There are multiple ways of doing it .. the way i have tackled it is :
Here is some sample code from my project.. I thought the best way was sharing related code.
// Controller code for .. notice approval or rejects comes from the same jsp in a parameter. : The task Id is the is id of the task created for the user .. {lookup taskservice.. } you will need this taskid to track actions performed on a task ..
protected ModelAndView onSubmit(HttpServletRequest request, HttpServletResponse response, Object command, BindException errors) throws ServletException {
String requestId = request.getParameter("requestId");
String status = request.getParameter("status"); // approved OR rejected captured from JSP
String taskId = request.getParameter("taskId");
String taskType=request.getParameter("taskType");
LoginUser loginUser =(LoginUser)request.getSession().getAttribute(MasterUtil.LOGGED_USER);
lmsService.approval(requestId,status,taskId,taskType,loginUser.getUsername()); // service method
Map retMap = new HashMap();
try {
retMap.putAll(referenceData(request));
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
//return new ModelAndView("redirect:/approveLeave.htm",retMap);
return new ModelAndView(getFormView(),retMap);
}
// This is a method from lmsservice.. lmsService.approval() which takes care of the inputs from the controller.
public void approval(String requestID, String status ,String taskId,String taskType,String userId) {
if(status.equals("rejected")){
ApproveLeaveModel aml =leaveModuleDao.getLeaveRequestbyId(requestID);
leaveModuleDao.manageLC(aml.getDays(),aml.getRequestorEmpCode(),aml.getDetails());
}
//leaveModuleDao.changeLeaveStatus(requestID, status);
Map<String,Object> variables = new HashMap<String,Object>();
variables.put("decision", status); // this is where you setup a variable in the process .. let a decision state decide on the //basis of this variable and take the appropriate route .. attached my jpdl image
taskService.setVariables(taskId, variables); // assign variable to the process instance.
if(taskType.equals("g")){
taskService.takeTask(taskId, userId);
}
taskService.completeTask(taskId); // This completes a task marked by a specific task id
}