49 lines
1.1 KiB
Go
49 lines
1.1 KiB
Go
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package metrics
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import "encoding/json"
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// Label hold an map[string]interface{} value that can be set arbitrarily.
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type Label interface {
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Value() map[string]interface{}
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String() string
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Mark(map[string]interface{})
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}
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// NewRegisteredLabel constructs and registers a new StandardLabel.
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func NewRegisteredLabel(name string, r Registry) Label {
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c := NewStandardLabel()
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if nil == r {
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r = DefaultRegistry
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}
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r.Register(name, c)
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return c
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}
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// NewStandardLabel constructs a new StandardLabel.
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func NewStandardLabel() *StandardLabel {
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return &StandardLabel{}
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}
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// StandardLabel is the standard implementation of a Label.
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type StandardLabel struct {
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value map[string]interface{}
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jsonStr string
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}
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// Value returns label values.
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func (l *StandardLabel) Value() map[string]interface{} {
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return l.value
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}
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// Mark records the label.
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func (l *StandardLabel) Mark(value map[string]interface{}) {
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buf, _ := json.Marshal(value)
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l.jsonStr = string(buf)
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l.value = value
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}
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// String returns label by JSON format.
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func (l *StandardLabel) String() string {
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return l.jsonStr
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}
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