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Activiti5----流程監聽器與任務監聽器

本文轉載自   查看原文   2019-06-28 11:10   4364    通用實踐/ 復雜事件處理引擎(CEP)/ 開發經驗/ java經驗集錦/ Activiti/ 工作總結/ SpringBoot/ 工作流引擎/ BPM/ 規則引擎

首先創建流程監聽器和任務監聽器的實體類，個人比較喜歡使用Delegate Expression方式，其他兩種方式也可以


流程監聽器


   
   
  
  
          
     
           
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              package org.mpc.final_activiti; 
             
     
            
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              import java.io.Serializable; 
             
     
            
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              import org.activiti.engine.delegate.DelegateExecution; 
             
     
            
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              import org.activiti.engine.delegate.ExecutionListener; 
             
     
            
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              import org.activiti.engine.delegate.Expression; 
             
     
            
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              /** 
             
     
            
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               *  
             
     
            
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               * 可以使用 CLASS ,EXPRESSION,DELEGATE EXPRESSSION三種方式來創建監聽器，這里使用第三種方式，其他兩種方式和 
             
     
            
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               * 在servicetask中的使用方式相同 
             
     
            
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               *  
             
     
            
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               * */ 
             
     
            
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              public 
              class ExectuionListenerDemo implements Serializable, ExecutionListener { 
             
     
            
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              /** 
             
     
            
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               * @Fields serialVersionUID : TODO(用一句話描述這個變量表示什么) 
             
     
            
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               */ 
             
     
            
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              private 
              static 
              final 
              long serialVersionUID = 
              8513750196548027535L; 
             
     
            
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              private Expression message; 
             
     
            
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              public Expression getMessage() { 
             
     
            
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              return message; 
             
     
            
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               } 
             
     
            
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              public void setMessage(Expression message) { 
             
     
            
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              this.message = message; 
             
     
            
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               } 
             
     
            
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              @Override 
             
     
            
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              public void notify(DelegateExecution execution) throws Exception { 
             
     
            
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               System.out.println( 
              "流程監聽器" + message.getValue(execution)); 
             
     
            
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               } 
             
     
            
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               } 
             
     
            
    37.

任務監聽器 


   
   
  
  
          
     
           
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              package org.mpc.final_activiti; 
             
     
            
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              import java.io.Serializable; 
             
     
            
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              import org.activiti.engine.delegate.DelegateTask; 
             
     
            
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              import org.activiti.engine.delegate.Expression; 
             
     
            
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              import org.activiti.engine.delegate.TaskListener; 
             
     
            
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              /** 
             
     
            
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               *  
             
     
            
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               * 任務監聽器，實現TaskListener接口 
             
     
            
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               *  
             
     
            
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               * */ 
             
     
            
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              public 
              class TaskListenerDemo implements Serializable, TaskListener { 
             
     
            
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              private Expression arg; 
             
     
            
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              public Expression getArg() { 
             
     
            
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              return arg; 
             
     
            
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               } 
             
     
            
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              public void setArg(Expression arg) { 
             
     
            
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              this.arg = arg; 
             
     
            
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               } 
             
     
            
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              @Override 
             
     
            
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              public void notify(DelegateTask delegateTask) { 
             
     
            
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               System.out.println( 
              "任務監聽器:" + arg.getValue(delegateTask)); 
             
     
            
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               } 
             
     
            
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               } 
             
     
            
    31.

這兩個監聽器只是簡單的表明了自己的身份，並打印出在流程中注入給他們的值


接着是流程定義圖




從左到右依次是  空開始事件--排他網關--用戶任務--空中間拋出事件--空結束事件

首先在空白處點擊鼠標，接着在properties選項卡中做如下操作：



然后在排他網關、空中間拋出事件、以及節點之間的箭頭上點擊鼠標同樣可以做如上的操作，這些都流程監聽事件的配置



在usertask上我們特別配置usertask才有的任務監聽器，配置過程如下圖所示



和流程監聽器的配置大同小異呢


展示一下配置結果的xml文件，特別注意一下加注釋的地方


   
   
  
  
          
     
           
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              <?xml version="1.0" encoding="UTF-8"?> 
             
     
            
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              <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"> 
             
     
            
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              <process id="myProcess" name="My process" isExecutable="true"> 
             
     
            
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              <extensionElements> 
             
     
            
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              <activiti:executionListener event="start" delegateExpression="${myprocessListener}"> 
             
     
            
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              <activiti:field name="message"> 
             
     
            
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              <activiti:string><![CDATA[流程啟動]]> 
              </activiti:string> 
             
     
            
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              </activiti:field> 
             
     
            
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              </activiti:executionListener> 
             
     
            
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              <activiti:executionListener event="end" delegateExpression="${myprocessListener}"> 
             
     
            
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              <activiti:field name="message"> 
             
     
            
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              <activiti:string><![CDATA[流程結束]]> 
              </activiti:string> 
             
     
            
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              </activiti:field> 
             
     
            
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              </activiti:executionListener> 
             
     
            
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              </extensionElements> 
             
     
            
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              <startEvent id="startevent1" name="Start"> 
              </startEvent> 
             
     
            
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              <exclusiveGateway id="exclusivegateway1" name="Exclusive Gateway"> 
             
     
            
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              <extensionElements> 
             
     
            
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              <activiti:executionListener event="start" delegateExpression="${myprocessListener}"> 
             
     
            
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              <activiti:field name="message"> 
             
     
            
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              <activiti:string><![CDATA[排他網關開始]]> 
              </activiti:string> 
             
     
            
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              </activiti:field> 
             
     
            
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              </activiti:executionListener> 
             
     
            
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              <activiti:executionListener event="end" delegateExpression="${myprocessListener}"> 
             
     
            
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              <activiti:field name="message"> 
             
     
            
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              <activiti:string><![CDATA[排他網關結束]]> 
              </activiti:string> 
             
     
            
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              </activiti:field> 
             
     
            
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              </activiti:executionListener> 
             
     
            
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              </extensionElements> 
             
     
            
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              </exclusiveGateway> 
             
     
            
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              <sequenceFlow id="flow3" sourceRef="startevent1" targetRef="exclusivegateway1"> 
              </sequenceFlow> 
             
     
            
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              <userTask id="usertask2" name="User Task" activiti:assignee="${user}"> 
             
     
            
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              <extensionElements> 
             
     
            
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              <activiti:taskListener event="create" delegateExpression="${mytaskListener}"> 
             
     
            
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              <activiti:field name="arg"> 
             
     
            
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              <activiti:string><![CDATA[任務啟動]]> 
              </activiti:string> 
             
     
            
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              </activiti:field> 
             
     
            
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              </activiti:taskListener> 
             
     
            
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              <activiti:taskListener event="assignment" delegateExpression="${mytaskListener}"> 
             
     
            
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              <activiti:field name="arg"> 
             
     
            
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              <activiti:string><![CDATA[分配人員]]> 
              </activiti:string> 
             
     
            
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              </activiti:field> 
             
     
            
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              </activiti:taskListener> 
             
     
            
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              <activiti:taskListener event="complete" delegateExpression="${mytaskListener}"> 
             
     
            
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              <activiti:field name="arg"> 
             
     
            
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              <activiti:string><![CDATA[任務完成]]> 
              </activiti:string> 
             
     
            
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              </activiti:field> 
             
     
            
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              </activiti:taskListener> 
             
     
            
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              <!-- 在可視化工具中無法給usertask加上流程監聽器，但是，我們在xml中可以自己敲進去· --> 
             
     
            
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              <activiti:executionListener event="start" delegateExpression="${myprocessListener}"> 
             
     
            
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              <activiti:field name="message"> 
             
     
            
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              <activiti:string><![CDATA[流程啟動任務]]> 
              </activiti:string> 
             
     
            
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              </activiti:field> 
             
     
            
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              </activiti:executionListener> 
             
     
            
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              <activiti:executionListener event="end" delegateExpression="${myprocessListener}"> 
             
     
            
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              <activiti:field name="message"> 
             
     
            
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              <activiti:string><![CDATA[流程關閉任務]]> 
              </activiti:string> 
             
     
            
    58.  
           
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              </activiti:field> 
             
     
            
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              </activiti:executionListener> 
             
     
            
    60.  
           
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              <!-- ........................................................................................................................................ --> 
             
     
            
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              </extensionElements> 
             
     
            
    62.  
           
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              </userTask> 
             
     
            
    63.  
           
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              <sequenceFlow id="flow4" sourceRef="exclusivegateway1" targetRef="usertask2"> 
             
     
            
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              <extensionElements> 
             
     
            
    65.  
           
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              <activiti:executionListener event="take" delegateExpression="${myprocessListener}"> 
             
     
            
    66.  
           
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              <activiti:field name="message"> 
             
     
            
    67.  
           
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              <activiti:string><![CDATA[從排他網關到用戶任務，好長的一段路]]> 
              </activiti:string> 
             
     
            
    68.  
           
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              </activiti:field> 
             
     
            
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              </activiti:executionListener> 
             
     
            
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              </extensionElements> 
             
     
            
    71.  
           
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              </sequenceFlow> 
             
     
            
    72.  
           
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              <intermediateThrowEvent id="noneintermediatethrowevent1" name="NoneThrowEvent"> 
             
     
            
    73.  
           
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              <extensionElements> 
             
     
            
    74.  
           
  74.  
            
     
             
     
            
     
            
     
             
     
              <activiti:executionListener event="start" delegateExpression="${myprocessListener}"> 
             
     
            
    75.  
           
  75.  
            
     
             
     
            
     
            
     
             
     
              <activiti:field name="message"> 
             
     
            
    76.  
           
  76.  
            
     
             
     
            
     
            
     
             
     
              <activiti:string><![CDATA[中間事件開始]]> 
              </activiti:string> 
             
     
            
    77.  
           
  77.  
            
     
             
     
            
     
            
     
             
     
              </activiti:field> 
             
     
            
    78.  
           
  78.  
            
     
             
     
            
     
            
     
             
     
              </activiti:executionListener> 
             
     
            
    79.  
           
  79.  
            
     
             
     
            
     
            
     
             
     
              <activiti:executionListener event="end" delegateExpression="${myprocessListener}"> 
             
     
            
    80.  
           
  80.  
            
     
             
     
            
     
            
     
             
     
              <activiti:field name="message"> 
             
     
            
    81.  
           
  81.  
            
     
             
     
            
     
            
     
             
     
              <activiti:string><![CDATA[中間事件結束]]> 
              </activiti:string> 
             
     
            
    82.  
           
  82.  
            
     
             
     
            
     
            
     
             
     
              </activiti:field> 
             
     
            
    83.  
           
  83.  
            
     
             
     
            
     
            
     
             
     
              </activiti:executionListener> 
             
     
            
    84.  
           
  84.  
            
     
             
     
            
     
            
     
             
     
              </extensionElements> 
             
     
            
    85.  
           
  85.  
            
     
             
     
            
     
            
     
             
     
              </intermediateThrowEvent> 
             
     
            
    86.  
           
  86.  
            
     
             
     
            
     
            
     
             
     
              <sequenceFlow id="flow5" sourceRef="usertask2" targetRef="noneintermediatethrowevent1"> 
              </sequenceFlow> 
             
     
            
    87.  
           
  87.  
            
     
             
     
            
     
            
     
             
     
              <endEvent id="endevent1" name="End"> 
              </endEvent> 
             
     
            
    88.  
           
  88.  
            
     
             
     
            
     
            
     
             
     
              <sequenceFlow id="flow6" sourceRef="noneintermediatethrowevent1" targetRef="endevent1"> 
              </sequenceFlow> 
             
     
            
    89.  
           
  89.  
            
     
             
     
            
     
            
     
             
     
              </process> 
             
     
            
    90.  
           
  90.  
            
     
             
     
            
     
            
     
             
     
              <bpmndi:BPMNDiagram id="BPMNDiagram_myProcess"> 
             
     
            
    91.  
           
  91.  
            
     
             
     
            
     
            
     
             
     
              <bpmndi:BPMNPlane bpmnElement="myProcess" id="BPMNPlane_myProcess"> 
             
     
            
    92.  
           
  92.  
            
     
             
     
            
     
            
     
             
     
              <bpmndi:BPMNShape bpmnElement="startevent1" id="BPMNShape_startevent1"> 
             
     
            
    93.  
           
  93.  
            
     
             
     
            
     
            
     
             
     
              <omgdc:Bounds height="35.0" width="35.0" x="160.0" y="180.0"> 
              </omgdc:Bounds> 
             
     
            
    94.  
           
  94.  
            
     
             
     
            
     
            
     
             
     
              </bpmndi:BPMNShape> 
             
     
            
    95.  
           
  95.  
            
     
             
     
            
     
            
     
             
     
              <bpmndi:BPMNShape bpmnElement="exclusivegateway1" id="BPMNShape_exclusivegateway1"> 
             
     
            
    96.  
           
  96.  
            
     
             
     
            
     
            
     
             
     
              <omgdc:Bounds height="40.0" width="40.0" x="240.0" y="130.0"> 
              </omgdc:Bounds> 
             
     
            
    97.  
           
  97.  
            
     
             
     
            
     
            
     
             
     
              </bpmndi:BPMNShape> 
             
     
            
    98.  
           
  98.  
            
     
             
     
            
     
            
     
             
     
              <bpmndi:BPMNShape bpmnElement="usertask2" id="BPMNShape_usertask2"> 
             
     
            
    99.  
           
  99.  
            
     
             
     
            
     
            
     
             
     
              <omgdc:Bounds height="55.0" width="105.0" x="325.0" y="123.0"> 
              </omgdc:Bounds> 
             
     
            
    100.  
           
  100.  
            
     
             
     
            
     
            
     
             
     
              </bpmndi:BPMNShape> 
             
     
            
    101.  
           
  101.  
            
     
             
     
            
     
            
     
             
     
              <bpmndi:BPMNShape bpmnElement="noneintermediatethrowevent1" id="BPMNShape_noneintermediatethrowevent1"> 
             
     
            
    102.  
           
  102.  
            
     
             
     
            
     
            
     
             
     
              <omgdc:Bounds height="35.0" width="35.0" x="475.0" y="133.0"> 
              </omgdc:Bounds> 
             
     
            
    103.  
           
  103.  
            
     
             
     
            
     
            
     
             
     
              </bpmndi:BPMNShape> 
             
     
            
    104.  
           
  104.  
            
     
             
     
            
     
            
     
             
     
              <bpmndi:BPMNShape bpmnElement="endevent1" id="BPMNShape_endevent1"> 
             
     
            
    105.  
           
  105.  
            
     
             
     
            
     
            
     
             
     
              <omgdc:Bounds height="35.0" width="35.0" x="555.0" y="133.0"> 
              </omgdc:Bounds> 
             
     
            
    106.  
           
  106.  
            
     
             
     
            
     
            
     
             
     
              </bpmndi:BPMNShape> 
             
     
            
    107.  
           
  107.  
            
     
             
     
            
     
            
     
             
     
              <bpmndi:BPMNEdge bpmnElement="flow3" id="BPMNEdge_flow3"> 
             
     
            
    108.  
           
  108.  
            
     
             
     
            
     
            
     
             
     
              <omgdi:waypoint x="195.0" y="197.0"> 
              </omgdi:waypoint> 
             
     
            
    109.  
           
  109.  
            
     
             
     
            
     
            
     
             
     
              <omgdi:waypoint x="260.0" y="170.0"> 
              </omgdi:waypoint> 
             
     
            
    110.  
           
  110.  
            
     
             
     
            
     
            
     
             
     
              </bpmndi:BPMNEdge> 
             
     
            
    111.  
           
  111.  
            
     
             
     
            
     
            
     
             
     
              <bpmndi:BPMNEdge bpmnElement="flow4" id="BPMNEdge_flow4"> 
             
     
            
    112.  
           
  112.  
            
     
             
     
            
     
            
     
             
     
              <omgdi:waypoint x="280.0" y="150.0"> 
              </omgdi:waypoint> 
             
     
            
    113.  
           
  113.  
            
     
             
     
            
     
            
     
             
     
              <omgdi:waypoint x="325.0" y="150.0"> 
              </omgdi:waypoint> 
             
     
            
    114.  
           
  114.  
            
     
             
     
            
     
            
     
             
     
              </bpmndi:BPMNEdge> 
             
     
            
    115.  
           
  115.  
            
     
             
     
            
     
            
     
             
     
              <bpmndi:BPMNEdge bpmnElement="flow5" id="BPMNEdge_flow5"> 
             
     
            
    116.  
           
  116.  
            
     
             
     
            
     
            
     
             
     
              <omgdi:waypoint x="430.0" y="150.0"> 
              </omgdi:waypoint> 
             
     
            
    117.  
           
  117.  
            
     
             
     
            
     
            
     
             
     
              <omgdi:waypoint x="475.0" y="150.0"> 
              </omgdi:waypoint> 
             
     
            
    118.  
           
  118.  
            
     
             
     
            
     
            
     
             
     
              </bpmndi:BPMNEdge> 
             
     
            
    119.  
           
  119.  
            
     
             
     
            
     
            
     
             
     
              <bpmndi:BPMNEdge bpmnElement="flow6" id="BPMNEdge_flow6"> 
             
     
            
    120.  
           
  120.  
            
     
             
     
            
     
            
     
             
     
              <omgdi:waypoint x="510.0" y="150.0"> 
              </omgdi:waypoint> 
             
     
            
    121.  
           
  121.  
            
     
             
     
            
     
            
     
             
     
              <omgdi:waypoint x="555.0" y="150.0"> 
              </omgdi:waypoint> 
             
     
            
    122.  
           
  122.  
            
     
             
     
            
     
            
     
             
     
              </bpmndi:BPMNEdge> 
             
     
            
    123.  
           
  123.  
            
     
             
     
            
     
            
     
             
     
              </bpmndi:BPMNPlane> 
             
     
            
    124.  
           
  124.  
            
     
             
     
            
     
            
     
             
     
              </bpmndi:BPMNDiagram> 
             
     
            
    125.  
           
  125.  
            
     
             
     
            
     
            
     
             
     
              </definitions> 
             
     
            
    126.


為了讓usertak產生一個指定人員的事件，我們給這個usertask弄一個指定人員



然后就是測試代碼


   
   
  
  
          
     
           
  1.  
            
     
             
     
            
     
            
     
             
     
              package final_activiti.progress; 
             
     
            
    2.  
           
  2.  
            
     
             
     
            
     
            
     
             
     
             
     
            
    3.  
           
  3.  
            
     
             
     
            
     
            
     
             
     
              import java.util.HashMap; 
             
     
            
    4.  
           
  4.  
            
     
             
     
            
     
            
     
             
     
              import java.util.Map; 
             
     
            
    5.  
           
  5.  
            
     
             
     
            
     
            
     
             
     
             
     
            
    6.  
           
  6.  
            
     
             
     
            
     
            
     
             
     
              import org.activiti.engine.impl.test.PluggableActivitiTestCase; 
             
     
            
    7.  
           
  7.  
            
     
             
     
            
     
            
     
             
     
              import org.activiti.engine.test.Deployment; 
             
     
            
    8.  
           
  8.  
            
     
             
     
            
     
            
     
             
     
              import org.junit.Test; 
             
     
            
    9.  
           
  9.  
            
     
             
     
            
     
            
     
             
     
              import org.mpc.final_activiti.ExectuionListenerDemo; 
             
     
            
    10.  
           
  10.  
            
     
             
     
            
     
            
     
             
     
              import org.mpc.final_activiti.TaskListenerDemo; 
             
     
            
    11.  
           
  11.  
            
     
             
     
            
     
            
     
             
     
             
     
            
    12.  
           
  12.  
            
     
             
     
            
     
            
     
             
     
              public 
              class ListenersTest extends PluggableActivitiTestCase { 
             
     
            
    13.  
           
  13.  
            
     
             
     
            
     
            
     
             
     
             
     
            
    14.  
           
  14.  
            
     
             
     
            
     
            
     
             
     
              @Test 
             
     
            
    15.  
           
  15.  
            
     
             
     
            
     
            
     
             
     
              @Deployment(resources = 
              "final_activiti/progress/listeners.bpmn") 
             
     
            
    16.  
           
  16.  
            
     
             
     
            
     
            
     
             
     
              public void test() { 
             
     
            
    17.  
           
  17.  
            
     
             
     
            
     
            
     
             
    
               Map<String, Object> map = 
              new HashMap<String, Object>(); 
             
     
            
    18.  
           
  18.  
            
     
             
     
            
     
            
     
             
    
               map.put( 
              "myprocessListener", 
              new ExectuionListenerDemo()); 
             
     
            
    19.  
           
  19.  
            
     
             
     
            
     
            
     
             
    
               map.put( 
              "mytaskListener", 
              new TaskListenerDemo()); 
             
     
            
    20.  
           
  20.  
            
     
             
     
            
     
            
     
             
    
               map.put( 
              "user", 
              "mpc"); 
             
     
            
    21.  
           
  21.  
            
     
             
     
            
     
            
     
             
    
               runtimeService.startProcessInstanceByKey( 
              "myProcess", map); 
             
     
            
    22.  
           
  22.  
            
     
             
     
            
     
            
     
             
    
               taskService.complete(taskService.createTaskQuery().singleResult() 
             
     
            
    23.  
           
  23.  
            
     
             
     
            
     
            
     
             
    
               .getId()); 
             
     
            
    24.  
           
  24.  
            
     
             
     
            
     
            
     
             
    
               ; 
             
     
            
    25.  
           
  25.  
            
     
             
     
            
     
            
     
             
    
               } 
             
     
            
    26.  
           
  26.  
            
     
             
     
            
     
            
     
             
     
             
     
            
    27.  
           
  27.  
            
     
             
     
            
     
            
     
             
    
               } 
             
     
            
    28.

測試結果：


分析：

1.我們給usertask定義的流程監聽實現了

2.usertask中先執行流程監聽的start、然后是分配人員、任務啟動、任務完成、流程關閉任務；任務是包含在流程中的

原文地址：https://blog.csdn.net/u012613903/article/details/43732941


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