Spring Boot - Caching
You want to cache only orders with amount greater than 500 in Redis using Spring Boot caching. Which approach correctly implements this?
You want to cache only orders with amount greater than 500 in Redis using Spring Boot caching. Which approach correctly implements this?
hard📝 Application Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Use condition attribute
@Cacheable supports SpEL condition to cache selectively.Step 2: Apply condition for amount
Setting condition = "#order.amount > 500" caches only qualifying orders.Step 3: Evaluate other options
@CachePut updates cache but doesn't filter; @CacheEvict removes entries after caching; Redis itself doesn't filter cache entries automatically.Final Answer:
Use @Cacheable with a condition: @Cacheable(value = "orders", condition = "#order.amount > 500") -> Option DQuick Check:
Use condition in @Cacheable to filter cache [OK]
Quick Trick: Use @Cacheable condition to cache selectively [OK]
Common Mistakes:
- Trying to filter cache entries inside Redis config
- Using @CachePut without condition
- Relying on @CacheEvict to filter cache
Master "Caching" in Spring Boot
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