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WSO2 BRS - Samples : Insurance Service

This guide demonstrates a simple insurance service which uses business rules.

Please follow the User Guide before proceeding with this sample, if you have not already followed the User Guide.

Contents

Insurance Service

Rules

Given a car and a driver, if all of the following conditions are met :

  • The car is red
  • The car is in a sport class
  • The driver is male
  • The driver is between the ages of 16-25
The consequence is a 20% insurance premium increase.

Facts

There are two facts - Driver and Car , and a one result - Policy.

package samples.insurance;

/**
 * Car
 */
public class Car {

    private String style;
    private String color;

    public String getStyle() {
        return style;
    }

    public void setStyle(String style) {
        this.style = style;
    }

    public String getColor() {
        return color;
    }

    public void setColor(String color) {
        this.color = color;
    }
}
package samples.insurance;

/**
 * Driver
 */
public class Driver {

    private int age;
    private String name;
    private boolean male;

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public String getName() {
        return name;
    }

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

    public boolean isMale() {
        return male;
    }

    public void setMale(boolean male) {
        this.male = male;
    }
}
package samples.insurance;

/**
 * Policy
 */
public class Policy {

    private double premium = 100000;

    public double getPremium() {
        return premium;
    }

    public void setPremium(double premium) {
        this.premium = premium;
    }

    public void increasePremium(double percentage) {
        setPremium((percentage + 1) * premium);
    }

    public void decreasePremium(double percentage) {
        setPremium((1 - percentage) * premium);
    }
}

Rule Service Configuration - service.rsl

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

                import samples.insurance.Driver;
                import samples.insurance.Car;
                import samples.insurance.Policy;

                rule "High Risk"
                when
                      Driver( ( male == true) && ( age >= 16 ) && ( age <= 25 ))
                      Car ( ( style == "sport") && ( color=="red" ) )
                then
                      Policy p = new Policy ();
                           p.increasePremium(0.2);
                           insertLogical(p);
                end
            ]]>
        </rule>
    </ruleSet>
    <operation name="applyForInsurance">
        <input wrapperElementName="applyForInsurance" namespace="http://com.test/applyForInsurance">
            <fact elementName="carInsurance" namespace="http://com.test/applyForInsurance" type="samples.insurance.Car"></fact>
	    <fact elementName="driverInsurance" namespace="http://com.test/applyForInsurance" type="samples.insurance.Driver"></fact>
        </input>
        <output wrapperElementName="insurancerApplicationRespone" namespace="http://com.test/applyForInsurance">
            <fact elementName="insurancePolicy" namespace="http://com.test/applyForInsurance" type="samples.insurance.Policy"></fact>
        </output>
    </operation>
</ruleService>

Deploying Service

You can either create an .aar file and upload or create a rule service using rule service wizard UI. Please refer the User Guide for more information.

Testing Sample

You can use Try-it tool with a request similar to the following.

Put following in the car

<color>red</color>
<style>sport</style>

Put following in the Driver

<age>20</age>
<name>your name</name>
<male>true</male>

You can also use the code generation. There is an option for code generation in the services management page. A client using generated stub codes is shown bellow. Codes was generated with option - Unpacks the databinding classes.

package org.wso2.carbon.samples;

import org.apache.axis2.AxisFault;
import org.wso2.carbon.samples.insuranceService.insurance.ApplyForInsurance;
import org.wso2.carbon.samples.insuranceService.insurance.Car;
import org.wso2.carbon.samples.insuranceService.insurance.Driver;
import org.wso2.carbon.samples.insuranceService.insurance.Policy;
import org.wso2.carbon.samples.insuranceService.stub.InsuranceServiceStub;
import java.rmi.RemoteException;

public class InsuranceServiceTestCase {

    public static void main(String[] args) {

        try {
            InsuranceServiceStub insuranceServiceStub =
                    new InsuranceServiceStub("http://localhost:9763/services/InsuranceService");
            ApplyForInsurance applyForInsurance = new ApplyForInsurance();

            Car car = new Car();
            car.setColor("red");
            car.setStyle("sport");
            Car[] cars = new Car[1];
            cars[0] = car;

            Driver driver = new Driver();
            driver.setName("your name");
            driver.setAge(24);
            driver.setMale(true);
            Driver[] drivers = new Driver[1];
            drivers[0] = driver;

            applyForInsurance.setCarInsurance(cars);
            applyForInsurance.setDriverInsurance(drivers);

            Policy[] policies = insuranceServiceStub.applyForInsurance(cars, drivers);
            double result = policies[0].getPremium();
            System.out.println(result);
        } catch (AxisFault axisFault) {
            axisFault.printStackTrace();
        } catch (RemoteException e) {
            e.printStackTrace();
        }
    }
}

References