Flowable从零单排（六）实例代码

清疚 2022-11-04 12:24 149阅读 0赞

public class TenMinuteTutorial {
    
      public static void main(String[] args) {
    
        // 创建Flowable流程引擎
        ProcessEngine processEngine = ProcessEngineConfiguration
          .createStandaloneProcessEngineConfiguration()
          .buildProcessEngine();
    
        // 获取Flowable服务
        RepositoryService repositoryService = processEngine.getRepositoryService();
        RuntimeService runtimeService = processEngine.getRuntimeService();
    
        // 部署流程定义
        repositoryService.createDeployment()
          .addClasspathResource("FinancialReportProcess.bpmn20.xml")
          .deploy();
    
        // 启动流程实例
        String procId = runtimeService.startProcessInstanceByKey("financialReport").getId();
    
        // 获取第一个任务
        TaskService taskService = processEngine.getTaskService();
        List<Task> tasks = taskService.createTaskQuery().taskCandidateGroup("accountancy").list();
        for (Task task : tasks) {
          System.out.println("Following task is available for accountancy group: " + task.getName());
    
          // 申领任务
          taskService.claim(task.getId(), "fozzie");
        }
    
        // 验证Fozzie获取了任务
        tasks = taskService.createTaskQuery().taskAssignee("fozzie").list();
        for (Task task : tasks) {
          System.out.println("Task for fozzie: " + task.getName());
    
          // 完成任务
          taskService.complete(task.getId());
        }
    
        System.out.println("Number of tasks for fozzie: "
                + taskService.createTaskQuery().taskAssignee("fozzie").count());
    
        // 获取并申领第二个任务
        tasks = taskService.createTaskQuery().taskCandidateGroup("management").list();
        for (Task task : tasks) {
          System.out.println("Following task is available for management group: " + task.getName());
          taskService.claim(task.getId(), "kermit");
        }
    
        // 完成第二个任务并结束流程
        for (Task task : tasks) {
          taskService.complete(task.getId());
        }
    
        // 验证流程已经结束
        HistoryService historyService = processEngine.getHistoryService();
        HistoricProcessInstance historicProcessInstance =
          historyService.createHistoricProcessInstanceQuery().processInstanceId(procId).singleResult();
        System.out.println("Process instance end time: " + historicProcessInstance.getEndTime());
      }
    
    }

*FinancialReportProcess.bpmn20.xml*

<definitions id="definitions"
      targetNamespace="http://flowable.org/bpmn20"
      xmlns:flowable="http://flowable.org/bpmn"
      xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL">
    
        <process id="financialReport" name="Monthly financial report reminder process">
    
          <startEvent id="theStart" />
    
          <sequenceFlow id="flow1" sourceRef="theStart" targetRef="writeReportTask" />
    
          <userTask id="writeReportTask" name="Write monthly financial report" >
            <documentation>
              Write monthly financial report for publication to shareholders.
            </documentation>
            <potentialOwner>
              <resourceAssignmentExpression>
                <formalExpression>accountancy</formalExpression>
              </resourceAssignmentExpression>
            </potentialOwner>
          </userTask>
    
          <sequenceFlow id="flow2" sourceRef="writeReportTask" targetRef="verifyReportTask" />
    
          <userTask id="verifyReportTask" name="Verify monthly financial report" >
            <documentation>
              Verify monthly financial report composed by the accountancy department.
              This financial report is going to be sent to all the company shareholders.
            </documentation>
            <potentialOwner>
              <resourceAssignmentExpression>
                <formalExpression>management</formalExpression>
              </resourceAssignmentExpression>
            </potentialOwner>
          </userTask>
    
          <sequenceFlow id="flow3" sourceRef="verifyReportTask" targetRef="theEnd" />
    
          <endEvent id="theEnd" />
    
        </process>
    
    </definitions>

可以看出这个业务流程太简单了，不能实际使用。但只要继续学习Flowable中可用的BPMN 2.0结构，就可以通过以下元素增强业务流程：

*  定义**网关（gateway）**使经理可以选择：驳回财务报告，并重新为会计师创建任务；或者接受报告。
 *  定义并使用**变量（variables）**存储或引用报告，并可以在表单中显示它。
 *  在流程结束处定义**服务任务（service task）**，将报告发送给每一个投资人。
 *  等等。