tamakyi
e3e59e7c69
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63 lines
1.5 KiB
Go
63 lines
1.5 KiB
Go
// Copyright 2022 E99p1ant. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package tracing
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import (
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"go.opentelemetry.io/otel"
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"go.opentelemetry.io/otel/propagation"
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"go.opentelemetry.io/otel/trace"
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)
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// config is a group of options for this instrumentation.
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type config struct {
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TracerProvider trace.TracerProvider
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Propagators propagation.TextMapPropagator
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}
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// Option applies an option value for a config.
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type Option interface {
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apply(*config)
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}
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// newConfig returns a config configured with all the passed Options.
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func newConfig(opts []Option) *config {
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c := &config{
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Propagators: otel.GetTextMapPropagator(),
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TracerProvider: otel.GetTracerProvider(),
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}
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for _, o := range opts {
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o.apply(c)
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}
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return c
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}
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type propagatorsOption struct{ p propagation.TextMapPropagator }
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func (o propagatorsOption) apply(c *config) {
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if o.p != nil {
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c.Propagators = o.p
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}
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}
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// WithPropagators returns an Option to use the Propagators when extracting
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// and injecting trace context from HTTP requests.
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func WithPropagators(p propagation.TextMapPropagator) Option {
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return propagatorsOption{p: p}
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}
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type tracerProviderOption struct{ tp trace.TracerProvider }
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func (o tracerProviderOption) apply(c *config) {
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if o.tp != nil {
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c.TracerProvider = o.tp
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}
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}
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// WithTracerProvider returns an Option to use the TracerProvider when
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// creating a Tracer.
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func WithTracerProvider(tp trace.TracerProvider) Option {
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return tracerProviderOption{tp: tp}
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}
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