Activiti的架构说明

最新推荐文章于 2024-08-12 13:09:35 发布

李文璺

最新推荐文章于 2024-08-12 13:09:35 发布

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分类专栏： activiti

本文链接：https://blog.youkuaiyun.com/liwwnwen/article/details/98342792

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本文详细介绍Activiti流程引擎的使用，包括配置加载、流程定义、部署、实例启动、任务查看及完成等关键步骤，通过具体代码示例展示了如何在Java环境中操作Activiti。

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1. ProcessEngineConfiguration类,主要加载activiti.cfg.xml配置文件
2. ProcessEngine类 帮我们快速得到各个service接口,并且可以生成activiti的工作环境 25张表生成
3. Service接口: 作用快速实现数据库25张表的操作
                1.RepositorySercice
                2.RuntimeService
                3.TaskService
                4.HistoryService
 4.BPMN的ActivitiDesigener插件 IDEA工具中安装 ActivitiDesigener的注意细节
 5.画出流程定义图
 6.部署流程定义
  方式一: 单个文件(bpmn文件,png文件)
//流程定义部署
    public static void main(String[] args) {
        ProcessEngine pProcessEngine = ProcessEngines.getDefaultProcessEngine();
        //2.得到RepositoryService实例
        RepositoryService repositoryService = pProcessEngine.getRepositoryService();
        //3.进行部署
        Deployment deployment = repositoryService.createDeployment()
                .addClasspathResource("diagram/holiday.bpmn")//添加bpmn资源
                .addClasspathResource("diagram/holiday.png")//添加图片文件
                .name("请假流程")
                .deploy();
        //4.输出部署信息
        System.out.println(deployment.getName());
        System.out.println(deployment.getId());
    }

方式二:先将bmpn文件,png文件压缩成zip文件,但是activiti最终也是以单个文件形式保存,说明activiti进行了解压工作
/Zip流程化部署
    public static void main(String[] args) {
        ProcessEngine pProcessEngine = ProcessEngines.getDefaultProcessEngine();
        //2.得到RepositoryService实例
        RepositoryService repositoryService = pProcessEngine.getRepositoryService();
        //3.转化出zipInputStream流对象
        InputStream resourceAsStream = ActivitiDeployment.class.getClassLoader().getResourceAsStream("diagram/holiday.zip");

        ZipInputStream zipInputStream = new ZipInputStream(resourceAsStream);

        //4.进行部署
        Deployment deployment = repositoryService.createDeployment()
                .addZipInputStream(zipInputStream)
                //.addClasspathResource("diagram/holiday.bpmn")//添加bpmn资源
                //.addClasspathResource("diagram/holiday.png")//添加图片文件
                .name("请假流程")
                .deploy();

        //5.输出部署信息
        System.out.println(deployment.getName());
        System.out.println(deployment.getId());
    }

7. 启动流程实例
 public static void main(String[] args) {
        //1.得到ProcessEngine对象
        ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();
        //2.得到RunService对象
        RuntimeService runtimeService = processEngine.getRuntimeService();
        //3.创建流程实例
        ProcessInstance processInstance = runtimeService.startProcessInstanceByKey("holiday");
        //4.输出实例相关对象
        System.out.println("流程部署ID" + processInstance.getDeploymentId());
        System.out.println("流程实例ID" + processInstance.getId());
        System.out.println("活动ID" + processInstance.getActivityId());
    }
   8.查看任务
   public static void main(String[] args) {
        //1.得到ProcessEngine对象
        ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();
        //2.TaskService

        TaskService taskService = processEngine.getTaskService();

        //3.流程定义key,负责人assignee来实现人物列表查询
        List<Task> taskList = taskService.createTaskQuery()
                .processDefinitionKey("holiday")
                .taskAssignee("张三")
                .list();

        //4.任务列表展示
        for (Task task : taskList) {
            System.out.println("流程实例ID:" + task.getProcessInstanceId());
            System.out.println("任务ID:" + task.getId());
            System.out.println("任务负责人:" + task.getAssignee());
            System.out.println("任务名称:" + task.getName());
        }
    }
    9. 完成任务
      //张三
    public static void main(String[] args) {
        //1.得到ProcessEngine对象
        ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();
        //2.TaskService

        TaskService taskService = processEngine.getTaskService();

        //3.处理任务,结合当前任务查询操作,任务ID:7505
        taskService.complete("7505");

    } 
    10. 查看和完成任务(8.9一起执行)
    //张三
    public static void main(String[] args) {
        //1.得到ProcessEngine对象
        ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();
        //2.TaskService

        TaskService taskService = processEngine.getTaskService();

        //3.流程定义key,负责人assignee来实现人物列表查询
        List<Task> taskList = taskService.createTaskQuery()
                .processDefinitionKey("holiday")
                .taskAssignee("张三")
                .list();

        for (Task task : taskList) {
            //3.处理任务,结合当前任务查询操作,任务ID:10002
            taskService.complete(task.getId());
        }
    }