mirror of
https://github.com/open-telemetry/opentelemetry-go.git
synced 2025-02-13 13:48:28 +02:00
1f5b159161
* Refactor golangci-lint conf Order settings alphabetically. * Add revive settings to golangci conf * Check blank imports * Check bool-literal-in-expr * Check constant-logical-expr * Check context-as-argument * Check context-key-type * Check deep-exit * Check defer * Check dot-imports * Check duplicated-imports * Check early-return * Check empty-block * Check empty-lines * Check error-naming * Check error-return * Check error-strings * Check errorf * Stop ignoring context first arg in tests * Check exported comments * Check flag-parameter * Check identical branches * Check if-return * Check increment-decrement * Check indent-error-flow * Check deny list of go imports * Check import shadowing * Check package comments * Check range * Check range val in closure * Check range val address * Check redefines builtin id * Check string-format * Check struct tag * Check superfluous else * Check time equal * Check var naming * Check var declaration * Check unconditional recursion * Check unexported return * Check unhandled errors * Check unnecessary stmt * Check unnecessary break * Check waitgroup by value * Exclude deep-exit check in example*_test.go files
112 lines
2.9 KiB
Go
112 lines
2.9 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 stdoutmetric_test
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import (
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"context"
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"fmt"
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"log"
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"go.opentelemetry.io/otel/attribute"
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"go.opentelemetry.io/otel/exporters/stdout/stdoutmetric"
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"go.opentelemetry.io/otel/metric"
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"go.opentelemetry.io/otel/metric/global"
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"go.opentelemetry.io/otel/metric/instrument/syncint64"
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controller "go.opentelemetry.io/otel/sdk/metric/controller/basic"
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processor "go.opentelemetry.io/otel/sdk/metric/processor/basic"
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"go.opentelemetry.io/otel/sdk/metric/selector/simple"
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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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loopCounter syncint64.Counter
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paramValue syncint64.Histogram
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nameKey = attribute.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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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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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 InstallExportPipeline(ctx context.Context) (func(context.Context) error, error) {
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exporter, err := stdoutmetric.New(stdoutmetric.WithPrettyPrint())
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if err != nil {
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return nil, fmt.Errorf("creating stdoutmetric exporter: %w", err)
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}
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pusher := controller.New(
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processor.NewFactory(
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simple.NewWithInexpensiveDistribution(),
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exporter,
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),
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controller.WithExporter(exporter),
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)
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if err = pusher.Start(ctx); err != nil {
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log.Fatalf("starting push controller: %v", err)
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}
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global.SetMeterProvider(pusher)
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meter := global.Meter(instrumentationName, metric.WithInstrumentationVersion(instrumentationVersion))
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loopCounter, err = meter.SyncInt64().Counter("function.loops")
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if err != nil {
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log.Fatalf("creating instrument: %v", err)
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}
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paramValue, err = meter.SyncInt64().Histogram("function.param")
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if err != nil {
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log.Fatalf("creating instrument: %v", err)
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}
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return pusher.Stop, nil
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}
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func Example() {
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ctx := context.Background()
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// TODO: Registers a meter Provider globally.
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shutdown, err := InstallExportPipeline(ctx)
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if err != nil {
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log.Fatal(err)
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}
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defer func() {
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if err := shutdown(ctx); err != nil {
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log.Fatal(err)
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}
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}()
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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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