在Spring中使用@Cacheable和@CacheEvict [英] Using @Cacheable and @CacheEvict in Spring

问题描述

我开发了一种使用 @Cacheable 批注的方法。代码是：

I developed a method that use @Cacheable annotation. The code is:

   @Cacheable(value="reporties" , key="{#root.methodName,#manager.name}")
   public List<Employee> getReportiesForManager(Employee manager){
     // code to fetch reporties its a Spring JDBC call
   }

现在，我想在某些事件后退出此缓存：

Now, I want to evict this cache after some events:

• 与经理相关的某些报告已更新（添加或删除）。

此后，应该清除与管理器相关的缓存，这样，应用程序将获取新数据，而不是使用该缓存中的现有数据。为此，我开发了以下方法：

After that, the cache related with the manager should be evicted, in that way, the application will get new data instead of using the existing one in that cache. I developed the following method for that:

@CacheEvict(value="reporties",key="{#name}")
public void evictReportiesCache(String name){}

我在更新Manager和它的报告。但是，这是间歇性的，因此我不确定这是否是驱逐缓存的正确方法。另外，可缓存对象还使用＃root.methodName 作为密钥的一部分。

I call inside the method which updates the relations of the Manager and its reporties. However, this one works intermittently and I am not sure if that's the correct way to evict cache. Also the Cacheable uses #root.methodName as part of key.

有人可以帮助我进行此缓存逐出吗？

Can someone please help me with this cache eviction?

推荐答案

您可以将缓存视为 Map< key，value> 。

每次调用带有@Cacheable批注的方法时，都会在Map中写入与定义为键的值相关的值。

Every time you invoke a method with the @Cacheable annotation you write in that Map a value associated to what you define as key.

每次调用带有@CacheEvict批注的方法时，都会删除与键关联的值。您还可以删除地图中的所有条目。

Every time you invoke a method with the @CacheEvict annotation you delete the value associated with the key. You can also delete all the entries in the Map.

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