Record total tasks processed/failed

internal/base/base.go

@@ -39,6 +39,12 @@ const (
 	CancelChannel = "asynq:cancel"     // PubSub channel
 )
 
+// Max value for int64.
+//
+// Use this value to check if a redis counter value reached maximum.
+// As documeted in https://redis.io/commands/INCR, a string stored at a redis key is interpreted as a base-10 64 bit signed integer.
+const MaxInt64 = 1<<63 - 1
+
 // TaskState denotes the state of a task.
 type TaskState int
 
@@ -150,6 +156,16 @@ func PausedKey(qname string) string {
 	return fmt.Sprintf("%spaused", QueueKeyPrefix(qname))
 }
 
+// ProcessedTotalKey returns a redis key for total processed count for the given queue.
+func ProcessedTotalKey(qname string) string {
+	return fmt.Sprintf("%sprocessed", QueueKeyPrefix(qname))
+}
+
+// FailedTotalKey returns a redis key for total failure count for the given queue.
+func FailedTotalKey(qname string) string {
+	return fmt.Sprintf("%sfailed", QueueKeyPrefix(qname))
+}
+
 // ProcessedKey returns a redis key for processed count for the given day for the queue.
 func ProcessedKey(qname string, t time.Time) string {
 	return fmt.Sprintf("%sprocessed:%s", QueueKeyPrefix(qname), t.UTC().Format("2006-01-02"))

internal/base/base_test.go

@@ -173,6 +173,40 @@ func TestPausedKey(t *testing.T) {
 	}
 }
 
+func TestProcessedTotalKey(t *testing.T) {
+	tests := []struct {
+		qname string
+		want  string
+	}{
+		{"default", "asynq:{default}:processed"},
+		{"custom", "asynq:{custom}:processed"},
+	}
+
+	for _, tc := range tests {
+		got := ProcessedTotalKey(tc.qname)
+		if got != tc.want {
+			t.Errorf("ProcessedTotalKey(%q) = %q, want %q", tc.qname, got, tc.want)
+		}
+	}
+}
+
+func TestFailedTotalKey(t *testing.T) {
+	tests := []struct {
+		qname string
+		want  string
+	}{
+		{"default", "asynq:{default}:failed"},
+		{"custom", "asynq:{custom}:failed"},
+	}
+
+	for _, tc := range tests {
+		got := FailedTotalKey(tc.qname)
+		if got != tc.want {
+			t.Errorf("FailedTotalKey(%q) = %q, want %q", tc.qname, got, tc.want)
+		}
+	}
+}
+
 func TestProcessedKey(t *testing.T) {
 	tests := []struct {
 		qname string