Activity工作流开发简单介绍

1. 工作流表

在这里插入图片描述
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

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）。
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。
act_id_*: 'id’表示identity。这些表包含身份信息，比如用户，组等等。
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。
act_ge_*: 通用数据，用于不同场景下。
参考：Activity工作流入门

重点介绍下一下几张表

act_ge_bytearray：保存的工作流.bpmn以及对应的图片.png二进制文件
act_re_deployment：保存部署
act_re_procdef：保存部署的流程
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
act_ru_task：保存等待执行的任务
act_ru_variable：保存任务执行时定义的量
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
act_hi_procinst：保存部署的流程的历史
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
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);
}

只有把命运掌握在自己手中，从今天起开始努力，即使暂时看不到希望，也要相信自己。因为比你牛几倍的人，依然在努力。

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原文地址：https://www.cnblogs.com/freesky168/p/14358159.html