drools学习3--积分计算例子_drool计算评分-优快云博客

本文介绍了一个基于规则引擎的积分计算系统的设计与实现。该系统能够根据用户的交易行为自动计算并发放积分，涵盖生日奖励、购物金额及次数奖励等多种场景。

我们假定如下情景：网站伴随业务产生而进行的积分发放操作。比如支付宝信用卡还款奖励积分等。
我们定义一下发放规则：
积分的发放参考因素有：交易笔数、交易金额数目、信用卡还款次数、生日特别优惠等。
定义规则：
// 过生日，则加10分，并且将当月交易比数翻倍后再计算积分
// 2011-01-08 - 2011-08-08每月信用卡还款3次以上，每满3笔赠送30分
// 当月购物总金额100以上，每100元赠送10分
// 当月购物次数5次以上，每五次赠送50分
// 特别的，如果全部满足了要求，则额外奖励100分
// 发生退货，扣减10分

// 退货金额大于100，扣减100分

pom.xml,kmdomule.xml请参考上个hello world 例子

源码下载

PointDomain.java

package com.fei.drools.bean;

/**
 * 积分计算对象
 */
public class PointDomain implements java.io.Serializable {
	static final long serialVersionUID = 1L;

	public PointDomain() {}
	// 用户名
	private String userName;
	// 是否当日生日
	private boolean birthDay;
	// 增加积分数目
	private long point;
	// 当月购物次数
	private int buyNums;
	// 当月退货次数
	private int backNums;
	// 当月购物总金额
	private double buyMoney;
	// 当月退货总金额
	private double backMondy;
	// 当月信用卡还款次数
	private int billThisMonth;
	
	/**
	 * 记录积分发送流水，防止重复发放
	 * @param userName 用户名
	 * @param type 积分发放类型
	 */
	public void recordPointLog(String userName, String type){
		System.out.println("增加对"+userName+"的类型为"+type+"的积分操作记录.");
	}

	public String getUserName() {
		return userName;
	}

	public void setUserName(String userName) {
		this.userName = userName;
	}

	public boolean isBirthDay() {
		return birthDay;
	}

	public void setBirthDay(boolean birthDay) {
		this.birthDay = birthDay;
	}

	public long getPoint() {
		return point;
	}

	public void setPoint(long point) {
		this.point = point;
	}

	public int getBuyNums() {
		return buyNums;
	}

	public void setBuyNums(int buyNums) {
		this.buyNums = buyNums;
	}

	public int getBackNums() {
		return backNums;
	}

	public void setBackNums(int backNums) {
		this.backNums = backNums;
	}

	public double getBuyMoney() {
		return buyMoney;
	}

	public void setBuyMoney(double buyMoney) {
		this.buyMoney = buyMoney;
	}

	public double getBackMondy() {
		return backMondy;
	}

	public void setBackMondy(double backMondy) {
		this.backMondy = backMondy;
	}

	public int getBillThisMonth() {
		return billThisMonth;
	}

	public void setBillThisMonth(int billThisMonth) {
		this.billThisMonth = billThisMonth;
	}

}

addpoint.drl

package com.fei.drools;

import com.fei.drools.bean.PointDomain;

rule birthdayPoint
	// 过生日，则加10分，并且将当月交易比数翻倍后再计算积分
	salience 100
	lock-on-active true
	when
		$pointDomain : PointDomain(birthDay == true)
	then
	    System.out.println ( "执行规则: "+drools.getRule().getName());
		$pointDomain.setPoint($pointDomain.getPoint()+100);
		$pointDomain.setBuyNums($pointDomain.getBuyNums()*2);
		$pointDomain.setBuyMoney($pointDomain.getBuyMoney()*2);
		$pointDomain.setBillThisMonth($pointDomain.getBillThisMonth()*2);
		
		$pointDomain.recordPointLog($pointDomain.getUserName(),"birthdayPoint");
end

rule billThisMonthPoint
	// 2016-01-01 - 2016-06-30每月分期还款3次以上，每满3笔赠送30分
	salience 99
	lock-on-active true
	date-effective "31-dec-2015 23:59:59"
	date-expires "30-jun-2016 23:59:59"
	when
		$pointDomain : PointDomain(billThisMonth >= 3)
	then
	    System.out.println ( "执行规则: "+drools.getRule().getName());
		$pointDomain.setPoint($pointDomain.getPoint()+$pointDomain.getBillThisMonth()/3*30);
		$pointDomain.recordPointLog($pointDomain.getUserName(),"billThisMonthPoint");
end

rule buyMoneyPoint
	// 当月购物总金额100以上，每100元赠送10分
	salience 98
	lock-on-active true
	when
		$pointDomain : PointDomain(buyMoney >= 100)
	then
	    System.out.println ( "执行规则: "+drools.getRule().getName());
		$pointDomain.setPoint($pointDomain.getPoint()+ (int)$pointDomain.getBuyMoney()/100 * 10);
		$pointDomain.recordPointLog($pointDomain.getUserName(),"buyMoneyPoint");
end

rule buyNumsPoint
	// 当月购物次数5次以上，每五次赠送50分
	salience 97
	lock-on-active true
	when
		$pointDomain : PointDomain(buyNums >= 5)
	then
	    System.out.println ( "执行规则: "+drools.getRule().getName());
		$pointDomain.setPoint($pointDomain.getPoint()+$pointDomain.getBuyNums()/5 * 50);
		$pointDomain.recordPointLog($pointDomain.getUserName(),"buyNumsPoint");
end

rule allFitPoint
	// 特别的，如果全部满足了要求，则额外奖励100分
	salience 96
	lock-on-active true
	when
		$pointDomain:PointDomain(buyNums >= 5 && billThisMonth >= 3 && buyMoney >= 100)
	then
	    System.out.println ( "执行规则: "+drools.getRule().getName());
		$pointDomain.setPoint($pointDomain.getPoint()+ 100);
		$pointDomain.recordPointLog($pointDomain.getUserName(),"allFitPoint");
end

subpoint.drl

package com.fei.drools;

import com.fei.drools.bean.PointDomain;

rule subBackNumsPoint
	// 发生退货，扣减10分
	salience 10
	lock-on-active true
	when
		$pointDomain : PointDomain(backNums >= 1)
	then
	    System.out.println ( "执行规则: "+drools.getRule().getName());
		$pointDomain.setPoint($pointDomain.getPoint()-10);
		$pointDomain.recordPointLog($pointDomain.getUserName(),"subBackNumsPoint");
end

rule subBackMondyPoint
	// 退货金额大于等于100，扣减100分
	salience 9
	lock-on-active true
	when
		$pointDomain : PointDomain(backMondy >= 100)
	then
	    System.out.println ( "执行规则: "+drools.getRule().getName());
		$pointDomain.setPoint($pointDomain.getPoint()-10);
		$pointDomain.recordPointLog($pointDomain.getUserName(),"subBackMondyPoint");
end

MainTest.java

package com.fei.drools;

import org.kie.api.KieServices;
import org.kie.api.runtime.KieContainer;
import org.kie.api.runtime.KieSession;

import com.fei.drools.bean.Message;
import com.fei.drools.bean.PointDomain;

public class MainTest {

	public static void main(String[] args) {
//		hello();
		point();
	}
	
	public static void hello(){
		
		// load up the knowledge base
		KieServices ks = KieServices.Factory.get();
		KieContainer kContainer = ks.getKieClasspathContainer();
		KieSession kSession = kContainer.newKieSession("ksession-rules");
		
		Message message = new Message();
		message.setMsg("Hello World");
		message.setStatus(Message.HELLO);
		
		kSession.insert(message);
        kSession.fireAllRules();
        kSession.dispose();
	}
	
	public static void point(){
		// load up the knowledge base
		KieServices ks = KieServices.Factory.get();
		KieContainer kContainer = ks.getKieClasspathContainer();
		KieSession kSession = kContainer.newKieSession("ksession-rules");
		
		PointDomain pointDomain = new PointDomain();
		pointDomain.setUserName("ko");
		pointDomain.setBillThisMonth(3);
		pointDomain.setBackMondy(100d);
		pointDomain.setBuyMoney(500d);
		pointDomain.setBackNums(1);
		pointDomain.setBuyNums(5);
		pointDomain.setBirthDay(true);
		pointDomain.setPoint(0l);

		// go !
		kSession.insert(pointDomain);
		kSession.fireAllRules();
		System.out.println("积分 ："+pointDomain.getPoint());
	}
}

运行结果