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opentelemetry-go/example/jaeger/main.go
Jaana Dogan 23e32b19ec
Minor readability fixes to the Jeager example (#1282)
Consistency with deferring span.End, variable names.

Co-authored-by: Tyler Yahn <MrAlias@users.noreply.github.com>
2020-10-28 08:08:13 -07:00

70 lines
1.8 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.
// Command jaeger is an example program that creates spans
// and uploads to Jaeger.
package main
import (
"context"
"log"
"go.opentelemetry.io/otel/global"
"go.opentelemetry.io/otel/label"
"go.opentelemetry.io/otel/exporters/trace/jaeger"
sdktrace "go.opentelemetry.io/otel/sdk/trace"
)
// initTracer creates a new trace provider instance and registers it as global trace provider.
func initTracer() func() {
// Create and install Jaeger export pipeline.
flush, err := jaeger.InstallNewPipeline(
jaeger.WithCollectorEndpoint("http://localhost:14268/api/traces"),
jaeger.WithProcess(jaeger.Process{
ServiceName: "trace-demo",
Tags: []label.KeyValue{
label.String("exporter", "jaeger"),
label.Float64("float", 312.23),
},
}),
jaeger.WithSDK(&sdktrace.Config{DefaultSampler: sdktrace.AlwaysSample()}),
)
if err != nil {
log.Fatal(err)
}
return flush
}
func main() {
ctx := context.Background()
flush := initTracer()
defer flush()
tr := global.Tracer("component-main")
ctx, span := tr.Start(ctx, "foo")
defer span.End()
bar(ctx)
}
func bar(ctx context.Context) {
tr := global.Tracer("component-bar")
_, span := tr.Start(ctx, "bar")
defer span.End()
// Do bar...
}