mirror of
https://github.com/open-telemetry/opentelemetry-go.git
synced 2025-03-29 21:47:00 +02:00
f5b4e99025
Part of #5412 - Use the recommended package name for the instrumentation exemplified in the repository. - Use the recommended detection of a `TracerProvider` from passed context.
31 lines
882 B
Go
31 lines
882 B
Go
// Copyright The OpenTelemetry Authors
|
|
// SPDX-License-Identifier: Apache-2.0
|
|
|
|
package foo // import "go.opentelemetry.io/otel/example/namedtracer/foo"
|
|
|
|
import (
|
|
"context"
|
|
|
|
"go.opentelemetry.io/otel"
|
|
"go.opentelemetry.io/otel/attribute"
|
|
"go.opentelemetry.io/otel/trace"
|
|
)
|
|
|
|
var lemonsKey = attribute.Key("ex.com/lemons")
|
|
|
|
// SubOperation is an example to demonstrate the use of named tracer.
|
|
// It creates a named tracer with its package path.
|
|
func SubOperation(ctx context.Context) error {
|
|
// Using global provider. Alternative is to have application provide a getter
|
|
// for its component to get the instance of the provider.
|
|
tr := otel.Tracer("go.opentelemetry.io/otel/example/namedtracer/foo")
|
|
|
|
var span trace.Span
|
|
_, span = tr.Start(ctx, "Sub operation...")
|
|
defer span.End()
|
|
span.SetAttributes(lemonsKey.String("five"))
|
|
span.AddEvent("Sub span event")
|
|
|
|
return nil
|
|
}
|