func Poller(lock *sync.Mutex, ss *spacesaving.Rate, pc *pcap.Pcap) {
w := bufio.NewWriter(os.Stdout)
for _ = range time.Tick(3 * time.Second) {
stat, _ := pc.Getstats()
lock.Lock()
fmt.Fprintf(w, "\033c")
elements := ss.GetAll(time.Now())
for i, e := range elements {
fmt.Fprintf(w, "%60s\t%f\t%f\n", e.Key, e.LoRate, e.HiRate)
if i > 40 {
break
}
}
fmt.Fprintf(w, "\n")
fmt.Fprintf(w, "received:%v dropped:%v/%v (software/interface)\n",
stat.PacketsReceived, stat.PacketsDropped, stat.PacketsIfDropped)
w.Flush()
lock.Unlock()
}
}
func main() {
ss := spacesaving.Rate{}
slots, err := strconv.ParseInt(os.Args[1], 10, 64)
if err != nil {
panic(err)
}
ss.Init(uint32(slots), halfLife)
var lastTime time.Time
in := bufio.NewReader(os.Stdin)
for lineno := 1; true; lineno += 1 {
line, err := in.ReadString('\n')
if err == io.EOF {
break
}
if err != nil {
fmt.Fprintf(os.Stderr, "%s\n", err)
os.Exit(1)
}
line = strings.TrimSpace(line)
parts := strings.SplitN(line, ",", 2)
ts, err := time.Parse(TimeFormatString, parts[0])
if err != nil {
fmt.Fprintf(os.Stderr, "Ignoring line %d: %v\n",
lineno, err)
continue
}
key := strings.TrimSpace(parts[1])
ss.Touch(key, ts)
lastTime = ts
}
elements := ss.GetAll(lastTime)
for _, e := range elements {
fmt.Printf("%s, %f, %f\n", e.Key, e.LoRate, e.HiRate)
}
}