Redis, Caching, Cache Invalidation, Distributed Cache, Cache Coherence.
"product:price:" + productId; String cachedPrice = redisTemplate.opsForValue().get(cacheKey); if (cachedPrice != null) { return new BigDecimal(cachedPrice); } // If not found in cache, fetch the price from the database Product product = productRepository.findById(productId).orElse(null); if