micro/meter/noop.go

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package meter
import (
"io"
"time"
)
// NoopMeter is an noop implementation of Meter
type noopMeter struct {
opts Options
labels Labels
}
// NewMeter returns a configured noop reporter:
func NewMeter(opts ...Option) Meter {
return &noopMeter{opts: NewOptions(opts...)}
}
func (r *noopMeter) Name() string {
return r.opts.Name
}
// Init initialize options
func (r *noopMeter) Init(opts ...Option) error {
for _, o := range opts {
o(&r.opts)
}
return nil
}
// Counter implements the Meter interface
func (r *noopMeter) Counter(name string, opts ...Option) Counter {
options := Options{}
for _, o := range opts {
o(&options)
}
return &noopCounter{labels: options.Labels}
}
// FloatCounter implements the Meter interface
func (r *noopMeter) FloatCounter(name string, opts ...Option) FloatCounter {
return &noopFloatCounter{}
}
// Gauge implements the Meter interface
func (r *noopMeter) Gauge(name string, f func() float64, opts ...Option) Gauge {
return &noopGauge{}
}
// Summary implements the Meter interface
func (r *noopMeter) Summary(name string, opts ...Option) Summary {
return &noopSummary{}
}
// SummaryExt implements the Meter interface
func (r *noopMeter) SummaryExt(name string, window time.Duration, quantiles []float64, opts ...Option) Summary {
return &noopSummary{}
}
// Histogram implements the Meter interface
func (r *noopMeter) Histogram(name string, opts ...Option) Histogram {
return &noopHistogram{}
}
// Set implements the Meter interface
func (r *noopMeter) Set(opts ...Option) Meter {
m := &noopMeter{opts: r.opts}
for _, o := range opts {
o(&m.opts)
}
return m
}
func (r *noopMeter) Write(w io.Writer, withProcessMetrics bool) error {
return nil
}
// Options implements the Meter interface
func (r *noopMeter) Options() Options {
return r.opts
}
// String implements the Meter interface
func (r *noopMeter) String() string {
return "noop"
}
type noopCounter struct {
labels Labels
}
func (r *noopCounter) Add(int) {
}
func (r *noopCounter) Dec() {
}
func (r *noopCounter) Get() uint64 {
return 0
}
func (r *noopCounter) Inc() {
}
func (r *noopCounter) Set(uint64) {
}
type noopFloatCounter struct{}
func (r *noopFloatCounter) Add(float64) {
}
func (r *noopFloatCounter) Get() float64 {
return 0
}
func (r *noopFloatCounter) Set(float64) {
}
func (r *noopFloatCounter) Sub(float64) {
}
type noopGauge struct{}
func (r *noopGauge) Get() float64 {
return 0
}
type noopSummary struct{}
func (r *noopSummary) Update(float64) {
}
func (r *noopSummary) UpdateDuration(time.Time) {
}
type noopHistogram struct{}
func (r *noopHistogram) Reset() {
}
func (r *noopHistogram) Update(float64) {
}
func (r *noopHistogram) UpdateDuration(time.Time) {
}
//func (r *noopHistogram) VisitNonZeroBuckets(f func(vmrange string, count uint64)) {}