zbb20170605 Drools java 规则引擎
总体视图
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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
