Java 流口水-如何找出所有规则都匹配?
我有一个.DRL文件,上面有10条规则。一旦我插入一个事实,一些规则可能会被匹配-我如何找出哪些规则是以编程方式匹配的 在DRL文件中将方言更改为JAVA 插入一个从java文件到DRL文件的HashMap(使用Drools会话概念), 其中应包含规则名称作为键,布尔值作为结果 按照此操作了解如何将映射插入到DRL文件 您现在可以找到完全匹配的规则 希望这能有所帮助:)请注意,这个答案对Drools高达5.x的版本有效。如果您已经转到6或更高级别,请查看@melchoir55的修改答案。我还没有亲自测试过,但我相信它能工作 要跟踪规则激活,可以使用AgendaEventListener。下面是一个示例,如下所示: 您只需创建这样一个侦听器并将其连接到会话,如下所示:Java 流口水-如何找出所有规则都匹配?,java,drools,rule-engine,Java,Drools,Rule Engine,我有一个.DRL文件,上面有10条规则。一旦我插入一个事实,一些规则可能会被匹配-我如何找出哪些规则是以编程方式匹配的 在DRL文件中将方言更改为JAVA 插入一个从java文件到DRL文件的HashMap(使用Drools会话概念), 其中应包含规则名称作为键,布尔值作为结果 按照此操作了解如何将映射插入到DRL文件 您现在可以找到完全匹配的规则 希望这能有所帮助:)请注意,这个答案对Drools高达5.x的版本有效。如果您已经转到6或更高级别,请查看@melchoir55的修改答案。我还没有
ksession = kbase.newStatefulKnowledgeSession();
AgendaEventListener agendaEventListener = new TrackingAgendaEventListener();
ksession.addEventListener(agendaEventListener);
//...
ksession.fireAllRules();
//...
List<Activation> activations = agendaEventListener.getActivationList();
ksession=kbase.newStatefulKnowledgeSession();
AgendaEventListener AgendaEventListener=new TrackingAgendaEventListener();
ksSession.addEventListener(代理EventListener);
//...
ksession.fireAllRules();
//...
List activations=agendaEventListener.getActivationList();
请注意,还有WorkingMemoryEventListener,它使您能够跟踪事实的插入、更新和收回
跟踪和日志记录代理DaEventListener的代码:
package com.sctrcd.drools.util;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import org.drools.definition.rule.Rule;
import org.drools.event.rule.DefaultAgendaEventListener;
import org.drools.event.rule.AfterActivationFiredEvent;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* A listener that will track all rule firings in a session.
*
* @author Stephen Masters
*/
public class TrackingAgendaEventListener extends DefaultAgendaEventListener {
private static Logger log = LoggerFactory.getLogger(TrackingAgendaEventListener.class);
private List<Activation> activationList = new ArrayList<Activation>();
@Override
public void afterActivationFired(AfterActivationFiredEvent event) {
Rule rule = event.getActivation().getRule();
String ruleName = rule.getName();
Map<String, Object> ruleMetaDataMap = rule.getMetaData();
activationList.add(new Activation(ruleName));
StringBuilder sb = new StringBuilder("Rule fired: " + ruleName);
if (ruleMetaDataMap.size() > 0) {
sb.append("\n With [" + ruleMetaDataMap.size() + "] meta-data:");
for (String key : ruleMetaDataMap.keySet()) {
sb.append("\n key=" + key + ", value="
+ ruleMetaDataMap.get(key));
}
}
log.debug(sb.toString());
}
public boolean isRuleFired(String ruleName) {
for (Activation a : activationList) {
if (a.getRuleName().equals(ruleName)) {
return true;
}
}
return false;
}
public void reset() {
activationList.clear();
}
public final List<Activation> getActivationList() {
return activationList;
}
public String activationsToString() {
if (activationList.size() == 0) {
return "No activations occurred.";
} else {
StringBuilder sb = new StringBuilder("Activations: ");
for (Activation activation : activationList) {
sb.append("\n rule: ").append(activation.getRuleName());
}
return sb.toString();
}
}
}
package com.sctrcd.drools.util;
导入java.util.ArrayList;
导入java.util.List;
导入java.util.Map;
导入org.drools.definition.rule.rule;
导入org.drools.event.rule.DefaultAgendaEventListener;
导入org.drools.event.rule.afterActivationFileEvent;
导入org.slf4j.Logger;
导入org.slf4j.LoggerFactory;
/**
*跟踪会话中所有规则触发的侦听器。
*
*@作者斯蒂芬·马斯特斯
*/
公共类跟踪GendaEventListener扩展DefaultAgendaEventListener{
私有静态记录器log=LoggerFactory.getLogger(TrackingAgendaEventListener.class);
私有列表激活列表=新建ArrayList();
@凌驾
公共无效后激活事件(后激活事件){
规则规则=event.getActivation().getRule();
字符串ruleName=rule.getName();
Map ruleMetaDataMap=rule.getMetaData();
activationList.add(新激活(规则名));
StringBuilder sb=新的StringBuilder(“触发规则:+ruleName”);
if(ruleMetaDataMap.size()>0){
sb.追加(“\n带有[”+ruleMetaDataMap.size()+“]元数据:”);
for(字符串键:ruleMetaDataMap.keySet()){
sb.追加(“\n key=“+key+”,value=”
+ruleMetaDataMap.get(key));
}
}
log.debug(sb.toString());
}
公共布尔值isRuleFired(字符串ruleName){
用于(激活a:激活列表){
如果(a.getRuleName().equals(ruleName)){
返回true;
}
}
返回false;
}
公共无效重置(){
activationList.clear();
}
公共最终列表getActivationList(){
返回激活列表;
}
公共字符串激活ToString(){
if(activationList.size()=0){
return“未发生任何激活。”;
}否则{
StringBuilder sb=新StringBuilder(“激活:”);
用于(激活:激活列表){
sb.append(“\n规则:”).append(activation.getRuleName());
}
使某人返回字符串();
}
}
}
您可以使用静态记录器工厂,该工厂将使用您喜爱的记录器记录DRL文件中的操作
例如:
import org.drools.runtime.rule.RuleContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public final class DRLLogger {
private DRLLogger() {
}
protected static Logger getLogger(final RuleContext drools) {
final String category = drools.getRule().getPackageName() + "." + drools.getRule().getName();
final Logger logger = LoggerFactory.getLogger(category);
return logger;
}
public static void info(final RuleContext drools, final String message, final Object... parameters) {
final Logger logger = getLogger(drools);
logger.info(message, parameters);
}
public static void debug(final RuleContext drools, final String message, final Object... parameters) {
final Logger logger = getLogger(drools);
logger.debug(message, parameters);
}
public static void error(final RuleContext drools, final String message, final Object... parameters) {
final Logger logger = getLogger(drools);
logger.error(message, parameters);
}
}
然后从您的DRL文件:
import function com.mycompany.DRLLogger.*
rule "myrule"
when
$fact: Fact()
then
info(drools, "Fact:{}", $fact);
end
Steve的答案是肯定的,但drools 6带来的主要变化使代码过时。我在下面发布了Steve代码的重写,其中考虑了新api:
package your.preferred.package;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import org.drools.core.event.DefaultAgendaEventListener;
import org.kie.api.definition.rule.Rule;
import org.kie.api.event.rule.AfterMatchFiredEvent;
import org.kie.api.runtime.rule.Match;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* A listener that will track all rule firings in a session.
*
* @author Stephen Masters, Isaac Martin
*/
public class TrackingAgendaEventListener extends DefaultAgendaEventListener {
private static Logger log = LoggerFactory.getLogger(TrackingAgendaEventListener.class);
private List<Match> matchList = new ArrayList<Match>();
@Override
public void afterMatchFired(AfterMatchFiredEvent event) {
Rule rule = event.getMatch().getRule();
String ruleName = rule.getName();
Map<String, Object> ruleMetaDataMap = rule.getMetaData();
matchList.add(event.getMatch());
StringBuilder sb = new StringBuilder("Rule fired: " + ruleName);
if (ruleMetaDataMap.size() > 0) {
sb.append("\n With [" + ruleMetaDataMap.size() + "] meta-data:");
for (String key : ruleMetaDataMap.keySet()) {
sb.append("\n key=" + key + ", value="
+ ruleMetaDataMap.get(key));
}
}
log.debug(sb.toString());
}
public boolean isRuleFired(String ruleName) {
for (Match a : matchList) {
if (a.getRule().getName().equals(ruleName)) {
return true;
}
}
return false;
}
public void reset() {
matchList.clear();
}
public final List<Match> getMatchList() {
return matchList;
}
public String matchsToString() {
if (matchList.size() == 0) {
return "No matchs occurred.";
} else {
StringBuilder sb = new StringBuilder("Matchs: ");
for (Match match : matchList) {
sb.append("\n rule: ").append(match.getRule().getName());
}
return sb.toString();
}
}
}
打包您的.preferred.package;
导入java.util.ArrayList;
导入java.util.List;
导入java.util.Map;
导入org.drools.core.event.DefaultAgendaEventListener;
导入org.kie.api.definition.rule.rule;
导入org.kie.api.event.rule.AfterMatchFiredEvent;
导入org.kie.api.runtime.rule.Match;
导入org.slf4j.Logger;
导入org.slf4j.LoggerFactory;
/**
*跟踪会话中所有规则触发的侦听器。
*
*@作者斯蒂芬·马斯特斯,艾萨克·马丁
*/
公共类跟踪GendaEventListener扩展DefaultAgendaEventListener{
私有静态记录器log=LoggerFactory.getLogger(TrackingAgendaEventListener.class);
私有列表匹配列表=新的ArrayList();
@凌驾
公共无效afterMatchFired(AfterMatchFiredEvent事件){
Rule Rule=event.getMatch().getRule();
字符串ruleName=rule.getName();
Map ruleMetaDataMap=rule.getMetaData();
add(event.getMatch());
StringBuilder sb=新的StringBuilder(“触发规则:+ruleName”);
if(ruleMetaDataMap.size()>0){
sb.追加(“\n带有[”+ruleMetaDataMap.size()+“]元数据:”);
for(字符串键:ruleMetaDataMap.keySet()){
sb.追加(“\n key=“+key+”,value=”
+ruleMetaDataMap.get(key));
}
}
log.debug(sb.toString());
}
公共布尔值isRuleFired(字符串ruleName){
用于(匹配a:匹配列表){
如果(a.getRule().getName().equals(ruleName)){
返回true;
}
}
返回false;
}
公共无效重置(){
matchList.clear();
}
公共最终列表getMatchList(){
返回匹配列表;
}
公共字符串匹配stostring(){
if(matchList.size()==0){
return“未发生匹配。”;
}否则{
StringBuilder sb=新的StringBuilder(“匹配:”);
用于(匹配:匹配列表){
sb.append(“\n规则:”).append
System.out.println(drools.getRule().getName())