observer/example/main.go

package main

import (
	"context"
	"fmt"
	"log"
	"os"
	"os/signal"
	"time"

	"git.ma-al.com/gora_filip/observer/pkg/tracer"
	"git.ma-al.com/gora_filip/pkg/attr/layer_attr"
	"git.ma-al.com/gora_filip/pkg/exporters"
	tracing "git.ma-al.com/gora_filip/pkg/fiber_tracing"
	"git.ma-al.com/gora_filip/pkg/level"
	"github.com/gofiber/fiber/v2"
)

func main() {

	main := fiber.New(fiber.Config{
		StreamRequestBody: true,
	})

	exps := make([]exporters.TraceExporter, 0)
	exps = append(exps, exporters.DevConsoleExporter())
	gelfExp, err := exporters.GelfExporter()
	if err == nil {
		exps = append(exps, gelfExp)
	}
	jaegerExp, err := exporters.OtlpHTTPExporter()
	if err == nil {
		exps = append(exps, jaegerExp)
	}

	main.Use(tracing.NewMiddleware(tracing.Config{
		AppName:         "example",
		Version:         "0.0.0",
		ServiceProvider: "maal",
		Exporters:       exps,
	}))
	defer tracing.ShutdownTracer()

	main.Get("/", func(c *fiber.Ctx) error {
		ctx, span := tracing.FStart(c, layer_attr.Handler{
			Level: level.DEBUG,
		}.AsOpts())
		defer span.End()

		span.AddEvent(
			"smthing is happening",
			layer_attr.Handler{
				Level: level.INFO,
			}.AsOpts(),
		)

		err := Serv(ctx)
		if err != nil {
			return tracer.RecordError(span, err)
		}

		return c.SendString("xd")
	})

	// handle interrupts (shutdown)
	c := make(chan os.Signal, 1)
	signal.Notify(c, os.Interrupt)
	go func() {
		oscall := <-c
		log.Printf("system call: %+v", oscall)
		main.Shutdown()
	}()
	if err := main.Listen(fmt.Sprintf(":%d", 3344)); err != nil {
		log.Panic(err)
	}
	fmt.Println("Shutting down...")

}

func Serv(ctx context.Context) *fiber.Error {
	ctx, span := tracer.Service(ctx, "service", "service span")
	defer span.End()

	for range []int{1, 2, 3} {
		time.Sleep(time.Millisecond * 100)
	}

	err := Repo(ctx)
	if err != nil {
		return fiber.NewError(500, "xd")
	}

	return fiber.NewError(500, "x")
}

func Repo(ctx context.Context) error {
	ctx, span := tracer.Repository(ctx, "repo", "repo span")
	defer span.End()

	for range []int{1, 2, 3} {
		time.Sleep(time.Millisecond * 100)
	}

	return nil
}