@EnableCaching annotation in Spring Boot - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to enable caching in a Spring Boot application.

Spring Boot

@Configuration
@[1]
public class CacheConfig {
    @Bean
    public CacheManager cacheManager() {
        return new ConcurrentMapCacheManager("items");
    }
}

Drag options to blanks, or click blank then click option'

AEnableTransactionManagement

BEnableScheduling

CEnableAsync

DEnableCaching

Attempts:

3 left

💡 Hint

Common Mistakes

Using @EnableScheduling instead of @EnableCaching

Forgetting to add @EnableCaching on a configuration class

The @EnableCaching annotation activates Spring's annotation-driven cache management capability.

2fill in blank

medium

Complete the method annotation to cache the result of the method.

Spring Boot

public class ProductService {
    @[1]("products")
    public Product getProductById(Long id) {
        // method implementation
    }
}

Drag options to blanks, or click blank then click option'

ACacheable

BCachePut

CCacheEvict

DCacheConfig

Attempts:

3 left

💡 Hint

Common Mistakes

Using @CachePut when @Cacheable is needed

Not specifying the cache name in the annotation

The @Cacheable annotation tells Spring to cache the result of the method using the specified cache name.

3fill in blank

hard

Fix the error in the cache eviction annotation to clear the cache named 'users'.

Spring Boot

public class UserService {
    @CacheEvict(cacheNames = [1])
    public void clearUserCache() {
        // method implementation
    }
}

Drag options to blanks, or click blank then click option'

A"user"

Busers

C"users"

Duser

Attempts:

3 left

💡 Hint

Common Mistakes

Not using quotes around the cache name

Using singular instead of plural cache name

The cacheNames attribute requires the cache name as a string literal, so it must be quoted.

4fill in blank

hard

Fill both blanks to create a cache manager bean that uses a simple concurrent map cache.

Spring Boot

@Bean
public CacheManager cacheManager() {
    return new [1]([2]);
}

Drag options to blanks, or click blank then click option'

AConcurrentMapCacheManager

B"defaultCache"

C"itemsCache"

DSimpleCacheManager

Attempts:

3 left

💡 Hint

Common Mistakes

Using SimpleCacheManager without configuring caches

Passing cache name without quotes

ConcurrentMapCacheManager is a simple cache manager using concurrent maps. The cache name must be a string.

5fill in blank

hard

Fill all three blanks to define a cacheable method that caches by product ID and evicts cache on update.

Spring Boot

public class ProductService {

    @Cacheable(cacheNames = [1], key = "#[2]")
    public Product getProduct(Long [2]) {
        // fetch product
    }

    @CacheEvict(cacheNames = [1], key = "#[2]")
    public void updateProduct(Long [2]) {
        // update product
    }
}

Drag options to blanks, or click blank then click option'

A"products"

Bid

C"productId"

D"items"

Attempts:

3 left

💡 Hint

Common Mistakes

Using different cache names for caching and eviction

Mismatching key parameter names

The cache name is 'products'. The key uses the method parameter named 'id' to cache and evict the correct entry.