Using Activiti with spring mvc

Follow below steps to create web application using spring mvc and activiti in background

steps :1
create maven project with following pom

 4.0.0
 com.gk
 activitiMakerChecker
 war
 0.0.1-SNAPSHOT
 activitiMakerChecker Maven Webapp
 http://maven.apache.org
 
  4.2.4.RELEASE
  1.6
  4.0.5.RELEASE
  1.2
  3.1.0
  4.0.1.Final
  3.5.6-Final
 
  
  
   org.activiti
   activiti-engine
   5.14
  
  
   org.activiti
   activiti-spring
   5.14
  
  
   org.springframework
   spring-beans
   ${org.springframework.version}
  
  
   org.springframework
   spring-context
   4.2.4.RELEASE
  
  
   org.springframework
   spring-jdbc
   4.2.4.RELEASE
  
  
   org.springframework
   spring-tx
   4.2.4.RELEASE
  
  
   org.springframework
   spring-orm
   ${org.springframework.version}
  
  
   org.slf4j
   slf4j-api
   1.7.2
   
  
   org.hibernate
   hibernate-core
   ${org.hibernate.version}
  
  
   org.hibernate
   hibernate-entitymanager
   ${org.hibernate.version}
  
  
   org.hibernate
   hibernate-annotations
   ${org.hibernate.annotation.version}
   
  
   com.oracle
   ojdbc6
   11.2.0.3
  
  
   org.springframework
   spring-webmvc
   ${spring.version}
  
  
   javax.servlet
   jstl
   ${jstl.version}
  
  
   junit
   junit
   3.8.1
   test
  
 
 
  activitiMakerChecker
 
 

Step 2 create web.xml

  Archetype Created Web Application
    
    hello
    org.springframework.web.servlet.DispatcherServlet
  
  
    hello
    /
  

hello-servlet.xml

Step 3: java classes MyProcess

 
package com.nuc.process;
 
import org.activiti.engine.ProcessEngine;
import org.activiti.engine.ProcessEngineConfiguration;
import org.activiti.engine.ProcessEngines;
import org.activiti.spring.SpringProcessEngineConfiguration;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
 
 
@Controller
public class MyProcess {
 
 @Autowired
 ProcessEngine processEngine;
 @RequestMapping(value="hello")
 public String sayHello() {
  System.out.println("Controlle is here");
  if(processEngine==null)
  {
   System.out.println("Nulla");
  }
  else
  {
   System.out.println("Not null");
  }
   
   
  return "welcome";
 }
}

MyController

package com.gk.controller;
 
package com.gk.controller;
 
import java.util.HashMap;
import java.util.List;
import java.util.Map;
 
import javax.servlet.http.HttpSession;
 
import org.activiti.bpmn.model.UserTask;
import org.activiti.engine.ProcessEngine;
import org.activiti.engine.task.Task;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
 
import com.gk.dao.Dao;
import com.gk.dao.User;
import com.nuc.service.UserTaskList;
 
 
@Controller
public class MyController {
 
 @Autowired
 @Qualifier("dao")
 Dao dao;
  
 @Autowired
 private ProcessEngine processEngine;
 @RequestMapping(value=("login"),method=RequestMethod.POST)
 public String login(@RequestParam("name")String name,@RequestParam("pass")String pass,@RequestParam("gName")String gName,HttpSession session
   ) {
   
  User u1=new User();
  u1.setName(name);
  u1.setgName(gName);
  u1.setPass(pass);
//  dao.save(u1);
 // return "welcome";
  
  String vl="rtl";
  String js="/resources/js/rtl.js";
  if(vl.equalsIgnoreCase("rtl"))
  {
    js="/resources/js/rtl.js";
  }
  session.setAttribute("js", js);
 
  
 //  <link css="" href="<c:url value=" resources="" rtl.css="">" rel="stylesheet">
  //    <script src="<c:url value=${js} />"></script>
 
  User u2=dao.findById(name);
  if(u2!=null)
  {
   if(u1.getPass().equals(u2.getPass())&&u1.getgName().equals(u2.getgName()))
   {
     
    session.setAttribute("user", u1);
    return "welcome";
   }
   else
   {
    return "error";
   }
  }
  else
  {
   return "error";
  }
   
   
 }
  
 @RequestMapping(value="startProcess",method=RequestMethod.GET)
 public String startProcess(HttpSession session) {
   
  System.out.println("starting new process");
   
  Map<string object="">variables=new HashMap<string object="">();
  variables.put("name", "true");
  processEngine.getRepositoryService().createDeployment().addClasspathResource("myProcess.bpmn20.xml").deploy();
  processEngine.getRuntimeService().startProcessInstanceByKey("myProcess",variables);
  User user=(User)session.getAttribute("user");
 
  //processEngine.getRuntimeService().setVariablesLocal("vars", variables);
 // processEngine.getRuntimeService().setVariables("var", variables);
  session.setAttribute("processEngine", processEngine);
  return "myTask";
   
 }
 @RequestMapping(value="myTasks",method=RequestMethod.GET)
 public String myTasks(HttpSession session) {
  
 //System.out.println("starting new process");
   
  User user=(User)session.getAttribute("user");
  session.setAttribute("processEngine", processEngine);
   
  return "myTask";
   
 }
  
 @RequestMapping(value="claim",method=RequestMethod.GET)
 public String claim(@RequestParam("id")String id,HttpSession session) {
   
  User user=(User)session.getAttribute("user");
  processEngine.getTaskService().claim(id,user.getName());
   
  return "myTask";
 }
  
 @RequestMapping(value="complete",method=RequestMethod.GET)
 public String complete(@RequestParam("id")String id,HttpSession session) {
   
  User user=(User)session.getAttribute("user");
  processEngine.getTaskService().complete(id);
   
  return "myTask";
 }
 
}

below are jsps:
index.jsp:

<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
    
<body>
<h2>Hello World! gk1</h2>
<center>
<br>
<form method="post" action="login">

<input type="text" name="name">
<br><br>
<input type="password" name="pass">
<br><br>
<select name="gName">
 <option>m</option>
 <option>c</option>
</select>
<br><br><br>
<input type="submit">
</form>
</center>
</body>
</html>

welcome.jsp:

<%@page import="com.gk.dao.User"%>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>

<%

String myvar=(String)session.getAttribute("js");
%>

 <link href="<c:url value="/resources/css/rtl.css" />" rel="stylesheet">
 <script src=<c:url value="<%=myvar %>" />></script>
</head>
<body>
Welcome <%
User user=(User)session.getAttribute("user");
if(user!=null)
{
 out.print(user.getName());
}

%>

<%= session.getAttribute("js") %>
<c:catch>


</c:catch>
<a href="startProcess">Start Process</a>
<a href="myTasks">MyTasks</a>
</body>
</html>

mytask.jsp:

<%@page import="org.activiti.engine.ProcessEngine"%>
<%@page import="org.activiti.engine.task.Task"%>
<%@page import="java.util.List"%>
<%@page import="com.gk.dao.User"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>

your tasks


<%
 User user=(User)session.getAttribute("user");
 ProcessEngine processEngine=(ProcessEngine)session.getAttribute("processEngine");
 List<Task>tasks=processEngine.getTaskService().createTaskQuery().taskCandidateGroup(user.getgName()).list();
 out.print("<br>");
 out.print("Tasks in your group");
 for(Task t:tasks)
 {
  out.print("<br>Id:"+t.getId()+"Name:"+t.getName()+"<a href='claim?id="+t.getId()+"'>Claim it</a>");
 }
 out.print("<br>");
 out.print("Your tasks");
 List<Task>myTasks=processEngine.getTaskService().createTaskQuery().taskAssignee(user.getName()).list();
 for(Task t:myTasks)
 {
  out.print("<br>Id:"+t.getId()+"Name:"+t.getName()+"<a href='complete?id="+t.getId()+"'>Complete it</a>");
 }
 
%>
</body>
</html>