Implement statistics collection

hub/hub.go

@@ -4,6 +4,7 @@ import (
 	"sync"
 	"time"
 
+	"github.com/KosyanMedia/burlesque/stats"
 	"github.com/KosyanMedia/burlesque/storage"
 )
 
@@ -12,6 +13,7 @@ type (
 		storage     *storage.Storage
 		subscribers []*Subscription
 		lock        sync.Mutex
+		statistics  *stats.Stats
 	}
 	Message struct {
 		Queue   string
@@ -27,6 +29,7 @@ func New(st *storage.Storage) *Hub {
 	h := &Hub{
 		storage:     st,
 		subscribers: []*Subscription{},
+		statistics:  stats.New(),
 	}
 
 	go h.cleanupEverySecond()
@@ -35,6 +38,8 @@ func New(st *storage.Storage) *Hub {
 }
 
 func (h *Hub) Pub(queue string, msg []byte) bool {
+	h.statistics.AddMessage(queue)
+
 	for _, s := range h.subscribers {
 		if ok := s.Need(queue); ok {
 			// Check if subscription is already served
@@ -45,6 +50,7 @@ func (h *Hub) Pub(queue string, msg []byte) bool {
 			}
 
 			if ok := s.Send(Message{queue, msg}); ok {
+				h.statistics.AddDelivery(queue)
 				return true
 			}
 		}
@@ -57,11 +63,13 @@ func (h *Hub) Pub(queue string, msg []byte) bool {
 
 func (h *Hub) Sub(s *Subscription) {
 	for _, queue := range s.Queues {
-		if msg, ok := h.storage.Get(queue, s.Done()); ok {
-			s.Send(Message{queue, msg})
+		if msg, okGot := h.storage.Get(queue, s.Done()); okGot {
+			if okSent := s.Send(Message{queue, msg}); okSent {
+				h.statistics.AddDelivery(queue)
 				return
 			}
 		}
+	}
 
 	h.subscribers = append(h.subscribers, s)
 }
@@ -82,9 +90,12 @@ func (h *Hub) Info() map[string]map[string]int64 {
 	info := make(map[string]map[string]int64)
 
 	for queue, size := range h.storage.QueueSizes() {
+		inRate, outRate := h.statistics.Rates(queue)
 		info[queue] = map[string]int64{
 			"messages":      size,
 			"subscriptions": 0,
+			"in_rate":       inRate,
+			"out_rate":      outRate,
 		}
 	}
 	for _, sub := range h.subscribers {
@@ -102,6 +113,15 @@ func (h *Hub) Info() map[string]map[string]int64 {
 	return info
 }
 
+func (h *Hub) RateHistory() map[string]map[string][]int64 {
+	hist := map[string]map[string][]int64{}
+	for queue, _ := range h.storage.QueueSizes() {
+		hist[queue] = h.statistics.RateHistory(queue)
+	}
+
+	return hist
+}
+
 func (h *Hub) StorageInfo() map[string]interface{} {
 	return h.storage.Info()
 }