Activity工作流开发简单介绍

淩亂°似流年 2022-12-08 05:10 213阅读 0赞

# 1. 工作流表 #

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3F3cXczMzMzMzMz_size_16_color_FFFFFF_t_70_pic_left]  
由图中可以看到，依赖中已经集成了mybatis框架，在第一次初始化流程引擎（ProcessEngine）时，会自动创建24张表（图示版本）。

act_evt_log, 
    act_ge_bytearray, 
    act_ge_property, 
    act_hi_actinst, 
    act_hi_attachment, 
    act_hi_comment, 
    act_hi_detail, 
    act_hi_identitylink, 
    act_hi_procinst,
    act_hi_taskinst, 
    act_hi_varinst, 
    act_id_group, 
    act_id_info, 
    act_id_membership, 
    act_id_user,
    act_re_deployment, 
    act_re_model, 
    act_re_procdef, 
    act_ru_event_subscr, 
    act_ru_execution, 
    act_ru_identitylink, 
    act_ru_job, 
    act_ru_task, 
    act_ru_variable

> 1.  `act_re_*`: 're’表示repository。 这个前缀的表包含了流程定义和流程静态资源 （图片，规则，等等）。
> 2.  `act_ru_*`: 'ru’表示runtime。 这些运行时的表，包含流程实例，任务，变量，异步任务，等运行中的数据。 activiti只在流程实例执行过程中保存这些数据， 在流程结束时就会删除这些记录。 这样运行时表可以一直很小速度很快。
> 3.  `act_id_*`: 'id’表示identity。 这些表包含身份信息，比如用户，组等等。
> 4.  `act_hi_*`: 'hi’表示history。 这些表包含历史数据，比如历史流程实例， 变量，任务等等。
> 5.  `act_ge_*`: 通用数据， 用于不同场景下。  
>     *参考：[Activity工作流入门][Activity]*

**重点介绍下一下几张表**

1.  `act_ge_bytearray`：保存的工作流`.bpmn`以及对应的图片`.png`二进制文件
2.  `act_re_deployment`：保存部署
3.  `act_re_procdef`：保存部署的流程
4.  `act_ru_execution`：保存等待执行的操作，包含启动、结束事件、任务、gateway流动等
5.  `act_ru_task`：保存等待执行的任务
6.  `act_ru_variable`：保存任务执行时定义的量
7.  `act_hi_actinst`：保存所有执行（已执行和未执行）的操作，包含启动、结束事件、任务、gateway流动等
8.  `act_hi_procinst`：保存部署的流程的历史
9.  `act_hi_taskinst`：保存已经执行的任务

# 2. 实战 #

## 2.1 流程定义 ##

定义一个网站开发的工作模式，开发工作准备好之后就同时让web端、server端、mobile端同时开发，所有的都完成后才算结束。（使用eclipse或者idea插件完成制图工作）  
流程如图：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3F3cXczMzMzMzMz_size_16_color_FFFFFF_t_70_pic_center]  
流程代码：

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
    <definitions xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL" 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" xmlns:tns="http://www.activiti.org/test" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" expressionLanguage="http://www.w3.org/1999/XPath" id="m1600330675002" name="" targetNamespace="http://www.activiti.org/test" typeLanguage="http://www.w3.org/2001/XMLSchema">
      <process id="devWebsite" isClosed="false" isExecutable="true" name="开发网站" processType="None">
        <startEvent id="startevent1" name="start"/>
        <userTask activiti:exclusive="true" id="startDev" name="开发"/>
        <parallelGateway gatewayDirection="Unspecified" id="mutipathDevParallelGateway" name="多线路共同开发"/>
        <userTask activiti:exclusive="true" id="webDev" name="web端"/>
        <userTask activiti:exclusive="true" id="serverDev" name="server端"/>
        <userTask activiti:exclusive="true" id="mobileDev" name="mobile端"/>
        <endEvent id="endevent1" name="end"/>
        <sequenceFlow id="_8" sourceRef="startevent1" targetRef="startDev"/>
        <sequenceFlow id="_9" sourceRef="startDev" targetRef="mutipathDevParallelGateway"/>
        <sequenceFlow id="_10" sourceRef="mutipathDevParallelGateway" targetRef="webDev"/>
        <sequenceFlow id="_11" sourceRef="mutipathDevParallelGateway" targetRef="serverDev"/>
        <sequenceFlow id="_2" sourceRef="mutipathDevParallelGateway" targetRef="mobileDev"/>
        <sequenceFlow id="_3" sourceRef="webDev" targetRef="endevent1"/>
        <sequenceFlow id="_4" sourceRef="serverDev" targetRef="endevent1"/>
        <sequenceFlow id="_5" sourceRef="mobileDev" targetRef="endevent1"/>
      </process>
      <bpmndi:BPMNDiagram documentation="background=#FFFFFF;count=1;horizontalcount=1;orientation=0;width=842.4;height=1195.2;imageableWidth=832.4;imageableHeight=1185.2;imageableX=5.0;imageableY=5.0" id="Diagram-_1" name="New Diagram">
        <bpmndi:BPMNPlane bpmnElement="devWebsite">
          <bpmndi:BPMNShape bpmnElement="startevent1" id="Shape-startevent1">
            <omgdc:Bounds height="32.0" width="32.0" x="325.0" y="30.0"/>
            <bpmndi:BPMNLabel>
              <omgdc:Bounds height="32.0" width="32.0" x="0.0" y="0.0"/>
            </bpmndi:BPMNLabel>
          </bpmndi:BPMNShape>
          <bpmndi:BPMNShape bpmnElement="startDev" id="Shape-startDev">
            <omgdc:Bounds height="55.0" width="85.0" x="305.0" y="135.0"/>
            <bpmndi:BPMNLabel>
              <omgdc:Bounds height="55.0" width="85.0" x="0.0" y="0.0"/>
            </bpmndi:BPMNLabel>
          </bpmndi:BPMNShape>
          <bpmndi:BPMNShape bpmnElement="mutipathDevParallelGateway" id="Shape-mutipathDevParallelGateway">
            <omgdc:Bounds height="32.0" width="32.0" x="330.0" y="225.0"/>
            <bpmndi:BPMNLabel>
              <omgdc:Bounds height="32.0" width="32.0" x="0.0" y="0.0"/>
            </bpmndi:BPMNLabel>
          </bpmndi:BPMNShape>
          <bpmndi:BPMNShape bpmnElement="webDev" id="Shape-webDev">
            <omgdc:Bounds height="55.0" width="85.0" x="190.0" y="345.0"/>
            <bpmndi:BPMNLabel>
              <omgdc:Bounds height="55.0" width="85.0" x="0.0" y="0.0"/>
            </bpmndi:BPMNLabel>
          </bpmndi:BPMNShape>
          <bpmndi:BPMNShape bpmnElement="serverDev" id="Shape-serverDev">
            <omgdc:Bounds height="55.0" width="85.0" x="315.0" y="345.0"/>
            <bpmndi:BPMNLabel>
              <omgdc:Bounds height="55.0" width="85.0" x="0.0" y="0.0"/>
            </bpmndi:BPMNLabel>
          </bpmndi:BPMNShape>
          <bpmndi:BPMNShape bpmnElement="mobileDev" id="Shape-mobileDev">
            <omgdc:Bounds height="55.0" width="85.0" x="430.0" y="345.0"/>
            <bpmndi:BPMNLabel>
              <omgdc:Bounds height="55.0" width="85.0" x="0.0" y="0.0"/>
            </bpmndi:BPMNLabel>
          </bpmndi:BPMNShape>
          <bpmndi:BPMNShape bpmnElement="endevent1" id="Shape-endevent1">
            <omgdc:Bounds height="32.0" width="32.0" x="340.0" y="465.0"/>
            <bpmndi:BPMNLabel>
              <omgdc:Bounds height="32.0" width="32.0" x="0.0" y="0.0"/>
            </bpmndi:BPMNLabel>
          </bpmndi:BPMNShape>
          <bpmndi:BPMNEdge bpmnElement="_2" id="BPMNEdge__2" sourceElement="mutipathDevParallelGateway" targetElement="mobileDev">
            <omgdi:waypoint x="362.0" y="241.0"/>
            <omgdi:waypoint x="470.0" y="315.0"/>
            <omgdi:waypoint x="470.0" y="345.0"/>
            <bpmndi:BPMNLabel>
              <omgdc:Bounds height="0.0" width="0.0" x="0.0" y="0.0"/>
            </bpmndi:BPMNLabel>
          </bpmndi:BPMNEdge>
          <bpmndi:BPMNEdge bpmnElement="_3" id="BPMNEdge__3" sourceElement="webDev" targetElement="endevent1">
            <omgdi:waypoint x="230.0" y="400.0"/>
            <omgdi:waypoint x="230.0" y="440.0"/>
            <omgdi:waypoint x="340.0" y="481.0"/>
            <bpmndi:BPMNLabel>
              <omgdc:Bounds height="0.0" width="0.0" x="0.0" y="0.0"/>
            </bpmndi:BPMNLabel>
          </bpmndi:BPMNEdge>
          <bpmndi:BPMNEdge bpmnElement="_4" id="BPMNEdge__4" sourceElement="serverDev" targetElement="endevent1">
            <omgdi:waypoint x="356.0" y="400.0"/>
            <omgdi:waypoint x="356.0" y="465.0"/>
            <bpmndi:BPMNLabel>
              <omgdc:Bounds height="0.0" width="0.0" x="0.0" y="0.0"/>
            </bpmndi:BPMNLabel>
          </bpmndi:BPMNEdge>
          <bpmndi:BPMNEdge bpmnElement="_5" id="BPMNEdge__5" sourceElement="mobileDev" targetElement="endevent1">
            <omgdi:waypoint x="475.0" y="400.0"/>
            <omgdi:waypoint x="475.0" y="425.0"/>
            <omgdi:waypoint x="372.0" y="481.0"/>
            <bpmndi:BPMNLabel>
              <omgdc:Bounds height="0.0" width="0.0" x="0.0" y="0.0"/>
            </bpmndi:BPMNLabel>
          </bpmndi:BPMNEdge>
          <bpmndi:BPMNEdge bpmnElement="_8" id="BPMNEdge__8" sourceElement="startevent1" targetElement="startDev">
            <omgdi:waypoint x="341.0" y="62.0"/>
            <omgdi:waypoint x="341.0" y="135.0"/>
            <bpmndi:BPMNLabel>
              <omgdc:Bounds height="0.0" width="0.0" x="0.0" y="0.0"/>
            </bpmndi:BPMNLabel>
          </bpmndi:BPMNEdge>
          <bpmndi:BPMNEdge bpmnElement="_9" id="BPMNEdge__9" sourceElement="startDev" targetElement="mutipathDevParallelGateway">
            <omgdi:waypoint x="346.0" y="190.0"/>
            <omgdi:waypoint x="346.0" y="225.0"/>
            <bpmndi:BPMNLabel>
              <omgdc:Bounds height="0.0" width="0.0" x="0.0" y="0.0"/>
            </bpmndi:BPMNLabel>
          </bpmndi:BPMNEdge>
          <bpmndi:BPMNEdge bpmnElement="_11" id="BPMNEdge__11" sourceElement="mutipathDevParallelGateway" targetElement="serverDev">
            <omgdi:waypoint x="346.0" y="257.0"/>
            <omgdi:waypoint x="346.0" y="345.0"/>
            <bpmndi:BPMNLabel>
              <omgdc:Bounds height="0.0" width="0.0" x="0.0" y="0.0"/>
            </bpmndi:BPMNLabel>
          </bpmndi:BPMNEdge>
          <bpmndi:BPMNEdge bpmnElement="_10" id="BPMNEdge__10" sourceElement="mutipathDevParallelGateway" targetElement="webDev">
            <omgdi:waypoint x="330.0" y="241.0"/>
            <omgdi:waypoint x="230.0" y="310.0"/>
            <omgdi:waypoint x="230.0" y="345.0"/>
            <bpmndi:BPMNLabel>
              <omgdc:Bounds height="0.0" width="0.0" x="0.0" y="0.0"/>
            </bpmndi:BPMNLabel>
          </bpmndi:BPMNEdge>
        </bpmndi:BPMNPlane>
      </bpmndi:BPMNDiagram>
    </definitions>

## 2.2 代码演示 ##

**1. 创建流程引擎**

private ProcessEngine getProcessEngine() { 
        ProcessEngineConfiguration configuration = ProcessEngineConfiguration.createStandaloneProcessEngineConfiguration();
        Properties properties = new Properties();
        try { 
            properties = Resource.getClasspathProperties("activity.properties");
            log.info("====================开始打印工作流配置=====================");
            properties.forEach((key, value) -> System.out.println(key + "=" + value));
        } catch (IOException e) { 
            e.printStackTrace();
        }
        configuration.setJdbcDriver(Resource.getProperty(properties, "activity.datasource.driver"));
        configuration.setJdbcUrl(Resource.getProperty(properties, "activity.datasource.url"));
        configuration.setJdbcUsername(Resource.getProperty(properties, "activity.datasource.username"));
        configuration.setJdbcPassword(Resource.getProperty(properties, "activity.datasource.password"));
        configuration.setDatabaseSchemaUpdate(Resource.getProperty(properties, "activity.databaseSchemaUpdate"));
        return configuration.buildProcessEngine();
    }

**2. 部署流程**

@Test
    public void deployProcess() { 
        DeploymentBuilder deploymentBuilder = getProcessEngine().getRepositoryService().createDeployment();
        deploymentBuilder.addClasspathResource("DevelopWebsite.bpmn");
        Deployment deploy = deploymentBuilder.deploy();
        System.out.println(StringUtil.format("============= 部署的流程ID为：{}=============", deploy.getId()));
    }

**3. 根据流程部署ID查询流程定义ID**

@Test
    public void queryProcessDefinition() { 
        String deployId = "1";
        ProcessDefinitionQuery query = getProcessEngine().getRepositoryService().createProcessDefinitionQuery();
        query.deploymentId(deployId);
        query.list().forEach(item -> System.out.println(StringUtil.format("============ 流程定义ID为：{} ============", item.getId())));
    }

**4. 根据流程定义ID启动流程**

/** * @description: 根据流程定义ID启动流程，涉及到两张表： * 1. act_ru_execution-记录未执行的进程记录，包含任务、gateway的执行，就像是指令。 * 2. act_ru_task：记录未执行的任务 * @author: yulin.chen * @date: 2020/9/17 17:19 */
    @Test
    public void startProcessByProcessDefinitionId() { 
        String processDefinitionId = "devWebsite:1:4";
        ProcessInstance instance = getProcessEngine().getRuntimeService().startProcessInstanceById(processDefinitionId);
        System.out.println(StringUtil.format("============ 启动的实例ID为：{} ============", instance.getId()));
    }

**5. 根据流程实例ID查询当前执行中的任务**

@Test
    public void queryRuntimeTasksByProcessInstanceId() { 
        String processInstanceId = "2501";
        TaskQuery query = getProcessEngine().getTaskService().createTaskQuery();
        //根据流程实例id查询
        query.processInstanceId(processInstanceId);
        //任务执行时间排序
        query.orderByTaskCreateTime().desc();
        query.list().forEach(item -> System.out.println(StringUtil.format("============ 正在执行的任务ID为：{}，任务名：{} ============",
                item.getId(), item.getName())));
    
    }

**6. 根据任务ID完成任务**

@Test
    public void execuTask() { 
        String taskId = "2504";
        getProcessEngine().getTaskService().complete(taskId);
    }

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3F3cXczMzMzMzMz_size_16_color_FFFFFF_t_70_pic_left]: /images/20221123/4e0df069e2f84dc5b5b133fa1faaf3b4.png
[Activity]: https://blog.csdn.net/qq_39459412/article/details/80427236
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3F3cXczMzMzMzMz_size_16_color_FFFFFF_t_70_pic_center]: /images/20221123/ca3eda749428417db8eb24f750694688.png