using datasource with streaming api inside a web service

[pre]I am using the 9.1 server and accessing a datasource
created with aldsp3.0.  When I run the code below as a 
standalone java app, everything works fine.  When I run it 
on the server, I get a class cast exception when trying to cast an object
returned from the stream to MyData type.
When running the java app in the debugger, the objects 
[b]dataServiceDoc[/b], [b]dog[/b] , and [b]dObj[/b] all have 
the correct type.  When running the web service in the debugger, the objects are
all of type 
[b]DataObjectGeneral[/b], thus causing the cast error.

Any help will be greatly appreciated!

Thanks.


package services;

import javax.jws.WebMethod;
import javax.jws.WebService;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;

import weblogic.jndi.Environment;

import com.bea.dsp.RequestConfig;
import com.bea.dsp.das.DASResult;
import com.bea.dsp.das.DataAccessServiceFactory;
import com.bea.dsp.das.PreparedExpression;
import com.bea.sdo.impl.data.DataObjectGeneral;
import commonj.sdo.DataObject;

@WebService
public class MyService
{
  private final static String MY_URL = "t3://localhost:8001";
  private final static String DS_URL = "t3://localhost:7001";
      
  @WebMethod
  public String testMethod2()
  {
    StringBuilder result = new StringBuilder();
    try
    {    
      // Get the initial context to the WebLogic Server passing in user
credentials
      Context ctx = getInitialContext(DS_URL,"weblogic",
"weblogic");

      RequestConfig reqConfig = new RequestConfig();
      result.append("[created RequestConfig object]");

      reqConfig.enableFeature(RequestConfig.RETURN_DATA_SERVICE_AUDIT);
      reqConfig.enableFeature(RequestConfig.RETURN_AUDIT_PROPERTIES);
      reqConfig.setStringArrayAttribute(RequestConfig.RETURN_AUDIT_PROPERTIES,
                        new String[] { "common", "query"
});;
  
      String dspDataSpace = "MY_DS";
  
      String adhoc = createQuery();
  
      PreparedExpression pe = DataAccessServiceFactory.prepareExpression(ctx,
dspDataSpace, adhoc);
  
      DASResult<Object> dasResult = pe.executeQuery(reqConfig);

      int i = 0;
      int N = 100;
      Long[] ids = new Long[N];
  
      while (dasResult.hasNext() && i<N) 
      {

        Object dataServiceDoc = dasResult.next();
  
        // Convert Object to a Data Object
        DataObjectGeneral dog = (DataObjectGeneral) dataServiceDoc;
        DataObject dObj = dog.getRootObject();

        // Cast the Data Object to the SDO Type (MyDataType)
        MyDataType p = (MyDataType) dObj;
  
        i++;
      }
    } 
    catch (Exception e) 
    {
      result.append(e);
    }
    return result.toString();
  }

  private static InitialContext getInitialContext(String url, String username,
String password) throws NamingException 
  {
    Environment env = new Environment();
    env.setProviderUrl(url);
   
env.setInitialContextFactory("weblogic.jndi.WLInitialContextFactory");

    env.setSecurityPrincipal(username);
    env.setSecurityCredentials(password);
    return new InitialContext(env.getInitialContext().getEnvironment());
  }
  
  public static void main(String [] args)
  {
	  MyService ms = new MyService();
	  System.out.println(ms.testMethod2());
  }
}

[/pre]

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Edited by ddruding at 11/29/2007 11:28 AM

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