Building a Business Logic Layer Over Multiple Web Services by Rajesh Zade & Avinash Moharil
WSJ Vol 03 Issue 08 - pg.20

Listing 1

package timesheet;

import java.rmi.Remote;
import java.rmi.RemoteException;

public interface TimesheetIF extends Remote
{
    public int getHours(int empId) throws RemoteException;
    public int getRate(int empId) throws RemoteException;
	

Listing 2

package timesheet;

public class TimesheetImpl implements TimesheetIF
{
    public int getHours(int empId){
		if (empId == 1) return 30;
		else if (empId == 2) return 40;
		else if (empId == 3) return 50;
		else return 60;
    }
    public int getRate(int empId){
		if (empId == 1) return 50;
		else if (empId == 2) return 60;
		else if (empId == 3) return 70;
		else return 80;
    }

Listing 3 Configuration File Read by the wscompile Tool

<?xml version="1.0" encoding="UTF-8"?>
<configuration xmlns="http://java.sun.com/xml/ns/jax-rpc/ri/config">
	<wsdl location="http://localhost:8080/timesheet-jaxrpc/timesheet?WSDL"
	 packageName="timesheet"/>
</configuration>


Listing 4 Configuration File Read by the wsdeply Tool

<?xml version="1.0" encoding="UTF-8"?>
<webServices xmlns="http://java.sun.com/xml/ns/jax-rpc/ri/dd" version="1.0"
targetNamespaceBase="http://com.test/wsdl" typeNamespaceBase="http://com.test/types"
 urlPatternBase="/ws">
<endpoint name="MyTimesheet" displayName="Timesheet Service" description="A
 Timesheet web service" interface="timesheet.TimesheetIF"
  implementation="timesheet.TimesheetImpl"/>
<endpointMapping endpointName="MyTimesheet" urlPattern="/timesheet"/>
</webServices>


Listing 5: Payroll client using both timesheet and insurance services

...
  Stub stub1 = createTimesheetProxy();
  TimesheetIF timesheet = (TimesheetIF)stub1;

  // create stub for insurance service
  Stub stub2 = createInsuranceProxy();
  InsuranceIF insurance = (InsuranceIF)stub2;

  // claculate payroll
  System.out.println("======[LogicalLayer:client]: Payroll Information ============");
  for (empId=1; empId<4; empId++)
  {
	System.out.println("Salary for emp # " + empId + " for this period is:$" +
	((timesheet.getHours(empId) * timesheet.getRate(empId))
		-     (insurance.getHealthPremium(empId) +
			insurance.getLifePremium(empId) +
			insurance.getDisabilityPremium(empId))));
  }
...