Activiti 学习笔记十：开始活动节点（判断流程是否结束及查询历史）

一、流程图

二、演示代码

package jiankunking.start;

import java.io.InputStream;

import org.activiti.engine.ProcessEngine;
import org.activiti.engine.ProcessEngines;
import org.activiti.engine.history.HistoricProcessInstance;
import org.activiti.engine.repository.Deployment;
import org.activiti.engine.runtime.ProcessInstance;
import org.junit.Test;

public class StartTest

    ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();

    /**部署流程定义（从inputStream）*/
    @Test
    public void deploymentProcessDefinition_inputStream(){
        InputStream inputStreamBpmn = this.getClass().getResourceAsStream("start.bpmn");
        InputStream inputStreamPng = this.getClass().getResourceAsStream("start.png");
        Deployment deployment = processEngine.getRepositoryService()//与流程定义和部署对象相关的Service
                        .createDeployment()//创建一个部署对象
                        .name("开始活动")//添加部署的名称
                        .addInputStream("start.bpmn", inputStreamBpmn)//
                        .addInputStream("start.png", inputStreamPng)//
                        .deploy();//完成部署
        System.out.println("部署ID："+deployment.getId());//
        System.out.println("部署名称："+deployment.getName());//
    }

    /**启动流程实例+判断流程是否结束+查询历史*/
    @Test
    public void startProcessInstance(){
        //流程定义的key
        String processDefinitionKey = "start";
        ProcessInstance pi = processEngine.getRuntimeService()//与正在执行的流程实例和执行对象相关的Service
                        .startProcessInstanceByKey(processDefinitionKey);//使用流程定义的key启动流程实例，key对应helloworld.bpmn文件中id的属性值，使用key值启动，默认是按照最新版本的流程定义启动
        System.out.println("流程实例ID:"+pi.getId());//流程实例ID    101
        System.out.println("流程定义ID:"+pi.getProcessDefinitionId());//流程定义ID   helloworld:1:4

        /**判断流程是否结束，查询正在执行的执行对象表*/
        ProcessInstance rpi = processEngine.getRuntimeService()//
                        .createProcessInstanceQuery()//创建流程实例查询对象
                        .processInstanceId(pi.getId())
                        .singleResult();
        //说明流程实例结束了
        if(rpi==null){
            /**查询历史，获取流程的相关信息*/
            HistoricProcessInstance hpi = processEngine.getHistoryService()//
                        .createHistoricProcessInstanceQuery()//
                        .processInstanceId(pi.getId())//使用流程实例ID查询
                        .singleResult();
            System.out.println(hpi.getId()+"    "+hpi.getStartTime()+"   "+hpi.getEndTime()+"   "+hpi.getDurationInMillis());
        }
    }


}      

三、小结