exp/event

main.go

package main

import (
	"context"
	"os"
	"time"

	"golang.org/x/exp/event"
	"golang.org/x/exp/event/adapter/logfmt"
)

func main() {
	event.SetDefaultExporter(event.NewExporter(logfmt.NewHandler(os.Stdout), nil))
	ctx := context.Background()
	traced(ctx)
}

func traced(ctx context.Context) {
	ctx = event.Start(ctx, "traced", event.Bool("ok", true))
	defer event.End(ctx)
	time.Sleep(10 * time.Second)
}