Go操作redis与redigo的方法
Go-操作redis
安装
golang操作redis的客户端包有多个比如redigo、go-redis，github上Star最多的莫属redigo。
go get github.com/garyburd/redigo/redis import "github.com/garyburd/redigo/redis"
连接
Conn接口是与Redis协作的主要接口，可以使用Dial,DialWithTimeout或者NewConn函数来创建连接，当任务完成时，应用程序必须调用Close函数来完成操作。
package main import ( "github.com/garyburd/redigo/redis" "fmt" ) func main() { conn,err := redis.Dial("tcp","10.1.210.69:6379") if err != nil { fmt.Println("connect redis error :",err) return } defer conn.Close() }
使用
package main import ( "github.com/garyburd/redigo/redis" "fmt" ) func main() { conn,err := redis.Dial("tcp","10.1.210.69:6379") if err != nil { fmt.Println("connect redis error :",err) return } defer conn.Close() _, err = conn.Do("SET", "name", "wd") if err != nil { fmt.Println("redis set error:", err) } name, err := redis.String(conn.Do("GET", "name")) if err != nil { fmt.Println("redis get error:", err) } else { fmt.Printf("Got name: %s \n", name) } }
设置key过期时间
_, err = conn.Do("expire", "name", 10) //10秒过期
if err != nil {
fmt.Println("set expire error: ", err)
return
}批量获取mget、批量设置mset
_, err = conn.Do("MSET", "name", "wd","age",22)
if err != nil {
fmt.Println("redis mset error:", err)
}
res, err := redis.Strings(conn.Do("MGET", "name","age"))
if err != nil {
fmt.Println("redis get error:", err)
} else {
res_type := reflect.TypeOf(res)
fmt.Printf("res type : %s \n", res_type)
fmt.Printf("MGET name: %s \n", res)
fmt.Println(len(res))
}
//结果：
//res type : []string
//MGET name: [wd 22]
//2列表操作
package main import ( "github.com/garyburd/redigo/redis" "fmt" "reflect" ) func main() { conn,err := redis.Dial("tcp","10.1.210.69:6379") if err != nil { fmt.Println("connect redis error :",err) return } defer conn.Close() _, err = conn.Do("LPUSH", "list1", "ele1","ele2","ele3") if err != nil { fmt.Println("redis mset error:", err) } res, err := redis.String(conn.Do("LPOP", "list1")) if err != nil { fmt.Println("redis POP error:", err) } else { res_type := reflect.TypeOf(res) fmt.Printf("res type : %s \n", res_type) fmt.Printf("res : %s \n", res) } } //res type : string //res : ele3
hash操作
package main import ( "github.com/garyburd/redigo/redis" "fmt" "reflect" ) func main() { conn,err := redis.Dial("tcp","10.1.210.69:6379") if err != nil { fmt.Println("connect redis error :",err) return } defer conn.Close() _, err = conn.Do("HSET", "student","name", "wd","age",22) if err != nil { fmt.Println("redis mset error:", err) } res, err := redis.Int64(conn.Do("HGET", "student","age")) if err != nil { fmt.Println("redis HGET error:", err) } else { res_type := reflect.TypeOf(res) fmt.Printf("res type : %s \n", res_type) fmt.Printf("res : %d \n", res) } } //res type : int64 //res : 22
Pipelining(管道)
通过使用Send()、Flush()和Receive()三个方法，可以以并发方式执行管道操作。客户端可以使用send()方法一次性向服务器发送一个或多个命令，命令发送完毕时，使用flush()方法将缓冲区的命令输入一次性发送到服务器，客户端再使用Receive()方法依次按照先进先出的顺序读取所有命令操作结果。
Send(commandName string, args ...interface{}) error
Flush() error
Receive() (reply interface{}, err error)Send：发送命令至缓冲区
Flush：清空缓冲区，将命令一次性发送至服务器
Recevie：依次读取服务器响应结果，当读取的命令未响应时，该操作会阻塞。
package main import ( "github.com/garyburd/redigo/redis" "fmt" ) func main() { conn,err := redis.Dial("tcp","10.1.210.69:6379") if err != nil { fmt.Println("connect redis error :",err) return } defer conn.Close() conn.Send("HSET", "student","name", "wd","age","22") conn.Send("HSET", "student","Score","100") conn.Send("HGET", "student","age") conn.Flush() res1, err := conn.Receive() fmt.Printf("Receive res1:%v \n", res1) res2, err := conn.Receive() fmt.Printf("Receive res2:%v\n",res2) res3, err := conn.Receive() fmt.Printf("Receive res3:%s\n",res3) } //Receive res1:0 //Receive res2:0 //Receive res3:22
redis发布会订阅模式
package main
import (
"github.com/garyburd/redigo/redis"
"fmt"
"time"
)
func Subs() { //订阅者
conn, err := redis.Dial("tcp", "10.1.210.69:6379")
if err != nil {
fmt.Println("connect redis error :", err)
return
}
defer conn.Close()
psc := redis.PubSubConn{conn}
psc.Subscribe("channel1") //订阅channel1频道
for {
switch v := psc.Receive().(type) {
case redis.Message:
fmt.Printf("%s: message: %s\n", v.Channel, v.Data)
case redis.Subscription:
fmt.Printf("%s: %s %d\n", v.Channel, v.Kind, v.Count)
case error:
fmt.Println(v)
return
}
}
}
func Push(message string) { //发布者
conn, _ := redis.Dial("tcp", "10.1.210.69:6379")
_,err1 := conn.Do("PUBLISH", "channel1", message)
if err1 != nil {
fmt.Println("pub err: ", err1)
return
}
}
func main() {
go Subs()
go Push("this is wd")
time.Sleep(time.Second*3)
}
//channel1: subscribe 1
//channel1: message: this is wd事务操作
MULTI, EXEC,DISCARD和WATCH是构成Redis事务的基础，当然我们使用go语言对redis进行事务操作的时候本质也是使用这些命令。
MULTI：开启事务
EXEC：执行事务
DISCARD：取消事务
WATCH：监视事务中的键变化，一旦有改变则取消事务。
示例：
package main import ( "github.com/garyburd/redigo/redis" "fmt" ) func main() { conn,err := redis.Dial("tcp","10.1.210.69:6379") if err != nil { fmt.Println("connect redis error :",err) return } defer conn.Close() conn.Send("MULTI") conn.Send("INCR", "foo") conn.Send("INCR", "bar") r, err := conn.Do("EXEC") fmt.Println(r) } //[1, 1]
万能操作
连接redis
conn,err := redis.Dial( "tcp", "10.0.3.100:6379", redis.DialPassword("EfcHGSzKqg6cfzWq"), redis.DialDatabase(8)) if err != nil { fmt.Println("connect redis error :",err) return } defer conn.Close()
写入
//写入
//_, err = conn.Do("LPUSH", "list1", "ele1","ele2","ele3")
_, err = conn.Do("reids写入方法", "key名字", "内容1","内容2","内容3")
if err != nil {
fmt.Println("redis set error:", err)
}读取
//读取 redis.Strings：返回多个 redis.String：返回一个 redis.int:返回统计的数字 //获取集合所有成员 //name, err := redis.Strings(conn.Do("smembers", "beautiful_user")) // 返回集合成员数 //name, err := redis.Int(conn.Do("scard", "beautiful_user")) name, err := redis.方法名(conn.Do("redis读取方法", "key名字")) if err != nil { fmt.Println("redis get error:", err) } else { fmt.Printf("Got name: %s \n", name) }
全部代码
package main import ( "fmt" "github.com/garyburd/redigo/redis" ) func main() { conn,err := redis.Dial("tcp","10.0.3.100:6379",redis.DialPassword("EfcHGSzKqg6cfzWq"),redis.DialDatabase(8)) if err != nil { fmt.Println("connect redis error :",err) return } defer conn.Close() //写入 _, err = conn.Do("LPUSH", "list1", "ele1","ele2","ele3") if err != nil { fmt.Println("redis set error:", err) } //读取 name, err := redis.Strings(conn.Do("smembers", "beautiful_user")) if err != nil { fmt.Println("redis get error:", err) } else { fmt.Printf("Got name: %s \n", name) } }