Add AOP-based @RateLimited Annotation Support

[rojae]

Add AOP-based @ratelimited Annotation Support

Background

FluxGate currently uses Filter-based rate limiting. This proposal adds AOP support for method-level rate limiting.

Proposed Usage

@RestController
public class ApiController {

    @RateLimited(key = "user-api", capacity = 100, refillPerSecond = 10)
    @GetMapping("/api/users")
    public List<User> getUsers() {
        return userService.findAll();
    }

    @RateLimited(ruleSetId = "premium-api")  // Reference to MongoDB rule
    @PostMapping("/api/premium/action")
    public Result performAction() {
        return premiumService.execute();
    }
}

Comparison: Filter vs AOP

Aspect	Filter	AOP
Granularity	URL pattern	Method level
Non-HTTP Support	No	Yes
Dynamic Rules	Yes	Partial
Use Case	API Gateway	Business methods

Questions for Discussion

1. Same module or separate? (fluxgate-spring-boot-starter vs fluxgate-aop-support)
2. Priority? Filter covers most use cases already
3. Key resolution? SpEL expressions vs built-in strategies

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Looking for community feedback.

[rojae]

This part is being development in development/sprintboot-starter/support-aop branch.

• https://github.com/OpenFluxGate/fluxgate/tree/development/sprintboot-starter/support-aop