Cleaner Queue Chains with Laravel's Enum Integration

Laravel now supports direct use of backed enums with the Bus facade's onQueue method, eliminating the need to manually access the enum's value property. This improvement creates cleaner, more expressive code when working with job chains and queues.

This enhancement is particularly useful when building complex job pipelines that need to be directed to different queues based on priority, resource requirements, or business logic.

use App\Enums\QueueType;
 
// Use enum directly without ->value
Bus::chain($jobs)
    ->onQueue(QueueType::Background)
    ->dispatch();

Here's a practical example of implementing a document processing system:

<?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();
        }
    }
}