activiti学习之多实例任务

女爷i 2022-09-15 12:58 455阅读 0赞

## 写在前面 ##

在实际的业务场景中可能一个节点同时需要多个人来办理，比如开会签到的场景，或者是投票的场景，此时就需要使用到多实例任务，下面我们一起来看下。

## 1：测试 ##

### 1.1：设计流程 ###

*  效果图

![在这里插入图片描述][26cc28bbf3814c6f928e787284d9a849.png]

多实例节点"多实例任务节点"设置如下图：

![在这里插入图片描述][1f7a9495a85341c09fa2f61eb500c78f.png]

![在这里插入图片描述][watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAd2FuZzA5MDc_size_20_color_FFFFFF_t_70_g_se_x_16]

*  xml

<?xml version="1.0" encoding="UTF-8"?>
    <definitions xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" 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" typeLanguage="http://www.w3.org/2001/XMLSchema" expressionLanguage="http://www.w3.org/1999/XPath" targetNamespace="http://www.activiti.org/test">
      <process id="csdnMultiInstance" name="csdnMultiInstance" isExecutable="true">
        <startEvent id="startevent1" name="Start"></startEvent>
        <userTask id="usertask1" name="正常任务节点" activiti:assignee="张三">
          <extensionElements>
            <modeler:initiator-can-complete xmlns:modeler="http://activiti.com/modeler">false</modeler:initiator-can-complete>
          </extensionElements>
        </userTask>
        <userTask id="usertask2" name="多实例任务节点" activiti:assignee="${user}">
          <extensionElements>
            <modeler:initiator-can-complete xmlns:modeler="http://activiti.com/modeler">false</modeler:initiator-can-complete>
          </extensionElements>
          <multiInstanceLoopCharacteristics isSequential="false" activiti:collection="users" activiti:elementVariable="user">
            <completionCondition>${nrOfCompletedInstances/nrOfInstances >= 0.5}</completionCondition>
          </multiInstanceLoopCharacteristics>
        </userTask>
        <sequenceFlow id="flow1" sourceRef="startevent1" targetRef="usertask1"></sequenceFlow>
        <sequenceFlow id="flow2" sourceRef="usertask1" targetRef="usertask2"></sequenceFlow>
        <endEvent id="endevent1" name="End"></endEvent>
        <sequenceFlow id="flow3" sourceRef="usertask2" targetRef="endevent1"></sequenceFlow>
      </process>
      <bpmndi:BPMNDiagram id="BPMNDiagram_csdnMultiInstance">
        <bpmndi:BPMNPlane bpmnElement="csdnMultiInstance" id="BPMNPlane_csdnMultiInstance">
          <bpmndi:BPMNShape bpmnElement="startevent1" id="BPMNShape_startevent1">
            <omgdc:Bounds height="35.0" width="35.0" x="110.0" y="270.0"></omgdc:Bounds>
          </bpmndi:BPMNShape>
          <bpmndi:BPMNShape bpmnElement="usertask1" id="BPMNShape_usertask1">
            <omgdc:Bounds height="55.0" width="105.0" x="320.0" y="260.0"></omgdc:Bounds>
          </bpmndi:BPMNShape>
          <bpmndi:BPMNShape bpmnElement="usertask2" id="BPMNShape_usertask2">
            <omgdc:Bounds height="55.0" width="105.0" x="610.0" y="260.0"></omgdc:Bounds>
          </bpmndi:BPMNShape>
          <bpmndi:BPMNShape bpmnElement="endevent1" id="BPMNShape_endevent1">
            <omgdc:Bounds height="35.0" width="35.0" x="870.0" y="270.0"></omgdc:Bounds>
          </bpmndi:BPMNShape>
          <bpmndi:BPMNEdge bpmnElement="flow1" id="BPMNEdge_flow1">
            <omgdi:waypoint x="145.0" y="287.0"></omgdi:waypoint>
            <omgdi:waypoint x="320.0" y="287.0"></omgdi:waypoint>
          </bpmndi:BPMNEdge>
          <bpmndi:BPMNEdge bpmnElement="flow2" id="BPMNEdge_flow2">
            <omgdi:waypoint x="425.0" y="287.0"></omgdi:waypoint>
            <omgdi:waypoint x="610.0" y="287.0"></omgdi:waypoint>
          </bpmndi:BPMNEdge>
          <bpmndi:BPMNEdge bpmnElement="flow3" id="BPMNEdge_flow3">
            <omgdi:waypoint x="715.0" y="287.0"></omgdi:waypoint>
            <omgdi:waypoint x="870.0" y="287.0"></omgdi:waypoint>
          </bpmndi:BPMNEdge>
        </bpmndi:BPMNPlane>
      </bpmndi:BPMNDiagram>
    </definitions>

### 1.2：部署流程 ###

/** * 部署流程定义 */
    @Test
    public void deploy() { 
        Deployment deployment = repositoryService.createDeployment() // 创建部署
                .addClasspathResource("com/jh/activiti/csdnMultiInstance.bpmn20.xml") // 加载流程资源文件
                .name("csdn多实例测试") // 流程名称
                .deploy(); // 部署
        System.out.println("流程部署ID:" + deployment.getId());
        System.out.println("流程部署Name:" + deployment.getName());
    }

![在这里插入图片描述][cf1286b5e6704a2cb756ecf8225550b1.png]

![在这里插入图片描述][e908f69dd3294f93926f42fac12a7cce.png]

### 1.3：创建流程定义 ###

@Test
    public void startInstance() { 
        runtimeService.startProcessInstanceByKey("csdnMultiInstance");
    }

![在这里插入图片描述][a9b3021bc7944cc18a8fd5bea058ad2f.png]

生成的任务：

![在这里插入图片描述][4ea3f366eb8e4b3492313c78777a4b83.png]

### 1.4：完成任务 ###

完成任务并指定多实例任务"多实例任务节点"的办理人：

@Test
    public void complete() { 
        Map<String, Object> variables = new HashMap<String, Object>();
        variables.put("users", Arrays.asList("test1,test2,test3,test4".split(",")));
        taskService.complete("855007", variables);
    }

针对"test1,test2,test3,test4"生成了4个任务，如下图：

![在这里插入图片描述][watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAd2FuZzA5MDc_size_20_color_FFFFFF_t_70_g_se_x_16 1]

因为我们设置了`${nrOfCompletedInstances/nrOfInstances >= 0.5}`所以有2个人完成任务，该节点就会结束，直接使用`taskService.complete(taskId)`来测试：

首先执行`taskService.complete("857520");`完成一个任务，变为如下图：

![在这里插入图片描述][watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAd2FuZzA5MDc_size_20_color_FFFFFF_t_70_g_se_x_16 2]

首先执行`taskService.complete("857525");`完成一个任务，可以看到剩余的2个任务就自动结束了，变为如下图：

![在这里插入图片描述][watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAd2FuZzA5MDc_size_20_color_FFFFFF_t_70_g_se_x_16 3]

[26cc28bbf3814c6f928e787284d9a849.png]: /images/20220828/6e360d5c8d054232b2f481d4a0817627.png
[1f7a9495a85341c09fa2f61eb500c78f.png]: /images/20220828/739d57ca22294dad81969e7c9ccfcdaa.png
[watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAd2FuZzA5MDc_size_20_color_FFFFFF_t_70_g_se_x_16]: /images/20220828/f63c30eb91684d4da8b9951c163aeb2a.png
[cf1286b5e6704a2cb756ecf8225550b1.png]: /images/20220828/8764572922d54fe7b376cfeea177f5f6.png
[e908f69dd3294f93926f42fac12a7cce.png]: /images/20220828/3953c69b0f8b4754b86a69a76d899467.png
[a9b3021bc7944cc18a8fd5bea058ad2f.png]: /images/20220828/bba2965a118e4117995c60344b293433.png
[4ea3f366eb8e4b3492313c78777a4b83.png]: /images/20220828/01e760f81b1e4f7aa8a35cc29adcb211.png
[watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAd2FuZzA5MDc_size_20_color_FFFFFF_t_70_g_se_x_16 1]: /images/20220828/fb35e84c77f74fb59e4c911d5a44ab9e.png
[watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAd2FuZzA5MDc_size_20_color_FFFFFF_t_70_g_se_x_16 2]: /images/20220828/bd492fd816e94bfba170d73695fd15b5.png
[watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAd2FuZzA5MDc_size_20_color_FFFFFF_t_70_g_se_x_16 3]: /images/20220828/cf2b1c4bb6094c9aa43bb05dafae4940.png