在 Tomcat 集群中使用 ehcache 进行缓存复制

Question

我为 3 个不同的 tomcat 实例提供了以下 ehcache 配置。

我的假设是，在每个 ehcache 中，我们应该将所有其他节点定义为提供者，并将当前节点定义为侦听器。

我们应该在每个 ehcache.xml 中定义我们所有的缓存吗？如果是，我们是否也应该将这些名称添加到 RMI 地址中？ 我像这样定义了ehcaches。其中两个缓存的复制工作正常，但对于其他两个缓存它不起作用（activityCache 和分类缓存）。当然，这应该取决于他们的实现，但此时，我想确保 ehcache 配置正确。

<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:noNamespaceSchemaLocation="ehcache.xsd">

 <cache name="activityCache"
           maxElementsInMemory="30"
           maxElementsOnDisk="100000"
           eternal="true"
           overflowToDisk="true"
           diskPersistent="true"
           diskSpoolBufferSizeMB="20"
           timeToIdleSeconds="50"
           timeToLiveSeconds="5"
           memoryStoreEvictionPolicy="LFU">

            <bootstrapCacheLoaderFactory class = "net.sf.ehcache.distribution.RMIBootstrapCacheLoaderFactory" properties = "bootstrapAsynchronously=false, maximumChunkSizeBytes=5000000"/>

            <cacheEventListenerFactory class = "net.sf.ehcache.distribution.RMICacheReplicatorFactory" properties="replicateAsynchronously=true, asynchronousReplicationIntervalMillis=100"/>

           </cache>

         <cache name="featureCache"
           maxElementsInMemory="30"
           maxElementsOnDisk="100000"
           eternal="true"
           overflowToDisk="true"
           diskPersistent="true"
           diskSpoolBufferSizeMB="20"
           timeToIdleSeconds="50"
           timeToLiveSeconds="5"
           memoryStoreEvictionPolicy="LFU">            

            <bootstrapCacheLoaderFactory class = "net.sf.ehcache.distribution.RMIBootstrapCacheLoaderFactory" properties = "bootstrapAsynchronously=false, maximumChunkSizeBytes=5000000"/>

            <cacheEventListenerFactory class = "net.sf.ehcache.distribution.RMICacheReplicatorFactory" properties="replicateAsynchronously=true, asynchronousReplicationIntervalMillis=100"/>

           </cache> 

        <cache name="classificationCache"
           maxElementsInMemory="30"
           maxElementsOnDisk="100000"
           eternal="true"
           overflowToDisk="true"
           diskPersistent="true"
           diskSpoolBufferSizeMB="20"
           timeToIdleSeconds="50"
           timeToLiveSeconds="5"
           memoryStoreEvictionPolicy="LFU">    

            <bootstrapCacheLoaderFactory class = "net.sf.ehcache.distribution.RMIBootstrapCacheLoaderFactory" properties = "bootstrapAsynchronously=false, maximumChunkSizeBytes=5000000"/>

            <cacheEventListenerFactory class = "net.sf.ehcache.distribution.RMICacheReplicatorFactory" properties="replicateAsynchronously=true, asynchronousReplicationIntervalMillis=100"/>

           </cache>

    <cache name="userGroupCache"
           maxElementsInMemory="30"
           maxElementsOnDisk="100000"
           eternal="true"
           overflowToDisk="true"
           diskPersistent="true"
           diskSpoolBufferSizeMB="20"
           timeToIdleSeconds="50"
           timeToLiveSeconds="5"
           memoryStoreEvictionPolicy="LFU">

            <bootstrapCacheLoaderFactory class = "net.sf.ehcache.distribution.RMIBootstrapCacheLoaderFactory" properties = "bootstrapAsynchronously=false, maximumChunkSizeBytes=5000000"/>

            <cacheEventListenerFactory class = "net.sf.ehcache.distribution.RMICacheReplicatorFactory" properties="replicateAsynchronously=true, asynchronousReplicationIntervalMillis=100"/>

           </cache>                

 <cacheManagerPeerProviderFactory class = "net.sf.ehcache.distribution.RMICacheManagerPeerProviderFactory" properties = "peerDiscovery=manual, rmiUrls=//localhost:40002/activityCache|//localhost:40002/userGroupCache|//localhost:40002/featureCache|//localhost:40002/classificationCache//localhost:40003/activityCache|//localhost:40003/userGroupCache|//localhost:40003/featureCache|//localhost:40003/classificationCache"/>

<cacheManagerPeerListenerFactory class = "net.sf.ehcache.distribution.RMICacheManagerPeerListenerFactory" properties = "hostName=localhost, port=40001, socketTimeoutMillis=2000"/>

</ehcache>

这里还有缓存和cahchSevices的定义：

     <bean id="featureCache" parent="abstractOptionalCache">
        <property name="maxElementsInMemory" value="${cache.feature.maxMemoryElements}"/>
        <property name="maxElementsOnDisk" value="${cache.feature.maxDiskElements}"/> 
        <property name="overflowToDisk" value="${cache.feature.useDisk}"/>
      </bean>

      <bean id="featureCacheService" parent="abstractService" class="com.service.business.cache.impl.ehcache.EHcacheFeatureCacheService">
        <property name="cache"  ref="featureCache"/>
        <property name="enabled" value="${cache.feature.enable}"/>
      </bean> 

      <bean id="activityCache" parent="abstractMandatoryCache">
        <property name="cacheManager" ref="cacheManager"/>
        <property name="maxElementsInMemory" value="${cache.activity.maxMemoryElements}"/>
      </bean>

       <bean id="activityCacheService" parent="abstractService" class="com.service.business.cache.impl.ehcache.EHcacheActivityCacheService">
        <property name="cache"  ref="activityCache"/>
      </bean> 

      <bean id="classificationCache" parent="abstractOptionalCache">
        <property name="cacheManager" ref="cacheManager"/>
        <property name="maxElementsInMemory" value="${cache.classification.maxMemoryElements}"/>
        <property name="maxElementsOnDisk" value="${cache.classification.maxDiskElements}"/> 
        <property name="overflowToDisk" value="${cache.classification.useDisk}"/>
      </bean>

      <bean id="classificationCacheService" parent="abstractService" class="com.service.business.cache.impl.ehcache.EHcacheClassificationCacheService">
        <property name="cache"     ref="classificationCache" />
        <property name="enabled" value="${cache.classification.enable}"/>
      </bean>

        <bean id="userGroupCache" parent="abstractOptionalCache">
    <property name="cacheManager" ref="cacheManager"/>
    <property name="maxElementsInMemory" value="${cache.userGroup.maxMemoryElements}"/>
    <property name="maxElementsOnDisk" value="${cache.userGroup.maxDiskElements}"/> 
    <property name="overflowToDisk" value="${cache.userGroup.useDisk}"/>
  </bean>

  <bean id="userGroupCacheService" parent="abstractService" class="com.service.business.cache.impl.ehcache.EHcacheUserGroupCacheService">
    <property name="cache"     ref="userGroupCache" />
    <property name="enabled" value="${cache.userGroup.enable}"/>
  </bean> 

我会根据您的要求提供更多信息。

提前谢谢你。

Answer 1

你做得很好，但只是错了

rmiUrls=//localhost:40002/activityCache|//localhost:40002/userGroupCache|//localhost:40002/featureCache|//localhost:40002/classificationCache//localhost:40003/activityCache|//localhost:40003/userGroupCache|//localhost:40003/featureCache|//localhost:40003/classificationCache

你错过了分类和活动缓存之间的|

//localhost:40002/classificationCache//localhost:40003/activityCache

这就是这两个缓存都不起作用的原因！