Use Golang with Redis

,

1, Install Package:

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$ go get github.com/go-redis/redis/v8

2, Golang code with Get/Set/Exists example:

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package main

import (
    "context"
    "log"
    "time"

    "github.com/go-redis/redis/v8"
)

func main() {
    ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
    defer cancel()
    rcli := redis.NewClient(&redis.Options{
        Addr:     "localhost:6379",
        Password: "", // no password set
        DB:       3,  // use default DB
    })
    err := rcli.Ping(ctx).Err()
    if err != nil {
        log.Fatalf("Failed to connect to redis: %v\n", err)
    }

    // set
    err = rcli.Set(ctx, "name", "John Doe", 0).Err()
    if err != nil {
        log.Fatalf("Failed to call Set: %v\n", err)
    }

    // check exists
    exists, err := rcli.Exists(ctx, "name").Result()
    if err != nil {
        log.Printf("Failed to call Exists: %v\n", err)
    } else {
        if exists == 1 {
            log.Println("Key 'name' exists")
        } else {
            log.Println("Key 'name' doesn't exist")
        }
    }

    // get value
    val, err := rcli.Get(ctx, "name").Result()
    if err != nil {
        if err == redis.Nil {
            log.Println("Key 'name' doesn't exist")
        } else {
            log.Printf("Failed to call Get: %v\n", err)
        }
    } else {
        log.Printf("Value: %s\n", val)
    }

    // get list
    list, err := rcli.LRange(ctx, "scores", 0, -1).Result()
    if err != nil {
        log.Printf("Failed to call LRange: %v\n", err)
    } else {
        // list will be an empty list [] if key doesn't exist
        log.Printf("List: %v\n", list)
    }

    // push list
    err = rcli.LPush(ctx, "scores", 42).Err()
    if err != nil {
        log.Printf("Failed to call LPush: %v\n", err)
    }

    // get list again
    list, err = rcli.LRange(ctx, "scores", 0, -1).Result()
    // if the key doesn't exist, it will return an empty list
    if err != nil {
        log.Printf("Failed to call LRange: %v\n", err)
    } else {
        log.Printf("List: %v\n", list)
    }
}

Run it:

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$ go run main.go
2021/12/17 23:03:10 Key 'name' exists
2021/12/17 23:03:10 Value: John Doe
2021/12/17 23:03:10 List: []
2021/12/17 23:03:10 List: [42]