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Sample

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configuration

Table of Contents
maxLevel4
minLevel4

Sample

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rule definition

Rules

Rule 1 : If a local calls was taken during daytime, then the call rate is two dollars per minute.

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Facts

There is one fact named A call has been taken (CallLog). a charge should be calculated for the call (CallCharge) is the result of the rule execution.

 

Code Block
languagejava
package samples.callcharging;
import java.util.Calendar;

/**
 * CallLog fact
 */
public class CallLog {

    private String type;

    private double period;

    public String getType() {
        return type;
    }

    public void setType(String type) {
        this.type = type;
    }

    public double getPeriod() {
        return period;
    }

    public void setPeriod(double period) {
        this.period = period;
    }

    public int now() {
        Calendar cal = Calendar.getInstance();
        return cal.get(Calendar.HOUR_OF_DAY);
    }
}

package samples.callcharging;

/**
 * CallCharge fact
 */
public class CallCharge {

    private double amount;

    public double getAmount() {
        return amount;
    }

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

Rule

Service Configuration

service configuration (service.rsl)

An in-line rule set is used within the service.rsl file as follows.

 

Code Block
languagehtml/xml
    <ruleService
        name="CallChargingService"
        xmlns="http://wso2.org/carbon/rules"
        targetNamespace="http://com.test/callcharging">
    <ruleSet>
        <rule resourceType="regular" sourceType="inline">
            <![CDATA[
                package callcharging

                import samples.callcharging.CallLog;
                import samples.callcharging.CallCharge;

                rule "Local Call During Daytime"
                when
                      callLog : CallLog( type == "local")
                           eval((6 < callLog.now()) && (callLog.now()< 18))
                then
                           CallCharge c = new CallCharge();
                           c.setAmount(callLog.getPeriod() * 2);
                           insertLogical(c);
                end

                rule "Local Call During Night"
                when
                      callLog : CallLog( type == "local")
                           eval((18 < callLog.now()) || (callLog.now()< 5))
                then
                           CallCharge c = new CallCharge();
                           c.setAmount(callLog.getPeriod() * 1);
                           insertLogical(c);
                end

                rule "IDD Call During Daytime"
                when
                      callLog : CallLog( type == "idd")
                           eval((6 < callLog.now()) && (callLog.now()< 18))
                then
                           CallCharge c = new CallCharge();
                           c.setAmount(callLog.getPeriod() * 6);
                           insertLogical(c);
                end

                rule "IDD Call During Night"
                when
                      callLog : CallLog( type == "idd")
                           eval((18 < callLog.now()) || (callLog.now()< 5))
                then
                           CallCharge c = new CallCharge();
                           c.setAmount(callLog.getPeriod() * 4);
                           insertLogical(c);
                end

            ]]>
        </rule>
    </ruleSet>
    <operation name="charge">
        <input wrapperElementName="callCharge" namespace="http://com.test/callCharge">
            <fact elementName="callLog" namespace="http://com.test/callCharge" type="samples.callcharging.CallLog"></fact>
        </input>
        <output wrapperElementName="callChargeRespone" namespace="http://com.test/callCharge">
            <fact elementName="callCharge" namespace="http://com.test/callCharge" type="samples.callcharging.CallCharge"></fact>
        </output>
    </operation>
</ruleService>

 

Executing the

Sample

service

To execute the sampleservice, run the ant command from the  <PRODUCT_HOME>/samples/callcharging.service directory to run the CallCharging Service.

Info

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

Testing

testing the

Service

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 CallChargingService 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. Issue the following request in the Try-it tool.:

    Code Block
    languagehtml/xml
    <type>idd</type> 
    <period>12</period>

    You would get the following response:

    Code Block
    languagehtml/xml
    <amount>48.0</amount>
  6. Issue another request as follows:

    Code Block
    languagehtml/xml
    <type>local</type>
    <period>12</period>


    You would get the following result:

    Code Block
    languagehtml/xml
    <amount>12.0</amount>
  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.

    Code Block
    languagejava
    package test.com.Client;
    
        import org.apache.axis2.AxisFault;
        import test.com.callcharge.CallCharge;
        import test.com.callcharge.CallChargeE;
        import test.com.callcharge.CallLog;
        import test.com.callcharging.CallChargingServiceStub;
    
        import java.rmi.RemoteException;
    
        public class CallChargingTestCase {
            public static void main(String[] args) {
                try {
                    CallChargingServiceStub callChargingServiceStub = new CallChargingServiceStub("http://localhost:9763/services/CallChargingService");
    
                    CallChargeE callChargeRequest = new CallChargeE();
                    CallLog callLog = new CallLog();
                    callLog.setPeriod(200);
                    callLog.setType("local");
                    CallLog[] callLogs = new CallLog[1];
                    callLogs[0] = callLog;
    
                    callChargeRequest.setCallLog(callLogs);
    
                    CallCharge[] callCharges = callChargingServiceStub.charge(callLogs);
                    if(callCharges != null){
                        for (CallCharge callCharge : callCharges){
                            System.out.println("Tha charge for the call : " + callCharge.getAmount());
    
                        }
                    }
                } catch (AxisFault axisFault) {
                    axisFault.printStackTrace();
                } catch (RemoteException e) {
                    e.printStackTrace();
                }
    
            }
        }
    Excerpt
    hiddentrue

    Call charging service sample of the WSO2 Business Rules Server samples guide.

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