reorganize exporters and simplify their use

pkg/fiber_tracing/fiber_tracing.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"log"
 
+	"git.ma-al.com/gora_filip/pkg/exporters"
 	"github.com/gofiber/fiber/v2"
 	fiberOpentelemetry "github.com/psmarcin/fiber-opentelemetry/pkg/fiber-otel"
 	"go.opentelemetry.io/otel"
@@ -20,10 +21,11 @@ var (
 )
 
 type Config struct {
-	AppName         string
-	Version         string
+	AppName string
+	Version string
+	// Name of an organization providing the service
 	ServiceProvider string
-	Exporter        trc.SpanExporter
+	Exporters       []exporters.ExporterWithConfig
 }
 
 func newResource(config Config) *resource.Resource {
@@ -39,7 +41,9 @@ func newResource(config Config) *resource.Resource {
 func NewMiddleware(config Config) func(*fiber.Ctx) error {
 	var tracerProviders []trc.TracerProviderOption
 
-	tracerProviders = append(tracerProviders, trc.WithBatcher(config.Exporter))
+	for _, exp := range config.Exporters {
+		tracerProviders = append(tracerProviders, exp.IntoTraceProviderOption())
+	}
 	tracerProviders = append(tracerProviders, trc.WithResource(newResource(config)))
 
 	TP = *trc.NewTracerProvider(tracerProviders...)