opentelemetry-go/example/grpc/config/config.go

// Copyright 2019, 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 config

import (
	"log"

	"go.opentelemetry.io/otel/api/global"
	"go.opentelemetry.io/otel/exporter/trace/stdout"
	sdktrace "go.opentelemetry.io/otel/sdk/trace"
)

// Init configures an OpenTelemetry exporter and trace provider
func Init() {
	exporter, err := stdout.NewExporter(stdout.Options{PrettyPrint: true})
	if err != nil {
		log.Fatal(err)
	}
	tp, err := sdktrace.NewProvider(
		sdktrace.WithConfig(sdktrace.Config{DefaultSampler: sdktrace.AlwaysSample()}),
		sdktrace.WithSyncer(exporter),
	)
	if err != nil {
		log.Fatal(err)
	}
	global.SetTraceProvider(tp)
}