Activiti6.0源碼初探-helloword_idea-2

原創 提拉米秋 2019-10-25 13:52

這是本人工作流引擎開發學習系列的第二篇。展示的是一個簡單的工作流審批demo。
構建的Maven項目結構圖：
在這裏插入圖片描述
DemoMain：

package com.imooc.activiti.helloworld;

import com.google.common.collect.Maps;
import org.activiti.engine.*;
import org.activiti.engine.form.FormProperty;
import org.activiti.engine.form.TaskFormData;
import org.activiti.engine.impl.form.DateFormType;
import org.activiti.engine.impl.form.StringFormType;
import org.activiti.engine.repository.Deployment;
import org.activiti.engine.repository.DeploymentBuilder;
import org.activiti.engine.repository.ProcessDefinition;
import org.activiti.engine.runtime.ProcessInstance;
import org.activiti.engine.task.Task;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import java.util.Map;
import java.util.Scanner;

/**
 * @Author: EagleLin
 * @Date: 2019/10/13 23:28
 * @Version 1.0
 * @Title:
 * @Description:啓動類
 */
public class DemoMain {

    private static final Logger LOGGER = LoggerFactory.getLogger(DemoMain.class);

    public static void main(String[] args) throws ParseException {

        LOGGER.info("啓動我們的程序");

        //創建流程引擎
        ProcessEngine processEngine = getProcessEngine();

        //部署流程定義文件
        ProcessDefinition processDefinition = getProcessDefinition(processEngine);

        //啓動運行流程
        RuntimeService runtimeService = processEngine.getRuntimeService();
        ProcessInstance processInstance = runtimeService.startProcessInstanceById(processDefinition.getId());
        LOGGER.info("啓動流程 {}", processInstance.getProcessDefinitionKey());

        //處理流程任務
        processTask(processEngine, processInstance);
        LOGGER.info("結束我們的程序");
    }

    private static void processTask(ProcessEngine processEngine, ProcessInstance processInstance) throws ParseException {
        Scanner scanner = new Scanner(System.in);
        while (processInstance != null && !processInstance.isEnded()) {
            TaskService taskService = processEngine.getTaskService();
            List<Task> list = taskService.createTaskQuery().list();
            LOGGER.info("待處理任務數量{}", list.size());
            for (Task task : list) {
                LOGGER.info("待處理任務{}", task.getName());
                Map<String, Object> variables = getMap(processEngine, scanner, task);
                taskService.complete(task.getId(), variables);
                processInstance = processEngine.getRuntimeService().createProcessInstanceQuery().processInstanceId(processInstance.getId()).singleResult();
            }
        }
        scanner.close();
    }

    private static Map<String, Object> getMap(ProcessEngine processEngine, Scanner scanner, Task task) throws ParseException {
        FormService formService = processEngine.getFormService();
        TaskFormData taskFormData = formService.getTaskFormData(task.getId());
        List<FormProperty> formProperties = taskFormData.getFormProperties();
        Map<String, Object> variables = Maps.newHashMap();
        String line = null;
        for (FormProperty property: formProperties) {
            if(StringFormType.class.isInstance(property.getType())){
                LOGGER.info("請輸入 {} ?", property.getName());
                line = scanner.nextLine();
                variables.put(property.getId(), line);
            }else if(DateFormType.class.isInstance(property.getType())){
                LOGGER.info("請輸入 {} ? 格式{yyyy-mm-dd}", property.getName());
                line = scanner.nextLine();
                SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-mm-dd");
                Date date = dateFormat.parse(line);
                variables.put(property.getId(), date);
            }else{
                LOGGER.info("類型暫不支持 {} ", property.getType());
            }
            LOGGER.info("你輸入的內容是 [{}]", line);
        }
        return variables;
    }

    private static ProcessDefinition getProcessDefinition(ProcessEngine processEngine) {
        RepositoryService repositoryService = processEngine.getRepositoryService();
        DeploymentBuilder deploymentBuilder = repositoryService.createDeployment();
        deploymentBuilder.addClasspathResource("second_approve.bpmn20.xml");
        Deployment deployment = deploymentBuilder.deploy();
        String deploymentId = deployment.getId();
        ProcessDefinition processDefinition = repositoryService.createProcessDefinitionQuery().deploymentId(deploymentId).singleResult();
        LOGGER.info("流程定義文件{},流程的ID {}", processDefinition.getName(), deploymentId);
        return processDefinition;
    }

    private static ProcessEngine getProcessEngine() {
        ProcessEngineConfiguration cfg = ProcessEngineConfiguration.createStandaloneInMemProcessEngineConfiguration();
        ProcessEngine processEngine = cfg.buildProcessEngine();
        String name = processEngine.getName();
        String version = ProcessEngine.VERSION;
        LOGGER.info("流程引擎的名稱{},版本{}", name, version);
        return processEngine;
    }
}

second_approve.bpmn20.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: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="second_approve" name="二級審批流程" isExecutable="true">
    <startEvent id="startEvent" name="開始"></startEvent>
    <userTask id="submitForm" name="填寫審批信息">
      <extensionElements>
        <activiti:formProperty id="message" name="申請信息" type="string" required="true"></activiti:formProperty>
        <activiti:formProperty id="name" name="申請人姓名" type="string" required="true"></activiti:formProperty>
        <activiti:formProperty id="submitTime" name="提交時間" type="date" datePattern="yyyy-mm-dd" required="true"></activiti:formProperty>
        <activiti:formProperty id="submitType" name="確認申請" type="string" required="true"></activiti:formProperty>
      </extensionElements>
    </userTask>
    <sequenceFlow id="flow1" sourceRef="startEvent" targetRef="submitForm"></sequenceFlow>
    <userTask id="tl_approve" name="主管審批">
      <extensionElements>
        <activiti:formProperty id="tlApprove" name="主管審批結果" type="string"></activiti:formProperty>
        <activiti:formProperty id="tlMessage" name="主管備註" type="string" required="true"></activiti:formProperty>
      </extensionElements>
    </userTask>
    <exclusiveGateway id="decideTLApprove" name="主管審批校驗"></exclusiveGateway>
    <sequenceFlow id="flow4" sourceRef="tl_approve" targetRef="decideTLApprove"></sequenceFlow>
    <userTask id="hr_approve" name="人事審批">
      <extensionElements>
        <activiti:formProperty id="hrApprove" name="人事審批結果" type="string" required="true"></activiti:formProperty>
        <activiti:formProperty id="hrMessage" name="人事審批備註" type="string" required="true"></activiti:formProperty>
      </extensionElements>
    </userTask>
    <sequenceFlow id="flow6" sourceRef="decideTLApprove" targetRef="hr_approve">
      <conditionExpression xsi:type="tFormalExpression"><![CDATA[${tlApprove == "y" || tlApprove == "Y"}]]></conditionExpression>
    </sequenceFlow>
    <exclusiveGateway id="decideHRApprove" name="人事審批校驗"></exclusiveGateway>
    <sequenceFlow id="flow7" sourceRef="hr_approve" targetRef="decideHRApprove"></sequenceFlow>
    <endEvent id="endEvent" name="結束"></endEvent>
    <sequenceFlow id="flow8" sourceRef="decideHRApprove" targetRef="endEvent">
      <conditionExpression xsi:type="tFormalExpression"><![CDATA[${hrApprove == "y" || hrApprove == "Y"}]]></conditionExpression>
    </sequenceFlow>
    <exclusiveGateway id="decideSubmit" name="提交OR取消"></exclusiveGateway>
    <sequenceFlow id="flow9" sourceRef="submitForm" targetRef="decideSubmit"></sequenceFlow>
    <sequenceFlow id="flow10" sourceRef="decideSubmit" targetRef="tl_approve">
      <conditionExpression xsi:type="tFormalExpression"><![CDATA[${submitType == "y" || submitType == "Y"}]]></conditionExpression>
    </sequenceFlow>
    <endEvent id="endEventCancel" name="取消"></endEvent>
    <sequenceFlow id="flow11" sourceRef="decideSubmit" targetRef="endEventCancel">
      <conditionExpression xsi:type="tFormalExpression"><![CDATA[${submitType == "n" || submitType == "N"}]]></conditionExpression>
    </sequenceFlow>
    <sequenceFlow id="flow12" sourceRef="decideTLApprove" targetRef="submitForm">
      <conditionExpression xsi:type="tFormalExpression"><![CDATA[${tlApprove == "n" || tlApprove == "N"}]]></conditionExpression>
    </sequenceFlow>
    <sequenceFlow id="flow13" sourceRef="decideHRApprove" targetRef="submitForm">
      <conditionExpression xsi:type="tFormalExpression"><![CDATA[${hrApprove == "n" || hrApprove == "N"}]]></conditionExpression>
    </sequenceFlow>
  </process>
  <bpmndi:BPMNDiagram id="BPMNDiagram_second_approve">
    <bpmndi:BPMNPlane bpmnElement="second_approve" id="BPMNPlane_second_approve">
      <bpmndi:BPMNShape bpmnElement="startEvent" id="BPMNShape_startEvent">
        <omgdc:Bounds height="35.0" width="35.0" x="52.0" y="180.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="submitForm" id="BPMNShape_submitForm">
        <omgdc:Bounds height="55.0" width="105.0" x="131.0" y="170.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="tl_approve" id="BPMNShape_tl_approve">
        <omgdc:Bounds height="55.0" width="105.0" x="350.0" y="170.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="decideTLApprove" id="BPMNShape_decideTLApprove">
        <omgdc:Bounds height="40.0" width="40.0" x="490.0" y="177.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="hr_approve" id="BPMNShape_hr_approve">
        <omgdc:Bounds height="55.0" width="105.0" x="566.0" y="170.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="decideHRApprove" id="BPMNShape_decideHRApprove">
        <omgdc:Bounds height="40.0" width="40.0" x="714.0" y="177.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="endEvent" id="BPMNShape_endEvent">
        <omgdc:Bounds height="35.0" width="35.0" x="800.0" y="180.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="decideSubmit" id="BPMNShape_decideSubmit">
        <omgdc:Bounds height="40.0" width="40.0" x="280.0" y="177.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="endEventCancel" id="BPMNShape_endEventCancel">
        <omgdc:Bounds height="35.0" width="35.0" x="390.0" y="260.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNEdge bpmnElement="flow1" id="BPMNEdge_flow1">
        <omgdi:waypoint x="87.0" y="197.0"></omgdi:waypoint>
        <omgdi:waypoint x="131.0" y="197.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow4" id="BPMNEdge_flow4">
        <omgdi:waypoint x="455.0" y="197.0"></omgdi:waypoint>
        <omgdi:waypoint x="490.0" y="197.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow6" id="BPMNEdge_flow6">
        <omgdi:waypoint x="530.0" y="197.0"></omgdi:waypoint>
        <omgdi:waypoint x="566.0" y="197.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow7" id="BPMNEdge_flow7">
        <omgdi:waypoint x="671.0" y="197.0"></omgdi:waypoint>
        <omgdi:waypoint x="714.0" y="197.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow8" id="BPMNEdge_flow8">
        <omgdi:waypoint x="754.0" y="197.0"></omgdi:waypoint>
        <omgdi:waypoint x="800.0" y="197.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow9" id="BPMNEdge_flow9">
        <omgdi:waypoint x="236.0" y="197.0"></omgdi:waypoint>
        <omgdi:waypoint x="280.0" y="197.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow10" id="BPMNEdge_flow10">
        <omgdi:waypoint x="320.0" y="197.0"></omgdi:waypoint>
        <omgdi:waypoint x="350.0" y="197.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow11" id="BPMNEdge_flow11">
        <omgdi:waypoint x="300.0" y="217.0"></omgdi:waypoint>
        <omgdi:waypoint x="300.0" y="276.0"></omgdi:waypoint>
        <omgdi:waypoint x="390.0" y="277.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow12" id="BPMNEdge_flow12">
        <omgdi:waypoint x="510.0" y="217.0"></omgdi:waypoint>
        <omgdi:waypoint x="508.0" y="332.0"></omgdi:waypoint>
        <omgdi:waypoint x="362.0" y="332.0"></omgdi:waypoint>
        <omgdi:waypoint x="182.0" y="332.0"></omgdi:waypoint>
        <omgdi:waypoint x="183.0" y="225.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow13" id="BPMNEdge_flow13">
        <omgdi:waypoint x="734.0" y="177.0"></omgdi:waypoint>
        <omgdi:waypoint x="732.0" y="130.0"></omgdi:waypoint>
        <omgdi:waypoint x="178.0" y="130.0"></omgdi:waypoint>
        <omgdi:waypoint x="183.0" y="170.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
    </bpmndi:BPMNPlane>
  </bpmndi:BPMNDiagram>
</definitions>

pom.xml:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.imooc.activiti</groupId>
    <artifactId>activiti6-helloworld</artifactId>
    <version>1.0-SNAPSHOT</version>

    <dependencies>

        <dependency>
            <groupId>org.activiti</groupId>
            <artifactId>activiti-engine</artifactId>
            <version>6.0.0</version>
        </dependency>

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.11</version>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-classic</artifactId>
            <version>1.1.11</version>
        </dependency>

        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>23.0</version>
        </dependency>

        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</artifactId>
            <version>1.3.176</version>
        </dependency>

    </dependencies>

</project>

效果圖：
在這裏插入圖片描述

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