg/gtid"
"github.com/pingcap/tiflow/dm/pkg/terror"
)
// GTIDsFromPreviousGTIDsEvent get GTID set from a PreviousGTIDsEvent.
func GTIDsFromPreviousGTIDsEvent(e *replication.BinlogEvent) (gmysql.GTIDSet, error) {
var gSetStr string
switch ev := e.Event.(type) {
case *replication.PreviousGTIDsEvent:
gSetStr = ev.GTIDSets
default:
return nil, terror.ErrBinlogPrevGTIDEvNotValid.Generate(e.Event)
}
return gtid.ParserGTID(gmysql.MySQLFlavor, gSetStr)
}
// GTIDsFromMariaDBGTIDListEvent get GTID set from a MariaDBGTIDListEvent.
func GTIDsFromMariaDBGTIDListEvent(e *replication.BinlogEvent) (gmysql.GTIDSet, error) {
var gtidListEv *replication.MariadbGTIDListEvent
switch ev := e.Event.(type) {
case *replication.MariadbGTIDListEvent:
gtidListEv = ev
default:
return nil, terror.ErrBinlogNeedMariaDBGTIDSet.Generate(e.Event)
}
ggSet, err := gmysql.ParseMariadbGTIDSet("")
if err != nil {
return nil, terror.ErrBinlogParseMariaDBGTIDSet.Delegate(err)
}
mGSet := ggSet.(*gmysql.MariadbGTIDSet)
for _, mGTID := range gtidListEv.GTIDs {
mgClone := mGTID // use another variable so we can get different pointer (&mgClone below) when iterating
err = mGSet.AddSet(&mgClone)
if err != nil {
return nil, terror.ErrBinlogMariaDBAddGTIDSet.Delegate(err, mGTID)
}
}
return ggSet, nil
}