关键GemFire: Spring中的PDX序列化程序配置

Question

我已经创建了一个包含两个定位器、两个缓存服务器和一个“客户”复制区域的GemFire集群。(在服务器启动期间，域对象类被放置在类路径中)。

我能够运行一个Java程序(Peer)来加载集群中的"Customer“区域。现在我们要转到Spring，在这里我不知道如何配置PDX序列化和获取.

com.gemstone.gemfire.InternalGemFireException: java.io.NotSerializableException: com.gemfire.poc.DomainObjects.Customer

简单Java程序中的cache.xml .

<?xml version="1.0" encoding="UTF-8"?><cache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://schema.pivotal.io/gemfire/cache" xsi:schemaLocation="http://schema.pivotal.io/gemfire/cache http://schema.pivotal.io/gemfire/cache/cache-8.1.xsd" version="8.1" lock-lease="120" lock-timeout="60" search-timeout="300" is-server="false" copy-on-read="false">
 <pdx>
    <pdx-serializer>
      <class-name>
       com.gemstone.gemfire.pdx.ReflectionBasedAutoSerializer
      </class-name>
    <parameter name="classes">
      <string>com.gemfire.poc.DomainObjects.*</string>
    </parameter>
  </pdx-serializer>
 </pdx>
    <region name="Customer" refid="REPLICATE">
    <region-attributes refid="REPLICATE" scope="distributed-no-ack"> 
     <cache-loader>
        <class-name>com.citigroup.pulse.pt.gemfire.poc.clientserver.SimpleCacheLoader</class-name>
    </cache-loader>
</region-attributes>
    </region>
</cache>

spring-context.xml在春季启动应用程序..。

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:gfe="http://www.springframework.org/schema/gemfire"
       xmlns:util="http://www.springframework.org/schema/util"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="
                http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/gemfire http://www.springframework.org/schema/gemfire/spring-gemfire.xsd
                http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd
                http://www.springframework.org/schema/data/gemfire 
                           http://www.springframework.org/schema/data/gemfire/spring-data-gemfire.xsd">

    <util:properties id="gemfireProperties">
        <prop key="log-level">config</prop>
        <prop key="locators">hostA[10334],hostB[10334]</prop>
    </util:properties>


    <bean id="mappingPdxSerializer" class="com.gemstone.gemfire.pdx.ReflectionBasedAutoSerializer"/>

    <gfe:cache use-bean-factory-locator="false" properties-ref="gemfireProperties" use-cluster-configuration="true" pdx-serializer-ref="mappingPdxSerializer" />

    <gfe:replicated-region id="Customer" ignore-if-exists="true">       
    </gfe:replicated-region>


</beans>

有人能帮我解决序列化问题吗？

Caused by: com.gemstone.gemfire.InternalGemFireException: java.io.NotSerializableException: com.gemfire.poc.DomainObjects.Customer
    at com.gemstone.gemfire.distributed.internal.DistributionManager.putOutgoing(DistributionManager.java:1954)
    at com.gemstone.gemfire.internal.cache.DistributedCacheOperation.distribute(DistributedCacheOperation.java:476)
    at com.gemstone.gemfire.internal.cache.AbstractUpdateOperation.distribute(AbstractUpdateOperation.java:65)
    at com.gemstone.gemfire.internal.cache.DistributedRegion.distributeUpdate(DistributedRegion.java:519)
    at com.gemstone.gemfire.internal.cache.DistributedRegion.basicPutPart3(DistributedRegion.java:500)
    at com.gemstone.gemfire.internal.cache.AbstractRegionMap.basicPut(AbstractRegionMap.java:3052)
    at com.gemstone.gemfire.internal.cache.LocalRegion.virtualPut(LocalRegion.java:5838)

准确地说，如何在ReflectionBasedAutoSerializer标签中添加spring-data-gemfire的“类”参数？

当从区域检索值时PDX反序列化异常：

com.gemstone.gemfire.ToDataException: PdxSerializer failed when calling toData on class javax.management.Notification
    at com.gemstone.gemfire.internal.InternalDataSerializer.writePdx(InternalDataSerializer.java:3130)
    at com.gemstone.gemfire.internal.InternalDataSerializer.writeUserObject(InternalDataSerializer.java:1520)
    at com.gemstone.gemfire.internal.InternalDataSerializer.writeWellKnownObject(InternalDataSerializer.java:1416)
    at com.gemstone.gemfire.internal.InternalDataSerializer.basicWriteObject(InternalDataSerializer.java:2208)
    at com.gemstone.gemfire.DataSerializer.writeObject(DataSerializer.java:3181)
    at com.gemstone.gemfire.internal.util.BlobHelper.serializeToBlob(BlobHelper.java:50)
    at com.gemstone.gemfire.internal.util.BlobHelper.serializeToBlob(BlobHelper.java:38)
    at com.gemstone.gemfire.internal.cache.UpdateOperation$UpdateMessage.toData(UpdateOperation.java:492)
    at com.gemstone.gemfire.internal.InternalDataSerializer.invokeToData(InternalDataSerializer.java:2407)
    at com.gemstone.gemfire.internal.InternalDataSerializer.writeDSFID(InternalDataSerializer.java:1378)
    at com.gemstone.gemfire.internal.tcp.MsgStreamer.writeMessage(MsgStreamer.java:239)
    at com.gemstone.gemfire.distributed.internal.direct.DirectChannel.sendToMany(DirectChannel.java:458)
    at com.gemstone.gemfire.distributed.internal.direct.DirectChannel.sendToOne(DirectChannel.java:310)
    at com.gemstone.gemfire.distributed.internal.direct.DirectChannel.send(DirectChannel.java:696)
    at com.gemstone.gemfire.distributed.internal.membership.jgroup.JGroupMembershipManager.directChannelSend(JGroupMembershipManager.java:2929)
    at com.gemstone.gemfire.distributed.internal.membership.jgroup.JGroupMembershipManager.send(JGroupMembershipManager.java:3163)
    at com.gemstone.gemfire.distributed.internal.DistributionChannel.send(DistributionChannel.java:79)
    at com.gemstone.gemfire.distributed.internal.DistributionManager.sendOutgoing(DistributionManager.java:3907)
    at com.gemstone.gemfire.distributed.internal.DistributionManager.sendMessage(DistributionManager.java:3948)
    at com.gemstone.gemfire.distributed.internal.DistributionManager.putOutgoing(DistributionManager.java:1951)
    at com.gemstone.gemfire.internal.cache.DistributedCacheOperation.distribute(DistributedCacheOperation.java:476)
    at com.gemstone.gemfire.internal.cache.AbstractUpdateOperation.distribute(AbstractUpdateOperation.java:65)
    at com.gemstone.gemfire.internal.cache.DistributedRegion.distributeUpdate(DistributedRegion.java:519)
    at com.gemstone.gemfire.internal.cache.DistributedRegion.basicPutPart3(DistributedRegion.java:500)
    at com.gemstone.gemfire.internal.cache.ProxyRegionMap.basicPut(ProxyRegionMap.java:242)
    at com.gemstone.gemfire.internal.cache.LocalRegion.virtualPut(LocalRegion.java:5838)
    at com.gemstone.gemfire.internal.cache.DistributedRegion.virtualPut(DistributedRegion.java:387)
    at com.gemstone.gemfire.internal.cache.LocalRegionDataView.putEntry(LocalRegionDataView.java:118)
    at com.gemstone.gemfire.internal.cache.LocalRegion.basicPut(LocalRegion.java:5228)
    at com.gemstone.gemfire.internal.cache.LocalRegion.validatedPut(LocalRegion.java:1599)
    at com.gemstone.gemfire.internal.cache.LocalRegion.put(LocalRegion.java:1582)
    at com.gemstone.gemfire.internal.cache.AbstractRegion.put(AbstractRegion.java:327)
    at com.gemstone.gemfire.management.internal.ManagementResourceRepo.putEntryInLocalNotificationRegion(ManagementResourceRepo.java:169)
    at com.gemstone.gemfire.management.internal.NotificationHub$NotificationHubListener.handleNotification(NotificationHub.java:193)
    at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor$ListenerWrapper.handleNotification(DefaultMBeanServerInterceptor.java:1754)
    at javax.management.NotificationBroadcasterSupport.handleNotification(NotificationBroadcasterSupport.java:275)
    at javax.management.NotificationBroadcasterSupport$SendNotifJob.run(NotificationBroadcasterSupport.java:352)
    at javax.management.NotificationBroadcasterSupport$1.execute(NotificationBroadcasterSupport.java:337)
    at javax.management.NotificationBroadcasterSupport.sendNotification(NotificationBroadcasterSupport.java:248)
    at com.gemstone.gemfire.management.internal.beans.ManagementAdapter.handleRegionRemoval(ManagementAdapter.java:879)
    at com.gemstone.gemfire.management.internal.beans.ManagementListener.handleEvent(ManagementListener.java:123)
    at com.gemstone.gemfire.distributed.internal.InternalDistributedSystem.notifyResourceEventListeners(InternalDistributedSystem.java:2252)
    at com.gemstone.gemfire.distributed.internal.InternalDistributedSystem.handleResourceEvent(InternalDistributedSystem.java:506)
    at com.gemstone.gemfire.internal.cache.LocalRegion.basicDestroyRegion(LocalRegion.java:6642)
    at com.gemstone.gemfire.internal.cache.DistributedRegion.basicDestroyRegion(DistributedRegion.java:1957)
    at com.gemstone.gemfire.internal.cache.LocalRegion.close(LocalRegion.java:2219)
    at org.springframework.data.gemfire.RegionFactoryBean.destroy(RegionFactoryBean.java:529)
    at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:272)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:578)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:554)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:961)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:523)
    at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.destroySingletons(FactoryBeanRegistrySupport.java:230)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingletons(DefaultListableBeanFactory.java:968)
    at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1032)
    at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1008)
    at org.springframework.context.support.AbstractApplicationContext$2.run(AbstractApplicationContext.java:929)
Caused by: org.springframework.data.mapping.model.MappingException: Could not write value for property protected transient java.lang.Object java.util.EventObject.source
    at org.springframework.data.gemfire.mapping.MappingPdxSerializer$2.doWithPersistentProperty(MappingPdxSerializer.java:188)
    at org.springframework.data.gemfire.mapping.MappingPdxSerializer$2.doWithPersistentProperty(MappingPdxSerializer.java:173)
    at org.springframework.data.mapping.model.BasicPersistentEntity.doWithProperties(BasicPersistentEntity.java:309)
    at org.springframework.data.gemfire.mapping.MappingPdxSerializer.toData(MappingPdxSerializer.java:173)
    at com.gemstone.gemfire.internal.InternalDataSerializer.writePdx(InternalDataSerializer.java:3075)
    ... 56 more
Caused by: com.gemstone.gemfire.pdx.PdxFieldAlreadyExistsException: The field "source" already exists.
    at com.gemstone.gemfire.pdx.internal.PdxType.addField(PdxType.java:262)
    at com.gemstone.gemfire.pdx.internal.PdxWriterImpl.updateMetaData(PdxWriterImpl.java:858)
    at com.gemstone.gemfire.pdx.internal.PdxWriterImpl.updateMetaData(PdxWriterImpl.java:851)
    at com.gemstone.gemfire.pdx.internal.PdxWriterImpl.writeObject(PdxWriterImpl.java:303)
    at com.gemstone.gemfire.pdx.internal.PdxWriterImpl.writeField(PdxWriterImpl.java:705)
    at com.gemstone.gemfire.pdx.internal.PdxWriterImpl.writeField(PdxWriterImpl.java:625)
    at org.springframework.data.gemfire.mapping.MappingPdxSerializer$2.doWithPersistentProperty(MappingPdxSerializer.java:184)
    ... 60 more

Answer 1

这里有几个选项，还有一些建议。

1)首先，我不会使用Pivotal的o.a.g.pdx.ReflectionBasedAutoSerializer。相反，SDG有一个基于Spring的映射基础结构(即PdxSerializer )的更加健壮的o.s.d.g.mapping.MappingPdxSerializer实现。

此外，SDG的MappingPdxSerializer允许您在实体字段/属性逐个案例的基础上进行PdxSerializer's。想象一下，如果您的Customer类引用了一个复杂的Address类，并且该类有特殊的序列化需求。

此外，SDG的MappingPdxSerializer可以处理瞬态和只读属性.

最后，您不必为正确识别需要序列化的应用程序域模型类型而处理任何繁琐/复杂的Regex。

2)其次，您可以利用Spring的JavaConfig和SDG的新 基于注释的配置模型来配置关键的GemFire PDX系列化，就像这样.

@SpringBootApplication
@PeerCacheApplication
@EnablePdx(..)
class MySpringBootApacheGeodeApplication {
  ...
}

也就是说，使用SDG @EnablePdx注释。

关于上述#1和#2的更多详细信息可以获得这里和这里。

当然，后者在使用关键的GemFire 9.x+和Spring Data GemFire Kay (2.0+)时更适用。从您的XML (即1.9.x.RELEASE)，包)配置的com.gemstone.gemfire.pdx.ReflectionBasedAutoSerializer包中判断，您似乎正在使用关键的GemFire 8.2.x和Spring Ingalls (或者是com.gemstone.gemfire？

但是，如果您坚持使用XML进行配置，或者需要使用XML，那么您可以执行以下操作.

<beans ...>

  <bean id="mappingPdxSerializer" class="org.springframework.data.gemfire.mapping.MappingPdxSerializer"/>

  <gfe:cache pdx-serializer-ref="mappingPdxSerializer" .../>

</beans>

而且，如果您真的想使用Pivotal的ReflectionBasedAutoSerializer，那么您可以找到它在SDG测试套件中使用的例子。为了实例。

我还在我的弹簧-双簧管试验项目/回购(这是一个相当混乱的，我不再维护这个回购，作为警告)更多的例子。示例这里，使用Java与GemFire的API 这里、这里、这里，其中还显示了SDG的MappingPdxSerializer的使用 (通过比较)等等。在我的回覆过程中，有许多例子。

希望这能有所帮助！

干杯，-John