topic Re: Modified Parrarel Workflow in Alfresco Archive

Modified Parrarel Workflow

nunuts — Fri, 20 Apr 2012 02:35:54 GMT

Hi guysI'm working on a workflow and need your advice. I'm creating a modified parrarel workflow and my requirement is when one of assigness rejects the workflow, the workflow will stop without waiting for other assignees. Is possible and if it is, how can i achieve it?Thank You

Re: Modified Parrarel Workflow

afaust — Fri, 20 Apr 2012 08:44:20 GMT

Hello,

this is possible in both jBPM and Spring. You need to incorporate a system action when the user choses to reject his/her task, which will withdraw the task(s) assigned to (the) other assignee(s). In jBPM you can achieve this through e.g. through a jBPM script on the "rejected" transition that looks up the other tasks and signals an appropriate transition on it.

Regards
Axel

Re: Modified Parrarel Workflow

lyles — Sun, 29 Apr 2012 00:25:02 GMT

To get that behaviour in the out-of-box Parallel Review and Approve workflow you just have to set the Required Approval Percentage to 100%. As soon as one reviewer rejects it, the completion condition is met and the workflow flows back to the originator as a rejection.

Re: Modified Parrarel Workflow

afaust — Sun, 29 Apr 2012 12:37:49 GMT

@lyles: This is correct, but only for the Activiti-based out-of-the-box parallel review & approve workflow - the jBPM one does not behave in this manner.

Re: Modified Parrarel Workflow

nunuts — Tue, 01 May 2012 09:59:37 GMT

Thank for replay for both of you
@AFaust

this is possible in both jBPM and Spring. You need to incorporate a system action when the user choses to reject his/her task, which will withdraw the task(s) assigned to (the) other assignee(s). In jBPM you can achieve this through e.g. through a jBPM script on the "rejected" transition that looks up the other tasks and signals an appropriate transition on it.

If you don't mind, can you gime a sample code ?

Re: Modified Parrarel Workflow

afaust — Fri, 04 May 2012 08:33:08 GMT

Hello,

an example based on jBPM script would be:


<transition name="join" to="completeExecutionBranches">
            <script>
                <expression><![CDATA[
                    /* end parallel tasks in a for-loop */
                    /* NOTE: The current task is one of those tasks, so our "parent" token is the root for the forks */
                    Collection children = token.getParent().getChildren().values();
                    for (Token child : children) {
                        /* NOTE: don't mess up the current token */
                        if (child.getId() != token.getId()) {
                            /* NOTE: "end" must be a valid transition */
                            Collection tasks = taskMgmt.getUnfinishedTasks(child)
                            for (TaskInstance task : tasks) {
                               task.end("end");
                            }
                        }
                    }
                ]]></expression>
            </script>
</transition>
[/code]

This example assumes you only have one task between your fork and join, and which has a valid transition namend "end".

Please note: For the tasks ended by this script, the current user is automatically set as the modifier / owner of the task and no (additional) data is being set in the tasks. If there are mandatory task properties to be filled, this may fail if they have not yet been set.
You should also be fairly familiar with the jBPM engine in general (not just how you use it in Alfresco) when you work with the jBPM core like this.

Regards
Axel‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Re: Modified Parrarel Workflow

nunuts — Tue, 08 May 2012 07:13:37 GMT

Hello,

an example based on jBPM script would be:


<transition name="join" to="completeExecutionBranches">
            <script>
                <expression><![CDATA[
                    /* end parallel tasks in a for-loop */
                    /* NOTE: The current task is one of those tasks, so our "parent" token is the root for the forks */
                    Collection children = token.getParent().getChildren().values();
                    for (Token child : children) {
                        /* NOTE: don't mess up the current token */
                        if (child.getId() != token.getId()) {
                            /* NOTE: "end" must be a valid transition */
                            Collection tasks = taskMgmt.getUnfinishedTasks(child)
                            for (TaskInstance task : tasks) {
                               task.end("end");
                            }
                        }
                    }
                ]]></expression>
            </script>
</transition>
[/code]

This example assumes you only have one task between your fork and join, and which has a valid transition namend "end".

Please note: For the tasks ended by this script, the current user is automatically set as the modifier / owner of the task and no (additional) data is being set in the tasks. If there are mandatory task properties to be filled, this may fail if they have not yet been set.
You should also be fairly familiar with the jBPM engine in general (not just how you use it in Alfresco) when you work with the jBPM core like this.

Regards
Axel[/quote]

Thank you for your reply  :P‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Re: Modified Parrarel Workflow

webfrank — Wed, 06 Feb 2013 14:12:10 GMT

Hi, I just tried your solution but when I choose that transition I got error 500. I have a simple parallel workflow and I would like to cancel all pending tasks when one of the approver reject the document without waiting all the others.
I have only a task inside fork-join, task transitions are "reject" "approve", both to "endreview" but with "approve" which increment approveCount.
I'm using Alfresco 4.0c Community. Any help is really appreciated.

Re: Modified Parrarel Workflow

mitpatoliya — Thu, 07 Feb 2013 10:33:45 GMT

what is the error you are getting in your logs when you do this.
That may be because your target node is not present.
Also have you tried with action class?

Re: Modified Parrarel Workflow

webfrank — Mon, 11 Feb 2013 10:39:24 GMT

Hi, this is the error I got:

org.alfresco.service.cmr.workflow.WorkflowException: 011116857 Failed to signal transition reject from workflow task jbpm$137493.
Returning 500 status code

What do you mena for target node? The transaction "to" node? It exists, in my WF this is the code:

<transition name="reject" to="endreview">
            <script>
            Collection children = token.getParent().getChildren().values();
            for (Token child : children) {
               if (child.getId() != token.getId()) {
                  Collection tasks = taskMgmt.getUnfinishedTasks(child);
                  for (TaskInstance task : tasks) {
                     task.end("reject");
                  }
               }
            }
            </script>
      </transition>

and

<join name="endreview">
      <transition to="isapproved" />
   </join>

is the target node.

I'm just now trying with action class but I'm not sure how to get "taskMgmt" instance.