PHP オブジェクト指向プログラミング: パフォーマンス最適化のヒント

class OrderController
{
    private $orderService;

    public function __construct(OrderService $orderService)
    {
        $this->orderService = $orderService;
    }

    public function getOrder(int $orderId): Order
    {
        $order = $this->orderService->findById($orderId);
        if (!$order) {
            throw new Exception("Order not found");
        }

        // 缓存订单以减少重复查询
        $cacheKey = "order_" . $orderId;
        Cache::put($cacheKey, $order, 60 * 60);

        return $order;
    }
}

class OrderService
{
    private $orderRepository;

    public function __construct(OrderRepository $orderRepository)
    {
        $this->orderRepository = $orderRepository;
    }

    public function findById(int $orderId): ?Order
    {
        // 尝试从缓存中获取订单
        $cacheKey = "order_" . $orderId;
        $cachedOrder = Cache::get($cacheKey);

        if ($cachedOrder) {
            return $cachedOrder;
        }

        // 如果缓存中没有订单，则从数据库中加载
        $order = $this->orderRepository->find($orderId);
        if ($order) {
            // 存储订单到缓存中以供将来使用
            Cache::put($cacheKey, $order, 60 * 60);
        }

        return $order;
    }
}