Golang Statter.Timing方法代码示例

func (r *requestContext) recordStats(statter statsd.Statter) {
	prefix := strings.Join([]string{
		r.Method,
		strings.Replace(r.Endpoint, ".", "_", -1),
		strconv.Itoa(r.Status),
	}, ".")
	for stat, duration := range r.Timers {
		statter.Timing(prefix+"."+stat, duration.Nanoseconds(), 0.1)
	}
	if r.BadClient {
		// We expect these to be infrequent. We may want to decreate this
		// if it turns out not to be the case
		statter.Inc("bad_client", 1, 1.0)
	}
}

func test(target string, s statsd.Statter, debug bool) {
	tuple := strings.Split(target, ":")
	host := tuple[0]
	port := tuple[1]
	subhost := strings.Replace(host, ".", "_", -1)
	pre := time.Now()
	conn, err := net.Dial("tcp", target)
	if err != nil {
		if debug {
			fmt.Println("connect error:", subhost, port)
		}
		s.Inc(fmt.Sprintf("%s.%s.dial_failed", subhost, port), 1, 1)
		return
	}
	conn.Close()
	duration := time.Since(pre)
	ms := int64(duration / time.Millisecond)
	if debug {
		fmt.Printf("%s.%s.duration %d\n", subhost, port, ms)
	}
	s.Timing(fmt.Sprintf("%s.%s", subhost, port), ms, 1)
}

// ProfileCmd runs forever, sending Go runtime statistics to StatsD.
func ProfileCmd(stats statsd.Statter) {
	c := time.Tick(1 * time.Second)
	for range c {
		var memoryStats runtime.MemStats
		runtime.ReadMemStats(&memoryStats)

		stats.Gauge("Gostats.Goroutines", int64(runtime.NumGoroutine()), 1.0)

		stats.Gauge("Gostats.Heap.Alloc", int64(memoryStats.HeapAlloc), 1.0)
		stats.Gauge("Gostats.Heap.Objects", int64(memoryStats.HeapObjects), 1.0)
		stats.Gauge("Gostats.Heap.Idle", int64(memoryStats.HeapIdle), 1.0)
		stats.Gauge("Gostats.Heap.InUse", int64(memoryStats.HeapInuse), 1.0)
		stats.Gauge("Gostats.Heap.Released", int64(memoryStats.HeapReleased), 1.0)

		// Calculate average and last and convert from nanoseconds to milliseconds
		gcPauseAvg := (int64(memoryStats.PauseTotalNs) / int64(len(memoryStats.PauseNs))) / 1000000
		lastGC := int64(memoryStats.PauseNs[(memoryStats.NumGC+255)%256]) / 1000000
		stats.Timing("Gostats.Gc.PauseAvg", gcPauseAvg, 1.0)
		stats.Gauge("Gostats.Gc.LastPauseTook", lastGC, 1.0)
		stats.Gauge("Gostats.Gc.NextAt", int64(memoryStats.NextGC), 1.0)
	}
}

func main() {

	// command line flags
	var opts struct {
		HostPort  string        `long:"host" default:"127.0.0.1:8125" description:"host:port of statsd server"`
		Prefix    string        `long:"prefix" default:"test-client" description:"Statsd prefix"`
		StatType  string        `long:"type" default:"count" description:"stat type to send. Can be timing, count, guage"`
		StatValue int64         `long:"value" default:"1" description:"Value to send"`
		Name      string        `short:"n" long:"name" default:"counter" description:"stat name"`
		Rate      float32       `short:"r" long:"rate" default:"1.0" description:"sample rate"`
		Volume    int           `short:"c" long:"count" default:"1000" description:"Number of stats to send. Volume."`
		Noop      bool          `long:"noop" default:"false" description:"Use noop client"`
		Duration  time.Duration `short:"d" long:"duration" default:"10s" description:"How long to spread the volume across. Each second of duration volume/seconds events will be sent."`
	}

	// parse said flags
	_, err := flags.Parse(&opts)
	if err != nil {
		if e, ok := err.(*flags.Error); ok {
			if e.Type == flags.ErrHelp {
				os.Exit(0)
			}
		}
		fmt.Printf("Error: %+v\n", err)
		os.Exit(1)
	}

	var client statsd.Statter
	if !opts.Noop {
		client, err = statsd.New(opts.HostPort, opts.Prefix)
		if err != nil {
			log.Fatal(err)
		}
		defer client.Close()
	} else {
		client, err = statsd.NewNoop(opts.HostPort, opts.Prefix)
	}

	var stat func(stat string, value int64, rate float32) error
	switch opts.StatType {
	case "count":
		stat = func(stat string, value int64, rate float32) error {
			return client.Inc(stat, value, rate)
		}
	case "gauge":
		stat = func(stat string, value int64, rate float32) error {
			return client.Gauge(stat, value, rate)
		}
	case "timing":
		stat = func(stat string, value int64, rate float32) error {
			return client.Timing(stat, value, rate)
		}
	default:
		log.Fatal("Unsupported state type")
	}

	pertick := opts.Volume / int(opts.Duration.Seconds()) / 10
	// add some extra tiem, because the first tick takes a while
	ender := time.After(opts.Duration + 100*time.Millisecond)
	c := time.Tick(time.Second / 10)
	count := 0
	for {
		select {
		case <-c:
			for x := 0; x < pertick; x++ {
				err := stat(opts.Name, opts.StatValue, opts.Rate)
				if err != nil {
					log.Printf("Got Error: %+v", err)
					break
				}
				count += 1
			}
		case <-ender:
			log.Printf("%d events called", count)
			os.Exit(0)
			return
		}
	}
}