[Solved] Why does @CachePut update the cache even if the cached value already exists, unlike @Cacheable? — Ans: @CachePut always executes the method and updates cache to keep data fresh. | Spring Boot

Spring Boot - Caching

Why does @CachePut update the cache even if the cached value already exists, unlike @Cacheable?

A@CachePut only caches null return values.

B@CachePut skips method execution if cache exists.

C@CachePut always executes the method and updates cache to keep data fresh.

D@CachePut clears the cache before method execution.

Step-by-Step Solution

Solution:

Step 1: Compare @CachePut and @Cacheable behavior
@Cacheable caches method result only if absent, skipping method execution if cached. @CachePut always runs method and updates cache.
Step 2: Understand why @CachePut updates cache every time
This ensures cache stays fresh with latest data after method runs, unlike @Cacheable which may serve stale data.
Final Answer:
@CachePut always executes the method and updates cache to keep data fresh. -> Option C
Quick Check:
@CachePut refreshes cache by always running method [OK]

Quick Trick: @CachePut runs method always to refresh cache [OK]

Common Mistakes:

Master "Caching" in Spring Boot

9 interactive learning modes - each teaches the same concept differently

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Why does @CachePut update the cache even if the cached value already exists, unlike @Cacheable?