Java 自填充缓存现有缓存问题（Spring 4，EhCache 2.10.3）

我有一个项目设置（这里的代码片段来自我在GitHub上创建的一个演示项目），其中在ehcache配置（ehcache.xml）中声明了原始eh缓存

<bean id="springCacheManager" class="org.springframework.cache.ehcache.EhCacheCacheManager">
    <property name="cacheManager" ref="cacheManager"/>
</bean>

<!--Creating a decorated cache instance using the raw cache cinfigured in ehcache.xml -->
<bean id="alphabetDescriptionCache" class="org.springframework.cache.ehcache.EhCacheFactoryBean">
    <property name="cacheManager" ref="cacheManager"/>
    <property name="cacheName" value="alphabet-description-cache"/>
    <property name="cacheEntryFactory" ref="alphabetDescriptionCacheEntryFactory"/>
</bean>

<bean id="alphabetDescriptionCacheEntryFactory" class="com.marwals.ashish.issues.selfpopulatingcache.AlphabetDescriptionCacheEntryFactory" />

你知道这里有什么问题吗？调试代码发现，对于同一个原始缓存，我有两个不同的缓存实例，然后EhCache的缓存管理器将其作为错误引发

<bean id="springCacheManager" class="org.springframework.cache.ehcache.EhCacheCacheManager">
    <property name="cacheManager" ref="cacheManager"/>
</bean>

<!--Creating a decorated cache instance using the raw cache cinfigured in ehcache.xml -->
<bean id="alphabetDescriptionCache" class="org.springframework.cache.ehcache.EhCacheFactoryBean">
    <property name="cacheManager" ref="cacheManager"/>
    <property name="cacheName" value="alphabet-description-cache"/>
    <property name="cacheEntryFactory" ref="alphabetDescriptionCacheEntryFactory"/>
</bean>

<bean id="alphabetDescriptionCacheEntryFactory" class="com.marwals.ashish.issues.selfpopulatingcache.AlphabetDescriptionCacheEntryFactory" />

我创建了一个git回购协议，演示了这个问题：

<bean id="springCacheManager" class="org.springframework.cache.ehcache.EhCacheCacheManager">
    <property name="cacheManager" ref="cacheManager"/>
</bean>

<!--Creating a decorated cache instance using the raw cache cinfigured in ehcache.xml -->
<bean id="alphabetDescriptionCache" class="org.springframework.cache.ehcache.EhCacheFactoryBean">
    <property name="cacheManager" ref="cacheManager"/>
    <property name="cacheName" value="alphabet-description-cache"/>
    <property name="cacheEntryFactory" ref="alphabetDescriptionCacheEntryFactory"/>
</bean>

<bean id="alphabetDescriptionCacheEntryFactory" class="com.marwals.ashish.issues.selfpopulatingcache.AlphabetDescriptionCacheEntryFactory" />

---

谢谢

您在Spring配置中明确请求了共享缓存管理器

<bean id="springCacheManager" class="org.springframework.cache.ehcache.EhCacheCacheManager">
    <property name="cacheManager" ref="cacheManager"/>
</bean>

<!--Creating a decorated cache instance using the raw cache cinfigured in ehcache.xml -->
<bean id="alphabetDescriptionCache" class="org.springframework.cache.ehcache.EhCacheFactoryBean">
    <property name="cacheManager" ref="cacheManager"/>
    <property name="cacheName" value="alphabet-description-cache"/>
    <property name="cacheEntryFactory" ref="alphabetDescriptionCacheEntryFactory"/>
</bean>

<bean id="alphabetDescriptionCacheEntryFactory" class="com.marwals.ashish.issues.selfpopulatingcache.AlphabetDescriptionCacheEntryFactory" />

<bean id="cacheManager" class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean">
    <property name="cacheManagerName" value="self-populating-cache-issue-demo"/>
    <property name="shared" value="true"/> <!-- here -->
    <property name="acceptExisting" value="false"/>
    <property name="configLocation" value="classpath:/ehcache.xml"/>
</bean>

这意味着对于给定的配置，Ehcache将始终返回相同的

CacheManager

。在你的情况下（一般来说），你不想这样

<bean id="springCacheManager" class="org.springframework.cache.ehcache.EhCacheCacheManager">
    <property name="cacheManager" ref="cacheManager"/>
</bean>

<!--Creating a decorated cache instance using the raw cache cinfigured in ehcache.xml -->
<bean id="alphabetDescriptionCache" class="org.springframework.cache.ehcache.EhCacheFactoryBean">
    <property name="cacheManager" ref="cacheManager"/>
    <property name="cacheName" value="alphabet-description-cache"/>
    <property name="cacheEntryFactory" ref="alphabetDescriptionCacheEntryFactory"/>
</bean>

<bean id="alphabetDescriptionCacheEntryFactory" class="com.marwals.ashish.issues.selfpopulatingcache.AlphabetDescriptionCacheEntryFactory" />

---

只要将

shared

设置为

false

即可解决您的问题。

谢谢@Henri。我会试试这个。我的真实场景中有一组测试使用了测试spring上下文，而有一些测试使用了真实spring上下文。因此，在这里与一些人讨论之后，我意识到使用真实spring上下文的应该是声明的集成测试，并与surefire为运行单元测试而分叉的VM分开运行。一般来说，您不需要共享缓存管理器，因为您将有一个共享的spring应用程序上下文。这将提供一个共享缓存管理器。因此，无论您采取何种方式，都应该共享缓存管理器。

<bean id="springCacheManager" class="org.springframework.cache.ehcache.EhCacheCacheManager">
    <property name="cacheManager" ref="cacheManager"/>
</bean>

<!--Creating a decorated cache instance using the raw cache cinfigured in ehcache.xml -->
<bean id="alphabetDescriptionCache" class="org.springframework.cache.ehcache.EhCacheFactoryBean">
    <property name="cacheManager" ref="cacheManager"/>
    <property name="cacheName" value="alphabet-description-cache"/>
    <property name="cacheEntryFactory" ref="alphabetDescriptionCacheEntryFactory"/>
</bean>

<bean id="alphabetDescriptionCacheEntryFactory" class="com.marwals.ashish.issues.selfpopulatingcache.AlphabetDescriptionCacheEntryFactory" />