How to Implement Caching with Redis in Go

Implement Redis caching in Go by installing the go-redis client, creating a client instance, and using Set and Get methods to store and retrieve data.

package main

import (
	"context"
	"fmt"
	"log"
	"time"

	"github.com/redis/go-redis/v9"
)

func main() {
	ctx := context.Background()
	
	// 1. Create Redis client
	rdb := redis.NewClient(&redis.Options{
		Addr:     "localhost:6379",
		Password: "",
		DB:       0,
	})

	// 2. Set a key with expiration
	err := rdb.Set(ctx, "user:1", "Alice", 5*time.Minute).Err()
	if err != nil {
		log.Fatal(err)
	}

	// 3. Get the key
	val, err := rdb.Get(ctx, "user:1").Result()
	if err != nil {
		log.Fatal(err)
	}

	fmt.Println("user:1 is", val)
	
	// 4. Close client
	rdb.Close()
}

Install the library first: go get github.com/redis/go-redis/v9.

Redis caching stores frequently used data in fast memory instead of a slow database. This makes your application respond instantly to user requests by skipping the database lookup. Think of it like keeping your favorite tools on your desk instead of walking to the garage every time you need them.