背景

    最近公司用户量上来了，因此，对考勤打卡的瓶颈也就越发明显。每到打卡高峰期，公司APP就打开很慢，甚至服务开挂。针对这些问题，检查服务器发现，原来是考勤接口并发上来不停请求数据库导致的CPU剧增。因此，升级了服务器，提升了配置，但是还是不能抗住压力。因此，自己百度发现redis是个好东西，可以做缓存数据库，缓解mysql压力。因此，写下这篇文章。

主要运用

-   1.redis:hset,del,hKeys...
-   2.定时任务
-   3.注意：设计时，是以每天为单位，异步同步redis缓存数据到mysql。

代码模块

• 1.redis基础封装

<?php
/*** Created by PhpStorm.* User: FengYun* Date: 2019/12/6* Time: 9:47*/namespace App\Services\Sign;use App\Services\ComService;
use Illuminate\Support\Facades\Config;
use Illuminate\Support\Facades\Redis;class RedisBaseService extends ComService
{private $config;private $redis;protected function __construct(){$this->redis = app('redis.connection');}private function _getEnable(){$conf = $this->config;return $conf['enable'];}/*** 查询key* @param $key* @return mixed*/public function keys($key){return $this->redis->keys($key);}/*** 设置位图* @param $key* @param $offset* @param  bool $value* @param int $time*/public function setBit($key, $offset,$value,$time=0){$result = $this->redis->setbit($key,$offset,$value);if($time>0){$this->redis->expire($key,$time);}return $result;}/*** 获取位图* @param $key* @param $offset* @return mixed*/public function getBit($key,$offset){return $this->redis->getBit($key,$offset);}/*** 统计位图* @param $key* @return mixed*/public function bitCount($key){if(!$this->_getEnable()){return null;}return $this->redis->bitCount($key);}/*** 位图操作* @param $operation* @param $reKey* @param array ...$key* @return mixed*/public function bitOp($operation,$reKey,...$key){if(!$this->_getEnable()){return null;}return $this->redis->bitOp($operation,$reKey,$key);}/*** 计算在某段位图中 1或0第一次出现的位置* @param $key* @param $bit 1/0* @param $start* @param null $end* @return mixed*/public function bitPos($key,$bit,$start,$end=null){if(!$this->_getEnable()){return null;}return $this->redis->bitPos($key,$bit,$start,$end);}/*** 删除位图* @param $key* @return mixed*/public function del($key){return $this->redis->del($key);}/*** 写入* @param $key* @param $hashKey* @param $value* @return bool*/public function hSet($key, $hashKey, $value ){return $this->redis->hset($key,$hashKey,$value);}/*** 批量获取* @param $key* @return bool*/public function hGetAll($key){return $this->redis->hGetAll($key);}/*** @param $key* @param $hashKey* @return bool*/public function hExists($key,$hashKey){return $this->redis->hExists($key,$hashKey);}/*** @param $key* @return bool*/public function hKeys($key){return $this->redis->hKeys($key);}/*** @param $key* @return bool*/public function hLen($key){return $this->redis->hLen($key);}/*** 管道技术批量入库* @param $key* @param $value*/public function setPipe($key,$value){$this->redis->multi();$this->redis->set('sign_'.$key,$value);$this->redis->get('sign_'.$key);$replies=$this->redis->exec();print_r($replies);}
}

• 2.打卡封装(根据需要而定，可省略)

<?php
/*** Created by PhpStorm.* User: FengYun* Date: 2019/12/6* Time: 10:13*/namespace App\Services\Sign;class RedisSignService extends RedisBaseService
{private $keySign= 'sign_';//签到记录keyprivate $key = 0;public function __construct($keySign){parent::__construct();//格式:前缀_2019_10_11:265|E234FD|20191206101112|1 =>1/0}}

• 3.打卡数据组装封装

<?php
/*** Created by PhpStorm.* User: Moer* Date: 2019/12/6* Time: 9:46*/namespace App\Services\Sign;class SignService
{public static function userSignIn($params){$sign_date = $params['sign_date'];$sign_time = $params['sign_time'];$company_id = $params['company_id'];$uuid = $params['uuid'];$sign_type = $params['sign_type'];$sign_date = date('Ymd',strtotime($sign_date));$keySign = 'sign_' . $sign_date .':'. $company_id .'|'. $uuid .'|'. date('YmhHis') .'|'. $sign_type;$signLogModel = new RedisSignService($keySign);try{/*格式:前缀_打卡日期:公司id|员工id|打卡时间|打卡方式sign_20191011:265|125043|20191206101112|1*/$key = 'sign_' . $sign_date ; //sign_20191011$hashKey = $uuid .'|'. date('His',strtotime($sign_time)); //125043|143705$value = $company_id . '|' . $uuid .'|'. date('H:i:s',strtotime($sign_time)) .'|' .$sign_type;//公司|用户uuid|打卡时间|打卡类型 265|125043|20191206101112|1//写入redis数据$res = $signLogModel->hSet($key,$hashKey,$value);if(!$res){return false;}}catch (\Exception $e){return ['msg'=>$e->getMessage(),'code'=> $e->getCode()];}}
}

• 4.模拟并发情况

<?phpnamespace App\Http\Controllers\Order;use App\Model\OrderSpikeModel;
use App\Services\Order\OrderService;
use App\Services\Sign\CronSignLogService;
use App\Services\Sign\SignService;
use Illuminate\Http\Request;
use App\Http\Controllers\Controller;
use Illuminate\Support\Facades\Redis;class OrderController extends Controller
{public function signIn(Request $request){$params['sign_date'] = date('Y-m-d',time());$params['sign_time'] = date('YmdHis',time());$params['company_id'] = rand(100,200);$params['uuid'] = '10000001';$params['sign_type'] = 1;
//        SignService::userSignIn($params);$start = microtime(true);for ($i=0;$i<10000;$i++){
//            sleep(1);$params['sign_date'] = date('Y-m-d',time());$params['sign_time'] = date('Y-m-d H:i:s',time());$params['company_id'] = rand(1,2000);$params['uuid'] = $i ;$params['sign_type'] = 1;try{SignService::userSignIn($params);}catch (\Exception $e){return ['msg'=>$e->getMessage(),'status'=>false];}}$end = microtime(true);echo '耗时'.round($end-$start,3)."秒<br/>";echo '内存(Now memory_get_usage): ' . memory_get_usage() . "<br />";return true;}
}

• 5.定时同步到mysql

<?php
/*** 定时任务入库* Created by PhpStorm.* User: FengYun* Date: 2019/12/6* Time: 10:50*/namespace App\Services\Sign;use App\Model\OrderSpikeModel;
use App\Services\ComService;class CronSignLogService extends ComService
{public function __construct(){}public static function addUserSignLogToMysql(){$data = [];//获取需要同步的日期或者年月日$day = '20191210';$sign_type = self::SIGN_TYPE_APP;//APP打开$uuid = 0;$company_id = 0;$signLogModel = new RedisSignService($uuid,$company_id,$day,$sign_type);//格式:前缀_20191209:192|10000001|20191201014803|1//$keys = $signLogModel->keys('sign_'. $day .':*');$sign_key = 'sign_'.$day;$keys = $signLogModel->hGetAll($sign_key);$today = date('Y-m-d',time()) .' ';foreach ($keys as $key){//公司|用户uuid|打卡时间|打卡类型$userArr = explode('|',$key);//获取用户信息 公司id，用户id，签到时间，签到类型$data[] = ['company_id'=> $userArr[0],'uuid'=> $userArr[1],'sign_time'=> $today . $userArr[2],'sign_type'=> $userArr[3],];}
//        var_dump($data);die;try{$is_success = false;if($data){//数据入库$insert_res = OrderSpikeModel::insert($data);//入库成功后,删除入库数据if($insert_res){$isExist = $signLogModel->hLen($sign_key);if($isExist > 0){$is_success = $signLogModel->del($sign_key);}}}return $is_success;}catch (\Exception $e){return ['msg'=> '操作入库失败,error:'. $e->getMessage(),'code'=> $e->getCode(),'status'=>false];}}
}注:定时同步redis数据到mysql数据库。这里同步数据时，可以采用队列异步同步到msyql，根据自己喜欢而定。

总结

高并发下缓存数据库不为是一个很好的抗压工具，建议多使用，切勿滥用！