Golang logging.Error函數代碼示例

func cmdProxy(argv []string) (err error) {
	usage := `usage:
	cconfig proxy list
	cconfig proxy offline <proxy_name>
	cconfig proxy online <proxy_name>
`
	args, err := docopt.Parse(usage, argv, true, "", false)
	if err != nil {
		log.Error(err)
		return err
	}
	log.Debug(args)

	zkLock.Lock(fmt.Sprintf("proxy, %+v", argv))
	defer func() {
		err := zkLock.Unlock()
		if err != nil {
			log.Error(err)
		}
	}()

	if args["list"].(bool) {
		log.Warning(err)
		return runProxyList()
	}

	proxyName := args["<proxy_name>"].(string)
	if args["online"].(bool) {
		return runSetProxyStatus(proxyName, models.PROXY_STATE_ONLINE)
	}
	if args["offline"].(bool) {
		return runSetProxyStatus(proxyName, models.PROXY_STATE_MARK_OFFLINE)
	}
	return nil
}

func (s *MemcacheStats) updateItemsStats() {
	if s.items == nil {
		return
	}
	s.readStats("items", func(sKey, sValue string) {
		ival, err := strconv.ParseInt(sValue, 10, 64)
		if err != nil {
			log.Error(err)
			internalErrors.Add("MemcacheStats", 1)
			return
		}
		subkey, slabid, err := parseItemKey(sKey)
		if err != nil {
			log.Error(err)
			internalErrors.Add("MemcacheStats", 1)
			return
		}
		m, ok := s.items[subkey]
		if !ok {
			log.Errorf("Unknown memcache items stats %v %v: %v", subkey, slabid, ival)
			internalErrors.Add("MemcacheStats", 1)
			return
		}
		m[slabid] = ival
	})
}

func (cp *ConnPool) postConnect(conn net.Conn, err error) (net.Conn, error) {
	if err != nil || !cp.sendReadOnly {
		return conn, err
	}
	defer func() {
		if err != nil {
			conn.Close()
			conn = nil
		}
	}()

	if _, err = conn.Write(REDIS_CMD_READ_ONLY); err != nil {
		log.Error("write READONLY failed", conn.RemoteAddr().String(), err)
		return conn, err
	}

	var data *resp.Data
	reader := bufio.NewReader(conn)
	data, err = resp.ReadData(reader)
	if err != nil {
		log.Error("read READONLY resp failed", conn.RemoteAddr().String(), err)
		return conn, err
	}

	if data.T == resp.T_Error {
		log.Error("READONLY resp is not OK", conn.RemoteAddr().String())
		err = errors.New("post connect error: READONLY resp is not OK")
	}
	return conn, err
}

func cmdServer(argv []string) (err error) {
	usage := `usage:
	cconfig server list
	cconfig server add <group_id> <redis_addr> <role>
	cconfig server remove <group_id> <redis_addr>
	cconfig server promote <group_id> <redis_addr>
	cconfig server add-group <group_id>
	cconfig server remove-group <group_id>
`
	args, err := docopt.Parse(usage, argv, true, "", false)
	if err != nil {
		log.Error(err)
		return err
	}
	log.Debug(args)

	zkLock.Lock(fmt.Sprintf("server, %+v", argv))
	defer func() {
		err := zkLock.Unlock()
		if err != nil {
			log.Error(err)
		}
	}()

	if args["list"].(bool) {
		return runListServerGroup()
	}

	groupId, err := strconv.Atoi(args["<group_id>"].(string))
	if err != nil {
		log.Warning(err)
		return err
	}

	if args["remove-group"].(bool) {
		return runRemoveServerGroup(groupId)
	}
	if args["add-group"].(bool) {
		return runAddServerGroup(groupId)
	}

	serverAddr := args["<redis_addr>"].(string)
	if args["add"].(bool) {
		role := args["<role>"].(string)
		return runAddServerToGroup(groupId, serverAddr, role)
	}
	if args["remove"].(bool) {
		return runRemoveServerFromGroup(groupId, serverAddr)
	}
	if args["promote"].(bool) {
		return runPromoteServerToMaster(groupId, serverAddr)
	}

	return nil
}

func (self *SQLite3Storage) Init() error {
	var err error
	self.db, err = sql.Open("sqlite3", self.Source)
	if err != nil {
		log.Error(err)
		return err
	}

	_, create_err := self.db.Exec(createTableSQL)
	if create_err != nil {
		log.Error(create_err)
		return create_err
	}

	return self.db.Ping()
}

func (s *Server) resetSchemaInfo() error {
	for _, c := range s.clients {
		if len(c.txConns) > 0 {
			return errors.Errorf("transaction exist")
		}
	}

	cfg, err := config.ParseConfigFile(s.configFile)
	if err != nil {
		log.Error(err)
		return err
	}

	s.cleanup()
	s.autoSchamas = make(map[string]*tabletserver.SchemaInfo)
	for _, n := range s.shards {
		n.Close()
	}

	s.shards = nil
	s.schemas = nil

	log.Warningf("%#v", cfg)

	log.SetLevelByString(cfg.LogLevel)

	s.cfg = cfg
	return s.loadSchemaInfo()
}

func main() {
	fmt.Print(banner)
	log.SetLevelByString("info")

	args, err := docopt.Parse(usage, nil, true, "codis proxy v0.1", true)
	if err != nil {
		log.Error(err)
	}

	// set config file
	if args["-c"] != nil {
		configFile = args["-c"].(string)
	}

	// set output log file
	if args["-L"] != nil {
		log.SetOutputByName(args["-L"].(string))
	}

	// set log level
	if args["--log-level"] != nil {
		log.SetLevelByString(args["--log-level"].(string))
	}

	// set cpu
	if args["--cpu"] != nil {
		cpus, err = strconv.Atoi(args["--cpu"].(string))
		if err != nil {
			log.Fatal(err)
		}
	}

	// set addr
	if args["--addr"] != nil {
		addr = args["--addr"].(string)
	}

	// set http addr
	if args["--http-addr"] != nil {
		httpAddr = args["--http-addr"].(string)
	}

	wd, _ := os.Getwd()
	log.Info("wd:", wd)
	log.CrashLog(wd + ".dump")

	router.CheckUlimit(1024)
	runtime.GOMAXPROCS(cpus)

	http.HandleFunc("/setloglevel", handleSetLogLevel)
	go http.ListenAndServe(httpAddr, nil)
	log.Info("running on ", addr)
	conf, err := router.LoadConf(configFile)
	if err != nil {
		log.Fatal(err)
	}
	s := router.NewServer(addr, httpAddr, conf)
	s.Run()
	log.Warning("exit")
}

func cmdProxy(argv []string) (err error) {
	usage := `usage:
	codis-config proxy list
	codis-config proxy offline <proxy_name>
	codis-config proxy online <proxy_name>
`
	args, err := docopt.Parse(usage, argv, true, "", false)
	if err != nil {
		log.Error(err)
		return err
	}
	log.Debug(args)

	if args["list"].(bool) {
		return runProxyList()
	}

	proxyName := args["<proxy_name>"].(string)
	if args["online"].(bool) {
		return runSetProxyStatus(proxyName, models.PROXY_STATE_ONLINE)
	}
	if args["offline"].(bool) {
		return runSetProxyStatus(proxyName, models.PROXY_STATE_MARK_OFFLINE)
	}
	return nil
}

func cmdDashboard(argv []string) (err error) {
	usage := `usage: codis-config dashboard [--addr=<address>] [--http-log=<log_file>]

options:
	--addr	listen ip:port, e.g. localhost:12345, :8086, [default: :8086]
	--http-log	http request log [default: request.log ]
`

	args, err := docopt.Parse(usage, argv, true, "", false)
	if err != nil {
		log.Error(err)
		return err
	}
	log.Debug(args)

	logFileName := "request.log"
	if args["--http-log"] != nil {
		logFileName = args["--http-log"].(string)
	}

	addr := ":8086"
	if args["--addr"] != nil {
		addr = args["--addr"].(string)
	}

	runDashboard(addr, logFileName)
	return nil
}

func (self *ResMan) addReadyTask(id string) (string, error) {
	if self.ready.Exist(id) {
		return "", fmt.Errorf("%s already exist: %+v", id, self.ready.Get(id))
	}

	job, err := scheduler.GetJobById(id)
	if err != nil {
		return "", err
	}

	persistentTask := &scheduler.Task{TaskId: self.genTaskId(), Status: scheduler.STATUS_READY,
		StartTs: time.Now().Unix(), JobName: job.Name}
	log.Warningf("%+v", persistentTask)
	err = persistentTask.Save()
	if err != nil {
		log.Error(err)
		return "", err
	}

	job.LastTaskId = persistentTask.TaskId
	job.Save()

	t := &Task{Tid: persistentTask.TaskId, job: job, state: taskReady}
	self.ready.Add(t.Tid, t)
	log.Debugf("ready task %+v, total count:%d", t, self.ready.Length())

	return persistentTask.TaskId, nil
}

func (self *RedisQ) GetJobs() ([]*Job, error) {
	strs, err := self.client.Keys(JobPrefix + "*").Result()
	if err != nil {
		return nil, err
	}

	if len(strs) == 0 { //no jobs on redis
		return nil, nil
	}

	vals, err := self.client.MGet(strs...).Result()
	if err != nil {
		return nil, err
	}

	jobs := make([]*Job, len(strs), len(strs))
	for i, s := range vals {
		err := json.Unmarshal([]byte(s.(string)), &jobs[i])
		if err != nil {
			log.Error(s)
			return nil, err
		}
	}

	return jobs, nil
}

func WaitForReceiverWithTimeout(zkConn zkhelper.Conn, productName string, actionZkPath string, proxies []ProxyInfo, timeoutInMs int) error {
	if len(proxies) == 0 {
		return nil
	}

	times := 0
	proxyIds := make(map[string]struct{})
	var offlineProxyIds []string
	for _, p := range proxies {
		proxyIds[p.Id] = struct{}{}
	}

	checkTimes := timeoutInMs / 500
	// check every 500ms
	for times < checkTimes {
		if times >= 6 && (times*500)%1000 == 0 {
			log.Warning("abnormal waiting time for receivers", actionZkPath, offlineProxyIds)
		}
		// get confirm ids
		nodes, _, err := zkConn.Children(actionZkPath)
		if err != nil {
			return errors.Trace(err)
		}
		confirmIds := make(map[string]struct{})
		for _, node := range nodes {
			id := path.Base(node)
			confirmIds[id] = struct{}{}
		}
		if len(confirmIds) != 0 {
			match := true
			// check if all proxy have responsed
			var notMatchList []string
			for id, _ := range proxyIds {
				// if proxy id not in confirm ids, means someone didn't response
				if _, ok := confirmIds[id]; !ok {
					match = false
					notMatchList = append(notMatchList, id)
				}
			}
			if match {
				return nil
			}
			offlineProxyIds = notMatchList
		}
		times += 1
		time.Sleep(500 * time.Millisecond)
	}
	if len(offlineProxyIds) > 0 {
		log.Error("proxies didn't responed: ", offlineProxyIds)
	}

	// set offline proxies
	for _, id := range offlineProxyIds {
		log.Errorf("mark proxy %s to PROXY_STATE_MARK_OFFLINE", id)
		if err := SetProxyStatus(zkConn, productName, id, PROXY_STATE_MARK_OFFLINE); err != nil {
			return errors.Trace(err)
		}
	}
	return errors.Trace(ErrReceiverTimeout)
}

//todo: test select a == b && c == d
//select c ==d && a == b
func generateSelectSql(ti *tabletserver.TableInfo, plan *planbuilder.ExecPlan) (string, error) {
	if len(ti.PKColumns) != len(plan.PKValues) {
		log.Error("PKColumns and PKValues not match")
		return "", errors.Errorf("PKColumns and PKValues not match, %+v, %+v", ti.PKColumns, plan.PKValues)
	}

	pks := make([]schema.TableColumn, 0, len(ti.PKColumns))
	for i, _ := range ti.PKColumns {
		pks = append(pks, ti.Columns[ti.PKColumns[i]])
	}

	buf := &bytes.Buffer{}
	buf.WriteString(fmt.Sprintf("select * from %s where ", ti.Name))
	for i, pk := range pks {
		buf.WriteString(pk.Name)
		buf.WriteString("=")
		plan.PKValues[i].(sqltypes.Value).EncodeSql(buf)
		if i < len(pks)-1 {
			buf.WriteString(" and ")
		}
	}

	buf.WriteString(";")

	return buf.String(), nil
}

func (s *Server) responseAction(seq int64) {
	log.Info("send response", seq)
	err := s.top.DoResponse(int(seq), &s.pi)
	if err != nil {
		log.Error(errors.ErrorStack(err))
	}
}

func (self *Server) Start(addr string) {
	ln, err := net.Listen("tcp", addr)
	if err != nil {
		log.Fatal(err)
	}

	go self.EvtLoop()

	log.Debug("listening on", addr)

	go registerWebHandler(self)

	//load background jobs from storage
	err = self.store.Init()
	if err != nil {
		log.Error(err)
		self.store = nil
	} else {
		self.getAllJobs()
	}

	for {
		conn, err := ln.Accept()
		if err != nil { // handle error
			continue
		}

		session := &session{}
		go session.handleConnection(self, conn)
	}
}