Add route update metrics tracking to PrefixHandler

- Add RecordIPv4Update and RecordIPv6Update to metrics package
- Add SetMetricsTracker method to PrefixHandler
- Track IPv4/IPv6 route updates when processing announcements
- Add GetMetricsTracker method to Streamer to expose metrics

internal/metrics/metrics.go

@@ -21,6 +21,10 @@ type Tracker struct {
 	byteCounter    metrics.Counter
 	messageRate    metrics.Meter
 	byteRate       metrics.Meter
+
+	// Route update metrics
+	ipv4UpdateRate metrics.Meter
+	ipv6UpdateRate metrics.Meter
 }
 
 // New creates a new metrics tracker
@@ -33,6 +37,8 @@ func New() *Tracker {
 		byteCounter:    metrics.NewCounter(),
 		messageRate:    metrics.NewMeter(),
 		byteRate:       metrics.NewMeter(),
+		ipv4UpdateRate: metrics.NewMeter(),
+		ipv6UpdateRate: metrics.NewMeter(),
 	}
 }
 
@@ -89,6 +95,24 @@ func (t *Tracker) GetStreamMetrics() StreamMetrics {
 	}
 }
 
+// RecordIPv4Update records an IPv4 route update
+func (t *Tracker) RecordIPv4Update() {
+	t.ipv4UpdateRate.Mark(1)
+}
+
+// RecordIPv6Update records an IPv6 route update
+func (t *Tracker) RecordIPv6Update() {
+	t.ipv6UpdateRate.Mark(1)
+}
+
+// GetRouteMetrics returns current route update metrics
+func (t *Tracker) GetRouteMetrics() RouteMetrics {
+	return RouteMetrics{
+		IPv4UpdatesPerSec: t.ipv4UpdateRate.Rate1(),
+		IPv6UpdatesPerSec: t.ipv6UpdateRate.Rate1(),
+	}
+}
+
 // StreamMetrics contains streaming statistics
 type StreamMetrics struct {
 	TotalMessages  uint64
@@ -98,3 +122,9 @@ type StreamMetrics struct {
 	MessagesPerSec float64
 	BitsPerSec     float64
 }
+
+// RouteMetrics contains route update statistics
+type RouteMetrics struct {
+	IPv4UpdatesPerSec float64
+	IPv6UpdatesPerSec float64
+}

internal/routewatch/app.go

@@ -118,6 +118,7 @@ func (rw *RouteWatch) Run(ctx context.Context) error {
 
 		// PrefixHandler maintains the prefixes and live_routes tables
 		rw.prefixHandler = NewPrefixHandler(rw.db, rw.logger)
+		rw.prefixHandler.SetMetricsTracker(rw.streamer.GetMetricsTracker())
 		rw.streamer.RegisterHandler(rw.prefixHandler)
 
 		// PeeringHandler maintains the asn_peerings table

internal/routewatch/prefixhandler.go

@@ -8,6 +8,7 @@ import (
 
 	"git.eeqj.de/sneak/routewatch/internal/database"
 	"git.eeqj.de/sneak/routewatch/internal/logger"
+	"git.eeqj.de/sneak/routewatch/internal/metrics"
 	"git.eeqj.de/sneak/routewatch/internal/ristypes"
 	"github.com/google/uuid"
 )
@@ -30,8 +31,9 @@ const (
 // PrefixHandler tracks BGP prefixes and maintains a live routing table in the database.
 // Routes are added on announcement and deleted on withdrawal.
 type PrefixHandler struct {
-	db     database.Store
-	logger *logger.Logger
+	db      database.Store
+	logger  *logger.Logger
+	metrics *metrics.Tracker
 
 	// Batching
 	mu        sync.Mutex
@@ -67,6 +69,11 @@ func NewPrefixHandler(db database.Store, logger *logger.Logger) *PrefixHandler {
 	return h
 }
 
+// SetMetricsTracker sets the metrics tracker for recording route updates
+func (h *PrefixHandler) SetMetricsTracker(metrics *metrics.Tracker) {
+	h.metrics = metrics
+}
+
 // WantsMessage returns true if this handler wants to process messages of the given type
 func (h *PrefixHandler) WantsMessage(messageType string) bool {
 	// We only care about UPDATE messages for the routing table
@@ -220,6 +227,15 @@ func (h *PrefixHandler) processAnnouncement(_ *database.Prefix, update prefixUpd
 		return
 	}
 
+	// Track route update metrics
+	if h.metrics != nil {
+		if ipVersion == ipv4Version {
+			h.metrics.RecordIPv4Update()
+		} else {
+			h.metrics.RecordIPv6Update()
+		}
+	}
+
 	// Create live route record
 	liveRoute := &database.LiveRoute{
 		ID:          uuid.New(),

internal/streamer/streamer.go

@@ -195,6 +195,11 @@ func (s *Streamer) GetMetrics() metrics.StreamMetrics {
 	return s.metrics.GetStreamMetrics()
 }
 
+// GetMetricsTracker returns the metrics tracker instance
+func (s *Streamer) GetMetricsTracker() *metrics.Tracker {
+	return s.metrics
+}
+
 // HandlerStats represents metrics for a single handler
 type HandlerStats struct {
 	Name           string