Implement and access stateful Web services using WebSphere Studio, Part 2

...
com.ibm.samples.calculator.CalculatorService calculatorService = null;

// Initial Context
javax.naming.InitialContext ic = new javax.naming.InitialContext();

// Lookup calculator SI
// Returns object support javax.xml.rpc.Service
com.ibm.samples.calculator.CalculatorServiceService calculatorServiceSI 
		= (com.ibm.samples.calculator.CalculatorServiceService) 
		ic.lookup("java:comp/env/service/CalculatorServiceService");

// Get the calculator SEI
calculatorService = (com.ibm.samples.calculator.CalculatorService) 
	                  
calculatorServiceSI.getPort(com.ibm.samples.calculator.CalculatorService.class);

if(calculatorService != null)
{
    try
    {
        String acctName = request.getParameter("acctName");
        ...        
        boolean delete = false;
        if(request.getParameter("delete") != null)
        	delete = true;
        ...                        
        javax.xml.soap.SOAPElement SE = calculatorService.getCalculator(acctName);
        ...
        com.ibm.samples.wsa.wsaddr.EndpointReference epr = 
                              com.ibm.samples.wsa.wsaddr.EndpointReference.fromSOAPElement(SE);   
         ...                                       
		// Call JAXRPCHelper to associate EPR with account and make it stateful
		com.ibm.samples.wsa.utils.JAXRPCHelper.setEPR( (javax.xml.rpc.Stub) calculatorService , 
		                                               epr);	
   	           // Call a couple of other methods on calculator service		
		calculatorService.add(add);		
		calculatorService.sub(sub);

                        // destroy the ws-resource instance
		if(delete)  calculatorService.destroy();            
...