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3d6e8b5078
* Move global code to toplevel package * Move version function to toplevel package * Update changelog Co-authored-by: Tyler Yahn <MrAlias@users.noreply.github.com>
44 lines
1.3 KiB
Go
44 lines
1.3 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 foo // import "go.opentelemetry.io/otel/example/namedtracer/foo"
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import (
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"context"
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"go.opentelemetry.io/otel"
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"go.opentelemetry.io/otel/label"
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"go.opentelemetry.io/otel/trace"
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)
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var (
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lemonsKey = label.Key("ex.com/lemons")
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)
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// SubOperation is an example to demonstrate the use of named tracer.
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// It creates a named tracer with its package path.
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func SubOperation(ctx context.Context) error {
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// Using global provider. Alternative is to have application provide a getter
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// for its component to get the instance of the provider.
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tr := otel.Tracer("example/namedtracer/foo")
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var span trace.Span
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_, span = tr.Start(ctx, "Sub operation...")
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defer span.End()
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span.SetAttributes(lemonsKey.String("five"))
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span.AddEvent("Sub span event")
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return nil
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}
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