func (self *BinaryLog) initializeLogFile() *BinLogFile {
if len(self.logFiles) == 0 {
firstName := self.logLocation + BinaryLogNamePrefix + "0" + BinaryLogFileExt
self.logFiles = append(self.logFiles, &BinLogFile{firstName, 0})
}
lastLogFile := self.logFiles[len(self.logFiles)-1]
err := createFileIfNotExists(lastLogFile.FilePath)
if err != nil {
log.Fatal("Failed to open a log file: %s", err.Error())
}
return lastLogFile
}
func NewBinaryLog(cfg conf.Config) *BinaryLog {
binlog := &BinaryLog{
dataChan: make(chan []byte, cfg.BinaryLogBufferSize),
serviceChan: make(chan []byte, cfg.BinaryLogBufferSize),
seqId: 0,
maxPageSize: cfg.BinaryLogPageSize,
pageSize: 0,
logWriter: nil,
}
logFiles, err := findLogFiles(cfg.BinaryLogPath)
if err != nil {
log.Fatal("Coould not init bin log subsystems: %s", err.Error())
}
binlog.logFiles = logFiles
return binlog
}
// createFileIfNotExists initialized log file.
func createFileIfNotExists(path string) error {
_, err := os.Lstat(path)
if err != nil {
// What??? It is false if file doesn't exist.
if os.IsExist(err) {
log.Fatal("Can not read file stats: %s", err.Error())
}
f, err := os.Create(path)
if err != nil {
return err
}
if err := f.Close(); err != nil {
return err
}
return createFileIfNotExists(path)
}
return nil
}