Super Cache Evict

A Spring Boot proof of concept (POC) focused on advanced distributed cache eviction strategies using Redis, centered around a custom annotation:

🔥 @SuperCacheEvict

This project was built to experiment with and demonstrate a more powerful and flexible cache eviction mechanism on top of Spring’s default cache abstraction.

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🚀 The Core Idea

Spring provides @Cacheable and @CacheEvict, which work well for simple scenarios.

However, in real-world distributed systems, eviction often requires:

• Multiple related keys to be invalidated together
• Pattern-based eviction
• Context-aware invalidation
• Cross-cuting eviction rules
• Decoupling eviction logic from business services

That’s where @SuperCacheEvict comes in.

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🧠 What is @SuperCacheEvict?

@SuperCacheEvict is a custom annotation designed to:

• Centralize eviction rules
• Abstract complex invalidation logic
• Allow advanced key strategies
• Enable AOP-driven eviction behavior
• Improve maintainability in microservice environments

Instead of scattering eviction logic across multiple services using @CacheEvict, this annotation acts as a single, expressive eviction entry point.

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🏗 Architecture Overview

The POC leverages:

• Spring Cache Abstraction
• Redis as a distributed cache
• Spring AOP to intercept @SuperCacheEvict
• Actuator + Micrometer for observability

Flow:

1. A method is annotated with @SuperCacheEvict
2. A custom AOP aspect intercepts execution
3. Eviction rules are resolved
4. Matching Redis keys are invalidated
5. Metrics can be recorded for observability

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🎯 Why Not Just Use @CacheEvict?

@CacheEvict is limited when:

• You need pattern-based eviction
• Cache keys are dynamically composed
• Multiple caches must be invalidated conditionally
• Eviction logic must evolve independently of business code
• You want a reusable eviction abstraction across services

@SuperCacheEvict is designed to solve these architectural limitations.

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🧪 What This POC Demonstrates

• Custom annotation design
• AOP-based cross-cutting eviction logic
• Advanced Redis key management
• Distributed cache invalidation strategies
• Extensible eviction rule modeling
• Observability of cache operations

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🏗 Tech Stack

• Spring Boot
• Spring Web
• Spring Data Redis
• Spring Cache
• Spring AOP
• Spring Boot Actuator
• Micrometer + Prometheus
• Redis

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📦 Running the Project

1️⃣ Start Redis

docker run -p 6379:6379 redis

2️⃣ Configure Application

spring.redis.host=localhost
spring.redis.port=6379

3️⃣ Run the Application

mvn spring-boot:run

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🧠 Architectural Value

This repository is especially useful for backend engineers working with:

• High-scale systems
• Event-driven architectures
• Distributed microservices
• Complex domain models (DDD)
• Consistency-sensitive applications (finance, payments, marketplaces)

Correct cache invalidation is one of the hardest problems in distributed systems.

@SuperCacheEvict is an experiment in making that problem more explicit, maintainable, and extensible.

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🚧 Future Improvements

• Rule DSL for eviction policies
• Support for multi-node cache invalidation
• Event-driven eviction integration
• Integration testing scenarios
• Performance benchmarking

🤝 Contributions

Contributions are welcome.

If you’re interested in distributed caching strategies or advanced eviction patterns, feel free to open an issue or submit a pull request.