Use mixphp to create multi-process asynchronous email sending

// 入列
$redis->lpush($key, $data);
// 出列
$data = $redis->rpop($key);
// 阻塞出列
$data = $redis->brpop($key, 10);

composer require swiftmailer/swiftmailer

// 连接
$redis = new \Redis();
if (!$redis->connect('127.0.0.1', 6379)) {
    throw new \Exception('Redis Connect Failure');
}
$redis->auth('');
$redis->select(0);
// 投递任务
$data = [
    'to'      => ['***@qq.com' => 'A name'],
    'body'    => 'Here is the message itself',
    'subject' => 'The title content',
];
$redis->lpush('queue:email', serialize($data));

<?php

namespace apps\daemon\commands;

use mix\console\ExitCode;
use mix\facades\Input;
use mix\facades\Redis;
use mix\task\CenterProcess;
use mix\task\LeftProcess;
use mix\task\TaskExecutor;

/**
 * 推送模式范例
 * @author 刘健 <coder.liu@qq.com>
 */
class PushCommand extends BaseCommand
{

    // 配置信息
    const HOST = &#39;smtpdm.aliyun.com&#39;;
    const PORT = 465;
    const SECURITY = &#39;ssl&#39;;
    const USERNAME = &#39;****@email.***.com&#39;;
    const PASSWORD = &#39;****&#39;;

    // 初始化事件
    public function onInitialize()
    {
        parent::onInitialize(); // TODO: Change the autogenerated stub
        // 获取程序名称
        $this->programName = Input::getCommandName();
        // 设置pidfile
        $this->pidFile = "/var/run/{$this->programName}.pid";
    }

    /**
     * 获取服务
     * @return TaskExecutor
     */
    public function getTaskService()
    {
        return create_object(
            [
                // 类路径
                &#39;class&#39;         => &#39;mix\task\TaskExecutor&#39;,
                // 服务名称
                &#39;name&#39;          => "mix-daemon: {$this->programName}",
                // 执行类型
                &#39;type&#39;          => \mix\task\TaskExecutor::TYPE_DAEMON,
                // 执行模式
                &#39;mode&#39;          => \mix\task\TaskExecutor::MODE_PUSH,
                // 左进程数
                &#39;leftProcess&#39;   => 1,
                // 中进程数
                &#39;centerProcess&#39; => 5,
                // 任务超时时间 (秒)
                &#39;timeout&#39;       => 5,
            ]
        );
    }

    // 启动
    public function actionStart()
    {
        // 预处理
        if (!parent::actionStart()) {
            return ExitCode::UNSPECIFIED_ERROR;
        }
        // 启动服务
        $service = $this->getTaskService();
        $service->on(&#39;LeftStart&#39;, [$this, &#39;onLeftStart&#39;]);
        $service->on(&#39;CenterStart&#39;, [$this, &#39;onCenterStart&#39;]);
        $service->start();
        // 返回退出码
        return ExitCode::OK;
    }

    // 左进程启动事件回调函数
    public function onLeftStart(LeftProcess $worker)
    {
        try {
            // 模型内使用长连接版本的数据库组件，这样组件会自动帮你维护连接不断线
            $queueModel = Redis::getInstance();
            // 保持任务执行状态，循环结束后当前进程会退出，主进程会重启一个新进程继续执行任务，这样做是为了避免长时间执行内存溢出
            for ($j = 0; $j < 16000; $j++) {
                // 从消息队列中间件阻塞获取一条消息
                $data = $queueModel->brpop(&#39;queue:email&#39;, 10);
                if (empty($data)) {
                    continue;
                }
                list(, $data) = $data;
                // 将消息推送给中进程去处理，push有长度限制 (https://wiki.swoole.com/wiki/page/290.html)
                $worker->push($data, false);
            }
        } catch (\Exception $e) {
            // 休息一会，避免 CPU 出现 100%
            sleep(1);
            // 抛出错误
            throw $e;
        }
    }

    // 中进程启动事件回调函数
    public function onCenterStart(CenterProcess $worker)
    {
        // 保持任务执行状态，循环结束后当前进程会退出，主进程会重启一个新进程继续执行任务，这样做是为了避免长时间执行内存溢出
        for ($j = 0; $j < 16000; $j++) {
            // 从进程消息队列中抢占一条消息
            $data = $worker->pop();
            if (empty($data)) {
                continue;
            }
            // 处理消息
            try {
                // 处理消息，比如：发送短信、发送邮件、微信推送
                var_dump($data);
                $ret = self::sendEmail($data);
                var_dump($ret);
            } catch (\Exception $e) {
                // 回退数据到消息队列
                $worker->rollback($data);
                // 休息一会，避免 CPU 出现 100%
                sleep(1);
                // 抛出错误
                throw $e;
            }
        }
    }

    // 发送邮件
    public static function sendEmail($data)
    {
        // Create the Transport
        $transport = (new \Swift_SmtpTransport(self::HOST, self::PORT, self::SECURITY))
            ->setUsername(self::USERNAME)
            ->setPassword(self::PASSWORD);
        // Create the Mailer using your created Transport
        $mailer = new \Swift_Mailer($transport);
        // Create a message
        $message = (new \Swift_Message($data[&#39;subject&#39;]))
            ->setFrom([self::USERNAME => &#39;**网&#39;])
            ->setTo($data[&#39;to&#39;])
            ->setBody($data[&#39;body&#39;]);
        // Send the message
        $result = $mailer->send($message);
        return $result;
    }

}

[root@localhost bin]# ./mix-daemon push start
mix-daemon 'push' start successed.