zbb20170605 Drools java 规则引擎

总体视图

http://pan.baidu.com/disk/home?errno=0&errmsg=Auth%20Login%20Sucess&&bduss=&ssnerror=0#list/path=%2F%E9%87%91%E5%B1%B1%E5%BF%AB%E7%9B%98%E6%96%87%E4%BB%B6%2F%E5%BF%AB%E7%9B%98%2F%E6%88%91%E7%9A%84%E8%B5%84%E6%96%99%2F%E5%AD%A6%E4%B9%A0%E6%96%87%E4%BB%B6%2F%E5%B8%B8%E7%94%A8%E4%BB%A3%E7%A0%81%E6%95%B4%E5%90%88%E4%BF%AE%E6%95%B4%2FDrools&vmode=grid

Test.java

package com.zbb.drools;
import java.util.Scanner;
public class Test {
	public static void main(String[] args) {
		PointRuleEngineImp pointRuleEngineImp = new PointRuleEngineImp();
		PointDomain domain = new PointDomain();
		while (true) {
			Scanner scanner = new Scanner(System.in);
			String nextLine = scanner.nextLine();
			if ("s".equals(nextLine)) {
				System.out.println("初始化规则引擎...");
				pointRuleEngineImp.initEngine();
				System.out.println("初始化规则引擎结束.");
			} else if ("e".equals(nextLine)) {
				domain.setBuyNums(5);
				System.out.println(domain.getPoint());
				pointRuleEngineImp.executeEngine(domain);
				System.out.println(domain.getPoint());
			} else {
				System.out.println("非法输入!");
			}
		}
	}
}

 RuleBaseFacatory.java

package com.zbb.drools;

import org.drools.RuleBase;
import org.drools.RuleBaseFactory;

/**
 * RuleBaseFacatory 单实例RuleBase生成工具
 * @author quzishen
 */
public class RuleBaseFacatory {
	private static RuleBase ruleBase;
	
	public static RuleBase getRuleBase(){
		return null != ruleBase ? ruleBase : RuleBaseFactory.newRuleBase();
	}
}

 PointRuleEngineImp.java

package com.zbb.drools;

import org.drools.RuleBase;
import org.drools.StatefulSession;
import org.drools.compiler.PackageBuilder;
import org.drools.spi.Activation;
import org.drools.spi.AgendaFilter;

public class PointRuleEngineImp implements PointRuleEngine{
	private RuleBase ruleBase;
	@Override
	public void initEngine() {
		// TODO Auto-generated method stub
		//设置事件格式
		System.setProperty("drools.dateformat","yyyy-MM-dd HH:mm:ss");
		ruleBase=RuleBaseFacatory.getRuleBase();
		try {
			PackageBuilder packageBuilderFromDrlFile = DroolsUtil.getPackageBuilderFromDrlFile();
			ruleBase.addPackage(packageBuilderFromDrlFile.getPackage());
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		};
		
		
	}

	@Override
	public void refreshEngine() {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void executeEngine(final PointDomain pointDomain) {
		// TODO Auto-generated method stub
		if(null==ruleBase){
			return ;
		}
		StatefulSession session = ruleBase.newStatefulSession();
		session.insert(pointDomain);
		session.fireAllRules(new AgendaFilter() {
			@Override
			public boolean accept(Activation arg0) {
				// TODO Auto-generated method stub
				return !arg0.getRule().getName().contains("_test");
				
			}
		});
		session.dispose();
	}
	
}

 PointRuleEngine.java

package com.zbb.drools;

public interface PointRuleEngine {
	public void initEngine();
	public void refreshEngine();
	public void executeEngine(final PointDomain pointDomain);
}

 PointDomain.java

package com.zbb.drools;
public class PointDomain {
	private String userName;
	private int account;
	private int buyNums;
	public String getUserName() {
		return userName;
	}
	public void setUserName(String userName) {
		this.userName = userName;
	}
	public int getAccount() {
		return account;
	}
	public void setAccount(int account) {
		this.account = account;
	}
	public int getBuyNums() {
		return buyNums;
	}
	public void setBuyNums(int buyNums) {
		this.buyNums = buyNums;
	}// 增加积分数目
	private long point;
	public long getPoint() {
		return point;
	}
	public void setPoint(long point) {
		this.point = point;
	}
	/**
	 * 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.");
	}
}

 DroolsUtil.java

package com.zbb.drools;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.Reader;
import java.util.ArrayList;
import java.util.List;
import org.drools.compiler.PackageBuilder;
public class DroolsUtil {
	/**
	 * 从drl规则文件中读取规则
	 * 
	 * @throws FileNotFoundException
	 */
	public static PackageBuilder getPackageBuilderFromDrlFile() throws Exception {
		// 获取脚本文件
		List<String> drlFile = getDrlFile();
		// 装载脚本文件
		List<Reader> readRuleFromDrlFile = readRuleFromDrlFile(drlFile);
		PackageBuilder builder = new PackageBuilder();
		for (Reader reader : readRuleFromDrlFile) {
			builder.addPackageFromDrl(reader);
		}
		if (builder.hasErrors()) {
			throw new Exception(builder.getErrors().toString());
		}
		return builder;
	}
	/**
	 * 装载脚本文件
	 * 
	 * @throws FileNotFoundException
	 */
	private static List<Reader> readRuleFromDrlFile(List<String> drlFile) throws FileNotFoundException {
		if (null == drlFile || drlFile.size() == 0) {
			return null;
		}
		List<Reader> readers = new ArrayList<>();
		for (String ss : drlFile) {
			readers.add(new FileReader(new File(ss)));
		}
		return readers;
	}
	/**
	 * 获取规则文件
	 */
	private static List<String> getDrlFile() {
		List<String> drlFilePath = new ArrayList<String>();
		drlFilePath.add(getPath() + "/src/com/zbb/drools/drl/addpoint.drl");
		// drlFilePath.add("E:/azz/drools/drl/subpoint.drl");
		return drlFilePath;
	}
	/**
	 * 获取项目路径
	 * 
	 * @return
	 */
	public static String getPath() {
		File file = new File("");
		System.out.println(file.getAbsolutePath());
		try {
			System.out.println(file.getCanonicalPath());
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return file.getAbsolutePath();
	};
}

 addpoint.drl

package com.zbb.drools
import com.zbb.drools.PointDomain;
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
		$pointDomain.setPoint($pointDomain.getPoint()+$pointDomain.getBuyNums()/5 * 50);
		$pointDomain.recordPointLog($pointDomain.getUserName(),"buyNumsPoint");
end
rule buyNumsPoint2
	// 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
		$pointDomain.setPoint($pointDomain.getPoint()+$pointDomain.getBuyNums()/5 * 50);
		$pointDomain.recordPointLog($pointDomain.getUserName(),"buyNumsPoint");
end

 

转载于:https://www.cnblogs.com/super-admin/p/6945135.html