Update HistoricalStats method in RDB

internal/rdb/inspect.go

@@ -25,8 +25,7 @@ func (r *RDB) AllQueues() ([]string, error) {
 // Stats represents a state of queues at a certain time.
 type Stats struct {
 	// Name of the queue (e.g. "default", "critical").
-	// Note: It doesn't include the prefix "asynq:queues:".
-	Name string
+	Queue string
 	// Paused indicates whether the queue is paused.
 	// If true, tasks in the queue should not be processed.
 	Paused bool
@@ -47,9 +46,15 @@ type Stats struct {
 
 // DailyStats holds aggregate data for a given day.
 type DailyStats struct {
+	// Name of the queue (e.g. "default", "critical").
+	Queue string
+	// Total number of tasks processed during the given day.
+	// The number includes both succeeded and failed tasks.
 	Processed int
-	Failed    int
-	Time      time.Time
+	// Total number of tasks failed during the given day.
+	Failed int
+	// Date this stats was taken.
+	Time time.Time
 }
 
 var ErrQueueNotFound = errors.New("rdb: queue does not exist")
@@ -120,7 +125,7 @@ func (r *RDB) CurrentStats(qname string) (*Stats, error) {
 		return nil, err
 	}
 	stats := &Stats{
-		Name:      qname,
+		Queue:     qname,
 		Timestamp: now,
 	}
 	for i := 0; i < len(data); i += 2 {
@@ -157,14 +162,14 @@ local res = {}
 for _, key in ipairs(KEYS) do
 	local n = redis.call("GET", key)
 	if not n then
-	n = 0
+		n = 0
 	end
 	table.insert(res, tonumber(n))
 end
 return res`)
 
-// HistoricalStats returns a list of stats from the last n days.
-func (r *RDB) HistoricalStats(n int) ([]*DailyStats, error) {
+// HistoricalStats returns a list of stats from the last n days for the given queue.
+func (r *RDB) HistoricalStats(qname string, n int) ([]*DailyStats, error) {
 	if n < 1 {
 		return []*DailyStats{}, nil
 	}
@@ -175,10 +180,10 @@ func (r *RDB) HistoricalStats(n int) ([]*DailyStats, error) {
 	for i := 0; i < n; i++ {
 		ts := now.Add(-time.Duration(i) * day)
 		days = append(days, ts)
-		keys = append(keys, base.ProcessedKey(ts))
-		keys = append(keys, base.FailureKey(ts))
+		keys = append(keys, base.ProcessedKey(qname, ts))
+		keys = append(keys, base.FailureKey(qname, ts))
 	}
-	res, err := historicalStatsCmd.Run(r.client, keys, len(keys)).Result()
+	res, err := historicalStatsCmd.Run(r.client, keys).Result()
 	if err != nil {
 		return nil, err
 	}
@@ -189,6 +194,7 @@ func (r *RDB) HistoricalStats(n int) ([]*DailyStats, error) {
 	var stats []*DailyStats
 	for i := 0; i < len(data); i += 2 {
 		stats = append(stats, &DailyStats{
+			Queue:     qname,
 			Processed: data[i],
 			Failed:    data[i+1],
 			Time:      days[i/2],

internal/rdb/inspect_test.go

@@ -108,7 +108,7 @@ func TestCurrentStats(t *testing.T) {
 			paused: []string{},
 			qname:  "default",
 			want: &Stats{
-				Name:       "default",
+				Queue:      "default",
 				Paused:     false,
 				Enqueued:   1,
 				InProgress: 1,
@@ -162,7 +162,7 @@ func TestCurrentStats(t *testing.T) {
 			paused: []string{"critical", "low"},
 			qname:  "critical",
 			want: &Stats{
-				Name:       "critical",
+				Queue:      "critical",
 				Paused:     true,
 				Enqueued:   1,
 				InProgress: 0,
@@ -225,11 +225,12 @@ func TestHistoricalStats(t *testing.T) {
 	now := time.Now().UTC()
 
 	tests := []struct {
-		n int // number of days
+		qname     // queue of interest
+		n     int // number of days
 	}{
-		{90},
-		{7},
-		{0},
+		{"default", 90},
+		{"custom", 7},
+		{"default", 0},
 	}
 
 	for _, tc := range tests {
@@ -238,31 +239,32 @@ func TestHistoricalStats(t *testing.T) {
 		// populate last n days data
 		for i := 0; i < tc.n; i++ {
 			ts := now.Add(-time.Duration(i) * 24 * time.Hour)
-			processedKey := base.ProcessedKey(ts)
-			failedKey := base.FailureKey(ts)
+			processedKey := base.ProcessedKey(tc.qname, ts)
+			failedKey := base.FailureKey(tc.qname, ts)
 			r.client.Set(processedKey, (i+1)*1000, 0)
 			r.client.Set(failedKey, (i+1)*10, 0)
 		}
 
-		got, err := r.HistoricalStats(tc.n)
+		got, err := r.HistoricalStats(tc.qname, tc.n)
 		if err != nil {
-			t.Errorf("RDB.HistoricalStats(%v) returned error: %v", tc.n, err)
+			t.Errorf("RDB.HistoricalStats(%q, %d) returned error: %v", tc.qname, tc.n, err)
 			continue
 		}
 
 		if len(got) != tc.n {
-			t.Errorf("RDB.HistorycalStats(%v) returned %d daily stats, want %d", tc.n, len(got), tc.n)
+			t.Errorf("RDB.HistorycalStats(%q, %d) returned %d daily stats, want %d", tc.qname, tc.n, len(got), tc.n)
 			continue
 		}
 
 		for i := 0; i < tc.n; i++ {
 			want := &DailyStats{
+				Queue:     tc.qname,
 				Processed: (i + 1) * 1000,
 				Failed:    (i + 1) * 10,
 				Time:      now.Add(-time.Duration(i) * 24 * time.Hour),
 			}
 			if diff := cmp.Diff(want, got[i], timeCmpOpt); diff != "" {
-				t.Errorf("RDB.HistoricalStats %d days ago data; got %+v, want %+v; (-want,+got):\n%s", i, got[i], want, diff)
+				t.Errorf("RDB.HistoricalStats for the last %d days; got %+v, want %+v; (-want,+got):\n%s", i, got[i], want, diff)
 			}
 		}
 	}