在Go语言中基础的Redis操作

在Go语言中基础的Redis操作

需要先安装 redigo

go get "github.com/garyburd/redigo/redis"

Go语言Redis客户端的简单示例

连接池 POOL

为了和redis建立连接,需要创建一个redis.Pool的对象

func newPool() *redis.Pool {
    return &redis.Pool{
        MaxIdle:   10,
        MaxActive: 12000,
        Dial: func() (redis.Conn, error) {
            c, err := redis.Dial("tcp", ":6379")
            if err != nil {
                panic(err)
            }
            return c, err
        },
    }
}

测试连接 PING

如果想测试是否连接成功,可以使用 PING 命令

func ping(c redis.Conn) error {
    pong, err := c.Do("PING")
    if err != nil {
        return err
    }

    s, err := redis.String(pong, err)
    if err != nil {
        return err
    }
    fmt.Printf("PING Response = %s\n", s)
    return nil
}

SET

func set(c redis.Conn) error {
    _, err := c.Do("SET", "Favorite Movie", "Repo Man")
    if err != nil {
        return err
    }
    _, err = c.Do("SET", "Release Year", 1984)
    if err != nil {
        return err
    }
    return nil
}

GET

func get(c redis.Conn) error {
    key := "Favorite Movie"
    s, err := redis.String(c.Do("GET", key))
    if err != nil {
        return err
    }
    fmt.Printf("%s = %s\n", key, s)

    key = "Release Year"
    i, err := redis.Int(c.Do("GET", key))
    if err != nil {
        return err
    }
    fmt.Printf("%s = %d\n", key, i)

    key = "Nonexistent Key"
    s, err = redis.String(c.Do("GET", key))
    if err == redis.ErrNil {
        fmt.Printf("%s does not exist\n", key)
    } else if err != nil {
        return err
    } else {
        fmt.Printf("%s = %s\n", key, s)
    }
    return nil
}

SET STRUCT

func setStruct(c redis.Conn) error {
    const objectPrefix string = "user:"
    user := User{
        Username:  "coderminer.com",
        MobileID:  "12345678941",
        Email:     "kevin@163.com",
        FirstName: "coderminer.com",
        LastName:  "coderminer.com",
    }

    json, err := json.Marshal(user)
    if err != nil {
        return err
    }

    _, err = c.Do("SET", objectPrefix+user.Username, json)
    if err != nil {
        return err
    }
    return nil
}

GET STRUCT

func getStruct(c redis.Conn) error {
    const objectPrefix string = "user:"
    username := "coderminer.com"
    s, err := redis.String(c.Do("GET", objectPrefix+username))
    if err == redis.ErrNil {
        fmt.Println("User does not exist")
    } else if err != nil {
        return err
    }
    user := User{}
    err = json.Unmarshal([]byte(s), &user)
    fmt.Printf("%+v\n", user)
    return nil
}

最终的代码

package main

import (
    "encoding/json"
    "fmt"

    "github.com/garyburd/redigo/redis"
)

type User struct {
    Username  string
    MobileID  string
    Email     string
    FirstName string
    LastName  string
}

func newPool() *redis.Pool {
    return &redis.Pool{
        MaxIdle:   10,
        MaxActive: 12000,
        Dial: func() (redis.Conn, error) {
            c, err := redis.Dial("tcp", ":6379")
            if err != nil {
                panic(err)
            }
            return c, err
        },
    }
}

func ping(c redis.Conn) error {
    pong, err := c.Do("PING")
    if err != nil {
        return err
    }

    s, err := redis.String(pong, err)
    if err != nil {
        return err
    }
    fmt.Printf("PING Response = %s\n", s)
    return nil
}

func set(c redis.Conn) error {
    _, err := c.Do("SET", "Favorite Movie", "Repo Man")
    if err != nil {
        return err
    }
    _, err = c.Do("SET", "Release Year", 1984)
    if err != nil {
        return err
    }
    return nil
}

func get(c redis.Conn) error {
    key := "Favorite Movie"
    s, err := redis.String(c.Do("GET", key))
    if err != nil {
        return err
    }
    fmt.Printf("%s = %s\n", key, s)

    key = "Release Year"
    i, err := redis.Int(c.Do("GET", key))
    if err != nil {
        return err
    }
    fmt.Printf("%s = %d\n", key, i)

    key = "Nonexistent Key"
    s, err = redis.String(c.Do("GET", key))
    if err == redis.ErrNil {
        fmt.Printf("%s does not exist\n", key)
    } else if err != nil {
        return err
    } else {
        fmt.Printf("%s = %s\n", key, s)
    }
    return nil
}

func setStruct(c redis.Conn) error {
    const objectPrefix string = "user:"
    user := User{
        Username:  "coderminer.com",
        MobileID:  "12345678941",
        Email:     "kevin@163.com",
        FirstName: "coderminer.com",
        LastName:  "coderminer.com",
    }

    json, err := json.Marshal(user)
    if err != nil {
        return err
    }

    _, err = c.Do("SET", objectPrefix+user.Username, json)
    if err != nil {
        return err
    }
    return nil
}

func getStruct(c redis.Conn) error {
    const objectPrefix string = "user:"
    username := "coderminer.com"
    s, err := redis.String(c.Do("GET", objectPrefix+username))
    if err == redis.ErrNil {
        fmt.Println("User does not exist")
    } else if err != nil {
        return err
    }
    user := User{}
    err = json.Unmarshal([]byte(s), &user)
    fmt.Printf("%+v\n", user)
    return nil
}

func main() {
    pool := newPool()
    conn := pool.Get()
    defer conn.Close()

    err := ping(conn)
    if err != nil {
        fmt.Println(err)
    }

    err = set(conn)
    if err != nil {
        fmt.Println(err)
    }

    err = get(conn)
    if err != nil {
        fmt.Println(err)
    }

    err = setStruct(conn)
    if err != nil{
        fmt.Println(err)
    }

    err = getStruct(conn)
    if err != nil{
        fmt.Println(err)
    }
}

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