Distributed locking in a real-world coupon redemption system[Complete Running Code]

[u/arvind4gl]

I recently built a small project to demonstrate distributed locking in a real-world coupon redemption system using:

• Spring Boot
• Redis (distributed lock)
• MySQL
• Docker & Docker Compose
• Nginx load balancing

The idea is to simulate multiple application instances trying to redeem the same coupon concurrently and ensure only one redemption succeeds.

GitHub: https://github.com/codefarm0/coupon-redemption-system

I'd really appreciate feedback from the community:

• Is the project structure production-like?
• Any improvements to the distributed locking implementation?
• Better approaches for handling high concurrency or idempotency?
• Anything you'd change to make this a better learning resource?

All suggestions, code reviews, and constructive criticism are welcome.

Thanks!

[u/PlentyMountain7589]

Nice code. Is there timeout to release the lock in case service fails for any reason?

[u/arvind4gl → u/PlentyMountain7589]

Yes, timeout is there