如何测试Spring-Cache？

Question

我正在尝试为项目添加缓存支持，以便每次需要静态数据时都缓存静态数据并且不联系数据库

我的applicationContext.xml样子

<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
       xmlns:cache="http://www.springframework.org/schema/cache"
       xmlns:p="http://www.springframework.org/schema/p"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context.xsd
       http://www.springframework.org/schema/cache
       http://www.springframework.org/schema/cache/spring-cache-3.1.xsd">
    <context:component-scan base-package="com.yahoo.comma"/>
    <bean id="liquibase" class="liquibase.integration.spring.SpringLiquibase">
        <property name="dataSource" ref="dataSource"/>
        <property name="changeLog" value="classpath:liquibase/changelog.xml"/>
        <property name="defaultSchema" value="pryme"/>
    </bean>
    <cache:annotation-driven/>

    <!-- generic cache manager -->
    <bean id="cacheManager" class="org.springframework.cache.support.SimpleCacheManager">
        <property name="caches">
            <set>
                <bean class="org.springframework.cache.concurrent.ConcurrentMapCacheFactoryBean" p:name="targetingAttributes"/>
            </set>
        </property>
    </bean>
</beans>

我的AgeRepository班级看起来像

@Component
@Transactional
public class AgeRepositoryService {
    private static final Logger LOGGER = LoggerFactory.getLogger(AgeRepositoryService.class);
    private AgeRepository ageRepository;

    @SuppressWarnings("UnusedDeclaration")
    public AgeRepositoryService() {
    }

    @Autowired
    public AgeRepositoryService(@Nonnull final AgeRepository ageRepository) {
        this.ageRepository = ageRepository;
    }

    @Nonnull
    public Age save(@Nonnull final Age age) {
        LOGGER.debug("adding age {}", age);
        return ageRepository.saveAndFlush(age);
    }

    @Cacheable("targetingAttributes")
    @Nonnull
    public List<Age> getAges() {
        return ageRepository.findAll();
    }
}

我有集成测试，该测试通过击中REST端点来接收数据。

问题
但是，如何测试缓存确实按预期工作？有什么建议吗？

Answer 1

您可以只记录每个对象的创建。不应再次创建缓存的对象。

public Age(){
    System.out.println("Age created"); // or use static int and count instances
}

另一个选择是创建您自己的ConcurrentMapCacheFactoryBean。你可以在github上找到实现

public class MYConcurrentMapCacheFactoryBean implements FactoryBean<ConcurrentMapCache>, BeanNameAware, InitializingBean{

   // code from github
   public String toString(){
       // todo show content of ConcurrentMapCache 
   }
}

最后将 bean 定义更改applicationContext.xml为package.MYConcurrentMapCacheFactoryBean

我认为显示缓存内容的最佳方法是使用 ApplicationContext 获取缓存实例：

@Autowired
private ApplicationContext appContext;

public void printCacheContent(){

     SimpleCacheManager cacheMng = (SimpleCacheManager) appContext.getBean("cacheManager");
     System.out.println(cacheMng.loadCaches().toString());
}