func NewSlave(reqChan *RequestChan, bin *binlog.BinLog,
mc *config.MasterConfig, adminPwd string) *slave {
var slv = new(slave)
slv.reqChan = reqChan
slv.bin = bin
slv.mc = mc
slv.mi = mc.GetMaster()
slv.adminPwd = adminPwd
return slv
}
func clearSlaveOldData(conf *config.Config, mc *config.MasterConfig) error {
var err error
m := mc.GetMaster()
// Normal slave
if len(m.MasterAddr) > 0 && !m.Migration {
// Check whether need to clear old data
if m.Status != ctrl.SlaveNeedClear && m.Status != ctrl.SlaveClear {
return nil
}
err = mc.SetStatus(ctrl.SlaveClear)
if err != nil {
return err
}
// Move binlog & table to backup in case you need the old data
var backupDir = BackupDirName(conf)
err = os.RemoveAll(backupDir)
if err != nil {
return err
}
err = os.MkdirAll(backupDir, os.ModeDir|os.ModePerm)
if err != nil {
return err
}
var binlogDir = BinLogDirName(conf)
log.Println("Move directory binlog to backup")
err = os.Rename(binlogDir, backupDir+"/binlog")
if err != nil {
return err
}
var tableDir = TableDirName(conf)
log.Println("Move directory table to backup")
err = os.Rename(tableDir, backupDir+"/table")
if err != nil {
return err
}
err = mc.SetStatus(ctrl.SlaveInit)
if err != nil {
return err
}
}
return nil
}
func NewWriteAccess(replication bool, mc *config.MasterConfig) *WriteAccess {
hasMaster, migration, slotId := mc.GetMasterSlot()
return &WriteAccess{replication, hasMaster, migration, slotId}
}