如何使用 spring boot 2.0 配置 redis ttl

Question

我在 spring boot 2.0 中使用 redis。

我希望将存储在 redis 中的数据设置为 TTL。

于是找了个办法，写了下面的示例代码。

人.java

@Data
@Builder
@RedisHash("Person")
public class Person implements Serializable {

    @Id
    private Long id;

    private PersonInfo info;
}

个人信息.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> {}

个人控制器.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;
    }
}

应用程序.yml

spring:
  # Docker Redis
  redis:
    host: 192.168.99.100
    port: 6379
    expiretime: 100

server:
  port: 8083

我编写了 RedisConfig.java 和其他代码并进行了如下测试。

我用 Rest Client 来请求

要求

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

我确认数据是通过redis-cli存储在redis中的。但是，我也确认未应用 ttl 时间。

如何将 TTL 应用于存储在 Redis 中的数据？

我将衷心感谢您的帮助。

Answer 1

您可以使用@TimeToLive注释（在文档第 8.7 节中提到。它可以应用于属性或方法，（不应应用于同一类的两者）