mirror of
https://github.com/open-telemetry/opentelemetry-go.git
synced 2024-12-16 10:19:23 +02:00
93 lines
2.4 KiB
Go
93 lines
2.4 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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package stdout_test
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import (
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"context"
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"log"
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"go.opentelemetry.io/otel/api/global"
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"go.opentelemetry.io/otel/api/metric"
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"go.opentelemetry.io/otel/api/trace"
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"go.opentelemetry.io/otel/exporters/stdout"
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"go.opentelemetry.io/otel/label"
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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 = global.TracerProvider().Tracer(
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instrumentationName,
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trace.WithInstrumentationVersion(instrumentationVersion),
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)
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meter = global.MeterProvider().Meter(
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instrumentationName,
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metric.WithInstrumentationVersion(instrumentationVersion),
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)
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loopCounter = metric.Must(meter).NewInt64Counter("function.loops")
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paramValue = metric.Must(meter).NewInt64ValueRecorder("function.param")
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nameKey = label.Key("function.name")
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)
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func add(ctx context.Context, x, y int64) int64 {
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nameKV := nameKey.String("add")
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var span trace.Span
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ctx, span = tracer.Start(ctx, "Addition")
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defer span.End()
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loopCounter.Add(ctx, 1, nameKV)
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paramValue.Record(ctx, x, nameKV)
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paramValue.Record(ctx, y, nameKV)
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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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nameKV := nameKey.String("multiply")
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var span trace.Span
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ctx, span = tracer.Start(ctx, "Multiplication")
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defer span.End()
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loopCounter.Add(ctx, 1, nameKV)
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paramValue.Record(ctx, x, nameKV)
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paramValue.Record(ctx, y, nameKV)
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return x * y
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}
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func Example() {
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exportOpts := []stdout.Option{
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stdout.WithQuantiles([]float64{0.5}),
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stdout.WithPrettyPrint(),
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}
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// Registers both a trace and meter Provider globally.
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pusher, err := stdout.InstallNewPipeline(exportOpts, nil)
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if err != nil {
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log.Fatal("Could not initialize stdout exporter:", err)
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}
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defer pusher.Stop()
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ctx := context.Background()
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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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