为什么 BroadCastEvent 在 Laravel 中排队?如何阻止它?

Why BroadCastEvent are queued in Laravel? How to stop that?

我正在做一个需要实时广播经纬度的项目

我有如下内容

namespace App\Events;
use App\Events\Event;
use Illuminate\Queue\SerializesModels;
use Illuminate\Contracts\Broadcasting\ShouldBroadcast;
use Illuminate\Support\Facades\Redis;

class TrackersBroadcast extends Event implements ShouldBroadcast
{
        public  $lat, $lng,$imei,$date_time

    use SerializesModels;

    /**
     * Create a new event instance.
     *
     * @return void
     */
    public function __construct(
                                    $lat, 
                                    $lng, 
                                    $imei, 
                                    $date_time 

                                )

    {
        $this->lat = $lat;
        $this->lng = $lng;
        $this->imei = $imei;
        $this->date_time = $date_time;

    }

    /**
     * Get the channels the event should be broadcast on.
     *
     * @return array
     */
    public function broadcastOn()
    {
        return ['tracker-channel'];
    }


}

在某些情况下我需要触发实时电子邮件,所以我决定实现 laravel 如下所示的消息队列

namespace App\Jobs;

use App\Jobs\Job;
use Illuminate\Queue\SerializesModels;
use Illuminate\Queue\InteractsWithQueue;
use Illuminate\Contracts\Queue\ShouldQueue;
use Mail;

class SendAlertEmail extends Job implements ShouldQueue
{
    use InteractsWithQueue, SerializesModels;
    public  $data;
    /**
     * Create a new job instance.
     *
     * @return void
     */
    public function __construct($data)
    {
        $this->data=$data;
    }

    /**
     * Execute the job.
     *
     * @return void
     */
    public function handle()
    {
        //
        Mail::send('emails.test', ['testVar' => $this->data], function($message) {
            $message->from('no-reply@sample.com', 'Website Name');
            $message->to('developer@gmail.com')->subject('A simple test');
        });
    }
}

每当我 运行 php artisan queue:listen database 它也会对我的广播事件进行排队。我不想排队广播事件。怎么做?

也许你可以像这样在广播事件中提到队列名称,不要听那个队列,因为你不需要处理

//php artisan queue:listen --queue=broadcast-queue

    /**
         * @return string
         */
        public function onQueue()
        {
            return 'broadcast-queue';
        }

在Laravel中所有的事件广播都默认排队。

Before broadcasting events, you will also need to configure and run a queue listener. All event broadcasting is done via queued jobs so that the response time of your application is not seriously affected.

在这种情况下,您需要两个队列驱动程序。一个用于实时支持的事件广播。一种用于处理具有队列支持的电子邮件。为此,您需要两个队列驱动程序。您可以在 config/queue.php

中定义它们

在你的 SendAlertEmail class 中执行此操作。

public $broadcastQueue = 'queue-name-for-handling-emails';

在您的 TrackersBroadcast 中说明实时队列。这是您的 redis 队列驱动程序。

public $broadcastQueue = 'real-time-queue';

参考Broadcast queue under Defining broadcast events

然后你可以像这样监听你的两个队列

$php artisan queue:listen --queue="queue-name-for-handling-emails"
$php artisan queue:listen --queue="real-time-queue"

参考Why event broadcast is queued ?

希望您觉得这很有用。

因为如果扩展 ShouldBroadcast 接口,Laravel 事件广播默认排队。如果您不想让事件广播排队,您应该扩展 ShouldBroadcastNow 接口。

use Illuminate\Contracts\Broadcasting\ShouldBroadcastNow;

class TrackersBroadcast implements ShouldBroadcastNow
{
......
}

所以这意味着您的事件广播将使用同步队列驱动程序。