Update dependencies

vendor/github.com/aws/smithy-go/metrics/metrics.go

@@ -0,0 +1,136 @@
+// Package metrics defines the metrics APIs used by Smithy clients.
+package metrics
+
+import (
+	"context"
+
+	"github.com/aws/smithy-go"
+)
+
+// MeterProvider is the entry point for creating a Meter.
+type MeterProvider interface {
+	Meter(scope string, opts ...MeterOption) Meter
+}
+
+// MeterOption applies configuration to a Meter.
+type MeterOption func(o *MeterOptions)
+
+// MeterOptions represents configuration for a Meter.
+type MeterOptions struct {
+	Properties smithy.Properties
+}
+
+// Meter is the entry point for creation of measurement instruments.
+type Meter interface {
+	// integer/synchronous
+	Int64Counter(name string, opts ...InstrumentOption) (Int64Counter, error)
+	Int64UpDownCounter(name string, opts ...InstrumentOption) (Int64UpDownCounter, error)
+	Int64Gauge(name string, opts ...InstrumentOption) (Int64Gauge, error)
+	Int64Histogram(name string, opts ...InstrumentOption) (Int64Histogram, error)
+
+	// integer/asynchronous
+	Int64AsyncCounter(name string, callback Int64Callback, opts ...InstrumentOption) (AsyncInstrument, error)
+	Int64AsyncUpDownCounter(name string, callback Int64Callback, opts ...InstrumentOption) (AsyncInstrument, error)
+	Int64AsyncGauge(name string, callback Int64Callback, opts ...InstrumentOption) (AsyncInstrument, error)
+
+	// floating-point/synchronous
+	Float64Counter(name string, opts ...InstrumentOption) (Float64Counter, error)
+	Float64UpDownCounter(name string, opts ...InstrumentOption) (Float64UpDownCounter, error)
+	Float64Gauge(name string, opts ...InstrumentOption) (Float64Gauge, error)
+	Float64Histogram(name string, opts ...InstrumentOption) (Float64Histogram, error)
+
+	// floating-point/asynchronous
+	Float64AsyncCounter(name string, callback Float64Callback, opts ...InstrumentOption) (AsyncInstrument, error)
+	Float64AsyncUpDownCounter(name string, callback Float64Callback, opts ...InstrumentOption) (AsyncInstrument, error)
+	Float64AsyncGauge(name string, callback Float64Callback, opts ...InstrumentOption) (AsyncInstrument, error)
+}
+
+// InstrumentOption applies configuration to an instrument.
+type InstrumentOption func(o *InstrumentOptions)
+
+// InstrumentOptions represents configuration for an instrument.
+type InstrumentOptions struct {
+	UnitLabel   string
+	Description string
+}
+
+// Int64Counter measures a monotonically increasing int64 value.
+type Int64Counter interface {
+	Add(context.Context, int64, ...RecordMetricOption)
+}
+
+// Int64UpDownCounter measures a fluctuating int64 value.
+type Int64UpDownCounter interface {
+	Add(context.Context, int64, ...RecordMetricOption)
+}
+
+// Int64Gauge samples a discrete int64 value.
+type Int64Gauge interface {
+	Sample(context.Context, int64, ...RecordMetricOption)
+}
+
+// Int64Histogram records multiple data points for an int64 value.
+type Int64Histogram interface {
+	Record(context.Context, int64, ...RecordMetricOption)
+}
+
+// Float64Counter measures a monotonically increasing float64 value.
+type Float64Counter interface {
+	Add(context.Context, float64, ...RecordMetricOption)
+}
+
+// Float64UpDownCounter measures a fluctuating float64 value.
+type Float64UpDownCounter interface {
+	Add(context.Context, float64, ...RecordMetricOption)
+}
+
+// Float64Gauge samples a discrete float64 value.
+type Float64Gauge interface {
+	Sample(context.Context, float64, ...RecordMetricOption)
+}
+
+// Float64Histogram records multiple data points for an float64 value.
+type Float64Histogram interface {
+	Record(context.Context, float64, ...RecordMetricOption)
+}
+
+// AsyncInstrument is the universal handle returned for creation of all async
+// instruments.
+//
+// Callers use the Stop() API to unregister the callback passed at instrument
+// creation.
+type AsyncInstrument interface {
+	Stop()
+}
+
+// Int64Callback describes a function invoked when an async int64 instrument is
+// read.
+type Int64Callback func(context.Context, Int64Observer)
+
+// Int64Observer is the interface passed to async int64 instruments.
+//
+// Callers use the Observe() API of this interface to report metrics to the
+// underlying collector.
+type Int64Observer interface {
+	Observe(context.Context, int64, ...RecordMetricOption)
+}
+
+// Float64Callback describes a function invoked when an async float64
+// instrument is read.
+type Float64Callback func(context.Context, Float64Observer)
+
+// Float64Observer is the interface passed to async int64 instruments.
+//
+// Callers use the Observe() API of this interface to report metrics to the
+// underlying collector.
+type Float64Observer interface {
+	Observe(context.Context, float64, ...RecordMetricOption)
+}
+
+// RecordMetricOption applies configuration to a recorded metric.
+type RecordMetricOption func(o *RecordMetricOptions)
+
+// RecordMetricOptions represents configuration for a recorded metric.
+type RecordMetricOptions struct {
+	Properties smithy.Properties
+}