Golang Metric.String方法代碼示例

func FormatMetric(k *KinesisOutput, point telegraf.Metric) (string, error) {
	if k.Format == "string" {
		return point.String(), nil
	} else {
		m := fmt.Sprintf("%+v,%+v,%+v",
			point.Name(),
			point.Tags(),
			point.String())
		return m, nil
	}
}

func (l *Librato) buildGauges(m telegraf.Metric) ([]*Gauge, error) {

	gauges := []*Gauge{}
	if m.Time().Unix() == 0 {
		return gauges, fmt.Errorf(
			"Measure time must not be zero\n <%s> \n",
			m.String())
	}
	metricSource := graphite.InsertField(
		graphite.SerializeBucketName("", m.Tags(), l.Template, ""),
		"value")
	if metricSource == "" {
		return gauges,
			fmt.Errorf("undeterminable Source type from Field, %s\n",
				l.Template)
	}
	for fieldName, value := range m.Fields() {

		metricName := m.Name()
		if fieldName != "value" {
			metricName = fmt.Sprintf("%s.%s", m.Name(), fieldName)
		}

		gauge := &Gauge{
			Source:      reUnacceptedChar.ReplaceAllString(metricSource, "-"),
			Name:        reUnacceptedChar.ReplaceAllString(metricName, "-"),
			MeasureTime: m.Time().Unix(),
		}
		if !verifyValue(value) {
			continue
		}
		if err := gauge.setValue(value); err != nil {
			return gauges, fmt.Errorf(
				"unable to extract value from Fields, %s\n",
				err.Error())
		}
		gauges = append(gauges, gauge)
	}
	if l.Debug {
		fmt.Printf("[DEBUG] Built gauges: %v\n", gauges)
	}
	return gauges, nil
}

func (s *InfluxSerializer) Serialize(metric telegraf.Metric) ([]string, error) {
	return []string{metric.String()}, nil
}

// makeMetric either returns a metric, or returns nil if the metric doesn't
// need to be created (because of filtering, an error, etc.)
func (ac *accumulator) makeMetric(
	measurement string,
	fields map[string]interface{},
	tags map[string]string,
	mType telegraf.ValueType,
	t ...time.Time,
) telegraf.Metric {
	if len(fields) == 0 || len(measurement) == 0 {
		return nil
	}
	if tags == nil {
		tags = make(map[string]string)
	}

	// Override measurement name if set
	if len(ac.inputConfig.NameOverride) != 0 {
		measurement = ac.inputConfig.NameOverride
	}
	// Apply measurement prefix and suffix if set
	if len(ac.inputConfig.MeasurementPrefix) != 0 {
		measurement = ac.inputConfig.MeasurementPrefix + measurement
	}
	if len(ac.inputConfig.MeasurementSuffix) != 0 {
		measurement = measurement + ac.inputConfig.MeasurementSuffix
	}

	// Apply plugin-wide tags if set
	for k, v := range ac.inputConfig.Tags {
		if _, ok := tags[k]; !ok {
			tags[k] = v
		}
	}
	// Apply daemon-wide tags if set
	for k, v := range ac.defaultTags {
		if _, ok := tags[k]; !ok {
			tags[k] = v
		}
	}

	// Apply the metric filter(s)
	if ok := ac.inputConfig.Filter.Apply(measurement, fields, tags); !ok {
		return nil
	}

	for k, v := range fields {
		// Validate uint64 and float64 fields
		switch val := v.(type) {
		case uint64:
			// InfluxDB does not support writing uint64
			if val < uint64(9223372036854775808) {
				fields[k] = int64(val)
			} else {
				fields[k] = int64(9223372036854775807)
			}
			continue
		case float64:
			// NaNs are invalid values in influxdb, skip measurement
			if math.IsNaN(val) || math.IsInf(val, 0) {
				if ac.debug {
					log.Printf("Measurement [%s] field [%s] has a NaN or Inf "+
						"field, skipping",
						measurement, k)
				}
				delete(fields, k)
				continue
			}
		}

		fields[k] = v
	}

	var timestamp time.Time
	if len(t) > 0 {
		timestamp = t[0]
	} else {
		timestamp = time.Now()
	}
	timestamp = timestamp.Round(ac.precision)

	var m telegraf.Metric
	var err error
	switch mType {
	case telegraf.Counter:
		m, err = telegraf.NewCounterMetric(measurement, tags, fields, timestamp)
	case telegraf.Gauge:
		m, err = telegraf.NewGaugeMetric(measurement, tags, fields, timestamp)
	default:
		m, err = telegraf.NewMetric(measurement, tags, fields, timestamp)
	}
	if err != nil {
		log.Printf("Error adding point [%s]: %s\n", measurement, err.Error())
		return nil
	}

	if ac.trace {
		fmt.Println("> " + m.String())
	}

//.........這裏部分代碼省略.........