Best Practices for a .NET 10 Event Ticketing API

Diamond Debugger — Sat, 01 Mar 2025 18:55:57 +0000

How Would You Design a Scalable and Maintainable Event Ticketing API?
Hey everyone,

I’m working on designing a mock event ticketing API, and I want to make sure I’m applying best practices, design patterns, and scalable architecture. I don’t just want a working solution—I want to learn how to write clean, optimized, and maintainable code.

What I’d Love Input On
🔹 Design Patterns – Should I use Factory, Strategy, or something else to handle different booking flows?
🔹Handling Long-Running Operations – Would background tasks, a queue, or a worker service be better than polling?
🔹 Scalability & Maintainability – How would you structure this API to easily add more ticket types in the future?
🔹 Performance Optimization – What are some anti-patterns I should avoid when handling in-memory data?
🔹 Error Handling & Security – How would you implement global exception handling and authorization best practices?

This API will allow users to:

Search for event tickets (concerts, sports games, theater shows) based on location and date.
Book a selected ticket, storing booking details in memory.
Check the booking status, since ticket processing may take time.

Requirements & Constraints
The system should support different search types:

EventOnly– Regular search for event tickets based on location and date.
VIPPackage– Searches for premium experiences like VIP seating and backstage access.
LastMinuteTickets– Special last-minute deals for events happening within the next 30 days.
No external database – all data should be stored in-memory for now.
Bookings take time to process, so users need to poll for status updates.
System should be easily extendable, since new ticket types might be added later.
The API should be built using .NET 10 with asynchronous programming in mind.
Need to follow SOLID principles, clean code, and design patterns for scalability.

Proposed API Structure
Endpoints:

SearchTickets(GET) – Returns available event ticket options.
BookTicket(POST) – Stores a ticket booking with a random booking code.
CheckBookingStatus(GET) – Returns the booking status (Pending, Success, or Failed).

Business Logic & Booking Flow

Users search for available tickets based on location, date, and event type.
The system fetches event ticket data from a (mock) external source.
Users book a ticket, and the system assigns a random BookingCode.
Ticket processing is delayed (random wait time of 30-60 seconds).
Users check their booking status:
VIPPackage bookings always succeed.
EventOnly bookings succeed after processing time.
LastMinuteTickets bookings have a higher failure rate due to limited availability.

I'm looking to improve my skills in more advanced techniques, so any guidance or feedback is greatly appreciated!

DEV Community: Diamond Debugger

Best Practices for a .NET 10 Event Ticketing API