39 lines
872 B
Go
39 lines
872 B
Go
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package prometheus
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import (
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"errors"
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"fmt"
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"strings"
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)
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type Metric struct {
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Name string
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Value interface{}
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Labels map[string]interface{}
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}
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func (m *Metric) String() (string, error) {
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if m.Value == nil {
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return "", errors.New("no value of metric found")
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}
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output := m.Name
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if len(m.Labels) > 0 {
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output += "{"
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for label, v := range m.Labels {
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switch value := v.(type) {
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case string:
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output = fmt.Sprintf("%s%s=\"%s\",", output, label, strings.ReplaceAll(value, "\"", "'"))
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case float32:
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output = fmt.Sprintf("%s%s=\"%.4f\",", output, label, value)
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case float64:
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output = fmt.Sprintf("%s%s=\"%.4f\",", output, label, value)
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default:
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output = fmt.Sprintf("%s%s=\"%v\",", output, label, value)
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}
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}
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lastChar := len(output) - 1
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output = output[:lastChar] + "}"
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}
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return fmt.Sprintf("%s %v", output, m.Value), nil
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}
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