Handling Race Conditions in Laravel Jobs and Queues

Use Laravel’s DB::listen() to log queries during development:

   use Illuminate\Support\Facades\DB;

   DB::listen(function ($query) {
       logger($query->sql, $query->bindings);
   });

To share the centralized data globally in Blade templates:

Add the following to the boot method of the service provider:

   public function boot()
   {
       Event::listen('settings.updated', function () {
           $globalPreferences = [
               'api_limit' => Setting::get('api_limit'),
               'app_mode' => Setting::get('app_mode'),
               'feedback_form_enabled' => Setting::get('feedback_form_enabled'),
           ];

           view()->share('globalPreferences', $globalPreferences);
       });
   }

If data depends on the current user or request, consider using middleware to inject data conditionally.

Using the singleton pattern, we’ll make this data globally accessible and reusable.

Laravel’s service container provides a simple way to implement the singleton pattern.

• Locks: MySQL automatically locks the necessary rows during transactions to prevent conflicts. However, you can manually acquire locks using the LOCK TABLES command if needed.
• Deadlocks: Occur when two or more transactions block each other. MySQL automatically detects deadlocks and rolls back one of the transactions.

LOCK TABLES accounts WRITE;

-- Perform operations here

UNLOCK TABLES;