Rename downstream router to receiver (#3068)

This was done previously but these were missed.

internal/daemon/controller/controller.go

@@ -50,14 +50,14 @@ import (
 	"google.golang.org/grpc"
 )
 
-// downstreamRouter defines a min interface which must be met by a
-// Controller.downstreamRoutes field
-type downstreamRouter interface {
-	// StartRouteMgmtTicking starts a ticker which manages the router's
+// downstreamReceiver defines a min interface which must be met by a
+// Controller.downstreamConns field
+type downstreamReceiver interface {
+	// StartConnectionMgmtTicking starts a ticker which manages the receiver's
 	// connections.
 	StartConnectionMgmtTicking(context.Context, func() string, int) error
 
-	// ProcessPendingConnections starts a function that continually processes
+	// StartProcessingPendingConnections starts a function that continually processes
 	// incoming client connections. This only returns when the provided context
 	// is done.
 	StartProcessingPendingConnections(context.Context, func() string) error
@@ -72,10 +72,10 @@ type downstreamWorkersTicker interface {
 }
 
 var (
-	downstreamRouterFactory func() downstreamRouter
+	downstreamReceiverFactory func() downstreamReceiver
 
 	downstreamersFactory           func(context.Context, string, string) (common.Downstreamers, error)
-	downstreamWorkersTickerFactory func(context.Context, string, string, common.Downstreamers, downstreamRouter) (downstreamWorkersTicker, error)
+	downstreamWorkersTickerFactory func(context.Context, string, string, common.Downstreamers, downstreamReceiver) (downstreamWorkersTicker, error)
 	commandClientFactory           func(context.Context, *Controller) error
 )
 
@@ -94,7 +94,7 @@ type Controller struct {
 
 	// downstream workers and routes to those workers
 	downstreamWorkers common.Downstreamers
-	downstreamRoutes  downstreamRouter
+	downstreamConns   downstreamReceiver
 
 	apiListeners    []*base.ServerListener
 	clusterListener *base.ServerListener
@@ -157,8 +157,8 @@ func New(ctx context.Context, conf *Config) (*Controller, error) {
 		livenessTimeToStale:     new(atomic.Int64),
 	}
 
-	if downstreamRouterFactory != nil {
-		c.downstreamRoutes = downstreamRouterFactory()
+	if downstreamReceiverFactory != nil {
+		c.downstreamConns = downstreamReceiverFactory()
 	}
 
 	c.started.Store(false)
@@ -454,7 +454,7 @@ func (c *Controller) Start() error {
 		return errors.Wrap(c.baseContext, err, op)
 	}
 
-	if c.downstreamRoutes != nil {
+	if c.downstreamConns != nil {
 		c.tickerWg.Add(2)
 
 		servNameFn := func() string {
@@ -467,11 +467,11 @@ func (c *Controller) Start() error {
 		}
 		go func() {
 			defer c.tickerWg.Done()
-			c.downstreamRoutes.StartProcessingPendingConnections(c.baseContext, servNameFn)
+			c.downstreamConns.StartProcessingPendingConnections(c.baseContext, servNameFn)
 		}()
 		go func() {
 			defer c.tickerWg.Done()
-			err := c.downstreamRoutes.StartConnectionMgmtTicking(
+			err := c.downstreamConns.StartConnectionMgmtTicking(
 				c.baseContext,
 				servNameFn,
 				-1,
@@ -485,7 +485,7 @@ func (c *Controller) Start() error {
 		// we'll use "root" to designate that this is the root of the graph (aka
 		// a controller)
 		boundVer := version.Get().VersionNumber()
-		dswTicker, err := downstreamWorkersTickerFactory(c.baseContext, "root", boundVer, c.downstreamWorkers, c.downstreamRoutes)
+		dswTicker, err := downstreamWorkersTickerFactory(c.baseContext, "root", boundVer, c.downstreamWorkers, c.downstreamConns)
 		if err != nil {
 			return fmt.Errorf("error creating downstream workers ticker: %w", err)
 		}

internal/daemon/controller/listeners.go

@@ -248,7 +248,7 @@ func (c *Controller) configureForCluster(ln *base.ServerListener) (func(), error
 
 	return func() {
 		err := handleSecondaryConnection(c.baseContext, metric.InstrumentClusterTrackingListener(multiplexingReverseGrpcListener, reverseGrpcListenerPurpose),
-			c.downstreamRoutes)
+			c.downstreamConns)
 		if err != nil {
 			event.WriteError(c.baseContext, op, err, event.WithInfoMsg("handleSecondaryConnection error"))
 		}