MongoDB Spring Data Repository - 缓存方法
[英]MongoDB Spring Data Repository - Cache methods
问题描述
I need to have calls to MongoDB cached using spring @Cacheable annotation: 
我需要使用spring @Cacheable注释调用MongoDB缓存：
public interface SiteRepository extends PagingAndSortingRepository<Site, String>{
@Cacheable
List<Site> findByStatus(Site.Status status);
}
Unfortunately, annotating any method in the interface with @Cacheable causes the following exception: 不幸的是，使用@Cacheable注释接口中的任何方法都会导致以下异常：
Nov 22, 2014 7:11:06 PM org.apache.catalina.core.ApplicationContext log SEVERE: StandardWrapper.Throwable org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'example': Injection of autowired dependencies failed;
I am looking for a way to cache calls to DB (which are quite expensive). 我正在寻找一种缓存DB调用的方法（这是非常昂贵的）。 Any idea? 任何的想法？
1 个解决方案
解决方案1
4 已采纳 2015-10-29 23:08:39
From the Spring documentation on caches: 从关于缓存的Spring 文档 ：
Spring recommends that you only annotate concrete classes (and methods of concrete classes) with the @Cache* annotation, as opposed to annotating interfaces .
Probably your cache configuration is colliding with the way that Spring creates implementations of your repository interfaces at runtime. 可能您的缓存配置与Spring在运行时创建存储库接口实现的方式相冲突。
You could review your caching configuration to make it play nice with spring data (see here for different caching configuration options). 您可以查看缓存配置，使其与spring数据一起使用（请参阅此处了解不同的缓存配置选项）。
Or, you could do this: 或者，你可以这样做：
public interface SiteRepository extends PagingAndSortingRepository<Site, String>{
List<Site> findByStatus(Site.Status status);
}
@Service
public class CachedSiteService {
@Autowired
private SiteRepository siteRepository;
@Cacheable("sites")
List<Site> findByStatus(Site.Status status) {
return siteRepository.findByStatus(status);
}
}
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