java - Spring缓存@CacheEvict匹配列表中的键？

Question

我正在使用 Spring 缓存并尝试通过键(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.

• 缓存名称或值

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

• 条件

Expression used for making the method caching conditional.

• key

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

您的问题的解决方案:假设列表中的每个对象都被缓存到，例如cacheName =“entities”，并且对于键，您可以使用实体ID(它是整数值的字符串表示形式)，您应该编写第二种方法来逐出缓存.

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
}