如何删除缓存中的条目

Question

我正在使用 Spring 缓存。如果在适当的时候满足特定条件，我想删除缓存中的单个条目。

   @Cacheable(value = "statusEligibility", key = "#customerId")
   @GetMapping
   public CustomerStatusDTO getCustomerStatus(@PathVariable String customerId) {

  Customer customer = cusomterPort.getAccount(customerId);
  Status status = service.getStatus(customer);

  //Logic:
  //If status equals required then forward call to service to assert it. then delete the account from cache
  //else return not_required
  if (status.equals(Cons.REQUIRED)) {
     /.../
  } else {
     /.../
  }

}

如果客户对象满足 if 语句中的条件，我将如何从缓存中删除它？

Answer 1

首先看一下@CacheEvict注解：

https://docs.spring.io/spring/docs/5.1.7.RELEASE/spring-framework-reference/integration.html#cache-annotations-evict)

然后，看看“条件”缓存：

https://docs.spring.io/spring/docs/5.1.7.RELEASE/spring-framework-reference/integration.html#cache-annotations-cacheable-condition

@CacheEvict 有许多与@Cacheable 相同的属性：

https://docs.spring.io/spring/docs/current/javadoc-api/org/springframework/cache/annotation/CacheEvict.html

希望这会有所帮助！