package main

import (
	"fmt"
	"github.com/garyburd/redigo/redis"
	"os"
	"runtime"
	"sync"
	"time"
)

func init() {
	runtime.GOMAXPROCS(runtime.NumCPU() - 1)
}

func main() {
	pool := &redis.Pool{
		MaxIdle:     3,
		IdleTimeout: 240 * time.Second,
		Dial: func() (redis.Conn, error) {
			c, err := redis.Dial("tcp", ":6379")
			if err != nil {
				return nil, err
			}

			_, err = c.Do("AUTH", "123456")
			if err != nil {
				return nil, err
			}

			return c, nil
		},
		TestOnBorrow: func(c redis.Conn, t time.Time) error {
			_, err := c.Do("PING")
			return err
		},
	}

	wg := sync.WaitGroup{}
	for {
		fmt.Println(pool.ActiveCount())
		time.Sleep(time.Second)

		for i := 0; i < 10; i++ {
			wg.Add(1)
			go func() {
				conn := pool.Get()
				if err := conn.Err(); err != nil {
					fmt.Fprintln(os.Stderr, "Get Conn: ", err)
					wg.Done()
					return
				}

				for {
					_, err := conn.Do("LPUSH", "testqueue", time.Now().Format("2006-01-02 15:04:05"))
					if err != nil {
						fmt.Fprintln(os.Stderr, "RPOP: ", err)
						wg.Done()
						break
					}
				}
			}()
		}

		for i := 0; i < 10; i++ {
			wg.Add(1)
			go func() {
				conn := pool.Get()
				defer conn.Close()
				if err := conn.Err(); err != nil {
					fmt.Fprintln(os.Stderr, "Get Conn: ", err)
					wg.Done()
					return
				}
				for {
					_, err := conn.Do("RPOP", "testqueue")
					if err == redis.ErrNil {
						time.Sleep(time.Second)
						continue
					}
					if err != nil {
						fmt.Fprintln(os.Stderr, "RPOP: ", err)
						wg.Done()
						break
					}
				}
			}()
		}

		wg.Wait()
		fmt.Fprintln(os.Stderr, "wait done")
	}
}