使用go操作redis的有序集合(zset)

我就废话不多说了，大家还是直接看代码吧~

package main
import (
 "fmt"
 "github.com/garyburd/redigo/redis"
)
func main() {
 // 连接redis数据库,指定数据库的ip和端口
 conn, err := redis.dial("tcp", "36.99.16.197:6379")
 if err != nil {
 fmt.println("connect to redis error", err)
 return
 } else {
 fmt.println("connect to redis ok.")
 }
 // 函数退出时关闭连接
 defer conn.close()
 // 执行一个有序zset插入
 _, err = conn.do("zadd", "mykey", "incr", 1, "robot1")
 if err != nil {
 fmt.println("redis set failed:", err)
 }
 // 再执行一个有序zset插入
 _, err = conn.do("zadd", "mykey", "incr", 1, "robot2")
 if err != nil {
 fmt.println("redis set failed:", err)
 }
 // 读取指定zset
 user_map, err := redis.stringmap(conn.do("zrange", "mykey", 0, 10, "withscores"))
 if err != nil {
 fmt.println("redis get failed:", err)
 } else {
 fmt.printf("get mykey: %v \n", user_map)
 }
 for user := range user_map {
 fmt.printf("user name: %v %v\n", user, user_map[user])
 }
}

输出：

connect to redis ok.
get mykey: map[robot1:1 robot2:1]
user name: robot1 1
user name: robot2 1

补充：redis中zset的golang实现

zset

初衷是在不用redis的前提下实现排行榜

项目地址

installation

go get -u github.com/liyiheng/zset

usage

removed rwlock in the sortedset.

just implement it yourself if you need.

s := zset.new()
// add data
s.set(66, 1001, "test1")
s.set(77, 1002, "test2")
s.set(88, 1003, "test3")
s.set(100, 1004, "liyiheng")
s.set(99, 1005, "test4")
s.set(44, 1006, "test5")
// update data
s.set(44, 1001, "test1")
// get rank by id
rank, score, extra := s.getrank(1004, false)
// get data by rank
id, score, extra := s.getdatabyrank(0, true)
// get data by id
dat, ok := s.getdata(1001)
// delete data by id
s.delete(1001)

benchmark

go test -test.bench=".*"
benchmarksortedset_add-4   1000000  4121 ns/op
benchmarksortedset_getrank-4  500000  3592 ns/op
benchmarksortedset_getdatabyrank-4 2000000  667 ns/op
pass
ok zset 11.365s

以上为个人经验，希望能给大家一个参考，也希望大家多多支持。如有错误或未考虑完全的地方，望不吝赐教。