2005_09_01_archive

WSDL Sample

Before porting the web service module into a J2EE application, firstly

lets look at how I get a stock quote in a normal Java concole.

As I will continue on application of WSDL on my next post ... .

Below is the full generic code to demostrate on calling a WSDL:

//

// XMethods sample client for the Stock Quote service

//

import java.io.*;

import java.net.*;

import java.util.*;

import org.apache.soap.util.xml.*;

import org.apache.soap.*;

import org.apache.soap.rpc.*;

public class StockQuoteClient{

public static float getQuote (URL url, String symbol) throws Exception {

Call call = new Call ();

// Service uses standard SOAP encoding

String encodingStyleURI = Constants.NS_URI_SOAP_ENC;

call.setEncodingStyleURI(encodingStyleURI);

// Set service locator parameters

call.setTargetObjectURI ("urn:xmethods-delayed-quotes");

call.setMethodName ("getQuote");

// Create input parameter vector

Vector params = new Vector ();

params.addElement (new Parameter("symbol", String.class, symbol, null));

call.setParams (params);

// Invoke the service ....

Response resp = call.invoke (url,"");

// ... and evaluate the response

if (resp.generatedFault ()) {

throw new Exception();

} else {

// Call was successful. Extract response parameter and return result

Parameter result = resp.getReturnValue ();

Float rate=(Float) result.getValue();

return rate.floatValue();

}

}

// Driver to illustrate service invocation

public static void main(String[] args) {

try {

URL url=new URL("http://services.xmethods.net:80/soap");

String symbol= args[0];

float quote = getQuote(url,symbol);

System.out.println(quote);

}