Java 如何在 Spring Boot 中驱逐所有缓存？
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/38358664/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
How can I evict ALL cache in Spring Boot?
提问by iCodeLikeImDrunk
On app start, I initialized ~20 different caches:
在应用程序启动时，我初始化了大约 20 个不同的缓存：
@Bean
public CacheManager cacheManager() {
SimpleCacheManager cacheManager = new SimpleCacheManager();
cacheManager.setCaches(Arrays.asList(many many names));
return cacheManager;
}
I want to reset all the cache at an interval, say every hr. Using a scheduled task:
我想每隔一段时间重置所有缓存，比如每隔一小时。使用计划任务：
@Component
public class ClearCacheTask {
private static final Logger logger = LoggerFactory.getLogger(ClearCacheTask.class);
private static final DateTimeFormatter formatter = DateTimeFormat.forPattern("yyyy-MM-dd hh:mm:ss");
@Value("${clear.all.cache.flag}")
private String clearAllCache;
private CacheManager cacheManager;
@CacheEvict(allEntries = true, value="...............")
@Scheduled(fixedRate = 3600000, initialDelay = 3600000) // reset cache every hr, with delay of 1hr
public void reportCurrentTime() {
if (Boolean.valueOf(clearAllCache)) {
logger.info("Clearing all cache, time: " + formatter.print(DateTime.now()));
}
}
}
Unless I'm reading the docs wrong, but @CacheEvictrequires me to actually supply the name of the cache which can get messy.
除非我读错了文档，但 @CacheEvict要求我实际提供可能会变得混乱的缓存名称。
How can I use @CacheEvictto clear ALL caches?
如何使用 @CacheEvict清除所有缓存？
I was thinking instead of using @CacheEvict, I just loop through all the caches:
我在想而不是使用 @CacheEvict，我只是遍历所有缓存：
cacheManager.getCacheNames().parallelStream().forEach(name -> cacheManager.getCache(name).clear());
采纳答案by iCodeLikeImDrunk
I just used a scheduled task to clear all cache using the cache manager.
我只是使用计划任务使用缓存管理器清除所有缓存。
@Component
public class ClearCacheTask {
@Autowired
private CacheManager cacheManager;
@Scheduled(fixedRateString = "${clear.all.cache.fixed.rate}", initialDelayString = "${clear.all.cache.init.delay}") // reset cache every hr, with delay of 1hr after app start
public void reportCurrentTime() {
cacheManager.getCacheNames().parallelStream().forEach(name -> cacheManager.getCache(name).clear());
}
}
Gets the job done.
完成工作。
回答by Kt Mack
Below evictCache method evicts fooCache using @CacheEvict annotation.
下面的 evictCache 方法使用 @CacheEvict 注释驱逐 fooCache。
public class FooService {
@Autowired
private FooRespository repository;
@Cacheable("fooCache")
public List<Foo> findAll() {
return repository.findAll();
}
@CacheEvict(value="fooCache",allEntries=true)
public void evictCache() {
LogUtil.log("Evicting all entries from fooCache.");
}
}
