Planned lessonMID-038-L04

Redis from Spring

Lesson 4 of 7
Mid-level

On This Lesson 4 topics

In this lesson
Planned topics
Draft outline details
Practice

This lesson is planned. The outline below lists the topics it will cover. The full lesson has not been published yet.

In this lesson

use Redis through Spring Data Redis and cache annotations.

Planned topics

spring-boot-starter-data-redis configures a connection factory; StringRedisTemplate handles strings.
RedisTemplate needs serializers; prefer JSON over Java serialization.
Enable caching with @EnableCaching, define a RedisCacheManager with per-cache TTL.
@Cacheable fills the cache, @CacheEvict removes entries, @CachePut updates.
Annotations work through proxies: a self-call inside the same class bypasses the cache.

Draft outline details

Demonstration

java

@Cacheable(cacheNames = "products", key = "#id")
public ProductDto findProduct(long id) { return repo.load(id); }

RedisCacheConfiguration cfg = RedisCacheConfiguration.defaultCacheConfig()
    .entryTtl(Duration.ofMinutes(10)).disableCachingNullValues();

Check your understanding

Why might @Cacheable not work on a method called from the same class?

Show answer

The proxy is bypassed.

Practice

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