View file vendor/illuminate/events/CallQueuedHandler.php

<?php

namespace Illuminate\Events;

use Illuminate\Contracts\Queue\Job;
use Illuminate\Contracts\Container\Container;

class CallQueuedHandler
{
    /**
     * The container instance.
     *
     * @var \Illuminate\Contracts\Container\Container
     */
    protected $container;

    /**
     * Create a new job instance.
     *
     * @param  \Illuminate\Contracts\Container\Container  $container
     * @return void
     */
    public function __construct(Container $container)
    {
        $this->container = $container;
    }

    /**
     * Handle the queued job.
     *
     * @param  \Illuminate\Contracts\Queue\Job  $job
     * @param  array  $data
     * @return void
     */
    public function call(Job $job, array $data)
    {
        $handler = $this->setJobInstanceIfNecessary(
            $job, $this->container->make($data['class'])
        );

        call_user_func_array(
            [$handler, $data['method']], unserialize($data['data'])
        );

        if (! $job->isDeletedOrReleased()) {
            $job->delete();
        }
    }

    /**
     * Set the job instance of the given class if necessary.
     *
     * @param  \Illuminate\Contracts\Queue\Job  $job
     * @param  mixed  $instance
     * @return mixed
     */
    protected function setJobInstanceIfNecessary(Job $job, $instance)
    {
        if (in_array('Illuminate\Queue\InteractsWithQueue', class_uses_recursive(get_class($instance)))) {
            $instance->setJob($job);
        }

        return $instance;
    }

    /**
     * Call the failed method on the job instance.
     *
     * The event instance and the exception will be passed.
     *
     * @param  array  $data
     * @param  \Exception  $e
     * @return void
     */
    public function failed(array $data, $e)
    {
        $handler = $this->container->make($data['class']);

        $parameters = array_merge(unserialize($data['data']), [$e]);

        if (method_exists($handler, 'failed')) {
            call_user_func_array([$handler, 'failed'], $parameters);
        }
    }
}