2021-09-02 23:02:08 +02:00
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// 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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package otlptracehttp_test
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import (
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"context"
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"log"
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"go.opentelemetry.io/otel"
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"go.opentelemetry.io/otel/exporters/otlp/otlptrace"
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"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp"
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"go.opentelemetry.io/otel/sdk/resource"
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sdktrace "go.opentelemetry.io/otel/sdk/trace"
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2021-10-22 17:43:47 +02:00
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semconv "go.opentelemetry.io/otel/semconv/v1.7.0"
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2021-09-02 23:02:08 +02:00
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"go.opentelemetry.io/otel/trace"
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)
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const (
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instrumentationName = "github.com/instrumentron"
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instrumentationVersion = "v0.1.0"
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)
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var (
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tracer = otel.GetTracerProvider().Tracer(
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instrumentationName,
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trace.WithInstrumentationVersion(instrumentationVersion),
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trace.WithSchemaURL(semconv.SchemaURL),
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)
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)
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func add(ctx context.Context, x, y int64) int64 {
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var span trace.Span
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_, span = tracer.Start(ctx, "Addition")
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defer span.End()
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return x + y
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}
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func multiply(ctx context.Context, x, y int64) int64 {
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var span trace.Span
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_, span = tracer.Start(ctx, "Multiplication")
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defer span.End()
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return x * y
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}
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func newResource() *resource.Resource {
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return resource.NewWithAttributes(
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semconv.SchemaURL,
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semconv.ServiceNameKey.String("otlptrace-example"),
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semconv.ServiceVersionKey.String("0.0.1"),
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)
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}
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func installExportPipeline(ctx context.Context) func() {
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client := otlptracehttp.NewClient()
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exporter, err := otlptrace.New(ctx, client)
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if err != nil {
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log.Fatalf("creating OTLP trace exporter: %v", err)
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}
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tracerProvider := sdktrace.NewTracerProvider(
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sdktrace.WithBatcher(exporter),
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sdktrace.WithResource(newResource()),
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)
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otel.SetTracerProvider(tracerProvider)
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return func() {
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if err := tracerProvider.Shutdown(ctx); err != nil {
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log.Fatalf("stopping tracer provider: %v", err)
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}
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}
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}
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func Example() {
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ctx := context.Background()
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// Registers a tracer Provider globally.
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cleanup := installExportPipeline(ctx)
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defer cleanup()
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log.Println("the answer is", add(ctx, multiply(ctx, multiply(ctx, 2, 2), 10), 2))
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}
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