【应用篇】Activiti监听与业务颗粒结合的简单应用（三）
Activiti的简单应用，应用监听来实现简单的业务颗粒与工作流程结合，让流程带动业务颗粒执行的过程，此次的流程图应用多分支结构，并将流程中的判断值设为参数，由前台传递过去。
新建普通java类：
package com.tgb.itoo.activiti.controller;
public class xs {
public static void SayHello(){
System.out.println("88xvshu");
}
}
新建activiti监听类：
package com.tgb.itoo.activiti.controller;
import org.activiti.engine.delegate.DelegateTask;
import org.activiti.engine.delegate.TaskListener;
public class xvshuDelegate implements TaskListener{
/**
*
*/
private static final long serialVersionUID = 1L;
@Override
public void notify(DelegateTask delegateTask) {
xs.SayHello();
}
}
类似的Java类和监听类需要再创建3个
业务流程图 如图：
流程变量的属性设置（jingyuan-${result==flowjingyuan}，milaoshi-${result==flowmilaoshi}） 如图：
最终生成的配置文件 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:xsd="http://www.w3.org/2001/XMLSchema" 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="myProcess" name="My process" isExecutable="true">
<startEvent id="startevent1" name="Start"></startEvent>
<userTask id="xvshu" name="xvshu">
<extensionElements>
<activiti:taskListener event="create" class="com.tgb.itoo.activiti.controller.xvshuDelegate"></activiti:taskListener>
</extensionElements>
</userTask>
<sequenceFlow id="flow1" sourceRef="startevent1" targetRef="xvshu"></sequenceFlow>
<userTask id="jingyuan" name="jingyuan">
<extensionElements>
<activiti:taskListener event="create" class="com.tgb.itoo.activiti.controller.jingyuanDelegate"></activiti:taskListener>
</extensionElements>
</userTask>
<userTask id="usertask1" name="guhaiyan">
<extensionElements>
<activiti:taskListener event="create" class="com.tgb.itoo.activiti.controller.guhaiyanDelegate"></activiti:taskListener>
</extensionElements>
</userTask>
<endEvent id="endevent1" name="End"></endEvent>
<sequenceFlow id="flow4" sourceRef="usertask1" targetRef="endevent1"></sequenceFlow>
<exclusiveGateway id="exclusivegateway1" name="Exclusive Gateway"></exclusiveGateway>
<sequenceFlow id="flow5" sourceRef="xvshu" targetRef="exclusivegateway1"></sequenceFlow>
<sequenceFlow id="flow6" name="jingyuan" sourceRef="exclusivegateway1" targetRef="jingyuan">
<conditionExpression xsi:type="tFormalExpression"><![CDATA[${result==flowjingyuan}]]></conditionExpression>
</sequenceFlow>
<userTask id="usertask2" name="guhaiyan">
<extensionElements>
<activiti:taskListener event="create" class="com.tgb.itoo.activiti.controller.guhaiyanDelegate"></activiti:taskListener>
</extensionElements>
</userTask>
<sequenceFlow id="flow13" name="guhaiyan" sourceRef="exclusivegateway1" targetRef="usertask2">
<conditionExpression xsi:type="tFormalExpression"><![CDATA[${result==flowhaiyan}]]></conditionExpression>
</sequenceFlow>
<userTask id="milaoshi" name="milaoshi" activiti:async="true">
<extensionElements>
<activiti:taskListener event="create" class="com.tgb.itoo.activiti.controller.milaoshiDelegate"></activiti:taskListener>
</extensionElements>
</userTask>
<sequenceFlow id="flow14" name="milaoshi" sourceRef="exclusivegateway1" targetRef="milaoshi">
<conditionExpression xsi:type="tFormalExpression"><![CDATA[${result==flowmilaoshi}]]></conditionExpression>
</sequenceFlow>
<sequenceFlow id="flow15" sourceRef="milaoshi" targetRef="endevent1"></sequenceFlow>
<sequenceFlow id="flow16" sourceRef="usertask2" targetRef="endevent1"></sequenceFlow>
<sequenceFlow id="flow17" name="guhaiyan" sourceRef="exclusivegateway2" targetRef="usertask1">
<conditionExpression xsi:type="tFormalExpression"><![CDATA[${result==flowhaiyan}]]></conditionExpression>
</sequenceFlow>
<sequenceFlow id="flow18" sourceRef="exclusivegateway2" targetRef="endevent1"></sequenceFlow>
<exclusiveGateway id="exclusivegateway2" name="Exclusive Gateway"></exclusiveGateway>
<sequenceFlow id="flow19" sourceRef="jingyuan" targetRef="exclusivegateway2"></sequenceFlow>
</process>
<bpmndi:BPMNDiagram id="BPMNDiagram_myProcess">
<bpmndi:BPMNPlane bpmnElement="myProcess" id="BPMNPlane_myProcess">
<bpmndi:BPMNShape bpmnElement="startevent1" id="BPMNShape_startevent1">
<omgdc:Bounds height="35.0" width="35.0" x="60.0" y="150.0"></omgdc:Bounds>
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="xvshu" id="BPMNShape_xvshu">
<omgdc:Bounds height="55.0" width="105.0" x="140.0" y="140.0"></omgdc:Bounds>
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="jingyuan" id="BPMNShape_jingyuan">
<omgdc:Bounds height="55.0" width="105.0" x="400.0" y="140.0"></omgdc:Bounds>
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="usertask1" id="BPMNShape_usertask1">
<omgdc:Bounds height="55.0" width="105.0" x="630.0" y="140.0"></omgdc:Bounds>
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="endevent1" id="BPMNShape_endevent1">
<omgdc:Bounds height="35.0" width="35.0" x="745.0" y="270.0"></omgdc:Bounds>
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="exclusivegateway1" id="BPMNShape_exclusivegateway1">
<omgdc:Bounds height="40.0" width="40.0" x="290.0" y="147.0"></omgdc:Bounds>
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="usertask2" id="BPMNShape_usertask2">
<omgdc:Bounds height="55.0" width="105.0" x="350.0" y="14.0"></omgdc:Bounds>
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="milaoshi" id="BPMNShape_milaoshi">
<omgdc:Bounds height="55.0" width="105.0" x="258.0" y="260.0"></omgdc:Bounds>
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="exclusivegateway2" id="BPMNShape_exclusivegateway2">
<omgdc:Bounds height="40.0" width="40.0" x="539.0" y="147.0"></omgdc:Bounds>
</bpmndi:BPMNShape>
<bpmndi:BPMNEdge bpmnElement="flow1" id="BPMNEdge_flow1">
<omgdi:waypoint x="95.0" y="167.0"></omgdi:waypoint>
<omgdi:waypoint x="140.0" y="167.0"></omgdi:waypoint>
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="flow4" id="BPMNEdge_flow4">
<omgdi:waypoint x="735.0" y="167.0"></omgdi:waypoint>
<omgdi:waypoint x="762.0" y="173.0"></omgdi:waypoint>
<omgdi:waypoint x="762.0" y="270.0"></omgdi:waypoint>
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="flow5" id="BPMNEdge_flow5">
<omgdi:waypoint x="245.0" y="167.0"></omgdi:waypoint>
<omgdi:waypoint x="290.0" y="167.0"></omgdi:waypoint>
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="flow6" id="BPMNEdge_flow6">
<omgdi:waypoint x="330.0" y="167.0"></omgdi:waypoint>
<omgdi:waypoint x="400.0" y="167.0"></omgdi:waypoint>
<bpmndi:BPMNLabel>
<omgdc:Bounds height="14.0" width="40.0" x="339.0" y="179.0"></omgdc:Bounds>
</bpmndi:BPMNLabel>
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="flow13" id="BPMNEdge_flow13">
<omgdi:waypoint x="310.0" y="147.0"></omgdi:waypoint>
<omgdi:waypoint x="310.0" y="41.0"></omgdi:waypoint>
<omgdi:waypoint x="350.0" y="41.0"></omgdi:waypoint>
<bpmndi:BPMNLabel>
<omgdc:Bounds height="14.0" width="44.0" x="310.0" y="91.0"></omgdc:Bounds>
</bpmndi:BPMNLabel>
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="flow14" id="BPMNEdge_flow14">
<omgdi:waypoint x="310.0" y="187.0"></omgdi:waypoint>
<omgdi:waypoint x="310.0" y="260.0"></omgdi:waypoint>
<bpmndi:BPMNLabel>
<omgdc:Bounds height="14.0" width="38.0" x="310.0" y="219.0"></omgdc:Bounds>
</bpmndi:BPMNLabel>
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="flow15" id="BPMNEdge_flow15">
<omgdi:waypoint x="363.0" y="287.0"></omgdi:waypoint>
<omgdi:waypoint x="745.0" y="287.0"></omgdi:waypoint>
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="flow16" id="BPMNEdge_flow16">
<omgdi:waypoint x="455.0" y="41.0"></omgdi:waypoint>
<omgdi:waypoint x="762.0" y="41.0"></omgdi:waypoint>
<omgdi:waypoint x="762.0" y="270.0"></omgdi:waypoint>
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="flow17" id="BPMNEdge_flow17">
<omgdi:waypoint x="579.0" y="167.0"></omgdi:waypoint>
<omgdi:waypoint x="630.0" y="167.0"></omgdi:waypoint>
<bpmndi:BPMNLabel>
<omgdc:Bounds height="14.0" width="100.0" x="578.0" y="150.0"></omgdc:Bounds>
</bpmndi:BPMNLabel>
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="flow18" id="BPMNEdge_flow18">
<omgdi:waypoint x="559.0" y="187.0"></omgdi:waypoint>
<omgdi:waypoint x="559.0" y="287.0"></omgdi:waypoint>
<omgdi:waypoint x="745.0" y="287.0"></omgdi:waypoint>
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="flow19" id="BPMNEdge_flow19">
<omgdi:waypoint x="505.0" y="167.0"></omgdi:waypoint>
<omgdi:waypoint x="539.0" y="167.0"></omgdi:waypoint>
</bpmndi:BPMNEdge>
</bpmndi:BPMNPlane>
</bpmndi:BPMNDiagram>
</definitions>
启动流程对应的代码：
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashMap;
import java.util.Map;
import org.activiti.engine.ProcessEngine;
import org.activiti.engine.ProcessEngineConfiguration;
import org.activiti.engine.RepositoryService;
import org.activiti.engine.RuntimeService;
import org.activiti.engine.TaskService;
import org.activiti.engine.runtime.ProcessInstance;
import org.activiti.engine.task.Task;
public class NameDemo {
private static String readDataFromConsole(String prompt) {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
String str = null;
try {
System.out.print(prompt);
str = br.readLine();
} catch (IOException e) {
e.printStackTrace();
}
return str;
}
public static void main(String[] args) {
String str = readDataFromConsole("Please input string：");
System.out.println("The information from console： " + str);
// 创建流程引擎
ProcessEngineConfiguration processEngineConfiguration = ProcessEngineConfiguration
.createStandaloneProcessEngineConfiguration();
// 连接数据库的配置
processEngineConfiguration.setJdbcDriver("com.mysql.jdbc.Driver");
processEngineConfiguration
.setJdbcUrl("jdbc:mysql://localhost:3306/activitiexam?useUnicode=true&characterEncoding=utf8");
processEngineConfiguration.setJdbcUsername("root");
processEngineConfiguration.setJdbcPassword("root");
ProcessEngine processEngine = processEngineConfiguration
.buildProcessEngine();
//使用Spring来管理工作流引擎的创建
/* ProcessEngine processEngine = ProcessEngineConfiguration
.createProcessEngineConfigurationFromResource("applicationContext-common.xml")
.buildProcessEngine(); */
System.out.println(processEngine);
// 获取流程存储服务组件
RepositoryService repositoryService = processEngine
.getRepositoryService();
// 获取运行时服务组件
RuntimeService runtimeService = processEngine.getRuntimeService();
// 获取流程任务组件
TaskService taskService = processEngine.getTaskService();
// 1、部署流程文件
repositoryService.createDeployment().name("MyProcess")
.addClasspathResource("diagrams/" + str + ".bpmn").deploy();
// 2、启动流程--根据key部署的话是默认找的最新版本
ProcessInstance processInstance = runtimeService
.startProcessInstanceByKey("myProcess");
String end="0";//processInstance.getId() != null
while (end.equalsIgnoreCase("0")) {
//循环查询任务
Task task = taskService.createTaskQuery()
.processInstanceId(processInstance.getId()).singleResult();
Map<String, Object> variables = new HashMap<String, Object>();
if(task==null){
end="1";
System.out.println("任务已经结束");
break;
}else{
str = readDataFromConsole("Please input result:");
String flowjingyuan=readDataFromConsole("Please input flowjingyuan:");
String flowhaiyan=readDataFromConsole("Please input flowhaiyan:");
String flowmilaoshi=readDataFromConsole("Please input flowmilaoshi:");
variables.put("result", str);
variables.put("flowjingyuan", flowjingyuan);
variables.put("flowhaiyan", flowhaiyan);
variables.put("flowmilaoshi", flowmilaoshi);
taskService.complete(task.getId(),variables); //完成任务
}
}
}
}
执行结果：
总结：
首先解释一下，现在在客户端存在的所有暂停其实在真实的开发中均是不存在的，此处只是为了传递变量，告诉工作流如何继续向下一个结点执行，在真实的开发业务中是不同的人处理不同的任务，每次的查询只查询自己的任务，只有本身自己的任务完成后工作流才会自动向下执行。
解释一下执行结果：
xvshu结点是在工作流启动后立即执行，但是在办理xvshu结点时需要输入下一个结点的参数，当输入的result==flowjingyuan时，则立即执行jingyuan结点，输出jingyuan88，办理jingyuan结点时也需要输入下一个结点的参数，当输入的内容result==flowhaiyan即立即执行haiyan结点，输出88guhaiyan，办理guhaiyan结点时，需要输入下一个结点的参数，因为haiyan结点的下一个结点为结束，而且没有条件限制，故输入任何信息都会结束。