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Acitivi 入门Demo

Acitivi 入门Demo

作者: IT蚁人 | 来源:发表于2016-12-06 09:35 被阅读0次

    Activiti Demo

    BPMN

    BPMN(Business Process Modeling Notation)是一个重要的工作流建模语言的规范。它利用标准的图元去描述真实的业务发生过程,保证相同的流程在不同的流程引擎得到的执行结果一致。

    本demo中业务流程:用户发起请假,然后经理审批,如果请假时间比较短,请假完成,流程结束;如果请假超过3天,转给总经理审批,然后才能请假完成。

    用到的BPMN图

    业务流程图

    activiti配置

        <dependency>
          <groupId>org.activiti</groupId>
          <artifactId>activiti-engine</artifactId>
          <version>${activiti-version}</version>
        </dependency>
        <dependency>
          <groupId>org.activiti</groupId>
          <artifactId>activiti-spring</artifactId>
          <version>${activiti-version}</version>
        </dependency>
    

    创建数据库

    本demo在本地运行,首先需要在本地数据库创建schema(此处为activiti-demo)。
    然后运行以下代码,创建activiti引擎需要的25张表(acitivti提供了创建这些表需要的sql,也可以手动创建)

            ProcessEngineConfiguration processEngineConfiguration = ProcessEngineConfiguration.createStandaloneProcessEngineConfiguration();
    
            processEngineConfiguration.setJdbcDriver("com.mysql.jdbc.Driver");
            processEngineConfiguration.setJdbcUrl("jdbc:mysql://localhost:3306/activiti-demo?useUnicode=true&characterEncoding=utf8");
            processEngineConfiguration.setJdbcUsername("root");
            processEngineConfiguration.setJdbcPassword("root");
    
            processEngineConfiguration.setDatabaseSchemaUpdate(ProcessEngineConfiguration.DB_SCHEMA_UPDATE_TRUE);
            ProcessEngine processEngine = processEngineConfiguration.buildProcessEngine();
            System.out.println("processEngine"+processEngine);
    

    部署一个工作流程

    
        ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();
    
        @Test
        public void startDeployment(){
            Deployment deployment = processEngine.getRepositoryService()
                    .createDeployment()
                    .addClasspathResource("diagrams/VariableUsersDemo.bpmn")
                    .addClasspathResource("diagrams/VariableUsersDemo.png")
                    .deploy();
            System.out.println("Deploy deploy ID: " + deployment.getId());
    
    
        }
        
    

    png文件可以不添加,只是用作用户查看流程。

    开始一个流程实例

            public void startProcessInstance(){
    
            String deployKey = "variableProcess";
    
            Map<String,Object> variables = new HashMap<>();
    
            variables.put("user","jianke");
            variables.put("manager","caohao");
            variables.put("boss","zhangqi");
    
            RuntimeService runtimeService = processEngine.getRuntimeService();
            ProcessInstance processInstance = runtimeService.startProcessInstanceByKey(deployKey, variables);
             String processInstanceID = processInstance.getId();
            System.out.println("流程实例ID: " + processInstanceID);
    
    
    
        }
    

    variables保存一些该流程需要的变量,此处用来保存了一些人员信息,即何人发起,需要何人进行审批。
    user,manager,boss这些字段是在流程图中设置的。


    BPMN中设置人员信息

    给该实例附加请假信息

            TaskService service = processEngine.getTaskService();
            List<Task> list = service.createTaskQuery().processInstanceId(processInstanceID).taskCandidateUser("jianke")
                    .list();
            for(Task task:list){
                System.out.println("Task ID : " + task.getId() + "   " + task.getName());
                service.claim(task.getId(),"jianke"); //确定请假任务
                Leave leave = new Leave();
                leave.setName("jianke");
                leave.setContent("Go to Sleep");
                leave.setCreateTime(new Date());
                leave.setDays(5);
                service.setVariable(task.getId(), "info", leave); //添加请假信息
                service.complete(task.getId()); //完成请假,提交审批
            }
    

    经理审批

            List<Task> list = service.createTaskQuery().processInstanceId(processInstanceID).taskCandidateUser("caohao")
                    .list();   //搜索等待主管处理的任务
            for(Task task:list){
                System.out.println("Task ID : " + task.getId() + "   " + task.getName());
                service.claim(task.getId(), "caohao"); //主管接受任务
                Leave leave = (Leave)service.getVariable(task.getId(),"info");
    
                Map<String,Object> object = new HashMap<>();
                object.put("days", leave.getDays());
                service.complete(task.getId(), object);  //主管审批,并附带请假天数信息,交给引擎处理是否需要总经理审批
                System.out.println("complete!");
            }
    

    在BPMN中添加是否总经理审批的判断:


    BPMN中添加判断逻辑

    总经理审批

                //操作流程同经理审批
            TaskService service = processEngine.getTaskService();
            List<Task> list = service.createTaskQuery().processInstanceId(processInstanceID).taskCandidateUser("zhangqi")
                    .list();
            for(Task task:list){
                System.out.println("Task ID : " + task.getId() + "   " + task.getName());
                service.claim(task.getId(), "zhangqi");
                
                  service.complete(task.getId());
                System.out.println("complete!");
            }
    

    请假流程完成通知

    public class endListener implements ExecutionListener {
    
        @Override
        public void notify(DelegateExecution delegateTask){
             //在此处进行请假完成后的操作,比较通知请假人,记录档案等
             
             
            System.out.println("Task End!");
        }
    
    }
    

    给结束节点添加通知的方法,在BPMN图中添加:


    BPMN中添加通知

    附上原码地址,大家一起学习探讨:
    https://github.com/qixiaojian/activiti-demo.git

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