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opentelemetry-go/example/namedtracer/main.go
Anthony Mirabella 06689a01bd
Rename CorrelationContext to Baggage (#1142)
* Rename 'correlation' to 'baggage'

* Rename CorrelationContext progator to Baggage

* Update CHANGELOG
2020-09-09 14:13:37 -04:00

79 lines
2.0 KiB
Go

// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package main
import (
"context"
"log"
"go.opentelemetry.io/otel/api/baggage"
"go.opentelemetry.io/otel/api/global"
"go.opentelemetry.io/otel/api/trace"
"go.opentelemetry.io/otel/example/namedtracer/foo"
"go.opentelemetry.io/otel/exporters/stdout"
"go.opentelemetry.io/otel/label"
sdktrace "go.opentelemetry.io/otel/sdk/trace"
)
var (
fooKey = label.Key("ex.com/foo")
barKey = label.Key("ex.com/bar")
anotherKey = label.Key("ex.com/another")
)
var tp *sdktrace.Provider
// initTracer creates and registers trace provider instance.
func initTracer() {
var err error
exp, err := stdout.NewExporter(stdout.WithPrettyPrint())
if err != nil {
log.Panicf("failed to initialize stdout exporter %v\n", err)
return
}
tp = sdktrace.NewProvider(
sdktrace.WithConfig(
sdktrace.Config{
DefaultSampler: sdktrace.AlwaysSample(),
},
),
sdktrace.WithBatcher(exp),
)
global.SetTracerProvider(tp)
}
func main() {
// initialize trace provider.
initTracer()
// Create a named tracer with package path as its name.
tracer := tp.Tracer("example/namedtracer/main")
ctx := context.Background()
ctx = baggage.NewContext(ctx,
fooKey.String("foo1"),
barKey.String("bar1"),
)
var span trace.Span
ctx, span = tracer.Start(ctx, "operation")
defer span.End()
span.AddEvent(ctx, "Nice operation!", label.Int("bogons", 100))
span.SetAttributes(anotherKey.String("yes"))
if err := foo.SubOperation(ctx); err != nil {
panic(err)
}
}