48 lines
1.6 KiB
Go
48 lines
1.6 KiB
Go
/*
|
|
Copyright 2022 Alibaba Group Holding Limited.
|
|
|
|
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 meta
|
|
|
|
import (
|
|
"fmt"
|
|
)
|
|
|
|
// BinaryLogFilesConsistentAndContinuousInName determines whether the given binlog files forms a continuous
|
|
// binlog flow by checking the prefix and index in the filenames, according to the official doc located at
|
|
// https://dev.mysql.com/doc/internals/en/binary-log-structure-and-contents.html.
|
|
//
|
|
// It also returns nil if the filename slice is nil or empty.
|
|
func BinaryLogFilesConsistentAndContinuousInName(filenames []string) ([]BinlogFile, error) {
|
|
binlogFiles, err := ParseBinlogFilesAndSortByIndex(filenames...)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// Check basename and index.
|
|
basename, lastIndex := binlogFiles[0].Basename, binlogFiles[0].Index
|
|
for i := 1; i < len(binlogFiles); i++ {
|
|
if binlogFiles[i].Basename != basename {
|
|
return nil, fmt.Errorf("binlog filenames not consistent: expect to have basename %s, but found %s", basename, binlogFiles[i].Basename)
|
|
}
|
|
if binlogFiles[i].Index != lastIndex+1 {
|
|
return nil, fmt.Errorf("binlog filenames not continuous at %d", lastIndex+1)
|
|
}
|
|
lastIndex++
|
|
}
|
|
|
|
return binlogFiles, nil
|
|
}
|