reporter = NewMyStatsReporter()  // Implement as you will
tags := map[string]string{
	"dc": "east-1",
	"type": "master",
}
reportEvery := time.Second

scope := tally.NewRootScope(tally.ScopeOptions{
	Tags: tags,
	Reporter: reporter,
}, reportEvery)

// Get a counter, increment a counter
reqCounter := scope.Counter("requests")  // cache me
reqCounter.Inc(1)

queueGauge := scope.Gauge("queue_length")  // cache me
queueGauge.Update(42)

import (
	"io"
	"github.com/cactus/go-statsd-client/statsd"
	"github.com/uber-go/tally"
	tallystatsd "github.com/uber-go/tally/statsd"
	// ...
)

func newScope() (tally.Scope, io.Closer) {
	statter, _ := statsd.NewBufferedClient("127.0.0.1:8125",
		"stats", 100*time.Millisecond, 1440)

	reporter := tallystatsd.NewReporter(statter, tallystatsd.Options{
		SampleRate: 1.0,
	})

	scope, closer := tally.NewRootScope(tally.ScopeOptions{
		Prefix:   "my-service",
		Tags:     map[string]string{},
		Reporter: reporter,
	}, time.Second)

	return scope, closer
}

// BaseStatsReporter implements the shared reporter methods.
type BaseStatsReporter interface {
	Capabilities() Capabilities
	Flush()
}

// StatsReporter is a backend for Scopes to report metrics to.
type StatsReporter interface {
	BaseStatsReporter

	// ReportCounter reports a counter value
	ReportCounter(
		name string,
		tags map[string]string,
		value int64,
	)

	// ReportGauge reports a gauge value
	ReportGauge(
		name string,
		tags map[string]string,
		value float64,
	)

	// ReportTimer reports a timer value
	ReportTimer(
		name string,
		tags map[string]string,
		interval time.Duration,
	)

	// ReportHistogramValueSamples reports histogram samples for a bucket
	ReportHistogramValueSamples(
		name string,
		tags map[string]string,
		buckets Buckets,
		bucketLowerBound,
		bucketUpperBound float64,
		samples int64,
	)

	// ReportHistogramDurationSamples reports histogram samples for a bucket
	ReportHistogramDurationSamples(
		name string,
		tags map[string]string,
		buckets Buckets,
		bucketLowerBound,
		bucketUpperBound time.Duration,
		samples int64,
	)
}

type Scope interface {
	// Counter returns the Counter object corresponding to the name.
	Counter(name string) Counter

	// Gauge returns the Gauge object corresponding to the name.
	Gauge(name string) Gauge

	// Timer returns the Timer object corresponding to the name.
	Timer(name string) Timer

	// Histogram returns the Histogram object corresponding to the name.
	// To use default value and duration buckets configured for the scope
	// simply pass tally.DefaultBuckets or nil.
	// You can use tally.ValueBuckets{x, y, ...} for value buckets.
	// You can use tally.DurationBuckets{x, y, ...} for duration buckets.
	// You can use tally.MustMakeLinearValueBuckets(start, width, count) for linear values.
	// You can use tally.MustMakeLinearDurationBuckets(start, width, count) for linear durations.
	// You can use tally.MustMakeExponentialValueBuckets(start, factor, count) for exponential values.
	// You can use tally.MustMakeExponentialDurationBuckets(start, factor, count) for exponential durations.
	Histogram(name string, buckets Buckets) Histogram

	// Tagged returns a new child scope with the given tags and current tags.
	Tagged(tags map[string]string) Scope

	// SubScope returns a new child scope appending a further name prefix.
	SubScope(name string) Scope

	// Capabilities returns a description of metrics reporting capabilities.
	Capabilities() Capabilities
}

// Capabilities is a description of metrics reporting capabilities.
type Capabilities interface {
	// Reporting returns whether the reporter has the ability to actively report.
	Reporting() bool

	// Tagging returns whether the reporter has the capability for tagged metrics.
	Tagging() bool
}