mirror of
https://github.com/open-telemetry/opentelemetry-go.git
synced 2024-12-12 10:04:29 +02:00
80 lines
2.1 KiB
Go
80 lines
2.1 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 main
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import (
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"context"
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"log"
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"go.opentelemetry.io/otel/api/kv"
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"go.opentelemetry.io/otel/api/correlation"
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"go.opentelemetry.io/otel/api/global"
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"go.opentelemetry.io/otel/api/trace"
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"go.opentelemetry.io/otel/example/namedtracer/foo"
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"go.opentelemetry.io/otel/exporters/trace/stdout"
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sdktrace "go.opentelemetry.io/otel/sdk/trace"
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)
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var (
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fooKey = kv.Key("ex.com/foo")
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barKey = kv.Key("ex.com/bar")
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anotherKey = kv.Key("ex.com/another")
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)
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var tp *sdktrace.Provider
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// initTracer creates and registers trace provider instance.
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func initTracer() {
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var err error
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exp, err := stdout.NewExporter(stdout.Options{})
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if err != nil {
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log.Panicf("failed to initialize stdout exporter %v\n", err)
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return
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}
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tp, err = sdktrace.NewProvider(sdktrace.WithSyncer(exp),
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sdktrace.WithConfig(sdktrace.Config{DefaultSampler: sdktrace.AlwaysSample()}))
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if err != nil {
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log.Panicf("failed to initialize trace provider %v\n", err)
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}
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global.SetTraceProvider(tp)
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}
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func main() {
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// initialize trace provider.
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initTracer()
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// Create a named tracer with package path as its name.
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tracer := tp.Tracer("example/namedtracer/main")
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ctx := context.Background()
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ctx = correlation.NewContext(ctx,
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fooKey.String("foo1"),
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barKey.String("bar1"),
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)
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err := tracer.WithSpan(ctx, "operation", func(ctx context.Context) error {
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trace.SpanFromContext(ctx).AddEvent(ctx, "Nice operation!", kv.Key("bogons").Int(100))
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trace.SpanFromContext(ctx).SetAttributes(anotherKey.String("yes"))
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return foo.SubOperation(ctx)
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})
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if err != nil {
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panic(err)
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}
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}
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