Drools7.5.0教程（10）-drools规则流的使用
2017-12-04 20:05
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Drools7.5.0教程（10）-drools规则流的使用
drools,是由JBOSS公司开源的一套基于JAVA的规则引擎系统什么是规则流，规则流什么用？
规则流能够控制，规则中的复杂流程，在复杂业务中，很多时候并不需要触发所有的规则，很多时候需要触发的规则也需要，像程序一样，符合某些逻辑，如，当X对象X 属性等于 A 时，触发 规则A 中的规则，当等于B时，触发规则B中的规则，这时候用规则流就能够很好的处理，这类问题。规则流怎么使用
如何使用规则流？那我们就来写个例子来尝试下吧！我们还用老例子，输入一个分数，我们判断一个水平，如：60分 及格，70-90分优秀 ，然后我们根据判断结果打印出对应的语句。项目结构
创建实体类
package com.sample;
public class ScoreRule {
//分数
private Integer score;
//注释
private String desc;
public Integer getScore() {
return score;
}
public void setScore(Integer score) {
this.score = score;
}
public String getDesc() {
return desc;
}
public void setDesc(String desc) {
this.desc = desc;
}
}创建规则文件，直接贴代码
package com.sample import com.sample.ScoreRule; //执行之后不重复执行 no-loop //规则名 rule "no-pass"//没过 //规则组名 ruleflow-group "score" when s: ScoreRule( score<60 ) then s.setDesc( "no-pass" ); update( s ); end rule "pass"//及格 ruleflow-group "score" when s: ScoreRule( score>=60&&score<70 ) then s.setDesc( "pass" ); update( s ); end rule "good"//良好 ruleflow-group "score" when s: ScoreRule( score>=70&&score<90 ) then s.setDesc( "good" ); update( s ); end rule "excellent"//优秀 ruleflow-group "score" when s: ScoreRule( score>=90&&score<100 ) then s.setDesc( "excellent" ); update( s ); end rule "perfect"//完美 ruleflow-group "score" when s: ScoreRule( score==100 ) then s.setDesc( "perfect" ); update( s ); end
修改kmodule.xml 文件
<?xml version="1.0" encoding="UTF-8"?> <kmodule xmlns="http://jboss.org/kie/6.0.0/kmodule"> <kbase name="process" packages="process"> <ksession name="ksession-process"/> </kbase> </kmodule>
新建规则流文件 sample.bpmn
指定规则文件相关属性：
流程中指定，分数校验模块的规则组：
设置网关的判断条件：
编辑各条网关连接线的判断依据：
编辑分支流程继续执行的任务，在这，仅执行一个打印任务：
好了，我们可以编写测试代码了，代码如下：
package com.sample;
import org.kie.api.KieServices;
import org.kie.api.runtime.KieContainer;
import org.kie.api.runtime.KieSession;
/**
* This is a sample file to launch a process.
*/
public class ProcessTest {
public static final void main(String[] args) {
try {
KieServices ks = KieServices.Factory.get();
KieContainer kContainer = ks.getKieClasspathContainer();
KieSession kSession = kContainer.newKieSession("ksession-process");
//编写fact对象
ScoreRule rule=new ScoreRule();
rule.setScore(75);
kSession.insert(rule);
//执行所要执行的流程
kSession.startProcess("com.sample.bpmn.scorerule");
kSession.fireAllRules();
} catch (Throwable t) {
t.printStackTrace();
}
}
}好，我们来看看结果吧
没错，正确了执行了规则流，当然这个规则流非常简单，大家可以继续尝试更复杂的组件哦，最后，贴下，整个bpmn的代码，供大家参考
<?xml version="1.0" encoding="UTF-8"?>
<definitions id="Definition"
targetNamespace="http://www.jboss.org/drools"
typeLanguage="http://www.java.com/javaTypes"
expressionLanguage="http://www.mvel.org/2.0"
xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.omg.org/spec/BPMN/20100524/MODEL BPMN20.xsd"
xmlns:g="http://www.jboss.org/drools/flow/gpd"
xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI"
xmlns:dc="http://www.omg.org/spec/DD/20100524/DC"
xmlns:di="http://www.omg.org/spec/DD/20100524/DI"
xmlns:tns="http://www.jboss.org/drools">
<process processType="Private" isExecutable="true" id="com.sample.bpmn.scorerule" name="ScoreRule" tns:packageName="com.sample" >
<!-- nodes -->
<startEvent id="_1" isInterrupting="true">
</startEvent>
<endEvent id="_3" >
<terminateEventDefinition />
</endEvent>
<businessRuleTask id="bbb899bd-5f36-4cae-89b6-0b89853a8192" name="分数校验" g:ruleFlowGroup="score"
implementation="http://www.jboss.org/drools/rule" >
<ioSpecification>
<inputSet>
</inputSet>
<outputSet>
</outputSet>
</ioSpecification>
</businessRuleTask>
<exclusiveGateway id="91cef05a-2603-4018-88ab-d6922ec1f808" name="Gateway" gatewayDirection="Diverging" >
</exclusiveGateway>
<scriptTask id="5f6b8b61-685e-4c20-a9b8-bd3e65cc8a4e" name="Script" scriptFormat="http://www.java.com/java" >
<script>System.out.println("恭喜你已经及格");</script>
</scriptTask>
<scriptTask id="084929f2-2d04-45cb-ba3d-ea2755ac402c" name="Script" >
<script>System.out.println("您的成绩是良好");</script>
</scriptTask>
<scriptTask id="54b211e0-c635-4fca-a7b8-4025a05cb3d3" name="Script" >
<script>System.out.println("优秀优秀！！！！");</script>
</scriptTask>
<scriptTask id="840beb7c-37a2-462b-a216-ae80b277ed21" name="Script" >
<script>System.out.println("恭喜您，满分！");</script>
</scriptTask>
<scriptTask id="6d8d6cc7-a04f-4158-8abb-ea85dc0d4c29" name="Script" scriptFormat="http://www.java.com/java" >
<script>System.out.println("你没及格！");</script>
</scriptTask>
<endEvent id="f0ed00b1-39a9-4b27-9234-db4e57beecf9" name="End" >
<terminateEventDefinition />
</endEvent>
<endEvent id="067b5f8a-684d-49fc-9ca2-7c5e125528de" name="End" >
<terminateEventDefinition />
</endEvent>
<endEvent id="d09b3d2e-0483-484f-83be-fd1dedb58b6d" name="End" >
<terminateEventDefinition />
</endEvent>
<endEvent id="b10e26da-6f85-44e1-b49c-7eab1913a1d3" name="End" >
<terminateEventDefinition />
</endEvent>
<!-- connections -->
<sequenceFlow id="6d8d6cc7-a04f-4158-8abb-ea85dc0d4c29-_3" sourceRef="6d8d6cc7-a04f-4158-8abb-ea85dc0d4c29" targetRef="_3" />
<sequenceFlow id="_1-bbb899bd-5f36-4cae-89b6-0b89853a8192" sourceRef="_1" targetRef="bbb899bd-5f36-4cae-89b6-0b89853a8192" />
<sequenceFlow id="bbb899bd-5f36-4cae-89b6-0b89853a8192-91cef05a-2603-4018-88ab-d6922ec1f808" sourceRef="bbb899bd-5f36-4cae-89b6-0b89853a8192" targetRef="91cef05a-2603-4018-88ab-d6922ec1f808" />
<sequenceFlow id="91cef05a-2603-4018-88ab-d6922ec1f808-5f6b8b61-685e-4c20-a9b8-bd3e65cc8a4e" sourceRef="91cef05a-2603-4018-88ab-d6922ec1f808" targetRef="5f6b8b61-685e-4c20-a9b8-bd3e65cc8a4e" name="及格" tns:priority="1" >
<conditionExpression xsi:type="tFormalExpression" language="http://www.jboss.org/drools/rule" >s: ScoreRule( desc=="pass" )</conditionExpression>
</sequenceFlow>
<sequenceFlow id="91cef05a-2603-4018-88ab-d6922ec1f808-084929f2-2d04-45cb-ba3d-ea2755ac402c" sourceRef="91cef05a-2603-4018-88ab-d6922ec1f808" targetRef="084929f2-2d04-45cb-ba3d-ea2755ac402c" name="良好" tns:priority="1" >
<conditionExpression xsi:type="tFormalExpression" language="http://www.jboss.org/drools/rule" >s: ScoreRule( desc=="good" )</conditionExpression>
</sequenceFlow>
<sequenceFlow id="91cef05a-2603-4018-88ab-d6922ec1f808-54b211e0-c635-4fca-a7b8-4025a05cb3d3" sourceRef="91cef05a-2603-4018-88ab-d6922ec1f808" targetRef="54b211e0-c635-4fca-a7b8-4025a05cb3d3" name="优秀" tns:priority="1" >
<conditionExpression xsi:type="tFormalExpression" language="http://www.jboss.org/drools/rule" >s: ScoreRule( desc=="excellent" )</conditionExpression>
</sequenceFlow>
<sequenceFlow id="91cef05a-2603-4018-88ab-d6922ec1f808-840beb7c-37a2-462b-a216-ae80b277ed21" sourceRef="91cef05a-2603-4018-88ab-d6922ec1f808" targetRef="840beb7c-37a2-462b-a216-ae80b277ed21" name="完美" tns:priority="1" >
<conditionExpression xsi:type="tFormalExpression" language="http://www.jboss.org/drools/rule" >s: ScoreRule( desc=="perfect" )</conditionExpression>
</sequenceFlow>
<sequenceFlow id="91cef05a-2603-4018-88ab-d6922ec1f808-6d8d6cc7-a04f-4158-8abb-ea85dc0d4c29" sourceRef="91cef05a-2603-4018-88ab-d6922ec1f808" targetRef="6d8d6cc7-a04f-4158-8abb-ea85dc0d4c29" name="不及格" tns:priority="1" >
<conditionExpression xsi:type="tFormalExpression" language="http://www.jboss.org/drools/rule" >s: ScoreRule( desc=="no-pass" )</conditionExpression>
</sequenceFlow>
<sequenceFlow id="5f6b8b61-685e-4c20-a9b8-bd3e65cc8a4e-f0ed00b1-39a9-4b27-9234-db4e57beecf9" sourceRef="5f6b8b61-685e-4c20-a9b8-bd3e65cc8a4e" targetRef="f0ed00b1-39a9-4b27-9234-db4e57beecf9" />
<sequenceFlow id="084929f2-2d04-45cb-ba3d-ea2755ac402c-067b5f8a-684d-49fc-9ca2-7c5e125528de" sourceRef="084929f2-2d04-45cb-ba3d-ea2755ac402c" targetRef="067b5f8a-684d-49fc-9ca2-7c5e125528de" />
<sequenceFlow id="54b211e0-c635-4fca-a7b8-4025a05cb3d3-d09b3d2e-0483-484f-83be-fd1dedb58b6d" sourceRef="54b211e0-c635-4fca-a7b8-4025a05cb3d3" targetRef="d09b3d2e-0483-484f-83be-fd1dedb58b6d" />
<sequenceFlow id="840beb7c-37a2-462b-a216-ae80b277ed21-b10e26da-6f85-44e1-b49c-7eab1913a1d3" sourceRef="840beb7c-37a2-462b-a216-ae80b277ed21" targetRef="b10e26da-6f85-44e1-b49c-7eab1913a1d3" />
</process>
<bpmndi:BPMNDiagram>
<bpmndi:BPMNPlane bpmnElement="com.sample.bpmn.scorerule" >
<bpmndi:BPMNShape bpmnElement="_1" >
<dc:Bounds x="29" y="173" width="48" height="48" />
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="_3" >
<dc:Bounds x="665" y="19" width="48" height="48" />
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="bbb899bd-5f36-4cae-89b6-0b89853a8192" >
<dc:Bounds x="170" y="173" width="80" height="48" />
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="91cef05a-2603-4018-88ab-d6922ec1f808" >
<dc:Bounds x="354" y="172" width="48" height="48" />
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="5f6b8b61-685e-4c20-a9b8-bd3e65cc8a4e" >
<dc:Bounds x="491" y="98" width="80" height="48" />
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="084929f2-2d04-45cb-ba3d-ea2755ac402c" >
<dc:Bounds x="493" y="170" width="80" height="48" />
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="54b211e0-c635-4fca-a7b8-4025a05cb3d3" >
<dc:Bounds x="496" y="240" width="80" height="48" />
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="840beb7c-37a2-462b-a216-ae80b277ed21" >
<dc:Bounds x="496" y="313" width="80" height="48" />
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="6d8d6cc7-a04f-4158-8abb-ea85dc0d4c29" >
<dc:Bounds x="492" y="22" width="80" height="48" />
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="f0ed00b1-39a9-4b27-9234-db4e57beecf9" >
<dc:Bounds x="670" y="101" width="48" height="48" />
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="067b5f8a-684d-49fc-9ca2-7c5e125528de" >
<dc:Bounds x="671" y="175" width="48" height="48" />
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="d09b3d2e-0483-484f-83be-fd1dedb58b6d" >
<dc:Bounds x="675" y="255" width="48" height="48" />
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="b10e26da-6f85-44e1-b49c-7eab1913a1d3" >
<dc:Bounds x="681" y="326" width="48" height="48" />
</bpmndi:BPMNShape>
<bpmndi:BPMNEdge bpmnElement="6d8d6cc7-a04f-4158-8abb-ea85dc0d4c29-_3" >
<di:waypoint x="532" y="46" />
<di:waypoint x="689" y="43" />
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="_1-bbb899bd-5f36-4cae-89b6-0b89853a8192" >
<di:waypoint x="53" y="197" />
<di:waypoint x="210" y="197" />
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="bbb899bd-5f36-4cae-89b6-0b89853a8192-91cef05a-2603-4018-88ab-d6922ec1f808" >
<di:waypoint x="210" y="197" />
<di:waypoint x="378" y="196" />
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="91cef05a-2603-4018-88ab-d6922ec1f808-5f6b8b61-685e-4c20-a9b8-bd3e65cc8a4e" >
<di:waypoint x="378" y="196" />
<di:waypoint x="531" y="122" />
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="91cef05a-2603-4018-88ab-d6922ec1f808-084929f2-2d04-45cb-ba3d-ea2755ac402c" >
<di:waypoint x="378" y="196" />
<di:waypoint x="533" y="194" />
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="91cef05a-2603-4018-88ab-d6922ec1f808-54b211e0-c635-4fca-a7b8-4025a05cb3d3" >
<di:waypoint x="378" y="196" />
<di:waypoint x="536" y="264" />
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="91cef05a-2603-4018-88ab-d6922ec1f808-840beb7c-37a2-462b-a216-ae80b277ed21" >
<di:waypoint x="378" y="196" />
<di:waypoint x="536" y="337" />
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="91cef05a-2603-4018-88ab-d6922ec1f808-6d8d6cc7-a04f-4158-8abb-ea85dc0d4c29" >
<di:waypoint x="378" y="196" />
<di:waypoint x="532" y="46" />
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="5f6b8b61-685e-4c20-a9b8-bd3e65cc8a4e-f0ed00b1-39a9-4b27-9234-db4e57beecf9" >
<di:waypoint x="531" y="122" />
<di:waypoint x="694" y="125" />
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="084929f2-2d04-45cb-ba3d-ea2755ac402c-067b5f8a-684d-49fc-9ca2-7c5e125528de" >
<di:waypoint x="533" y="194" />
<di:waypoint x="695" y="199" />
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="54b211e0-c635-4fca-a7b8-4025a05cb3d3-d09b3d2e-0483-484f-83be-fd1dedb58b6d" >
<di:waypoint x="536" y="264" />
<di:waypoint x="699" y="279" />
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="840beb7c-37a2-462b-a216-ae80b277ed21-b10e26da-6f85-44e1-b49c-7eab1913a1d3" >
<di:waypoint x="536" y="337" />
<di:waypoint x="705" y="350" />
</bpmndi:BPMNEdge>
</bpmndi:BPMNPlane>
</bpmndi:BPMNDiagram>
</definitions>
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