hyperloglogredigoex.go

package main

import (
  "crypto/rand"
	hyperloglog "github.com/channelmeter/hyperloglog-redigo"
	hyperloglogEncoder "github.com/channelmeter/hyperloglog-redigo/encoder"
	"github.com/garyburd/redigo/redis"
	"io"
	"log"
	"time"
)

func randB() []byte {
	b := make([]byte, 512)
	n, err := io.ReadFull(rand.Reader, b)
	if n != len(b) || err != nil {
		panic(err)
		return nil
	}
	return b
}

func main() {

	c, err := redis.Dial("tcp", "localhost:6379")
	if err != nil {
		panic(err)
	}

	ctr := hyperloglog.CreateCounter(11)
	tctr := hyperloglog.CreateTimeSeriesCounter(11)

	ctr.SetEncoder(hyperloglogEncoder.SnappyEncoder())
	tctr.SetEncoder(hyperloglogEncoder.SnappyEncoder2x())
	c.Send("DEL", "test:gohll")

	for i := 0; i < 500; i++ {
		ctr.Add(c, "test:gohll", randB())
	}
	log.Printf("Values Added : %d", ctr.Count(c, "test:gohll"))

	c.Send("DEL", "test:gohll")
	lm := time.Unix(time.Now().Unix()-86400*30, 0)
	lw := time.Unix(time.Now().Unix()-86400*7, 0)
	mid := time.Unix(time.Now().Unix()-86400*14, 0)

	tctr.Add(c, "test:gohll", []byte("Hello World!"), mid)
	tctr.Add(c, "test:gohll", []byte("Hello World!"), mid)
	tctr.Add(c, "test:gohll", randB(), mid)
	tctr.Add(c, "test:gohll", randB(), mid)
	tctr.Add(c, "test:gohll", randB(), mid)
	tctr.Add(c, "test:gohll", randB(), mid)
	tctr.Add(c, "test:gohll", randB(), mid)
	tctr.Add(c, "test:gohll", randB(), mid)
	tctr.Add(c, "test:gohll", randB(), mid)
	tctr.Add(c, "test:gohll", randB(), mid)

	log.Printf("Values Added Within This Week : %d", tctr.Count(c, "test:gohll", lw))
	log.Printf("Values Added Within This Month: %d", tctr.Count(c, "test:gohll", lm))

}