mirror of
https://github.com/golang/go
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48 lines
1.1 KiB
Go
48 lines
1.1 KiB
Go
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// Copyright 2019 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Package stats provides support for recording telemetry statistics.
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package stats
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import "context"
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type Measure interface {
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Name() string
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Description() string
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Unit() string
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}
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type Float64Measure interface {
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Measure
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M(v float64) Measurement
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}
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type Int64Measure interface {
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Measure
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M(v int64) Measurement
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}
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type Measurement interface {
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Measure() Measure
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Value() float64
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}
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type nullMeasure struct{}
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type nullFloat64Measure struct{ nullMeasure }
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type nullInt64Measure struct{ nullMeasure }
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func (nullMeasure) Name() string { return "" }
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func (nullMeasure) Description() string { return "" }
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func (nullMeasure) Unit() string { return "" }
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func (nullFloat64Measure) M(v float64) Measurement { return nil }
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func (nullInt64Measure) M(v int64) Measurement { return nil }
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func NullFloat64Measure() Float64Measure { return nullFloat64Measure{} }
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func NullInt64Measure() Int64Measure { return nullInt64Measure{} }
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var (
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Record = func(ctx context.Context, ms ...Measurement) {}
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)
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