writing Java client for web service based on XSD

[Girish Vasmatkar]

Hello to all,

My question is : Is it possible to write Java client code for a web service without knowing about the WSDL file?

I have been given an XSD file and two XML files one is input and the other one is output xml. I don't have any WSDL associated with the webservice. How do I write the client code. Can JAXB be used here? I have written client code using Apache axis but every time i have an endpoint address in the form of WSDL but in this case i don't have WSDL...

What can I do? Please suggest me a solution.

Thanks and Regards,
Girish

[Bhagat Singh Rawat]

Girish Vasmatkar wrote:Hello to all,

My question is : Is it possible to write Java client code for a web service without knowing about the WSDL file?

I have been given an XSD file and two XML files one is input and the other one is output xml. I don't have any WSDL associated with the webservice. How do I write the client code. Can JAXB be used here? I have written client code using Apache axis but every time i have an endpoint address in the form of WSDL but in this case i don't have WSDL...

What can I do? Please suggest me a solution.

Thanks and Regards,
Girish

I believe this would be a asynchronous call. is it right?

[Girish Vasmatkar]

Yes it is an asynchronous call. How do I now proceed with it. I have read webpage and I think this is exactly what I am looking for but this article doesn't provide any code reference.

[Bhagat Singh Rawat]

This is just an example for Synchronous Call by using XSD, similarly you can use for asynchronous call too


Client Code for Purchase Order

package com.bhagat.training.soap.client;
import org.apache.xmlbeans.samples.enumeration.schemaenum.easypo.PORequestDocument;
import org.w3c.dom.Document;

import javax.xml.soap.*;

public class POClient
{


    public POClient()
    {
          try
          {

           MessageFactory msgFactory= MessageFactory.newInstance();
           SOAPMessage message=msgFactory.createMessage();

           SOAPPart soapPart=message.getSOAPPart();

           SOAPBody body=message.getSOAPBody();

           body.addDocument(populateBody().getOwnerDocument());

           message.writeTo(System.out);

           SOAPConnectionFactory connectionFactory= SOAPConnectionFactory.newInstance();
           SOAPConnection connection= connectionFactory.createConnection();
              
           SOAPMessage respMessage= connection.call(message,"http://localhost:8080/SOAP/POServlet");

           System.out.println("*** received response back from server  ");
           respMessage.writeTo(System.out);




          }catch (Exception e){e.printStackTrace();}


    }


    public org.w3c.dom.Node populateBody()
    {

        PORequestDocument document= PORequestDocument.Factory.newInstance();
        PORequestDocument.PORequest porequest=document.addNewPORequest();
        porequest.setOrderID("101");
        porequest.setDescription("gold");
        porequest.setQty("20");

        return document.getPORequest().getDomNode();
        
    }

   public static void main (String a[])
   {

       POClient client=new POClient();

   }


}

Server Code for for Purchase Order ---- I am Using JAXMServlet............ You can use JAX-RPC

package com.bhagat.training.soap.server;
import org.apache.xmlbeans.samples.enumeration.schemaenum.easypo.PORequestDocument;
import org.apache.xmlbeans.samples.enumeration.schemaenum.easypo.POResponseDocument;

import javax.xml.messaging.JAXMServlet;
import javax.xml.messaging.ReqRespListener;
import javax.xml.soap.*;
import java.util.Iterator;

public class POServlet extends JAXMServlet implements ReqRespListener

{
  SOAPFactory factory;

   public  POServlet()
   {

      try
      {
       factory= SOAPFactory.newInstance();
      }catch (Exception e) {e.printStackTrace();}
   }

 public SOAPMessage onMessage(SOAPMessage inputMsg)
 {
     SOAPMessage soapResponseMSG=null;
     try
     {
     System.out.println("*** Received SOAP message from server ");
     inputMsg.writeTo(System.out);

     SOAPBody body=inputMsg.getSOAPBody();

     Name name=factory.createName("PORequest","xmlns","http://xmlbeans.apache.org/samples/enumeration/schemaenum/easypo");
     Iterator it=body.getChildElements(name);

     PORequestDocument document= PORequestDocument.Factory.parse(it.next().toString());
     PORequestDocument.PORequest request=document.getPORequest();
     System.out.println(" orderID :  "+ request.getOrderID());
     System.out.println(" Description :  "+ request.getDescription());
     System.out.println(" QTY :  "+ request.getQty());


     POResponseDocument responseDocument=POResponseDocument.Factory.newInstance();
     POResponseDocument.POResponse poresponse=responseDocument.addNewPOResponse();
     poresponse.setOrderID(request.getOrderID());
     poresponse.setPrice("5000 $");


     soapResponseMSG= MessageFactory.newInstance().createMessage();
     SOAPBody responseBody= soapResponseMSG.getSOAPBody();
     responseBody.addDocument(responseDocument.getPOResponse().getDomNode().getOwnerDocument());


     }catch (Exception e) {e.printStackTrace();}

      return soapResponseMSG;

 }

}

PO(Purchase Order) XSD looks like

<purchase-order xmlns="http://openuri.org/easypo">
    <customer>
        <name>Bhagat Singh</name>
        <address>King Of Prussia, PA</address>
    </customer>
    <date>2009-04-07T14:16:00-05:00</date>
    <line-item>
        <description>Head First Design Pattern, Vol 1</description>
        <per-unit-ounces>5</per-unit-ounces>
        <price>21.79</price>
        <quantity>2</quantity>
    </line-item>
    <line-item>
        <description>Head First Design Pattern, Vol 2</description>
        <per-unit-ounces>5</per-unit-ounces>
        <price>19.89</price>
        <quantity>2</quantity>
    </line-item>
    <shipper>
        <name>ZipShip</name>
        <per-ounce-rate>0.74</per-ounce-rate>
    </shipper>
</purchase-order>

Create Jar file from XSD, I was using XML Bean to create Jar filehttp://xmlbeans.apache.org/, and put jar in your classpath

Finally Run your client code

All the best and hope it will be helpful for you.