peridot/vendor/go.opentelemetry.io/otel/metric/asyncfloat64.go
2024-10-16 12:56:53 +02:00

261 lines
9.3 KiB
Go

// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
package metric // import "go.opentelemetry.io/otel/metric"
import (
"context"
"go.opentelemetry.io/otel/metric/embedded"
)
// Float64Observable describes a set of instruments used asynchronously to
// record float64 measurements once per collection cycle. Observations of
// these instruments are only made within a callback.
//
// Warning: Methods may be added to this interface in minor releases.
type Float64Observable interface {
Observable
float64Observable()
}
// Float64ObservableCounter is an instrument used to asynchronously record
// increasing float64 measurements once per collection cycle. Observations are
// only made within a callback for this instrument. The value observed is
// assumed the to be the cumulative sum of the count.
//
// Warning: Methods may be added to this interface in minor releases. See
// package documentation on API implementation for information on how to set
// default behavior for
// unimplemented methods.
type Float64ObservableCounter interface {
// Users of the interface can ignore this. This embedded type is only used
// by implementations of this interface. See the "API Implementations"
// section of the package documentation for more information.
embedded.Float64ObservableCounter
Float64Observable
}
// Float64ObservableCounterConfig contains options for asynchronous counter
// instruments that record float64 values.
type Float64ObservableCounterConfig struct {
description string
unit string
callbacks []Float64Callback
}
// NewFloat64ObservableCounterConfig returns a new
// [Float64ObservableCounterConfig] with all opts applied.
func NewFloat64ObservableCounterConfig(opts ...Float64ObservableCounterOption) Float64ObservableCounterConfig {
var config Float64ObservableCounterConfig
for _, o := range opts {
config = o.applyFloat64ObservableCounter(config)
}
return config
}
// Description returns the configured description.
func (c Float64ObservableCounterConfig) Description() string {
return c.description
}
// Unit returns the configured unit.
func (c Float64ObservableCounterConfig) Unit() string {
return c.unit
}
// Callbacks returns the configured callbacks.
func (c Float64ObservableCounterConfig) Callbacks() []Float64Callback {
return c.callbacks
}
// Float64ObservableCounterOption applies options to a
// [Float64ObservableCounterConfig]. See [Float64ObservableOption] and
// [InstrumentOption] for other options that can be used as a
// Float64ObservableCounterOption.
type Float64ObservableCounterOption interface {
applyFloat64ObservableCounter(Float64ObservableCounterConfig) Float64ObservableCounterConfig
}
// Float64ObservableUpDownCounter is an instrument used to asynchronously
// record float64 measurements once per collection cycle. Observations are only
// made within a callback for this instrument. The value observed is assumed
// the to be the cumulative sum of the count.
//
// Warning: Methods may be added to this interface in minor releases. See
// package documentation on API implementation for information on how to set
// default behavior for unimplemented methods.
type Float64ObservableUpDownCounter interface {
// Users of the interface can ignore this. This embedded type is only used
// by implementations of this interface. See the "API Implementations"
// section of the package documentation for more information.
embedded.Float64ObservableUpDownCounter
Float64Observable
}
// Float64ObservableUpDownCounterConfig contains options for asynchronous
// counter instruments that record float64 values.
type Float64ObservableUpDownCounterConfig struct {
description string
unit string
callbacks []Float64Callback
}
// NewFloat64ObservableUpDownCounterConfig returns a new
// [Float64ObservableUpDownCounterConfig] with all opts applied.
func NewFloat64ObservableUpDownCounterConfig(opts ...Float64ObservableUpDownCounterOption) Float64ObservableUpDownCounterConfig {
var config Float64ObservableUpDownCounterConfig
for _, o := range opts {
config = o.applyFloat64ObservableUpDownCounter(config)
}
return config
}
// Description returns the configured description.
func (c Float64ObservableUpDownCounterConfig) Description() string {
return c.description
}
// Unit returns the configured unit.
func (c Float64ObservableUpDownCounterConfig) Unit() string {
return c.unit
}
// Callbacks returns the configured callbacks.
func (c Float64ObservableUpDownCounterConfig) Callbacks() []Float64Callback {
return c.callbacks
}
// Float64ObservableUpDownCounterOption applies options to a
// [Float64ObservableUpDownCounterConfig]. See [Float64ObservableOption] and
// [InstrumentOption] for other options that can be used as a
// Float64ObservableUpDownCounterOption.
type Float64ObservableUpDownCounterOption interface {
applyFloat64ObservableUpDownCounter(Float64ObservableUpDownCounterConfig) Float64ObservableUpDownCounterConfig
}
// Float64ObservableGauge is an instrument used to asynchronously record
// instantaneous float64 measurements once per collection cycle. Observations
// are only made within a callback for this instrument.
//
// Warning: Methods may be added to this interface in minor releases. See
// package documentation on API implementation for information on how to set
// default behavior for unimplemented methods.
type Float64ObservableGauge interface {
// Users of the interface can ignore this. This embedded type is only used
// by implementations of this interface. See the "API Implementations"
// section of the package documentation for more information.
embedded.Float64ObservableGauge
Float64Observable
}
// Float64ObservableGaugeConfig contains options for asynchronous counter
// instruments that record float64 values.
type Float64ObservableGaugeConfig struct {
description string
unit string
callbacks []Float64Callback
}
// NewFloat64ObservableGaugeConfig returns a new [Float64ObservableGaugeConfig]
// with all opts applied.
func NewFloat64ObservableGaugeConfig(opts ...Float64ObservableGaugeOption) Float64ObservableGaugeConfig {
var config Float64ObservableGaugeConfig
for _, o := range opts {
config = o.applyFloat64ObservableGauge(config)
}
return config
}
// Description returns the configured description.
func (c Float64ObservableGaugeConfig) Description() string {
return c.description
}
// Unit returns the configured unit.
func (c Float64ObservableGaugeConfig) Unit() string {
return c.unit
}
// Callbacks returns the configured callbacks.
func (c Float64ObservableGaugeConfig) Callbacks() []Float64Callback {
return c.callbacks
}
// Float64ObservableGaugeOption applies options to a
// [Float64ObservableGaugeConfig]. See [Float64ObservableOption] and
// [InstrumentOption] for other options that can be used as a
// Float64ObservableGaugeOption.
type Float64ObservableGaugeOption interface {
applyFloat64ObservableGauge(Float64ObservableGaugeConfig) Float64ObservableGaugeConfig
}
// Float64Observer is a recorder of float64 measurements.
//
// Warning: Methods may be added to this interface in minor releases. See
// package documentation on API implementation for information on how to set
// default behavior for unimplemented methods.
type Float64Observer interface {
// Users of the interface can ignore this. This embedded type is only used
// by implementations of this interface. See the "API Implementations"
// section of the package documentation for more information.
embedded.Float64Observer
// Observe records the float64 value.
//
// Use the WithAttributeSet (or, if performance is not a concern,
// the WithAttributes) option to include measurement attributes.
Observe(value float64, options ...ObserveOption)
}
// Float64Callback is a function registered with a Meter that makes
// observations for a Float64Observerable instrument it is registered with.
// Calls to the Float64Observer record measurement values for the
// Float64Observable.
//
// The function needs to complete in a finite amount of time and the deadline
// of the passed context is expected to be honored.
//
// The function needs to make unique observations across all registered
// Float64Callbacks. Meaning, it should not report measurements with the same
// attributes as another Float64Callbacks also registered for the same
// instrument.
//
// The function needs to be concurrent safe.
type Float64Callback func(context.Context, Float64Observer) error
// Float64ObservableOption applies options to float64 Observer instruments.
type Float64ObservableOption interface {
Float64ObservableCounterOption
Float64ObservableUpDownCounterOption
Float64ObservableGaugeOption
}
type float64CallbackOpt struct {
cback Float64Callback
}
func (o float64CallbackOpt) applyFloat64ObservableCounter(cfg Float64ObservableCounterConfig) Float64ObservableCounterConfig {
cfg.callbacks = append(cfg.callbacks, o.cback)
return cfg
}
func (o float64CallbackOpt) applyFloat64ObservableUpDownCounter(cfg Float64ObservableUpDownCounterConfig) Float64ObservableUpDownCounterConfig {
cfg.callbacks = append(cfg.callbacks, o.cback)
return cfg
}
func (o float64CallbackOpt) applyFloat64ObservableGauge(cfg Float64ObservableGaugeConfig) Float64ObservableGaugeConfig {
cfg.callbacks = append(cfg.callbacks, o.cback)
return cfg
}
// WithFloat64Callback adds callback to be called for an instrument.
func WithFloat64Callback(callback Float64Callback) Float64ObservableOption {
return float64CallbackOpt{callback}
}