Camunda工作流网关（二）-Parallel Gateway（并行网关）

hardworkl

已于 2023-11-20 10:30:20 修改

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分类专栏： Camunda工作流文章标签： java

于 2023-08-02 17:06:11 首次发布

本文链接：https://blog.youkuaiyun.com/mimanghen/article/details/132019481

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1、Parallel Gateway（并行网关）

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A parallel gateway (or AND-gateway) allows you to split the flow into concurrent paths.
并行网关（或AND网关）允许您将流拆分为并发路径。

When a parallel gateway with multiple outgoing sequence flows is entered, all flows are taken. The paths are executed concurrently and independently.
当输入具有多个传出序列流的并行网关时，将获取所有流。这些路径是同时独立执行的。

The concurrent paths can be joined using a parallel gateway with multiple incoming sequence flows. The process instance waits at the parallel gateway until each incoming sequence is taken.
可以使用具有多个传入序列流的并行网关来连接并发路径。进程实例在并行网关处等待，直到获取每个传入序列为止。

并行网关的重要特性

（1）一个流程中流程实例只有1个，执行对象有多个；

（2）并行网关的功能是基于进入和外出的顺序流的：

 分支(fork)：并行后的所有外出顺序流，为每个顺序流都创建一个并发分支。
 汇聚(join)：所有到达并行网关，在此等待的进入分支，直到所有进入顺序流的分支都到达以后，流程就会通过汇聚网关。

（3）并行网关的进入和外出都是用相同的节点标识；

（4）并行网关不会解析条件，即使顺序流中定义了条件，也会被忽略，所以不用在连线上添加流程变量判断流程流向。

重点：
并行网关至少有一条分支被执行，而且所有的分支都会被执行。
并行网关不会解析条件。即使顺序流中定义了条件，也会被忽略。

2、业务场景

公司里有个用章的流程，先是部门主任审批，然后下一步就需要项目经理审批，后勤行政主管审批，综合办审批，这三个节点不需要判断，都需要执行。

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并行网关和其他网关不一样，右侧不能设置Condition条件，也就是说并行网关不需要条件，所有的节点都需要触发。

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部门主任审批完成后，流程图显示三个节点需要处理，如下图：
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部门主任审批完成后，act_ru_task任务表生成三条记录
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act_hi_taskinst 历史任务表生成三条记录

3、BPMN流程模型文件

<?xml version="1.0" encoding="UTF-8"?>
<bpmn:definitions xmlns:bpmn="http://www.omg.org/spec/BPMN/20100524/MODEL" xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI" xmlns:dc="http://www.omg.org/spec/DD/20100524/DC" xmlns:camunda="http://camunda.org/schema/1.0/bpmn" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:di="http://www.omg.org/spec/DD/20100524/DI" xmlns:modeler="http://camunda.org/schema/modeler/1.0" id="Definitions_14x7iqb" targetNamespace="http://bpmn.io/schema/bpmn" exporter="Camunda Modeler" exporterVersion="5.12.1" modeler:executionPlatform="Camunda Platform" modeler:executionPlatformVersion="7.19.0">
  <bpmn:process id="flow_xmgs_tylc03" name="通用流程03" isExecutable="true" camunda:historyTimeToLive="100">
    <bpmn:userTask id="Activity_1jfshj8" name="综合办审批" camunda:assignee="${bmzrapprover}">
      <bpmn:incoming>Flow_0n13tl5</bpmn:incoming>
      <bpmn:outgoing>Flow_1hom98o</bpmn:outgoing>
      <bpmn:multiInstanceLoopCharacteristics camunda:collection="zhbList" camunda:elementVariable="bmzrapprover">
        <bpmn:completionCondition xsi:type="bpmn:tFormalExpression">${nrOfCompletedInstances ==1}</bpmn:completionCondition>
      </bpmn:multiInstanceLoopCharacteristics>
    </bpmn:userTask>
    <bpmn:userTask id="Activity_1eadekv" name="后勤行政主管" camunda:assignee="${hqxzzgapprover}">
      <bpmn:incoming>Flow_1w2mccm</bpmn:incoming>
      <bpmn:outgoing>Flow_0vhd0x0</bpmn:outgoing>
      <bpmn:multiInstanceLoopCharacteristics camunda:collection="hqxzzgList" camunda:elementVariable="hqxzzgapprover" />
    </bpmn:userTask>
    <bpmn:userTask id="Activity_0dp5aff" name="项目经理审批" camunda:assignee="${xmjlapprover}">
      <bpmn:incoming>Flow_1mu2q0o</bpmn:incoming>
      <bpmn:outgoing>Flow_1idtuv5</bpmn:outgoing>
    </bpmn:userTask>
    <bpmn:userTask id="Activity_0yme7cw" name="业务审批" camunda:assignee="${hrapprover}">
      <bpmn:incoming>Flow_19k7a5z</bpmn:incoming>
      <bpmn:outgoing>Flow_1ttjdm2</bpmn:outgoing>
    </bpmn:userTask>
    <bpmn:sequenceFlow id="Flow_1idtuv5" sourceRef="Activity_0dp5aff" targetRef="Gateway_1bwkty8" />
    <bpmn:sequenceFlow id="Flow_1hom98o" sourceRef="Activity_1jfshj8" targetRef="Gateway_1bwkty8" />
    <bpmn:sequenceFlow id="Flow_0vhd0x0" sourceRef="Activity_1eadekv" targetRef="Gateway_1bwkty8" />
    <bpmn:sequenceFlow id="Flow_19k7a5z" sourceRef="Gateway_1bwkty8" targetRef="Activity_0yme7cw" />
    <bpmn:sequenceFlow id="Flow_1mu2q0o" sourceRef="Gateway_0qq9km9" targetRef="Activity_0dp5aff" />
    <bpmn:sequenceFlow id="Flow_0n13tl5" sourceRef="Gateway_0qq9km9" targetRef="Activity_1jfshj8" />
    <bpmn:sequenceFlow id="Flow_1w2mccm" sourceRef="Gateway_0qq9km9" targetRef="Activity_1eadekv" />
    <bpmn:sequenceFlow id="Flow_119uv3d" sourceRef="Activity_0av5lza" targetRef="Gateway_0qq9km9" />
    <bpmn:parallelGateway id="Gateway_0qq9km9" name="并行网关">
      <bpmn:incoming>Flow_119uv3d</bpmn:incoming>
      <bpmn:outgoing>Flow_1mu2q0o</bpmn:outgoing>
      <bpmn:outgoing>Flow_0n13tl5</bpmn:outgoing>
      <bpmn:outgoing>Flow_1w2mccm</bpmn:outgoing>
    </bpmn:parallelGateway>
    <bpmn:endEvent id="Event_1bhd1o0" name="结束">
      <bpmn:incoming>Flow_1ttjdm2</bpmn:incoming>
    </bpmn:endEvent>
    <bpmn:sequenceFlow id="Flow_1ttjdm2" sourceRef="Activity_0yme7cw" targetRef="Event_1bhd1o0" />
    <bpmn:parallelGateway id="Gateway_1bwkty8">
      <bpmn:incoming>Flow_1idtuv5</bpmn:incoming>
      <bpmn:incoming>Flow_1hom98o</bpmn:incoming>
      <bpmn:incoming>Flow_0vhd0x0</bpmn:incoming>
      <bpmn:outgoing>Flow_19k7a5z</bpmn:outgoing>
    </bpmn:parallelGateway>
    <bpmn:startEvent id="Event_1bb4pen">
      <bpmn:outgoing>Flow_03959vw</bpmn:outgoing>
    </bpmn:startEvent>
    <bpmn:sequenceFlow id="Flow_03959vw" sourceRef="Event_1bb4pen" targetRef="Activity_0av5lza" />
    <bpmn:userTask id="Activity_0av5lza" name="部门主任审批">
      <bpmn:incoming>Flow_03959vw</bpmn:incoming>
      <bpmn:outgoing>Flow_119uv3d</bpmn:outgoing>
    </bpmn:userTask>
  </bpmn:process>
  <bpmndi:BPMNDiagram id="BPMNDiagram_1">
    <bpmndi:BPMNPlane id="BPMNPlane_1" bpmnElement="flow_xmgs_tylc03">
      <bpmndi:BPMNShape id="BPMNShape_05ou9jz" bpmnElement="Activity_1jfshj8">
        <dc:Bounds x="560" y="360" width="100" height="80" />
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape id="BPMNShape_1hk6vkq" bpmnElement="Activity_1eadekv">
        <dc:Bounds x="560" y="220" width="100" height="80" />
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape id="BPMNShape_1lurxsj" bpmnElement="Activity_0dp5aff">
        <dc:Bounds x="560" y="80" width="100" height="80" />
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape id="BPMNShape_1ptb9ma" bpmnElement="Activity_0yme7cw">
        <dc:Bounds x="840" y="220" width="100" height="80" />
        <bpmndi:BPMNLabel />
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape id="Gateway_03cntg7_di" bpmnElement="Gateway_0qq9km9">
        <dc:Bounds x="445" y="235" width="50" height="50" />
        <bpmndi:BPMNLabel>
          <dc:Bounds x="448" y="213" width="44" height="14" />
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape id="Event_1bhd1o0_di" bpmnElement="Event_1bhd1o0">
        <dc:Bounds x="1012" y="242" width="36" height="36" />
        <bpmndi:BPMNLabel>
          <dc:Bounds x="1019" y="285" width="22" height="14" />
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape id="Gateway_0rf8ahu_di" bpmnElement="Gateway_1bwkty8">
        <dc:Bounds x="725" y="235" width="50" height="50" />
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape id="Event_1bb4pen_di" bpmnElement="Event_1bb4pen">
        <dc:Bounds x="152" y="242" width="36" height="36" />
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape id="Activity_0bbu7rf_di" bpmnElement="Activity_0av5lza">
        <dc:Bounds x="260" y="220" width="100" height="80" />
        <bpmndi:BPMNLabel />
      </bpmndi:BPMNShape>
      <bpmndi:BPMNEdge id="BPMNEdge_0f9qh5w" bpmnElement="Flow_1idtuv5">
        <di:waypoint x="660" y="120" />
        <di:waypoint x="750" y="120" />
        <di:waypoint x="750" y="235" />
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge id="BPMNEdge_0h10sev" bpmnElement="Flow_1hom98o">
        <di:waypoint x="660" y="400" />
        <di:waypoint x="750" y="400" />
        <di:waypoint x="750" y="285" />
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge id="BPMNEdge_0lyykuf" bpmnElement="Flow_0vhd0x0">
        <di:waypoint x="660" y="260" />
        <di:waypoint x="725" y="260" />
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge id="BPMNEdge_126jysm" bpmnElement="Flow_19k7a5z">
        <di:waypoint x="775" y="260" />
        <di:waypoint x="840" y="260" />
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge id="BPMNEdge_14pbmj0" bpmnElement="Flow_1mu2q0o">
        <di:waypoint x="470" y="235" />
        <di:waypoint x="470" y="120" />
        <di:waypoint x="560" y="120" />
        <bpmndi:BPMNLabel>
          <dc:Bounds x="1005" y="175" width="23" height="14" />
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge id="BPMNEdge_0c8q6v9" bpmnElement="Flow_0n13tl5">
        <di:waypoint x="470" y="285" />
        <di:waypoint x="470" y="400" />
        <di:waypoint x="560" y="400" />
        <bpmndi:BPMNLabel>
          <dc:Bounds x="1005" y="340" width="23" height="14" />
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge id="BPMNEdge_1qq53dk" bpmnElement="Flow_1w2mccm">
        <di:waypoint x="495" y="260" />
        <di:waypoint x="560" y="260" />
        <bpmndi:BPMNLabel>
          <dc:Bounds x="1049" y="243" width="23" height="14" />
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge id="Flow_119uv3d_di" bpmnElement="Flow_119uv3d">
        <di:waypoint x="360" y="260" />
        <di:waypoint x="445" y="260" />
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge id="Flow_1ttjdm2_di" bpmnElement="Flow_1ttjdm2">
        <di:waypoint x="940" y="260" />
        <di:waypoint x="1012" y="260" />
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge id="Flow_03959vw_di" bpmnElement="Flow_03959vw">
        <di:waypoint x="188" y="260" />
        <di:waypoint x="260" y="260" />
      </bpmndi:BPMNEdge>
    </bpmndi:BPMNPlane>
  </bpmndi:BPMNDiagram>
</bpmn:definitions>