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- Windows, Linux or Solaris operating system should exist.
- WSO2 BRS should be installed. To install the BRS, refer Installing the Product . This also includes installing Apache Ant as one of the Installation Prerequisites.
- WSO2 BRS should be started as described in Running the Product.
Sample
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configuration
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Sample
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rule definition
Rules
A 20% increase in the insurance premium would apply if all the following conditions are met with regard to a car and a driver.
- The car is red.
- The car is in a sport class.
- The driver is male.
- The age of the driver is 16-25.
Facts
There are two facts, which are the Driver and Car and one result, which is the Policy.
There are two facts named Driver
and Car
. Policy
is the result of the rule execution.
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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 Configurationservice configuration (service.rsl)
An in-line rule set is used within the service.rsl file as follows.
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<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> |
Executing the
Sampleservice
To execute the sampleservice, run the ant
command from the <PRODUCT_HOME>/samples/insurance.service
directory to run the Insurance Service.
Info |
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Before executing this sampleservice, it is recommended that you refer Exposing Rules as Services which explains in detail the process of writing and deploying a business rule. |
Deploying and
Testingtesting the
Sampleservice
- 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 .
- After deployment, click on List under Services in the main tab of the management console. The service will appear in the Deployed Services page.
- Click Insurance Service to access the dashboard of the service.
- Click Try this service in the Client Operations widget of the dashboard to invoke the Try-it tool.
Issue a request similar to the following in the Try-it tool.
The Car:Code Block language html/xml <color>red</color> <style>sport</style>
The Driver:
Code Block language html/xml <age>20</age> <name>your name</name> <male>true</male>
You would get the following result:Code Block language xml <premium>120000.0</premium>
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.Code Block language java 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(); } } }
Excerpt hidden true Car insurance service sample of the WSO2 Business Rules Server samples guide.
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