function in main.go for elastic APM

main.go

func processingRequest(ctx context.Context) {
	span, ctx := apm.StartSpan(ctx, "processingRequest", "custom")
	defer span.End()

	doSomething(ctx)

	// time sleep simulate some processing time
	time.Sleep(15 * time.Millisecond)
	return
}

func doSomething(ctx context.Context) {
	span, ctx := apm.StartSpan(ctx, "doSomething", "custom")
	defer span.End()

	// time sleep simulate some processing time
	time.Sleep(20 * time.Millisecond)
	return
}

func getTodoFromAPI(ctx context.Context) (map[string]interface{}, error) {
	span, ctx := apm.StartSpan(ctx, "getTodoFromAPI", "custom")
	defer span.End()

	var result map[string]interface{}

	resp, err := http.Get("https://jsonplaceholder.typicode.com/todos/1")
	if err != nil {
		return result, err
	}

	defer resp.Body.Close()

	err = json.NewDecoder(resp.Body).Decode(&result)
	if err != nil {
		return result, err
	}

	return result, err
}