我正在寻找一种使用 spring 注释设置 TTL 的方法。
我试过了
@CacheEvict(allEntries = true, value = { "mycache" })
@Scheduled(fixedDelay = 5000)
然后将 @EnableScheduling
放在我的 Application.java
上,但没有成功。
我还在类上尝试了 @RedisHash(timeToLive=2000)
有和没有 @TimeToLive(unit = TimeUnit.SECONDS)
方法。
然后我尝试将 @EnableRedisRepositories(keyspaceConfiguration = UserKeySpaceConfiguration.class)
放在我的类(class)上
public class UserKeySpaceConfiguration extends KeyspaceConfiguration {
/**
* {@inheritDoc}
*
* @see org.springframework.data.redis.core.convert.KeyspaceConfiguration#getKeyspaceSettings(java.lang.Class)
*/
@Override
public KeyspaceSettings getKeyspaceSettings(final Class<?> type) {
final KeyspaceSettings keyspaceSettings = new KeyspaceSettings(type, "user-keyspace");
keyspaceSettings.setTimeToLive(172800L);
return keyspaceSettings;
}
/**
* {@inheritDoc}
* @see org.springframework.data.redis.core.convert.KeyspaceConfiguration#hasSettingsFor(java.lang.Class)
*/
@Override
public boolean hasSettingsFor(final Class<?> type) {
return true;
}
}
所有这些方法都行不通。
当我检查 Redis 我的键是否有 TTL 时,我总是有 -1
。
关于如何进行的任何想法?
谢谢。
最佳答案
经过一周的搜索,我找到了解决方案。
要在不同的 key 上使用不同的 TTL,您必须创建自己的缓存管理器。
所以在您的 Application.java
中添加您的自定义缓存管理器。
@SpringBootApplication
@EnableSwagger2
@EnableCaching
public class Application extends SpringBootServletInitializer {
public static void main(final String[] args) throws Exception {
SpringApplication.run(Application.class, args);
}
@Primary
@Bean
public RedisCacheManager cacheManager(final RedisConnectionFactory connectionFactory) {
final RedisCacheWriter redisCacheWriter = RedisCacheWriter.lockingRedisCacheWriter(connectionFactory);
final SerializationPair<Object> valueSerializationPair = RedisSerializationContext.SerializationPair.fromSerializer(new GenericJackson2JsonRedisSerializer());
final RedisCacheConfiguration cacheConfiguration = RedisCacheConfiguration.defaultCacheConfig();
final RedisCacheManager redisCacheManager = new RedisCacheManager(redisCacheWriter, cacheConfiguration);
return redisCacheManager;
}
@Bean(name = "pickleCacheManager")
public RedisCacheManager pickleCacheManager(final RedisConnectionFactory connectionFactory) {
final RedisCacheWriter redisCacheWriter = RedisCacheWriter.lockingRedisCacheWriter(connectionFactory);
final SerializationPair<Object> valueSerializationPair = RedisSerializationContext.SerializationPair.fromSerializer(new GenericJackson2JsonRedisSerializer());
RedisCacheConfiguration cacheConfiguration = RedisCacheConfiguration.defaultCacheConfig();
cacheConfiguration = cacheConfiguration.entryTtl(Duration.ofSeconds(120));
final RedisCacheManager redisCacheManager = new RedisCacheManager(redisCacheWriter, cacheConfiguration);
return redisCacheManager;
}
@Bean(name = "userCacheManager")
public RedisCacheManager userCacheManager(final RedisConnectionFactory connectionFactory) {
final RedisCacheWriter redisCacheWriter = RedisCacheWriter.lockingRedisCacheWriter(connectionFactory);
final SerializationPair<Object> valueSerializationPair = RedisSerializationContext.SerializationPair.fromSerializer(new GenericJackson2JsonRedisSerializer());
RedisCacheConfiguration cacheConfiguration = RedisCacheConfiguration.defaultCacheConfig();
cacheConfiguration = cacheConfiguration.entryTtl(Duration.ofSeconds(172800));
final RedisCacheManager redisCacheManager = new RedisCacheManager(redisCacheWriter, cacheConfiguration);
return redisCacheManager;
}
}
为了区分你的缓存,你有一个带有注释 @Bean
的属性 name
。
您需要有一个@Primary
@Bean
否则您的应用程序将崩溃。在我的例子中,我的主要 juste 返回缓存而不改变。
所以在这个自定义缓存中我只是添加了一个 TTL
cacheConfiguration = cacheConfiguration.entryTtl(Duration.ofSeconds(120));
当你在一个方法上使用你的缓存时,你只需要像这样指定你的缓存:
@Cacheable(value = "value", key = "#key", cacheManager = "yourCacheName")
以我为例
@Cacheable(value = "pickle", key = "#pickleId", cacheManager = "pickleCacheManager")
Pickle findFirstById(String pickleId);
@Cacheable
中的cacheManager
是@Bean
中的name
。
关于Java Spring Redis : Set time to live with annotation,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/51269477/