Activiti 接收任务活动

　　流程中往往需要特定人接受任务并进行一定操作才能继续进行下去。

　　代码如下

import java.io.InputStream;

import org.activiti.engine.ProcessEngine;
import org.activiti.engine.ProcessEngines;
import org.activiti.engine.repository.Deployment;
import org.activiti.engine.runtime.Execution;
import org.activiti.engine.runtime.ProcessInstance;
import org.junit.Test;
    public class ReceiveTaskTest {

        ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();

        /**部署流程定义（从inputStream）*/
        @Test
        public void deploymentProcessDefinition_inputStream(){
            InputStream inputStreamBpmn = this.getClass().getResourceAsStream("receiveTask.bpmn");
            InputStream inputStreamPng = this.getClass().getResourceAsStream("receiveTask.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("接收活动任务")//添加部署的名称
                            .addInputStream("receiveTask.bpmn", inputStreamBpmn)//
                            .addInputStream("receiveTask.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+设置流程变量+获取流程变量+向后执行一步*/
        @Test
        public void startProcessInstance(){
            //流程定义的key
            String processDefinitionKey = "receiveTask";
            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

            /**查询执行对象ID*/
            Execution execution1 = processEngine.getRuntimeService()//
                            .createExecutionQuery()//创建执行对象查询
                            .processInstanceId(pi.getId())//使用流程实例ID查询
                            .activityId("receivetask1")//当前活动的id，对应receiveTask.bpmn文件中的活动节点id的属性值
                            .singleResult();

            /**使用流程变量设置当日销售额**/
            processEngine.getRuntimeService().setVariable(execution1.getId(), "汇总当日销售额", 21000);

            /**向后执行一步，如果流程处于等待状态，使得流程继续执行*/
            processEngine.getRuntimeService()
                            .signal(execution1.getId());
            /**查询执行对象ID*/
            Execution execution2 = processEngine.getRuntimeService()//
                            .createExecutionQuery()//创建执行对象查询
                            .processInstanceId(pi.getId())//使用流程实例ID查询
                            .activityId("receivetask2")//当前活动的id，对应receiveTask.bpmn文件中的活动节点id的属性值
                            .singleResult();
            /**从流程变量中获取汇总当日销售额的值*/
            Integer value = (Integer)processEngine.getRuntimeService()//
                            .getVariable(execution2.getId(), "汇总当日销售额");
            System.out.println("给老板发送短信：金额是："+value);
            /**向后执行一步，如果流程处于等待状态，使得流程继续执行*/
            processEngine.getRuntimeService()
                            .signal(execution2.getId());
        }
    }

　　由于没有任务id，因此只能由流程进行操作，所以使用getRuntimeService()方法。先由流程实例编号查询流程1，并进行汇总销售操作然后进行到下一个流程。同样，由流程实例编号查询流程2，汇报给老板并进行到下一步完成整个流程

　　bpnm文件如下

<?xml version="1.0" encoding="UTF-8"?>
<definitions xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:activiti="http://activiti.org/bpmn" xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI" xmlns:omgdc="http://www.omg.org/spec/DD/20100524/DC" xmlns:omgdi="http://www.omg.org/spec/DD/20100524/DI" typeLanguage="http://www.w3.org/2001/XMLSchema" expressionLanguage="http://www.w3.org/1999/XPath" targetNamespace="http://www.activiti.org/test">
  <process id="receiveTask" name="receiveTaskProcess" isExecutable="true">
    <startEvent id="startevent1" name="Start"></startEvent>
    <receiveTask id="receivetask1" name="汇总当日销售额"></receiveTask>
    <receiveTask id="receivetask2" name="给老板发送信息"></receiveTask>
    <endEvent id="endevent1" name="End"></endEvent>
    <sequenceFlow id="flow1" sourceRef="receivetask2" targetRef="endevent1"></sequenceFlow>
    <sequenceFlow id="flow2" sourceRef="startevent1" targetRef="receivetask1"></sequenceFlow>
    <sequenceFlow id="flow3" sourceRef="receivetask1" targetRef="receivetask2"></sequenceFlow>
  </process>
  <bpmndi:BPMNDiagram id="BPMNDiagram_receiveTask">
    <bpmndi:BPMNPlane bpmnElement="receiveTask" id="BPMNPlane_receiveTask">
      <bpmndi:BPMNShape bpmnElement="startevent1" id="BPMNShape_startevent1">
        <omgdc:Bounds height="35.0" width="35.0" x="360.0" y="20.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="receivetask1" id="BPMNShape_receivetask1">
        <omgdc:Bounds height="55.0" width="105.0" x="325.0" y="120.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="receivetask2" id="BPMNShape_receivetask2">
        <omgdc:Bounds height="55.0" width="105.0" x="325.0" y="250.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="endevent1" id="BPMNShape_endevent1">
        <omgdc:Bounds height="35.0" width="35.0" x="360.0" y="360.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNEdge bpmnElement="flow1" id="BPMNEdge_flow1">
        <omgdi:waypoint x="377.0" y="305.0"></omgdi:waypoint>
        <omgdi:waypoint x="377.0" y="360.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow2" id="BPMNEdge_flow2">
        <omgdi:waypoint x="377.0" y="55.0"></omgdi:waypoint>
        <omgdi:waypoint x="377.0" y="120.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow3" id="BPMNEdge_flow3">
        <omgdi:waypoint x="377.0" y="175.0"></omgdi:waypoint>
        <omgdi:waypoint x="377.0" y="250.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
    </bpmndi:BPMNPlane>
  </bpmndi:BPMNDiagram>
</definitions>