func gatherInfoOutput()

in plugins/inputs/redis/redis.go [155:250]

• 79 lines of code
• 22 McCabe index (conditional complexity)

func gatherInfoOutput(
	rdr *bufio.Reader,
	acc telegraf.Accumulator,
	tags map[string]string,
) error {
	var section string
	var keyspace_hits, keyspace_misses int64

	scanner := bufio.NewScanner(rdr)
	fields := make(map[string]interface{})
	for scanner.Scan() {
		line := scanner.Text()
		if strings.Contains(line, "ERR") {
			break
		}

		if len(line) == 0 {
			continue
		}
		if line[0] == '#' {
			if len(line) > 2 {
				section = line[2:]
			}
			continue
		}

		parts := strings.SplitN(line, ":", 2)
		if len(parts) < 2 {
			continue
		}
		name := string(parts[0])

		if section == "Server" {
			if name != "lru_clock" && name != "uptime_in_seconds" {
				continue
			}
		}

		if name == "mem_allocator" {
			continue
		}

		if strings.HasSuffix(name, "_human") {
			continue
		}

		metric, ok := Tracking[name]
		if !ok {
			if section == "Keyspace" {
				kline := strings.TrimSpace(string(parts[1]))
				gatherKeyspaceLine(name, kline, acc, tags)
				continue
			}
			metric = name
		}

		val := strings.TrimSpace(parts[1])

		// Try parsing as int
		if ival, err := strconv.ParseInt(val, 10, 64); err == nil {
			switch name {
			case "keyspace_hits":
				keyspace_hits = ival
			case "keyspace_misses":
				keyspace_misses = ival
			case "rdb_last_save_time":
				// influxdb can't calculate this, so we have to do it
				fields["rdb_last_save_time_elapsed"] = time.Now().Unix() - ival
			}
			fields[metric] = ival
			continue
		}

		// Try parsing as a float
		if fval, err := strconv.ParseFloat(val, 64); err == nil {
			fields[metric] = fval
			continue
		}

		// Treat it as a string

		if name == "role" {
			tags["replication_role"] = val
			continue
		}

		fields[metric] = val
	}
	var keyspace_hitrate float64 = 0.0
	if keyspace_hits != 0 || keyspace_misses != 0 {
		keyspace_hitrate = float64(keyspace_hits) / float64(keyspace_hits+keyspace_misses)
	}
	fields["keyspace_hitrate"] = keyspace_hitrate
	acc.AddFields("redis", fields, tags)
	return nil
}