I am using redis in spring boot 2.0.
I wanted the data stored in redis to be set to TTL.
So I searched to find a way, and I wrote the following example code.
Person.java
@Data
@Builder
@RedisHash("Person")
public class Person implements Serializable {
@Id
private Long id;
private PersonInfo info;
}
PersonInfo.java
@Data
@Builder
@AllArgsConstructor
@NoArgsConstructor
public class PersonInfo implements Serializable {
private String name;
private Long age;
}
RedisConfig.java
@Configuration
@Slf4j
public class RedisConfig extends CachingConfigurerSupport {
@Value("${spring.redis.host}")
private String redisHost;
@Value("${spring.redis.port}")
private int redisPort;
@Value("${spring.redis.expiretime}")
private Long expireTime;
@Bean
public LettuceConnectionFactory lettuceConnectionFactory() {
log.info("Info -> Lettuce Connection Factory");
LettuceConnectionFactory lettuceConnectionFactory = new LettuceConnectionFactory();
lettuceConnectionFactory.setHostName(this.redisHost);
lettuceConnectionFactory.setPort(this.redisPort);
log.info("RedisHost -> " + lettuceConnectionFactory.getHostName());
log.info("RedisPort -> " + lettuceConnectionFactory.getPort());
log.info("ExpireTime -> " + expireTime);
return lettuceConnectionFactory;
}
@Bean
public RedisTemplate redisTemplate(LettuceConnectionFactory lettuceConnectionFactory) {
log.info("Info -> Redis Template");
RedisTemplate redisTemplate = new RedisTemplate();
redisTemplate.setKeySerializer(new StringRedisSerializer());
redisTemplate.setConnectionFactory(lettuceConnectionFactory);
return redisTemplate;
}
@Bean
public RedisCacheConfiguration cacheConfiguration() {
log.info("Info -> Redis Cache Configuration");
RedisCacheConfiguration cacheConfig = RedisCacheConfiguration.defaultCacheConfig()
.entryTtl(Duration.ofSeconds(expireTime))
.disableCachingNullValues()
.serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(new GenericJackson2JsonRedisSerializer()));
cacheConfig.usePrefix();
log.info("Duration -> " + cacheConfig.getTtl().getSeconds());
return cacheConfig;
}
@Bean
public RedisCacheManager cacheManager() {
log.info("Info -> Redis Cache Manager");
RedisCacheManager rcm = RedisCacheManager
.builder(this.lettuceConnectionFactory())
.cacheDefaults(this.cacheConfiguration())
.build();
return rcm;
}
}
PersonRedisRepository
public interface PersonRedisRepository extends CrudRepository<Person, Long> {}
PersonController.java
@RestController
@Slf4j
public class PersonController {
@Autowired
private PersonRedisRepository personRedisRepository;
@PostMapping("/person/{id}")
public Person createPerson(@PathVariable("id") Long id) {
log.info("Info -> CreatePerson START ================= ");
Person person = Person.builder()
.id(id)
.info(PersonInfo.builder()
.name("Test -> " + id)
.age(id + 15)
.build()
)
.build();
personRedisRepository.save(person);
Person getPerson = personRedisRepository.findById(id).get();
log.info("Info -> getPerson : " + getPerson.toString());
log.info("Info -> createPerson END ================= ");
return getPerson;
}
@GetMapping("/person/{id}")
public Person findPerson(@PathVariable("id") Long id) {
log.info("Info -> FindPerson START ================= ");
Person findedPerson = personRedisRepository.findById(id).get();
log.info("Info -> findedPerson : " + findedPerson.toString());
log.info("Info -> FindPerson END ================= ");
// return findedPerson;
return null;
}
}
application.yml
spring:
# Docker Redis
redis:
host: 192.168.99.100
port: 6379
expiretime: 100
server:
port: 8083
I wrote RedisConfig.java and others code and tested it as below.
I'm used Rest Client to request
Request
GET http://localhost:8083/person/7 HTTP/1.1
redis:6379> keys *
1) "Person"
2) "Person:3"
redis:6379> hgetall Person:3
1) "_class"
2) "my.cachemanager.redis.person.domain.Person"
3) "id"
4) "3"
5) "info.name"
6) "Test -> 3"
7) "info.age"
8) "18"
redis:6379> TTL Person:3
(integer) -1
I confirmed that the data was stored in redis via redis-cli. However, I also confirmed that the ttl time was not applied.
How can I apply the TTL to the data stored in Redis?
I would really appreciate your help.
You can use @TimeToLive annotation (mentioned in section 8.7 of the documentation. It can be applied to either a property or a method, (should not be applied to both for the same class)