How to delete data from Golang cache?

To delete data from the Go cache, there are two methods: use the Delete function to delete the data associated with it by providing the key. Use pipes to increase efficiency by executing multiple commands at once. The pipeline marks the data for deletion and actually performs the deletion in the background after submission.

#How to delete data in Go cache?

When developing Go applications, caching is a powerful tool that can improve the performance and responsiveness of your application. However, sometimes it is necessary to remove data from the cache to maintain data accuracy or to comply with specific requirements. This article will introduce two methods to delete data in Go cache.

Method 1: Use the Delete function

The most direct method is to use the Delete function. This function accepts a key as a parameter and removes the data associated with that key from the cache.

package main

import (
    "context"

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

func main() {
    rdb := redis.NewClient(&redis.Options{
        Addr: "localhost:6379",
    })

    ctx := context.Background()

    // 从缓存中删除 key 为 "mykey" 的数据
    if err := rdb.Del(ctx, "mykey").Err(); err != nil {
        panic(err)
    }
    // 打印操作成功的消息
    println("Data deleted successfully.")
}

Method 2: Using pipeline

Another way to delete data in the cache is to use a pipeline. Pipes allow you to execute multiple commands at once, increasing efficiency.

package main

import (
    "context"
    "time"

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

func main() {
    rdb := redis.NewClient(&redis.Options{
        Addr: "localhost:6379",
    })

    ctx := context.Background()

    pipe := rdb.Pipeline()

    // 未实际删除数据，仅标记为删除
    if err := pipe.Del(ctx, "mykey").Err(); err != nil {
        panic(err)
    }

    // 提交管道中的所有命令
    if _, err := pipe.Exec(ctx); err != nil {
        panic(err)
    }

    // 等待一段时间，让后台线程实际删除数据
    time.Sleep(1 * time.Second)
    // 打印操作成功的消息
    println("Data deleted successfully.")
}

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