定时中间事件指在流程中将一个定时器作为独立的节点来运行。当流程到达定时中间事件节点的时候，流程会等待事件到达，只有当事件到达了才会触发定时事件，然后流程继续向下走。下面定义了一个简单的流程来测试如何使用定时中间事件。
定时中间事件图标：
实例流程图：
启动流程进入“接收订单”，然后进入定时器（等待1分钟）。如果时间到时触发定时器，然后进入“发货”任务，最后完成流程。
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:xsd="https://www.w3.org/2001/XMLSchema" 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"> <process id="timerIntermediateEventTest01" name="定时器中间事件测试01" isExecutable="true"> <startEvent id="start"></startEvent> <userTask id="task01" name="接收订单"></userTask> <!-- 定时器中间事件 --> <intermediateCatchEvent id="timer01"> <timerEventDefinition> <timeDuration>PT1M</timeDuration> </timerEventDefinition> </intermediateCatchEvent> <userTask id="task02" name="发货"></userTask> <endEvent id="end"></endEvent> <sequenceFlow id="f2" sourceRef="task01" targetRef="timer01"></sequenceFlow> <sequenceFlow id="f3" sourceRef="timer01" targetRef="task02"></sequenceFlow> <sequenceFlow id="f4" sourceRef="task02" targetRef="end"></sequenceFlow> <sequenceFlow id="f1" sourceRef="start" targetRef="task01"></sequenceFlow> </process> <bpmndi:BPMNDiagram id="BPMNDiagram_timerIntermediateEventTest01"> <bpmndi:BPMNPlane bpmnElement="timerIntermediateEventTest01" id="BPMNPlane_timerIntermediateEventTest01"> <bpmndi:BPMNShape bpmnElement="start" id="BPMNShape_start"> <omgdc:Bounds height="30.0" width="30.0" x="135.0" y="78.0"></omgdc:Bounds> </bpmndi:BPMNShape> <bpmndi:BPMNShape bpmnElement="task01" id="BPMNShape_task01"> <omgdc:Bounds height="80.0" width="100.0" x="215.25" y="53.0"></omgdc:Bounds> </bpmndi:BPMNShape> <bpmndi:BPMNShape bpmnElement="timer01" id="BPMNShape_timer01"> <omgdc:Bounds height="31.0" width="31.0" x="360.0" y="77.5"></omgdc:Bounds> </bpmndi:BPMNShape> <bpmndi:BPMNShape bpmnElement="task02" id="BPMNShape_task02"> <omgdc:Bounds height="80.0" width="100.0" x="435.0" y="53.0"></omgdc:Bounds> </bpmndi:BPMNShape> <bpmndi:BPMNShape bpmnElement="end" id="BPMNShape_end"> <omgdc:Bounds height="28.0" width="28.0" x="585.0" y="79.0"></omgdc:Bounds> </bpmndi:BPMNShape> <bpmndi:BPMNEdge bpmnElement="f1" id="BPMNEdge_f1"> <omgdi:waypoint x="165.0" y="93.0"></omgdi:waypoint> <omgdi:waypoint x="215.25" y="93.0"></omgdi:waypoint> </bpmndi:BPMNEdge> <bpmndi:BPMNEdge bpmnElement="f3" id="BPMNEdge_f3"> <omgdi:waypoint x="391.9998316666579" y="93.42660627675845"></omgdi:waypoint> <omgdi:waypoint x="435.0" y="93.22935779816514"></omgdi:waypoint> </bpmndi:BPMNEdge> <bpmndi:BPMNEdge bpmnElement="f2" id="BPMNEdge_f2"> <omgdi:waypoint x="315.25" y="93.0"></omgdi:waypoint> <omgdi:waypoint x="360.0" y="93.0"></omgdi:waypoint> </bpmndi:BPMNEdge> <bpmndi:BPMNEdge bpmnElement="f4" id="BPMNEdge_f4"> <omgdi:waypoint x="535.0" y="93.0"></omgdi:waypoint> <omgdi:waypoint x="585.0" y="93.0"></omgdi:waypoint> </bpmndi:BPMNEdge> </bpmndi:BPMNPlane> </bpmndi:BPMNDiagram> </definitions>
Java客户端代码：
package com.bug315.event;
import org.activiti.engine.ProcessEngine;
import org.activiti.engine.ProcessEngines;
import org.activiti.engine.TaskService;
import org.activiti.engine.task.Task;
import org.activiti.engine.task.TaskQuery;
/**
* 定时器中间事件测试
* @author Administrator
*
*/
public class TimerIntermediateEventTest01 {
public static void main(String[] args) throws Exception {
ProcessEngine engine = ProcessEngines.getDefaultProcessEngine();
engine.getRepositoryService().createDeployment()
.addClasspathResource("bpmn/timerIntermediateEventTest01.bpmn20.xml").deploy();
engine.getRuntimeService().startProcessInstanceByKey("timerIntermediateEventTest01");
TaskService taskService = engine.getTaskService();
TaskQuery taskQuery = taskService.createTaskQuery();
Task task = taskQuery.singleResult();
System.out.println("task name: " + task.getName());
taskService.complete(task.getId());
System.out.println("暂停70秒钟");
Thread.sleep(1000 * 70);
task = taskQuery.singleResult();
System.out.println("task name: " + task.getName());
taskService.complete(task.getId());
}
}注意事项：
1、使用定时器必须启动JobExecutor （设置activiti.cfg.xml配置中jobExecutorActivate=true）
2、该事件会一直等待被触发
