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

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