基於springboot的flowable工作流實戰流程分析

<?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-insmtece" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:flowable="http://flowable.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.flowable.org/processdef">
  <process id="leave_approval" name="請假審批" isExecutable="true">
    <startEvent id="start" name="開始" flowable:initiator="startuser" flowable:formFieldValidation="true"></startEvent>
    <userTask id="stu_task" name="學生" flowable:candidateGroups="stu_group" flowable:formFieldValidation="true"></userTask>
    <sequenceFlow id="flow1" sourceRef="start" targetRef="stu_task"></sequenceFlow>
    <userTask id="te_task" name="老師" flowable:candidateGroups="te_group" flowable:formFieldValidation="true"></userTask>
    <exclusiveGateway id="getway1" name="網關1"></exclusiveGateway>
    <userTask id="mte_task" name="校長" flowable:candidateGroups="mte_group" flowable:formFieldValidation="true"></userTask>
    <exclusiveGateway id="getway2" name="網關2"></exclusiveGateway>
    <endEvent id="end" name="結束"></endEvent>
    <sequenceFlow id="flow1" name="請假" sourceRef="stu_task" targetRef="te_task" skipExpression="${command=='agree'}"></sequenceFlow>
    <sequenceFlow id="flow3_1" name="同意" sourceRef="getway1" targetRef="mte_task">
      <conditionExpression xsi:type="tFormalExpression"><![CDATA[${command=='agree'}]]></conditionExpression>
    </sequenceFlow>
    <sequenceFlow id="flow2" name="審批" sourceRef="te_task" targetRef="getway1"></sequenceFlow>
    <sequenceFlow id="flow3_2" name="拒絕" sourceRef="getway1" targetRef="stu_task">
      <conditionExpression xsi:type="tFormalExpression"><![CDATA[${command=='refuse'}]]></conditionExpression>
    </sequenceFlow>
    <sequenceFlow id="flow4" name="審批" sourceRef="mte_task" targetRef="getway2"></sequenceFlow>
    <sequenceFlow id="flow4_1" name="同意" sourceRef="getway2" targetRef="end" skipExpression="${command=='free'}">
      <conditionExpression xsi:type="tFormalExpression"><![CDATA[${command=='agree'}]]></conditionExpression>
    </sequenceFlow>
    <sequenceFlow id="flow4_2" name="拒絕" sourceRef="getway2" targetRef="stu_task">
      <conditionExpression xsi:type="tFormalExpression"><![CDATA[${command=='refuse'}]]></conditionExpression>
    </sequenceFlow>
  </process>
  <bpmndi:BPMNDiagram id="BPMNDiagram_leave_approval">
    這裡沒用，先去掉
  </bpmndi:BPMNDiagram>
</definitions>

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.3.0.RELEASE</version>
    <relativePath/> <!-- lookup parent from repository -->
</parent>

<dependency>
    <groupId>org.flowable</groupId>
    <artifactId>flowable-spring-boot-starter</artifactId>
    <version>6.6.0</version>
</dependency>
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>5.1.45</version>
</dependency>

spring:
  datasource:
    url: jdbc:mysql://localhost:3306/flowable?useSSL=false&characterEncoding=UTF-8&serverTimezone=GMT%2B8
    driver-class-name: com.mysql.jdbc.Driver
    username: root
    password: 123456

import lombok.extern.slf4j.Slf4j;
import org.flowable.engine.HistoryService;
import org.flowable.engine.RepositoryService;
import org.flowable.engine.RuntimeService;
import org.flowable.engine.history.HistoricProcessInstance;
import org.flowable.engine.repository.Deployment;
import org.flowable.engine.repository.ProcessDefinition;
import org.flowable.engine.runtime.Execution;
import org.flowable.engine.runtime.ProcessInstance;
import org.flowable.idm.api.Group;
import org.flowable.idm.api.User;
import org.flowable.task.api.Task;
import org.flowable.task.api.history.HistoricTaskInstance;
import org.springframework.beans.factory.annotation.Autowired;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.zip.ZipInputStream;

/**
 * TestFlowable
 *
 * @Author 
 * @Date: 2021/10/17 23:35
 * @Version 1.0
 */
@Slf4j
public class TestFlowable {

    @Autowired
    private RepositoryService repositoryService;

    @Autowired
    private RuntimeService runtimeService;

    @Autowired
    private HistoryService historyService;

    @Autowired
    private org.flowable.engine.TaskService taskService;

    @Autowired
    private org.flowable.engine.IdentityService identityService;

    public void createDeploymentZip() {

        /*
         * @Date: 2021/10/17 23:38
         * Step 1: 部署xml（壓縮到zip形式，直接xml需要配置相對路徑，麻煩，暫不用）
         */
        try {
            File zipTemp = new File("f:/zhan_test.bpmn20.xml");
            ZipInputStream zipInputStream = new ZipInputStream(new FileInputStream(zipTemp));
            Deployment deployment = repositoryService
                    .createDeployment()
                    .addZipInputStream(zipInputStream)
                    .deploy();
            log.info("部署成功:{}", deployment.getId());
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }

        /*
         * @Date: 2021/10/17 23:40
         * Step 2: 查詢部署的流程定義
         */
        List<ProcessDefinition> list = repositoryService.createProcessDefinitionQuery().processDefinitionKey("leave_approval").list();
        List<ProcessDefinition> pages = repositoryService.createProcessDefinitionQuery().processDefinitionKey("leave_approval").listPage(1, 30);

        /*
         * @Date: 2021/10/17 23:40
         * Step 3: 啟動流程，創建實例
         */
        String processDefinitionKey = "leave_approval";//流程定義的key,對應請假的流程圖
        String businessKey = "schoolleave";//業務代碼，根據自己的業務用
        Map<String, Object> variablesDefinition = new HashMap<>();//流程變量，可以自定義擴充
        ProcessInstance processInstance = runtimeService.startProcessInstanceByKey(processDefinitionKey, businessKey, variablesDefinition);
        log.info("啟動成功:{}", processInstance.getId());

        /*
         * @Date: 2021/10/17 23:40
         * Step 4: 查詢指定流程所有啟動的實例列表
         * 列表，或 分頁 刪除
         */
        List<Execution> executions = runtimeService.createExecutionQuery().processDefinitionKey("leave_approval").list();
        List<Execution> executionPages = runtimeService.createExecutionQuery().processDefinitionKey("leave_approval").listPage(1, 30);
//        runtimeService.deleteProcessInstance(processInstanceId, deleteReason); //刪除實例

        /*
         * @Date: 2021/10/17 23:40
         * Step 5: 學生查詢可以操作的任務,並完成任務
         */
        String candidateGroup = "stu_group"; //候選組 xml文件裡面的 flowable:candidateGroups="stu_group"
        List<Task> taskList = taskService.createTaskQuery().taskCandidateGroup(candidateGroup).orderByTaskCreateTime().desc().list();
        for (Task task : taskList) {
            // 申領任務
            taskService.claim(task.getId(), "my");
            // 完成
            taskService.complete(task.getId());
        }

        /*
         * @Date: 2021/10/17 23:40
         * Step 6: 老師查詢可以操作的任務,並完成任務
         */
        String candidateGroupTe = "te_group"; //候選組 xml文件裡面的 flowable:candidateGroups="te_group"
        List<Task> taskListTe = taskService.createTaskQuery().taskCandidateGroup(candidateGroupTe).orderByTaskCreateTime().desc().list();
        for (Task task : taskListTe) {
            // 申領任務
            taskService.claim(task.getId(), "myte");
            // 完成
            Map<String, Object> variables = new HashMap<>();
            variables.put("command","agree"); //攜帶變量，用於網關流程的條件判定，這裡的條件是同意
            taskService.complete(task.getId(), variables);
        }

        /*
         * @Date: 2021/10/18 0:17
         * Step 7: 歷史查詢，因為一旦流程執行完畢，活動的數據都會被清空，上面查詢的接口都查不到數據，但是提供歷史查詢接口
         */
        // 歷史流程實例
        List<HistoricProcessInstance> historicProcessList = historyService.createHistoricProcessInstanceQuery().processDefinitionKey("leave_approval").list();
        // 歷史任務
        List<HistoricTaskInstance> historicTaskList = historyService.createHistoricTaskInstanceQuery().processDefinitionKey("leave_approval").list();
        // 實例歷史變量 , 任務歷史變量
        // historyService.createHistoricVariableInstanceQuery().processInstanceId(processInstanceId);
        // historyService.createHistoricVariableInstanceQuery().taskId(taskId);

        // *****************************************************分隔符********************************************************************
        // *****************************************************分隔符********************************************************************
        // 可能還需要的API
        // 移動任務，人為跳轉任務
        // runtimeService.createChangeActivityStateBuilder().processInstanceId(processInstanceId)
        //       .moveActivityIdTo(currentActivityTaskId, newActivityTaskId).changeState();

        // 如果在數據庫配置瞭分組和用戶，還會用到
        List<User> users = identityService.createUserQuery().list();    //用戶查詢，用戶id對應xml 裡面配置的用戶
        List<Group> groups = identityService.createGroupQuery().list(); //分組查詢，分組id對應xml 裡面配置的分組 如 stu_group，te_group 在表裡是id的值

        // 另外，每個查詢後面都可以拼條件，內置恁多查詢，包括模糊查詢，大小比較都有
    }
}