Spring Boot Caching (@Cacheable, @CachePut, @CacheEvict)

Goal

Learn how to use Spring’s caching abstraction to boost performance by reducing DB calls.

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Key Concepts

Annotation	Purpose
@Cacheable	Caches method result (skips re-execution next time)
@CachePut	Updates cache when data changes
@CacheEvict	Removes cache entry after deletion

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Example Endpoints

POST /api/products
{
  "name": "Laptop",
  "price": 85000
}

GET /api/products/1   # First call hits DB (slow)
GET /api/products/1   # Second call is instant (from cache)
DELETE /api/products/1   # Evicts from cache