mirror of
https://github.com/open-telemetry/opentelemetry-go.git
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d6dd84f6fa
* Move otel/api/global to otel/global * Update global package references * Add changes to CHANGELOG
77 lines
2.1 KiB
Go
77 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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// Command zipkin is an example program that creates spans
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// and uploads to openzipkin collector.
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package main
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import (
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"context"
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"flag"
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"log"
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"os"
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"time"
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"go.opentelemetry.io/otel/global"
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"go.opentelemetry.io/otel/exporters/trace/zipkin"
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sdktrace "go.opentelemetry.io/otel/sdk/trace"
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)
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var logger = log.New(os.Stderr, "zipkin-example", log.Ldate|log.Ltime|log.Llongfile)
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// initTracer creates a new trace provider instance and registers it as global trace provider.
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func initTracer(url string) {
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// Create Zipkin Exporter and install it as a global tracer.
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//
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// For demoing purposes, always sample. In a production application, you should
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// configure the sampler to a trace.ParentBased(trace.TraceIDRatioBased) set at the desired
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// ratio.
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err := zipkin.InstallNewPipeline(
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url,
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"zipkin-test",
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zipkin.WithLogger(logger),
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zipkin.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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}
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func main() {
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url := flag.String("zipkin", "http://localhost:9411/api/v2/spans", "zipkin url")
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flag.Parse()
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initTracer(*url)
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ctx := context.Background()
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tr := global.TracerProvider().Tracer("component-main")
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ctx, span := tr.Start(ctx, "foo")
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<-time.After(6 * time.Millisecond)
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bar(ctx)
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<-time.After(6 * time.Millisecond)
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span.End()
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// Wait for the spans to be exported.
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<-time.After(5 * time.Second)
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}
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func bar(ctx context.Context) {
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tr := global.TracerProvider().Tracer("component-bar")
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_, span := tr.Start(ctx, "bar")
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<-time.After(6 * time.Millisecond)
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span.End()
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}
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