mirror of
https://github.com/open-telemetry/opentelemetry-go.git
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a485d0ec64
* Update License header for all source files - Add Apache 2.0 header to source files that did not have one. - Update all existing headers dated to 2019 to be 2020 - Remove comma from License header to comply with the Apache 2.0 guidelines. * Update Copyright notice Use the standard Copyright notices outlined by the [CNCF](https://github.com/cncf/foundation/blob/master/copyright-notices.md#copyright-notices)
74 lines
1.8 KiB
Go
74 lines
1.8 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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// Command jaeger is an example program that creates spans
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// and uploads to Jaeger.
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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/core"
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"go.opentelemetry.io/otel/api/global"
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"go.opentelemetry.io/otel/api/key"
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"go.opentelemetry.io/otel/exporters/trace/jaeger"
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sdktrace "go.opentelemetry.io/otel/sdk/trace"
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)
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// initTracer creates a new trace provider instance and registers it as global trace provider.
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func initTracer() func() {
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// Create and install Jaeger export pipeline
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_, flush, err := jaeger.NewExportPipeline(
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jaeger.WithCollectorEndpoint("http://localhost:14268/api/traces"),
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jaeger.WithProcess(jaeger.Process{
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ServiceName: "trace-demo",
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Tags: []core.KeyValue{
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key.String("exporter", "jaeger"),
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key.Float64("float", 312.23),
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},
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}),
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jaeger.RegisterAsGlobal(),
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jaeger.WithSDK(&sdktrace.Config{DefaultSampler: sdktrace.AlwaysSample()}),
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)
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if err != nil {
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log.Fatal(err)
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}
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return func() {
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flush()
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}
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}
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func main() {
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fn := initTracer()
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defer fn()
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ctx := context.Background()
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tr := global.Tracer("component-main")
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ctx, span := tr.Start(ctx, "foo")
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bar(ctx)
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span.End()
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}
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func bar(ctx context.Context) {
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tr := global.Tracer("component-bar")
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_, span := tr.Start(ctx, "bar")
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defer span.End()
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// Do bar...
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}
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