java Spring 5@Cacheable不工作，即使侦听器调用在堆栈上

Question

我的缓存注释正在注册，该注释将显示在跟踪日志中：

2019-11-04 23:55:52,229 TRACE AnnotationCacheOperationSource:102 - **Adding cacheable method 'getMaximumSimilarItems'** with attribute: [Builder[public java.lang.Integer com.quote.manager.impl.SystemConfigManagerImpl.getMaximumSimilarItems()] caches=[attachments] | key='#root.methodName' | keyGenerator='' | cacheManager='' | cacheResolver='' | condition='' | unless='' | sync='false']

@Cacheable(value = "attachments", key = "#root.methodName")
    public Integer getMaximumSimilarItems() {

        logger.info("GetMax");
        SystemConfig systemConfig = systemConfigDao.getSystemConfig();

        Integer maxSimilarItems = systemConfig.getMaximumSimilarItems();

        if(maxSimilarItems != null) {
            return maxSimilarItems;
        }

        return 20;
    }

还有调试的时候,，

我在堆栈上看到调用和调用后的缓存拦截器。但仍然没有缓存任何内容。我尝试了多种缓存实现

有没有关于在Spring的缓存实现中设置调试点以找出它为什么不缓存的想法

我尝试了XML-config和Java-config@EnableCaching

<bean id="cacheManager" class="org.springframework.cache.jcache.JCacheCacheManager">
        <property name="cacheManager">
        <bean class="org.springframework.cache.jcache.JCacheManagerFactoryBean" 
            p:cacheManagerUri="classpath:ehcache.xml" />
        </property>
    </bean> 

<cache:annotation-driven  cache-manager="cacheManager" />


2019-11-05 11:16:51,370  INFO Eh107CacheManager:378 - Registering Ehcache MBean javax.cache:type=CacheStatistics,CacheManager=file./home/work/workspace-quotes/.metadata/.plugins/org.eclipse.wst.server.core/tmp7/wtpwebapps/app/WEB-INF/classes/ehcache.xml,Cache=attachments
2019-11-05 11:16:51,756  INFO Eh107CacheManager:378 - Registering Ehcache MBean javax.cache:type=CacheStatistics,CacheManager=file./home/work/workspace-quotes/.metadata/.plugins/org.eclipse.wst.server.core/tmp7/wtpwebapps/app/WEB-INF/classes/ehcache.xml,Cache=attachments

我看到了ehCache中定义的缓存。当应用程序启动时，xml也在注册，因此缓存正在启动

<ehcache:config
  xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'
  xmlns:ehcache='http://www.ehcache.org/v3'
  xsi:schemaLocation="http://www.ehcache.org/v3 http://www.ehcache.org/schema/ehcache-core-3.1.xsd">

  <ehcache:cache alias="attachments">

    <ehcache:resources>
      <ehcache:heap unit="entries">100</ehcache:heap>
      <ehcache:offheap unit="MB">1</ehcache:offheap>
    </ehcache:resources>
  </ehcache:cache>
</ehcache:config>

Answer 1

所以问题是，在初始化上下文之前，我调用@Cacheable函数太早了。有一次我给它打了电话，它工作得很好

我补充说：

 implements Runnable, ApplicationListener<ContextRefreshedEvent>  {

及

@Override
public void onApplicationEvent(ContextRefreshedEvent arg0) {

String name = arg0.getApplicationContext().getDisplayName();

if (name.contains("Root")) {
    // ANY CODE That requires @Cacheable is called HERE!.. 
    // Will not work if ran before this, such as inside @PostConstruct

    }
}

“根”检查有点像黑客，只在根事件完成时调用，否则会被调用两次。我不知道如何区分这些事件