package net.programmera.ws.calculator;

import javax.xml.rpc.ServiceException;
import javax.xml.rpc.server.ServiceLifecycle;
import javax.xml.rpc.server.ServletEndpointContext;

public class CalculatorImpl implements Calculator, ServiceLifecycle{
    
    private ServletEndpointContext sepCtx;
    
    public void init(Object ctx) throws ServiceException{
        
        this.sepCtx=(ServletEndpointContext) ctx;
        System.out.println("Calculator: ServletEndpointContext retrieved.");
        this.sepCtx.getHttpSession().setAttribute("counter",new Integer(0));
    }
    
    public void destroy(){
        
    }
    
    public int  multiplication(MultiplicationRequestType multiplicationRequestPart) 
        throws  java.rmi.RemoteException{
        int result = 0;
        int multiplicand = multiplicationRequestPart.getMultiplicand();
        int multiplier = multiplicationRequestPart.getMultiplier();
        result = multiplicand * multiplier;
        
        count((float) result);

        return result;
        
    }
    public float  division(DivisionRequestType divisionRequestPart) 
        throws net.programmera.ws.calculator.DivideZeroFaultType, java.rmi.RemoteException{
        float result = 0;
        int  dividend = divisionRequestPart.getDividend();
        int  divisor = divisionRequestPart.getDivisor();

        if (divisor == 0){
        
            DivideZeroFaultType dzft= new DivideZeroFaultType(divisor,"Division by zero is not possible.");
            throw dzft;
        }

        result = (float) dividend / divisor;
        
        count(result);
        
        return result;
    }
    
    private void count(float res){
        // Increase counter
        Integer counter= (Integer) this.sepCtx.getHttpSession().getAttribute("counter");
        Integer count2= counter.intValue() +1;
        this.sepCtx.getHttpSession().setAttribute("counter", count2);
        System.out.println("Calculator: Call "+ count2 +", result="+ res);
    }
}