mirror of
https://github.com/open-telemetry/opentelemetry-go.git
synced 2024-12-14 10:13:10 +02:00
127 lines
3.5 KiB
Go
127 lines
3.5 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 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/correlation"
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"go.opentelemetry.io/otel/api/global"
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"go.opentelemetry.io/otel/api/kv"
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"go.opentelemetry.io/otel/api/metric"
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"go.opentelemetry.io/otel/api/trace"
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metricstdout "go.opentelemetry.io/otel/exporters/metric/stdout"
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tracestdout "go.opentelemetry.io/otel/exporters/trace/stdout"
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"go.opentelemetry.io/otel/sdk/metric/controller/push"
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sdktrace "go.opentelemetry.io/otel/sdk/trace"
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)
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var (
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fooKey = kv.Key("ex.com/foo")
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barKey = kv.Key("ex.com/bar")
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lemonsKey = kv.Key("ex.com/lemons")
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anotherKey = kv.Key("ex.com/another")
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)
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// initTracer creates and registers trace provider instance.
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func initTracer() {
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var err error
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exp, err := tracestdout.NewExporter(tracestdout.Options{PrettyPrint: false})
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if err != nil {
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log.Panicf("failed to initialize trace stdout exporter %v", err)
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return
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}
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tp, err := sdktrace.NewProvider(sdktrace.WithSyncer(exp),
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sdktrace.WithConfig(sdktrace.Config{DefaultSampler: sdktrace.AlwaysSample()}),
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sdktrace.WithResourceAttributes(kv.String("rk1", "rv11"), kv.Int64("rk2", 5)))
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if err != nil {
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log.Panicf("failed to initialize trace provider %v", err)
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}
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global.SetTraceProvider(tp)
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}
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func initMeter() *push.Controller {
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pusher, err := metricstdout.InstallNewPipeline(metricstdout.Config{
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Quantiles: []float64{0.5, 0.9, 0.99},
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PrettyPrint: false,
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})
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if err != nil {
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log.Panicf("failed to initialize metric stdout exporter %v", err)
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}
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return pusher
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}
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func main() {
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defer initMeter().Stop()
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initTracer()
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tracer := global.Tracer("ex.com/basic")
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meter := global.Meter("ex.com/basic")
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commonLabels := []kv.KeyValue{lemonsKey.Int(10), kv.String("A", "1"), kv.String("B", "2"), kv.String("C", "3")}
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oneMetricCB := func(result metric.Float64ObserverResult) {
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result.Observe(1, commonLabels...)
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}
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_ = metric.Must(meter).RegisterFloat64Observer("ex.com.one", oneMetricCB,
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metric.WithDescription("An observer set to 1.0"),
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)
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measureTwo := metric.Must(meter).NewFloat64Measure("ex.com.two")
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ctx := context.Background()
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ctx = correlation.NewContext(ctx,
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fooKey.String("foo1"),
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barKey.String("bar1"),
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)
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measure := measureTwo.Bind(commonLabels...)
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defer measure.Unbind()
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err := tracer.WithSpan(ctx, "operation", func(ctx context.Context) error {
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trace.SpanFromContext(ctx).AddEvent(ctx, "Nice operation!", kv.Key("bogons").Int(100))
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trace.SpanFromContext(ctx).SetAttributes(anotherKey.String("yes"))
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meter.RecordBatch(
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// Note: call-site variables added as context Entries:
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correlation.NewContext(ctx, anotherKey.String("xyz")),
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commonLabels,
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measureTwo.Measurement(2.0),
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)
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return tracer.WithSpan(
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ctx,
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"Sub operation...",
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func(ctx context.Context) error {
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trace.SpanFromContext(ctx).SetAttributes(lemonsKey.String("five"))
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trace.SpanFromContext(ctx).AddEvent(ctx, "Sub span event")
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measure.Record(ctx, 1.3)
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return nil
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},
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)
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})
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if err != nil {
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panic(err)
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}
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}
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