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0e2fdfc682
* Update Process() * Checkpoint * Add subtractor; fix test * Fix all simple integrator tests * Build the rest (checkpoint) * Pass all but Prometheus tests * Precommit pass * Add aggregation.Kind argument to ExportKindFor * Remove Subtractor support * Remove dead test code * Restore the Subtractor code * Fix the tests * Comments * Add tests for MetricKind * Add ChangeSign test * Test ExportKind * New file * Rename ChangeSign * Remove a TODO, add a TODO * Remove Stateful remnants * Typo * Typo * Test an invalid export kind * Comments * Lint * Apply suggestions from code review Co-authored-by: Tyler Yahn <MrAlias@users.noreply.github.com> Co-authored-by: Tyler Yahn <MrAlias@users.noreply.github.com>
116 lines
3.3 KiB
Go
116 lines
3.3 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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//
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// Example application showcasing opentelemetry Go using the OTLP wire
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// protocol
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package main
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import (
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"context"
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"fmt"
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"log"
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"time"
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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/exporters/otlp"
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"go.opentelemetry.io/otel/sdk/metric/controller/push"
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"go.opentelemetry.io/otel/sdk/metric/selector/simple"
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sdktrace "go.opentelemetry.io/otel/sdk/trace"
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)
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// Initializes an OTLP exporter, and configures the corresponding trace and
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// metric providers.
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func initProvider() (*otlp.Exporter, *push.Controller) {
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exp, err := otlp.NewExporter(
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otlp.WithInsecure(),
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otlp.WithAddress("localhost:55680"),
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)
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handleErr(err, "Failed to create exporter: $v")
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traceProvider, err := sdktrace.NewProvider(
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sdktrace.WithConfig(sdktrace.Config{DefaultSampler: sdktrace.AlwaysSample()}),
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sdktrace.WithSyncer(exp),
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)
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handleErr(err, "Failed to create trace provider: %v")
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pusher := push.New(
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simple.NewWithExactDistribution(),
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exp,
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push.WithPeriod(2*time.Second),
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)
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global.SetTraceProvider(traceProvider)
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global.SetMeterProvider(pusher.Provider())
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pusher.Start()
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return exp, pusher
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}
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func main() {
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exp, pusher := initProvider()
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defer func() { handleErr(exp.Stop(), "Failed to stop exporter") }()
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defer pusher.Stop() // pushes any last exports to the receiver
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tracer := global.Tracer("mage-sense")
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meter := global.Meter("mage-read")
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// labels represent additional descriptors that can be bound to a metric
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// observer or recorder. In this case they describe the location in
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// which a spell scroll is scribed.
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commonLabels := []kv.KeyValue{
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kv.String("work-room", "East Scriptorium"),
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kv.String("occupancy", "69,105"),
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kv.String("priority", "Ultra"),
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}
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// Observer metric example
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oneMetricCB := func(_ context.Context, result metric.Float64ObserverResult) {
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result.Observe(1, commonLabels...)
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}
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_ = metric.Must(meter).NewFloat64ValueObserver("scrying.glass.one", oneMetricCB,
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metric.WithDescription("A ValueObserver set to 1.0"),
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)
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// Recorder metric example
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valuerecorder := metric.Must(meter).
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NewFloat64ValueRecorder("scrying.glass.two").
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Bind(commonLabels...)
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defer valuerecorder.Unbind()
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// work begins
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ctx, span := tracer.Start(context.Background(), "Archmage-Overlord-Inspection")
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for i := 0; i < 10; i++ {
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_, innerSpan := tracer.Start(ctx, fmt.Sprintf("Minion-%d", i))
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log.Println("Minions hard at work, scribing...")
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valuerecorder.Record(ctx, float64(i)*1.5)
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<-time.After(time.Second)
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innerSpan.End()
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}
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span.End()
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<-time.After(time.Second)
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log.Println("Spell-scroll scribed!")
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}
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func handleErr(err error, message string) {
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if err != nil {
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log.Fatalf("%s: %v", message, err)
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}
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}
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