private def loadRouteProviders()

in management/src/main/scala/org/apache/pekko/management/scaladsl/PekkoManagement.scala [243:301]
53 lines of code
16 McCabe index (conditional complexity)

  private def loadRouteProviders(): immutable.Seq[ManagementRouteProvider] = {
    val dynamicAccess = system.dynamicAccess

    // since often the providers are Pekko extensions, we initialize them here as the ActorSystem would otherwise
    settings.Http.RouteProviders.map {
      case NamedRouteProvider(name, fqcn) =>
        dynamicAccess
          .getObjectFor[ExtensionIdProvider](fqcn)
          .recoverWith {
            case _ => dynamicAccess.createInstanceFor[ExtensionIdProvider](fqcn, Nil)
          }
          .recoverWith[ExtensionIdProvider] {
            case _: ClassCastException | _: NoSuchMethodException =>
              dynamicAccess.createInstanceFor[ExtensionIdProvider](fqcn, (classOf[ExtendedActorSystem], system) :: Nil)
          }
          .recoverWith[AnyRef] {
            case _: ClassCastException | _: NoSuchMethodException =>
              dynamicAccess.createInstanceFor[ManagementRouteProvider](fqcn, Nil)
          }
          .recoverWith[AnyRef] {
            case _: ClassCastException | _: NoSuchMethodException =>
              dynamicAccess.createInstanceFor[ManagementRouteProvider](
                fqcn,
                (classOf[ExtendedActorSystem], system) :: Nil)
          }
          .recoverWith[AnyRef] {
            case _: ClassCastException | _: NoSuchMethodException =>
              dynamicAccess.createInstanceFor[javadsl.ManagementRouteProvider](fqcn, Nil)
          }
          .recoverWith[AnyRef] {
            case _: ClassCastException | _: NoSuchMethodException =>
              dynamicAccess
                .createInstanceFor[javadsl.ManagementRouteProvider](fqcn, (classOf[ExtendedActorSystem], system) :: Nil)
          } match {
          case Success(p: ExtensionIdProvider) =>
            system.registerExtension(p.lookup) match {
              case provider: ManagementRouteProvider         => provider
              case provider: javadsl.ManagementRouteProvider => new ManagementRouteProviderAdapter(provider)
              case other =>
                throw new RuntimeException(
                  s"Extension [$fqcn] should create a 'ManagementRouteProvider' but was " +
                  s"[${other.getClass.getName}]")
            }

          case Success(provider: ManagementRouteProvider) =>
            provider

          case Success(provider: javadsl.ManagementRouteProvider) =>
            new ManagementRouteProviderAdapter(provider)

          case Success(_) =>
            throw new RuntimeException(
              s"[$fqcn] is not an 'ExtensionIdProvider', 'ExtensionId' or 'ManagementRouteProvider'")

          case Failure(problem) =>
            throw new RuntimeException(s"While trying to load route provider extension [$name = $fqcn]", problem)
        }
    }
  }