Background

I checked the validity period designation of Redis, but I created an article because the description was old and there was little information that can be used as it is * Surveyed as of 20200827

Confirm that Redis can specify the validity period for each data in Spring Cache

build.gradle

implementation 'org.springframework.boot:spring-boot-starter-cache'
implementation 'org.springframework.boot:spring-boot-starter-data-redis'

Create configuration class

@Configuration
@EnableCaching
public class RedisConfig {

	@Bean
	public CacheManager cacheManager(RedisConnectionFactory fac) {
		
        //1. 1. Create cache from cache builder
		RedisCacheManagerBuilder builder = RedisCacheManager.builder(fac);
		builder
			.cacheDefaults(
		//2. Set default cache expiration
					RedisCacheConfiguration.defaultCacheConfig().entryTtl(Duration.ofDays(1)))
		//3. 3. Set an expiration date for the cache named cache1
			.withCacheConfiguration("cache1", 
					RedisCacheConfiguration.defaultCacheConfig().entryTtl(Duration.ofMinutes(1)))
		//3. 3. Set an expiration date for the cache named cache2
			.withCacheConfiguration("cache2", 
					RedisCacheConfiguration.defaultCacheConfig().entryTtl(Duration.ofHours(1)));

		return builder.build();
	}
}

** Supplement **

１．

RedisCacheManager is created via a builder, which is a static inner class
RedisCacheWriter can be specified as an argument instead of Factory (Internally converted from Fabricy⇒RedisCacheWriter, either entrance is acceptable)
You can make it without using a builder by doing the following. In this case, it will be the default expiration date (infinite period).

//fac is a RedisConnectionFactory type
RedisCacheManager rcm = RedisCacheManager.create(fac);

２．

The method to set the default expiration date and the expiration date for each data is different.

３．

Validity period can be flexibly set such as date and time using Duration
Settings for each data have MAP inside
By using the withInitialCacheConfigurations method, you can also register the settings in a MAP created in advance.

Controller for operation check (create cache1 and cache2)

@RestController
@RequestMapping("/api/sample")
public class SampleRedisCacheController {

	@Autowired
	CacheManager cm;

	@GetMapping("redisCache")
	public String redisCache() {

		Cache c1 = cm.getCache("cache1");
		c1.put("k1", 123456);
		c1.put("k2", 234567);

		Cache c2 = cm.getCache("cache2");
		c2.put("k1", 123456);
		c2.put("k2", 234567);

		return "redis cache test";
	}
}

Check result

Access the following and the cache will be created in Redis 　http://localhost:8080/api/sample/redisCache
Redis expiration date is according to the setting class
It's been a while before the TTL is issued.

comment

The contents of the CacheManager class seemed difficult, but I understood how to make it and various settings. The builder was mentioned in Effective Java. I feel that it was introduced because it is convenient to use when there are many arguments of the constructor. I think that it has been introduced because there are many setting values this time.