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Create a Web Service Interface and WSDL File

Exercise

In this lab you will create a web service interface using Java™ that describes the calculator operations the web service will provide. Using this interface, you will then generate a standard WSDL file.

Prerequisites

• None

Objectives

• Discover how to create a web service interface.
• See how to describe the operations of a calculator with a Java interface.
• Discover how to generate the WSDL file for the web service based on the interface created previously.

Setup Tasks

The following software is required to perform this series of labs:
Application server: Apache Tomcat
Web service platform: Apache Axis

Tasks:

Create a Web Service Interface

1. Create a new file with the following Java interface:

       package calculator;
       public interface Calculator{
           public double add( double a, double b ); // returns a plus b
           public double subtract( double c, double d ); // returns c minus d
       }

2. Save the file as Calculator.java.
3. Compile the file. (Note: make sure the Calculator.class is located under calculator folder)

Generate a WSDL File

1. Verify that the Axis libraries are in your class path.
2. To generate the WSDL file, run Java2WSDL with the required arguments.

       % java org.apache.axis.wsdl.Java2WSDL –o calc.wsdl –y WRAPPED 
       –l"http://localhost:8080/axis/services/calculator" –n "urn:calculator" 
       –p"calculator" "urn:calculator" calculator.Calculator

Check Your Work

Download the completed code:
Calculator.java
Calc.wsdl

Additional Labs

Go to the next exercise in “Building a Calculator Web Service Using Apache Tomcat/Axis”, Generate Server Stubs Using Apache Axis WSDL2Java.

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