[Solved] What is wrong with this usage?@CacheEvict(cacheNames = "products", key = "id") public void evictProduct(Long id) { /* logic */ } | Spring Boot

Spring Boot - Caching

What is wrong with this usage?

@CacheEvict(cacheNames = "products", key = "id")
public void evictProduct(Long id) { /* logic */ }

AMethod must return a value to use @CacheEvict

BThe key expression should be '#id' to reference the method parameter

CcacheNames should be 'product' not 'products'

DThe annotation must be placed on a class, not a method

Step-by-Step Solution

Solution:

Step 1: Check key expression syntax
The key must use SpEL with '#' to reference parameters, so it should be '#id'.
Step 2: Validate other attributes
cacheNames can be any valid cache name; method return type and annotation placement are correct.
Final Answer:
The key expression should be '#id' to reference the method parameter -> Option B
Quick Check:
Key must use # for parameter reference [OK]

Quick Trick: Always prefix key with # for method parameters [OK]

Common Mistakes:

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