topic Pause and Resume User Task in Alfresco Archive

Pause and Resume User Task

parul_vipparthi — Fri, 17 Dec 2010 10:08:31 GMT

HelloIs it possible to pause and resume user tasks? We also need to track the time taken betweem pause and resume task.The user clicks on pause and goes for a break, and he clicks on resume to continue. We need to track how long has he gone for a break.Thank youparul

Re: Pause and Resume User Task

jbarrez — Fri, 17 Dec 2010 10:18:52 GMT

That functionality is not available out of the box.

You can however easily do it yourself, by setting a Date variable when the user clicks a pause/resume button in your app.
When retrieving these variables, you can then compare them to get the time difference.

Re: Pause and Resume User Task

parul_vipparthi — Fri, 17 Dec 2010 10:26:19 GMT

yes, but how can it be linked to a task. Is there a way to get total time between claimimg a task and finishing it?

Thank you
parul

Re: Pause and Resume User Task

frederikherema1 — Fri, 17 Dec 2010 11:24:35 GMT

The History contains this kind of information. Currently, you can retrieve the startTime, endTime and duration from a HistoricActivityInstance. Example:


historyService.createHistoricActivityInstanceQuery().processInstanceId(myProcessId).activityType("userTask").activityName("theTask").singleResult();

Make sure the history-level is set to the right value, http://activiti.org/userguide/index.html#historyConfiguration

Re: Pause and Resume User Task

parul_vipparthi — Fri, 17 Dec 2010 12:45:56 GMT

I created some tasks and assigned to users. users completed their tasks. All through coding.
I am not able to see finished tasks through history service using
processEngine.getHistoryService()
.createHistoricActivityInstanceQuery()
   .finished()
   .orderByHistoricActivityInstanceDuration().desc()
   .listPage(0, 10);

This shows the finished tasks from examples but not the tasks which we created through coding.
Where did I go wrong?

Thank you,
parul

Re: Pause and Resume User Task

frederikherema1 — Fri, 17 Dec 2010 13:54:03 GMT

Parul,

How did you create the tasks? Were they created by a running processInstance, or did you manually create them (taskService.newTask())?

Re: Pause and Resume User Task

parul_vipparthi — Fri, 17 Dec 2010 16:39:08 GMT

Manually created


Task task = taskService.newTask();
task.setName(request.getParameter("taskname"));
taskService.saveTask(task);
String userid = request.getParameter("userid");
if(userid!=null && !userid.equals("null") && !userid.trim().equals(""))
 taskService.addCandidateUser(task.getId(),userid );

Re: Pause and Resume User Task

parul_vipparthi — Mon, 20 Dec 2010 08:34:35 GMT

Also I see that manually created tasks have no execution ids or process instance ids. Does it mean that manually created tasks cannot have a history?

Thank you,
parul

Re: Pause and Resume User Task

jbarrez — Mon, 20 Dec 2010 08:41:58 GMT

That is something which iscurrently being fixed and will end up in the 5.1 release.

Re: Pause and Resume User Task

parul_vipparthi — Thu, 23 Dec 2010 07:11:47 GMT

Hello

For Pause and Resume User Task Implementation, I have a rough idea on how to do it.

1. Extend TaskService interface

interface TaskServiceWithPauseandResume extends TaskService
{
public void pauseTask(String taskid);
public void resumeTask(String taskid);
}

2. Implement the above interface in say(TaskServiceWithPauseandResumeImpl)
3. Now when I get TaskService using processEngine.getTaskService(), I have to typecast to get Pause and Resume services.

TaskServiceWithPauseandResume mytaskservice = (TaskServiceWithPauseandResumeImpl)processEngine.getTaskService();

Is this the right way of doing it? Please suggest.

Thank you
parul

Re: Pause and Resume User Task

frederikherema1 — Thu, 23 Dec 2010 07:35:06 GMT

Parul,

I'm not sure how you will implement it, but if you only use API for this (eg. use HistoricTaskInstance to get start and end time, and use custom variables to indicate pauzed-state), I suggest you write a facade service on top of the Activiti TaskService API.

If you are doing more that just calling API-methods in your Impl (using Commands and the CommandContext), your suggestion is the cleanest way to get inside the engines context I guess…