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How to start task in date

Question asked by gslamy on Aug 6, 2015
Latest reply on Aug 7, 2015 by gslamy

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Hello everybody!

I have some problem with start my task in date from "bpm_workflowDueDate" field.

I extracted date (if it works..):


    <startEvent id="startevent" name="Start" activiti:initiator="initiator" activiti:formKey="scwf:startstaff">  
      <extensionElements>
        <activiti:taskListener event="complete" class="org.alfresco.repo.workflow.activiti.tasklistener.ScriptTaskListener">
          <activiti:field name="script">
            <activiti:string>      
               <![CDATA[execution.setVariable('startdate', task.getVariableLocal('bpm_workflowDueDate'));]]>
            </activiti:string>
          </activiti:field>
        </activiti:taskListener>
      </extensionElements> 
    </startEvent>

Now I need start next task in date from variable ("startdate"-3 days). I tried to add a timer, but I think it has a different date format and doesn't work.

Please, help me with this question, I can't find solution. Thank you.

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6 Replies

darkredd Aug 6, 2015 3:52 PM
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Hi,

Activiti timers use date formats in the ISO standard. You can use the Alfresco Utility method to convert the date you construct to the required format. http://docs.alfresco.com/4.1/references/API-JS-Utility-fromISO8601.html
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- gslamy @ darkredd on Aug 7, 2015 7:07 AM
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  I am newbie. I don't understand how to use this code it in my workflow.bpmn. I have to paste it in <activiti:taskListener event="complete" class="org.alfresco.repo.workflow.activiti.tasklistener.ScriptTaskListener"> ?
  If I got the date in variable "startdate", then how to use it in this code? Do I need only the number of days to use them between the tags <timeDate></timeDate>. Maybe there are other ways?
  var date = new Date(); var timeInMillisecs = date.getTime(); var ISODate = utils.toISO8601(timeInMillisecs); var origDate = utils.fromISO8601(ISODate);
  
  Could you give an example of the code within a workflow file?
  Thank you in advance for your help!
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  - darkredd @ gslamy on Aug 7, 2015 8:39 AM
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    Hi,
    
    I do not particularly have a workflow with what you are expecting, but I have a workflow that uses a timer like this:
    <boundaryEvent id="reminderTimer" name="Reminder Timer" attachedToRef="processingTask" cancelActivity="false"> <timerEventDefinition> <timeDate>${reminderDate}</timeDate> </timerEventDefinition> </boundaryEvent>
    
    The boundryEvent is attached to a userTask. I do not think you can attach a timer to a start event though.
    The date variable I set it in the script as follows:
    execution.setVariable('reminderDate', utils.toISO8601(reminderDate));
    
    If you are still not making any headway with this, I suggest you start by learning the basics of creating and deploying workflows.
    Here is a like to get you started: http://jmuras.com/blog/2012/creation-of-workflow-in-alfresco-using-activiti-step-by-step/
    
    Firstly, design a simple workflow before you start adding complex logic to your workflow designs; then you can start building up as you get to understand how everything fits together.
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    - gslamy @ darkredd on Aug 7, 2015 11:31 AM
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      Could I use variable "startdate" from:
      <startEvent id="startevent" name="Start" activiti:initiator="initiator" activiti:formKey="scwf:startstaff"> <extensionElements> <activiti:taskListener event="complete" class="org.alfresco.repo.workflow.activiti.tasklistener.ScriptTaskListener"> <activiti:field name="script"> <activiti:string> <![CDATA[execution.setVariable('startdate', task.getVariableLocal(utils.toISO8601('bpm_workflowDueDate')));]]> </activiti:string> </activiti:field> </activiti:taskListener> </extensionElements> </startEvent>
      
      in my timer:
      <intermediateCatchEvent id="timerintermediatecatchevent1" name="TimerCatchEvent"> <timerEventDefinition> <timeDate>${startdate}</timeDate> </timerEventDefinition> </intermediateCatchEvent>
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darkredd Aug 7, 2015 12:40 PM
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Hi,

<blockquote>The boundryEvent is attached to a userTask. I do not think you can attach a timer to a start event though.</blockquote>

You need to understand the way different components of the process definition work first. You cannot attach a timer to a start event since it is a starting task and not a waiting one. A start event only trigger for a very short while to kick start the workflow process. Once a task is dead the attached timer dies too therefore it will not fire.

I strong recommend you <strong>READ</strong> the Activiti user guide here: http://activiti.org/userguide/index.html#bpmnStartEvents

<blockquote>8.2.6. Start Events
A start event indicates where a process starts. The type of start event (process starts on arrival of message, on specific time intervals, etc.), defining how the process is started is shown as a small icon in the visual representation of the event. In the XML representation, the type is given by the declaration of a sub-element.

Start events are always catching: conceptually the event is (at any time) waiting until a certain trigger happens.

In a start event, following Activiti-specific properties can be specified:

initiator: identifies the variable name in which the authenticated user id will be stored when the process is started.<blockquote>
Example: 1
```
<startEvent id="request" activiti:initiator="initiator" />
```
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- gslamy @ darkredd on Aug 7, 2015 1:28 PM
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  But I can attach a Timer to SequenceFlow:
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How to start task in date

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