java Spring cache@cacheexecute匹配列表中的键？

Question

我正在使用Spring缓存，并试图通过一个键（id）列表逐出缓存

@CacheEvict(value="cacheName",key=?, condition=? )
public void deleteByIds(List<Integer> ids){...}

我怎样才能做到这一点

Answer 1

• @CacheEvict

Annotation indicating that a method (or all methods on a class) triggers a cache evict operation.

• 价值观

Names of the caches in which method invocation results are stored.

• 条件

Expression used for making the method caching conditional.

• 钥匙

root.method, root.target, and root.caches for references to the method, target object, and affected cache(s) respectively.

解决方案针对您的问题： 假设列表中的每个对象都被缓存到其中，例如cacheName=“entities”，对于键，您可以使用实体ID（整型值的字符串表示形式），您应该编写第二个方法来退出缓存

public void deleteByIds(List<Intiger> intigers){
 for(Intigier i : intigers){
  deleteEntity(i.toString());
 }
}

@CacheEvict(cacheName = "entities", key="entityId", condition="entityId!=null")
private void deleteEntity(String entityId){
 //processing : for ex delete from the database and also remove from cache
}