How to use redigo in go redis

Installation

go-redis The third-party library encapsulates many functions for us to execute Redis commands, while the redigo third-party library only has one Do function to execute Redis commands, which is closer to using redis-cli to operate Redis.
go-redis supports connecting to Sentinel and cluster mode Redis

go get github.com/gomodule/redigo
go get github.com/go-redis/redis/v8

Linking Redis

func main() {
    c, err := redis.Dial("tcp", "localhost:6379")
    if err != nil {
        fmt.Println("conn redis failed,", err)
        return
    } 
    fmt.Println("redis conn success")
    defer c.Close()
}

String type operation

func main() {
    c, err := redis.Dial("tcp", "localhost:6379")
    if err != nil {
        fmt.Println("conn redis failed,", err)
        return
    }

    defer c.Close()
    _, err = c.Do("Set", "abc", 100)
    if err != nil {
        fmt.Println(err)
        return
    }

    r, err := redis.Int(c.Do("Get", "abc"))
    if err != nil {
        fmt.Println("get abc failed,", err)
        return
    }

    fmt.Println(r)
}

func main() {
    c, err := redis.Dial("tcp", "localhost:6379")
    if err != nil {
        fmt.Println("conn redis failed,", err)
        return
    }

    defer c.Close()
    _, err = c.Do("MSet", "abc", 100, "efg", 300)
    if err != nil {
        fmt.Println(err)
        return
    }

    r, err := redis.Ints(c.Do("MGet", "abc", "efg"))
    if err != nil {
        fmt.Println("get abc failed,", err)
        return
    }

    for _, v := range r {
        fmt.Println(v)
    }
}

Set expiration time

func main() {
    c, err := redis.Dial("tcp", "localhost:6379")
    if err != nil {
        fmt.Println("conn redis failed,", err)
        return
    }

    defer c.Close()
    _, err = c.Do("expire", "abc", 10)
    if err != nil {
        fmt.Println(err)
        return
    }
}
----------------------------
或者这样也行
do, err := client.Do("set", "name", "1111","EX",5)

List operation

func main() {
    c, err := redis.Dial("tcp", "localhost:6379")
    if err != nil {
        fmt.Println("conn redis failed,", err)
        return
    }

    defer c.Close()
    _, err = c.Do("lpush", "book_list", "abc", "ceg", 300)
    if err != nil {
        fmt.Println(err)
        return
    }

    r, err := redis.String(c.Do("lpop", "book_list"))
    if err != nil {
        fmt.Println("get abc failed,", err)
        return
    }

    fmt.Println(r)
}

Hash table

func main() {
    c, err := redis.Dial("tcp", "localhost:6379")
    if err != nil {
        fmt.Println("conn redis failed,", err)
        return
    }

    defer c.Close()
    _, err = c.Do("HSet", "books", "abc", 100)
    if err != nil {
        fmt.Println(err)
        return
    }

    r, err := redis.Int(c.Do("HGet", "books", "abc"))
    if err != nil {
        fmt.Println("get abc failed,", err)
        return
    }

    fmt.Println(r)
}

Redis connection pool

var pool *redis.Pool  //创建redis连接池

func init(){
    pool = &redis.Pool{     //实例化一个连接池
        MaxIdle:16,    //最初的连接数量
        // MaxActive:1000000,    //最大连接数量
        MaxActive:0,    //连接池最大连接数量,不确定可以用0（0表示自动定义），按需分配
        IdleTimeout:300,    //连接关闭时间 300秒 （300秒不使用自动关闭）    
        Dial: func() (redis.Conn ,error){     //要连接的redis数据库
            return redis.Dial("tcp","localhost:6379")
        },
    }
}

func main(){
    c := pool.Get() //从连接池，取一个链接
    defer c.Close() //函数运行结束 ，把连接放回连接池

        _,err := c.Do("Set","abc",200)
        if err != nil {
            fmt.Println(err)
            return
        }

        r,err := redis.Int(c.Do("Get","abc"))
        if err != nil {
            fmt.Println("get abc faild :",err)
            return
        }
        fmt.Println(r)
        pool.Close() //关闭连接池
}

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