redis計數器類使用步驟詳解

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這次給大家帶來redis計數器類使用步驟詳解,redis計數器類使用的注意事項有哪些,下面就是實戰案例,一起來看一下。

Redis是一個開源的使用ANSI C語言編寫、支援網路、可基於記憶體亦可持久化的日誌型、Key-Value資料庫,並提供多種語言的API。

這裡使用其incr(自增),get(擷取),delete(清除)方法來實現計數器類。

1.Redis計數器類代碼及示範執行個體

RedisCounter.class.php

<?php/** * PHP基於Redis計數器類 * Date:  2017-10-28 * Author: fdipzone * Version: 1.0 * * Descripton: * php基於Redis實現自增計數,主要使用redis的incr方法,並發執行時保證計數自增唯一。 * * Func: * public incr  執行自增計數並擷取自增後的數值 * public get   擷取當前計數 * public reset  重設計數 * private connect 建立redis串連 */class RedisCounter{ // class start  private $_config;  private $_redis;  /**   * 初始化   * @param Array $config redis串連設定   */  public function construct($config){    $this->_config = $config;    $this->_redis = $this->connect();  }  /**   * 執行自增計數並擷取自增後的數值   * @param String $key 儲存計數的索引值   * @param Int  $incr 自增數量,預設為1   * @return Int   */  public function incr($key, $incr=1){    return intval($this->_redis->incr($key, $incr));  }  /**   * 擷取當前計數   * @param String $key 儲存計數的健值   * @return Int   */  public function get($key){    return intval($this->_redis->get($key));  }  /**   * 重設計數   * @param String $key 儲存計數的健值   * @return Int   */  public function reset($key){    return $this->_redis->delete($key);  }  /**   * 建立redis串連   * @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?>

demo.php

<?phpRequire 'RedisCounter.class.php';// redis串連設定$config = array(  'host' => 'localhost',  'port' => 6379,  'index' => 0,  'auth' => '',  'timeout' => 1,  'reserved' => NULL,  'retry_interval' => 100,);// 建立RedisCounter對象$oRedisCounter = new RedisCounter($config);// 定義儲存計數的健值$key = 'mycounter';// 執行自增計數,擷取當前計數,重設計數echo $oRedisCounter->get($key).PHP_EOL; // 0echo $oRedisCounter->incr($key).PHP_EOL; // 1echo $oRedisCounter->incr($key, 10).PHP_EOL; // 11echo $oRedisCounter->reset($key).PHP_EOL; // 1echo $oRedisCounter->get($key).PHP_EOL; // 0?>

輸出:

011110

2.並發調用計數器,檢查計數唯一性

測試代碼如下:

<?phpRequire 'RedisCounter.class.php';// redis串連設定$config = array(  'host' => 'localhost',  'port' => 6379,  'index' => 0,  'auth' => '',  'timeout' => 1,  'reserved' => NULL,  'retry_interval' => 100,);// 建立RedisCounter對象$oRedisCounter = new RedisCounter($config);// 定義儲存計數的健值$key = 'mytestcounter';// 執行自增計數並返回自增後的計數,記錄入臨時檔案file_put_contents('/tmp/mytest_result.log', $oRedisCounter->incr($key).PHP_EOL, FILE_APPEND);?>

測試並發執行,我們使用ab工具進行測試,設定執行150次,15個並發。

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

執行結果:

ab -c 15 -n 150 http://localhost/test.phpThis 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).....doneServer Software:    nginx/1.6.3Server Hostname:    localhostServer Port:      80Document Path:     /test.phpDocument Length:    0 bytesConcurrency Level:   15Time taken for tests:  0.173 secondsComplete requests:   150Failed requests:    0Total transferred:   24150 bytesHTML transferred:    0 bytesRequests 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] receivedConnection Times (ms)       min mean[+/-sd] median  maxConnect:    0  0  0.2   0    1Processing:   3  16  3.2   16   23Waiting:    3  16  3.2   16   23Total:     4  16  3.1   17   23Percentage 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)

檢查計數是否唯一

產生的總計數wc -l /tmp/mytest_result.log   150 /tmp/mytest_result.log產生的唯一計數sort -u /tmp/mytest_result.log | wc -l   150

相信看了本文案例你已經掌握了方法,更多精彩請關注php中文網其它相關文章!

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