package meter import ( "io" "time" "go.unistack.org/micro/v4/options" ) // NoopMeter is an noop implementation of Meter type noopMeter struct { opts Options } // NewMeter returns a configured noop reporter: func NewMeter(opts ...options.Option) Meter { return &noopMeter{opts: NewOptions(opts...)} } // Clone return old meter with new options func (r *noopMeter) Clone(opts ...options.Option) Meter { options := r.opts for _, o := range opts { o(&options) } return &noopMeter{opts: options} } func (r *noopMeter) Name() string { return r.opts.Name } // Init initialize options func (r *noopMeter) Init(opts ...options.Option) error { for _, o := range opts { o(&r.opts) } return nil } // Counter implements the Meter interface func (r *noopMeter) Counter(name string, labels ...string) Counter { return &noopCounter{labels: labels} } // FloatCounter implements the Meter interface func (r *noopMeter) FloatCounter(name string, labels ...string) FloatCounter { return &noopFloatCounter{labels: labels} } // Gauge implements the Meter interface func (r *noopMeter) Gauge(name string, f func() float64, labels ...string) Gauge { return &noopGauge{labels: labels} } // Summary implements the Meter interface func (r *noopMeter) Summary(name string, labels ...string) Summary { return &noopSummary{labels: labels} } // SummaryExt implements the Meter interface func (r *noopMeter) SummaryExt(name string, window time.Duration, quantiles []float64, labels ...string) Summary { return &noopSummary{labels: labels} } // Histogram implements the Meter interface func (r *noopMeter) Histogram(name string, labels ...string) Histogram { return &noopHistogram{labels: labels} } // Set implements the Meter interface func (r *noopMeter) Set(opts ...options.Option) Meter { m := &noopMeter{opts: r.opts} for _, o := range opts { o(&m.opts) } return m } func (r *noopMeter) Write(_ io.Writer, _ ...options.Option) 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 []string } 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 { labels []string } 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 { labels []string } func (r *noopGauge) Get() float64 { return 0 } type noopSummary struct { labels []string } func (r *noopSummary) Update(float64) { } func (r *noopSummary) UpdateDuration(time.Time) { } type noopHistogram struct { labels []string } 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)) {}