/
main.go
142 lines (115 loc) · 3.51 KB
/
main.go
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package main
import (
"context"
"log"
"os"
"os/signal"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/baggage"
"go.opentelemetry.io/otel/exporters/stdout"
"go.opentelemetry.io/otel/label"
"go.opentelemetry.io/otel/metric"
"go.opentelemetry.io/otel/propagation"
"go.opentelemetry.io/otel/sdk/metric/controller/push"
"go.opentelemetry.io/otel/sdk/metric/processor/basic"
"go.opentelemetry.io/otel/sdk/metric/selector/simple"
sdkTrace "go.opentelemetry.io/otel/sdk/trace"
"go.opentelemetry.io/otel/trace"
"github.com/covine/bifrost/broker"
)
func main() {
testOpenTelemetry()
config, err := broker.Configure(os.Args[1:])
if err != nil {
log.Fatal("configure broker config error: ", err)
}
b, err := broker.NewBroker(config)
if err != nil {
log.Fatal("New broker error: ", err)
}
err = b.Start()
if err != nil {
log.Fatal("broker start error: ", err)
}
s := onSignal()
log.Printf("signal received, broker closed: %v", s)
b.Close()
}
func onSignal() os.Signal {
sc := make(chan os.Signal, 1)
defer close(sc)
signal.Notify(sc, os.Kill, os.Interrupt)
s := <-sc
signal.Stop(sc)
return s
}
var (
fooKey = label.Key("ex.com/foo")
barKey = label.Key("ex.com/bar")
lemonsKey = label.Key("ex.com/lemons")
anotherKey = label.Key("ex.com/another")
)
func testOpenTelemetry() {
exporter, err := stdout.NewExporter([]stdout.Option{
stdout.WithQuantiles([]float64{0.5, 0.9, 0.99}),
stdout.WithPrettyPrint(),
}...)
if err != nil {
log.Fatalf("failed to initialize stdout export pipeline: %v", err)
}
bsp := sdkTrace.NewBatchSpanProcessor(exporter)
tp := sdkTrace.NewTracerProvider(sdkTrace.WithSpanProcessor(bsp))
defer func() { _ = tp.Shutdown(context.Background()) }()
pusher := push.New(
basic.New(
simple.NewWithExactDistribution(),
exporter,
),
exporter,
)
pusher.Start()
defer pusher.Stop()
otel.SetTracerProvider(tp)
otel.SetMeterProvider(pusher.MeterProvider())
// set global propagator to baggage (the default is no-op).
otel.SetTextMapPropagator(propagation.Baggage{})
tracer := otel.Tracer("ex.com/basic")
meter := otel.Meter("ex.com/basic")
commonLabels := []label.KeyValue{lemonsKey.Int(10), label.String("A", "1"), label.String("B", "2"), label.String("C", "3")}
oneMetricCB := func(_ context.Context, result metric.Float64ObserverResult) {
result.Observe(1, commonLabels...)
}
_ = metric.Must(meter).NewFloat64ValueObserver("ex.com.one", oneMetricCB,
metric.WithDescription("A ValueObserver set to 1.0"),
)
valuerecorderTwo := metric.Must(meter).NewFloat64ValueRecorder("ex.com.two")
ctx := context.Background()
ctx = baggage.ContextWithValues(ctx, fooKey.String("foo1"), barKey.String("bar1"))
valuerecorder := valuerecorderTwo.Bind(commonLabels...)
defer valuerecorder.Unbind()
err = func(ctx context.Context) error {
var span trace.Span
ctx, span = tracer.Start(ctx, "operation")
defer span.End()
span.AddEvent("Nice operation!", trace.WithAttributes(label.Int("bogons", 100)))
span.SetAttributes(anotherKey.String("yes"))
meter.RecordBatch(
// Note: call-site variables added as context Entries:
baggage.ContextWithValues(ctx, anotherKey.String("xyz")),
commonLabels,
valuerecorderTwo.Measurement(2.0),
)
return func(ctx context.Context) error {
var span trace.Span
ctx, span = tracer.Start(ctx, "Sub operation...")
defer span.End()
span.SetAttributes(lemonsKey.String("five"))
span.AddEvent("Sub span event")
valuerecorder.Record(ctx, 1.3)
return nil
}(ctx)
}(ctx)
if err != nil {
panic(err)
}
}