mirror of
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125 lines
3.4 KiB
Go
125 lines
3.4 KiB
Go
// Copyright The OpenTelemetry Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package metric // import "go.opentelemetry.io/otel/metric"
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import (
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"go.opentelemetry.io/otel/metric/unit"
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)
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// InstrumentConfig contains options for metric instrument descriptors.
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type InstrumentConfig struct {
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description string
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unit unit.Unit
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}
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// Description describes the instrument in human-readable terms.
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func (cfg InstrumentConfig) Description() string {
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return cfg.description
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}
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// Unit describes the measurement unit for a instrument.
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func (cfg InstrumentConfig) Unit() unit.Unit {
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return cfg.unit
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}
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// InstrumentOption is an interface for applying metric instrument options.
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type InstrumentOption interface {
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// ApplyMeter is used to set a InstrumentOption value of a
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// InstrumentConfig.
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applyInstrument(*InstrumentConfig)
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}
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// NewInstrumentConfig creates a new InstrumentConfig
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// and applies all the given options.
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func NewInstrumentConfig(opts ...InstrumentOption) InstrumentConfig {
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var config InstrumentConfig
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for _, o := range opts {
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o.applyInstrument(&config)
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}
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return config
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}
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type instrumentOptionFunc func(*InstrumentConfig)
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func (fn instrumentOptionFunc) applyInstrument(cfg *InstrumentConfig) {
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fn(cfg)
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}
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// WithDescription applies provided description.
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func WithDescription(desc string) InstrumentOption {
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return instrumentOptionFunc(func(cfg *InstrumentConfig) {
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cfg.description = desc
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})
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}
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// WithUnit applies provided unit.
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func WithUnit(unit unit.Unit) InstrumentOption {
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return instrumentOptionFunc(func(cfg *InstrumentConfig) {
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cfg.unit = unit
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})
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}
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// MeterConfig contains options for Meters.
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type MeterConfig struct {
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instrumentationVersion string
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schemaURL string
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}
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// InstrumentationVersion is the version of the library providing instrumentation.
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func (cfg MeterConfig) InstrumentationVersion() string {
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return cfg.instrumentationVersion
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}
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// SchemaURL is the schema_url of the library providing instrumentation.
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func (cfg MeterConfig) SchemaURL() string {
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return cfg.schemaURL
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}
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// MeterOption is an interface for applying Meter options.
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type MeterOption interface {
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// ApplyMeter is used to set a MeterOption value of a MeterConfig.
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applyMeter(*MeterConfig)
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}
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// NewMeterConfig creates a new MeterConfig and applies
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// all the given options.
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func NewMeterConfig(opts ...MeterOption) MeterConfig {
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var config MeterConfig
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for _, o := range opts {
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o.applyMeter(&config)
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}
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return config
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}
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type meterOptionFunc func(*MeterConfig)
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func (fn meterOptionFunc) applyMeter(cfg *MeterConfig) {
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fn(cfg)
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}
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// WithInstrumentationVersion sets the instrumentation version.
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func WithInstrumentationVersion(version string) MeterOption {
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return meterOptionFunc(func(config *MeterConfig) {
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config.instrumentationVersion = version
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})
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}
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// WithSchemaURL sets the schema URL.
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func WithSchemaURL(schemaURL string) MeterOption {
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return meterOptionFunc(func(config *MeterConfig) {
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config.schemaURL = schemaURL
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})
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}
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