laravel如何让函数在后台运行

How to make function run in background in laravel(laravel如何让函数在后台运行)

问题描述

我正在使用 Laravel 5.0 开发一个网站并托管在 Windows Server2012 中.

I am developing a website in Laravel 5.0 and hosted in Windows Server2012.

我遇到了一个问题，即我正在从另一个函数 A 调用控制器中的函数 B 并且我希望调用另一个函数 B 的函数 A 不等待函数 B 的完成.并且函数 B 在后台完成并独立形成页面的用户终止和函数 A 返回.

I am stuck at a problem which is I am calling a function B in controller from another function A and I want that the function A which calls the another function B does not wait for the completion of function B . And Function B gets completes in the background and independent form user termination of page and function A return .

我对此进行了搜索，发现这可以通过 cron 来实现，例如 windows 中的作业、pcntl_fork() 和 laravel 中的队列功能.我是这一切的初学者.

I have searched this and found that this can be implemented through cron like jobs in windows, pcntl_fork() and Queue functionality in laravel. I am beginner in all this.

请帮忙！提前致谢.

推荐答案

如文档所述 http://laravel.com/docs/5.1/queues，首先你需要设置驱动程序 - 我会在开始时使用数据库:

as the documentation states http://laravel.com/docs/5.1/queues, first you need to setup the driver - i would go for database in the beginning :

php artisan queue:table

php artisan migrate

然后创建要添加到队列中的作业

then create the Job that you want to add to the queue

<?php

namespace AppJobs;

use AppUser;
use AppJobsJob;
use IlluminateContractsMailMailer;
use IlluminateQueueSerializesModels;
use IlluminateQueueInteractsWithQueue;
use IlluminateContractsBusSelfHandling;
use IlluminateContractsQueueShouldQueue;

class SendEmail extends Job implements SelfHandling, ShouldQueue
{
    use InteractsWithQueue, SerializesModels;

    protected $user;

    public function __construct(User $user)
    {
        $this->user = $user;
    }

    public function handle(Mailer $mailer)
    {
        $mailer->send('emails.hello', ['user' => $this->user], function ($m) {
            //
        });
    }
}

然后在 Controller 中调度作业

then in the Controller dispatch the job

<?php

namespace AppHttpControllers;

use AppUser;
use IlluminateHttpRequest;
use AppJobsSendReminderEmail;
use AppHttpControllersController;

class UserController extends Controller
{
    /**
     * Send a reminder e-mail to a given user.
     *
     * @param  Request  $request
     * @param  int  $id
     * @return Response
     */
    public function sendReminderEmail(Request $request, $id)
    {
        $user = User::findOrFail($id);

        $sendEmailJob = new SendEmail($user);

        // or if you want a specific queue

        $sendEmailJob = (new SendEmail($user))->onQueue('emails');

        // or if you want to delay it

        $sendEmailJob = (new SendEmail($user))->delay(30); // seconds

        $this->dispatch($sendEmailJob);
    }
}

为此，您需要运行队列侦听器:

For that to work, you need to be running the Queue Listener:

php artisan queue:listen

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