Axis2 User Guide Example

I am going throug the user guide for Axis2 and trying to build a simple web service. I have Tomcat 5 server.

This is the SampleService.java

package org.apache.axis2.axis2userguide;

import javax.xml.stream.XMLStreamException;
import org.apache.axiom.om.OMAbstractFactory;
import org.apache.axiom.om.OMElement;
import org.apache.axiom.om.OMFactory;
import org.apache.axiom.om.OMNamespace;

public class SampleService {

    public OMElement sayHello(OMElement element) throws XMLStreamException {
            element.build();
            element.detach();

            String rootName = element.getLocalName();
            System.out.println("Reading "+rootName+" element");
           
            OMElement childElement = element.getFirstElement();
            String personToGreet = childElement.getText();

            OMFactory fac = OMAbstractFactory.getOMFactory();
            OMNamespace omNs = fac.createOMNamespace("http://example1.org/example1", "example1");
            OMElement method = fac.createOMElement("sayHelloResponse", omNs);
            OMElement value = fac.createOMElement("greeting", omNs);
            value.addChild(fac.createOMText(value, "Hello, "+personToGreet));
            method.addChild(value);

            return method;
        }

     private void ping(){
     }
   
}

This is services.xml
<?xml version='1.0' encoding='utf-8' ?>

<service name="UserGuideSampleService">
    <description>
        This is a sample service created in the Axis2 User's Guide
    </description>

    <parameter name="ServiceClass"
locked="false">org.apache.axis2.axis2userguide.SampleService
</parameter>

    <operation name="sayHello">
        <messageReceiver
class="org.apache.axis2.receivers.RawXMLINOutMessageReceiver"/>
    </operation>
    <operation name="ping">
        <messageReceiver
class="org.apache.axis2.receivers.RawXMLINOnlyMessageReceiver"/>
    </operation>
</service>

I have copied the SampleService.aar file to
Tomcat_Home\webapps\axis2\WEB-INF\services

This the client file

package org.apache.axis2.axis2userguide;

import javax.xml.stream.XMLStreamException;
import org.apache.axiom.om.OMAbstractFactory;
import org.apache.axiom.om.OMElement;
import org.apache.axiom.om.OMFactory;
import org.apache.axiom.om.OMNamespace;
import org.apache.axis2.addressing.EndpointReference;
import org.apache.axis2.client.Options;
import org.apache.axis2.Constants;
import org.apache.axis2.client.ServiceClient;

public class SampleClient {

       private static EndpointReference targetEPR =
             new EndpointReference("http://localhost:8080/axis2/services/UserGuideSampleService");

        public static OMElement greetUserPayload(String personToGreet) {

                  OMFactory fac = OMAbstractFactory.getOMFactory();
            OMNamespace omNs = fac.createOMNamespace("http://example1.org/example1", "example1");
            OMElement method = fac.createOMElement("sayHello", omNs);
            OMElement value = fac.createOMElement("personToGreet", omNs);
            value.addChild(fac.createOMText(value, personToGreet));
            method.addChild(value);
            return method;
        }

        public static void main(String[] args) {
            try {
                OMElement payload = SampleClient.greetUserPayload("John");
System.out.println("11111111111111111");
                Options options = new Options();
                options.setTo(targetEPR);
                System.out.println("22222222222222");
                options.setTransportInProtocol(Constants.TRANSPORT_HTTP);
System.out.println("33333333333");
                ServiceClient sender = new ServiceClient();
System.out.println("444444444");
                        sender.setOptions(options);
                        System.out.println("5555555555555555");
                OMElement result = sender.sendReceive(payload);
                        System.out.println("66666666666666");
                String response = result.getFirstElement().getText();
                System.out.println(response);

            } catch (Exception e) { //(XMLStreamException e) {
                System.out.println(e.toString());
            }
        }
   
}

It compiles fine, but when I try to run it, I get the following error

D:\sampleWebService>java org.apache.axis2.axis2userguide.SampleClient
11111111111111111
22222222222222
33333333333
Exception in thread "main" java.lang.ExceptionInInitializerError
        at org.apache.axis2.deployment.DescriptionBuilder.buildOM(DescriptionBu
lder.java:86)
        at org.apache.axis2.deployment.AxisConfigBuilder.populateConfig(AxisCon
igBuilder.java:58)
        at org.apache.axis2.deployment.DeploymentEngine.populateAxisConfigurati
n(DeploymentEngine.java:690)
        at org.apache.axis2.deployment.FileSystemConfigurator.getAxisConfigurat
on(FileSystemConfigurator.java:109)
        at org.apache.axis2.context.ConfigurationContextFactory.createConfigura
ionContext(ConfigurationContextFactory.java:61)
        at org.apache.axis2.context.ConfigurationContextFactory.createConfigura
ionContextFromFileSystem(ConfigurationContextFactory.java:180)
        at org.apache.axis2.client.ServiceClient.initializeTransports(ServiceCl
ent.java:189)
        at org.apache.axis2.client.ServiceClient.configureServiceClient(Service
lient.java:118)
        at org.apache.axis2.client.ServiceClient.<init>(ServiceClient.java:114)
        at org.apache.axis2.client.ServiceClient.<init>(ServiceClient.java:207)
        at org.apache.axis2.axis2userguide.SampleClient.main(SampleClient.java:
8)
Caused by: java.lang.IllegalStateException: No valid ObjectCreator found.
        at org.apache.axiom.om.util.StAXUtils$Pool.<init>(StAXUtils.java:41)
        at org.apache.axiom.om.util.StAXUtils.<clinit>(StAXUtils.java:62)
        ... 11 more


Please tell me how to resolve this problem...
Thank You

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