forked from mirror/ledisdb
88 lines
1.6 KiB
Go
88 lines
1.6 KiB
Go
package server
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import (
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"encoding/json"
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"github.com/siddontang/go-log/log"
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"io/ioutil"
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"os"
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"path"
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)
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type masterInfo struct {
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Addr string `json:"addr"`
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LogFile string `json:"log_name"`
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LogPos int64 `json:"log_pos"`
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}
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func (app *App) getMasterInfoName() string {
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return path.Join(app.cfg.DataDir, "master.info")
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}
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func (app *App) loadMasterInfo() error {
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data, err := ioutil.ReadFile(app.getMasterInfoName())
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if err != nil {
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if os.IsNotExist(err) {
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return nil
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} else {
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return err
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}
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}
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if err = json.Unmarshal(data, &app.master); err != nil {
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return err
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}
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return nil
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}
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func (app *App) saveMasterInfo() error {
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bakName := path.Join(app.cfg.DataDir, "master.info.bak")
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data, err := json.Marshal(&app.master)
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if err != nil {
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return err
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}
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var fd *os.File
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fd, err = os.OpenFile(bakName, os.O_CREATE|os.O_WRONLY, os.ModePerm)
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if err != nil {
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return err
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}
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if _, err = fd.Write(data); err != nil {
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fd.Close()
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return err
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}
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fd.Close()
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return os.Rename(bakName, app.getMasterInfoName())
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}
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func (app *App) slaveof(masterAddr string) error {
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if len(masterAddr) == 0 {
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//stop replication
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} else {
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}
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return nil
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}
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func (app *App) runReplication() {
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}
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func (app *App) startReplication(masterAddr string) error {
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if err := app.loadMasterInfo(); err != nil {
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log.Error("load master.info error %s, use fullsync", err.Error())
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app.master = masterInfo{masterAddr, "", 0}
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} else if app.master.Addr != masterAddr {
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if err := app.ldb.FlushAll(); err != nil {
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log.Error("replication flush old data error %s", err.Error())
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return err
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}
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app.master = masterInfo{masterAddr, "", 0}
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}
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return nil
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}
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