func()

in pkg/providers/gateway/gateway_udproute.go [82:183]
90 lines of code
12 McCabe index (conditional complexity)

func (c *gatewayUDPRouteController) sync(ctx context.Context, ev *types.Event) error {
	key := ev.Object.(string)
	namespace, name, err := cache.SplitMetaNamespaceKey(key)
	if err != nil {
		log.Errorw("found Gateway UDPRoute resource with invalid key",
			zap.Error(err),
			zap.String("key", key),
		)
		return err
	}

	log.Debugw("sync UDPRoute", zap.String("key", key))

	udpRoute, err := c.controller.gatewayUDPRouteLister.UDPRoutes(namespace).Get(name)
	if err != nil {
		if !k8serrors.IsNotFound(err) {
			log.Errorw("failed to get Gateway UDPRoute",
				zap.Error(err),
				zap.String("key", key),
			)
			return err
		}
		if ev.Type != types.EventDelete {
			log.Warnw("Gateway UDPRoute was deleted before process",
				zap.String("key", key),
			)
			// Don't need to retry.
			return nil
		}
	}

	if ev.Type == types.EventDelete {
		if udpRoute != nil {
			// We still find the resource while we are processing the DELETE event,
			// that means object with same namespace and name was created, discarding
			// this stale DELETE event.
			log.Warnw("discard the stale Gateway delete event since it exists",
				zap.String("key", key),
			)
			return nil
		}
		udpRoute = ev.Tombstone.(*gatewayv1alpha2.UDPRoute)
	}
	err = c.controller.validator.ValidateCommonRoute(udpRoute)
	if err != nil {
		log.Errorw("failed to validate gateway UDPRoute",
			zap.Error(err),
			zap.Any("object", udpRoute),
		)
		return err
	}
	tctx, err := c.controller.translator.TranslateGatewayUDPRouteV1Alpha2(udpRoute)
	if err != nil {
		log.Errorw("failed to translate gateway UDPRoute",
			zap.Error(err),
			zap.Any("object", udpRoute),
		)
		return err
	}

	log.Debugw("translated UDPRoute",
		zap.Any("streamroutes", tctx.StreamRoutes),
		zap.Any("upstreams", tctx.Upstreams),
	)
	m := &utils.Manifest{
		StreamRoutes: tctx.StreamRoutes,
		Upstreams:    tctx.Upstreams,
	}

	var (
		added   *utils.Manifest
		updated *utils.Manifest
		deleted *utils.Manifest
	)

	if ev.Type == types.EventDelete {
		deleted = m
	} else if ev.Type == types.EventAdd {
		added = m
	} else {
		var oldCtx *translation.TranslateContext
		oldObj := ev.OldObject.(*gatewayv1alpha2.UDPRoute)
		oldCtx, err = c.controller.translator.TranslateGatewayUDPRouteV1Alpha2(oldObj)
		if err != nil {
			log.Errorw("failed to translate old UDPRoute",
				zap.String("version", oldObj.APIVersion),
				zap.String("event_type", "update"),
				zap.Any("UDPRoute", oldObj),
				zap.Error(err),
			)
			return err
		}

		om := &utils.Manifest{
			Routes:    oldCtx.Routes,
			Upstreams: oldCtx.Upstreams,
		}
		added, updated, deleted = m.Diff(om)
	}

	return utils.SyncManifests(ctx, c.controller.APISIX, c.controller.APISIXClusterName, added, updated, deleted, false)
}