BoundaryEvent元件

BoundaryEvent總述

BoundaryEvent分為六種，第一種為時間Boundary事件，第二種為錯誤Boundary事件，第三種訊息Boundary事件，第四種為取消Boundary事件，第五種為補償Boundary事件，第六種為訊號Boundary事件。邊界事件依附於事件存在。

MessageBoundaryEvent

流程圖總覽

注意部分

ServiceTask

ServiceTask

public class ServiceTask implements JavaDelegate {
    @Override
 

    public void execute(DelegateExecution execution) {
        System.out.println("ServiceTask");
    }
}

@Test
public void MessageBoundary() throws InterruptedException{
    Deployment deployment = repositoryService.createDeployment()
                    .name("MessageBoundary")
                    .addClasspathResource
 
("bpmn/MessageBoundary.bpmn")
                    .addClasspathResource("bpmn/MessageBoundary.png")
                    .deploy();
    System.out.println("部署ID："+deployment.getId());
    System.out.println("部署名稱："+deployment.getName());

    ProcessInstance pi = runtimeService.startProcessInstanceByKey
 
("MessageBoundary");
    Execution ex = runtimeService.createExecutionQuery().processDefinitionId(pi.getProcessDefinitionId()).activityId("boundarymessage1").singleResult();
    runtimeService.messageEventReceived("msgName", ex.getId());
    Thread.sleep(1000 *10);
}

SignalBoundaryEvent

如果有兩個活動訊號邊界事件捕獲相同的訊號事件，則兩個邊界事件都會被觸發，即使它們是不同流程例項的一部分。

流程圖總覽

流程配置

ServiceTask

XML程式碼

<?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">
  <signal id="Signal" name="SignalPTM"></signal>
  <process id="SignalBoundary" name="My process" isExecutable="true">
    <startEvent id="startevent1" name="Start"></startEvent>
    <userTask id="usertask1" name="User Task"></userTask>
    <sequenceFlow id="flow1" sourceRef="startevent1" targetRef="usertask1"></sequenceFlow>
    <boundaryEvent id="boundarysignal1" name="Signal" attachedToRef="usertask1" cancelActivity="true">
      <signalEventDefinition signalRef="Signal"></signalEventDefinition>
    </boundaryEvent>
    <serviceTask id="servicetask1" name="Service Task" activiti:class="com.ptm.prdemo.servicetask.ServiceTask"></serviceTask>
    <sequenceFlow id="flow3" sourceRef="boundarysignal1" targetRef="servicetask1"></sequenceFlow>
    <endEvent id="endevent1" name="End"></endEvent>
    <sequenceFlow id="flow4" sourceRef="usertask1" targetRef="endevent1"></sequenceFlow>
  </process>
  <bpmndi:BPMNDiagram id="BPMNDiagram_SignalBoundary">
    <bpmndi:BPMNPlane bpmnElement="SignalBoundary" id="BPMNPlane_SignalBoundary">
      <bpmndi:BPMNShape bpmnElement="startevent1" id="BPMNShape_startevent1">
        <omgdc:Bounds height="35.0" width="35.0" x="130.0" y="160.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="usertask1" id="BPMNShape_usertask1">
        <omgdc:Bounds height="55.0" width="105.0" x="240.0" y="150.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="boundarysignal1" id="BPMNShape_boundarysignal1">
        <omgdc:Bounds height="30.0" width="30.0" x="280.0" y="190.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="servicetask1" id="BPMNShape_servicetask1">
        <omgdc:Bounds height="55.0" width="105.0" x="366.0" y="260.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="endevent1" id="BPMNShape_endevent1">
        <omgdc:Bounds height="35.0" width="35.0" x="500.0" y="160.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNEdge bpmnElement="flow1" id="BPMNEdge_flow1">
        <omgdi:waypoint x="165.0" y="177.0"></omgdi:waypoint>
        <omgdi:waypoint x="240.0" y="177.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow3" id="BPMNEdge_flow3">
        <omgdi:waypoint x="295.0" y="220.0"></omgdi:waypoint>
        <omgdi:waypoint x="418.0" y="260.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow4" id="BPMNEdge_flow4">
        <omgdi:waypoint x="345.0" y="177.0"></omgdi:waypoint>
        <omgdi:waypoint x="500.0" y="177.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
    </bpmndi:BPMNPlane>
  </bpmndi:BPMNDiagram>
</definitions>

測試程式碼

@Test
public void SignalBoundary() throws InterruptedException{
    Deployment deployment = repositoryService.createDeployment()
                    .name("SignalBoundary")
                    .addClasspathResource("bpmn/SignalBoundary.bpmn")
                    .addClasspathResource("bpmn/SignalBoundary.png")
                    .deploy();
    System.out.println("部署ID："+deployment.getId());
    System.out.println("部署名稱："+deployment.getName());
    ProcessInstance pi = runtimeService.startProcessInstanceByKey("SignalBoundary");
    runtimeService.signalEventReceived("SignalPTM");
    Thread.sleep(1000 *10);
}

事先部署三個流程之後執行signalEventReceived【三個流程全部執行了訊號邊界事件，訊號事件是跨流程例項的，而且，與message不同message是一對一的傳送要對應指定的ExecutionId對應單例項單執行物件。name不能在單個流程定義中有重複】

CancelBoundaryEvent

觸發取消邊界事件時，它首先中斷當前作用域中活動的所有執行。接下來，它開始補償範圍內的所有有效補償邊界事件。補償是同步進行的。

• 注意：事務子流程只允許一個取消邊界事件。
• 注意：如果事務子程序承載巢狀子程序，則僅對已成功完成的子程序觸發補償。
• 注意：如果在具有多例項特徵的事務子流程上放置取消邊界事件，則如果一個例項觸發取消，則邊界事件將取消所有例項。

CompensationBoundaryEvent

補償邊界事件在附加的活動成功完成時啟用。此時，建立對補償事件的相應訂閱。在觸發補償事件或相應的流程例項結束時，將刪除訂閱。

• 觸發補償時，與補償邊界事件關聯的補償處理程式的呼叫次數與成功完成的活動的次數相同。
• 如果將補償邊界事件附加到具有多個例項特徵的活動，則會為每個例項建立補償事件訂閱。
• 如果補償邊界事件附加到迴圈內包含的活動，則每次執行活動時都會建立補償事件訂閱。
• 如果流程例項結束，則取消對補償事件的訂閱。
• 嵌入的子程序不支援補償邊界事件。
• 補償邊界事件必須關聯一個補償處理程式。