Shopping Service

Rules

Rule 1: Apply a 10% discount if the value of total purchases is over 100.

Facts

There are two facts named A customer made a purchase and A product is added.

package samples.shopping;

/**
 * Product
 */
public class Product {

    private String name;
    private float price;

    public String getName() {
        return name;
    }

    public float getPrice() {
        return price;
    }

    public void setName(String name) {
        this.name = name;
    }

    public void setPrice(float price) {
        this.price = price;
    }
}

package samples.shopping;

/**
 * Customer
 */
public class Customer {

    private String name;

    private int discount;

    public Customer(String name,
                    int discount) {
        this.name = name;
        this.discount = discount;
    }

    public String getName() {
        return name;
    }

    public int getDiscount() {
        return discount;
    }

    public void setDiscount(int discount) {
        this.discount = discount;
    }

    public void setName(String name) {
        this.name = name;
    }
}

package samples.shopping;

/**
 * Discount
 */
public class Discount {

    private Customer customer;
    private int amount;

    public Discount(Customer customer,
                    int amount) {
        this.customer = customer;
        this.amount = amount;
    }

    public Customer getCustomer() {
        return customer;
    }

    public int getAmount() {
        return amount;
    }

    public void setCustomer(Customer customer) {
        this.customer = customer;
    }

    public void setAmount(int amount) {
        this.amount = amount;
    }
}

package samples.shopping;

/**
 * Purchase
 */
public class Purchase {

    private String customer;
    private String product;

    public String getCustomer() {
        return customer;
    }

    public void setCustomer(String customer) {
        this.customer = customer;
    }

    public String getProduct() {
        return product;
    }

    public void setProduct(String product) {
        this.product = product;
    }
}

package samples.shopping;

/**
 * Purchase Log
 */
public class PurchaseLog {

    private String customer;

    private Product product;

    public PurchaseLog(String customer, Product product) {
        this.customer = customer;
        this.product = product;
    }

    public String getCustomer() {
        return customer;
    }

    public void setCustomer(String customer) {
        this.customer = customer;
    }

    public Product getProduct() {
        return product;
    }

    public void setProduct(Product product) {
        this.product = product;
    }
}

Deploying and testing the service

1. Deploy the rule service through the BRS management console. You can follow either of the two methods:
   
   
   • Bundle all artifacts in an .aar file and upload it (Rule Service -> Upload menu).
   • Create using the Rule Service wizard UI (Rule Service -> Create menu).
   
   The above steps are discussed in detail in section Exposing Rules as Services.
    
2. After deployment, click on List under Services in the main tab of the management console. The service will appear in the Deployed Services page.
3. Click Shopping Service to access the dashboard of the service.
4. Click Try this service in the Client Operations widget of the dashboard to invoke the Try-it tool.

5. Click addProduct in the left pane of the Try-it tool and issue a request similar to the following in the Try-it tool to add a product:
   
   

   <name>product name</name>
   <price>12.34</price>

   
   You would get the following result:
    

   <axis2ns11:addProductResponse xmlns:axis2ns11="http://com.test/shopping"/>

   
   

6. Click purchase in the left pane of the Try-it Tool and issue another request similar to the following to make a purchase:

   <customer>Tester</customer>
   <product>Test Product</product>

    

   The following would be logged in the terminal:

    New Customer : Tester
   
   Customer Tester just purchased Test Product

   Repeat this step ten times. You would get the following result in the Try-it tool:
   
   

    <discount>10</discount>
    <name>Tester</name>

7. Alternatively, you can use Generate Axis2 Client link in the  Client Operations widget of the dashboard to invoke the service. A client using generated stub codes is shown below where the codes were generated with the Unpacks the data binding classes check box checked.
   
   

   package org.wso2.carbon.samples;
   
   import org.apache.axis2.AxisFault;
   import org.wso2.carbon.samples.shoppingService.product.AddProduct;
   import org.wso2.carbon.samples.shoppingService.product.Product;
   import org.wso2.carbon.samples.shoppingService.purchaseOrder.Discount;
   import org.wso2.carbon.samples.shoppingService.purchaseOrder.Purchase;
   import org.wso2.carbon.samples.shoppingService.purchaseOrder.PurchaseOrder;
   import org.wso2.carbon.samples.shoppingService.stub.ShoppingServiceStub;
   import java.rmi.RemoteException;
   
   public class ShoppingServiceTestCase {
   
       public static void main(String[] args) {
   
           ShoppingServiceStub shoppingServiceStub = null;
           try {
               shoppingServiceStub = new ShoppingServiceStub("http://localhost:9763/services/ShoppingService");
               shoppingServiceStub._getServiceClient().getOptions().setManageSession(true);
   
               AddProduct addProduct = new AddProduct();
               Product product = new Product();
               product.setName("toy");
               product.setPrice(200);
               Product[] products = new Product[1];
               products[0] = product;
   
               shoppingServiceStub.addProduct(products);
   
               PurchaseOrder purchaseOrder = new PurchaseOrder();
               Purchase purchase = new Purchase();
               purchase.setCustomer("Ishara");
               purchase.setProduct("toy");
   
               Purchase[] purchases = new Purchase[1];
               purchases[0] = purchase;
   
               purchaseOrder.setPurchase(purchases);
               Discount[] discounts = shoppingServiceStub.purchase(purchases);
               int result = discounts[0].getAmount();
               System.out.println(result);
   
           } catch (AxisFault axisFault) {
               axisFault.printStackTrace();
           } catch (RemoteException e) {
               e.printStackTrace();
           }
       }
   }