Dynamically Adding Jobs to a Chain Within an Existing Laravel Batch at Runtime

[ManukMinasyan]

I'm working with Laravel's job batching system and need to dynamically add jobs to a chain within an existing batch during runtime. Specifically, I want to prepend or append jobs to the current job's chain and ensure they're correctly associated with the batch, with the batch's total job count updated accordingly.

To achieve this, I created a BatchChainable trait that extends Laravel's Batchable trait, adding methods to prepend or append jobs to the batch chain and update the total job count.

Here's the BatchChainable :

namespace App\Traits;

use Illuminate\Bus\BatchRepository;
use Illuminate\Bus\Batchable;

trait BatchChainable
{
    use Batchable;

    public function prependToBatchChain($job): void
    {
        $job->withBatchId($this->batchId);
        $this->prependToChain($job);
        $this->incrementBatchTotalJobs(1);
    }

    protected function incrementBatchTotalJobs(int $count = 1): void
    {
        $batchRepository = app(BatchRepository::class);
        $batchRepository->transaction(function () use ($batchRepository) {
            $batchRepository->incrementTotalJobs($this->batchId, $count);
        });
    }
}

Usage Example:

class ProcessDataJob implements ShouldQueue
{
    use BatchChainable;

    public function handle()
    {
        $this->prependToBatchChain(new AnotherJob());
    }
}

1. Is this an appropriate and safe approach to dynamically add jobs to a chain within a batch in Laravel?
2. Are there potential issues or edge cases with this implementation?
3. Is there an existing way in Laravel to achieve this without a custom trait?
   • If not, would it be worthwhile to propose this functionality to the Laravel framework?
4. Has anyone faced a similar requirement, and how did you handle it?