Detailed explanation of the steps to use the redis counter class

php中世界最好的语言
Release: 2023-03-26 18:52:02
Original
3302 people have browsed it

This time I will bring you a detailed explanation of the steps to use the redis counter class. What are the precautions when using the redis counter class? Here are practical cases, let’s take a look.

Redis is an open source log-type Key-Value database written in ANSI C language, supports network, can be memory-based and persistent, and provides APIs in multiple languages.

Here we use its incr(increment),get(get),delete(clear)methods to implement the counter class.

1.Redis counter class code and demonstration example

##RedisCounter.class.php

<?php
/**
 * PHP基于Redis计数器类
 * Date:  2017-10-28
 * Author: fdipzone
 * Version: 1.0
 *
 * Descripton:
 * php基于Redis实现自增计数,主要使用redis的incr方法,并发执行时保证计数自增唯一。
 *
 * Func:
 * public incr  执行自增计数并获取自增后的数值
 * public get   获取当前计数
 * public reset  重置计数
 * private connect 创建redis连接
 */
class RedisCounter{ // class start
  private $_config;
  private $_redis;
  /**
   * 初始化
   * @param Array $config redis连接设定
   */
  public function construct($config){
    $this->_config = $config;
    $this->_redis = $this->connect();
  }
  /**
   * 执行自增计数并获取自增后的数值
   * @param String $key 保存计数的键值
   * @param Int  $incr 自增数量,默认为1
   * @return Int
   */
  public function incr($key, $incr=1){
    return intval($this->_redis->incr($key, $incr));
  }
  /**
   * 获取当前计数
   * @param String $key 保存计数的健值
   * @return Int
   */
  public function get($key){
    return intval($this->_redis->get($key));
  }
  /**
   * 重置计数
   * @param String $key 保存计数的健值
   * @return Int
   */
  public function reset($key){
    return $this->_redis->delete($key);
  }
  /**
   * 创建redis连接
   * @return Link
   */
  private function connect(){
    try{
      $redis = new Redis();
      $redis->connect($this->_config['host'],$this->_config['port'],$this->_config['timeout'],$this->_config['reserved'],$this->_config['retry_interval']);
      if(empty($this->_config['auth'])){
        $redis->auth($this->_config['auth']);
      }
      $redis->select($this->_config['index']);
    }catch(RedisException $e){
      throw new Exception($e->getMessage());
      return false;
    }
    return $redis;
  }
} // class end
?>
Copy after login

demo.php

<?php
Require &#39;RedisCounter.class.php&#39;;
// redis连接设定
$config = array(
  &#39;host&#39; => 'localhost',
  'port' => 6379,
  'index' => 0,
  'auth' => '',
  'timeout' => 1,
  'reserved' => NULL,
  'retry_interval' => 100,
);
// 创建RedisCounter对象
$oRedisCounter = new RedisCounter($config);
// 定义保存计数的健值
$key = 'mycounter';
// 执行自增计数,获取当前计数,重置计数
echo $oRedisCounter->get($key).PHP_EOL; // 0
echo $oRedisCounter->incr($key).PHP_EOL; // 1
echo $oRedisCounter->incr($key, 10).PHP_EOL; // 11
echo $oRedisCounter->reset($key).PHP_EOL; // 1
echo $oRedisCounter->get($key).PHP_EOL; // 0
?>
Copy after login
Output:

0
1
11
1
0
Copy after login

2. Concurrent call counter, Check the uniqueness of the count

The test code is as follows:

<?php
Require &#39;RedisCounter.class.php&#39;;
// redis连接设定
$config = array(
  &#39;host&#39; => 'localhost',
  'port' => 6379,
  'index' => 0,
  'auth' => '',
  'timeout' => 1,
  'reserved' => NULL,
  'retry_interval' => 100,
);
// 创建RedisCounter对象
$oRedisCounter = new RedisCounter($config);
// 定义保存计数的健值
$key = 'mytestcounter';
// 执行自增计数并返回自增后的计数,记录入临时文件
file_put_contents('/tmp/mytest_result.log', $oRedisCounter->incr($key).PHP_EOL, FILE_APPEND);
?>
Copy after login
Test concurrent execution, we use the

ab tool to test, set execution150 times, 15 concurrency.

ab -c 15 -n 150 http://localhost/test.php
Copy after login

Execution result:

ab -c 15 -n 150 http://localhost/test.php
This is ApacheBench, Version 2.3 <$Revision: 1554214 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/
Benchmarking home.rabbit.km.com (be patient).....done
Server Software:    nginx/1.6.3
Server Hostname:    localhost
Server Port:      80
Document Path:     /test.php
Document Length:    0 bytes
Concurrency Level:   15
Time taken for tests:  0.173 seconds
Complete requests:   150
Failed requests:    0
Total transferred:   24150 bytes
HTML transferred:    0 bytes
Requests per second:  864.86 [#/sec] (mean)
Time per request:    17.344 [ms] (mean)
Time per request:    1.156 [ms] (mean, across all concurrent requests)
Transfer rate:     135.98 [Kbytes/sec] received
Connection Times (ms)
       min mean[+/-sd] median  max
Connect:    0  0  0.2   0    1
Processing:   3  16  3.2   16   23
Waiting:    3  16  3.2   16   23
Total:     4  16  3.1   17   23
Percentage of the requests served within a certain time (ms)
 50%   17
 66%   18
 75%   18
 80%   19
 90%   20
 95%   21
 98%   22
 99%   22
 100%   23 (longest request)
Copy after login

Check whether the count is unique

生成的总计数
wc -l /tmp/mytest_result.log
   150 /tmp/mytest_result.log
生成的唯一计数
sort -u /tmp/mytest_result.log | wc -l
   150
Copy after login
I believe you have mastered the method after reading the case in this article , for more exciting content, please pay attention to other related articles on the php Chinese website!

Recommended reading:

PHP’s RSA encryption, decryption and development interface case usage analysis

PHP implements multi-dimensional array sorting algorithm What are the ways

The above is the detailed content of Detailed explanation of the steps to use the redis counter class. For more information, please follow other related articles on the PHP Chinese website!

Related labels:
source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template
About us Disclaimer Sitemap
php.cn:Public welfare online PHP training,Help PHP learners grow quickly!