Question

我正在将自定义对象（帐户）添加到Cache中，然后尝试通过Function.execute（）方法访问该对象。

但是它抛出org.apache.geode.pdx.internal.PdxInstanceImpl cannot be cast to com.sas.cpm.model.Account。

自定义对象Account.java

public class Account implements PdxSerializable, Declarable{

public Account() {
          super();
          // TODO Auto-generated constructor
     }

@Override
       public void fromData(PdxReader pr) {…..}

@Override
       public void toData(PdxWriter pw) {… }
}

客户代码：

ClientCache cache = new ClientCacheFactory()
            .addPoolLocator("localhost", 10334).set("log-level", "INFO").create();

    // create a local region that matches the server region
// Account is the domain object 
    Region<String, Account> region =
        cache.<String, Account>createClientRegionFactory(ClientRegionShortcut.CACHING_PROXY)
            .create("testRegion");

feedData(region);   //add Account object to region
Execution execution = FunctionService.onRegion(region);
ResultCollector<Integer, List> rc = execution.execute("UpdateCost");//.ID);//com.sas.cpm.geode

函数类：UpdateCost.java

public class UpdateCost implements Function{
   @Override
            public void execute(FunctionContext context) {

                 RegionFunctionContext regionContext = (RegionFunctionContext) context;
                 Region<String, Account> region = regionContext.getDataSet();
                for ( Map.Entry<String, Account> entry : region.entrySet() ) {
                        Account account = entry.getValue();                   /// THIS LINE GIVES THE ERROR
                }

        }

 }

错误：

线程“主”中的异常org.apache.geode.cache.execute.FunctionException：org.apache.geode.cache.client.ServerOperationException：dsinsbb01ina4（46560：loner）上的远程服务器：59343：2f7e3885：执行远程executeRegionFunction 在org.apache.geode.internal.cache.execute.ServerRegionFunctionExecutor.executeOnServer（ServerRegionFunctionExecutor.java:229）在org.apache.geode.internal.cache.execute.ServerRegionFunctionExecutor.executeFunction（ServerRegionFunctionExecutor.java:178）在org.apache.geode.internal.cache.execute.ServerRegionFunctionExecutor.execute（ServerRegionFunctionExecutor.java:379）在geodeproject1.Example.funcUpdateExec（Example.java:186）在geodeproject1.Example.main（Example.java:68）由以下原因引起：org.apache.geode.cache.client.ServerOperationException：dsinsbb01ina4上的远程服务器（46560：loner）：59343：2f7e3885：执行远程executeRegionFunction时在org.apache.geode.cache.client.internal.ExecuteRegionFunctionOp $ ExecuteRegionFunctionOpImpl.processResponse（ExecuteRegionFunctionOp.java:606）处在org.apache.geode.cache.client.internal.AbstractOp.processResponse（AbstractOp.java:225）在org.apache.geode.cache.client.internal.AbstractOp.attemptReadResponse（AbstractOp.java:198）在org.apache.geode.cache.client.internal.AbstractOp.attempt（AbstractOp.java:386）在org.apache.geode.cache.client.internal.ConnectionImpl.execute（ConnectionImpl.java:269）在org.apache.geode.cache.client.internal.pooling.PooledConnection.execute（PooledConnection.java:325）在org.apache.geode.cache.client.internal.OpExecutorImpl.executeWithPossibleReAuthentication（OpExecutorImpl.java:892）在org.apache.geode.cache.client.internal.OpExecutorImpl.execute（OpExecutorImpl.java:171）在org.apache.geode.cache.client.internal.PoolImpl.execute（PoolImpl.java:772）在org.apache.geode.cache.client.internal.ExecuteRegionFunctionOp.execute（ExecuteRegionFunctionOp.java:162）在org.apache.geode.cache.client.internal.ServerRegionProxy.executeFunction（ServerRegionProxy.java:732）在org.apache.geode.internal.cache.execute.ServerRegionFunctionExecutor.executeOnServer（ServerRegionFunctionExecutor.java:220） ...另外4个造成原因：org.apache.geode.cache.execute.FunctionException：java.lang.ClassCastException：org.apache.geode.pdx.internal.PdxInstanceImpl无法转换为com.sas.cpm.model.Account 在org.apache.geode.cache.client.internal.ExecuteRegionFunctionOp $ ExecuteRegionFunctionOpImpl.processResponse（ExecuteRegionFunctionOp.java:583） ...另外15个造成原因：java.lang.ClassCastException：org.apache.geode.pdx.internal.PdxInstanceImpl无法转换为com.sas.cpm.model.Account 在com.sas.cpm.geode.UpdateCost.execute（UpdateCost.java:49）在org.apache.geode.internal.cache.execute.AbstractExecution.executeFunctionLocally处（AbstractExecution.java:331）在org.apache.geode.internal.cache.execute.AbstractExecution $ 2.run（AbstractExecution.java:300）在java.util.concurrent.ThreadPoolExecutor.runWorker（未知来源）在java.util.concurrent.ThreadPoolExecutor $ Worker.run（未知来源）在org.apache.geode.distributed.internal.ClusterDistributionManager.runUntilShutdown（ClusterDistributionManager.java:949）在org.apache.geode.distributed.internal.ClusterDistributionManager.doFunctionExecutionThread（ClusterDistributionManager.java:803）在org.apache.geode.internal.logging.LoggingThreadFactory.lambda $ newThread $ 0（LoggingThreadFactory.java:121）在java.lang.Thread.run（未知来源）

Answer 1

抛出ClassCastException的原因是您从缓存中接收到PdxInstance而不是Account，这是在您的域对象中实现PdxSerializable接口时发生的并使用read-serialized=true配置PDX序列化。

有关更多详细信息，请查看Implementing PdxSerializable in Your Domain Object和Programming Your Application to Use PdxInstances。干杯。

通过Geode的Function.execute（）方法访问ClassCastException自定义对象

1 个答案: