Rantai giliran bersih dengan integrasi enum Laravel ' s

use App\Enums\QueueType;

// 直接使用枚举，无需 ->value
Bus::chain($jobs)
    ->onQueue(QueueType::Background)
    ->dispatch();

<?php namespace App\Enums;

enum ProcessingQueue: string
{
    case Immediate = 'realtime';
    case Standard = 'default';
    case Batch = 'batch-process';
    case LowPriority = 'low-priority';
}

namespace App\Services;

use App\Enums\ProcessingQueue;
use App\Jobs\ProcessDocument;
use App\Jobs\GenerateThumbnail;
use App\Jobs\ExtractMetadata;
use App\Jobs\NotifyUser;
use App\Models\Document;
use Illuminate\Support\Facades\Bus;

class DocumentProcessor
{
    public function process(Document $document, bool $isPriority = false)
    {
        $queue = $isPriority
            ? ProcessingQueue::Immediate
            : ProcessingQueue::Standard;

        Bus::chain([
            new ProcessDocument($document),
            new ExtractMetadata($document),
            new GenerateThumbnail($document),
            new NotifyUser($document->user, 'Document processing complete')
        ])
        ->onQueue($queue)
        ->dispatch();

        return $document;
    }

    public function batchProcess(array $documentIds)
    {
        foreach ($documentIds as $id) {
            $document = Document::find($id);

            Bus::chain([
                new ProcessDocument($document),
                new GenerateThumbnail($document)
            ])
            ->onQueue(ProcessingQueue::Batch)
            ->dispatch();
        }
    }
}