gitea/vendor/go.opentelemetry.io/otel/metric/metric.go

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// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package metric // import "go.opentelemetry.io/otel/metric"
import (
"context"
"go.opentelemetry.io/otel/label"
"go.opentelemetry.io/otel/metric/number"
"go.opentelemetry.io/otel/unit"
)
// MeterProvider supports named Meter instances.
type MeterProvider interface {
// Meter creates an implementation of the Meter interface.
// The instrumentationName must be the name of the library providing
// instrumentation. This name may be the same as the instrumented code
// only if that code provides built-in instrumentation. If the
// instrumentationName is empty, then a implementation defined default
// name will be used instead.
Meter(instrumentationName string, opts ...MeterOption) Meter
}
// Meter is the creator of metric instruments.
//
// An uninitialized Meter is a no-op implementation.
type Meter struct {
impl MeterImpl
name, version string
}
// RecordBatch atomically records a batch of measurements.
func (m Meter) RecordBatch(ctx context.Context, ls []label.KeyValue, ms ...Measurement) {
if m.impl == nil {
return
}
m.impl.RecordBatch(ctx, ls, ms...)
}
// NewBatchObserver creates a new BatchObserver that supports
// making batches of observations for multiple instruments.
func (m Meter) NewBatchObserver(callback BatchObserverFunc) BatchObserver {
return BatchObserver{
meter: m,
runner: newBatchAsyncRunner(callback),
}
}
// NewInt64Counter creates a new integer Counter instrument with the
// given name, customized with options. May return an error if the
// name is invalid (e.g., empty) or improperly registered (e.g.,
// duplicate registration).
func (m Meter) NewInt64Counter(name string, options ...InstrumentOption) (Int64Counter, error) {
return wrapInt64CounterInstrument(
m.newSync(name, CounterInstrumentKind, number.Int64Kind, options))
}
// NewFloat64Counter creates a new floating point Counter with the
// given name, customized with options. May return an error if the
// name is invalid (e.g., empty) or improperly registered (e.g.,
// duplicate registration).
func (m Meter) NewFloat64Counter(name string, options ...InstrumentOption) (Float64Counter, error) {
return wrapFloat64CounterInstrument(
m.newSync(name, CounterInstrumentKind, number.Float64Kind, options))
}
// NewInt64UpDownCounter creates a new integer UpDownCounter instrument with the
// given name, customized with options. May return an error if the
// name is invalid (e.g., empty) or improperly registered (e.g.,
// duplicate registration).
func (m Meter) NewInt64UpDownCounter(name string, options ...InstrumentOption) (Int64UpDownCounter, error) {
return wrapInt64UpDownCounterInstrument(
m.newSync(name, UpDownCounterInstrumentKind, number.Int64Kind, options))
}
// NewFloat64UpDownCounter creates a new floating point UpDownCounter with the
// given name, customized with options. May return an error if the
// name is invalid (e.g., empty) or improperly registered (e.g.,
// duplicate registration).
func (m Meter) NewFloat64UpDownCounter(name string, options ...InstrumentOption) (Float64UpDownCounter, error) {
return wrapFloat64UpDownCounterInstrument(
m.newSync(name, UpDownCounterInstrumentKind, number.Float64Kind, options))
}
// NewInt64ValueRecorder creates a new integer ValueRecorder instrument with the
// given name, customized with options. May return an error if the
// name is invalid (e.g., empty) or improperly registered (e.g.,
// duplicate registration).
func (m Meter) NewInt64ValueRecorder(name string, opts ...InstrumentOption) (Int64ValueRecorder, error) {
return wrapInt64ValueRecorderInstrument(
m.newSync(name, ValueRecorderInstrumentKind, number.Int64Kind, opts))
}
// NewFloat64ValueRecorder creates a new floating point ValueRecorder with the
// given name, customized with options. May return an error if the
// name is invalid (e.g., empty) or improperly registered (e.g.,
// duplicate registration).
func (m Meter) NewFloat64ValueRecorder(name string, opts ...InstrumentOption) (Float64ValueRecorder, error) {
return wrapFloat64ValueRecorderInstrument(
m.newSync(name, ValueRecorderInstrumentKind, number.Float64Kind, opts))
}
// NewInt64ValueObserver creates a new integer ValueObserver instrument
// with the given name, running a given callback, and customized with
// options. May return an error if the name is invalid (e.g., empty)
// or improperly registered (e.g., duplicate registration).
func (m Meter) NewInt64ValueObserver(name string, callback Int64ObserverFunc, opts ...InstrumentOption) (Int64ValueObserver, error) {
if callback == nil {
return wrapInt64ValueObserverInstrument(NoopAsync{}, nil)
}
return wrapInt64ValueObserverInstrument(
m.newAsync(name, ValueObserverInstrumentKind, number.Int64Kind, opts,
newInt64AsyncRunner(callback)))
}
// NewFloat64ValueObserver creates a new floating point ValueObserver with
// the given name, running a given callback, and customized with
// options. May return an error if the name is invalid (e.g., empty)
// or improperly registered (e.g., duplicate registration).
func (m Meter) NewFloat64ValueObserver(name string, callback Float64ObserverFunc, opts ...InstrumentOption) (Float64ValueObserver, error) {
if callback == nil {
return wrapFloat64ValueObserverInstrument(NoopAsync{}, nil)
}
return wrapFloat64ValueObserverInstrument(
m.newAsync(name, ValueObserverInstrumentKind, number.Float64Kind, opts,
newFloat64AsyncRunner(callback)))
}
// NewInt64SumObserver creates a new integer SumObserver instrument
// with the given name, running a given callback, and customized with
// options. May return an error if the name is invalid (e.g., empty)
// or improperly registered (e.g., duplicate registration).
func (m Meter) NewInt64SumObserver(name string, callback Int64ObserverFunc, opts ...InstrumentOption) (Int64SumObserver, error) {
if callback == nil {
return wrapInt64SumObserverInstrument(NoopAsync{}, nil)
}
return wrapInt64SumObserverInstrument(
m.newAsync(name, SumObserverInstrumentKind, number.Int64Kind, opts,
newInt64AsyncRunner(callback)))
}
// NewFloat64SumObserver creates a new floating point SumObserver with
// the given name, running a given callback, and customized with
// options. May return an error if the name is invalid (e.g., empty)
// or improperly registered (e.g., duplicate registration).
func (m Meter) NewFloat64SumObserver(name string, callback Float64ObserverFunc, opts ...InstrumentOption) (Float64SumObserver, error) {
if callback == nil {
return wrapFloat64SumObserverInstrument(NoopAsync{}, nil)
}
return wrapFloat64SumObserverInstrument(
m.newAsync(name, SumObserverInstrumentKind, number.Float64Kind, opts,
newFloat64AsyncRunner(callback)))
}
// NewInt64UpDownSumObserver creates a new integer UpDownSumObserver instrument
// with the given name, running a given callback, and customized with
// options. May return an error if the name is invalid (e.g., empty)
// or improperly registered (e.g., duplicate registration).
func (m Meter) NewInt64UpDownSumObserver(name string, callback Int64ObserverFunc, opts ...InstrumentOption) (Int64UpDownSumObserver, error) {
if callback == nil {
return wrapInt64UpDownSumObserverInstrument(NoopAsync{}, nil)
}
return wrapInt64UpDownSumObserverInstrument(
m.newAsync(name, UpDownSumObserverInstrumentKind, number.Int64Kind, opts,
newInt64AsyncRunner(callback)))
}
// NewFloat64UpDownSumObserver creates a new floating point UpDownSumObserver with
// the given name, running a given callback, and customized with
// options. May return an error if the name is invalid (e.g., empty)
// or improperly registered (e.g., duplicate registration).
func (m Meter) NewFloat64UpDownSumObserver(name string, callback Float64ObserverFunc, opts ...InstrumentOption) (Float64UpDownSumObserver, error) {
if callback == nil {
return wrapFloat64UpDownSumObserverInstrument(NoopAsync{}, nil)
}
return wrapFloat64UpDownSumObserverInstrument(
m.newAsync(name, UpDownSumObserverInstrumentKind, number.Float64Kind, opts,
newFloat64AsyncRunner(callback)))
}
// NewInt64ValueObserver creates a new integer ValueObserver instrument
// with the given name, running in a batch callback, and customized with
// options. May return an error if the name is invalid (e.g., empty)
// or improperly registered (e.g., duplicate registration).
func (b BatchObserver) NewInt64ValueObserver(name string, opts ...InstrumentOption) (Int64ValueObserver, error) {
if b.runner == nil {
return wrapInt64ValueObserverInstrument(NoopAsync{}, nil)
}
return wrapInt64ValueObserverInstrument(
b.meter.newAsync(name, ValueObserverInstrumentKind, number.Int64Kind, opts, b.runner))
}
// NewFloat64ValueObserver creates a new floating point ValueObserver with
// the given name, running in a batch callback, and customized with
// options. May return an error if the name is invalid (e.g., empty)
// or improperly registered (e.g., duplicate registration).
func (b BatchObserver) NewFloat64ValueObserver(name string, opts ...InstrumentOption) (Float64ValueObserver, error) {
if b.runner == nil {
return wrapFloat64ValueObserverInstrument(NoopAsync{}, nil)
}
return wrapFloat64ValueObserverInstrument(
b.meter.newAsync(name, ValueObserverInstrumentKind, number.Float64Kind, opts,
b.runner))
}
// NewInt64SumObserver creates a new integer SumObserver instrument
// with the given name, running in a batch callback, and customized with
// options. May return an error if the name is invalid (e.g., empty)
// or improperly registered (e.g., duplicate registration).
func (b BatchObserver) NewInt64SumObserver(name string, opts ...InstrumentOption) (Int64SumObserver, error) {
if b.runner == nil {
return wrapInt64SumObserverInstrument(NoopAsync{}, nil)
}
return wrapInt64SumObserverInstrument(
b.meter.newAsync(name, SumObserverInstrumentKind, number.Int64Kind, opts, b.runner))
}
// NewFloat64SumObserver creates a new floating point SumObserver with
// the given name, running in a batch callback, and customized with
// options. May return an error if the name is invalid (e.g., empty)
// or improperly registered (e.g., duplicate registration).
func (b BatchObserver) NewFloat64SumObserver(name string, opts ...InstrumentOption) (Float64SumObserver, error) {
if b.runner == nil {
return wrapFloat64SumObserverInstrument(NoopAsync{}, nil)
}
return wrapFloat64SumObserverInstrument(
b.meter.newAsync(name, SumObserverInstrumentKind, number.Float64Kind, opts,
b.runner))
}
// NewInt64UpDownSumObserver creates a new integer UpDownSumObserver instrument
// with the given name, running in a batch callback, and customized with
// options. May return an error if the name is invalid (e.g., empty)
// or improperly registered (e.g., duplicate registration).
func (b BatchObserver) NewInt64UpDownSumObserver(name string, opts ...InstrumentOption) (Int64UpDownSumObserver, error) {
if b.runner == nil {
return wrapInt64UpDownSumObserverInstrument(NoopAsync{}, nil)
}
return wrapInt64UpDownSumObserverInstrument(
b.meter.newAsync(name, UpDownSumObserverInstrumentKind, number.Int64Kind, opts, b.runner))
}
// NewFloat64UpDownSumObserver creates a new floating point UpDownSumObserver with
// the given name, running in a batch callback, and customized with
// options. May return an error if the name is invalid (e.g., empty)
// or improperly registered (e.g., duplicate registration).
func (b BatchObserver) NewFloat64UpDownSumObserver(name string, opts ...InstrumentOption) (Float64UpDownSumObserver, error) {
if b.runner == nil {
return wrapFloat64UpDownSumObserverInstrument(NoopAsync{}, nil)
}
return wrapFloat64UpDownSumObserverInstrument(
b.meter.newAsync(name, UpDownSumObserverInstrumentKind, number.Float64Kind, opts,
b.runner))
}
// MeterImpl returns the underlying MeterImpl of this Meter.
func (m Meter) MeterImpl() MeterImpl {
return m.impl
}
// newAsync constructs one new asynchronous instrument.
func (m Meter) newAsync(
name string,
mkind InstrumentKind,
nkind number.Kind,
opts []InstrumentOption,
runner AsyncRunner,
) (
AsyncImpl,
error,
) {
if m.impl == nil {
return NoopAsync{}, nil
}
desc := NewDescriptor(name, mkind, nkind, opts...)
desc.config.InstrumentationName = m.name
desc.config.InstrumentationVersion = m.version
return m.impl.NewAsyncInstrument(desc, runner)
}
// newSync constructs one new synchronous instrument.
func (m Meter) newSync(
name string,
metricKind InstrumentKind,
numberKind number.Kind,
opts []InstrumentOption,
) (
SyncImpl,
error,
) {
if m.impl == nil {
return NoopSync{}, nil
}
desc := NewDescriptor(name, metricKind, numberKind, opts...)
desc.config.InstrumentationName = m.name
desc.config.InstrumentationVersion = m.version
return m.impl.NewSyncInstrument(desc)
}
// MeterMust is a wrapper for Meter interfaces that panics when any
// instrument constructor encounters an error.
type MeterMust struct {
meter Meter
}
// BatchObserverMust is a wrapper for BatchObserver that panics when
// any instrument constructor encounters an error.
type BatchObserverMust struct {
batch BatchObserver
}
// Must constructs a MeterMust implementation from a Meter, allowing
// the application to panic when any instrument constructor yields an
// error.
func Must(meter Meter) MeterMust {
return MeterMust{meter: meter}
}
// NewInt64Counter calls `Meter.NewInt64Counter` and returns the
// instrument, panicking if it encounters an error.
func (mm MeterMust) NewInt64Counter(name string, cos ...InstrumentOption) Int64Counter {
if inst, err := mm.meter.NewInt64Counter(name, cos...); err != nil {
panic(err)
} else {
return inst
}
}
// NewFloat64Counter calls `Meter.NewFloat64Counter` and returns the
// instrument, panicking if it encounters an error.
func (mm MeterMust) NewFloat64Counter(name string, cos ...InstrumentOption) Float64Counter {
if inst, err := mm.meter.NewFloat64Counter(name, cos...); err != nil {
panic(err)
} else {
return inst
}
}
// NewInt64UpDownCounter calls `Meter.NewInt64UpDownCounter` and returns the
// instrument, panicking if it encounters an error.
func (mm MeterMust) NewInt64UpDownCounter(name string, cos ...InstrumentOption) Int64UpDownCounter {
if inst, err := mm.meter.NewInt64UpDownCounter(name, cos...); err != nil {
panic(err)
} else {
return inst
}
}
// NewFloat64UpDownCounter calls `Meter.NewFloat64UpDownCounter` and returns the
// instrument, panicking if it encounters an error.
func (mm MeterMust) NewFloat64UpDownCounter(name string, cos ...InstrumentOption) Float64UpDownCounter {
if inst, err := mm.meter.NewFloat64UpDownCounter(name, cos...); err != nil {
panic(err)
} else {
return inst
}
}
// NewInt64ValueRecorder calls `Meter.NewInt64ValueRecorder` and returns the
// instrument, panicking if it encounters an error.
func (mm MeterMust) NewInt64ValueRecorder(name string, mos ...InstrumentOption) Int64ValueRecorder {
if inst, err := mm.meter.NewInt64ValueRecorder(name, mos...); err != nil {
panic(err)
} else {
return inst
}
}
// NewFloat64ValueRecorder calls `Meter.NewFloat64ValueRecorder` and returns the
// instrument, panicking if it encounters an error.
func (mm MeterMust) NewFloat64ValueRecorder(name string, mos ...InstrumentOption) Float64ValueRecorder {
if inst, err := mm.meter.NewFloat64ValueRecorder(name, mos...); err != nil {
panic(err)
} else {
return inst
}
}
// NewInt64ValueObserver calls `Meter.NewInt64ValueObserver` and
// returns the instrument, panicking if it encounters an error.
func (mm MeterMust) NewInt64ValueObserver(name string, callback Int64ObserverFunc, oos ...InstrumentOption) Int64ValueObserver {
if inst, err := mm.meter.NewInt64ValueObserver(name, callback, oos...); err != nil {
panic(err)
} else {
return inst
}
}
// NewFloat64ValueObserver calls `Meter.NewFloat64ValueObserver` and
// returns the instrument, panicking if it encounters an error.
func (mm MeterMust) NewFloat64ValueObserver(name string, callback Float64ObserverFunc, oos ...InstrumentOption) Float64ValueObserver {
if inst, err := mm.meter.NewFloat64ValueObserver(name, callback, oos...); err != nil {
panic(err)
} else {
return inst
}
}
// NewInt64SumObserver calls `Meter.NewInt64SumObserver` and
// returns the instrument, panicking if it encounters an error.
func (mm MeterMust) NewInt64SumObserver(name string, callback Int64ObserverFunc, oos ...InstrumentOption) Int64SumObserver {
if inst, err := mm.meter.NewInt64SumObserver(name, callback, oos...); err != nil {
panic(err)
} else {
return inst
}
}
// NewFloat64SumObserver calls `Meter.NewFloat64SumObserver` and
// returns the instrument, panicking if it encounters an error.
func (mm MeterMust) NewFloat64SumObserver(name string, callback Float64ObserverFunc, oos ...InstrumentOption) Float64SumObserver {
if inst, err := mm.meter.NewFloat64SumObserver(name, callback, oos...); err != nil {
panic(err)
} else {
return inst
}
}
// NewInt64UpDownSumObserver calls `Meter.NewInt64UpDownSumObserver` and
// returns the instrument, panicking if it encounters an error.
func (mm MeterMust) NewInt64UpDownSumObserver(name string, callback Int64ObserverFunc, oos ...InstrumentOption) Int64UpDownSumObserver {
if inst, err := mm.meter.NewInt64UpDownSumObserver(name, callback, oos...); err != nil {
panic(err)
} else {
return inst
}
}
// NewFloat64UpDownSumObserver calls `Meter.NewFloat64UpDownSumObserver` and
// returns the instrument, panicking if it encounters an error.
func (mm MeterMust) NewFloat64UpDownSumObserver(name string, callback Float64ObserverFunc, oos ...InstrumentOption) Float64UpDownSumObserver {
if inst, err := mm.meter.NewFloat64UpDownSumObserver(name, callback, oos...); err != nil {
panic(err)
} else {
return inst
}
}
// NewBatchObserver returns a wrapper around BatchObserver that panics
// when any instrument constructor returns an error.
func (mm MeterMust) NewBatchObserver(callback BatchObserverFunc) BatchObserverMust {
return BatchObserverMust{
batch: mm.meter.NewBatchObserver(callback),
}
}
// NewInt64ValueObserver calls `BatchObserver.NewInt64ValueObserver` and
// returns the instrument, panicking if it encounters an error.
func (bm BatchObserverMust) NewInt64ValueObserver(name string, oos ...InstrumentOption) Int64ValueObserver {
if inst, err := bm.batch.NewInt64ValueObserver(name, oos...); err != nil {
panic(err)
} else {
return inst
}
}
// NewFloat64ValueObserver calls `BatchObserver.NewFloat64ValueObserver` and
// returns the instrument, panicking if it encounters an error.
func (bm BatchObserverMust) NewFloat64ValueObserver(name string, oos ...InstrumentOption) Float64ValueObserver {
if inst, err := bm.batch.NewFloat64ValueObserver(name, oos...); err != nil {
panic(err)
} else {
return inst
}
}
// NewInt64SumObserver calls `BatchObserver.NewInt64SumObserver` and
// returns the instrument, panicking if it encounters an error.
func (bm BatchObserverMust) NewInt64SumObserver(name string, oos ...InstrumentOption) Int64SumObserver {
if inst, err := bm.batch.NewInt64SumObserver(name, oos...); err != nil {
panic(err)
} else {
return inst
}
}
// NewFloat64SumObserver calls `BatchObserver.NewFloat64SumObserver` and
// returns the instrument, panicking if it encounters an error.
func (bm BatchObserverMust) NewFloat64SumObserver(name string, oos ...InstrumentOption) Float64SumObserver {
if inst, err := bm.batch.NewFloat64SumObserver(name, oos...); err != nil {
panic(err)
} else {
return inst
}
}
// NewInt64UpDownSumObserver calls `BatchObserver.NewInt64UpDownSumObserver` and
// returns the instrument, panicking if it encounters an error.
func (bm BatchObserverMust) NewInt64UpDownSumObserver(name string, oos ...InstrumentOption) Int64UpDownSumObserver {
if inst, err := bm.batch.NewInt64UpDownSumObserver(name, oos...); err != nil {
panic(err)
} else {
return inst
}
}
// NewFloat64UpDownSumObserver calls `BatchObserver.NewFloat64UpDownSumObserver` and
// returns the instrument, panicking if it encounters an error.
func (bm BatchObserverMust) NewFloat64UpDownSumObserver(name string, oos ...InstrumentOption) Float64UpDownSumObserver {
if inst, err := bm.batch.NewFloat64UpDownSumObserver(name, oos...); err != nil {
panic(err)
} else {
return inst
}
}
// Descriptor contains all the settings that describe an instrument,
// including its name, metric kind, number kind, and the configurable
// options.
type Descriptor struct {
name string
instrumentKind InstrumentKind
numberKind number.Kind
config InstrumentConfig
}
// NewDescriptor returns a Descriptor with the given contents.
func NewDescriptor(name string, ikind InstrumentKind, nkind number.Kind, opts ...InstrumentOption) Descriptor {
return Descriptor{
name: name,
instrumentKind: ikind,
numberKind: nkind,
config: NewInstrumentConfig(opts...),
}
}
// Name returns the metric instrument's name.
func (d Descriptor) Name() string {
return d.name
}
// InstrumentKind returns the specific kind of instrument.
func (d Descriptor) InstrumentKind() InstrumentKind {
return d.instrumentKind
}
// Description provides a human-readable description of the metric
// instrument.
func (d Descriptor) Description() string {
return d.config.Description
}
// Unit describes the units of the metric instrument. Unitless
// metrics return the empty string.
func (d Descriptor) Unit() unit.Unit {
return d.config.Unit
}
// NumberKind returns whether this instrument is declared over int64,
// float64, or uint64 values.
func (d Descriptor) NumberKind() number.Kind {
return d.numberKind
}
// InstrumentationName returns the name of the library that provided
// instrumentation for this instrument.
func (d Descriptor) InstrumentationName() string {
return d.config.InstrumentationName
}
// InstrumentationVersion returns the version of the library that provided
// instrumentation for this instrument.
func (d Descriptor) InstrumentationVersion() string {
return d.config.InstrumentationVersion
}