Go操作redis与redigo的示例解析
作者:Jeff的技术栈
这篇文章主要为大家介绍了Go操作redis与redigo的示例解析,有需要的朋友可以借鉴参考下,希望能够有所帮助,祝大家多多进步早日升职加薪
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。
github地址:https://github.com/garyburd/redigo 目前已经迁移到:https://github.com/gomodule/redigo
文档:https://godoc.org/github.com/garyburd/redigo/redis
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)
管道操作可以理解为并发操作,并通过Send(),Flush(),Receive()三个方法实现。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) } }
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