Activiti错误开始事件入门实例

BPMN2.0规定了错误开始事件只能使用在事件子流程（Event Sub-Process）中，该该事件不能使用在其他流程中，包括最高级流程（Top-Level Process）、嵌套子流程（Sub-Process）和调用子流程（Call Activity）。

错误消息开始事件图标：

实例流程图：

启动一个流程，然后执行“Service Task”java服务类，但是该服务类抛出了异常信息。此时被事件子流程的错误开始事件捕获，启动事件子流程，然后执行“Sub Task”java服务类。

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流程XML定义：

<?xml version="1.0" encoding="UTF-8"?>
<definitions xmlns="https://www.omg.org/spec/BPMN/20100524/MODEL" xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance" xmlns:activiti="https://activiti.org/bpmn" xmlns:bpmndi="https://www.omg.org/spec/BPMN/20100524/DI" xmlns:omgdc="https://www.omg.org/spec/DD/20100524/DC" xmlns:omgdi="https://www.omg.org/spec/DD/20100524/DI" typeLanguage="https://www.w3.org/2001/XMLSchema" expressionLanguage="https://www.w3.org/1999/XPath" targetNamespace="https://www.activiti.org/processdef">
  
  <error id="errorId" errorCode="MyErrorCode"></error>
  
  <process id="errorStartEventTest01" name="错误开始事件测试01" isExecutable="true">
    
    <startEvent id="start"></startEvent>
    <serviceTask id="serviceTask01" name="Service Task" activiti:class="com.bug315.event.ErrorStartEventDelegate"></serviceTask>
    <endEvent id="end"></endEvent>
    
    <sequenceFlow id="sid-1EAADC30-396A-4E19-B181-C688B909510B" sourceRef="serviceTask01" targetRef="end"></sequenceFlow>
    <sequenceFlow id="sid-07875D4F-D2C7-47E0-B4C3-6866F110206F" sourceRef="start" targetRef="serviceTask01"></sequenceFlow>
    
    <subProcess id="sid-DDBC6BA0-A097-4FC9-8023-C40E6AD0B499" name="subProcess" triggeredByEvent="true">
      <startEvent id="subStart">
          <errorEventDefinition errorRef="errorId"></errorEventDefinition>
      </startEvent>
      <serviceTask id="subServiceTask01" name="Sub Task" activiti:class="com.bug315.event.ErrorHandlerDelegate"></serviceTask>
      <endEvent id="subEnd"></endEvent>
      <sequenceFlow id="sid-24413ADF-BD05-4BB7-9FA8-E70154B94767" sourceRef="subServiceTask01" targetRef="subEnd"></sequenceFlow>
      <sequenceFlow id="sid-A130E45F-9A0B-4362-908E-C8FEB3F640E7" sourceRef="subStart" targetRef="subServiceTask01"></sequenceFlow>
    </subProcess>
  </process>
  
  <bpmndi:BPMNDiagram id="BPMNDiagram_errorStartEventTest01">
    <bpmndi:BPMNPlane bpmnElement="errorStartEventTest01" id="BPMNPlane_errorStartEventTest01">
      <bpmndi:BPMNShape bpmnElement="start" id="BPMNShape_start">
        <omgdc:Bounds height="30.0" width="30.0" x="205.0" y="237.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="serviceTask01" id="BPMNShape_serviceTask01">
        <omgdc:Bounds height="80.0" width="100.0" x="290.0" y="212.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="end" id="BPMNShape_end">
        <omgdc:Bounds height="28.0" width="28.0" x="440.0" y="238.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="sid-DDBC6BA0-A097-4FC9-8023-C40E6AD0B499" id="BPMNShape_sid-DDBC6BA0-A097-4FC9-8023-C40E6AD0B499">
        <omgdc:Bounds height="145.0" width="328.0" x="168.0" y="44.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="subStart" id="BPMNShape_subStart">
        <omgdc:Bounds height="30.0" width="30.0" x="203.0" y="99.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="subServiceTask01" id="BPMNShape_subServiceTask01">
        <omgdc:Bounds height="80.0" width="100.0" x="288.0" y="74.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="subEnd" id="BPMNShape_subEnd">
        <omgdc:Bounds height="28.0" width="28.0" x="438.0" y="100.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNEdge bpmnElement="sid-07875D4F-D2C7-47E0-B4C3-6866F110206F" id="BPMNEdge_sid-07875D4F-D2C7-47E0-B4C3-6866F110206F">
        <omgdi:waypoint x="235.0" y="252.0"></omgdi:waypoint>
        <omgdi:waypoint x="290.0" y="252.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="sid-1EAADC30-396A-4E19-B181-C688B909510B" id="BPMNEdge_sid-1EAADC30-396A-4E19-B181-C688B909510B">
        <omgdi:waypoint x="390.0" y="252.0"></omgdi:waypoint>
        <omgdi:waypoint x="440.0" y="252.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="sid-A130E45F-9A0B-4362-908E-C8FEB3F640E7" id="BPMNEdge_sid-A130E45F-9A0B-4362-908E-C8FEB3F640E7">
        <omgdi:waypoint x="233.0" y="114.0"></omgdi:waypoint>
        <omgdi:waypoint x="288.0" y="114.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="sid-24413ADF-BD05-4BB7-9FA8-E70154B94767" id="BPMNEdge_sid-24413ADF-BD05-4BB7-9FA8-E70154B94767">
        <omgdi:waypoint x="388.0" y="114.0"></omgdi:waypoint>
        <omgdi:waypoint x="438.0" y="114.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
    </bpmndi:BPMNPlane>
  </bpmndi:BPMNDiagram>
</definitions>

Activiti配置文件：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="https://www.springframework.org/schema/beans"
	xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="https://www.springframework.org/schema/beans
		https://www.springframework.org/schema/beans/spring-beans-3.1.xsd">
	
	<bean id="processEngineConfiguration"  
        class="org.activiti.engine.impl.cfg.StandaloneProcessEngineConfiguration">
        <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/activiti" />
        <property name="jdbcDriver" value="com.mysql.jdbc.Driver" />
        <property name="jdbcUsername" value="root" />
        <property name="jdbcPassword" value="aaaaaa" />
        <property name="jobExecutorActivate" value="true" />
        <property name="databaseType" value="mysql"/>
        <property name="databaseSchemaUpdate" value="true" />
        <property name="history" value="full"/>
    </bean>
    
</beans>

Java客户端代码：

ErrorHandlerDelegate.java

package com.bug315.event;

import org.activiti.engine.delegate.DelegateExecution;
import org.activiti.engine.delegate.JavaDelegate;

/**
 * 错误处理Delegate
 * @author Administrator
 *
 */
public class ErrorHandlerDelegate implements JavaDelegate {

	@Override
	public void execute(DelegateExecution execution) throws Exception {
		System.out.println("ErrorHandlerDelegate ---> execute");
	}

}

ErrorStartEventDelegate.java

package com.bug315.event;

import org.activiti.engine.delegate.BpmnError;
import org.activiti.engine.delegate.DelegateExecution;
import org.activiti.engine.delegate.JavaDelegate;

/**
 * 错误开始事件处理Delegate
 * @author Administrator
 *
 */
public class ErrorStartEventDelegate implements JavaDelegate {

	@Override
	public void execute(DelegateExecution execution) throws Exception {
		System.out.println("ErrorStartEventDelegate ----> execute");
		throw new BpmnError("MyErrorCode");
	}

}

ErrorStartEventTest01.java

package com.bug315.event;

import org.activiti.engine.ProcessEngine;
import org.activiti.engine.ProcessEngines;
import org.activiti.engine.RepositoryService;

/**
 * 错误开始事件
 * @author Administrator
 *
 */
public class ErrorStartEventTest01 {

	public static void main(String[] args) {
		ProcessEngine engine = ProcessEngines.getDefaultProcessEngine();
		RepositoryService repositoryService = engine.getRepositoryService();
		repositoryService.createDeployment().addClasspathResource("bpmn/errorStartEventTest01.bpmn20.xml").deploy();
		engine.getRuntimeService().startProcessInstanceByKey("errorStartEventTest01");
	}
}