Web Service portlet using pdk documentation issue

Question

Hi,
I have followed the instructions in
http://portalcenter.oracle.com/pls/ops/docs/FOLDER/COMMUNITY/PDK/ARTICLES/how.to.build.web.services.portlets.html
on how to build web service portlets.
I have successfully deployed the WS portlet and can happily call my web Service (RPC style) passing a set of parameters which I have formatted using a stylesheet.
However, every time I refresh the page within portal, it recalls the WS with the previously submitted parameters. Also, if I switch between view and edit mode in portal, it again calls the WS with previously entered parameters.
Can I stop this happening either through a setting in portal or code in my Stub class. (Stub class below)
Thanks alot
Joel.
package mypackage;
import oracle.soap.transport.http.OracleSOAPHTTPConnection;
import org.apache.soap.encoding.SOAPMappingRegistry;
import java.math.BigDecimal;
import java.net.URL;
import org.apache.soap.rpc.Call;
import org.apache.soap.Constants;
import java.util.Vector;
import org.apache.soap.rpc.Parameter;
import org.apache.soap.rpc.Response;
import org.apache.soap.Fault;
import org.apache.soap.SOAPException;
import java.util.Properties;
* Generated by the Oracle JDeveloper 10g Web Services Stub/Skeleton Generator.
* Date Created: Thu Feb 03 15:38:22 GMT 2005
* WSDL URL: file:/D:/Software/Oracle/NT/jdev_10.1.2/jdev/mywork/blah/CreateSR2/src/LG02/CreateSR2.wsdl
public class CreateSR2Stub
public CreateSR2Stub()
m_httpConnection = new OracleSOAPHTTPConnection();
m_smr = new SOAPMappingRegistry();
public static void main(String[] args)
try
CreateSR2Stub stub = new CreateSR2Stub();
// Add your own code here.
catch(Exception ex)
ex.printStackTrace();
private String _endpoint = "http://myServer:7779/Blah-CreateSR2-context-root/CreateSR2";
public String getEndpoint()
return _endpoint;
public void setEndpoint(String endpoint)
_endpoint = endpoint;
private OracleSOAPHTTPConnection m_httpConnection = null;
private SOAPMappingRegistry m_smr = null;
public String createSrStub(BigDecimal pCitizen, String pAccountType, String pSummary, String pReferral, String pReason, String pHouse, String pRos, BigDecimal pGroup, String pOwner, String pMode, String pFrom) throws Exception
String returnVal = null;
URL endpointURL = new URL(_endpoint);
Call call = new Call();
call.setSOAPTransport(m_httpConnection);
call.setTargetObjectURI("CreateSR2");
call.setMethodName("createSrStub");
call.setEncodingStyleURI(Constants.NS_URI_SOAP_ENC);
Vector params = new Vector();
params.addElement(new Parameter("pCitizen", BigDecimal.class, pCitizen, null));
params.addElement(new Parameter("pAccountType", String.class, pAccountType, null));
params.addElement(new Parameter("pSummary", String.class, pSummary, null));
params.addElement(new Parameter("pReferral", String.class, pReferral, null));
params.addElement(new Parameter("pReason", String.class, pReason, null));
params.addElement(new Parameter("pHouse", String.class, pHouse, null));
params.addElement(new Parameter("pRos", String.class, pRos, null));
params.addElement(new Parameter("pGroup", BigDecimal.class, pGroup, null));
params.addElement(new Parameter("pOwner", String.class, pOwner, null));
params.addElement(new Parameter("pMode", String.class, pMode, null));
params.addElement(new Parameter("pFrom", String.class, pFrom, null));
call.setParams(params);
call.setSOAPMappingRegistry(m_smr);
Response response = call.invoke(endpointURL, "");
if (!response.generatedFault())
Parameter result = response.getReturnValue();
returnVal = (String)result.getValue();
else
Fault fault = response.getFault();
throw new SOAPException(fault.getFaultCode(), fault.getFaultString());
return returnVal;
public void setMaintainSession(boolean maintainSession)
m_httpConnection.setMaintainSession(maintainSession);
public boolean getMaintainSession()
return m_httpConnection.getMaintainSession();
public void setTransportProperties(Properties props)
m_httpConnection.setProperties(props);
public Properties getTransportProperties()
return m_httpConnection.getProperties();
}

Answer 1

Hi Joel,
You can enable caching for your portlet. There are three types of caching you can use: expiry, validation, and invalidation-based caching. You can learn about your options in the Enhancing Portlet Performance with Caching section of the Portal Developer's Guide.
Regards,
Peter