Caching

Overview Laravel just released versions 12.34 and 12.35, introducing powerful tools to manage asynchronous tasks and system resilience. These updates focus on improving the user experience by moving heavy workloads out of the request-response cycle and providing robust failover mechanisms for mission-critical services like Redis. Prerequisites To follow along, you should have a solid grasp of: * PHP 8.2 or higher * Basic understanding of the Laravel Service Container and Queues * Familiarity with `config/cache.php` and `config/queue.php` structures Key Libraries & Tools * **Laravel Framework**: The core PHP framework receiving these updates. * **Redis**: Often used as the primary driver for both caching and queuing. * **Laravel Herd**: A local development environment used to demonstrate service management. The Deferred Queue Connection One of the most impactful additions is the `deferred` queue connection. Unlike the standard `sync` driver—which blocks the user's browser until the job finishes—the `deferred` driver processes the job immediately after the HTTP response is sent to the client. ```php // In your Controller ProcessNewPost::dispatch($post)->onConnection('deferred'); return redirect()->route('posts.index'); ``` By switching to the `deferred` connection, the user sees an immediate redirect, while the "heavy" logic runs in the background. This provides the speed of an asynchronous worker without needing to configure a separate daemon for local development. Implementing Failover Strategies Systems fail. Laravel now provides a native `failover` driver for both Cache and Queues. If your primary Redis instance goes down, the system automatically falls back to your secondary store. ```php // config/cache.php 'stores' => [ 'failover' => [ 'driver' => 'failover', 'stores' => ['redis', 'database', 'array'], ], ] ``` Syntax Notes * **Fluent Configuration**: The `failover` driver expects a prioritized list of stores in the `stores` array. * **Driver Switching**: You must update your `.env` file (e.g., `CACHE_STORE=failover`) to activate these strategies. Tips & Gotchas * **Persistence**: Remember that the `array` cache driver is not persistent across requests; use `database` as a secondary fallback if data persistence is required during Redis outages. * **Debugging**: When using the `deferred` connection, use `Log::info()` to verify job completion since you won't see errors in the browser once the response is sent.