Swoole在工作中的应用

众所周知，PHP的特点是开发效率高，适应当下多变的节奏，但是缺点也明显，就是不能常驻内存，跟数据库无法建立长连接，I/O开销和频繁实例化成为PHP性能的瓶颈。

Swoole是C语言编写的高性能网络通信引擎，诞生之初就是来解决PHP的性能问题，提供了异步多线程服务器，异步TCP/UDP网络客户端，异步MySQL，异步Redis，数据库连接池，AsyncTask，消息队列，毫秒定时器，异步文件读写，异步DNS查询。

Swoole
2.0版本增加了对协程（Coroutine）的支持，可以已同步的方式编写代码，底层自动进行协程调度，转变为异步IO。解决了传统异步编程嵌套回调的问题。

不过因为PHP默认在程序结束时销毁内存，一些扩展就没有清理，同时安装Swoole会导致内存泄漏和一些其他兼容性问题。

一 安装

下载源代码包，在虚拟机进入目录，执行命令进行编译和安装，注意要php-5.3.10以上版本。

wget https://github.com/swoole/swoole-src/archive/v4.5.2.tar.gz
tar -zxvf  swoole-src-4.5.2.tar.gz
cd swoole-src-4.5.2
phpize
./configure
make && make install
在/etc/php.d/新建文件swoole.ini，写入extension=swoole.so
重启apache

二 基类

<?php
namespace Kcloze\Jobs\Command;

use Symfony\Component\Console\Input\InputArgument;
use Kcloze\Jobs\Utils;
use Kcloze\Jobs\Process;

class AppCommand extends Command
{
    protected static $defaultName = 'app';

    public function __construct(array $config)
    {
        parent::__construct($config);
    }

    protected function configure()
    {
        $this->setDescription('manager swoole-jobs ');
        $this->addArgument('name', InputArgument::REQUIRED, 'Who do you want to start swoole-jobs?');
    }


    protected function start($work)
    {
        Utils::log(['subtype' => 'running','param'=>['work'=>$work], 'message' => 'swoole-jobs is starting...']);
        $this->output->writeln('swoole-jobs is starting...');
        $process = new Process($work);
        $process->start();
    }

    protected function restart($work)
    {
        Utils::log(['subtype' => 'running','param'=>['work'=>$work], 'message' => 'swoole-jobs is restarting...']);
        $this->output->writeln('swoole-jobs is restarting...');
        $this->stop($work);
        sleep(3);
        $this->start($work);
    }

    protected function stop($work)
    {
        Utils::log(['subtype' => 'running','param'=>['work'=>$work], 'message' => 'swoole-jobs is stopping...']);
        $this->output->writeln('swoole-jobs is stopping...');
        $this->sendSignal(SIGUSR1,$work);
    }

    protected function status($work)
    {
        $this->sendSignal(SIGUSR2,$work);
    }

    protected function exit($work)
    {
        Utils::log(['subtype' => 'running','param'=>['work'=>$work], 'message' => 'swoole-jobs is exiting...']);
        $this->output->writeln('swoole-jobs is exiting...');
        $this->sendSignal(SIGTERM,$work);

    }
}

三 使用

<?php
namespace Kcloze\Jobs\Jobs\coupon;
use lib\Log;
use bll\coupon\CouponBll;

class CouponDeal
{
    private static $bllObj;

    /**
     * 获取BLL对象单例
     * @param $bllName
     * @return object
     */
    private static function getInstance($bllName)
    {
        if(empty(self::$bllObj[$bllName]) || !(self::$bllObj[$bllName] instanceof $bllName))
        {
            self::$bllObj[$bllName] = new $bllName();
        }

        return self::$bllObj[$bllName];
    }

    /**
     * @brief 回调方法
     * @param $data 消息
     * @return mixed
     */
    public function dealCoupon($data)
    {
        $aRes = ['status'=>0];
        $oCouponBll = self::getInstance('bll\newbll\coupon\CouponBll');
        //TODO 处理优惠券,考虑后面会有多种类型的优惠券
        switch($data['type']){
            case '100':
                $aRes = $oCouponBll->dealAutoCoupon($data);
            break;   
        }
 
        //日志
        Log::info([
            'type' => 'coupon_deal',
            'call_file'     => __FILE__,
            'call_function' => __FUNCTION__,
            'param' => $data,
            'return' => $aRes,
            'message' => 'deal coupon'
        ]);

        $msg = 'consume auto coupon mq message fail';
        return $aRes;
    }
}

四 设置定时任务

. /etc/profile

umask 000

CURDIR=/www/lib/swoolejobs/bin
PHP=/usr/bin/php
cd $CURDIR
procNum=$(ps -ef | grep swoole-jobs.php | grep -v grep | wc -l)
if [ "$procNum" -lt "1" ];then
    if [ $1 == "check" ];then
        list="internal "
        for i in $list;
        do
            master_num=$(ps -aux | grep swoole-jobs_${i}_master| grep -v grep | wc -l)
            worker_num=$(ps -aux | grep swoole-jobs_${i}_worker| grep -v grep | wc -l)
            if [ $master_num -eq 0 ];then
                $PHP $CURDIR/swoole-jobs.php restart -w $i
                $PHP $CURDIR/swoole-jobs.php restartlog $i
            elif [ $worker_num -eq 0 ];then
                $PHP $CURDIR/swoole-jobs.php exit -w $i
                $PHP $CURDIR/swoole-jobs.php start -w $i
                $PHP $CURDIR/swoole-jobs.php restartlog $i
            fi
        done
    else
        $PHP $CURDIR/swoole-jobs.php $1 -w $2
    fi
fi

五 命令

在虚拟机开启：

sh swoolejobs.sh check

查看进程：

./swoolejobs.sh stop

停止进程：

ps axu | grep swoole

以上就是Swoole在工作中的应用。