[Solved] Given this method in a Spring Boot service: @CachePut(value = "items", key = "#item.... } What will be cached after calling updateItem with an item named "book"? | Spring Boot

Spring Boot - Caching

Given this method in a Spring Boot service:

@CachePut(value = "items", key = "#item.id")
public Item updateItem(Item item) {
    item.setName(item.getName().toUpperCase());
    return item;
}

What will be cached after calling updateItem with an item named "book"?

AAn item with name "book" cached under the item's id key.

BAn item with name "BOOK" cached under a default key.

CNo caching occurs because the method modifies the item.

DAn item with name "BOOK" cached under the item's id key.

Step-by-Step Solution

Solution:

Step 1: Understand method behavior and @CachePut effect
The method changes the item's name to uppercase and returns it. @CachePut caches the returned value under the key '#item.id'.
Step 2: Determine cached value and key
The cached item will have name "BOOK" (uppercase) and be stored under the item's id key, not a default key.
Final Answer:
An item with name "BOOK" cached under the item's id key. -> Option D
Quick Check:
@CachePut caches returned updated value with specified key [OK]

Quick Trick: @CachePut caches method return value after update [OK]

Common Mistakes:

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