关耳er  

排他网关

1、什么是排他网关

  排他网关(也叫异或(XOR)网关,或叫基于数据的排他网关),用来在流程中实现决策。 当流程执行到这个网关,所有分支都会判断条件是否为true,如果为 true 则执行该分支,

  注意,排他网关只会选择一个为 true 的分支执行。(即使有两个分支条件都为 true,排他网关也会只选择一条分支去执行)

不使用排他网关也可以实现分支:

    

  上图中,在连线的condition条件上设置分支条件;

  缺点:如果条件都不满足,不使用排他网关,流程就结束了(是异常结束);

  如果使用排他网关决定分支的走向:

    

  如果从网关出去的线所有条件都不满足则系统抛出org.activiti.engine.ActivitiException异常;

  说明:经过排他网关必须要有一条且只有一条分支走;

2、流程定义

  

3、部署流程

package com.zn;

import com.zn.entity.Holiday;
import org.activiti.engine.ProcessEngine;
import org.activiti.engine.ProcessEngines;
import org.activiti.engine.RepositoryService;
import org.activiti.engine.RuntimeService;
import org.activiti.engine.repository.Deployment;
import org.activiti.engine.runtime.ProcessInstance;
import org.junit.Test;

import java.util.HashMap;
import java.util.Map;

public class ActivitiExclusiveGateway {
    /**
     * 流程部署
     */
    @Test
    public void deployment() {
        //获取ProcessEngine对象   默认配置文件名称:activiti.cfg.xml  并且configuration的Bean实例ID为processEngineConfiguration
        ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();
        //获取RepositoryService对象进行流程部署
        RepositoryService repositoryService = processEngine.getRepositoryService();
        //进行部署,将对应的流程定义文件生成到数据库当中,作为记录进行保存
        Deployment deployment = repositoryService.createDeployment()
                .addClasspathResource("bmpnfiles/holidayExclusiveGateway.bpmn")     //加载流程文件
                .name("请假流程-网关")       //设置流程名称
                .key("holiday")
                .deploy();                      //部署

        //输出部署信息
        System.out.println("流程名称:" + deployment.getName());
        System.out.println("流程ID:" + deployment.getId());
        System.out.println("流程Key:" + deployment.getKey());
    }
}

4、启动流程实例

package com.zn;

import com.zn.entity.Holiday;
import org.activiti.engine.ProcessEngine;
import org.activiti.engine.ProcessEngines;
import org.activiti.engine.RepositoryService;
import org.activiti.engine.RuntimeService;
import org.activiti.engine.repository.Deployment;
import org.activiti.engine.runtime.ProcessInstance;
import org.junit.Test;

import java.util.HashMap;
import java.util.Map;

public class ActivitiExclusiveGateway {

    /**
     * 启动流程实例
     */
    @Test
    public void getInstance() {
        //获取ProcessEngine对象   默认配置文件名称:activiti.cfg.xml  并且configuration的Bean实例ID为processEngineConfiguration
        ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();
        //获取RuntimeService
        RuntimeService runtimeService = processEngine.getRuntimeService();
        //设置流程变量  启动流程时设置
        Holiday holiday=new Holiday();
        holiday.setNum(3);
        //定义一个map集合,存放assignee的值
        Map<String ,Object> assMap=new HashMap<>();
        assMap.put("holiday",holiday);
        //启动一个流程实例
        ProcessInstance processInstance = runtimeService.startProcessInstanceByKey("holidayWay", assMap);
        System.out.println("流程启动成功~");
    }

}

数据库:

  

5、任务处理

package com.zn;

import com.zn.entity.Holiday;
import org.activiti.engine.*;
import org.activiti.engine.repository.Deployment;
import org.activiti.engine.runtime.ProcessInstance;
import org.activiti.engine.task.Task;
import org.junit.Test;

import java.util.HashMap;
import java.util.Map;

public class ActivitiExclusiveGateway {

    /*
     *任务处理
     */
    @Test
    public void completeTask(){
        //获取ProcessEngine
        ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();
        //获取TaskService对象
        TaskService taskService = processEngine.getTaskService();
        //查询到自己的任务,然后通过任务ID进行提交
        Task task = taskService.createTaskQuery().processDefinitionKey("holidayWay").taskAssignee("zhangsan").singleResult();
        //任务处理
        taskService.complete(task.getId());
    }
    
}

数据库:

  

6、任务处理

package com.zn;

import com.zn.entity.Holiday;
import org.activiti.engine.*;
import org.activiti.engine.repository.Deployment;
import org.activiti.engine.runtime.ProcessInstance;
import org.activiti.engine.task.Task;
import org.junit.Test;

import java.util.HashMap;
import java.util.Map;

public class ActivitiExclusiveGateway {

    /*
     *任务处理
     */
    @Test
    public void completeTask(){
        //获取ProcessEngine
        ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();
        //获取TaskService对象
        TaskService taskService = processEngine.getTaskService();
        //查询到自己的任务,然后通过任务ID进行提交
        Task task = taskService.createTaskQuery().processDefinitionKey("holidayWay").taskAssignee("lisi").singleResult();
        //任务处理
        taskService.complete(task.getId());
    }


}

数据库:

  

 

posted on 2020-04-07 16:03  关耳er  阅读(1073)  评论(0编辑  收藏  举报