Implement rate limiting using Bucket4j

[nanotaboada]

Description

To prevent abuse and ensure fair usage of our RESTful API, we should implement rate limiting using Bucket4j, a Java rate-limiting library based on the token bucket algorithm. This will help improve system reliability and provide a better experience for all users.

Proposed Approach

• Integrate Bucket4j via a filter or interceptor in the Spring Boot application.
• Apply rate limiting at the controller level using IP-based or user-based keys.
• Use an in-memory store for buckets (ConcurrentHashMap) in the first iteration.
• Define rate limit configuration (e.g., 10 requests per minute) in a central config file or class.
• Consider using annotations or AOP for cleaner integration if applicable.

Acceptance Criteria

• Add Bucket4j dependency to the project.
• Implement a filter/interceptor that applies rate limiting logic.
• Protect at least one public-facing endpoint with rate limiting.
• Return HTTP 429 Too Many Requests when rate limit is exceeded.
• Log events when requests are throttled for observability.
• Include basic unit and/or integration tests for the rate limiter.

Reference

• 🔗 Follow this guide as a base: Baeldung - Rate Limiting with Bucket4j

[Rohit-byt]

Hi, I’m new to open source and would love to work on this. Can I take this up?

[nanotaboada]

Hi, I’m new to open source and would love to work on this. Can I take this up?

Absolutely!