This documentation is for WSO2 Business Rules Server 2.0.0.View documentation for the latest release.

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This section explains numerous methods of exposing a rule set as a Web service through a simple, example usecase: "Order Approval" sample. It is only a part of a large rule set of an order processing application.

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5. Log in to the WSO2 BRS management console and select "Rule Service -> Upload" in the "Main" menu.

6. The "Upload Rule Service" window opens. Upload the file created in step 4 and click "Upload". For example,

7. The "Deployed Services" window opens with the newly uploaded business rules exposed as a service. Click on it to access its dashboard and select the TryIt option on the "Client Operations" panel in the service dashboard.

8. The Try-It tool can be used to test the sample through a request similar to the one shown bellow.

 

Code Block
<symbol>Company A</symbol>
<quantity>223</quantity>
<price>14</price>

 

9. Each rule can be tested by changing values in the symbol, price and quantity. For the request given above, the response will be as follows.

 

Code Block
languagehtml/xml
<brs:placeOrderResponse>
     <brs:result>
         <brs:OrderAccept xsi:type="ax2277:OrderAccept">
                <ax2275:message>Accepted order for: 223 stocks of IBM at$ 14.0</ax2275:message>
         </brs:OrderAccept>
     </brs:result>
</brs:placeOrderResponse>

 

10. Also, the WSDL of the service can be used to generate client-side code (stub) required for the service invocation. There is an option for code generation in the services management page. A client using generated stub codes is shown below and the codes are generated with option - "Unpacks the databinding classes".

Code Block
languagejava
package org.wso2.carbon.samples;
import org.wso2.carbon.samples.orderApprovalService.order.OrderAccept;
import org.wso2.carbon.samples.orderApprovalService.order.PlaceOrder;
import org.wso2.carbon.samples.orderApprovalService.order.PlaceOrderE;
import org.wso2.carbon.samples.orderApprovalService.order.PlaceOrderRespone;
import org.wso2.carbon.samples.orderApprovalService.stub.OrderApprovalServiceCallbackHandler;
import org.wso2.carbon.samples.orderApprovalService.stub.OrderApprovalServiceStub;
import java.rmi.RemoteException;

public class PlaceOrderTestCase {

    public static void main(String[] args) {

        try {
            OrderApprovalServiceStub orderApprovalServiceStub = new OrderApprovalServiceStub("http://localhost:9763/services/OrderApprovalService");
            PlaceOrderE placeOrderE = new PlaceOrderE();
            PlaceOrder placeOrder = new PlaceOrder();
            placeOrder.setSymbol("IBM");
            placeOrder.setPrice(150);
            placeOrder.setQuantity(128);
            PlaceOrder[] placeOrders = new PlaceOrder[1];
            placeOrders[0] = placeOrder;
            placeOrderE.setOrder(placeOrders);

            PlaceOrderRespone placeOrderRespone = null; //new PlaceOrderRespone();
            try {
                placeOrderRespone = orderApprovalServiceStub.placeOrder(placeOrders);
            } catch (RemoteException e) {
                e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
            }
            OrderAccept[] orderAccepts = placeOrderRespone.getOrderAccept();
            String result = orderAccepts[0].getMessage();
            System.out.println(result);



        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

Rule Service Wizard

A rules service can be created through the rule service wizard of the WSO2 BRS management console, as follow.

1. Log in to the WSO2 BRS management console and select "Rule Service -> Create" in the "Main" menu.

2. The "Service Information" window opens. Enter the required information and click "Next". The service name has to be unique. For example,

3. The "Rule Set Information" window appears.

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There are four ways to specify a rule set or a rule script.

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 4. Once the rule is uploaded click "Next". The "Facts Upload" window appears to upload facts and results that are used in the rule script. It should be a valid jar file and multiple jar files can be uploaded. For example, create a jar file from the facts and results defined in Sample Rule Definition.

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