Activiti6--入门学习--中间事件

1.1 简介

版权声明：本文部分为CSDN博主「司马缸砸缸了」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。
原文链接

1.2 中间事件

中间事件分为两类：中间Cathing事件和中间Throwing事件，当流程到达中间Cathing事件时，它会一直等待知道接收到消息，才会触发。当流程到达中间Throwing事件时，该事件会自动触发并抛出结果。
BPMN2.0中定义的中间Cathing事件有：消息中间事件，定时器中间事件，条件中间事件，连接中间事件，信号中间事件，组合中间事件，并行中间事件等。
中间Throwing事件有：无指定中间事件，消息中间事件，补偿中间事件，连接中间事件，信号中间事件，组合中间事件等。

1.3 定时中间事件

1.3.1 简介

定时器中间事件是一个Catching事件，当执行到达捕获事件节点， 就会启动一个定时器。 当定时器触发（一段时间之后），流程就会沿着定时中间事件的外出节点继续执行。

1.3.2 设计流程图

场景：用户支付成功后等待一分钟，商家发货

流程文件bpmn

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<definitions xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL" xmlns:activiti="http://activiti.org/bpmn" xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI" xmlns:omgdc="http://www.omg.org/spec/DD/20100524/DC" xmlns:omgdi="http://www.omg.org/spec/DD/20100524/DI" xmlns:tns="http://www.activiti.org/test" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" expressionLanguage="http://www.w3.org/1999/XPath" id="m1596009257179" name="" targetNamespace="http://www.activiti.org/test" typeLanguage="http://www.w3.org/2001/XMLSchema">
  <process id="timing" isClosed="false" isExecutable="true" name="Timing" processType="None">
    <startEvent id="_2" name="开始"/>
    <userTask activiti:assignee="user1" activiti:exclusive="true" id="_3" name="支付"/>
    <userTask activiti:assignee="user2" activiti:exclusive="true" id="_4" name="发货"/>
    <endEvent id="_5" name="结束"/>
    <sequenceFlow id="_6" sourceRef="_2" targetRef="_3"/>
    <intermediateCatchEvent id="_7" name="IntermediateCatchingEvent">
      <timerEventDefinition id="_7_ED_1">
        <timeDuration><![CDATA[PT1M]]></timeDuration>
      </timerEventDefinition>
    </intermediateCatchEvent>
    <sequenceFlow id="_8" sourceRef="_3" targetRef="_7"/>
    <sequenceFlow id="_9" sourceRef="_7" targetRef="_4"/>
    <sequenceFlow id="_10" sourceRef="_4" targetRef="_5"/>
  </process>
  <bpmndi:BPMNDiagram documentation="background=#000000;count=1;horizontalcount=1;orientation=0;width=842.4;height=1195.2;imageableWidth=832.4;imageableHeight=1185.2;imageableX=5.0;imageableY=5.0" id="Diagram-_1" name="New Diagram">
    <bpmndi:BPMNPlane bpmnElement="timing">
      <bpmndi:BPMNShape bpmnElement="_2" id="Shape-_2">
        <omgdc:Bounds height="32.0" width="32.0" x="0.0" y="310.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="32.0" width="32.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="_3" id="Shape-_3">
        <omgdc:Bounds height="55.0" width="85.0" x="150.0" y="305.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="55.0" width="85.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="_4" id="Shape-_4">
        <omgdc:Bounds height="55.0" width="85.0" x="380.0" y="305.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="55.0" width="85.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="_5" id="Shape-_5">
        <omgdc:Bounds height="32.0" width="32.0" x="595.0" y="315.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="32.0" width="32.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="_7" id="Shape-_7">
        <omgdc:Bounds height="32.0" width="32.0" x="285.0" y="315.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="32.0" width="32.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNEdge bpmnElement="_6" id="BPMNEdge__6" sourceElement="_2" targetElement="_3">
        <omgdi:waypoint x="32.0" y="326.0"/>
        <omgdi:waypoint x="150.0" y="332.5"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="0.0" width="0.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="_8" id="BPMNEdge__8" sourceElement="_3" targetElement="_7">
        <omgdi:waypoint x="235.0" y="332.5"/>
        <omgdi:waypoint x="285.0" y="331.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="0.0" width="0.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="_9" id="BPMNEdge__9" sourceElement="_7" targetElement="_4">
        <omgdi:waypoint x="317.0" y="331.0"/>
        <omgdi:waypoint x="380.0" y="332.5"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="0.0" width="0.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="_10" id="BPMNEdge__10" sourceElement="_4" targetElement="_5">
        <omgdi:waypoint x="465.0" y="332.5"/>
        <omgdi:waypoint x="595.0" y="331.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="0.0" width="0.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNEdge>
    </bpmndi:BPMNPlane>
  </bpmndi:BPMNDiagram>
</definitions>

测试类

package com.yb.activiti6;

import org.activiti.engine.*;
import org.activiti.engine.repository.Deployment;
import org.activiti.engine.runtime.ProcessInstance;
import org.activiti.engine.task.Task;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

import java.io.IOException;
import java.util.List;

/**
 * @author [email protected]
 * @version 1.0
 * @date 2020/7/23
 */
@RunWith(SpringRunner.class)
@SpringBootTest
public class ActivitiDemoTest11 {
    
    
    @Autowired
    private RuntimeService runtimeService;

    @Autowired
    private TaskService taskService;

    @Autowired
    private IdentityService identityService;

    @Autowired
    private RepositoryService repositoryService;

    @Autowired
    private ProcessEngine processEngine;

    @Autowired
    private HistoryService historyService;


    /**
     * 发布流程,测试定时中间事件
     * @throws IOException
     */
    @Test
    public void deploymentProcesses_zip(){
    
    
        Deployment deploy = repositoryService.createDeployment()
                .name("测试-定时中间事件-1")//创建流程名称
                .addClasspathResource("processes/activiti_timing.bpmn")//指定zip完成部署
                .addClasspathResource("processes/activiti_timing.png")
                .deploy();
        System.out.println("部署id:"+deploy.getId());
        System.out.println("部署名称:"+deploy.getName());
    }
    /**
     * 启动流程，测试定时中间事件
     */
    @Test
    public void startProcess() throws InterruptedException{
    
    
        //可根据id,key,message启动流程
        ProcessInstance parallel = runtimeService.startProcessInstanceByKey("timing");
        System.out.println("流程实例id:"+parallel.getId());
        System.out.println("流程定义id:"+parallel.getProcessDefinitionId());

        System.out.println("========================================================");
        List<Task> list = taskService.createTaskQuery().taskAssignee("user1").list();
        for (Task task : list) {
    
    
            System.out.println("任务ID:" + task.getId());
            System.out.println("任务名称:" + task.getName());
            System.out.println("任务创建时间:" + task.getCreateTime());
            System.out.println("任务委派人:" + task.getAssignee());
            System.out.println("流程实例ID:" + task.getProcessInstanceId());
            //完成支付任务
            taskService.complete(task.getId());
        }
        //暂停70秒
        System.out.println("暂停70秒");
        Thread.sleep(1000 * 70);
        list = taskService.createTaskQuery().taskAssignee("user2").list();
        for (Task task : list) {
    
    
            System.out.println("任务ID:" + task.getId());
            System.out.println("任务名称:" + task.getName());
            System.out.println("任务创建时间:" + task.getCreateTime());
            System.out.println("任务委派人:" + task.getAssignee());
            System.out.println("流程实例ID:" + task.getProcessInstanceId());
            //完成发货任务
            taskService.complete(task.getId());
        }
    }
}

效果

1.4 信号中间事件

1.4.1 简介

信号中间事件分为Catching事件和Throwing事件。

1.4.2 触发信号事件

既可以通过bpmn节点由流程实例触发一个信号，也可以通过API触发。
手动触发信号:

// 把信号发送给全局所有订阅的处理器
RuntimeService.signalEventReceived(String signalName);
// 把信号发送给指定执行流
RuntimeService.signalEventReceived(String signalName, String executionId); 

1.4.3 查询信号事件的订阅

List<Execution> executions = runtimeService.createExecutionQuery()
      .signalEventSubscriptionName("alert")
      .list();  

1.4.4 信号事件范围

默认，信号会在流程引擎范围内进行广播。就是说， 你可以在一个流程实例中抛出一个信号事件，其他不同流程定义的流程实例 都可以监听到这个事件。然而，有时只希望在同一个流程实例中响应这个信号事件。 比如一个场景是，流程实例中的同步机制，如果两个或更多活动是互斥的。
如果想要限制信号事件的范围，可以使用信号事件定义的scope 属性 （不是BPMN2.0的标准属性）：

<signal id="alertSignal" name="alert" activiti:scope"processInstance"/>

1.4.5 信号中间Catching事件

1.4.5.1 简介

信号中间Catching事件会等待被触发，直到接收到相应的信号。

1.4.5.2 设计流程图

例如有如下场景，流程启动后或产生两条执行流，一条用户支付成功后发送信号，第二条等待接收信号后进入发货节点。

流程文件bpmn

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<definitions xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL" xmlns:activiti="http://activiti.org/bpmn" xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI" xmlns:omgdc="http://www.omg.org/spec/DD/20100524/DC" xmlns:omgdi="http://www.omg.org/spec/DD/20100524/DI" xmlns:tns="http://www.activiti.org/test" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" expressionLanguage="http://www.w3.org/1999/XPath" id="m1596011479461" name="" targetNamespace="http://www.activiti.org/test" typeLanguage="http://www.w3.org/2001/XMLSchema">
  <process id="myProcess_1" isClosed="false" isExecutable="true" processType="None">
    <startEvent id="_2" name="开始"/>
    <parallelGateway gatewayDirection="Unspecified" id="_3" name="ParallelGateway"/>
    <userTask activiti:assignee="user1" activiti:exclusive="true" id="_4" name="支付"/>
    <serviceTask activiti:exclusive="true" id="_5" name="生成订单"/>
    <parallelGateway gatewayDirection="Unspecified" id="_6" name="ParallelGateway"/>
    <endEvent id="_7" name="结束"/>
    <intermediateCatchEvent id="_8" name="IntermediateCatchingEvent">
      <signalEventDefinition id="_8_ED_1" signalRef="SIG_1"/>
    </intermediateCatchEvent>
    <userTask activiti:assignee="user2" activiti:exclusive="true" id="_9" name="发货"/>
    <sequenceFlow id="_10" sourceRef="_2" targetRef="_3"/>
    <sequenceFlow id="_11" sourceRef="_3" targetRef="_4"/>
    <sequenceFlow id="_12" sourceRef="_3" targetRef="_5"/>
    <sequenceFlow id="_13" sourceRef="_5" targetRef="_8"/>
    <sequenceFlow id="_14" sourceRef="_8" targetRef="_9"/>
    <sequenceFlow id="_15" sourceRef="_9" targetRef="_6"/>
    <sequenceFlow id="_16" sourceRef="_4" targetRef="_6"/>
    <sequenceFlow id="_17" sourceRef="_6" targetRef="_7"/>
  </process>
  <signal id="SIG_1" name="pay"/>
  <bpmndi:BPMNDiagram documentation="background=#000000;count=1;horizontalcount=1;orientation=0;width=842.4;height=1195.2;imageableWidth=832.4;imageableHeight=1185.2;imageableX=5.0;imageableY=5.0" id="Diagram-_1" name="New Diagram">
    <bpmndi:BPMNPlane bpmnElement="myProcess_1">
      <bpmndi:BPMNShape bpmnElement="_2" id="Shape-_2">
        <omgdc:Bounds height="32.0" width="32.0" x="0.0" y="240.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="32.0" width="32.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="_3" id="Shape-_3">
        <omgdc:Bounds height="32.0" width="32.0" x="130.0" y="240.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="32.0" width="32.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="_4" id="Shape-_4">
        <omgdc:Bounds height="55.0" width="85.0" x="205.0" y="100.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="55.0" width="85.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="_5" id="Shape-_5">
        <omgdc:Bounds height="55.0" width="85.0" x="210.0" y="365.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="55.0" width="85.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="_6" id="Shape-_6">
        <omgdc:Bounds height="32.0" width="32.0" x="640.0" y="240.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="32.0" width="32.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="_7" id="Shape-_7">
        <omgdc:Bounds height="32.0" width="32.0" x="760.0" y="240.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="32.0" width="32.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="_8" id="Shape-_8">
        <omgdc:Bounds height="32.0" width="32.0" x="390.0" y="375.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="32.0" width="32.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="_9" id="Shape-_9">
        <omgdc:Bounds height="55.0" width="85.0" x="505.0" y="365.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="55.0" width="85.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNEdge bpmnElement="_13" id="BPMNEdge__13" sourceElement="_5" targetElement="_8">
        <omgdi:waypoint x="295.0" y="392.5"/>
        <omgdi:waypoint x="390.0" y="391.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="0.0" width="0.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="_12" id="BPMNEdge__12" sourceElement="_3" targetElement="_5">
        <omgdi:waypoint x="162.0" y="256.0"/>
        <omgdi:waypoint x="210.0" y="392.5"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="0.0" width="0.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="_15" id="BPMNEdge__15" sourceElement="_9" targetElement="_6">
        <omgdi:waypoint x="590.0" y="392.5"/>
        <omgdi:waypoint x="640.0" y="256.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="0.0" width="0.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="_14" id="BPMNEdge__14" sourceElement="_8" targetElement="_9">
        <omgdi:waypoint x="422.0" y="391.0"/>
        <omgdi:waypoint x="505.0" y="392.5"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="0.0" width="0.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="_17" id="BPMNEdge__17" sourceElement="_6" targetElement="_7">
        <omgdi:waypoint x="672.0" y="256.0"/>
        <omgdi:waypoint x="760.0" y="256.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="0.0" width="0.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="_16" id="BPMNEdge__16" sourceElement="_4" targetElement="_6">
        <omgdi:waypoint x="290.0" y="127.5"/>
        <omgdi:waypoint x="640.0" y="256.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="0.0" width="0.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="_11" id="BPMNEdge__11" sourceElement="_3" targetElement="_4">
        <omgdi:waypoint x="162.0" y="256.0"/>
        <omgdi:waypoint x="205.0" y="127.5"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="0.0" width="0.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="_10" id="BPMNEdge__10" sourceElement="_2" targetElement="_3">
        <omgdi:waypoint x="32.0" y="256.0"/>
        <omgdi:waypoint x="130.0" y="256.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="0.0" width="0.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNEdge>
    </bpmndi:BPMNPlane>
  </bpmndi:BPMNDiagram>
</definitions>

测试类

package com.yb.activiti6;

import org.activiti.engine.*;
import org.activiti.engine.repository.Deployment;
import org.activiti.engine.runtime.Execution;
import org.activiti.engine.runtime.ProcessInstance;
import org.activiti.engine.task.Task;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

import java.io.IOException;
import java.util.List;

/**
 * @version 1.0
 * @date 2020/7/23
 */
@RunWith(SpringRunner.class)
@SpringBootTest
public class ActivitiDemoTest12 {
    
    
    @Autowired
    private RuntimeService runtimeService;

    @Autowired
    private TaskService taskService;

    @Autowired
    private IdentityService identityService;

    @Autowired
    private RepositoryService repositoryService;

    @Autowired
    private ProcessEngine processEngine;

    @Autowired
    private HistoryService historyService;


    /**
     * 发布流程,测试信号中间Catching事件
     * @throws IOException
     */
    @Test
    public void deploymentProcesses_zip(){
    
    
        Deployment deploy = repositoryService.createDeployment()
                .name("测试-信号中间Catching事件-1")//创建流程名称
                .addClasspathResource("processes/activiti_signalCenter.bpmn")//指定zip完成部署
                .addClasspathResource("processes/activiti_signalCenter.png")
                .deploy();
        System.out.println("部署id:"+deploy.getId());
        System.out.println("部署名称:"+deploy.getName());

    }

    /**
     * 启动流程，测试信号中间Catching事件
     */
    @Test
    public void startProcess() throws InterruptedException{
    
    
        //可根据id,key,message启动流程
        ProcessInstance parallel = runtimeService.startProcessInstanceByKey("myProcess_1");
        System.out.println("流程实例id:"+parallel.getId());
        System.out.println("流程定义id:"+parallel.getProcessDefinitionId());

        System.out.println("========================================================");
        List<Task> list = taskService.createTaskQuery().taskAssignee("user1").list();
        for (Task task : list) {
    
    
            System.out.println("任务ID:" + task.getId());
            System.out.println("任务名称:" + task.getName());
            System.out.println("任务创建时间:" + task.getCreateTime());
            System.out.println("任务委派人:" + task.getAssignee());
            System.out.println("流程实例ID:" + task.getProcessInstanceId());
            //完成支付任务
            System.out.println("task name:"+task.getName());
            taskService.complete(task.getId());

        }
        // 查询当前流程实例中订阅了“pay”信号的执行流
        List<Execution> executions = runtimeService.createExecutionQuery()
                .processInstanceId(parallel.getId())
                .signalEventSubscriptionName("pay")
                .list();
        for (Execution exe: executions) {
    
    
            System.out.println("执行流ID： " + exe);
            // 发送信号
            runtimeService.signalEventReceived("pay", exe.getId());
        }
        list = taskService.createTaskQuery().taskAssignee("user2").list();
        for (Task task : list) {
    
    
            System.out.println("任务ID:" + task.getId());
            System.out.println("任务名称:" + task.getName());
            System.out.println("任务创建时间:" + task.getCreateTime());
            System.out.println("任务委派人:" + task.getAssignee());
            System.out.println("流程实例ID:" + task.getProcessInstanceId());
            //完成发货任务
            System.out.println("task name:"+task.getName());
            taskService.complete(task.getId());
        }
    }
}

效果

1.4.6 信号中间Throwing事件

1.4.6.1 简介

信号中间Throwing事件用于抛出信号，当流程到达该事件时，会直接抛出信号，其他引用了相同信号的信号Catching事件会被触发。
设置activiti:async 代表同步异步执行， 可以控制捕获这个信号的信号中间Catching事件，将会在同一事务中完成，

1.4.6.2 设计流程图

例如有如下场景，流程启动后或产生两条执行流，一条用户支付成功后发送信号，第二条等待接收信号后进入发货节点。

流程文件bpmn

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<definitions xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL" xmlns:activiti="http://activiti.org/bpmn" xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI" xmlns:omgdc="http://www.omg.org/spec/DD/20100524/DC" xmlns:omgdi="http://www.omg.org/spec/DD/20100524/DI" xmlns:tns="http://www.activiti.org/test" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" expressionLanguage="http://www.w3.org/1999/XPath" id="m1596013137129" name="" targetNamespace="http://www.activiti.org/test" typeLanguage="http://www.w3.org/2001/XMLSchema">
  <process id="myProcess_1" isClosed="false" isExecutable="true" processType="None">
    <startEvent id="_2" name="开始"/>
    <parallelGateway gatewayDirection="Unspecified" id="_3" name="ParallelGateway"/>
    <userTask activiti:assignee="user1" activiti:exclusive="true" id="_4" name="支付"/>
    <serviceTask activiti:class="com.yb.activiti6.delegate.NewOrderDelegate" activiti:exclusive="true" id="_5" name="生成订单"/>
    <userTask activiti:assignee="user2" activiti:exclusive="true" id="_6" name="发货"/>
    <intermediateCatchEvent id="_7" name="IntermediateCatchingEvent">
      <signalEventDefinition id="_7_ED_1" signalRef="SIG_1"/>
    </intermediateCatchEvent>
    <intermediateThrowEvent id="_8" name="IntermediateThrowingEvent">
      <signalEventDefinition id="_8_ED_1" signalRef="SIG_1"/>
    </intermediateThrowEvent>
    <parallelGateway gatewayDirection="Unspecified" id="_9" name="ParallelGateway"/>
    <endEvent id="_10" name="结束"/>
    <sequenceFlow id="_11" sourceRef="_2" targetRef="_3"/>
    <sequenceFlow id="_12" sourceRef="_3" targetRef="_4"/>
    <sequenceFlow id="_13" sourceRef="_3" targetRef="_5"/>
    <sequenceFlow id="_14" sourceRef="_4" targetRef="_8"/>
    <sequenceFlow id="_15" sourceRef="_8" targetRef="_9"/>
    <sequenceFlow id="_16" sourceRef="_5" targetRef="_7"/>
    <sequenceFlow id="_17" sourceRef="_7" targetRef="_6"/>
    <sequenceFlow id="_18" sourceRef="_6" targetRef="_9"/>
    <sequenceFlow id="_19" sourceRef="_9" targetRef="_10"/>
  </process>
  <signal id="SIG_1" name="pay"/>
  <bpmndi:BPMNDiagram documentation="background=#000000;count=1;horizontalcount=1;orientation=0;width=842.4;height=1195.2;imageableWidth=832.4;imageableHeight=1185.2;imageableX=5.0;imageableY=5.0" id="Diagram-_1" name="New Diagram">
    <bpmndi:BPMNPlane bpmnElement="myProcess_1">
      <bpmndi:BPMNShape bpmnElement="_2" id="Shape-_2">
        <omgdc:Bounds height="32.0" width="32.0" x="-5.0" y="225.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="32.0" width="32.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="_3" id="Shape-_3">
        <omgdc:Bounds height="32.0" width="32.0" x="110.0" y="225.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="32.0" width="32.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="_4" id="Shape-_4">
        <omgdc:Bounds height="55.0" width="85.0" x="240.0" y="75.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="55.0" width="85.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="_5" id="Shape-_5">
        <omgdc:Bounds height="55.0" width="85.0" x="235.0" y="395.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="55.0" width="85.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="_6" id="Shape-_6">
        <omgdc:Bounds height="55.0" width="85.0" x="475.0" y="395.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="55.0" width="85.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="_7" id="Shape-_7">
        <omgdc:Bounds height="32.0" width="32.0" x="385.0" y="405.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="32.0" width="32.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="_8" id="Shape-_8">
        <omgdc:Bounds height="32.0" width="32.0" x="510.0" y="85.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="32.0" width="32.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="_9" id="Shape-_9">
        <omgdc:Bounds height="32.0" width="32.0" x="655.0" y="245.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="32.0" width="32.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="_10" id="Shape-_10">
        <omgdc:Bounds height="32.0" width="32.0" x="755.0" y="245.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="32.0" width="32.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNEdge bpmnElement="_13" id="BPMNEdge__13" sourceElement="_3" targetElement="_5">
        <omgdi:waypoint x="142.0" y="241.0"/>
        <omgdi:waypoint x="235.0" y="422.5"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="0.0" width="0.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="_12" id="BPMNEdge__12" sourceElement="_3" targetElement="_4">
        <omgdi:waypoint x="142.0" y="241.0"/>
        <omgdi:waypoint x="240.0" y="102.5"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="0.0" width="0.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="_15" id="BPMNEdge__15" sourceElement="_8" targetElement="_9">
        <omgdi:waypoint x="542.0" y="101.0"/>
        <omgdi:waypoint x="655.0" y="261.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="0.0" width="0.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="_14" id="BPMNEdge__14" sourceElement="_4" targetElement="_8">
        <omgdi:waypoint x="325.0" y="102.5"/>
        <omgdi:waypoint x="510.0" y="101.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="0.0" width="0.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="_17" id="BPMNEdge__17" sourceElement="_7" targetElement="_6">
        <omgdi:waypoint x="417.0" y="421.0"/>
        <omgdi:waypoint x="475.0" y="422.5"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="0.0" width="0.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="_16" id="BPMNEdge__16" sourceElement="_5" targetElement="_7">
        <omgdi:waypoint x="320.0" y="422.5"/>
        <omgdi:waypoint x="385.0" y="421.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="0.0" width="0.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="_19" id="BPMNEdge__19" sourceElement="_9" targetElement="_10">
        <omgdi:waypoint x="687.0" y="261.0"/>
        <omgdi:waypoint x="755.0" y="261.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="0.0" width="0.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="_18" id="BPMNEdge__18" sourceElement="_6" targetElement="_9">
        <omgdi:waypoint x="560.0" y="422.5"/>
        <omgdi:waypoint x="655.0" y="261.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="0.0" width="0.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="_11" id="BPMNEdge__11" sourceElement="_2" targetElement="_3">
        <omgdi:waypoint x="27.0" y="241.0"/>
        <omgdi:waypoint x="110.0" y="241.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="0.0" width="0.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNEdge>
    </bpmndi:BPMNPlane>
  </bpmndi:BPMNDiagram>
</definitions>

测试类

package com.yb.activiti6;

import org.activiti.engine.*;
import org.activiti.engine.repository.Deployment;
import org.activiti.engine.runtime.ProcessInstance;
import org.activiti.engine.task.Task;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

import java.io.IOException;
import java.util.List;

/**
 * @version 1.0
 * @date 2020/7/23
 */
@RunWith(SpringRunner.class)
@SpringBootTest
public class ActivitiDemoTest13 {
    
    
    @Autowired
    private RuntimeService runtimeService;

    @Autowired
    private TaskService taskService;

    @Autowired
    private IdentityService identityService;

    @Autowired
    private RepositoryService repositoryService;

    @Autowired
    private ProcessEngine processEngine;

    @Autowired
    private HistoryService historyService;


    /**
     * 发布流程,测试信号中间Throwing事件
     * @throws IOException
     */
    @Test
    public void deploymentProcesses_zip(){
    
    
        Deployment deploy = repositoryService.createDeployment()
                .name("测试-信号中间Throwing事件-1")//创建流程名称
                .addClasspathResource("processes/activiti_signalCenter2.bpmn")//指定zip完成部署
                .addClasspathResource("processes/activiti_signalCenter2.png")
                .deploy();
        System.out.println("部署id:"+deploy.getId());
        System.out.println("部署名称:"+deploy.getName());

    }

    /**
     * 启动流程，测试信号中间Throwing事件
     */
    @Test
    public void startProcess() throws InterruptedException{
    
    
        //可根据id,key,message启动流程
        ProcessInstance parallel = runtimeService.startProcessInstanceByKey("myProcess_2");
        System.out.println("流程实例id:"+parallel.getId());
        System.out.println("流程定义id:"+parallel.getProcessDefinitionId());

        System.out.println("========================================================");
        List<Task> list = taskService.createTaskQuery().taskAssignee("user1").list();
        for (Task task : list) {
    
    
            System.out.println("任务ID:" + task.getId());
            System.out.println("任务名称:" + task.getName());
            System.out.println("任务创建时间:" + task.getCreateTime());
            System.out.println("任务委派人:" + task.getAssignee());
            System.out.println("流程实例ID:" + task.getProcessInstanceId());
            //完成支付任务
            System.out.println("task name:"+task.getName());
            taskService.complete(task.getId());

        }
        //暂停3秒
        System.out.println("暂停3秒");
        Thread.sleep(1000 * 3);
        list = taskService.createTaskQuery().taskAssignee("user2").list();
        for (Task task : list) {
    
    
            System.out.println("任务ID:" + task.getId());
            System.out.println("任务名称:" + task.getName());
            System.out.println("任务创建时间:" + task.getCreateTime());
            System.out.println("任务委派人:" + task.getAssignee());
            System.out.println("流程实例ID:" + task.getProcessInstanceId());
            //完成发货任务
           System.out.println("task name:"+task.getName());
            taskService.complete(task.getId());
        }
    }
}

效果

1.5 消息中间事件

1.5.1 消息事件的定义

消息事件是一种引用了消息定义的事件，与信号时间不同的是，消息只能只想一个接收人，不能像信号事件一样广播。
分为消息开始事件和中间消息事件。

1.5.2 触发消息事件

消息开始事件

ProcessInstance startProcessInstanceByMessage(String messageName);
ProcessInstance startProcessInstanceByMessage(String messageName, Map<String, Object> processVariables);
ProcessInstance startProcessInstanceByMessage(String messageName, String businessKey, Map<String, Object> processVariables); 

消息中间事件

void messageEventReceived(String messageName, String executionId);
void messageEventReceived(String messageName, String executionId, HashMap<String, Object> processVariables);    

1.5.3 查询消息事件的订阅

消息开始事件

ProcessDefinition processDefinition = repositoryService.createProcessDefinitionQuery()
      .messageEventSubscription("msgStart")
      .singleResult();

消息中间事件

Execution execution = runtimeService.createExecutionQuery()
      .messageEventSubscriptionName("msg")
      .processInstanceId(pi.getId())
      .singleResult();

1.5.4 消息中间事件的定义

消息中间事件作为流程一个节点使用

1.5.5 设计流程图

场景：用户支付成功后等待一分钟，商家发货

流程文件bpmn

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<definitions xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL" xmlns:activiti="http://activiti.org/bpmn" xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI" xmlns:omgdc="http://www.omg.org/spec/DD/20100524/DC" xmlns:omgdi="http://www.omg.org/spec/DD/20100524/DI" xmlns:tns="http://www.activiti.org/test" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" expressionLanguage="http://www.w3.org/1999/XPath" id="m1596014623730" name="" targetNamespace="http://www.activiti.org/test" typeLanguage="http://www.w3.org/2001/XMLSchema">
  <message id="MSG_1" name="msg"/>
  <process id="myProcess_1" isClosed="false" isExecutable="true" processType="None">
    <startEvent id="_2" name="开始"/>
    <intermediateCatchEvent id="_3" name="IntermediateCatchingEvent">
      <messageEventDefinition id="_3_ED_1" messageRef="MSG_1"/>
    </intermediateCatchEvent>
    <userTask activiti:exclusive="true" id="_4" name="用户任务"/>
    <endEvent id="_5" name="结束"/>
    <sequenceFlow id="_6" sourceRef="_2" targetRef="_3"/>
    <sequenceFlow id="_7" sourceRef="_3" targetRef="_4"/>
    <sequenceFlow id="_8" sourceRef="_4" targetRef="_5"/>
  </process>
  <bpmndi:BPMNDiagram documentation="background=#000000;count=1;horizontalcount=1;orientation=0;width=842.4;height=1195.2;imageableWidth=832.4;imageableHeight=1185.2;imageableX=5.0;imageableY=5.0" id="Diagram-_1" name="New Diagram">
    <bpmndi:BPMNPlane bpmnElement="myProcess_1">
      <bpmndi:BPMNShape bpmnElement="_2" id="Shape-_2">
        <omgdc:Bounds height="32.0" width="32.0" x="-10.0" y="205.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="32.0" width="32.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="_3" id="Shape-_3">
        <omgdc:Bounds height="32.0" width="32.0" x="205.0" y="205.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="32.0" width="32.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="_4" id="Shape-_4">
        <omgdc:Bounds height="55.0" width="85.0" x="415.0" y="195.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="55.0" width="85.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="_5" id="Shape-_5">
        <omgdc:Bounds height="32.0" width="32.0" x="655.0" y="205.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="32.0" width="32.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNEdge bpmnElement="_6" id="BPMNEdge__6" sourceElement="_2" targetElement="_3">
        <omgdi:waypoint x="22.0" y="221.0"/>
        <omgdi:waypoint x="205.0" y="221.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="0.0" width="0.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="_7" id="BPMNEdge__7" sourceElement="_3" targetElement="_4">
        <omgdi:waypoint x="237.0" y="221.0"/>
        <omgdi:waypoint x="415.0" y="222.5"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="0.0" width="0.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="_8" id="BPMNEdge__8" sourceElement="_4" targetElement="_5">
        <omgdi:waypoint x="500.0" y="222.5"/>
        <omgdi:waypoint x="655.0" y="221.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="0.0" width="0.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNEdge>
    </bpmndi:BPMNPlane>
  </bpmndi:BPMNDiagram>
</definitions>

测试类

package com.yb.activiti6;

import org.activiti.engine.*;
import org.activiti.engine.repository.Deployment;
import org.activiti.engine.runtime.Execution;
import org.activiti.engine.runtime.ProcessInstance;
import org.activiti.engine.task.Task;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

import java.io.IOException;
import java.util.List;

/**
 * @author [email protected]
 * @version 1.0
 * @date 2020/7/23
 */
@RunWith(SpringRunner.class)
@SpringBootTest
public class ActivitiDemoTest14 {
    
    
    @Autowired
    private RuntimeService runtimeService;

    @Autowired
    private TaskService taskService;

    @Autowired
    private IdentityService identityService;

    @Autowired
    private RepositoryService repositoryService;

    @Autowired
    private ProcessEngine processEngine;

    @Autowired
    private HistoryService historyService;


    /**
     * 发布流程,测试消息中间事件
     * @throws IOException
     */
    @Test
    public void deploymentProcesses_zip(){
    
    
        Deployment deploy = repositoryService.createDeployment()
                .name("测试-消息中间事件-1")//创建流程名称
                .addClasspathResource("processes/activiti_message.bpmn")//指定zip完成部署
                .addClasspathResource("processes/activiti_message.png")
                .deploy();
        System.out.println("部署id:"+deploy.getId());
        System.out.println("部署名称:"+deploy.getName());

    }

    /**
     * 启动流程，测试消息中间事件
     */
    @Test
    public void startProcess() throws InterruptedException{
    
    
        //可根据id,key,message启动流程
        ProcessInstance parallel = runtimeService.startProcessInstanceByKey("myProcess_1");
        System.out.println("流程实例id:"+parallel.getId());
        System.out.println("流程定义id:"+parallel.getProcessDefinitionId());

        System.out.println("========================================================");
        Execution msg = runtimeService.createExecutionQuery()
                .messageEventSubscriptionName("msg")
                .processInstanceId(parallel.getId())
                .singleResult();
        System.out.println("Execution: " + msg);
        runtimeService.messageEventReceived("msg",msg.getId());
        //暂停3秒
        System.out.println("暂停3秒");
        Thread.sleep(1000 * 3);
        List<Task> list = taskService.createTaskQuery().taskAssignee("msgUser").list();
        for (Task task : list) {
    
    
            System.out.println("任务ID:" + task.getId());
            System.out.println("任务名称:" + task.getName());
            System.out.println("任务创建时间:" + task.getCreateTime());
            System.out.println("任务委派人:" + task.getAssignee());
            System.out.println("流程实例ID:" + task.getProcessInstanceId());
            //完成发货任务
            System.out.println("task name:"+task.getName());
            taskService.complete(task.getId());
        }
    }
}

效果
向消息中间事件发送信息，触发消息中间事件，流程向下走到用户任务，完成任务，流程结束。

到此，定时器中间事件，信号中间事件，消息中间事件，测试完毕。