Golang Increment data to Redis

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英文:

Golang Increment data to Redis

问题

我一直在使用golang和redis进行尝试。我刚刚搭建了一个简单的HTTP服务器,并希望在redis上增加请求次数。我认为我正在创建过多的连接。我发现使用redigo可以使用连接池,但不确定在处理请求时如何实现连接池(在哪里实例化/调用连接池)。

错误:无法分配请求的地址。

如果有建议,将不胜感激...我确定我在错误地创建连接,但不确定如何更改。

编辑:根据pauljz的建议进行修改--现在运行得很好

var pool redis.Pool

func qryJson(rw http.ResponseWriter, req *http.Request){
    incrementRedis()
}

func incrementRedis () {
    t := time.Now().Format("2006-01-02 15:04:05")
    conn := pool.Get()
    defer conn.Close()
    if _, err := conn.Do("HINCRBY", "messages", t, 1); err != nil {
        log.Fatal(err)
    }
}

func main() {
    runtime.GOMAXPROCS(runtime.NumCPU())
    pool = redis.Pool{
        MaxIdle: 50,
        MaxActive: 500, // 最大连接数
        Dial: func() (redis.Conn, error) {
            c, err := redis.Dial("tcp", ":6379")
            if err != nil {
                panic(err.Error())
            }
            return c, err
        },
    } 
    http.HandleFunc("/testqry", qryJson)
    log.Fatal(http.ListenAndServe(":8082", nil))
}

以上是你提供的代码的翻译。

英文:

I have been playing around with golang and redis. I just stood up a simple http server and wanted to increment requests on redis. I am blowing up the connections (I think). I found that with redigo you can use connection pooling, but not sure how to implment that in go when I am serving the requests (where do you instantiate / call the pool from).

error: can't assign requested address.

Any suggestions would be appreciated....I am sure I am incorrectly making the connections, but just not sure how to change.

EDIT: Modified per pauljz's suggestions -- Works great now

    var pool redis.Pool

    func qryJson(rw http.ResponseWriter, req *http.Request){
    
    	incrementRedis()
    }
    
    func incrementRedis () {
    
	t := time.Now().Format("2006-01-02 15:04:05")
    conn := pool.Get()
    defer conn.Close()
    if _, err := conn.Do("HINCRBY", "messages", t, 1); err != nil {
        log.Fatal(err)
        
    }
    
    
    }
    
func main() {
	runtime.GOMAXPROCS(runtime.NumCPU())
	pool = redis.Pool{
	        MaxIdle: 50,
	        MaxActive: 500, // max number of connections
	        Dial: func() (redis.Conn, error) {
	                c, err := redis.Dial("tcp", ":6379")
	                if err != nil {
	                        panic(err.Error())
	                }
	                return c, err
	        },
	} 
    http.HandleFunc("/testqry", qryJson)
    log.Fatal(http.ListenAndServe(":8082", nil))
}

答案1

得分: 4

redigo文档中有一个关于连接池的很好的入门示例:http://godoc.org/github.com/garyburd/redigo/redis#Pool

在你的情况下,你的包中会有一个var pool redis.Pool(即不在函数内部)。

main()函数中,在你的ListenAndServe调用之前,你会调用redigo示例中的pool = redis.Pool{ ... }来初始化连接池。

incrementRedis()函数中,你可以这样做:

func incrementRedis() {
    conn := pool.Get()
    defer conn.Close()
    if _, err := conn.Do("HINCRBY", "messages", t, 1); err != nil {
        log.Fatal(err)
    }
}
英文:

The redigo docs have a good starter example for connection pooling: http://godoc.org/github.com/garyburd/redigo/redis#Pool

In your case you would have a var pool redis.Pool in your package (i.e. not inside of a function).

In main(), before your ListenAndServe call, you would call pool = redis.Pool{ ... } from the redigo example to initialize the pool.

In incrementRedis() you would then do something like:

func incrementRedis () {
    conn := pool.Get()
    defer conn.Close()
    if _, err := conn.Do("HINCRBY", "messages", t, 1); err != nil {
        log.Fatal(err)
    }
}

答案2

得分: 3

在你的代码中,你为每个HTTP请求创建了一个与Redis的连接。使用一个全局变量来存储已连接的Redis连接,并重复使用它。

英文:

In your code, you create a connection to redis for each http request. Use a global variable to store connected redis connection and reuse it.

huangapple
  • 本文由 发表于 2014年2月25日 12:50:14
  • 转载请务必保留本文链接:https://go.coder-hub.com/22004880.html
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