11-jbpm工作流之"事件处理Event"

心已赠人 2022-01-11 09:59 242阅读 0赞

Jbpm的事件处理：

是通过在test.jpdl.xml中配置事件节点来处理的：

注意：开始活动只有离开事件，结束活动只有进入事件

进入活动事件：

离开活动事件：

流程图：test.png

![SouthEast][]

流程图配置文件test.jpdl.xml：通过配置事件处理类来实现事件驱动：EventListenerImpl.java实现EventListener接口

<?xml version="1.0" encoding="UTF-8"?>
    
    <process name="test" xmlns="http://jbpm.org/4.4/jpdl">
    	<on event="start">
    		<event-listener class="cn.edu.zust.itee.event.EventListenerImpl"/>
    	</on>
    	<on event="end">
    		<event-listener class="cn.edu.zust.itee.event.EventListenerImpl"/>
    	</on>
    	<start g="295,82,48,48" name="start1">
    		<on event="end">
    			<event-listener class="cn.edu.zust.itee.event.EventListenerImpl"/>
    		</on>
    		<transition g="-93,-22" name="to 部门经理审批" to="部门经理审批"/>
    	</start>
    	<task assignee="部门经理" g="277,183,92,52" name="部门经理审批">
    		<on event="start">
    			<event-listener class="cn.edu.zust.itee.event.EventListenerImpl"/>
    		</on>
    		<on event="end">
    			<event-listener class="cn.edu.zust.itee.event.EventListenerImpl"/>
    		</on>
    		<transition g="-81,-22" name="to 总经理审批" to="总经理审批"/>
    		<transition g="-50,-22" name="to end1" to="end1"/>
    	</task>
    	<task assignee="总经理" g="424,259,92,52" name="总经理审批">
    		<on event="start">
    			<event-listener class="cn.edu.zust.itee.event.EventListenerImpl"/>
    		</on>
    		<on event="end">
    			<event-listener class="cn.edu.zust.itee.event.EventListenerImpl"/>
    		</on>
    		<transition g="-50,-22" name="to end1" to="end1"/>
    	</task>
    	<end g="289,380,48,48" name="end1">
    		<on event="start">
    			<event-listener class="cn.edu.zust.itee.event.EventListenerImpl"/>
    		</on>
    
    	</end>
    </process>

事件处理类：EventListenerImpl.java

package cn.edu.zust.itee.event;
    
    import org.jbpm.api.listener.EventListener;
    import org.jbpm.api.listener.EventListenerExecution;
    
    /**
     * @author 郑勇
     * 2013-7-11 16:05
     * 处理事件类
     */
    public class EventListenerImpl implements EventListener {
    
    	@Override
    	public void notify(EventListenerExecution execution) throws Exception {
           System.out.println("触发事件了---：当前正在执行的事件是"+execution.getActivity());
    	}
    
    }

测试类：

package cn.edu.zust.itee.event;
    
    import java.io.InputStream;
    
    import org.jbpm.api.Configuration;
    import org.jbpm.api.ProcessEngine;
    import org.jbpm.api.ProcessInstance;
    import org.junit.Test;
    
    /**
     * @author Bob
     * 2013-07-11 16:03
     * 事件处理
     */
    public class ProcessEvent {
    
    	ProcessEngine processEngine = Configuration.getProcessEngine();
    	
    	@Test
    	public void testProcessEvent(){
    		
    		//部署流程定义
    		//获得当前包中的文件
    		InputStream in = this.getClass().getResourceAsStream("test.jpdl.xml");
    		processEngine.getRepositoryService()
    		             .createDeployment()
    		             .addResourceFromInputStream("test.jpdl.xml", in)
    		             .deploy();
    											
    		
    		//启动流程实例
    		ProcessInstance pi = processEngine.getExecutionService()
    					 .startProcessInstanceByKey("test");
    		
    		
    		//完成"部门经理任务"，并使用指定连线离开当前活动
    		String taskId = processEngine.getTaskService().createTaskQuery() //查询出该流程实例中仅有的一个任务
    									  .processInstanceId(pi.getId())
    									  .uniqueResult()
    									  .getId();
    		//活动中都是可以有1个或多个Transition，需要指定不同的名称
    		processEngine.getTaskService().completeTask(taskId,"to 总经理审批");
    	}
    }

测试结果：

![SouthEast 1][]

[SouthEast]: /images/20220110/7e9a2ddd08f0498cb2f49c98fbd92d44.png
[SouthEast 1]: /images/20220110/a945f2ee78b84414b55f602172b2ca21.png