Page Comparison

<ruleService
        name="ShoppingService"
        xmlns="http://wso2.org/carbon/rules"
        targetNamespace="http://com.test/shopping"
	    scope="transportsession">
    <ruleSet>
        <rule resourceType="regular" sourceType="inline">
            <![CDATA[
                package shopping

                dialect "mvel"

                import samples.shopping.Customer;
                import samples.shopping.Product;
                import samples.shopping.Purchase;
                import samples.shopping.Discount;
                import samples.shopping.PurchaseLog;

                rule "Purchase notification new customer"
                    salience 11 no-loop true
                when
                    $p : Purchase()
                    not Customer(name == $p.customer)
                then
                    System.out.println( "New Customer : " + $p.customer);
                    insert(new Customer($p.customer, 0));
                end

                rule "Purchase notification"
                    salience 10 no-loop true
                when
                    $c : Customer()
                    $purchase : Purchase( customer == $c.name)
                    $product : Product( name == $purchase.product)
                then
                    insert(new PurchaseLog($c.name, $product));
                    modify($c){
                     setDiscount(0)
                    }
                    System.out.println( "Customer " + $c.name + " just purchased " + $product.name );
                end

                rule "Apply 10% discount if total purchases is over 100" salience 9  no-loop true dialect "java"
                    when
                            $p : Purchase()
                $c : Customer(name == $p.customer)
                $i : Double(doubleValue  > 100) from accumulate ( PurchaseLog( customer == $c.name, $price : product.price ),
                                                                            sum( $price ) )
                    then
                  $c.setDiscount( 10 );
                insert( new Discount($c, 10) );
                System.out.println( "Customer " + $c.getName() + " now has a shopping total of " + $i );
                end

                rule "cleanUp" salience 8
                when
                 $p : Purchase()
                then
                 retract($p);
                end
            ]]>
        </rule>
    </ruleSet>

 	<operation name="purchase">
        <input wrapperElementName="purchaseOrder" namespace="http://com.test/purchaseOrder">
            <fact elementName="purchase" namespace="http://com.test/purchaseOrder" type="samples.shopping.Purchase"></fact>
        </input>
        <output wrapperElementName="purchaseOrderRespone" namespace="http://com.test/purchaseOrder">
            <fact elementName="discount" namespace="http://com.test/purchaseOrder" type="samples.shopping.Discount"></fact>
        </output>
    </operation>
    <operation name="addProduct">
        <input wrapperElementName="addProduct" namespace="http://com.test/addProduct">
            <fact elementName="addProduct" namespace="http://com.test/addProduct" type="samples.shopping.Product"></fact>
        </input>
    </operation>
</ruleService>