Design a reservation and payment system for a parking garage
Design a reservation and payment system for a parking garage. Functional requirements include "spot booking", the ability to make payments, prevent booking the same parking spot, different classes of parking spots (compact,regular,large vehicles, handicap) with different prices. The non functional requirements include high consistency and availability.
Designing a reservation and payment system for a parking garage requires handling both the functional and non-functional requirements.
For functional requirements, the system needs to allow users to book parking spots based on availability and vehicle type (compact, regular, large, handicap). A database would track available spots in real-time, ensuring no double-booking. Different prices for various spot types can be implemented with price tiers. Payment functionality needs integration with a secure payment gateway, storing transactions safely. The system should also handle cancellations and modifications, refunding or charging accordingly. A user-friendly interface (e.g., web or mobile) will let customers view availability, book, and pay for spots.
On the non-functional side, high consistency is crucial for preventing race conditions when booking spots—this can be achieved using strong database constraints and locking mechanisms. Availability is equally important, meaning the system should handle downtime gracefully and scale horizontally. Techniques like caching (e.g., Redis for fast spot availability lookups), database replication, and load balancing will help maintain high uptime. Ideally, the system should also ensure quick response times for querying spot availability and processing payments, while being secure to prevent data breaches.
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