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config.go
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config.go
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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
package config // import "go.opentelemetry.io/contrib/config"
import (
"context"
"go.opentelemetry.io/otel/metric"
"go.opentelemetry.io/otel/trace"
)
type configOptions struct {
ctx context.Context
opentelemetryConfig OpenTelemetryConfiguration
}
// SDK is a struct that contains all the providers
// configured via the configuration model.
type SDK struct {
meterProvider metric.MeterProvider
tracerProvider trace.TracerProvider
}
// TracerProvider returns a configured trace.TracerProvider.
func (s *SDK) TracerProvider() trace.TracerProvider {
return s.tracerProvider
}
// MeterProvider returns a configured metric.MeterProvider.
func (s *SDK) MeterProvider() metric.MeterProvider {
return s.meterProvider
}
// NewSDK creates SDK providers based on the configuration model.
//
// Caution: The implementation only returns noop providers.
func NewSDK(opts ...ConfigurationOption) (SDK, error) {
o := configOptions{}
for _, opt := range opts {
o = opt.apply(o)
}
return SDK{
meterProvider: initMeterProvider(o),
tracerProvider: initTracerProvider(o),
}, nil
}
// ConfigurationOption configures options for providers.
type ConfigurationOption interface {
apply(configOptions) configOptions
}
type configurationOptionFunc func(configOptions) configOptions
func (fn configurationOptionFunc) apply(cfg configOptions) configOptions {
return fn(cfg)
}
// WithContext sets the context.Context for the SDK.
func WithContext(ctx context.Context) ConfigurationOption {
return configurationOptionFunc(func(c configOptions) configOptions {
c.ctx = ctx
return c
})
}
// WithOpenTelemetryConfiguration sets the OpenTelemetryConfiguration used
// to produce the SDK.
func WithOpenTelemetryConfiguration(cfg OpenTelemetryConfiguration) ConfigurationOption {
return configurationOptionFunc(func(c configOptions) configOptions {
c.opentelemetryConfig = cfg
return c
})
}
// TODO: implement parsing functionality:
// - https://github.com/open-telemetry/opentelemetry-go-contrib/issues/4373
// - https://github.com/open-telemetry/opentelemetry-go-contrib/issues/4412
// TODO: create SDK from the model:
// - https://github.com/open-telemetry/opentelemetry-go-contrib/issues/4371