小編給大家分享一下php基于redis計(jì)數(shù)器類的示例分析,相信大部分人都還不怎么了解,因此分享這篇文章給大家參考一下,希望大家閱讀完這篇文章后大有收獲,下面讓我們一起去了解一下吧!
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Redis是一個開源的使用ANSI C語言編寫、支持網(wǎng)絡(luò)、可基于內(nèi)存亦可持久化的日志型、Key-Value數(shù)據(jù)庫,并提供多種語言的API。
本文將使用其incr(自增),get(獲取),delete(清除)方法來實(shí)現(xiàn)計(jì)數(shù)器類。
RedisCounter.class.php
<?php/** * PHP基于Redis計(jì)數(shù)器類 * Date: 2017-10-28 * Author: fdipzone * Version: 1.0 * * Descripton: * php基于Redis實(shí)現(xiàn)自增計(jì)數(shù),主要使用redis的incr方法,并發(fā)執(zhí)行時保證計(jì)數(shù)自增唯一。 * * Func: * public incr 執(zhí)行自增計(jì)數(shù)并獲取自增后的數(shù)值 * public get 獲取當(dāng)前計(jì)數(shù) * public reset 重置計(jì)數(shù) * private connect 創(chuàng)建redis連接 */class RedisCounter{ // class start private $_config; private $_redis; /** * 初始化 * @param Array $config redis連接設(shè)定 */ public function __construct($config){ $this->_config = $config; $this->_redis = $this->connect(); } /** * 執(zhí)行自增計(jì)數(shù)并獲取自增后的數(shù)值 * @param String $key 保存計(jì)數(shù)的鍵值 * @param Int $incr 自增數(shù)量,默認(rèn)為1 * @return Int */ public function incr($key, $incr=1){ return intval($this->_redis->incr($key, $incr)); } /** * 獲取當(dāng)前計(jì)數(shù) * @param String $key 保存計(jì)數(shù)的健值 * @return Int */ public function get($key){ return intval($this->_redis->get($key)); } /** * 重置計(jì)數(shù) * @param String $key 保存計(jì)數(shù)的健值 * @return Int */ public function reset($key){ return $this->_redis->delete($key); } /** * 創(chuàng)建redis連接 * @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?>
demo.php
<?php Require 'RedisCounter.class.php'; // redis連接設(shè)定 $config = array( 'host' => 'localhost', 'port' => 6379, 'index' => 0, 'auth' => '', 'timeout' => 1, 'reserved' => NULL, 'retry_interval' => 100, ); // 創(chuàng)建RedisCounter對象 $oRedisCounter = new RedisCounter($config); // 定義保存計(jì)數(shù)的健值 $key = 'mycounter'; // 執(zhí)行自增計(jì)數(shù),獲取當(dāng)前計(jì)數(shù),重置計(jì)數(shù) 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 ?>
輸出:
0 1 11 1 0
2.并發(fā)調(diào)用計(jì)數(shù)器,檢查計(jì)數(shù)唯一性
測試代碼如下:
<?php Require 'RedisCounter.class.php'; // redis連接設(shè)定 $config = array( 'host' => 'localhost', 'port' => 6379, 'index' => 0, 'auth' => '', 'timeout' => 1, 'reserved' => NULL, 'retry_interval' => 100, ); // 創(chuàng)建RedisCounter對象 $oRedisCounter = new RedisCounter($config); // 定義保存計(jì)數(shù)的健值 $key = 'mytestcounter'; // 執(zhí)行自增計(jì)數(shù)并返回自增后的計(jì)數(shù),記錄入臨時文件 file_put_contents('/tmp/mytest_result.log', $oRedisCounter->incr($key).PHP_EOL, FILE_APPEND); ?>
測試并發(fā)執(zhí)行,我們使用ab工具進(jìn)行測試,設(shè)置執(zhí)行150次,15個并發(fā)。
ab -c 15 -n 150 http://localhost/test.php
執(zhí)行結(jié)果:
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)
檢查計(jì)數(shù)是否唯一
生成的總計(jì)數(shù) wc -l /tmp/mytest_result.log 150 /tmp/mytest_result.log生成的唯一計(jì)數(shù) sort -u /tmp/mytest_result.log | wc -l 150
可以看到在并發(fā)調(diào)用的情況下,生成的計(jì)數(shù)也保證唯一。
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分享名稱:php基于redis計(jì)數(shù)器類的示例分析
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