The WSIT Tutorial

Web Service Implementation Java File

The sample files define a web service that takes two integers, adds them, and returns the result. If one of the integers is negative, an exception is thrown.

The starting point for developing a web service that uses the WSIT technologies is a Java class file annotated with the javax.jws.WebService annotation. The @WebService annotation defines the class as a web service endpoint.

The following file (wsit-enabled-fromjava/src/fromjava/ implements the web service interface.package fromjava.server;

import javax.jws.WebService;
import javax.jws.WebMethod;

public class AddNumbersImpl {
    public int addNumbers(int number1, int number2)
            throws AddNumbersException {
        if (number1 < 0 || number2 < 0) {
            throw new AddNumbersException(
                    "Negative number cannot be added!",
                    "Numbers: " + number1 + ", " + number2);
        return number1 + number2;

Note –

To ensure interoperability with Windows Communication Foundation (WCF) clients, you must specify the action element of @WebMethod in your endpoint implementation classes. WCF clients will incorrectly generate an empty string for the Action header if you do not specify the action element.